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t&&(r=x(e),n=r,C.test(n)&&N.test(n[0].toUpperCase()+n.slice(1))||A[r]||u("css-number",'Number-typed values are deprecated for jQuery.fn.css( "'+e+'", value )')),Q.apply(this,arguments))},"css-number");var S,P,k,H,E=s.data;i(s,"data",function(e,t,r){var n,o,a;if(t&&"object"==typeof t&&2===arguments.length){for(a in n=s.hasData(e)&&E.call(this,e),o={},t)a!==x(a)?(u("data-camelCase","jQuery.data() always sets/gets camelCased names: "+a),n[a]=t[a]):o[a]=t[a];return E.call(this,e,o),t}return t&&"string"==typeof t&&t!==x(t)&&(n=s.hasData(e)&&E.call(this,e))&&t in n?(u("data-camelCase","jQuery.data() always sets/gets camelCased names: "+t),2<arguments.length&&(n[t]=r),n[t]):E.apply(this,arguments)},"data-camelCase"),s.fx&&(k=s.Tween.prototype.run,H=function(e){return e},i(s.Tween.prototype,"run",function(){1<s.easing[this.easing].length&&(u("easing-one-arg","'jQuery.easing."+this.easing.toString()+"' should use only one argument"),s.easing[this.easing]=H),k.apply(this,arguments)},"easing-one-arg"),S=s.fx.interval,P="jQuery.fx.interval is deprecated",n.requestAnimationFrame&&Object.defineProperty(s.fx,"interval",{configurable:!0,enumerable:!0,get:function(){return n.document.hidden||u("fx-interval",P),s.migrateIsPatchEnabled("fx-interval")&&void 0===S?13:S},set:function(e){u("fx-interval",P),S=e}}));var M=s.fn.load,q=s.event.add,O=s.event.fix;s.event.props=[],s.event.fixHooks={},r(s.event.props,"concat",s.event.props.concat,"event-old-patch","jQuery.event.props.concat() is deprecated and removed"),i(s.event,"fix",function(e){var t,r=e.type,n=this.fixHooks[r],o=s.event.props;if(o.length){u("event-old-patch","jQuery.event.props are deprecated and removed: "+o.join());while(o.length)s.event.addProp(o.pop())}if(n&&!n._migrated_&&(n._migrated_=!0,u("event-old-patch","jQuery.event.fixHooks are deprecated and removed: "+r),(o=n.props)&&o.length))while(o.length)s.event.addProp(o.pop());return t=O.call(this,e),n&&n.filter?n.filter(t,e):t},"event-old-patch"),i(s.event,"add",function(e,t){return e===n&&"load"===t&&"complete"===n.document.readyState&&u("load-after-event","jQuery(window).on('load'...) called after load event occurred"),q.apply(this,arguments)},"load-after-event"),s.each(["load","unload","error"],function(e,t){i(s.fn,t,function(){var e=Array.prototype.slice.call(arguments,0);return"load"===t&&"string"==typeof e[0]?M.apply(this,e):(u("shorthand-removed-v3","jQuery.fn."+t+"() is deprecated"),e.splice(0,0,t),arguments.length?this.on.apply(this,e):(this.triggerHandler.apply(this,e),this))},"shorthand-removed-v3")}),s.each("blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu".split(" "),function(e,r){c(s.fn,r,function(e,t){return 0<arguments.length?this.on(r,null,e,t):this.trigger(r)},"shorthand-deprecated-v3","jQuery.fn."+r+"() event shorthand is deprecated")}),s(function(){s(n.document).triggerHandler("ready")}),s.event.special.ready={setup:function(){this===n.document&&u("ready-event","'ready' event is deprecated")}},c(s.fn,"bind",function(e,t,r){return this.on(e,null,t,r)},"pre-on-methods","jQuery.fn.bind() is deprecated"),c(s.fn,"unbind",function(e,t){return this.off(e,null,t)},"pre-on-methods","jQuery.fn.unbind() is deprecated"),c(s.fn,"delegate",function(e,t,r,n){return this.on(t,e,r,n)},"pre-on-methods","jQuery.fn.delegate() is deprecated"),c(s.fn,"undelegate",function(e,t,r){return 1===arguments.length?this.off(e,"**"):this.off(t,e||"**",r)},"pre-on-methods","jQuery.fn.undelegate() is deprecated"),c(s.fn,"hover",function(e,t){return this.on("mouseenter",e).on("mouseleave",t||e)},"pre-on-methods","jQuery.fn.hover() is deprecated");function T(e){var t=n.document.implementation.createHTMLDocument("");return t.body.innerHTML=e,t.body&&t.body.innerHTML}var F=/<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\/\0>\x20\t\r\n\f]*)[^>]*)\/>/gi;s.UNSAFE_restoreLegacyHtmlPrefilter=function(){s.migrateEnablePatches("self-closed-tags")},i(s,"htmlPrefilter",function(e){var t,r;return(r=(t=e).replace(F,"<$1></$2>"))!==t&&T(t)!==T(r)&&u("self-closed-tags","HTML tags must be properly nested and closed: "+t),e.replace(F,"<$1></$2>")},"self-closed-tags"),s.migrateDisablePatches("self-closed-tags");var D,W,_,I=s.fn.offset;return i(s.fn,"offset",function(){var e=this[0];return!e||e.nodeType&&e.getBoundingClientRect?I.apply(this,arguments):(u("offset-valid-elem","jQuery.fn.offset() requires a valid DOM element"),arguments.length?this:void 0)},"offset-valid-elem"),s.ajax&&(D=s.param,i(s,"param",function(e,t){var r=s.ajaxSettings&&s.ajaxSettings.traditional;return void 0===t&&r&&(u("param-ajax-traditional","jQuery.param() no longer uses jQuery.ajaxSettings.traditional"),t=r),D.call(this,e,t)},"param-ajax-traditional")),c(s.fn,"andSelf",s.fn.addBack,"andSelf","jQuery.fn.andSelf() is deprecated and removed, use jQuery.fn.addBack()"),s.Deferred&&(W=s.Deferred,_=[["resolve","done",s.Callbacks("once memory"),s.Callbacks("once memory"),"resolved"],["reject","fail",s.Callbacks("once memory"),s.Callbacks("once memory"),"rejected"],["notify","progress",s.Callbacks("memory"),s.Callbacks("memory")]],i(s,"Deferred",function(e){var a=W(),i=a.promise();function t(){var o=arguments;return s.Deferred(function(n){s.each(_,function(e,t){var r="function"==typeof o[e]&&o[e];a[t[1]](function(){var e=r&&r.apply(this,arguments);e&&"function"==typeof e.promise?e.promise().done(n.resolve).fail(n.reject).progress(n.notify):n[t[0]+"With"](this===i?n.promise():this,r?[e]:arguments)})}),o=null}).promise()}return c(a,"pipe",t,"deferred-pipe","deferred.pipe() is deprecated"),c(i,"pipe",t,"deferred-pipe","deferred.pipe() is deprecated"),e&&e.call(a,a),a},"deferred-pipe"),s.Deferred.exceptionHook=W.exceptionHook),s});
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-embed-addon/public/js/wpvr-embed-addon-public.js?ver=1.2.2 
(function( $ ) {
	'use strict';

	/**
	 * All of the code for your public-facing JavaScript source
	 * should reside in this file.
	 *
	 * Note: It has been assumed you will write jQuery code here, so the
	 * $ function reference has been prepared for usage within the scope
	 * of this function.
	 *
	 * This enables you to define handlers, for when the DOM is ready:
	 *
	 * $(function() {
	 *
	 * });
	 *
	 * When the window is loaded:
	 *
	 * $( window ).load(function() {
	 *
	 * });
	 *
	 * ...and/or other possibilities.
	 *
	 * Ideally, it is not considered best practise to attach more than a
	 * single DOM-ready or window-load handler for a particular page.
	 * Although scripts in the WordPress core, Plugins and Themes may be
	 * practising this, we should strive to set a better example in our own work.
	 */

})( jQuery );
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/public/js/wpvr-pro-public.js?ver=6.7.0 
(function( $ ) {
	'use strict';

	/**
	 * All of the code for your public-facing JavaScript source
	 * should reside in this file.
	 *
	 * Note: It has been assumed you will write jQuery code here, so the
	 * $ function reference has been prepared for usage within the scope
	 * of this function.
	 *
	 * This enables you to define handlers, for when the DOM is ready:
	 *
	 * $(function() {
	 *
	 * });
	 *
	 * When the window is loaded:
	 *
	 * $( window ).load(function() {
	 *
	 * });
	 *
	 * ...and/or other possibilities.
	 *
	 * Ideally, it is not considered best practise to attach more than a
	 * single DOM-ready or window-load handler for a particular page.
	 * Although scripts in the WordPress core, Plugins and Themes may be
	 * practising this, we should strive to set a better example in our own work.
	 */

	jQuery(document).ready(function($) {
		// Handle floorplan pointer positioning for responsive images
		function adjustFloorplanPointers() {
			$('.wpvr-floor-map').each(function() {
				var $floorMap = $(this);
				var $img = $floorMap.find('img');
				var $pointers = $floorMap.find('.floor-plan-pointer');
				
				if ($img.length && $pointers.length) {
					// Get actual image dimensions
					var imgWidth = $img[0].naturalWidth || $img[0].width;
					var imgHeight = $img[0].naturalHeight || $img[0].height;
					var displayWidth = $img.width();
					var displayHeight = $img.height();
					
					// Calculate scaling factors
					var scaleX = displayWidth / imgWidth;
					var scaleY = displayHeight / imgHeight;
					
					// Pointer dimensions (24px based on typical pointer size)
					var pointerWidth = 24;
					var pointerHeight = 24;
					
					// Calculate pointer offset percentages
					var pointerOffsetX = (pointerWidth / 2) / displayWidth * 100;
					var pointerOffsetY = (pointerHeight / 2) / displayHeight * 100;
					
					// Adjust each pointer position
					$pointers.each(function() {
						var $pointer = $(this);
						var originalTop = parseFloat($pointer.attr('data-top'));
						var originalLeft = parseFloat($pointer.attr('data-left'));
						
						// Convert percentage to pixels based on original dimensions
						var originalTopPx = (originalTop / 100) * imgHeight;
						var originalLeftPx = (originalLeft / 100) * imgWidth;
						
						// Scale to display dimensions
						var displayTopPx = originalTopPx * scaleY;
						var displayLeftPx = originalLeftPx * scaleX;
						
						// Convert back to percentage based on display dimensions
						var displayTopPercent = (displayTopPx / displayHeight) * 100;
						var displayLeftPercent = (displayLeftPx / displayWidth) * 100;
						
						// Apply boundary constraints
						displayTopPercent = Math.max(pointerOffsetY, Math.min(100 - pointerOffsetY, displayTopPercent));
						displayLeftPercent = Math.max(pointerOffsetX, Math.min(100 - pointerOffsetX, displayLeftPercent));
						
						// Update pointer position
						$pointer.css({
							'top': displayTopPercent + '%',
							'left': displayLeftPercent + '%'
						});
					});
				}
			});
		}
	
		// Run on image load and window resize
		$(window).on('load resize', function() {
			setTimeout(adjustFloorplanPointers, 100);
		});
	
		// Also run when floorplan is shown
		$(document).on('click', '.flooplan-toggle, [class*="floorplan"]', function() {
			setTimeout(adjustFloorplanPointers, 200);
		});
		
		// Initial adjustment
		setTimeout(adjustFloorplanPointers, 500);
	});

        // =====================================================================
        // Analytics 2.0 — Custom event dispatching hooks (T015)
        // Dispatches CustomEvents so wpvr-analytics-tracker.js can listen.
        // =====================================================================
        $(document).on('wpvr_tour_loaded', function (e, tourId) {
                document.dispatchEvent(new CustomEvent('wpvr:tour_loaded', { detail: { tour_id: tourId } }));
        });

        $(document).on('wpvr_scene_changed', function (e, from, to) {
                document.dispatchEvent(new CustomEvent('wpvr:scene_changed', { detail: { from: from, to: to } }));
        });

        $(document).on('wpvr_hotspot_hovered', function (e, hotspotId, sceneId) {
                document.dispatchEvent(new CustomEvent('wpvr:hotspot_hovered', { detail: { hotspot_id: hotspotId, scene_id: sceneId } }));
        });

        $(document).on('wpvr_hotspot_clicked', function (e, hotspotId, sceneId, hotspotType, url) {
                document.dispatchEvent(new CustomEvent('wpvr:hotspot_clicked', {
                        detail: { hotspot_id: hotspotId, scene_id: sceneId, hotspot_type: hotspotType, url: url || '' }
                }));
        });

        // The free plugin's wpvrhotspot() is a direct Pannellum clickHandlerFunc callback
        // and never fires the wpvr_hotspot_clicked jQuery event above. Wrap the global
        // function at DOM-ready (after the free plugin script has defined it) so that
        // content hotspot clicks (info/URL types) are tracked in Analytics 2.0.
        $(function () {
            if (typeof window.wpvrhotspot === 'function') {
                var _originalWpvrHotspot = window.wpvrhotspot;
                window.wpvrhotspot = function (hotSpotDiv, hotspotData) {
                    document.dispatchEvent(new CustomEvent('wpvr:hotspot_clicked', {
                        detail: {
                            hotspot_id:   (hotspotData && hotspotData.hotspot_id)   || null,
                            scene_id:     (hotspotData && hotspotData.scene_id)     || null,
                            hotspot_type: 'info',
                            url:          (hotspotData && hotspotData.url)          || null
                        }
                    }));
                    return _originalWpvrHotspot(hotSpotDiv, hotspotData);
                };
            }
        });

}(jQuery));
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/public/lib/pannellum/src/js/pannellum.js?ver=1 
/*
 * Pannellum - An HTML5 based Panorama Viewer
 * Copyright (c) 2011-2019 Matthew Petroff
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

window.pannellum = (function(window, document, undefined) {

    'use strict';

    /**
     * Creates a new panorama viewer.
     * @constructor
     * @param {HTMLElement|string} container - The container (div) element for the
     *      viewer, or its ID.
     * @param {Object} initialConfig - Inital configuration for viewer.
     */
    function Viewer(container, initialConfig) {

        var _this = this;

// Declare variables
        var config,
            renderer,
            preview,
            isUserInteracting = false,
            latestInteraction = Date.now(),
            onPointerDownPointerX = 0,
            onPointerDownPointerY = 0,
            onPointerDownPointerDist = -1,
            onPointerDownYaw = 0,
            onPointerDownPitch = 0,
            keysDown = new Array(10),
            fullscreenActive = false,
            loaded,
            error = false,
            isTimedOut = false,
            listenersAdded = false,
            panoImage,
            prevTime,
            speed = {'yaw': 0, 'pitch': 0, 'hfov': 0},
            animating = false,
            orientation = false,
            orientationYawOffset = 0,
            autoRotateStart,
            autoRotateSpeed = 0,
            origHfov,
            origPitch,
            animatedMove = {},
            externalEventListeners = {},
            specifiedPhotoSphereExcludes = [],
            update = false, // Should we update when still to render dynamic content
            eps = 1e-6,
            hotspotsCreated = false,
            destroyed = false;

        var defaultConfig = {
            hfov: 100,
            minHfov: 50,
            multiResMinHfov: false,
            maxHfov: 120,
            pitch: 0,
            minPitch: undefined,
            maxPitch: undefined,
            yaw: 0,
            minYaw: -180,
            maxYaw: 180,
            roll: 0,
            haov: 360,
            vaov: 180,
            vOffset: 0,
            autoRotate: false,
            autoRotateInactivityDelay: -1,
            autoRotateStopDelay: undefined,
            type: 'equirectangular',
            northOffset: 0,
            showFullscreenCtrl: true,
            dynamic: false,
            dynamicUpdate: false,
            doubleClickZoom: true,
            keyboardZoom: true,
            mouseZoom: true,
            showZoomCtrl: true,
            autoLoad: false,
            showControls: true,
            orientationOnByDefault: false,
            hotSpotDebug: false,
            backgroundColor: [0, 0, 0],
            avoidShowingBackground: false,
            animationTimingFunction: timingFunction,
            draggable: true,
            disableKeyboardCtrl: false,
            crossOrigin: 'anonymous',
            touchPanSpeedCoeffFactor: 1,
            capturedKeyNumbers: [16, 17, 27, 37, 38, 39, 40, 61, 107, 109, 173, 187, 189],
            friction: 0.15
        };

// Translatable / configurable strings
// Some strings contain '%s', which is a placeholder for inserted values
// When setting strings in external configuration, `\n` should be used instead of `<br>` to insert line breaks
        defaultConfig.strings = {
            // Labels
            loadButtonLabel: 'Click to<br>Load<br>Panorama',
            loadingLabel: 'Loading...',
            bylineLabel: ' %s',    // One substitution: author

            // Errors
            noPanoramaError: 'No panorama image was specified.',
            fileAccessError: 'The file %s could not be accessed.',  // One substitution: file URL
            malformedURLError: 'There is something wrong with the panorama URL.',
            iOS8WebGLError: "Due to iOS 8's broken WebGL implementation, only " +
                "progressive encoded JPEGs work for your device (this " +
                "panorama uses standard encoding).",
            genericWebGLError: 'Your browser does not have the necessary WebGL support to display this panorama.',
            textureSizeError: 'This panorama is too big for your device! It\'s ' +
                '%spx wide, but your device only supports images up to ' +
                '%spx wide. Try another device.' +
                ' (If you\'re the author, try scaling down the image.)',    // Two substitutions: image width, max image width
            unknownError: 'Unknown error. Check developer console.',
        };

// Initialize container
        container = typeof container === 'string' ? document.getElementById(container) : container;
        container.classList.add('pnlm-container');
        container.tabIndex = 0;

// Create container for ui
        var uiContainer = document.createElement('div');
        uiContainer.className = 'pnlm-ui';
        container.appendChild(uiContainer);

// Create container for renderer
        var renderContainer = document.createElement('div');
        renderContainer.className = 'pnlm-render-container';
        container.appendChild(renderContainer);
        var dragFix = document.createElement('div');
        dragFix.className = 'pnlm-dragfix';
        uiContainer.appendChild(dragFix);

// Display about information on right click off
//         var aboutMsg = document.createElement('span');
//         aboutMsg.className = 'pnlm-about-msg';
//==wpvr custom rextheme link==//
//         aboutMsg.innerHTML = '<a href="https://rextheme.com/docs/wpvr-360-panorama-and-virtual-tour-creator-for-wordpress/" target="_blank">Rextheme</a>';
//==wpvr custom rextheme link end==//
//         uiContainer.appendChild(aboutMsg);
//         dragFix.addEventListener('contextmenu', aboutMessage);

// Create info display
        var infoDisplay = {};

// Hot spot debug indicator
        var hotSpotDebugIndicator = document.createElement('div');
        hotSpotDebugIndicator.className = 'pnlm-sprite pnlm-hot-spot-debug-indicator';
        uiContainer.appendChild(hotSpotDebugIndicator);

// Panorama info
        infoDisplay.container = document.createElement('div');
        infoDisplay.container.className = 'pnlm-panorama-info';
        infoDisplay.title = document.createElement('div');
        infoDisplay.title.className = 'pnlm-title-box';
        infoDisplay.container.appendChild(infoDisplay.title);
        infoDisplay.author = document.createElement('div');
        infoDisplay.author.className = 'pnlm-author-box';
        infoDisplay.container.appendChild(infoDisplay.author);
        uiContainer.appendChild(infoDisplay.container);

// Load box
        infoDisplay.load = {};
        infoDisplay.load.box = document.createElement('div');
        infoDisplay.load.box.className = 'pnlm-load-box';
        infoDisplay.load.boxp = document.createElement('p');
        infoDisplay.load.box.appendChild(infoDisplay.load.boxp);
        infoDisplay.load.lbox = document.createElement('div');
        infoDisplay.load.lbox.className = 'pnlm-lbox';
        infoDisplay.load.lbox.innerHTML = '<div class="pnlm-loading"></div>';
        infoDisplay.load.box.appendChild(infoDisplay.load.lbox);
        infoDisplay.load.lbar = document.createElement('div');
        infoDisplay.load.lbar.className = 'pnlm-lbar';
        infoDisplay.load.lbarFill = document.createElement('div');
        infoDisplay.load.lbarFill.className = 'pnlm-lbar-fill';
        infoDisplay.load.lbar.appendChild(infoDisplay.load.lbarFill);
        infoDisplay.load.box.appendChild(infoDisplay.load.lbar);
        infoDisplay.load.msg = document.createElement('p');
        infoDisplay.load.msg.className = 'pnlm-lmsg';
        infoDisplay.load.box.appendChild(infoDisplay.load.msg);
        uiContainer.appendChild(infoDisplay.load.box);

// Error message
        infoDisplay.errorMsg = document.createElement('div');
        infoDisplay.errorMsg.className = 'pnlm-error-msg pnlm-info-box';
        uiContainer.appendChild(infoDisplay.errorMsg);

// Create controls
        var controls = {};
        controls.container = document.createElement('div');
        controls.container.className = 'pnlm-controls-container';
        uiContainer.appendChild(controls.container);

// Load button
        controls.load = document.createElement('div');
        controls.load.className = 'pnlm-load-button';
        controls.load.addEventListener('click', function() {
            processOptions();
            load();
        });
        uiContainer.appendChild(controls.load);

// Zoom controls
        controls.zoom = document.createElement('div');
        controls.zoom.className = 'pnlm-zoom-controls pnlm-controls';
        controls.zoomIn = document.createElement('div');
        controls.zoomIn.className = 'pnlm-zoom-in pnlm-sprite pnlm-control';
        controls.zoomIn.addEventListener('click', zoomIn);
        controls.zoom.appendChild(controls.zoomIn);
        controls.zoomOut = document.createElement('div');
        controls.zoomOut.className = 'pnlm-zoom-out pnlm-sprite pnlm-control';
        controls.zoomOut.addEventListener('click', zoomOut);
        controls.zoom.appendChild(controls.zoomOut);
        controls.container.appendChild(controls.zoom);

// Fullscreen toggle
        controls.fullscreen = document.createElement('div');
        controls.fullscreen.addEventListener('click', toggleFullscreen);
        controls.fullscreen.className = 'pnlm-fullscreen-toggle-button pnlm-sprite pnlm-fullscreen-toggle-button-inactive pnlm-controls pnlm-control';
        if (document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled || document.msFullscreenEnabled)
            controls.container.appendChild(controls.fullscreen);

// Device orientation toggle
        controls.orientation = document.createElement('div');
        controls.orientation.addEventListener('click', function(e) {
            if (orientation)
                stopOrientation();
            else
                startOrientation();
        });
        controls.orientation.addEventListener('mousedown', function(e) {e.stopPropagation();});
        controls.orientation.addEventListener('touchstart', function(e) {e.stopPropagation();});
        controls.orientation.addEventListener('pointerdown', function(e) {e.stopPropagation();});
        controls.orientation.className = 'pnlm-orientation-button pnlm-orientation-button-inactive pnlm-sprite pnlm-controls pnlm-control';
        var orientationSupport = false;
        if (window.DeviceOrientationEvent && location.protocol == 'https:' &&
            navigator.userAgent.toLowerCase().indexOf('mobi') >= 0) {
            // This user agent check is here because there's no way to check if a
            // device has an inertia measurement unit. We used to be able to check if a
            // DeviceOrientationEvent had non-null values, but with iOS 13 requiring a
            // permission prompt to access such events, this is no longer possible.
            controls.container.appendChild(controls.orientation);
            orientationSupport = true;
        }

// Compass
        var compass = document.createElement('div');
        compass.className = 'pnlm-compass pnlm-controls pnlm-control';
        uiContainer.appendChild(compass);

// Load and process configuration
        if (initialConfig.firstScene) {
            // Activate first scene if specified in URL
            mergeConfig(initialConfig.firstScene);
        } else if (initialConfig.default && initialConfig.default.firstScene) {
            // Activate first scene if specified in file
            mergeConfig(initialConfig.default.firstScene);
        } else {
            mergeConfig(null);
        }
        processOptions(true);

        /**
         * Initializes viewer.
         * @private
         */
        function init() {
            // Display an error for IE 9 as it doesn't work but also doesn't otherwise
            // show an error (older versions don't work at all)
            // Based on: http://stackoverflow.com/a/10965203
            var div = document.createElement("div");
            div.innerHTML = "<!--[if lte IE 9]><i></i><![endif]-->";
            if (div.getElementsByTagName("i").length == 1) {
                anError();
                return;
            }

            origHfov = config.hfov;
            origPitch = config.pitch;

            var i, p;

            if (config.type == 'cubemap') {
                panoImage = [];
                for (i = 0; i < 6; i++) {
                    panoImage.push(new Image());
                    panoImage[i].crossOrigin = config.crossOrigin;
                }
                infoDisplay.load.lbox.style.display = 'block';
                infoDisplay.load.lbar.style.display = 'none';
            } else if (config.type == 'multires') {
                var c = JSON.parse(JSON.stringify(config.multiRes));    // Deep copy
                // Avoid "undefined" in path, check (optional) multiRes.basePath, too
                // Use only multiRes.basePath if it's an absolute URL
                if (config.basePath && config.multiRes.basePath &&
                    !(/^(?:[a-z]+:)?\/\//i.test(config.multiRes.basePath))) {
                    c.basePath = config.basePath + config.multiRes.basePath;
                } else if (config.multiRes.basePath) {
                    c.basePath = config.multiRes.basePath;
                } else if(config.basePath) {
                    c.basePath = config.basePath;
                }
                panoImage = c;
            } else {
                if (config.dynamic === true) {
                    panoImage = config.panorama;
                } else {
                    if (config.panorama === undefined) {
                        anError(config.strings.noPanoramaError);
                        return;
                    }
                    panoImage = new Image();
                }
            }

            // Configure image loading
            if (config.type == 'cubemap') {
                // Quick loading counter for synchronous loading
                var itemsToLoad = 6;

                var onLoad = function() {
                    itemsToLoad--;
                    if (itemsToLoad === 0) {
                        onImageLoad();
                    }
                };

                var onError = function(e) {
                    var a = document.createElement('a');
                    a.href = e.target.src;
                    a.textContent = a.href;
                    anError(config.strings.fileAccessError.replace('%s', a.outerHTML));
                };

                for (i = 0; i < panoImage.length; i++) {
                    p = config.cubeMap[i];
                    if (p == "null") { // support partial cubemap image with explicitly empty faces
                        console.log('Will use background instead of missing cubemap face ' + i);
                        onLoad();
                    } else {
                        if (config.basePath && !absoluteURL(p)) {
                            p = config.basePath + p;
                        }
                        panoImage[i].onload = onLoad;
                        panoImage[i].onerror = onError;
                        panoImage[i].src = sanitizeURL(p);
                    }
                }
            } else if (config.type == 'multires') {
                onImageLoad();
            } else {
                p = '';
                if (config.basePath) {
                    p = config.basePath;
                }

                if (config.dynamic !== true) {
                    // Still image
                    p = absoluteURL(config.panorama) ? config.panorama : p + config.panorama;

                    panoImage.onload = function() {
                        window.URL.revokeObjectURL(this.src);  // Clean up
                        onImageLoad();
                    };

                    var xhr = new XMLHttpRequest();
                    xhr.onloadend = function() {
                        if (xhr.status != 200) {
                            // Display error if image can't be loaded
                            var a = document.createElement('a');
                            a.href = p;
                            a.textContent = a.href;
                            anError(config.strings.fileAccessError.replace('%s', a.outerHTML));
                        }
                        var img = this.response;
                        parseGPanoXMP(img, p);
                        infoDisplay.load.msg.innerHTML = '';
                    };
                    xhr.onprogress = function(e) {
                        if (e.lengthComputable) {
                            // Display progress
                            var percent = e.loaded / e.total * 100;
                            infoDisplay.load.lbarFill.style.width = percent + '%';
                            var unit, numerator, denominator;
                            if (e.total > 1e6) {
                                unit = 'MB';
                                numerator = (e.loaded / 1e6).toFixed(2);
                                denominator = (e.total / 1e6).toFixed(2);
                            } else if (e.total > 1e3) {
                                unit = 'kB';
                                numerator = (e.loaded / 1e3).toFixed(1);
                                denominator = (e.total / 1e3).toFixed(1);
                            } else {
                                unit = 'B';
                                numerator = e.loaded;
                                denominator = e.total;
                            }
                            infoDisplay.load.msg.innerHTML = numerator + ' / ' + denominator + ' ' + unit;
                        } else {
                            // Display loading spinner
                            infoDisplay.load.lbox.style.display = 'block';
                            infoDisplay.load.lbar.style.display = 'none';
                        }
                    };
                    try {
                        xhr.open('GET', p, true);
                    } catch (e) {
                        // Malformed URL
                        anError(config.strings.malformedURLError);
                    }
                    xhr.responseType = 'blob';
                    xhr.setRequestHeader('Accept', 'image/*,*/*;q=0.9');
                    xhr.withCredentials = config.crossOrigin === 'use-credentials';
                    xhr.send();
                }
            }

            if (config.draggable)
                uiContainer.classList.add('pnlm-grab');
            uiContainer.classList.remove('pnlm-grabbing');

            // Properly handle switching to dynamic scenes
            update = config.dynamicUpdate === true;
            if (config.dynamic && update) {
                panoImage = config.panorama;
                onImageLoad();
            }
        }

        /**
         * Test if URL is absolute or relative.
         * @private
         * @param {string} url - URL to test
         * @returns {boolean} True if absolute, else false
         */
        function absoluteURL(url) {
            // From http://stackoverflow.com/a/19709846
            return new RegExp('^(?:[a-z]+:)?//', 'i').test(url) || url[0] == '/' || url.slice(0, 5) == 'blob:';
        }

        /**
         * Create renderer and initialize event listeners once image is loaded.
         * @private
         */
        function onImageLoad() {
            if (!renderer)
                renderer = new libpannellum.renderer(renderContainer);

            // Only add event listeners once
            if (!listenersAdded) {
                listenersAdded = true;
                dragFix.addEventListener('mousedown', onDocumentMouseDown, false);
                document.addEventListener('mousemove', onDocumentMouseMove, false);
                document.addEventListener('compasschange', onDocumentCompassChange, false);
                document.addEventListener('mouseup', onDocumentMouseUp, false);
                if (config.mouseZoom) {
                    uiContainer.addEventListener('mousewheel', onDocumentMouseWheel, false);
                    uiContainer.addEventListener('DOMMouseScroll', onDocumentMouseWheel, false);
                }
                if (config.doubleClickZoom) {
                    dragFix.addEventListener('dblclick', onDocumentDoubleClick, false);
                }
                container.addEventListener('mozfullscreenchange', onFullScreenChange, false);
                container.addEventListener('webkitfullscreenchange', onFullScreenChange, false);
                container.addEventListener('msfullscreenchange', onFullScreenChange, false);
                container.addEventListener('fullscreenchange', onFullScreenChange, false);
                window.addEventListener('resize', onDocumentResize, false);
                window.addEventListener('orientationchange', onDocumentResize, false);
                if (!config.disableKeyboardCtrl) {
                    container.addEventListener('keydown', onDocumentKeyPress, false);
                    container.addEventListener('keyup', onDocumentKeyUp, false);
                    container.addEventListener('blur', clearKeys, false);
                }
                document.addEventListener('mouseleave', onDocumentMouseUp, false);
                if (document.documentElement.style.pointerAction === '' &&
                    document.documentElement.style.touchAction === '') {
                    dragFix.addEventListener('pointerdown', onDocumentPointerDown, false);
                    dragFix.addEventListener('pointermove', onDocumentPointerMove, false);
                    dragFix.addEventListener('pointerup', onDocumentPointerUp, false);
                    dragFix.addEventListener('pointerleave', onDocumentPointerUp, false);
                } else {
                    dragFix.addEventListener('touchstart', onDocumentTouchStart, false);
                    dragFix.addEventListener('touchmove', onDocumentTouchMove, false);
                    dragFix.addEventListener('touchend', onDocumentTouchEnd, false);
                }

                // Deal with MS pointer events
                if (window.navigator.pointerEnabled)
                    container.style.touchAction = 'none';
            }

            renderInit();
            setHfov(config.hfov); // possibly adapt hfov after configuration and canvas is complete; prevents empty space on top or bottom by zomming out too much
            setTimeout(function(){isTimedOut = true;}, 500);
        }

        /**
         * Parses Google Photo Sphere XMP Metadata.
         * https://developers.google.com/photo-sphere/metadata/
         * @private
         * @param {Image} image - Image to read XMP metadata from.
         */
        function parseGPanoXMP(image, url) {
            var reader = new FileReader();
            reader.addEventListener('loadend', function() {
                var img = reader.result;

                // This awful browser specific test exists because iOS 8 does not work
                // with non-progressive encoded JPEGs.
                if (navigator.userAgent.toLowerCase().match(/(iphone|ipod|ipad).* os 8_/)) {
                    var flagIndex = img.indexOf('\xff\xc2');
                    if (flagIndex < 0 || flagIndex > 65536)
                        anError(config.strings.iOS8WebGLError);
                }

                var start = img.indexOf('<x:xmpmeta');
                if (start > -1 && config.ignoreGPanoXMP !== true) {
                    var xmpData = img.substring(start, img.indexOf('</x:xmpmeta>') + 12);

                    // Extract the requested tag from the XMP data
                    var getTag = function(tag) {
                        var result;
                        if (xmpData.indexOf(tag + '="') >= 0) {
                            result = xmpData.substring(xmpData.indexOf(tag + '="') + tag.length + 2);
                            result = result.substring(0, result.indexOf('"'));
                        } else if (xmpData.indexOf(tag + '>') >= 0) {
                            result = xmpData.substring(xmpData.indexOf(tag + '>') + tag.length + 1);
                            result = result.substring(0, result.indexOf('<'));
                        }
                        if (result !== undefined) {
                            return Number(result);
                        }
                        return null;
                    };

                    // Relevant XMP data
                    var xmp = {
                        fullWidth: getTag('GPano:FullPanoWidthPixels'),
                        croppedWidth: getTag('GPano:CroppedAreaImageWidthPixels'),
                        fullHeight: getTag('GPano:FullPanoHeightPixels'),
                        croppedHeight: getTag('GPano:CroppedAreaImageHeightPixels'),
                        topPixels: getTag('GPano:CroppedAreaTopPixels'),
                        heading: getTag('GPano:PoseHeadingDegrees'),
                        horizonPitch: getTag('GPano:PosePitchDegrees'),
                        horizonRoll: getTag('GPano:PoseRollDegrees')
                    };

                    if (xmp.fullWidth !== null && xmp.croppedWidth !== null &&
                        xmp.fullHeight !== null && xmp.croppedHeight !== null &&
                        xmp.topPixels !== null) {

                        // Set up viewer using GPano XMP data
                        if (specifiedPhotoSphereExcludes.indexOf('haov') < 0)
                            config.haov = xmp.croppedWidth / xmp.fullWidth * 360;
                        if (specifiedPhotoSphereExcludes.indexOf('vaov') < 0)
                            config.vaov = xmp.croppedHeight / xmp.fullHeight * 180;
                        if (specifiedPhotoSphereExcludes.indexOf('vOffset') < 0)
                            config.vOffset = ((xmp.topPixels + xmp.croppedHeight / 2) / xmp.fullHeight - 0.5) * -180;
                        if (xmp.heading !== null && specifiedPhotoSphereExcludes.indexOf('northOffset') < 0) {
                            // TODO: make sure this works correctly for partial panoramas
                            config.northOffset = xmp.heading;
                            if (config.compass !== false) {
                                config.compass = true;
                            }
                        }
                        if (xmp.horizonPitch !== null && xmp.horizonRoll !== null) {
                            if (specifiedPhotoSphereExcludes.indexOf('horizonPitch') < 0)
                                config.horizonPitch = xmp.horizonPitch;
                            if (specifiedPhotoSphereExcludes.indexOf('horizonRoll') < 0)
                                config.horizonRoll = xmp.horizonRoll;
                        }

                        // TODO: add support for initial view settings
                    }
                }

                // Load panorama
                panoImage.src = window.URL.createObjectURL(image);
                panoImage.onerror = function() {
                    // If the image fails to load, we check the Content Security Policy
                    // headers and see if they block loading images as blobs. If they
                    // do, we load the image directly from the URL. While this should
                    // allow the image to load, it does prevent parsing of XMP data.
                    function getCspHeaders() {
                        if (!window.fetch)
                            return null;
                        return window.fetch(document.location.href)
                            .then(function(resp){
                                return resp.headers.get('Content-Security-Policy');
                            });
                    }
                    getCspHeaders().then(function(cspHeaders) {
                        if (cspHeaders) {
                            var invalidImgSource = cspHeaders.split(";").find(function(p) {
                                var matchstring = p.match(/img-src(.*)/);
                                if (matchstring) {
                                    return !matchstring[1].includes("blob");
                                }
                            });
                            if (invalidImgSource) {
                                console.log('CSP blocks blobs; reverting to URL.');
                                panoImage.crossOrigin = config.crossOrigin;
                                panoImage.src = url;
                            }
                        }
                    });
                }
            });
            if (reader.readAsBinaryString !== undefined)
                reader.readAsBinaryString(image);
            else
                reader.readAsText(image);
        }

        /**
         * Displays an error message.
         * @private
         * @param {string} errorMsg - Error message to display. If not specified, a
         *      generic WebGL error is displayed.
         */
        function anError(errorMsg) {
            if (errorMsg === undefined)
                errorMsg = config.strings.genericWebGLError;
            infoDisplay.errorMsg.innerHTML = '<p>' + errorMsg + '</p>';
            controls.load.style.display = 'none';
            infoDisplay.load.box.style.display = 'none';
            infoDisplay.errorMsg.style.display = 'table';
            error = true;
            loaded = undefined;
            renderContainer.style.display = 'none';
            fireEvent('error', errorMsg);
        }

        /**
         * Hides error message display.
         * @private
         */
        function clearError() {
            if (error) {
                infoDisplay.load.box.style.display = 'none';
                infoDisplay.errorMsg.style.display = 'none';
                error = false;
                renderContainer.style.display = 'block';
                fireEvent('errorcleared');
            }
        }

        /**
         * Displays about message.
         * @private
         * @param {MouseEvent} event - Right click location
         */
        function aboutMessage(event) {
            var pos = mousePosition(event);
            aboutMsg.style.left = pos.x + 'px';
            aboutMsg.style.top = pos.y + 'px';
            clearTimeout(aboutMessage.t1);
            clearTimeout(aboutMessage.t2);
            aboutMsg.style.display = 'block';
            aboutMsg.style.opacity = 1;
            aboutMessage.t1 = setTimeout(function() {aboutMsg.style.opacity = 0;}, 2000);
            aboutMessage.t2 = setTimeout(function() {aboutMsg.style.display = 'none';}, 2500);
            event.preventDefault();
        }

        /**
         * Calculate mouse position relative to top left of viewer container.
         * @private
         * @param {MouseEvent} event - Mouse event to use in calculation
         * @returns {Object} Calculated X and Y coordinates
         */
        function mousePosition(event) {
            var bounds = container.getBoundingClientRect();
            var pos = {};
            // pageX / pageY needed for iOS
            pos.x = (event.clientX || event.pageX) - bounds.left;
            pos.y = (event.clientY || event.pageY) - bounds.top;
            return pos;
        }

        /**
         * Event handler for mouse clicks. Initializes panning. Prints center and click
         * location coordinates when hot spot debugging is enabled.
         * @private
         * @param {MouseEvent} event - Document mouse down event.
         */
        function onDocumentMouseDown(event) {
            // Override default action
            event.preventDefault();
            // But not all of it
            container.focus();

            // Only do something if the panorama is loaded
            if (!loaded || !config.draggable) {
                return;
            }

            // Calculate mouse position relative to top left of viewer container
            var pos = mousePosition(event);

            // Log pitch / yaw of mouse click when debugging / placing hot spots
            if (config.hotSpotDebug) {
                var coords = mouseEventToCoords(event);
                console.log('Pitch: ' + coords[0] + ', Yaw: ' + coords[1] + ', Center Pitch: ' +
                    config.pitch + ', Center Yaw: ' + config.yaw + ', HFOV: ' + config.hfov);
            }

            // Turn off auto-rotation if enabled
            stopAnimation();

            stopOrientation();
            config.roll = 0;

            speed.hfov = 0;

            isUserInteracting = true;
            latestInteraction = Date.now();

            onPointerDownPointerX = pos.x;
            onPointerDownPointerY = pos.y;

            onPointerDownYaw = config.yaw;
            onPointerDownPitch = config.pitch;

            uiContainer.classList.add('pnlm-grabbing');
            uiContainer.classList.remove('pnlm-grab');

            fireEvent('mousedown', event);
            animateInit();
        }

        /**
         * Event handler for double clicks. Zooms in at clicked location
         * @private
         * @param {MouseEvent} event - Document mouse down event.
         */
        function onDocumentDoubleClick(event) {
            if (config.minHfov === config.hfov) {
                _this.setHfov(origHfov, 1000);
            } else {
                var coords = mouseEventToCoords(event);
                _this.lookAt(coords[0], coords[1], config.minHfov, 1000);
            }
        }

        /**
         * Calculate panorama pitch and yaw from location of mouse event.
         * @private
         * @param {MouseEvent} event - Document mouse down event.
         * @returns {number[]} [pitch, yaw]
         */
        function mouseEventToCoords(event) {
            var pos = mousePosition(event);
            var canvas = renderer.getCanvas();
            var canvasWidth = canvas.clientWidth,
                canvasHeight = canvas.clientHeight;
            var x = pos.x / canvasWidth * 2 - 1;
            var y = (1 - pos.y / canvasHeight * 2) * canvasHeight / canvasWidth;
            var focal = 1 / Math.tan(config.hfov * Math.PI / 360);
            var s = Math.sin(config.pitch * Math.PI / 180);
            var c = Math.cos(config.pitch * Math.PI / 180);
            var a = focal * c - y * s;
            var root = Math.sqrt(x*x + a*a);
            var pitch = Math.atan((y * c + focal * s) / root) * 180 / Math.PI;
            var yaw = Math.atan2(x / root, a / root) * 180 / Math.PI + config.yaw;
            if (yaw < -180)
                yaw += 360;
            if (yaw > 180)
                yaw -= 360;
            return [pitch, yaw];
        }

        function onDocumentCompassChange(event) {
            
        }

        /**
         * Event handler for mouse moves. Pans center of view.
         * @private
         * @param {MouseEvent} event - Document mouse move event.
         */
        function onDocumentMouseMove(event) {
            if (isUserInteracting && loaded) {
                latestInteraction = Date.now();
                var canvas = renderer.getCanvas();
                var canvasWidth = canvas.clientWidth,
                    canvasHeight = canvas.clientHeight;
                var pos = mousePosition(event);
                //TODO: This still isn't quite right
                var yaw = ((Math.atan(onPointerDownPointerX / canvasWidth * 2 - 1) - Math.atan(pos.x / canvasWidth * 2 - 1)) * 180 / Math.PI * config.hfov / 90) + onPointerDownYaw;
                speed.yaw = (yaw - config.yaw) % 360 * 0.2;
                config.yaw = yaw;

                var vfov = 2 * Math.atan(Math.tan(config.hfov/360*Math.PI) * canvasHeight / canvasWidth) * 180 / Math.PI;

                var pitch = ((Math.atan(pos.y / canvasHeight * 2 - 1) - Math.atan(onPointerDownPointerY / canvasHeight * 2 - 1)) * 180 / Math.PI * vfov / 90) + onPointerDownPitch;
                speed.pitch = (pitch - config.pitch) * 0.2;
                config.pitch = pitch;

                var mirrorData = {
                    pitch: pitch,
                    yaw: yaw
                }
                fireEvent('mousemove', mirrorData);

            }
        }

        /**
         * Event handler for mouse up events. Stops panning.
         * @private
         */
        function onDocumentMouseUp(event) {
            if (!isUserInteracting) {
                return;
            }
            isUserInteracting = false;
            if (Date.now() - latestInteraction > 15) {
                // Prevents jump when user rapidly moves mouse, stops, and then
                // releases the mouse button
                speed.pitch = speed.yaw = 0;
            }
            uiContainer.classList.add('pnlm-grab');
            uiContainer.classList.remove('pnlm-grabbing');
            latestInteraction = Date.now();

            fireEvent('mouseup', event);
        }

        /**
         * Event handler for touches. Initializes panning if one touch or zooming if
         * two touches.
         * @private
         * @param {TouchEvent} event - Document touch start event.
         */
        function onDocumentTouchStart(event) {
            // Only do something if the panorama is loaded
            if (!loaded || !config.draggable) {
                return;
            }

            // Turn off auto-rotation if enabled
            stopAnimation();

            stopOrientation();
            config.roll = 0;

            speed.hfov = 0;

            // Calculate touch position relative to top left of viewer container
            var pos0 = mousePosition(event.targetTouches[0]);

            onPointerDownPointerX = pos0.x;
            onPointerDownPointerY = pos0.y;

            if (event.targetTouches.length == 2) {
                // Down pointer is the center of the two fingers
                var pos1 = mousePosition(event.targetTouches[1]);
                onPointerDownPointerX += (pos1.x - pos0.x) * 0.5;
                onPointerDownPointerY += (pos1.y - pos0.y) * 0.5;
                onPointerDownPointerDist = Math.sqrt((pos0.x - pos1.x) * (pos0.x - pos1.x) +
                    (pos0.y - pos1.y) * (pos0.y - pos1.y));
            }
            isUserInteracting = true;
            latestInteraction = Date.now();

            onPointerDownYaw = config.yaw;
            onPointerDownPitch = config.pitch;

            fireEvent('touchstart', event);
            animateInit();
        }

        /**
         * Event handler for touch movements. Pans center of view if one touch or
         * adjusts zoom if two touches.
         * @private
         * @param {TouchEvent} event - Document touch move event.
         */
        function onDocumentTouchMove(event) {
            if (!config.draggable) {
                return;
            }

            // Override default action
            event.preventDefault();
            if (loaded) {
                latestInteraction = Date.now();
            }
            if (isUserInteracting && loaded) {
                var pos0 = mousePosition(event.targetTouches[0]);
                var clientX = pos0.x;
                var clientY = pos0.y;

                if (event.targetTouches.length == 2 && onPointerDownPointerDist != -1) {
                    var pos1 = mousePosition(event.targetTouches[1]);
                    clientX += (pos1.x - pos0.x) * 0.5;
                    clientY += (pos1.y - pos0.y) * 0.5;
                    var clientDist = Math.sqrt((pos0.x - pos1.x) * (pos0.x - pos1.x) +
                        (pos0.y - pos1.y) * (pos0.y - pos1.y));
                    setHfov(config.hfov + (onPointerDownPointerDist - clientDist) * 0.1);
                    onPointerDownPointerDist = clientDist;
                }

                // The smaller the config.hfov value (the more zoomed-in the user is), the faster
                // yaw/pitch are perceived to change on one-finger touchmove (panning) events and vice versa.
                // To improve usability at both small and large zoom levels (config.hfov values)
                // we introduce a dynamic pan speed coefficient.
                //
                // Currently this seems to *roughly* keep initial drag/pan start position close to
                // the user's finger while panning regardless of zoom level / config.hfov value.
                var touchmovePanSpeedCoeff = (config.hfov / 360) * config.touchPanSpeedCoeffFactor;

                var yaw = (onPointerDownPointerX - clientX) * touchmovePanSpeedCoeff + onPointerDownYaw;
                speed.yaw = (yaw - config.yaw) % 360 * 0.2;
                config.yaw = yaw;

                var pitch = (clientY - onPointerDownPointerY) * touchmovePanSpeedCoeff + onPointerDownPitch;
                speed.pitch = (pitch - config.pitch) * 0.2;
                config.pitch = pitch;
                var mirrorData = {
                    pitch: pitch,
                    yaw: yaw
                }
                fireEvent('touchmove', mirrorData);
            }
        }

        /**
         * Event handler for end of touches. Stops panning and/or zooming.
         * @private
         */
        function onDocumentTouchEnd() {
            isUserInteracting = false;
            if (Date.now() - latestInteraction > 150) {
                speed.pitch = speed.yaw = 0;
            }
            onPointerDownPointerDist = -1;
            latestInteraction = Date.now();

            fireEvent('touchend', event);
        }

        var pointerIDs = [],
            pointerCoordinates = [];
        /**
         * Event handler for touch starts in IE / Edge.
         * @private
         * @param {PointerEvent} event - Document pointer down event.
         */
        function onDocumentPointerDown(event) {
            if (event.pointerType == 'touch') {
                // Only do something if the panorama is loaded
                if (!loaded || !config.draggable)
                    return;
                pointerIDs.push(event.pointerId);
                pointerCoordinates.push({clientX: event.clientX, clientY: event.clientY});
                event.targetTouches = pointerCoordinates;
                onDocumentTouchStart(event);
                event.preventDefault();
            }
        }

        /**
         * Event handler for touch moves in IE / Edge.
         * @private
         * @param {PointerEvent} event - Document pointer move event.
         */
        function onDocumentPointerMove(event) {
            if (event.pointerType == 'touch') {
                if (!config.draggable)
                    return;
                for (var i = 0; i < pointerIDs.length; i++) {
                    if (event.pointerId == pointerIDs[i]) {
                        pointerCoordinates[i].clientX = event.clientX;
                        pointerCoordinates[i].clientY = event.clientY;
                        event.targetTouches = pointerCoordinates;
                        onDocumentTouchMove(event);
                        event.preventDefault();
                        return;
                    }
                }
            }
        }

        /**
         * Event handler for touch ends in IE / Edge.
         * @private
         * @param {PointerEvent} event - Document pointer up event.
         */
        function onDocumentPointerUp(event) {
            if (event.pointerType == 'touch') {
                var defined = false;
                for (var i = 0; i < pointerIDs.length; i++) {
                    if (event.pointerId == pointerIDs[i])
                        pointerIDs[i] = undefined;
                    if (pointerIDs[i])
                        defined = true;
                }
                if (!defined) {
                    pointerIDs = [];
                    pointerCoordinates = [];
                    onDocumentTouchEnd();
                }
                event.preventDefault();
            }
        }

        /**
         * Event handler for mouse wheel. Changes zoom.
         * @private
         * @param {WheelEvent} event - Document mouse wheel event.
         */
        function onDocumentMouseWheel(event) {
            // Only do something if the panorama is loaded and mouse wheel zoom is enabled
            if (!loaded || (config.mouseZoom == 'fullscreenonly' && !fullscreenActive)) {
                return;
            }

            event.preventDefault();

            // Turn off auto-rotation if enabled
            stopAnimation();
            latestInteraction = Date.now();

            if (event.wheelDeltaY) {
                // WebKit
                setHfov(config.hfov - event.wheelDeltaY * 0.05);
                speed.hfov = event.wheelDelta < 0 ? 1 : -1;
            } else if (event.wheelDelta) {
                // Opera / Explorer 9
                setHfov(config.hfov - event.wheelDelta * 0.05);
                speed.hfov = event.wheelDelta < 0 ? 1 : -1;
            } else if (event.detail) {
                // Firefox
                setHfov(config.hfov + event.detail * 1.5);
                speed.hfov = event.detail > 0 ? 1 : -1;
            }
            animateInit();
        }

        /**
         * Event handler for key presses. Updates list of currently pressed keys.
         * @private
         * @param {KeyboardEvent} event - Document key press event.
         */
        function onDocumentKeyPress(event) {
            // Turn off auto-rotation if enabled
            stopAnimation();
            latestInteraction = Date.now();

            stopOrientation();
            config.roll = 0;

            // Record key pressed
            var keynumber = event.which || event.keycode;

            // Override default action for keys that are used
            if (config.capturedKeyNumbers.indexOf(keynumber) < 0)
                return;
            event.preventDefault();

            // If escape key is pressed
            if (keynumber == 27) {
                // If in fullscreen mode
                if (fullscreenActive) {
                    toggleFullscreen();
                }
            } else {
                // Change key
                changeKey(keynumber, true);
            }
        }

        /**
         * Clears list of currently pressed keys.
         * @private
         */
        function clearKeys() {
            for (var i = 0; i < 10; i++) {
                keysDown[i] = false;
            }
        }

        /**
         * Event handler for key releases. Updates list of currently pressed keys.
         * @private
         * @param {KeyboardEvent} event - Document key up event.
         */
        function onDocumentKeyUp(event) {
            // Record key pressed
            var keynumber = event.which || event.keycode;

            // Override default action for keys that are used
            if (config.capturedKeyNumbers.indexOf(keynumber) < 0)
                return;
            event.preventDefault();

            // Change key
            changeKey(keynumber, false);
        }

        /**
         * Updates list of currently pressed keys.
         * @private
         * @param {number} keynumber - Key number.
         * @param {boolean} value - Whether or not key is pressed.
         */
        function changeKey(keynumber, value) {
            var keyChanged = false;
            switch(keynumber) {
                // If minus key is released
                case 109: case 189: case 17: case 173:
                    if (keysDown[0] != value) { keyChanged = true; }
                    keysDown[0] = value; break;

                // If plus key is released
                case 107: case 187: case 16: case 61:
                    if (keysDown[1] != value) { keyChanged = true; }
                    keysDown[1] = value; break;

                // If up arrow is released
                case 38:
                    if (keysDown[2] != value) { keyChanged = true; }
                    keysDown[2] = value; break;

                // If "w" is released
                case 87:
                    if (keysDown[6] != value) { keyChanged = true; }
                    keysDown[6] = value; break;

                // If down arrow is released
                case 40:
                    if (keysDown[3] != value) { keyChanged = true; }
                    keysDown[3] = value; break;

                // If "s" is released
                case 83:
                    if (keysDown[7] != value) { keyChanged = true; }
                    keysDown[7] = value; break;

                // If left arrow is released
                case 37:
                    if (keysDown[4] != value) { keyChanged = true; }
                    keysDown[4] = value; break;

                // If "a" is released
                case 65:
                    if (keysDown[8] != value) { keyChanged = true; }
                    keysDown[8] = value; break;

                // If right arrow is released
                case 39:
                    if (keysDown[5] != value) { keyChanged = true; }
                    keysDown[5] = value; break;

                // If "d" is released
                case 68:
                    if (keysDown[9] != value) { keyChanged = true; }
                    keysDown[9] = value;
            }

            if (keyChanged && value) {
                if (typeof performance !== 'undefined' && performance.now()) {
                    prevTime = performance.now();
                } else {
                    prevTime = Date.now();
                }
                animateInit();
            }
        }

        /**
         * Pans and/or zooms panorama based on currently pressed keys. Also handles
         * panorama "inertia" and auto rotation.
         * @private
         */
        function keyRepeat() {
            // Only do something if the panorama is loaded
            if (!loaded) {
                return;
            }

            var isKeyDown = false;

            var prevPitch = config.pitch;
            var prevYaw = config.yaw;
            var prevZoom = config.hfov;

            var newTime;
            if (typeof performance !== 'undefined' && performance.now()) {
                newTime = performance.now();
            } else {
                newTime = Date.now();
            }
            if (prevTime === undefined) {
                prevTime = newTime;
            }
            var diff = (newTime - prevTime) * config.hfov / 1700;
            diff = Math.min(diff, 1.0);

            // If minus key is down
            if (keysDown[0] && config.keyboardZoom === true) {
                setHfov(config.hfov + (speed.hfov * 0.8 + 0.5) * diff);
                isKeyDown = true;
            }

            // If plus key is down
            if (keysDown[1] && config.keyboardZoom === true) {
                setHfov(config.hfov + (speed.hfov * 0.8 - 0.2) * diff);
                isKeyDown = true;
            }

            // If up arrow or "w" is down
            if (keysDown[2] || keysDown[6]) {
                // Pan up
                config.pitch += (speed.pitch * 0.8 + 0.2) * diff;
                isKeyDown = true;
            }

            // If down arrow or "s" is down
            if (keysDown[3] || keysDown[7]) {
                // Pan down
                config.pitch += (speed.pitch * 0.8 - 0.2) * diff;
                isKeyDown = true;
            }

            // If left arrow or "a" is down
            if (keysDown[4] || keysDown[8]) {
                // Pan left
                config.yaw += (speed.yaw * 0.8 - 0.2) * diff;
                isKeyDown = true;
            }

            // If right arrow or "d" is down
            if (keysDown[5] || keysDown[9]) {
                // Pan right
                config.yaw += (speed.yaw * 0.8 + 0.2) * diff;
                isKeyDown = true;
            }

            if (isKeyDown)
                latestInteraction = Date.now();

            // If auto-rotate
            if (config.autoRotate) {
                // Pan
                if (newTime - prevTime > 0.001) {
                    var timeDiff = (newTime - prevTime) / 1000;
                    var yawDiff = (speed.yaw / timeDiff * diff - config.autoRotate * 0.2) * timeDiff;
                    yawDiff = (-config.autoRotate > 0 ? 1 : -1) * Math.min(Math.abs(config.autoRotate * timeDiff), Math.abs(yawDiff));
                    config.yaw += yawDiff;
                }

                // Deal with stopping auto rotation after a set delay
                if (config.autoRotateStopDelay) {
                    config.autoRotateStopDelay -= newTime - prevTime;
                    if (config.autoRotateStopDelay <= 0) {
                        config.autoRotateStopDelay = false;
                        autoRotateSpeed = config.autoRotate;
                        config.autoRotate = 0;
                    }
                }
            }

            // Animated moves
            if (animatedMove.pitch) {
                animateMove('pitch');
                prevPitch = config.pitch;
            }
            if (animatedMove.yaw) {
                animateMove('yaw');
                prevYaw = config.yaw;
            }
            if (animatedMove.hfov) {
                animateMove('hfov');
                prevZoom = config.hfov;
            }

            // "Inertia"
            if (diff > 0 && !config.autoRotate) {
                // "Friction"
                var slowDownFactor = 1 - config.friction;

                // Yaw
                if (!keysDown[4] && !keysDown[5] && !keysDown[8] && !keysDown[9] && !animatedMove.yaw) {
                    config.yaw += speed.yaw * diff * slowDownFactor;
                }
                // Pitch
                if (!keysDown[2] && !keysDown[3] && !keysDown[6] && !keysDown[7] && !animatedMove.pitch) {
                    config.pitch += speed.pitch * diff * slowDownFactor;
                }
                // Zoom
                if (!keysDown[0] && !keysDown[1] && !animatedMove.hfov) {
                    setHfov(config.hfov + speed.hfov * diff * slowDownFactor);
                }
            }

            prevTime = newTime;
            if (diff > 0) {
                speed.yaw = speed.yaw * 0.8 + (config.yaw - prevYaw) / diff * 0.2;
                speed.pitch = speed.pitch * 0.8 + (config.pitch - prevPitch) / diff * 0.2;
                speed.hfov = speed.hfov * 0.8 + (config.hfov - prevZoom) / diff * 0.2;

                // Limit speed
                var maxSpeed = config.autoRotate ? Math.abs(config.autoRotate) : 5;
                speed.yaw = Math.min(maxSpeed, Math.max(speed.yaw, -maxSpeed));
                speed.pitch = Math.min(maxSpeed, Math.max(speed.pitch, -maxSpeed));
                speed.hfov = Math.min(maxSpeed, Math.max(speed.hfov, -maxSpeed));
            }

            // Stop movement if opposite controls are pressed
            if (keysDown[0] && keysDown[1]) {
                speed.hfov = 0;
            }
            if ((keysDown[2] || keysDown[6]) && (keysDown[3] || keysDown[7])) {
                speed.pitch = 0;
            }
            if ((keysDown[4] || keysDown[8]) && (keysDown[5] || keysDown[9])) {
                speed.yaw = 0;
            }
        }

        /**
         * Animates moves.
         * @param {string} axis - Axis to animate
         * @private
         */
        function animateMove(axis) {
            var t = animatedMove[axis];
            var normTime = Math.min(1, Math.max((Date.now() - t.startTime) / 1000 / (t.duration / 1000), 0));
            var result = t.startPosition + config.animationTimingFunction(normTime) * (t.endPosition - t.startPosition);
            if ((t.endPosition > t.startPosition && result >= t.endPosition) ||
                (t.endPosition < t.startPosition && result <= t.endPosition) ||
                t.endPosition === t.startPosition) {
                result = t.endPosition;
                speed[axis] = 0;
                delete animatedMove[axis];
            }
            config[axis] = result;
        }

        /**
         * @param {number} t - Normalized time in animation
         * @return {number} Position in animation
         * @private
         */
        function timingFunction(t) {
            // easeInOutQuad from https://gist.github.com/gre/1650294
            return t < 0.5 ? 2*t*t : -1+(4-2*t)*t;
        }

        /**
         * Event handler for document resizes. Updates viewer size and rerenders view.
         * @private
         */
        function onDocumentResize() {
            // Resize panorama renderer (moved to onFullScreenChange)
            //renderer.resize();
            //animateInit();

            // Kludge to deal with WebKit regression: https://bugs.webkit.org/show_bug.cgi?id=93525
            onFullScreenChange('resize');
        }

        /**
         * Initializes animation.
         * @private
         */
        function animateInit() {
            if (animating) {
                return;
            }
            animating = true;
            animate();
        }

        /**
         * Animates view, using requestAnimationFrame to trigger rendering.
         * @private
         */
        function animate() {
            if (destroyed) {
                return;
            }

            render();
            if (autoRotateStart)
                clearTimeout(autoRotateStart);
            if (isUserInteracting || orientation === true) {
                requestAnimationFrame(animate);
            } else if (keysDown[0] || keysDown[1] || keysDown[2] || keysDown[3] ||
                keysDown[4] || keysDown[5] || keysDown[6] || keysDown[7] ||
                keysDown[8] || keysDown[9] || config.autoRotate ||
                animatedMove.pitch || animatedMove.yaw || animatedMove.hfov ||
                Math.abs(speed.yaw) > 0.01 || Math.abs(speed.pitch) > 0.01 ||
                Math.abs(speed.hfov) > 0.01) {

                keyRepeat();
                if (config.autoRotateInactivityDelay >= 0 && autoRotateSpeed &&
                    Date.now() - latestInteraction > config.autoRotateInactivityDelay &&
                    !config.autoRotate) {
                    config.autoRotate = autoRotateSpeed;
                    _this.lookAt(origPitch, undefined, origHfov, 3000);
                }
                requestAnimationFrame(animate);
            } else if (renderer && (renderer.isLoading() || (config.dynamic === true && update))) {
                requestAnimationFrame(animate);
            } else {
                fireEvent('animatefinished', {pitch: _this.getPitch(), yaw: _this.getYaw(), hfov: _this.getHfov()});
                animating = false;
                prevTime = undefined;
                var autoRotateStartTime = config.autoRotateInactivityDelay -
                    (Date.now() - latestInteraction);
                if (autoRotateStartTime > 0) {
                    autoRotateStart = setTimeout(function() {
                        config.autoRotate = autoRotateSpeed;
                        _this.lookAt(origPitch, undefined, origHfov, 3000);
                        animateInit();
                    }, autoRotateStartTime);
                } else if (config.autoRotateInactivityDelay >= 0 && autoRotateSpeed) {
                    config.autoRotate = autoRotateSpeed;
                    _this.lookAt(origPitch, undefined, origHfov, 3000);
                    animateInit();
                }
            }
        }

        /**
         * Renders panorama view.
         * @private
         */
        function render() {
            var tmpyaw;

            if (loaded) {
                var canvas = renderer.getCanvas();

                if (config.autoRotate !== false) {
                    // When auto-rotating this check needs to happen first (see issue #764)
                    if (config.yaw > 360) {
                        config.yaw -= 360;
                    } else if (config.yaw < -360) {
                        config.yaw += 360;
                    }
                }

                // Keep a tmp value of yaw for autoRotate comparison later
                tmpyaw = config.yaw;

                // Optionally avoid showing background (empty space) on left or right by adapting min/max yaw
                var hoffcut = 0,
                    voffcut = 0;
                if (config.avoidShowingBackground) {
                    var hfov2 = config.hfov / 2,
                        vfov2 = Math.atan2(Math.tan(hfov2 / 180 * Math.PI), (canvas.width / canvas.height)) * 180 / Math.PI,
                        transposed = config.vaov > config.haov;
                    if (transposed) {
                        voffcut = vfov2 * (1 - Math.min(Math.cos((config.pitch - hfov2) / 180 * Math.PI),
                            Math.cos((config.pitch + hfov2) / 180 * Math.PI)));
                    } else {
                        hoffcut = hfov2 * (1 - Math.min(Math.cos((config.pitch - vfov2) / 180 * Math.PI),
                            Math.cos((config.pitch + vfov2) / 180 * Math.PI)));
                    }
                }

                // Ensure the yaw is within min and max allowed
                var yawRange = config.maxYaw - config.minYaw,
                    minYaw = -180,
                    maxYaw = 180;
                if (yawRange < 360) {
                    minYaw = config.minYaw + config.hfov / 2 + hoffcut;
                    maxYaw = config.maxYaw - config.hfov / 2 - hoffcut;
                    if (yawRange < config.hfov) {
                        // Lock yaw to average of min and max yaw when both can be seen at once
                        minYaw = maxYaw = (minYaw + maxYaw) / 2;
                    }
                    config.yaw = Math.max(minYaw, Math.min(maxYaw, config.yaw));
                }

                if (!(config.autoRotate !== false)) {
                    // When not auto-rotating, this check needs to happen after the
                    // previous check (see issue #698)
                    if (config.yaw > 360) {
                        config.yaw -= 360;
                    } else if (config.yaw < -360) {
                        config.yaw += 360;
                    }
                }

                // Check if we autoRotate in a limited by min and max yaw
                // If so reverse direction
                if (config.autoRotate !== false && tmpyaw != config.yaw &&
                    prevTime !== undefined) { // this condition prevents changing the direction initially
                    config.autoRotate *= -1;
                }

                // Ensure the calculated pitch is within min and max allowed
                var vfov = 2 * Math.atan(Math.tan(config.hfov / 180 * Math.PI * 0.5) /
                    (canvas.width / canvas.height)) / Math.PI * 180;
                var minPitch = config.minPitch + vfov / 2,
                    maxPitch = config.maxPitch - vfov / 2;
                var pitchRange = config.maxPitch - config.minPitch;
                if (pitchRange < vfov) {
                    // Lock pitch to average of min and max pitch when both can be seen at once
                    minPitch = maxPitch = (minPitch + maxPitch) / 2;
                }
                if (isNaN(minPitch))
                    minPitch = -90;
                if (isNaN(maxPitch))
                    maxPitch = 90;
                config.pitch = Math.max(minPitch, Math.min(maxPitch, config.pitch));

                renderer.render(config.pitch * Math.PI / 180, config.yaw * Math.PI / 180, config.hfov * Math.PI / 180, {roll: config.roll * Math.PI / 180});

                renderHotSpots();

                // Update compass
                //compass data fired by sakib
                // const node = document.getElementsByClassName('add-pulse')[0];
                // if(node) {
                //     node.style.transform = 'rotate(' + (-config.yaw - config.northOffset) + 'deg)';
                // }
                if (config.compass) {
                    compass.style.transform = 'rotate(' + (-config.yaw - config.northOffset) + 'deg)';
                    compass.style.webkitTransform = 'rotate(' + (-config.yaw - config.northOffset) + 'deg)';
                }
            }
        }

        /**
         * Creates a new quaternion.
         * @private
         * @constructor
         * @param {Number} w - W value
         * @param {Number} x - X value
         * @param {Number} y - Y value
         * @param {Number} z - Z value
         */
        function Quaternion(w, x, y, z) {
            this.w = w;
            this.x = x;
            this.y = y;
            this.z = z;
        }

        /**
         * Multiplies quaternions.
         * @private
         * @param {Quaternion} q - Quaternion to multiply
         * @returns {Quaternion} Result of multiplication
         */
        Quaternion.prototype.multiply = function(q) {
            return new Quaternion(this.w*q.w - this.x*q.x - this.y*q.y - this.z*q.z,
                this.x*q.w + this.w*q.x + this.y*q.z - this.z*q.y,
                this.y*q.w + this.w*q.y + this.z*q.x - this.x*q.z,
                this.z*q.w + this.w*q.z + this.x*q.y - this.y*q.x);
        };

        /**
         * Converts quaternion to Euler angles.
         * @private
         * @returns {Number[]} [phi angle, theta angle, psi angle]
         */
        Quaternion.prototype.toEulerAngles = function() {
            var phi = Math.atan2(2 * (this.w * this.x + this.y * this.z),
                    1 - 2 * (this.x * this.x + this.y * this.y)),
                theta = Math.asin(2 * (this.w * this.y - this.z * this.x)),
                psi = Math.atan2(2 * (this.w * this.z + this.x * this.y),
                    1 - 2 * (this.y * this.y + this.z * this.z));
            return [phi, theta, psi];
        };

        /**
         * Converts device orientation API Tait-Bryan angles to a quaternion.
         * @private
         * @param {Number} alpha - Alpha angle (in degrees)
         * @param {Number} beta - Beta angle (in degrees)
         * @param {Number} gamma - Gamma angle (in degrees)
         * @returns {Quaternion} Orientation quaternion
         */
        function taitBryanToQuaternion(alpha, beta, gamma) {
            var r = [beta ? beta * Math.PI / 180 / 2 : 0,
                gamma ? gamma * Math.PI / 180 / 2 : 0,
                alpha ? alpha * Math.PI / 180 / 2 : 0];
            var c = [Math.cos(r[0]), Math.cos(r[1]), Math.cos(r[2])],
                s = [Math.sin(r[0]), Math.sin(r[1]), Math.sin(r[2])];

            return new Quaternion(c[0]*c[1]*c[2] - s[0]*s[1]*s[2],
                s[0]*c[1]*c[2] - c[0]*s[1]*s[2],
                c[0]*s[1]*c[2] + s[0]*c[1]*s[2],
                c[0]*c[1]*s[2] + s[0]*s[1]*c[2]);
        }

        /**
         * Computes current device orientation quaternion from device orientation API
         * Tait-Bryan angles.
         * @private
         * @param {Number} alpha - Alpha angle (in degrees)
         * @param {Number} beta - Beta angle (in degrees)
         * @param {Number} gamma - Gamma angle (in degrees)
         * @returns {Quaternion} Orientation quaternion
         */
        function computeQuaternion(alpha, beta, gamma) {
            // Convert Tait-Bryan angles to quaternion
            var quaternion = taitBryanToQuaternion(alpha, beta, gamma);
            // Apply world transform
            quaternion = quaternion.multiply(new Quaternion(Math.sqrt(0.5), -Math.sqrt(0.5), 0, 0));
            // Apply screen transform
            var angle = window.orientation ? -window.orientation * Math.PI / 180 / 2 : 0;
            return quaternion.multiply(new Quaternion(Math.cos(angle), 0, -Math.sin(angle), 0));
        }

        /**
         * Event handler for device orientation API. Controls pointing.
         * @private
         * @param {DeviceOrientationEvent} event - Device orientation event.
         */
        function orientationListener(e) {
            var q = computeQuaternion(e.alpha, e.beta, e.gamma).toEulerAngles();
            if (typeof(orientation) == 'number' && orientation < 10) {
                // This kludge is necessary because iOS sometimes provides a few stale
                // device orientation events when the listener is removed and then
                // readded. Thus, we skip the first 10 events to prevent this from
                // causing problems.
                orientation += 1;
            } else if (orientation === 10) {
                // Record starting yaw to prevent jumping
                orientationYawOffset = q[2] / Math.PI * 180 + config.yaw;
                orientation = true;
                requestAnimationFrame(animate);
            } else {
                config.pitch = q[0] / Math.PI * 180;
                config.roll = -q[1] / Math.PI * 180;
                config.yaw = -q[2] / Math.PI * 180 + orientationYawOffset;
            }
        }

        /**
         * Initializes renderer.
         * @private
         */
        function renderInit() {
            try {
                var params = {};
                if (config.horizonPitch !== undefined)
                    params.horizonPitch = config.horizonPitch * Math.PI / 180;
                if (config.horizonRoll !== undefined)
                    params.horizonRoll = config.horizonRoll * Math.PI / 180;
                if (config.backgroundColor !== undefined)
                    params.backgroundColor = config.backgroundColor;
                renderer.init(panoImage, config.type, config.dynamic, config.haov * Math.PI / 180, config.vaov * Math.PI / 180, config.vOffset * Math.PI / 180, renderInitCallback, params);
                if (config.dynamic !== true) {
                    // Allow image to be garbage collected
                    panoImage = undefined;
                }
            } catch(event) {
                // Panorama not loaded

                // Display error if there is a bad texture
                if (event.type == 'webgl error' || event.type == 'no webgl') {
                    anError();
                } else if (event.type == 'webgl size error') {
                    anError(config.strings.textureSizeError.replace('%s', event.width).replace('%s', event.maxWidth));
                } else {
                    anError(config.strings.unknownError);
                    throw event;
                }
            }
        }

        /**
         * Triggered when render initialization finishes. Handles fading between
         * scenes as well as showing the compass and hotspots and hiding the loading
         * display.
         * @private
         */
        function renderInitCallback() {
            // Fade if specified
            if (config.sceneFadeDuration && renderer.fadeImg !== undefined) {
                renderer.fadeImg.style.opacity = 0;
                // Remove image
                var fadeImg = renderer.fadeImg;
                delete renderer.fadeImg;
                setTimeout(function() {
                    renderContainer.removeChild(fadeImg);
                    fireEvent('scenechangefadedone');
                }, config.sceneFadeDuration);
            }

            // Show compass if applicable
            if (config.compass) {
                compass.style.display = 'inline';
            } else {
                compass.style.display = 'none';
            }

            // Show hotspots
            createHotSpots();

            // Hide loading display
            infoDisplay.load.box.style.display = 'none';
            if (preview !== undefined) {
                renderContainer.removeChild(preview);
                preview = undefined;
            }
            loaded = true;

            animateInit();

            fireEvent('load');
        }

        /**
         * Creates hot spot element for the current scene.
         * @private
         * @param {Object} hs - The configuration for the hotspot
         */
        function createHotSpot(hs) {
            // Make sure hot spot pitch and yaw are numbers
            hs.pitch = Number(hs.pitch) || 0;
            hs.yaw = Number(hs.yaw) || 0;

            var div = document.createElement('div');
            div.className = 'pnlm-hotspot-base';
            if (hs.cssClass)
                div.className += ' ' + hs.cssClass;
            else
                div.className += ' pnlm-hotspot pnlm-sprite pnlm-' + escapeHTML(hs.type);

            //Shahin - customized hotspot dom for Hexagon shape
            if(hs.hotspot_shape === 'hexagon'){
                var hotspotShape = document.createElement('div');
                hotspotShape.className = 'hexagon-wrapper';
                const hexagonShapeIcon = '<svg fill="none" width="30" height="25" viewBox="0 0 40 35" xmlns="http://www.w3.org/2000/svg"><path fill="#00b4ff" d="M0 17.32L10 0h20l10 17.32-10 17.321H10L0 17.321z"/></svg>';
                hotspotShape.innerHTML = hexagonShapeIcon;
                div.appendChild(hotspotShape);
            }
            //Sakib - customized hotspot dom for vr mode
            var title = document.createElement('span');
            title.className = 'vr-mode-title';
            if (hs.sceneId)
                title.innerHTML = escapeHTML(hs.sceneId);
            //Sakib - customized hotspot dom for vr mode end

            var span = document.createElement('span');
            if (hs.text)
                span.innerHTML = escapeHTML(hs.text);

            var a;
            if (hs.video) {
                var video = document.createElement('video'),
                    vidp = hs.video;
                if (config.basePath && !absoluteURL(vidp))
                    vidp = config.basePath + vidp;
                video.src = sanitizeURL(vidp);
                video.controls = true;
                video.style.width = hs.width + 'px';
                renderContainer.appendChild(div);
                span.appendChild(video);
            } else if (hs.image) {
                var imgp = hs.image;
                if (config.basePath && !absoluteURL(imgp))
                    imgp = config.basePath + imgp;
                a = document.createElement('a');
                a.href = sanitizeURL(hs.URL ? hs.URL : imgp, true);
                a.target = '_blank';
                span.appendChild(a);
                var image = document.createElement('img');
                image.src = sanitizeURL(imgp);
                image.style.width = hs.width + 'px';
                image.style.paddingTop = '5px';
                renderContainer.appendChild(div);
                a.appendChild(image);
                span.style.maxWidth = 'initial';
            } else if (hs.URL) {
                a = document.createElement('a');
                a.href = sanitizeURL(hs.URL, true);
                if (hs.attributes) {
                    for (var key in hs.attributes) {
                        a.setAttribute(key, hs.attributes[key]);
                    }
                } else {
                    //wpvr edit by sakib for in tab url open// -- handling from here
                    if (hs.wpvr_url_open == 'on') {
                        a.target = '_self';
                    }
                    else {
                        a.target = '_blank';
                    }
                }
                renderContainer.appendChild(a);
                div.className += ' pnlm-pointer';
                span.className += ' pnlm-pointer';
                a.appendChild(div);
            } else {
                if (hs.sceneId) {
                    div.onclick = div.ontouchend = function() {
                        if (!div.clicked) {
                            div.clicked = true;
                            loadScene(hs.sceneId, hs.targetPitch, hs.targetYaw, hs.targetHfov);
                        }
                        return false;
                    };
                    div.className += ' pnlm-pointer';
                    span.className += ' pnlm-pointer';
                }

                if (hs.sceneId)
                    div.appendChild(title);

                renderContainer.appendChild(div);
            }

            if (hs.createTooltipFunc) {
                hs.createTooltipFunc(div, hs.createTooltipArgs);
            } else if (hs.text || hs.video || hs.image) {
                div.classList.add('pnlm-tooltip');
                div.appendChild(span);
                span.style.width = span.scrollWidth - 20 + 'px';
                span.style.marginLeft = -(span.scrollWidth - div.offsetWidth) / 2 + 'px';
                span.style.marginTop = -span.scrollHeight - 12 + 'px';
            }
            if (hs.clickHandlerFunc) {
                div.addEventListener('click', function(e) {
                    hs.clickHandlerFunc(e, hs.clickHandlerArgs);
                }, 'false');
                div.className += ' pnlm-pointer';
                span.className += ' pnlm-pointer';
            }
            hs.div = div;
        }

        /**
         * Creates hot spot elements for the current scene.
         * @private
         */
        function createHotSpots() {
            if (hotspotsCreated) return;

            if (!config.hotSpots) {
                config.hotSpots = [];
            } else {
                // Sort by pitch so tooltip is never obscured by another hot spot
                config.hotSpots = config.hotSpots.sort(function(a, b) {
                    return a.pitch < b.pitch;
                });
                config.hotSpots.forEach(createHotSpot);
            }
            hotspotsCreated = true;
            renderHotSpots();
        }

        /**
         * Destroys currently created hot spot elements.
         * @private
         */
        function destroyHotSpots() {
            var hs = config.hotSpots;
            hotspotsCreated = false;
            delete config.hotSpots;
            if (hs) {
                for (var i = 0; i < hs.length; i++) {
                    var current = hs[i].div;
                    if (current) {
                        while (current.parentNode && current.parentNode != renderContainer) {
                            current = current.parentNode;
                        }
                        renderContainer.removeChild(current);
                    }
                    delete hs[i].div;
                }
            }
        }

        /**
         * Renders hot spot, updating its position and visibility.
         * @private
         */
        function renderHotSpot(hs) {
            var hsPitchSin = Math.sin(hs.pitch * Math.PI / 180),
                hsPitchCos = Math.cos(hs.pitch * Math.PI / 180),
                configPitchSin = Math.sin(config.pitch * Math.PI / 180),
                configPitchCos = Math.cos(config.pitch * Math.PI / 180),
                yawCos = Math.cos((-hs.yaw + config.yaw) * Math.PI / 180);
            var z = hsPitchSin * configPitchSin + hsPitchCos * yawCos * configPitchCos;
            if ((hs.yaw <= 90 && hs.yaw > -90 && z <= 0) ||
                ((hs.yaw > 90 || hs.yaw <= -90) && z <= 0)) {
                hs.div.style.visibility = 'hidden';
            } else {
                var yawSin = Math.sin((-hs.yaw + config.yaw) * Math.PI / 180),
                    hfovTan = Math.tan(config.hfov * Math.PI / 360);
                hs.div.style.visibility = 'visible';
                // Subpixel rendering doesn't work in Firefox
                // https://bugzilla.mozilla.org/show_bug.cgi?id=739176
                var canvas = renderer.getCanvas(),
                    canvasWidth = canvas.clientWidth,
                    canvasHeight = canvas.clientHeight;
                var coord = [-canvasWidth / hfovTan * yawSin * hsPitchCos / z / 2,
                    -canvasWidth / hfovTan * (hsPitchSin * configPitchCos -
                        hsPitchCos * yawCos * configPitchSin) / z / 2];
                // Apply roll
                var rollSin = Math.sin(config.roll * Math.PI / 180),
                    rollCos = Math.cos(config.roll * Math.PI / 180);
                coord = [coord[0] * rollCos - coord[1] * rollSin,
                    coord[0] * rollSin + coord[1] * rollCos];
                // Apply transform
                coord[0] += (canvasWidth - hs.div.offsetWidth) / 2;
                coord[1] += (canvasHeight - hs.div.offsetHeight) / 2;
                var transform = 'translate(' + coord[0] + 'px, ' + coord[1] +
                    'px) translateZ(9999px) rotate(' + config.roll + 'deg)';
                if (hs.scale) {
                    transform += ' scale(' + (origHfov/config.hfov) / z + ')';
                }
                hs.div.style.webkitTransform = transform;
                hs.div.style.MozTransform = transform;
                hs.div.style.transform = transform;
            }
        }

        /**
         * Renders hot spots, updating their positions and visibility.
         * @private
         */
        function renderHotSpots() {
            config.hotSpots.forEach(renderHotSpot);
        }

        /**
         * Merges a scene configuration into the current configuration.
         * @private
         * @param {string} sceneId - Identifier of scene configuration to merge in.
         */
        function mergeConfig(sceneId) {
            config = {};
            var k, s;
            var photoSphereExcludes = ['haov', 'vaov', 'vOffset', 'northOffset', 'horizonPitch', 'horizonRoll'];
            specifiedPhotoSphereExcludes = [];

            // Merge default config
            for (k in defaultConfig) {
                if (defaultConfig.hasOwnProperty(k)) {
                    config[k] = defaultConfig[k];
                }
            }

            // Merge default scene config
            for (k in initialConfig.default) {
                if (initialConfig.default.hasOwnProperty(k)) {
                    if (k == 'strings') {
                        for (s in initialConfig.default.strings) {
                            if (initialConfig.default.strings.hasOwnProperty(s)) {
                                config.strings[s] = escapeHTML(initialConfig.default.strings[s]);
                            }
                        }
                    } else {
                        config[k] = initialConfig.default[k];
                        if (photoSphereExcludes.indexOf(k) >= 0) {
                            specifiedPhotoSphereExcludes.push(k);
                        }
                    }
                }
            }

            // Merge current scene config
            if ((sceneId !== null) && (sceneId !== '') && (initialConfig.scenes) && (initialConfig.scenes[sceneId])) {
                var scene = initialConfig.scenes[sceneId];
                for (k in scene) {
                    if (scene.hasOwnProperty(k)) {
                        if (k == 'strings') {
                            for (s in scene.strings) {
                                if (scene.strings.hasOwnProperty(s)) {
                                    config.strings[s] = escapeHTML(scene.strings[s]);
                                }
                            }
                        } else {
                            config[k] = scene[k];
                            if (photoSphereExcludes.indexOf(k) >= 0) {
                                specifiedPhotoSphereExcludes.push(k);
                            }
                        }
                    }
                }
                config.scene = sceneId;
            }

            // Merge initial config
            for (k in initialConfig) {
                if (initialConfig.hasOwnProperty(k)) {
                    if (k == 'strings') {
                        for (s in initialConfig.strings) {
                            if (initialConfig.strings.hasOwnProperty(s)) {
                                config.strings[s] = escapeHTML(initialConfig.strings[s]);
                            }
                        }
                    } else {
                        config[k] = initialConfig[k];
                        if (photoSphereExcludes.indexOf(k) >= 0) {
                            specifiedPhotoSphereExcludes.push(k);
                        }
                    }
                }
            }
        }

        /**
         * Processes configuration options.
         * @param {boolean} [isPreview] - Whether or not the preview is being displayed
         * @private
         */
        function processOptions(isPreview) {
            isPreview = isPreview ? isPreview : false;

            // Process preview first so it always loads before the browser hits its
            // maximum number of connections to a server as can happen with cubic
            // panoramas
            if (isPreview && 'preview' in config) {
                var p = config.preview;
                if (config.basePath && !absoluteURL(p))
                    p = config.basePath + p;
                preview = document.createElement('div');
                preview.className = 'pnlm-preview-img';
                preview.style.backgroundImage = "url('" + sanitizeURLForCss(p) + "')";
                renderContainer.appendChild(preview);
            }

            // Handle different preview values
            var title = config.title,
                author = config.author;
            if (isPreview) {
                if ('previewTitle' in config)
                    config.title = config.previewTitle;
                if ('previewAuthor' in config)
                    config.author = config.previewAuthor;
            }

            // Reset title / author display
            if (!config.hasOwnProperty('title'))
                infoDisplay.title.innerHTML = '';
            if (!config.hasOwnProperty('author'))
                infoDisplay.author.innerHTML = '';
            if (!config.hasOwnProperty('title') && !config.hasOwnProperty('author'))
                infoDisplay.container.style.display = 'none';

            // Fill in load button label and loading box text
            controls.load.innerHTML = '<p>' + config.strings.loadButtonLabel + '</p>';
            infoDisplay.load.boxp.innerHTML = config.strings.loadingLabel;

            // Process other options
            for (var key in config) {
                if (config.hasOwnProperty(key)) {
                    switch(key) {
                        case 'title':
                            infoDisplay.title.innerHTML = escapeHTML(config[key]);
                            infoDisplay.container.style.display = 'inline';
                            break;

                        case 'author':
                            var authorText = escapeHTML(config[key]);
                            if (config.authorURL) {
                                var authorLink = document.createElement('a');
                                authorLink.href = sanitizeURL(config['authorURL'], true);
                                authorLink.target = '_blank';
                                authorLink.innerHTML = escapeHTML(config[key]);
                                authorText = authorLink.outerHTML;
                            }
                            infoDisplay.author.innerHTML = config.strings.bylineLabel.replace('%s', authorText);
                            infoDisplay.container.style.display = 'inline';
                            break;

                        case 'fallback':
                            var link = document.createElement('a');
                            link.href = sanitizeURL(config[key], true);
                            link.target = '_blank';
                            link.textContent = 'Click here to view this panorama in an alternative viewer.';
                            var message = document.createElement('p');
                            message.textContent = 'Your browser does not support WebGL.';
                            message.appendChild(document.createElement('br'));
                            message.appendChild(link);
                            infoDisplay.errorMsg.innerHTML = ''; // Removes all children nodes
                            infoDisplay.errorMsg.appendChild(message);
                            break;

                        case 'hfov':
                            setHfov(Number(config[key]));
                            break;

                        case 'autoLoad':
                            if (config[key] === true && renderer === undefined) {
                                // Show loading box
                                infoDisplay.load.box.style.display = 'inline';
                                // Hide load button
                                controls.load.style.display = 'none';
                                // Initialize
                                init();
                            }
                            break;

                        case 'showZoomCtrl':
                            if (config[key] && config.showControls != false) {
                                // Show zoom controls
                                controls.zoom.style.display = 'block';
                            } else {
                                // Hide zoom controls
                                controls.zoom.style.display = 'none';
                            }
                            break;

                        case 'showFullscreenCtrl':
                            if (config[key] && config.showControls != false && ('fullscreen' in document || 'mozFullScreen' in document ||
                                'webkitIsFullScreen' in document || 'msFullscreenElement' in document)) {

                                // Show fullscreen control
                                controls.fullscreen.style.display = 'block';
                            } else {
                                // Hide fullscreen control
                                controls.fullscreen.style.display = 'none';
                            }
                            break;

                        case 'hotSpotDebug':
                            if (config[key])
                                hotSpotDebugIndicator.style.display = 'block';
                            else
                                hotSpotDebugIndicator.style.display = 'none';
                            break;

                        case 'showControls':
                            if (!config[key]) {
                                controls.orientation.style.display = 'none';
                                controls.zoom.style.display = 'none';
                                controls.fullscreen.style.display = 'none';
                            }
                            break;

                        case 'orientationOnByDefault':
                            if (config[key])
                                startOrientation();
                            break;
                    }
                }
            }

            if (isPreview) {
                // Restore original values if changed for preview
                if (title)
                    config.title = title;
                else
                    delete config.title;
                if (author)
                    config.author = author;
                else
                    delete config.author;
            }
        }

        /**
         * Toggles fullscreen mode.
         * @private
         */
        function toggleFullscreen() {
            if (loaded && !error) {
                if (!fullscreenActive) {
                    try {
                        if (container.requestFullscreen) {
                            container.requestFullscreen();
                        } else if (container.mozRequestFullScreen) {
                            container.mozRequestFullScreen();
                        } else if (container.msRequestFullscreen) {
                            container.msRequestFullscreen();
                        } else {
                            container.webkitRequestFullScreen();
                        }
                    } catch(event) {
                        // Fullscreen doesn't work
                    }
                } else {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if (document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if (document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if (document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                }
            }
        }

        /**
         * Event handler for fullscreen changes.
         * @private
         */
        function onFullScreenChange(resize) {
            if (document.fullscreenElement || document.fullscreen || document.mozFullScreen || document.webkitIsFullScreen || document.msFullscreenElement) {
                controls.fullscreen.classList.add('pnlm-fullscreen-toggle-button-active');
                fullscreenActive = true;
            } else {
                controls.fullscreen.classList.remove('pnlm-fullscreen-toggle-button-active');
                fullscreenActive = false;
            }
            if (resize !== 'resize')
                fireEvent('fullscreenchange', fullscreenActive);
            // Resize renderer (deal with browser quirks and fixes #155)
            renderer.resize();
            setHfov(config.hfov);
            animateInit();
        }

        /**
         * Increases panorama zoom. For use with zoom button.
         * @private
         */
        function zoomIn() {
            if (loaded) {
                setHfov(config.hfov - 5);
                animateInit();
            }
        }

        /**
         * Decreases panorama zoom. For use with zoom button.
         * @private
         */
        function zoomOut() {
            if (loaded) {
                setHfov(config.hfov + 5);
                animateInit();
            }
        }

        /**
         * Clamps horzontal field of view to viewer's limits.
         * @private
         * @param {number} hfov - Input horizontal field of view (in degrees)
         * @return {number} - Clamped horizontal field of view (in degrees)
         */
        function constrainHfov(hfov) {
            // Keep field of view within bounds
            var minHfov = config.minHfov;
            if (config.type == 'multires' && renderer && !config.multiResMinHfov) {
                minHfov = Math.min(minHfov, renderer.getCanvas().width / (config.multiRes.cubeResolution / 90 * 0.9));
            }
            if (minHfov > config.maxHfov) {
                // Don't change view if bounds don't make sense
                console.log('HFOV bounds do not make sense (minHfov > maxHfov).');
                return config.hfov;
            }
            var newHfov = config.hfov;
            if (hfov < minHfov) {
                newHfov = minHfov;
            } else if (hfov > config.maxHfov) {
                newHfov = config.maxHfov;
            } else {
                newHfov = hfov;
            }
            // Optionally avoid showing background (empty space) on top or bottom by adapting newHfov
            if (config.avoidShowingBackground && renderer) {
                var canvas = renderer.getCanvas();
                newHfov = Math.min(newHfov,
                    Math.atan(Math.tan((config.maxPitch - config.minPitch) / 360 * Math.PI) /
                        canvas.height * canvas.width) * 360 / Math.PI);
            }
            return newHfov;
        }

        /**
         * Sets viewer's horizontal field of view.
         * @private
         * @param {number} hfov - Desired horizontal field of view in degrees.
         */
        function setHfov(hfov) {
            config.hfov = constrainHfov(hfov);
            fireEvent('zoomchange', config.hfov);
        }

        /**
         * Stops auto rotation and animated moves.
         * @private
         */
        function stopAnimation() {
            animatedMove = {};
            autoRotateSpeed = config.autoRotate ? config.autoRotate : autoRotateSpeed;
            config.autoRotate = false;
        }

        /**
         * Loads panorama.
         * @private
         */
        function load() {
            // Since WebGL error handling is very general, first we clear any error box
            // since it is a new scene and the error from previous maybe because of lacking
            // memory etc and not because of a lack of WebGL support etc
            clearError();
            loaded = false;

            controls.load.style.display = 'none';
            infoDisplay.load.box.style.display = 'inline';
            init();
        }

        /**
         * Loads scene.
         * @private
         * @param {string} sceneId - Identifier of scene configuration to merge in.
         * @param {number} targetPitch - Pitch viewer should be centered on once scene loads.
         * @param {number} targetYaw - Yaw viewer should be centered on once scene loads.
         * @param {number} targetHfov - HFOV viewer should use once scene loads.
         * @param {boolean} [fadeDone] - If `true`, fade setup is skipped.
         */
        function loadScene(sceneId, targetPitch, targetYaw, targetHfov, fadeDone) {
            if (!loaded)
                fadeDone = true;    // Don't try to fade when there isn't a scene loaded
            loaded = false;
            animatedMove = {};

            // Set up fade if specified
            var fadeImg, workingPitch, workingYaw, workingHfov;
            if (config.sceneFadeDuration && !fadeDone) {
                var data = renderer.render(config.pitch * Math.PI / 180, config.yaw * Math.PI / 180, config.hfov * Math.PI / 180, {returnImage: true});
                if (data !== undefined) {
                    fadeImg = new Image();
                    fadeImg.className = 'pnlm-fade-img';
                    fadeImg.style.transition = 'opacity ' + (config.sceneFadeDuration / 1000) + 's';
                    fadeImg.style.width = '100%';
                    fadeImg.style.height = '100%';
                    fadeImg.onload = function() {
                        loadScene(sceneId, targetPitch, targetYaw, targetHfov, true);
                    };
                    fadeImg.src = data;
                    renderContainer.appendChild(fadeImg);
                    renderer.fadeImg = fadeImg;
                    return;
                }
            }

            // Set new pointing
            if (targetPitch === 'same') {
                workingPitch = config.pitch;
            } else {
                workingPitch = targetPitch;
            }
            if (targetYaw === 'same') {
                workingYaw = config.yaw;
            } else if (targetYaw === 'sameAzimuth') {
                workingYaw = config.yaw + (config.northOffset || 0) - (initialConfig.scenes[sceneId].northOffset || 0);
            } else {
                workingYaw = targetYaw;
            }
            if (targetHfov === 'same') {
                workingHfov = config.hfov;
            } else {
                workingHfov = targetHfov;
            }

            // Destroy hot spots from previous scene
            destroyHotSpots();

            // Create the new config for the scene
            mergeConfig(sceneId);

            // Stop motion
            speed.yaw = speed.pitch = speed.hfov = 0;

            // Reload scene
            processOptions();
            if (workingPitch !== undefined) {
                config.pitch = workingPitch;
            }
            if (workingYaw !== undefined) {
                config.yaw = workingYaw;
            }
            if (workingHfov !== undefined) {
                config.hfov = workingHfov;
            }
            fireEvent('scenechange', sceneId);
            load();
        }

        /**
         * Stop using device orientation.
         * @private
         */
        function stopOrientation() {
            window.removeEventListener('deviceorientation', orientationListener);
            controls.orientation.classList.remove('pnlm-orientation-button-active');
            orientation = false;
        }

        /**
         * Start using device orientation.
         * @private
         */
        function startOrientation() {
            if (!orientationSupport)
                return;
            if (typeof DeviceMotionEvent !== 'undefined' &&
                typeof DeviceMotionEvent.requestPermission === 'function') {
                DeviceOrientationEvent.requestPermission().then(function(response) {
                    if (response == 'granted') {
                        orientation = 1;
                        window.addEventListener('deviceorientation', orientationListener);
                        controls.orientation.classList.add('pnlm-orientation-button-active');
                    }
                });
            } else {
                orientation = 1;
                window.addEventListener('deviceorientation', orientationListener);
                controls.orientation.classList.add('pnlm-orientation-button-active');
            }
        }

        /**
         * Escapes HTML string (to mitigate possible DOM XSS attacks).
         * @private
         * @param {string} s - String to escape
         * @returns {string} Escaped string
         */
        function escapeHTML(s) {
            if (!initialConfig.escapeHTML)
                return String(s).split('\n').join('<br>');
            return String(s).split(/&/g).join('&amp;')
                .split('"').join('&quot;')
                .split("'").join('&#39;')
                .split('<').join('&lt;')
                .split('>').join('&gt;')
                .split('/').join('&#x2f;')
                .split('\n').join('<br>');  // Allow line breaks
        }

        /**
         * Removes possibility of XSS attacks with URLs.
         * The URL cannot be of protocol 'javascript'.
         * @private
         * @param {string} url - URL to sanitize
         * @param {boolean} href - True if URL is for link (blocks data URIs)
         * @returns {string} Sanitized URL
         */
        function sanitizeURL(url, href) {
            try {
                var decoded_url = decodeURIComponent(unescape(url)).replace(/[^\w:]/g, '').toLowerCase();
            } catch (e) {
                return 'about:blank';
            }
            if (decoded_url.indexOf('javascript:') === 0 ||
                decoded_url.indexOf('vbscript:') === 0) {
                console.log('Script URL removed.');
                return 'about:blank';
            }
            if (href && decoded_url.indexOf('data:') === 0) {
                console.log('Data URI removed from link.');
                return 'about:blank';
            }
            return url;
        }

        /**
         * Unescapes HTML entities.
         * Copied from Marked.js 0.7.0.
         * @private
         * @param {string} url - URL to sanitize
         * @param {boolean} href - True if URL is for link (blocks data URIs)
         * @returns {string} Sanitized URL
         */
        function unescape(html) {
            // Explicitly match decimal, hex, and named HTML entities
            return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig, function(_, n) {
                n = n.toLowerCase();
                if (n === 'colon') return ':';
                if (n.charAt(0) === '#') {
                    return n.charAt(1) === 'x'
                        ? String.fromCharCode(parseInt(n.substring(2), 16))
                        : String.fromCharCode(+n.substring(1));
                }
                return '';
            });
        }

        /**
         * Removes possibility of XSS atacks with URLs for CSS.
         * The URL will be sanitized with `sanitizeURL()` and single quotes
         * and double quotes escaped.
         * @private
         * @param {string} url - URL to sanitize
         * @returns {string} Sanitized URL
         */
        function sanitizeURLForCss(url) {
            return sanitizeURL(url)
                .replace(/"/g, '%22')
                .replace(/'/g, '%27');
        }

        /**
         * Checks whether or not a panorama is loaded.
         * @memberof Viewer
         * @instance
         * @returns {boolean} `true` if a panorama is loaded, else `false`
         */
        this.isLoaded = function() {
            return Boolean(loaded);
        };

        /**
         * Returns the pitch of the center of the view.
         * @memberof Viewer
         * @instance
         * @returns {number} Pitch in degrees
         */
        this.getPitch = function() {
            return config.pitch;
        };

        /**
         * Sets the pitch of the center of the view.
         * @memberof Viewer
         * @instance
         * @param {number} pitch - Pitch in degrees
         * @param {boolean|number} [animated=1000] - Animation duration in milliseconds or false for no animation
         * @param {function} [callback] - Function to call when animation finishes
         * @param {object} [callbackArgs] - Arguments to pass to callback function
         * @returns {Viewer} `this`
         */
        this.setPitch = function(pitch, animated, callback, callbackArgs) {
            latestInteraction = Date.now();
            if (Math.abs(pitch - config.pitch) <= eps) {
                if (typeof callback == 'function')
                    callback(callbackArgs);
                return this;
            }
            animated = animated == undefined ? 1000: Number(animated);
            if (animated) {
                animatedMove.pitch = {
                    'startTime': Date.now(),
                    'startPosition': config.pitch,
                    'endPosition': pitch,
                    'duration': animated
                };
                if (typeof callback == 'function')
                    setTimeout(function(){callback(callbackArgs);}, animated);
            } else {
                config.pitch = pitch;
            }
            animateInit();
            return this;
        };

        /**
         * Returns the minimum and maximum allowed pitches (in degrees).
         * @memberof Viewer
         * @instance
         * @returns {number[]} [minimum pitch, maximum pitch]
         */
        this.getPitchBounds = function() {
            return [config.minPitch, config.maxPitch];
        };

        /**
         * Set the minimum and maximum allowed pitches (in degrees).
         * @memberof Viewer
         * @instance
         * @param {number[]} bounds - [minimum pitch, maximum pitch]
         * @returns {Viewer} `this`
         */
        this.setPitchBounds = function(bounds) {
            config.minPitch = Math.max(-90, Math.min(bounds[0], 90));
            config.maxPitch = Math.max(-90, Math.min(bounds[1], 90));
            return this;
        };

        /**
         * Returns the yaw of the center of the view.
         * @memberof Viewer
         * @instance
         * @returns {number} Yaw in degrees
         */
        this.getYaw = function() {
            return (config.yaw + 540) % 360 - 180;
        };

        /**
         * Sets the yaw of the center of the view.
         * @memberof Viewer
         * @instance
         * @param {number} yaw - Yaw in degrees [-180, 180]
         * @param {boolean|number} [animated=1000] - Animation duration in milliseconds or false for no animation
         * @param {function} [callback] - Function to call when animation finishes
         * @param {object} [callbackArgs] - Arguments to pass to callback function
         * @returns {Viewer} `this`
         */
        this.setYaw = function(yaw, animated, callback, callbackArgs) {
            latestInteraction = Date.now();
            if (Math.abs(yaw - config.yaw) <= eps) {
                if (typeof callback == 'function')
                    callback(callbackArgs);
                return this;
            }
            animated = animated == undefined ? 1000: Number(animated);
            yaw = ((yaw + 180) % 360) - 180; // Keep in bounds
            if (animated) {
                // Animate in shortest direction
                if (config.yaw - yaw > 180)
                    yaw += 360;
                else if (yaw - config.yaw > 180)
                    yaw -= 360;

                animatedMove.yaw = {
                    'startTime': Date.now(),
                    'startPosition': config.yaw,
                    'endPosition': yaw,
                    'duration': animated
                };
                if (typeof callback == 'function')
                    setTimeout(function(){callback(callbackArgs);}, animated);
            } else {
                config.yaw = yaw;
            }
            animateInit();
            return this;
        };

        /**
         * Returns the minimum and maximum allowed pitches (in degrees).
         * @memberof Viewer
         * @instance
         * @returns {number[]} [yaw pitch, maximum yaw]
         */
        this.getYawBounds = function() {
            return [config.minYaw, config.maxYaw];
        };

        /**
         * Set the minimum and maximum allowed yaws (in degrees [-360, 360]).
         * @memberof Viewer
         * @instance
         * @param {number[]} bounds - [minimum yaw, maximum yaw]
         * @returns {Viewer} `this`
         */
        this.setYawBounds = function(bounds) {
            config.minYaw = Math.max(-360, Math.min(bounds[0], 360));
            config.maxYaw = Math.max(-360, Math.min(bounds[1], 360));
            return this;
        };

        /**
         * Returns the horizontal field of view.
         * @memberof Viewer
         * @instance
         * @returns {number} Horizontal field of view in degrees
         */
        this.getHfov = function() {
            return config.hfov;
        };

        /**
         * Sets the horizontal field of view.
         * @memberof Viewer
         * @instance
         * @param {number} hfov - Horizontal field of view in degrees
         * @param {boolean|number} [animated=1000] - Animation duration in milliseconds or false for no animation
         * @param {function} [callback] - Function to call when animation finishes
         * @param {object} [callbackArgs] - Arguments to pass to callback function
         * @returns {Viewer} `this`
         */
        this.setHfov = function(hfov, animated, callback, callbackArgs) {
            latestInteraction = Date.now();
            if (Math.abs(hfov - config.hfov) <= eps) {
                if (typeof callback == 'function')
                    callback(callbackArgs);
                return this;
            }
            animated = animated == undefined ? 1000: Number(animated);
            if (animated) {
                animatedMove.hfov = {
                    'startTime': Date.now(),
                    'startPosition': config.hfov,
                    'endPosition': constrainHfov(hfov),
                    'duration': animated
                };
                if (typeof callback == 'function')
                    setTimeout(function(){callback(callbackArgs);}, animated);
            } else {
                setHfov(hfov);
            }
            animateInit();
            return this;
        };

        /**
         * Returns the minimum and maximum allowed horizontal fields of view
         * (in degrees).
         * @memberof Viewer
         * @instance
         * @returns {number[]} [minimum hfov, maximum hfov]
         */
        this.getHfovBounds = function() {
            return [config.minHfov, config.maxHfov];
        };

        /**
         * Set the minimum and maximum allowed horizontal fields of view (in degrees).
         * @memberof Viewer
         * @instance
         * @param {number[]} bounds - [minimum hfov, maximum hfov]
         * @returns {Viewer} `this`
         */
        this.setHfovBounds = function(bounds) {
            config.minHfov = Math.max(0, bounds[0]);
            config.maxHfov = Math.max(0, bounds[1]);
            return this;
        };

        /**
         * Set a new view. Any parameters not specified remain the same.
         * @memberof Viewer
         * @instance
         * @param {number} [pitch] - Target pitch
         * @param {number} [yaw] - Target yaw
         * @param {number} [hfov] - Target hfov
         * @param {boolean|number} [animated=1000] - Animation duration in milliseconds or false for no animation
         * @param {function} [callback] - Function to call when animation finishes
         * @param {object} [callbackArgs] - Arguments to pass to callback function
         * @returns {Viewer} `this`
         */
        this.lookAt = function(pitch, yaw, hfov, animated, callback, callbackArgs) {
            animated = animated == undefined ? 1000: Number(animated);
            if (pitch !== undefined && Math.abs(pitch - config.pitch) > eps) {
                this.setPitch(pitch, animated, callback, callbackArgs);
                callback = undefined;
            }
            if (yaw !== undefined && Math.abs(yaw - config.yaw) > eps) {
                this.setYaw(yaw, animated, callback, callbackArgs);
                callback = undefined;
            }
            if (hfov !== undefined && Math.abs(hfov - config.hfov) > eps) {
                this.setHfov(hfov, animated, callback, callbackArgs);
                callback = undefined;
            }
            if (typeof callback == 'function')
                callback(callbackArgs);
            return this;
        };

        /**
         * Returns the panorama's north offset.
         * @memberof Viewer
         * @instance
         * @returns {number} North offset in degrees
         */
        this.getNorthOffset = function() {
            return config.northOffset;
        };

        /**
         * Sets the panorama's north offset.
         * @memberof Viewer
         * @instance
         * @param {number} heading - North offset in degrees
         * @returns {Viewer} `this`
         */
        this.setNorthOffset = function(heading) {
            config.northOffset = Math.min(360, Math.max(0, heading));
            animateInit();
            return this;
        };

        /**
         * Returns the panorama's horizon roll.
         * @memberof Viewer
         * @instance
         * @returns {number} Horizon roll in degrees
         */
        this.getHorizonRoll = function() {
            return config.horizonRoll;
        };

        /**
         * Sets the panorama's horizon roll.
         * @memberof Viewer
         * @instance
         * @param {number} roll - Horizon roll in degrees [-90, 90]
         * @returns {Viewer} `this`
         */
        this.setHorizonRoll = function(roll) {
            config.horizonRoll = Math.min(90, Math.max(-90, roll));
            renderer.setPose(config.horizonPitch * Math.PI / 180, config.horizonRoll * Math.PI / 180);
            animateInit();
            return this;
        };

        /**
         * Returns the panorama's horizon pitch.
         * @memberof Viewer
         * @instance
         * @returns {number} Horizon pitch in degrees
         */
        this.getHorizonPitch = function() {
            return config.horizonPitch;
        };

        /**
         * Sets the panorama's horizon pitch.
         * @memberof Viewer
         * @instance
         * @param {number} pitch - Horizon pitch in degrees [-90, 90]
         * @returns {Viewer} `this`
         */
        this.setHorizonPitch = function(pitch) {
            config.horizonPitch = Math.min(90, Math.max(-90, pitch));
            renderer.setPose(config.horizonPitch * Math.PI / 180, config.horizonRoll * Math.PI / 180);
            animateInit();
            return this;
        };

        /**
         * Start auto rotation.
         *
         * Before starting rotation, the viewer is panned to `pitch`.
         * @memberof Viewer
         * @instance
         * @param {number} [speed] - Auto rotation speed / direction. If not specified, previous value is used.
         * @param {number} [pitch] - The pitch to rotate at. If not specified, inital pitch is used.
         * @returns {Viewer} `this`
         */
        this.startAutoRotate = function(speed, pitch) {
            speed = speed || autoRotateSpeed || 1;
            pitch = pitch === undefined ? origPitch : pitch;
            config.autoRotate = speed;
            _this.lookAt(pitch, undefined, origHfov, 3000);
            animateInit();
            return this;
        };

        /**
         * Stop auto rotation.
         * @memberof Viewer
         * @instance
         * @returns {Viewer} `this`
         */
        this.stopAutoRotate = function() {
            autoRotateSpeed = config.autoRotate ? config.autoRotate : autoRotateSpeed;
            config.autoRotate = false;
            config.autoRotateInactivityDelay = -1;
            return this;
        };

        /**
         * Stops all movement.
         * @memberof Viewer
         * @instance
         */
        this.stopMovement = function() {
            stopAnimation();
            speed = {'yaw': 0, 'pitch': 0, 'hfov': 0};
        };

        /**
         * Returns the panorama renderer.
         * @memberof Viewer
         * @instance
         * @returns {Renderer}
         */
        this.getRenderer = function() {
            return renderer;
        };

        /**
         * Sets update flag for dynamic content.
         * @memberof Viewer
         * @instance
         * @param {boolean} bool - Whether or not viewer should update even when still
         * @returns {Viewer} `this`
         */
        this.setUpdate = function(bool) {
            update = bool === true;
            if (renderer === undefined)
                onImageLoad();
            else
                animateInit();
            return this;
        };

        /**
         * Calculate panorama pitch and yaw from location of mouse event.
         * @memberof Viewer
         * @instance
         * @param {MouseEvent} event - Document mouse down event.
         * @returns {number[]} [pitch, yaw]
         */
        this.mouseEventToCoords = function(event) {
            return mouseEventToCoords(event);
        };

        /**
         * Change scene being viewed.
         * @memberof Viewer
         * @instance
         * @param {string} sceneId - Identifier of scene to switch to.
         * @param {number} [pitch] - Pitch to use with new scene
         * @param {number} [yaw] - Yaw to use with new scene
         * @param {number} [hfov] - HFOV to use with new scene
         * @returns {Viewer} `this`
         */
        this.loadScene = function(sceneId, pitch, yaw, hfov) {
            if (loaded !== false)
                loadScene(sceneId, pitch, yaw, hfov);
            return this;
        };

        /**
         * Get ID of current scene.
         * @memberof Viewer
         * @instance
         * @returns {string} ID of current scene
         */
        this.getScene = function() {
            return config.scene;
        };

        /**
         * Add a new scene.
         * @memberof Viewer
         * @instance
         * @param {string} sceneId - The ID of the new scene
         * @param {string} config - The configuration of the new scene
         * @returns {Viewer} `this`
         */
        this.addScene = function(sceneId, config) {
            initialConfig.scenes[sceneId] = config;
            return this;
        };

        /**
         * Remove a scene.
         * @memberof Viewer
         * @instance
         * @param {string} sceneId - The ID of the scene
         * @returns {boolean} False if the scene is the current scene or if the scene doesn't exists, else true
         */
        this.removeScene = function(sceneId) {
            if (config.scene === sceneId || !initialConfig.scenes.hasOwnProperty(sceneId))
                return false;
            delete initialConfig.scenes[sceneId];
            return true;
        };

        /**
         * Toggle fullscreen.
         * @memberof Viewer
         * @instance
         * @returns {Viewer} `this`
         */
        this.toggleFullscreen = function() {
            toggleFullscreen();
            return this;
        };

        /**
         * Get configuration of current scene.
         * @memberof Viewer
         * @instance
         * @returns {Object} Configuration of current scene
         */
        this.getConfig = function() {
            return config;
        };

        /**
         * Get viewer's container element.
         * @memberof Viewer
         * @instance
         * @returns {HTMLElement} Container `div` element
         */
        this.getContainer = function() {
            return container;
        };

        /**
         * Add a new hot spot.
         * @memberof Viewer
         * @instance
         * @param {Object} hs - The configuration for the hot spot
         * @param {string} [sceneId] - Adds hot spot to specified scene if provided, else to current scene
         * @returns {Viewer} `this`
         * @throws Throws an error if the scene ID is provided but invalid
         */
        this.addHotSpot = function(hs, sceneId) {
            if (sceneId === undefined && config.scene === undefined) {
                // Not a tour
                config.hotSpots.push(hs);
            } else {
                // Tour
                var id = sceneId !== undefined ? sceneId : config.scene;
                if (initialConfig.scenes.hasOwnProperty(id)) {
                    if (!initialConfig.scenes[id].hasOwnProperty('hotSpots')) {
                        initialConfig.scenes[id].hotSpots = []; // Create hot spots array if needed
                        if (id == config.scene)
                            config.hotSpots = initialConfig.scenes[id].hotSpots;    // Link to current config
                    }
                    initialConfig.scenes[id].hotSpots.push(hs); // Add hot spot to config
                } else {
                    throw 'Invalid scene ID!';
                }
            }
            if (sceneId === undefined || config.scene == sceneId) {
                // Add to current scene
                createHotSpot(hs);
                if (loaded)
                    renderHotSpot(hs);
            }
            return this;
        };

        /**
         * Remove a hot spot.
         * @memberof Viewer
         * @instance
         * @param {string} hotSpotId - The ID of the hot spot
         * @param {string} [sceneId] - Removes hot spot from specified scene if provided, else from current scene
         * @returns {boolean} True if deletion is successful, else false
         */
        this.removeHotSpot = function(hotSpotId, sceneId) {
            if (sceneId === undefined || config.scene == sceneId) {
                if (!config.hotSpots)
                    return false;
                for (var i = 0; i < config.hotSpots.length; i++) {
                    if (config.hotSpots[i].hasOwnProperty('id') &&
                        config.hotSpots[i].id === hotSpotId) {
                        // Delete hot spot DOM elements
                        var current = config.hotSpots[i].div;
                        while (current.parentNode != renderContainer)
                            current = current.parentNode;
                        renderContainer.removeChild(current);
                        delete config.hotSpots[i].div;
                        // Remove hot spot from configuration
                        config.hotSpots.splice(i, 1);
                        return true;
                    }
                }
            } else {
                if (initialConfig.scenes.hasOwnProperty(sceneId)) {
                    if (!initialConfig.scenes[sceneId].hasOwnProperty('hotSpots'))
                        return false;
                    for (var j = 0; j < initialConfig.scenes[sceneId].hotSpots.length; j++) {
                        if (initialConfig.scenes[sceneId].hotSpots[j].hasOwnProperty('id') &&
                            initialConfig.scenes[sceneId].hotSpots[j].id === hotSpotId) {
                            // Remove hot spot from configuration
                            initialConfig.scenes[sceneId].hotSpots.splice(j, 1);
                            return true;
                        }
                    }
                } else {
                    return false;
                }
            }
        };

        /**
         * This method should be called if the viewer's container is resized.
         * @memberof Viewer
         * @instance
         */
        this.resize = function() {
            if (renderer)
                onDocumentResize();
        };

        /**
         * Check if a panorama is loaded.
         * @memberof Viewer
         * @instance
         * @returns {boolean} True if a panorama is loaded, else false
         */
        this.isLoaded = function() {
            return loaded;
        };

        /**
         * Check if device orientation control is supported.
         * @memberof Viewer
         * @instance
         * @returns {boolean} True if supported, else false
         */
        this.isOrientationSupported = function() {
            return orientationSupport || false;
        };

        /**
         * Stop using device orientation.
         * @memberof Viewer
         * @instance
         */
        this.stopOrientation = function() {
            stopOrientation();
        };

        /**
         * Start using device orientation (does nothing if not supported).
         * @memberof Viewer
         * @instance
         */
        this.startOrientation = function() {
            if (orientationSupport)
                startOrientation();
        };

        /**
         * Check if device orientation control is currently activated.
         * @memberof Viewer
         * @instance
         * @returns {boolean} True if active, else false
         */
        this.isOrientationActive = function() {
            return Boolean(orientation);
        };

        /**
         * Subscribe listener to specified event.
         * @memberof Viewer
         * @instance
         * @param {string} type - Type of event to subscribe to.
         * @param {Function} listener - Listener function to subscribe to event.
         * @returns {Viewer} `this`
         */
        this.on = function(type, listener) {
            externalEventListeners[type] = externalEventListeners[type] || [];
            externalEventListeners[type].push(listener);
            return this;
        };

        /**
         * Remove an event listener (or listeners).
         * @memberof Viewer
         * @param {string} [type] - Type of event to remove listeners from. If not specified, all listeners are removed.
         * @param {Function} [listener] - Listener function to remove. If not specified, all listeners of specified type are removed.
         * @returns {Viewer} `this`
         */
        this.off = function(type, listener) {
            if (!type) {
                // Remove all listeners if type isn't specified
                externalEventListeners = {};
                return this;
            }
            if (listener) {
                var i = externalEventListeners[type].indexOf(listener);
                if (i >= 0) {
                    // Remove listener if found
                    externalEventListeners[type].splice(i, 1);
                }
                if (externalEventListeners[type].length == 0) {
                    // Remove category if empty
                    delete externalEventListeners[type];
                }
            } else {
                // Remove category of listeners if listener isn't specified
                delete externalEventListeners[type];
            }
            return this;
        };

        /**
         * Fire listeners attached to specified event.
         * @private
         * @param {string} [type] - Type of event to fire listeners for.
         */
        function fireEvent(type) {
            if (type in externalEventListeners) {
                // Reverse iteration is useful, if event listener is removed inside its definition
                for (var i = externalEventListeners[type].length; i > 0; i--) {
                    externalEventListeners[type][externalEventListeners[type].length - i].apply(null, [].slice.call(arguments, 1));
                }
            }
        }

        /**
         * Destructor.
         * @instance
         * @memberof Viewer
         */
        this.destroy = function() {
            destroyed = true;
            clearTimeout(autoRotateStart);

            if (renderer)
                renderer.destroy();
            if (listenersAdded) {
                document.removeEventListener('mousemove', onDocumentMouseMove, false);
                document.removeEventListener('compasschange', onDocumentCompassChange, false);
                document.removeEventListener('mouseup', onDocumentMouseUp, false);
                container.removeEventListener('mozfullscreenchange', onFullScreenChange, false);
                container.removeEventListener('webkitfullscreenchange', onFullScreenChange, false);
                container.removeEventListener('msfullscreenchange', onFullScreenChange, false);
                container.removeEventListener('fullscreenchange', onFullScreenChange, false);
                window.removeEventListener('resize', onDocumentResize, false);
                window.removeEventListener('orientationchange', onDocumentResize, false);
                container.removeEventListener('keydown', onDocumentKeyPress, false);
                container.removeEventListener('keyup', onDocumentKeyUp, false);
                container.removeEventListener('blur', clearKeys, false);
                document.removeEventListener('mouseleave', onDocumentMouseUp, false);
            }
            container.innerHTML = '';
            container.classList.remove('pnlm-container');
        };

    }

    return {
        viewer: function(container, config) {
            return new Viewer(container, config);
        }
    };

})(window, document);
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/public/lib/pannellum/src/js/libpannellum.js?ver=1 
/*
 * libpannellum - A WebGL and CSS 3D transform based Panorama Renderer
 * Copyright (c) 2012-2019 Matthew Petroff
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

window.libpannellum = (function(window, document, undefined) {

'use strict';

/**
 * Creates a new panorama renderer.
 * @constructor
 * @param {HTMLElement} container - The container element for the renderer.
 */
function Renderer(container) {
    var canvas = document.createElement('canvas');
    canvas.style.width = canvas.style.height = '100%';
    container.appendChild(canvas);

    var program, gl, vs, fs;
    var fallbackImgSize;
    var world;
    var vtmps;
    var pose;
    var image, imageType, dynamic;
    var texCoordBuffer, cubeVertBuf, cubeVertTexCoordBuf, cubeVertIndBuf;
    var globalParams;

    /**
     * Initialize renderer.
     * @memberof Renderer
     * @instance
     * @param {Image|Array|Object} image - Input image; format varies based on
     *      `imageType`. For `equirectangular`, this is an image; for
     *      `cubemap`, this is an array of images for the cube faces in the
     *      order [+z, +x, -z, -x, +y, -y]; for `multires`, this is a
     *      configuration object.
     * @param {string} imageType - The type of the image: `equirectangular`,
     *      `cubemap`, or `multires`.
     * @param {boolean} dynamic - Whether or not the image is dynamic (e.g. video).
     * @param {number} haov - Initial horizontal angle of view.
     * @param {number} vaov - Initial vertical angle of view.
     * @param {number} voffset - Initial vertical offset angle.
     * @param {function} callback - Load callback function.
     * @param {Object} [params] - Other configuration parameters (`horizonPitch`, `horizonRoll`, `backgroundColor`).
     */
    this.init = function(_image, _imageType, _dynamic, haov, vaov, voffset, callback, params) {
        // Default argument for image type
        if (_imageType === undefined)
            _imageType = 'equirectangular';

        if (_imageType != 'equirectangular' && _imageType != 'cubemap' &&
            _imageType != 'multires') {
            console.log('Error: invalid image type specified!');
            throw {type: 'config error'};
        }

        imageType = _imageType;
        image = _image;
        dynamic = _dynamic;
        globalParams = params || {};

        // Clear old data
        if (program) {
            if (vs) {
                gl.detachShader(program, vs);
                gl.deleteShader(vs);
            }
            if (fs) {
                gl.detachShader(program, fs);
                gl.deleteShader(fs);
            }
            gl.bindBuffer(gl.ARRAY_BUFFER, null);
            gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
            if (program.texture)
                gl.deleteTexture(program.texture);
            if (program.nodeCache)
                for (var i = 0; i < program.nodeCache.length; i++)
                    gl.deleteTexture(program.nodeCache[i].texture);
            gl.deleteProgram(program);
            program = undefined;
        }
        pose = undefined;

        var s;
        var faceMissing = false;
        var cubeImgWidth;
        if (imageType == 'cubemap') {
            for (s = 0; s < 6; s++) {
                if (image[s].width > 0) {
                    if (cubeImgWidth === undefined)
                        cubeImgWidth = image[s].width;
                    if (cubeImgWidth != image[s].width)
                        console.log('Cube faces have inconsistent widths: ' + cubeImgWidth + ' vs. ' + image[s].width);
                } else
                    faceMissing = true;
            }
        }
        function fillMissingFaces(imgSize) {
            if (faceMissing) { // Fill any missing fallback/cubemap faces with background
                var nbytes = imgSize * imgSize * 4; // RGB, plus non-functional alpha
                var imageArray = new Uint8ClampedArray(nbytes);
                var rgb = params.backgroundColor ? params.backgroundColor : [0, 0, 0];
                rgb[0] *= 255;
                rgb[1] *= 255;
                rgb[2] *= 255;
                // Maybe filling could be done faster, see e.g. https://stackoverflow.com/questions/1295584/most-efficient-way-to-create-a-zero-filled-javascript-array
                for (var i = 0; i < nbytes; i++) {
                    imageArray[i++] = rgb[0];
                    imageArray[i++] = rgb[1];
                    imageArray[i++] = rgb[2];
                }
                var backgroundSquare = new ImageData(imageArray, imgSize, imgSize);
                for (s = 0; s < 6; s++) {
                    if (image[s].width == 0)
                        image[s] = backgroundSquare;
                }
            }
        }
        
        // This awful browser specific test exists because iOS 8/9 and IE 11
        // don't display non-power-of-two cubemap textures but also don't
        // throw an error (tested on an iPhone 5c / iOS 8.1.3 / iOS 9.2 /
        // iOS 10.3.1).
        // Therefore, the WebGL context is never created for these browsers for
        // NPOT cubemaps, and the CSS 3D transform fallback renderer is used
        // instead.
        if (!(imageType == 'cubemap' &&
            (cubeImgWidth & (cubeImgWidth - 1)) !== 0 &&
            (navigator.userAgent.toLowerCase().match(/(iphone|ipod|ipad).* os 8_/) ||
            navigator.userAgent.toLowerCase().match(/(iphone|ipod|ipad).* os 9_/) ||
            navigator.userAgent.toLowerCase().match(/(iphone|ipod|ipad).* os 10_/) ||
            navigator.userAgent.match(/Trident.*rv[ :]*11\./)))) {
            // Enable WebGL on canvas
            if (!gl)
                gl = canvas.getContext('experimental-webgl', {alpha: false, depth: false});
            if (gl && gl.getError() == 1286)
                handleWebGLError1286();
        }
        
        // If there is no WebGL, fall back to CSS 3D transform renderer.
        // This will discard the image loaded so far and load the fallback image.
        // While browser specific tests are usually frowned upon, the
        // fallback viewer only really works with WebKit/Blink and IE 10/11
        // (it doesn't work properly in Firefox).
        if (!gl && ((imageType == 'multires' && image.hasOwnProperty('fallbackPath')) ||
            imageType == 'cubemap') &&
            ('WebkitAppearance' in document.documentElement.style ||
            navigator.userAgent.match(/Trident.*rv[ :]*11\./) ||
            navigator.appVersion.indexOf('MSIE 10') !== -1)) {
            // Remove old world if it exists
            if (world) {
                container.removeChild(world);
            }
            
            // Initialize renderer
            world = document.createElement('div');
            world.className = 'pnlm-world';
            
            // Add images
            var path;
            if (image.basePath) {
                path = image.basePath + image.fallbackPath;
            } else {
                path = image.fallbackPath;
            }
            var sides = ['f', 'r', 'b', 'l', 'u', 'd'];
            var loaded = 0;
            var onLoad = function() {
                // Draw image on canvas
                var faceCanvas = document.createElement('canvas');
                faceCanvas.className = 'pnlm-face pnlm-' + sides[this.side] + 'face';
                world.appendChild(faceCanvas);
                var faceContext = faceCanvas.getContext('2d');
                faceCanvas.style.width = this.width + 4 + 'px';
                faceCanvas.style.height = this.height + 4 + 'px';
                faceCanvas.width = this.width + 4;
                faceCanvas.height = this.height + 4;
                faceContext.drawImage(this, 2, 2);
                var imgData = faceContext.getImageData(0, 0, faceCanvas.width, faceCanvas.height);
                var data = imgData.data;
                
                // Duplicate edge pixels
                var i;
                var j;
                for (i = 2; i < faceCanvas.width - 2; i++) {
                    for (j = 0; j < 4; j++) {
                        data[(i + faceCanvas.width) * 4 + j] = data[(i + faceCanvas.width * 2) * 4 + j];
                        data[(i + faceCanvas.width * (faceCanvas.height - 2)) * 4 + j] = data[(i + faceCanvas.width * (faceCanvas.height - 3)) * 4 + j];
                    }
                }
                for (i = 2; i < faceCanvas.height - 2; i++) {
                    for (j = 0; j < 4; j++) {
                        data[(i * faceCanvas.width + 1) * 4 + j] = data[(i * faceCanvas.width + 2) * 4 + j];
                        data[((i + 1) * faceCanvas.width - 2) * 4 + j] = data[((i + 1) * faceCanvas.width - 3) * 4 + j];
                    }
                }
                for (j = 0; j < 4; j++) {
                    data[(faceCanvas.width + 1) * 4 + j] = data[(faceCanvas.width * 2 + 2) * 4 + j];
                    data[(faceCanvas.width * 2 - 2) * 4 + j] = data[(faceCanvas.width * 3 - 3) * 4 + j];
                    data[(faceCanvas.width * (faceCanvas.height - 2) + 1) * 4 + j] = data[(faceCanvas.width * (faceCanvas.height - 3) + 2) * 4 + j];
                    data[(faceCanvas.width * (faceCanvas.height - 1) - 2) * 4 + j] = data[(faceCanvas.width * (faceCanvas.height - 2) - 3) * 4 + j];
                }
                for (i = 1; i < faceCanvas.width - 1; i++) {
                    for (j = 0; j < 4; j++) {
                        data[i * 4 + j] = data[(i + faceCanvas.width) * 4 + j];
                        data[(i + faceCanvas.width * (faceCanvas.height - 1)) * 4 + j] = data[(i + faceCanvas.width * (faceCanvas.height - 2)) * 4 + j];
                    }
                }
                for (i = 1; i < faceCanvas.height - 1; i++) {
                    for (j = 0; j < 4; j++) {
                        data[(i * faceCanvas.width) * 4 + j] = data[(i * faceCanvas.width + 1) * 4 + j];
                        data[((i + 1) * faceCanvas.width - 1) * 4 + j] = data[((i + 1) * faceCanvas.width - 2) * 4 + j];
                    }
                }
                for (j = 0; j < 4; j++) {
                    data[j] = data[(faceCanvas.width + 1) * 4 + j];
                    data[(faceCanvas.width - 1) * 4 + j] = data[(faceCanvas.width * 2 - 2) * 4 + j];
                    data[(faceCanvas.width * (faceCanvas.height - 1)) * 4 + j] = data[(faceCanvas.width * (faceCanvas.height - 2) + 1) * 4 + j];
                    data[(faceCanvas.width * faceCanvas.height - 1) * 4 + j] = data[(faceCanvas.width * (faceCanvas.height - 1) - 2) * 4 + j];
                }
                
                // Draw image width duplicated edge pixels on canvas
                faceContext.putImageData(imgData, 0, 0);
                
                incLoaded.call(this);
            };
            var incLoaded = function() {
                if (this.width > 0) {
                    if (fallbackImgSize === undefined)
                        fallbackImgSize = this.width;
                    if (fallbackImgSize != this.width)
                        console.log('Fallback faces have inconsistent widths: ' + fallbackImgSize + ' vs. ' + this.width);
                } else
                    faceMissing = true;
                loaded++;
                if (loaded == 6) {
                    fallbackImgSize = this.width;
                    container.appendChild(world);
                    callback();
                }
            };
            faceMissing = false;
            for (s = 0; s < 6; s++) {
                var faceImg = new Image();
                faceImg.crossOrigin = globalParams.crossOrigin ? globalParams.crossOrigin : 'anonymous';
                faceImg.side = s;
                faceImg.onload = onLoad;
                faceImg.onerror = incLoaded; // ignore missing face to support partial fallback image
                if (imageType == 'multires') {
                    faceImg.src = path.replace('%s', sides[s]) + '.' + image.extension;
                } else {
                    faceImg.src = image[s].src;
                }
            }
            fillMissingFaces(fallbackImgSize);
            return;
        } else if (!gl) {
            console.log('Error: no WebGL support detected!');
            throw {type: 'no webgl'};
        }
        if (imageType == 'cubemap')
            fillMissingFaces(cubeImgWidth);
        if (image.basePath) {
            image.fullpath = image.basePath + image.path;
        } else {
            image.fullpath = image.path;
        }
        image.invTileResolution = 1 / image.tileResolution;
        
        var vertices = createCube();
        vtmps = [];
        for (s = 0; s < 6; s++) {
            vtmps[s] = vertices.slice(s * 12, s * 12 + 12);
            vertices = createCube();
        }
        
        // Make sure image isn't too big
        var maxWidth = 0;
        if (imageType == 'equirectangular') {
            maxWidth = gl.getParameter(gl.MAX_TEXTURE_SIZE);
            if (Math.max(image.width / 2, image.height) > maxWidth) {
                console.log('Error: The image is too big; it\'s ' + image.width + 'px wide, '+
                            'but this device\'s maximum supported size is ' + (maxWidth * 2) + 'px.');
                throw {type: 'webgl size error', width: image.width, maxWidth: maxWidth * 2};
            }
        } else if (imageType == 'cubemap') {
            if (cubeImgWidth > gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE)) {
                console.log('Error: The image is too big; it\'s ' + cubeImgWidth + 'px wide, ' +
                            'but this device\'s maximum supported size is ' + maxWidth + 'px.');
                throw {type: 'webgl size error', width: cubeImgWidth, maxWidth: maxWidth};
            }
        }

        // Store horizon pitch and roll if applicable
        if (params !== undefined && (params.horizonPitch !== undefined || params.horizonRoll !== undefined))
            pose = [params.horizonPitch == undefined ? 0 : params.horizonPitch,
                    params.horizonRoll == undefined ? 0 : params.horizonRoll];

        // Set 2d texture binding
        var glBindType = gl.TEXTURE_2D;

        // Create viewport for entire canvas
        gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);

        // Check precision support
        if (gl.getShaderPrecisionFormat) {
            var precision = gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT);
            if (precision && precision.precision < 1) {
                // `highp` precision not supported; https://stackoverflow.com/a/33308927
                fragEquiCubeBase = fragEquiCubeBase.replace('highp', 'mediump');
            }
        }

        // Create vertex shader
        vs = gl.createShader(gl.VERTEX_SHADER);
        var vertexSrc = v;
        if (imageType == 'multires') {
            vertexSrc = vMulti;
        }
        gl.shaderSource(vs, vertexSrc);
        gl.compileShader(vs);

        // Create fragment shader
        fs = gl.createShader(gl.FRAGMENT_SHADER);
        var fragmentSrc = fragEquirectangular;
        if (imageType == 'cubemap') {
            glBindType = gl.TEXTURE_CUBE_MAP;
            fragmentSrc = fragCube;
        } else if (imageType == 'multires') {
            fragmentSrc = fragMulti;
        }
        gl.shaderSource(fs, fragmentSrc);
        gl.compileShader(fs);

        // Link WebGL program
        program = gl.createProgram();
        gl.attachShader(program, vs);
        gl.attachShader(program, fs);
        gl.linkProgram(program);

        // Log errors
        if (!gl.getShaderParameter(vs, gl.COMPILE_STATUS))
            console.log(gl.getShaderInfoLog(vs));
        if (!gl.getShaderParameter(fs, gl.COMPILE_STATUS))
            console.log(gl.getShaderInfoLog(fs));
        if (!gl.getProgramParameter(program, gl.LINK_STATUS))
            console.log(gl.getProgramInfoLog(program));

        // Use WebGL program
        gl.useProgram(program);

        program.drawInProgress = false;

        // Set background clear color (does not apply to cubemap/fallback image)
        var color = params.backgroundColor ? params.backgroundColor : [0, 0, 0];
        gl.clearColor(color[0], color[1], color[2], 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        // Look up texture coordinates location
        program.texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
        gl.enableVertexAttribArray(program.texCoordLocation);

        if (imageType != 'multires') {
            // Provide texture coordinates for rectangle
            if (!texCoordBuffer)
                texCoordBuffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
            gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1,1,1,1,1,-1,-1,1,1,-1,-1,-1]), gl.STATIC_DRAW);
            gl.vertexAttribPointer(program.texCoordLocation, 2, gl.FLOAT, false, 0, 0);

            // Pass aspect ratio
            program.aspectRatio = gl.getUniformLocation(program, 'u_aspectRatio');
            gl.uniform1f(program.aspectRatio, gl.drawingBufferWidth / gl.drawingBufferHeight);

            // Locate psi, theta, focal length, horizontal extent, vertical extent, and vertical offset
            program.psi = gl.getUniformLocation(program, 'u_psi');
            program.theta = gl.getUniformLocation(program, 'u_theta');
            program.f = gl.getUniformLocation(program, 'u_f');
            program.h = gl.getUniformLocation(program, 'u_h');
            program.v = gl.getUniformLocation(program, 'u_v');
            program.vo = gl.getUniformLocation(program, 'u_vo');
            program.rot = gl.getUniformLocation(program, 'u_rot');

            // Pass horizontal extent, vertical extent, and vertical offset
            gl.uniform1f(program.h, haov / (Math.PI * 2.0));
            gl.uniform1f(program.v, vaov / Math.PI);
            gl.uniform1f(program.vo, voffset / Math.PI * 2);

            // Set background color
            if (imageType == 'equirectangular') {
                program.backgroundColor = gl.getUniformLocation(program, 'u_backgroundColor');
                gl.uniform4fv(program.backgroundColor, color.concat([1]));
            }

            // Create texture
            program.texture = gl.createTexture();
            gl.bindTexture(glBindType, program.texture);

            // Upload images to texture depending on type
            if (imageType == 'cubemap') {
                // Load all six sides of the cube map
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_POSITIVE_X, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[1]);
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_NEGATIVE_X, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[3]);
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_POSITIVE_Y, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[4]);
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[5]);
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_POSITIVE_Z, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[0]);
                gl.texImage2D(gl.TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image[2]);
            } else {
                if (image.width <= maxWidth) {
                    gl.uniform1i(gl.getUniformLocation(program, 'u_splitImage'), 0);
                    // Upload image to the texture
                    gl.texImage2D(glBindType, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image);
                } else {
                    // Image needs to be split into two parts due to texture size limits
                    gl.uniform1i(gl.getUniformLocation(program, 'u_splitImage'), 1);

                    // Draw image on canvas
                    var cropCanvas = document.createElement('canvas');
                    cropCanvas.width = image.width / 2;
                    cropCanvas.height = image.height;
                    var cropContext = cropCanvas.getContext('2d');
                    cropContext.drawImage(image, 0, 0);

                    // Upload first half of image to the texture
                    var cropImage = cropContext.getImageData(0, 0, image.width / 2, image.height);
                    gl.texImage2D(glBindType, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, cropImage);

                    // Create and bind texture for second half of image
                    program.texture2 = gl.createTexture();
                    gl.activeTexture(gl.TEXTURE1);
                    gl.bindTexture(glBindType, program.texture2);
                    gl.uniform1i(gl.getUniformLocation(program, 'u_image1'), 1);

                    // Upload second half of image to the texture
                    cropContext.drawImage(image, -image.width / 2, 0);
                    cropImage = cropContext.getImageData(0, 0, image.width / 2, image.height);
                    gl.texImage2D(glBindType, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, cropImage);

                    // Set parameters for rendering any size
                    gl.texParameteri(glBindType, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
                    gl.texParameteri(glBindType, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
                    gl.texParameteri(glBindType, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
                    gl.texParameteri(glBindType, gl.TEXTURE_MAG_FILTER, gl.LINEAR);

                    // Reactivate first texture unit
                    gl.activeTexture(gl.TEXTURE0);
                }
            }

            // Set parameters for rendering any size
            gl.texParameteri(glBindType, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
            gl.texParameteri(glBindType, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
            gl.texParameteri(glBindType, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
            gl.texParameteri(glBindType, gl.TEXTURE_MAG_FILTER, gl.LINEAR);

        } else {
            // Look up vertex coordinates location
            program.vertPosLocation = gl.getAttribLocation(program, 'a_vertCoord');
            gl.enableVertexAttribArray(program.vertPosLocation);

            // Create buffers
            if (!cubeVertBuf)
                cubeVertBuf = gl.createBuffer();
            if (!cubeVertTexCoordBuf)
                cubeVertTexCoordBuf = gl.createBuffer();
            if (!cubeVertIndBuf)
                cubeVertIndBuf = gl.createBuffer();

            // Bind texture coordinate buffer and pass coordinates to WebGL
            gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertTexCoordBuf);
            gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0,0,1,0,1,1,0,1]), gl.STATIC_DRAW);

            // Bind square index buffer and pass indicies to WebGL
            gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertIndBuf);
            gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([0,1,2,0,2,3]), gl.STATIC_DRAW);

            // Find uniforms
            program.perspUniform = gl.getUniformLocation(program, 'u_perspMatrix');
            program.cubeUniform = gl.getUniformLocation(program, 'u_cubeMatrix');
            //program.colorUniform = gl.getUniformLocation(program, 'u_color');

            program.level = -1;

            program.currentNodes = [];
            program.nodeCache = [];
            program.nodeCacheTimestamp = 0;
        }

        // Check if there was an error
        var err = gl.getError();
        if (err !== 0) {
            console.log('Error: Something went wrong with WebGL!', err);
            throw {type: 'webgl error'};
        }

        callback();
     };

    /**
     * Destroy renderer.
     * @memberof Renderer
     * @instance
     */
    this.destroy = function() {
        if (container !== undefined) {
            if (canvas !== undefined && container.contains(canvas)) {
                container.removeChild(canvas);
            }
            if (world !== undefined && container.contains(world)) {
                container.removeChild(world);
            }
        }
        if (gl) {
            // The spec says this is only supposed to simulate losing the WebGL
            // context, but in practice it tends to actually free the memory.
            var extension = gl.getExtension('WEBGL_lose_context');
            if (extension)
                extension.loseContext();
        }
    };

    /**
     * Resize renderer (call after resizing container).
     * @memberof Renderer
     * @instance
     */
    this.resize = function() {
        var pixelRatio = window.devicePixelRatio || 1;
        canvas.width = canvas.clientWidth * pixelRatio;
        canvas.height = canvas.clientHeight * pixelRatio;
        if (gl) {
            if (gl.getError() == 1286)
                handleWebGLError1286();
            gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
            if (imageType != 'multires') {
                gl.uniform1f(program.aspectRatio, canvas.clientWidth / canvas.clientHeight);
            }
        }
    };
    // Initialize canvas size
    this.resize();

    /**
     * Set renderer horizon pitch and roll.
     * @memberof Renderer
     * @instance
     */
    this.setPose = function(horizonPitch, horizonRoll) {
        pose = [horizonPitch, horizonRoll];
    };

    /**
     * Render new view of panorama.
     * @memberof Renderer
     * @instance
     * @param {number} pitch - Pitch to render at (in radians).
     * @param {number} yaw - Yaw to render at (in radians).
     * @param {number} hfov - Horizontal field of view to render with (in radians).
     * @param {Object} [params] - Extra configuration parameters. 
     * @param {number} [params.roll] - Camera roll (in radians).
     * @param {boolean} [params.returnImage] - Return rendered image?
     */
    this.render = function(pitch, yaw, hfov, params) {
        var focal, i, s, roll = 0;
        if (params === undefined)
            params = {};
        if (params.roll)
            roll = params.roll;

        // Apply pitch and roll transformation if applicable
        if (pose !== undefined) {
            var horizonPitch = pose[0],
                horizonRoll = pose[1];

            // Calculate new pitch and yaw
            var orig_pitch = pitch,
                orig_yaw = yaw,
                x = Math.cos(horizonRoll) * Math.sin(pitch) * Math.sin(horizonPitch) +
                    Math.cos(pitch) * (Math.cos(horizonPitch) * Math.cos(yaw) +
                    Math.sin(horizonRoll) * Math.sin(horizonPitch) * Math.sin(yaw)),
                y = -Math.sin(pitch) * Math.sin(horizonRoll) +
                    Math.cos(pitch) * Math.cos(horizonRoll) * Math.sin(yaw),
                z = Math.cos(horizonRoll) * Math.cos(horizonPitch) * Math.sin(pitch) +
                    Math.cos(pitch) * (-Math.cos(yaw) * Math.sin(horizonPitch) +
                    Math.cos(horizonPitch) * Math.sin(horizonRoll) * Math.sin(yaw));
            pitch = Math.asin(Math.max(Math.min(z, 1), -1));
            yaw = Math.atan2(y, x);

            // Calculate roll
            var v = [Math.cos(orig_pitch) * (Math.sin(horizonRoll) * Math.sin(horizonPitch) * Math.cos(orig_yaw) -
                    Math.cos(horizonPitch) * Math.sin(orig_yaw)),
                    Math.cos(orig_pitch) * Math.cos(horizonRoll) * Math.cos(orig_yaw),
                    Math.cos(orig_pitch) * (Math.cos(horizonPitch) * Math.sin(horizonRoll) * Math.cos(orig_yaw) +
                    Math.sin(orig_yaw) * Math.sin(horizonPitch))],
                w = [-Math.cos(pitch) * Math.sin(yaw), Math.cos(pitch) * Math.cos(yaw)];
            var roll_adj = Math.acos(Math.max(Math.min((v[0]*w[0] + v[1]*w[1]) /
                (Math.sqrt(v[0]*v[0]+v[1]*v[1]+v[2]*v[2]) *
                Math.sqrt(w[0]*w[0]+w[1]*w[1])), 1), -1));
            if (v[2] < 0)
                roll_adj = 2 * Math.PI - roll_adj;
            roll += roll_adj;
        }

        // If no WebGL
        if (!gl && (imageType == 'multires' || imageType == 'cubemap')) {
            // Determine face transforms
            s = fallbackImgSize / 2;
            
            var transforms = {
                f: 'translate3d(-' + (s + 2) + 'px, -' + (s + 2) + 'px, -' + s + 'px)',
                b: 'translate3d(' + (s + 2) + 'px, -' + (s + 2) + 'px, ' + s + 'px) rotateX(180deg) rotateZ(180deg)',
                u: 'translate3d(-' + (s + 2) + 'px, -' + s + 'px, ' + (s + 2) + 'px) rotateX(270deg)',
                d: 'translate3d(-' + (s + 2) + 'px, ' + s + 'px, -' + (s + 2) + 'px) rotateX(90deg)',
                l: 'translate3d(-' + s + 'px, -' + (s + 2) + 'px, ' + (s + 2) + 'px) rotateX(180deg) rotateY(90deg) rotateZ(180deg)',
                r: 'translate3d(' + s + 'px, -' + (s + 2) + 'px, -' + (s + 2) + 'px) rotateY(270deg)'
            };
            focal = 1 / Math.tan(hfov / 2);
            var zoom = focal * canvas.clientWidth / 2 + 'px';
            var transform = 'perspective(' + zoom + ') translateZ(' + zoom + ') rotateX(' + pitch + 'rad) rotateY(' + yaw + 'rad) ';
            
            // Apply face transforms
            var faces = Object.keys(transforms);
            for (i = 0; i < 6; i++) {
                var face = world.querySelector('.pnlm-' + faces[i] + 'face');
                if (!face)
                    continue; // ignore missing face to support partial cubemap/fallback image
                face.style.webkitTransform = transform + transforms[faces[i]];
                face.style.transform = transform + transforms[faces[i]];
            }
            return;
        }
        
        if (imageType != 'multires') {
            // Calculate focal length from vertical field of view
            var vfov = 2 * Math.atan(Math.tan(hfov * 0.5) / (gl.drawingBufferWidth / gl.drawingBufferHeight));
            focal = 1 / Math.tan(vfov * 0.5);

            // Pass psi, theta, roll, and focal length
            gl.uniform1f(program.psi, yaw);
            gl.uniform1f(program.theta, pitch);
            gl.uniform1f(program.rot, roll);
            gl.uniform1f(program.f, focal);
            
            if (dynamic === true) {
                // Update texture if dynamic
                if (imageType == 'equirectangular') {
                    gl.bindTexture(gl.TEXTURE_2D, program.texture);
                    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, image);
                }
            }
            
            // Draw using current buffer
            gl.drawArrays(gl.TRIANGLES, 0, 6);
        
        } else {
            // Create perspective matrix
            var perspMatrix = makePersp(hfov, gl.drawingBufferWidth / gl.drawingBufferHeight, 0.1, 100.0);
            
            // Find correct zoom level
            checkZoom(hfov);
            
            // Create rotation matrix
            var matrix = identityMatrix3();
            matrix = rotateMatrix(matrix, -roll, 'z');
            matrix = rotateMatrix(matrix, -pitch, 'x');
            matrix = rotateMatrix(matrix, yaw, 'y');
            matrix = makeMatrix4(matrix);
            
            // Set matrix uniforms
            gl.uniformMatrix4fv(program.perspUniform, false, new Float32Array(transposeMatrix4(perspMatrix)));
            gl.uniformMatrix4fv(program.cubeUniform, false, new Float32Array(transposeMatrix4(matrix)));
            
            // Find current nodes
            var rotPersp = rotatePersp(perspMatrix, matrix);
            program.nodeCache.sort(multiresNodeSort);
            if (program.nodeCache.length > 200 &&
                program.nodeCache.length > program.currentNodes.length + 50) {
                // Remove older nodes from cache
                var removed = program.nodeCache.splice(200, program.nodeCache.length - 200);
                for (var j = 0; j < removed.length; j++) {
                    // Explicitly delete textures
                    gl.deleteTexture(removed[j].texture);
                }
            }
            program.currentNodes = [];
            
            var sides = ['f', 'b', 'u', 'd', 'l', 'r'];
            for (s = 0; s < 6; s++) {
                var ntmp = new MultiresNode(vtmps[s], sides[s], 1, 0, 0, image.fullpath);
                testMultiresNode(rotPersp, ntmp, pitch, yaw, hfov);
            }
            
            program.currentNodes.sort(multiresNodeRenderSort);
            
            // Unqueue any pending requests for nodes that are no longer visible
            for (i = pendingTextureRequests.length - 1; i >= 0; i--) {
                if (program.currentNodes.indexOf(pendingTextureRequests[i].node) === -1) {
                    pendingTextureRequests[i].node.textureLoad = false;
                    pendingTextureRequests.splice(i, 1);
                }
            }
            
            // Allow one request to be pending, so that we can create a texture buffer for that in advance of loading actually beginning
            if (pendingTextureRequests.length === 0) {
                for (i = 0; i < program.currentNodes.length; i++) {
                    var node = program.currentNodes[i];
                    if (!node.texture && !node.textureLoad) {
                        node.textureLoad = true;
            
                        setTimeout(processNextTile, 0, node);
                        
                        // Only process one tile per frame to improve responsiveness
                        break;
                    }
                }
            }
            
            // Draw tiles
            multiresDraw();
        }
        
        if (params.returnImage !== undefined) {
            return canvas.toDataURL('image/png');
        }
    };
    
    /**
     * Check if images are loading.
     * @memberof Renderer
     * @instance
     * @returns {boolean} Whether or not images are loading.
     */
    this.isLoading = function() {
        if (gl && imageType == 'multires') {
            for ( var i = 0; i < program.currentNodes.length; i++ ) {
                if (!program.currentNodes[i].textureLoaded) {
                    return true;
                }
            }
        }
        return false;
    };
    
    /**
     * Retrieve renderer's canvas.
     * @memberof Renderer
     * @instance
     * @returns {HTMLElement} Renderer's canvas.
     */
    this.getCanvas = function() {
        return canvas;
    };
    
    /**
     * Sorting method for multires nodes.
     * @private
     * @param {MultiresNode} a - First node.
     * @param {MultiresNode} b - Second node.
     * @returns {number} Base tiles first, then higher timestamp first.
     */
    function multiresNodeSort(a, b) {
        // Base tiles are always first
        if (a.level == 1 && b.level != 1) {
            return -1;
        }
        if (b. level == 1 && a.level != 1) {
            return 1;
        }
        
        // Higher timestamp first
        return b.timestamp - a.timestamp;
    }
    
    /**
     * Sorting method for multires node rendering.
     * @private
     * @param {MultiresNode} a - First node.
     * @param {MultiresNode} b - Second node.
     * @returns {number} Lower zoom levels first, then closest to center first.
     */
    function multiresNodeRenderSort(a, b) {
        // Lower zoom levels first
        if (a.level != b.level) {
            return a.level - b.level;
        }
        
        // Lower distance from center first
        return a.diff - b.diff;
    }
    
    /**
     * Draws multires nodes.
     * @private
     */
    function multiresDraw() {
        if (!program.drawInProgress) {
            program.drawInProgress = true;
            gl.clear(gl.COLOR_BUFFER_BIT);
            for ( var i = 0; i < program.currentNodes.length; i++ ) {
                if (program.currentNodes[i].textureLoaded > 1) {
                    //var color = program.currentNodes[i].color;
                    //gl.uniform4f(program.colorUniform, color[0], color[1], color[2], 1.0);
                    
                    // Bind vertex buffer and pass vertices to WebGL
                    gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertBuf);
                    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(program.currentNodes[i].vertices), gl.STATIC_DRAW);
                    gl.vertexAttribPointer(program.vertPosLocation, 3, gl.FLOAT, false, 0, 0);
                    
                    // Prep for texture
                    gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertTexCoordBuf);
                    gl.vertexAttribPointer(program.texCoordLocation, 2, gl.FLOAT, false, 0, 0);
                    
                    // Bind texture and draw tile
                    gl.bindTexture(gl.TEXTURE_2D, program.currentNodes[i].texture); // Bind program.currentNodes[i].texture to TEXTURE0
                    gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
                }
            }
            program.drawInProgress = false;
        }
    }

    /**
     * Creates new multires node.
     * @constructor
     * @private
     * @param {number[]} vertices - Node's verticies.
     * @param {string} side - Node's cube face.
     * @param {number} level - Node's zoom level.
     * @param {number} x - Node's x position.
     * @param {number} y - Node's y position.
     * @param {string} path - Node's path.
     */
    function MultiresNode(vertices, side, level, x, y, path) {
        this.vertices = vertices;
        this.side = side;
        this.level = level;
        this.x = x;
        this.y = y;
        this.path = path.replace('%s',side).replace('%l',level).replace('%x',x).replace('%y',y);
    }

    /**
     * Test if multires node is visible. If it is, add it to current nodes,
     * load its texture, and load appropriate child nodes.
     * @private
     * @param {number[]} rotPersp - Rotated perspective matrix.
     * @param {MultiresNode} node - Multires node to check.
     * @param {number} pitch - Pitch to check at.
     * @param {number} yaw - Yaw to check at.
     * @param {number} hfov - Horizontal field of view to check at.
     */
    function testMultiresNode(rotPersp, node, pitch, yaw, hfov) {
        if (checkSquareInView(rotPersp, node.vertices)) {
            // Calculate central angle between center of view and center of tile
            var v = node.vertices;
            var x = v[0] + v[3] + v[6] + v[ 9];
            var y = v[1] + v[4] + v[7] + v[10];
            var z = v[2] + v[5] + v[8] + v[11];
            var r = Math.sqrt(x*x + y*y + z*z);
            var theta = Math.asin(z / r);
            var phi = Math.atan2(y, x);
            var ydiff = phi - yaw;
            ydiff += (ydiff > Math.PI) ? -2 * Math.PI : (ydiff < -Math.PI) ? 2 * Math.PI : 0;
            ydiff = Math.abs(ydiff);
            node.diff = Math.acos(Math.sin(pitch) * Math.sin(theta) + Math.cos(pitch) * Math.cos(theta) * Math.cos(ydiff));
            
            // Add node to current nodes and load texture if needed
            var inCurrent = false;
            for (var k = 0; k < program.nodeCache.length; k++) {
                if (program.nodeCache[k].path == node.path) {
                    inCurrent = true;
                    program.nodeCache[k].timestamp = program.nodeCacheTimestamp++;
                    program.nodeCache[k].diff = node.diff;
                    program.currentNodes.push(program.nodeCache[k]);
                    break;
                }
            }
            if (!inCurrent) {
                //node.color = [Math.random(), Math.random(), Math.random()];
                node.timestamp = program.nodeCacheTimestamp++;
                program.currentNodes.push(node);
                program.nodeCache.push(node);
            }
            
            // TODO: Test error
            // Create child nodes
            if (node.level < program.level) {
                var cubeSize = image.cubeResolution * Math.pow(2, node.level - image.maxLevel);
                var numTiles = Math.ceil(cubeSize * image.invTileResolution) - 1;
                var doubleTileSize = cubeSize % image.tileResolution * 2;
                var lastTileSize = (cubeSize * 2) % image.tileResolution;
                if (lastTileSize === 0) {
                    lastTileSize = image.tileResolution;
                }
                if (doubleTileSize === 0) {
                    doubleTileSize = image.tileResolution * 2;
                }
                var f = 0.5;
                if (node.x == numTiles || node.y == numTiles) {
                    f = 1.0 - image.tileResolution / (image.tileResolution + lastTileSize);
                }
                var i = 1.0 - f;
                var children = [];
                var vtmp, ntmp;
                var f1 = f, f2 = f, f3 = f, i1 = i, i2 = i, i3 = i;
                // Handle non-symmetric tiles
                if (lastTileSize < image.tileResolution) {
                    if (node.x == numTiles && node.y != numTiles) {
                        f2 = 0.5;
                        i2 = 0.5;
                        if (node.side == 'd' || node.side == 'u') {
                            f3 = 0.5;
                            i3 = 0.5;
                        }
                    } else if (node.x != numTiles && node.y == numTiles) {
                        f1 = 0.5;
                        i1 = 0.5;
                        if (node.side == 'l' || node.side == 'r') {
                            f3 = 0.5;
                            i3 = 0.5;
                        }
                    }
                }
                // Handle small tiles that have fewer than four children
                if (doubleTileSize <= image.tileResolution) {
                    if (node.x == numTiles) {
                        f1 = 0;
                        i1 = 1;
                        if (node.side == 'l' || node.side == 'r') {
                            f3 = 0;
                            i3 = 1;
                        }
                    }
                    if (node.y == numTiles) {
                        f2 = 0;
                        i2 = 1;
                        if (node.side == 'd' || node.side == 'u') {
                            f3 = 0;
                            i3 = 1;
                        }
                    }
                }
                
                vtmp = [           v[0],             v[1],             v[2],
                        v[0]*f1+v[3]*i1,    v[1]*f+v[4]*i,  v[2]*f3+v[5]*i3,
                        v[0]*f1+v[6]*i1,  v[1]*f2+v[7]*i2,  v[2]*f3+v[8]*i3,
                          v[0]*f+v[9]*i, v[1]*f2+v[10]*i2, v[2]*f3+v[11]*i3
                ];
                ntmp = new MultiresNode(vtmp, node.side, node.level + 1, node.x*2, node.y*2, image.fullpath);
                children.push(ntmp);
                if (!(node.x == numTiles && doubleTileSize <= image.tileResolution)) {
                    vtmp = [v[0]*f1+v[3]*i1,    v[1]*f+v[4]*i,  v[2]*f3+v[5]*i3,
                                       v[3],             v[4],             v[5],
                              v[3]*f+v[6]*i,  v[4]*f2+v[7]*i2,  v[5]*f3+v[8]*i3,
                            v[0]*f1+v[6]*i1,  v[1]*f2+v[7]*i2,  v[2]*f3+v[8]*i3
                    ];
                    ntmp = new MultiresNode(vtmp, node.side, node.level + 1, node.x*2+1, node.y*2, image.fullpath);
                    children.push(ntmp);
                }
                if (!(node.x == numTiles && doubleTileSize <= image.tileResolution) &&
                    !(node.y == numTiles && doubleTileSize <= image.tileResolution)) {
                    vtmp = [v[0]*f1+v[6]*i1,  v[1]*f2+v[7]*i2,  v[2]*f3+v[8]*i3,
                              v[3]*f+v[6]*i,  v[4]*f2+v[7]*i2,  v[5]*f3+v[8]*i3,
                                       v[6],             v[7],             v[8],
                            v[9]*f1+v[6]*i1,   v[10]*f+v[7]*i, v[11]*f3+v[8]*i3
                    ];
                    ntmp = new MultiresNode(vtmp, node.side, node.level + 1, node.x*2+1, node.y*2+1, image.fullpath);
                    children.push(ntmp);
                }
                if (!(node.y == numTiles && doubleTileSize <= image.tileResolution)) {
                    vtmp = [  v[0]*f+v[9]*i, v[1]*f2+v[10]*i2, v[2]*f3+v[11]*i3,
                            v[0]*f1+v[6]*i1,  v[1]*f2+v[7]*i2,  v[2]*f3+v[8]*i3,
                            v[9]*f1+v[6]*i1,   v[10]*f+v[7]*i, v[11]*f3+v[8]*i3,
                                       v[9],            v[10],            v[11]
                    ];
                    ntmp = new MultiresNode(vtmp, node.side, node.level + 1, node.x*2, node.y*2+1, image.fullpath);
                    children.push(ntmp);
                }
                for (var j = 0; j < children.length; j++) {
                    testMultiresNode(rotPersp, children[j], pitch, yaw, hfov);
                }
            }
        }
    }
    
    /**
     * Creates cube vertex array.
     * @private
     * @returns {number[]} Cube vertex array.
     */
    function createCube() {
        return [-1,  1, -1,  1,  1, -1,  1, -1, -1, -1, -1, -1, // Front face
                 1,  1,  1, -1,  1,  1, -1, -1,  1,  1, -1,  1, // Back face
                -1,  1,  1,  1,  1,  1,  1,  1, -1, -1,  1, -1, // Up face
                -1, -1, -1,  1, -1, -1,  1, -1,  1, -1, -1,  1, // Down face
                -1,  1,  1, -1,  1, -1, -1, -1, -1, -1, -1,  1, // Left face
                 1,  1, -1,  1,  1,  1,  1, -1,  1,  1, -1, -1  // Right face
        ];
    }
    
    /**
     * Creates 3x3 identity matrix.
     * @private
     * @returns {number[]} Identity matrix.
     */
    function identityMatrix3() {
        return [
            1, 0, 0,
            0, 1, 0,
            0, 0, 1
        ];
    }
    
    /**
     * Rotates a 3x3 matrix.
     * @private
     * @param {number[]} m - Matrix to rotate.
     * @param {number[]} angle - Angle to rotate by in radians.
     * @param {string} axis - Axis to rotate about (`x`, `y`, or `z`).
     * @returns {number[]} Rotated matrix.
     */
    function rotateMatrix(m, angle, axis) {
        var s = Math.sin(angle);
        var c = Math.cos(angle);
        if (axis == 'x') {
            return [
                m[0], c*m[1] + s*m[2], c*m[2] - s*m[1],
                m[3], c*m[4] + s*m[5], c*m[5] - s*m[4],
                m[6], c*m[7] + s*m[8], c*m[8] - s*m[7]
            ];
        }
        if (axis == 'y') {
            return [
                c*m[0] - s*m[2], m[1], c*m[2] + s*m[0],
                c*m[3] - s*m[5], m[4], c*m[5] + s*m[3],
                c*m[6] - s*m[8], m[7], c*m[8] + s*m[6]
            ];
        }
        if (axis == 'z') {
            return [
                c*m[0] + s*m[1], c*m[1] - s*m[0], m[2],
                c*m[3] + s*m[4], c*m[4] - s*m[3], m[5],
                c*m[6] + s*m[7], c*m[7] - s*m[6], m[8]
            ];
        }
    }
    
    /**
     * Turns a 3x3 matrix into a 4x4 matrix.
     * @private
     * @param {number[]} m - Input matrix.
     * @returns {number[]} Expanded matrix.
     */
    function makeMatrix4(m) {
        return [
            m[0], m[1], m[2],    0,
            m[3], m[4], m[5],    0,
            m[6], m[7], m[8],    0,
               0,    0,    0,    1
        ];
    }
    
    /**
     * Transposes a 4x4 matrix.
     * @private
     * @param {number[]} m - Input matrix.
     * @returns {number[]} Transposed matrix.
     */
    function transposeMatrix4(m) {
        return [
            m[ 0], m[ 4], m[ 8], m[12],
            m[ 1], m[ 5], m[ 9], m[13],
            m[ 2], m[ 6], m[10], m[14],
            m[ 3], m[ 7], m[11], m[15]
        ];
    }
    
    /**
     * Creates a perspective matrix.
     * @private
     * @param {number} hfov - Desired horizontal field of view.
     * @param {number} aspect - Desired aspect ratio.
     * @param {number} znear - Near distance.
     * @param {number} zfar - Far distance.
     * @returns {number[]} Generated perspective matrix.
     */
    function makePersp(hfov, aspect, znear, zfar) {
        var fovy = 2 * Math.atan(Math.tan(hfov/2) * gl.drawingBufferHeight / gl.drawingBufferWidth);
        var f = 1 / Math.tan(fovy/2);
        return [
            f/aspect,   0,  0,  0,
                   0,   f,  0,  0,
                   0,   0,  (zfar+znear)/(znear-zfar), (2*zfar*znear)/(znear-zfar),
                   0,   0, -1,  0
        ];
    }
    
    /**
     * Processes a loaded texture image into a WebGL texture.
     * @private
     * @param {Image} img - Input image.
     * @param {WebGLTexture} tex - Texture to bind image to.
     */
    function processLoadedTexture(img, tex) {
        gl.bindTexture(gl.TEXTURE_2D, tex);
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, img);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
        gl.bindTexture(gl.TEXTURE_2D, null);
    }
    
    var pendingTextureRequests = [];

    // Based on http://blog.tojicode.com/2012/03/javascript-memory-optimization-and.html
    var loadTexture = (function() {
        var cacheTop = 4;   // Maximum number of concurrents loads
        var textureImageCache = {};
        var crossOrigin;

        function TextureImageLoader() {
            var self = this;
            this.texture = this.callback = null;
            this.image = new Image();
            this.image.crossOrigin = crossOrigin ? crossOrigin : 'anonymous';
            var loadFn = (function() {
                if (self.image.width > 0 && self.image.height > 0) { // ignore missing tile to supporting partial image
                    processLoadedTexture(self.image, self.texture);
                    self.callback(self.texture, true);
                } else {
                    self.callback(self.texture, false);
                }
                releaseTextureImageLoader(self);
            });
            this.image.addEventListener('load', loadFn);
            this.image.addEventListener('error', loadFn); // ignore missing tile file to support partial image, otherwise retry loop causes high CPU load
        }

        TextureImageLoader.prototype.loadTexture = function(src, texture, callback) {
            this.texture = texture;
            this.callback = callback;
            this.image.src = src;
        };

        function PendingTextureRequest(node, src, texture, callback) {
            this.node = node;
            this.src = src;
            this.texture = texture;
            this.callback = callback;
        }

        function releaseTextureImageLoader(til) {
            if (pendingTextureRequests.length) {
                var req = pendingTextureRequests.shift();
                til.loadTexture(req.src, req.texture, req.callback);
            } else
                textureImageCache[cacheTop++] = til;
        }

        for (var i = 0; i < cacheTop; i++)
            textureImageCache[i] = new TextureImageLoader();

        return function(node, src, callback, _crossOrigin) {
            crossOrigin = _crossOrigin;
            var texture = gl.createTexture();
            if (cacheTop)
                textureImageCache[--cacheTop].loadTexture(src, texture, callback);
            else
                pendingTextureRequests.push(new PendingTextureRequest(node, src, texture, callback));
            return texture;
        };
    })();

    /**
     * Loads image and creates texture for a multires node / tile.
     * @private
     * @param {MultiresNode} node - Input node.
     */
    function processNextTile(node) {
        loadTexture(node, node.path + '.' + image.extension, function(texture, loaded) {
            node.texture = texture;
            node.textureLoaded = loaded ? 2 : 1;
        }, globalParams.crossOrigin);
    }
    
    /**
     * Finds and applies optimal multires zoom level.
     * @private
     * @param {number} hfov - Horizontal field of view to check at.
     */
    function checkZoom(hfov) {
        // Find optimal level
        var newLevel = 1;
        while ( newLevel < image.maxLevel &&
            gl.drawingBufferWidth > image.tileResolution *
            Math.pow(2, newLevel - 1) * Math.tan(hfov / 2) * 0.707 ) {
            newLevel++;
        }
        
        // Apply change
        program.level = newLevel;
    }
    
    /**
     * Rotates perspective matrix.
     * @private
     * @param {number[]} p - Perspective matrix.
     * @param {number[]} r - Rotation matrix.
     * @returns {number[]} Rotated matrix.
     */
    function rotatePersp(p, r) {
        return [
            p[ 0]*r[0], p[ 0]*r[1], p[ 0]*r[ 2],     0,
            p[ 5]*r[4], p[ 5]*r[5], p[ 5]*r[ 6],     0,
            p[10]*r[8], p[10]*r[9], p[10]*r[10], p[11],
                 -r[8],      -r[9],      -r[10],     0
        ];
    }
    
    /**
     * Applies rotated perspective matrix to a 3-vector
     * (last element is inverted).
     * @private
     * @param {number[]} m - Rotated perspective matrix.
     * @param {number[]} v - Input 3-vector.
     * @returns {number[]} Resulting 4-vector.
     */
    function applyRotPerspToVec(m, v) {
        return [
                    m[ 0]*v[0] + m[ 1]*v[1] + m[ 2]*v[2],
                    m[ 4]*v[0] + m[ 5]*v[1] + m[ 6]*v[2],
            m[11] + m[ 8]*v[0] + m[ 9]*v[1] + m[10]*v[2],
                 1/(m[12]*v[0] + m[13]*v[1] + m[14]*v[2])
        ];
    }
    
    /**
     * Checks if a vertex is visible.
     * @private
     * @param {number[]} m - Rotated perspective matrix.
     * @param {number[]} v - Input vertex.
     * @returns {number} 1 or -1 if the vertex is or is not visible,
     *      respectively.
     */
    function checkInView(m, v) {
        var vpp = applyRotPerspToVec(m, v);
        var winX = vpp[0]*vpp[3];
        var winY = vpp[1]*vpp[3];
        var winZ = vpp[2]*vpp[3];
        var ret = [0, 0, 0];
        
        if ( winX < -1 )
            ret[0] = -1;
        if ( winX > 1 )
            ret[0] = 1;
        if ( winY < -1 )
            ret[1] = -1;
        if ( winY > 1 )
            ret[1] = 1;
        if ( winZ < -1 || winZ > 1 )
            ret[2] = 1;
        return ret;
    }
    
    /**
     * Checks if a square (tile) is visible.
     * @private
     * @param {number[]} m - Rotated perspective matrix.
     * @param {number[]} v - Square's vertex array.
     * @returns {boolean} Whether or not the square is visible.
     */
    function checkSquareInView(m, v) {
        var check1 = checkInView(m, v.slice(0, 3));
        var check2 = checkInView(m, v.slice(3, 6));
        var check3 = checkInView(m, v.slice(6, 9));
        var check4 = checkInView(m, v.slice(9, 12));
        var testX = check1[0] + check2[0] + check3[0] + check4[0];
        if ( testX == -4 || testX == 4 )
            return false;
        var testY = check1[1] + check2[1] + check3[1] + check4[1];
        if ( testY == -4 || testY == 4 )
            return false;
        var testZ = check1[2] + check2[2] + check3[2] + check4[2];
        return testZ != 4;
        

    }

    /**
     * On iOS (iPhone 5c, iOS 10.3), this WebGL error occurs when the canvas is
     * too big. Unfortuately, there's no way to test for this beforehand, so we
     * reduce the canvas size if this error is thrown.
     * @private
     */
    function handleWebGLError1286() {
        console.log('Reducing canvas size due to error 1286!');
        canvas.width = Math.round(canvas.width / 2);
        canvas.height = Math.round(canvas.height / 2);
    }
}

// Vertex shader for equirectangular and cube
var v = [
'attribute vec2 a_texCoord;',
'varying vec2 v_texCoord;',

'void main() {',
    // Set position
    'gl_Position = vec4(a_texCoord, 0.0, 1.0);',
    
    // Pass the coordinates to the fragment shader
    'v_texCoord = a_texCoord;',
'}'
].join('');

// Vertex shader for multires
var vMulti = [
'attribute vec3 a_vertCoord;',
'attribute vec2 a_texCoord;',

'uniform mat4 u_cubeMatrix;',
'uniform mat4 u_perspMatrix;',

'varying mediump vec2 v_texCoord;',

'void main(void) {',
    // Set position
    'gl_Position = u_perspMatrix * u_cubeMatrix * vec4(a_vertCoord, 1.0);',
    
    // Pass the coordinates to the fragment shader
    'v_texCoord = a_texCoord;',
'}'
].join('');

// Fragment shader
var fragEquiCubeBase = [
'precision highp float;', // mediump looks bad on some mobile devices

'uniform float u_aspectRatio;',
'uniform float u_psi;',
'uniform float u_theta;',
'uniform float u_f;',
'uniform float u_h;',
'uniform float u_v;',
'uniform float u_vo;',
'uniform float u_rot;',

'const float PI = 3.14159265358979323846264;',

// Texture
'uniform sampler2D u_image0;',
'uniform sampler2D u_image1;',
'uniform bool u_splitImage;',
'uniform samplerCube u_imageCube;',

// Coordinates passed in from vertex shader
'varying vec2 v_texCoord;',

// Background color (display for partial panoramas)
'uniform vec4 u_backgroundColor;',

'void main() {',
    // Map canvas/camera to sphere
    'float x = v_texCoord.x * u_aspectRatio;',
    'float y = v_texCoord.y;',
    'float sinrot = sin(u_rot);',
    'float cosrot = cos(u_rot);',
    'float rot_x = x * cosrot - y * sinrot;',
    'float rot_y = x * sinrot + y * cosrot;',
    'float sintheta = sin(u_theta);',
    'float costheta = cos(u_theta);',
    'float a = u_f * costheta - rot_y * sintheta;',
    'float root = sqrt(rot_x * rot_x + a * a);',
    'float lambda = atan(rot_x / root, a / root) + u_psi;',
    'float phi = atan((rot_y * costheta + u_f * sintheta) / root);',
].join('\n');

// Fragment shader
var fragCube = fragEquiCubeBase + [
    // Look up color from texture
    'float cosphi = cos(phi);',
    'gl_FragColor = textureCube(u_imageCube, vec3(cosphi*sin(lambda), sin(phi), cosphi*cos(lambda)));',
'}'
].join('\n');

// Fragment shader
var fragEquirectangular = fragEquiCubeBase + [
    // Wrap image
    'lambda = mod(lambda + PI, PI * 2.0) - PI;',

    // Map texture to sphere
    'vec2 coord = vec2(lambda / PI, phi / (PI / 2.0));',

    // Look up color from texture
    // Map from [-1,1] to [0,1] and flip y-axis
    'if(coord.x < -u_h || coord.x > u_h || coord.y < -u_v + u_vo || coord.y > u_v + u_vo)',
        'gl_FragColor = u_backgroundColor;',
    'else {',
        'if(u_splitImage) {',
            // Image was split into two textures to work around texture size limits
            'if(coord.x < 0.0)',
                'gl_FragColor = texture2D(u_image0, vec2((coord.x + u_h) / u_h, (-coord.y + u_v + u_vo) / (u_v * 2.0)));',
            'else',
                'gl_FragColor = texture2D(u_image1, vec2((coord.x + u_h) / u_h - 1.0, (-coord.y + u_v + u_vo) / (u_v * 2.0)));',
        '} else {',
            'gl_FragColor = texture2D(u_image0, vec2((coord.x + u_h) / (u_h * 2.0), (-coord.y + u_v + u_vo) / (u_v * 2.0)));',
        '}',
    '}',
'}'
].join('\n');

// Fragment shader
var fragMulti = [
'varying mediump vec2 v_texCoord;',
'uniform sampler2D u_sampler;',
//'uniform mediump vec4 u_color;',

'void main(void) {',
    // Look up color from texture
    'gl_FragColor = texture2D(u_sampler, v_texCoord);',
//    'gl_FragColor = u_color;',
'}'
].join('');

return {
    renderer: function(container, image, imagetype, dynamic) {
        return new Renderer(container, image, imagetype, dynamic);
    }
};

})(window, document);
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/admin/lib/video.js?ver=1 
/**
 * @license
 * Video.js 7.18.1 <http://videojs.com/>
 * Copyright Brightcove, Inc. <https://www.brightcove.com/>
 * Available under Apache License Version 2.0
 * <https://github.com/videojs/video.js/blob/main/LICENSE>
 *
 * Includes vtt.js <https://github.com/mozilla/vtt.js>
 * Available under Apache License Version 2.0
 * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>
 */
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    * @license
    * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>
    * Copyright (c) 2014 David Björklund
    * Available under the MIT license
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t=e.div?e.div.offsetHeight:e.tagName?e.offsetHeight:0,i=e.div?e.div.offsetWidth:e.tagName?e.offsetWidth:0,n=e.div?e.div.offsetTop:e.tagName?e.offsetTop:0;return{left:(e=e.div?e.div.getBoundingClientRect():e.tagName?e.getBoundingClientRect():e).left,right:e.right,top:e.top||n,height:e.height||t,bottom:e.bottom||n+(e.height||t),width:e.width||i}},Ai.StringDecoder=function(){return{decode:function(e){if(!e)return"";if("string"!=typeof e)throw new Error("Error - expected string data.");return decodeURIComponent(encodeURIComponent(e))}}},Ai.convertCueToDOMTree=function(e,t){return e&&t?Si(e,t):null};Ai.processCues=function(n,r,e){if(!n||!r||!e)return null;for(;e.firstChild;)e.removeChild(e.firstChild);var a=n.document.createElement("div");if(a.style.position="absolute",a.style.left="0",a.style.right="0",a.style.top="0",a.style.bottom="0",a.style.margin="1.5%",e.appendChild(a),function(e){for(var t=0;t<e.length;t++)if(e[t].hasBeenReset||!e[t].displayState)return 1}(r)){var 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fi;if(n.percent("x",i[0]),n.percent("y",i[1]),!n.has("x")||!n.has("y"))break;r.set(e+"X",n.get("x")),r.set(e+"Y",n.get("y"));break;case"scroll":r.alt(e,t,["up"])}},/=/,/\s/),r.has("id")&&((t=new(n.vttjs.VTTRegion||n.window.VTTRegion)).width=r.get("width",100),t.lines=r.get("lines",3),t.regionAnchorX=r.get("regionanchorX",0),t.regionAnchorY=r.get("regionanchorY",100),t.viewportAnchorX=r.get("viewportanchorX",0),t.viewportAnchorY=r.get("viewportanchorY",100),t.scroll=r.get("scroll",""),n.onregion&&n.onregion(t),n.regionList.push({id:r.get("id"),region:t})))},/:/)}e&&(n.buffer+=n.decoder.decode(e,{stream:!0}));try{if("INITIAL"===n.state){if(!/\r\n|\n/.test(n.buffer))return this;var r,a=(r=t()).match(/^WEBVTT([ \t].*)?$/);if(!a||!a[0])throw new hi(hi.Errors.BadSignature);n.state="HEADER"}for(var s=!1;n.buffer;){if(!/\r\n|\n/.test(n.buffer))return 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t=this;try{if(t.buffer+=t.decoder.decode(),!t.cue&&"HEADER"!==t.state||(t.buffer+="\n\n",t.parse()),"INITIAL"===t.state)throw new hi(hi.Errors.BadSignature)}catch(e){t.reportOrThrowError(e)}return t.onflush&&t.onflush(),this}};var Pi=Ai,Li={"":1,lr:1,rl:1},Di={start:1,center:1,end:1,left:1,right:1,auto:1,"line-left":1,"line-right":1};function Oi(e){return"string"==typeof e&&(!!Di[e.toLowerCase()]&&e.toLowerCase())}function Ri(e,t,i){this.hasBeenReset=!1;var n="",r=!1,a=e,s=t,o=i,u=null,l="",c=!0,d="auto",h="start",p="auto",f="auto",m=100,g="center";Object.defineProperties(this,{id:{enumerable:!0,get:function(){return n},set:function(e){n=""+e}},pauseOnExit:{enumerable:!0,get:function(){return r},set:function(e){r=!!e}},startTime:{enumerable:!0,get:function(){return a},set:function(e){if("number"!=typeof e)throw new TypeError("Start time must be set to a number.");a=e,this.hasBeenReset=!0}},endTime:{enumerable:!0,get:function(){return s},set:function(e){if("number"!=typeof e)throw new TypeError("End time must be set to a number.");s=e,this.hasBeenReset=!0}},text:{enumerable:!0,get:function(){return o},set:function(e){o=""+e,this.hasBeenReset=!0}},region:{enumerable:!0,get:function(){return u},set:function(e){u=e,this.hasBeenReset=!0}},vertical:{enumerable:!0,get:function(){return l},set:function(e){e="string"==typeof(e=e)&&(!!Li[e.toLowerCase()]&&e.toLowerCase());if(!1===e)throw new SyntaxError("Vertical: an invalid or illegal direction string was specified.");l=e,this.hasBeenReset=!0}},snapToLines:{enumerable:!0,get:function(){return c},set:function(e){c=!!e,this.hasBeenReset=!0}},line:{enumerable:!0,get:function(){return d},set:function(e){if("number"!=typeof e&&"auto"!==e)throw new SyntaxError("Line: an invalid number or illegal string was specified.");d=e,this.hasBeenReset=!0}},lineAlign:{enumerable:!0,get:function(){return h},set:function(e){e=Oi(e);e&&(h=e,this.hasBeenReset=!0)}},position:{enumerable:!0,get:function(){return p},set:function(e){if(e<0||100<e)throw new Error("Position must be between 0 and 100.");p=e,this.hasBeenReset=!0}},positionAlign:{enumerable:!0,get:function(){return f},set:function(e){e=Oi(e);e&&(f=e,this.hasBeenReset=!0)}},size:{enumerable:!0,get:function(){return m},set:function(e){if(e<0||100<e)throw new Error("Size must be between 0 and 100.");m=e,this.hasBeenReset=!0}},align:{enumerable:!0,get:function(){return g},set:function(e){e=Oi(e);if(!e)throw new SyntaxError("align: an invalid or illegal alignment string was specified.");g=e,this.hasBeenReset=!0}}}),this.displayState=void 0}Ri.prototype.getCueAsHTML=function(){return WebVTT.convertCueToDOMTree(window,this.text)};var Mi=Ri,Ni={"":!0,up:!0};function Ui(e){return"number"==typeof e&&0<=e&&e<=100}function Bi(){var t=100,i=3,n=0,r=100,a=0,s=100,o="";Object.defineProperties(this,{width:{enumerable:!0,get:function(){return t},set:function(e){if(!Ui(e))throw new Error("Width must be between 0 and 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t=e.VTTCue,i=e.VTTRegion,n=Kt.VTTCue,r=Kt.VTTRegion;e.shim=function(){Kt.VTTCue=t,Kt.VTTRegion=i},e.restore=function(){Kt.VTTCue=n,Kt.VTTRegion=r},Kt.VTTCue||e.shim()});Fi.WebVTT,Fi.VTTCue,Fi.VTTRegion;var ji=function(n){function i(t,e){var i;return void 0===e&&(e=function(){}),(t=void 0===t?{}:t).reportTouchActivity=!1,(i=n.call(this,null,t,e)||this).onDurationChange_=function(e){return i.onDurationChange(e)},i.trackProgress_=function(e){return i.trackProgress(e)},i.trackCurrentTime_=function(e){return i.trackCurrentTime(e)},i.stopTrackingCurrentTime_=function(e){return i.stopTrackingCurrentTime(e)},i.disposeSourceHandler_=function(e){return i.disposeSourceHandler(e)},i.hasStarted_=!1,i.on("playing",function(){this.hasStarted_=!0}),i.on("loadstart",function(){this.hasStarted_=!1}),oi.names.forEach(function(e){e=oi[e];t&&t[e.getterName]&&(i[e.privateName]=t[e.getterName])}),i.featuresProgressEvents||i.manualProgressOn(),i.featuresTimeupdateEvents||i.manualTimeUpdatesOn(),["Text","Audio","Video"].forEach(function(e){!1===t["native"+e+"Tracks"]&&(i["featuresNative"+e+"Tracks"]=!1)}),!1===t.nativeCaptions||!1===t.nativeTextTracks?i.featuresNativeTextTracks=!1:!0!==t.nativeCaptions&&!0!==t.nativeTextTracks||(i.featuresNativeTextTracks=!0),i.featuresNativeTextTracks||i.emulateTextTracks(),i.preloadTextTracks=!1!==t.preloadTextTracks,i.autoRemoteTextTracks_=new oi.text.ListClass,i.initTrackListeners(),t.nativeControlsForTouch||i.emitTapEvents(),i.constructor&&(i.name_=i.constructor.name||"Unknown Tech"),i}mt(i,n);var e=i.prototype;return e.triggerSourceset=function(e){var t=this;this.isReady_||this.one("ready",function(){return t.setTimeout(function(){return t.triggerSourceset(e)},1)}),this.trigger({src:e,type:"sourceset"})},e.manualProgressOn=function(){this.on("durationchange",this.onDurationChange_),this.manualProgress=!0,this.one("ready",this.trackProgress_)},e.manualProgressOff=function(){this.manualProgress=!1,this.stopTrackingProgress(),this.off("durationchange",this.onDurationChange_)},e.trackProgress=function(e){this.stopTrackingProgress(),this.progressInterval=this.setInterval(Ve(this,function(){var e=this.bufferedPercent();this.bufferedPercent_!==e&&this.trigger("progress"),1===(this.bufferedPercent_=e)&&this.stopTrackingProgress()}),500)},e.onDurationChange=function(e){this.duration_=this.duration()},e.buffered=function(){return vt(0,0)},e.bufferedPercent=function(){return _t(this.buffered(),this.duration_)},e.stopTrackingProgress=function(){this.clearInterval(this.progressInterval)},e.manualTimeUpdatesOn=function(){this.manualTimeUpdates=!0,this.on("play",this.trackCurrentTime_),this.on("pause",this.stopTrackingCurrentTime_)},e.manualTimeUpdatesOff=function(){this.manualTimeUpdates=!1,this.stopTrackingCurrentTime(),this.off("play",this.trackCurrentTime_),this.off("pause",this.stopTrackingCurrentTime_)},e.trackCurrentTime=function(){this.currentTimeInterval&&this.stopTrackingCurrentTime(),this.currentTimeInterval=this.setInterval(function(){this.trigger({type:"timeupdate",target:this,manuallyTriggered:!0})},250)},e.stopTrackingCurrentTime=function(){this.clearInterval(this.currentTimeInterval),this.trigger({type:"timeupdate",target:this,manuallyTriggered:!0})},e.dispose=function(){this.clearTracks(ai.names),this.manualProgress&&this.manualProgressOff(),this.manualTimeUpdates&&this.manualTimeUpdatesOff(),n.prototype.dispose.call(this)},e.clearTracks=function(e){var r=this;(e=[].concat(e)).forEach(function(e){for(var t=r[e+"Tracks"]()||[],i=t.length;i--;){var n=t[i];"text"===e&&r.removeRemoteTextTrack(n),t.removeTrack(n)}})},e.cleanupAutoTextTracks=function(){for(var e=this.autoRemoteTextTracks_||[],t=e.length;t--;){var i=e[t];this.removeRemoteTextTrack(i)}},e.reset=function(){},e.crossOrigin=function(){},e.setCrossOrigin=function(){},e.error=function(e){return void 0!==e&&(this.error_=new bt(e),this.trigger("error")),this.error_},e.played=function(){return this.hasStarted_?vt(0,0):vt()},e.play=function(){},e.setScrubbing=function(){},e.scrubbing=function(){},e.setCurrentTime=function(){this.manualTimeUpdates&&this.trigger({type:"timeupdate",target:this,manuallyTriggered:!0})},e.initTrackListeners=function(){var r=this;ai.names.forEach(function(e){function t(){r.trigger(e+"trackchange")}var i=ai[e],n=r[i.getterName]();n.addEventListener("removetrack",t),n.addEventListener("addtrack",t),r.on("dispose",function(){n.removeEventListener("removetrack",t),n.removeEventListener("addtrack",t)})})},e.addWebVttScript_=function(){var e,t=this;window.WebVTT||(document.body.contains(this.el())?!this.options_["vtt.js"]&&S(Fi)&&0<Object.keys(Fi).length?this.trigger("vttjsloaded"):((e=document.createElement("script")).src=this.options_["vtt.js"]||"https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js",e.onload=function(){t.trigger("vttjsloaded")},e.onerror=function(){t.trigger("vttjserror")},this.on("dispose",function(){e.onload=null,e.onerror=null}),window.WebVTT=!0,this.el().parentNode.appendChild(e)):this.ready(this.addWebVttScript_))},e.emulateTextTracks=function(){function t(e){return n.addTrack(e.track)}function i(e){return n.removeTrack(e.track)}var e=this,n=this.textTracks(),r=this.remoteTextTracks();r.on("addtrack",t),r.on("removetrack",i),this.addWebVttScript_();function a(){return e.trigger("texttrackchange")}function s(){a();for(var e=0;e<n.length;e++){var t=n[e];t.removeEventListener("cuechange",a),"showing"===t.mode&&t.addEventListener("cuechange",a)}}s(),n.addEventListener("change",s),n.addEventListener("addtrack",s),n.addEventListener("removetrack",s),this.on("dispose",function(){r.off("addtrack",t),r.off("removetrack",i),n.removeEventListener("change",s),n.removeEventListener("addtrack",s),n.removeEventListener("removetrack",s);for(var e=0;e<n.length;e++)n[e].removeEventListener("cuechange",a)})},e.addTextTrack=function(e,t,i){if(!e)throw new Error("TextTrack kind is required but was not provided");return function(e,t,i,n,r){void 0===r&&(r={});var a=e.textTracks();return r.kind=t,i&&(r.label=i),n&&(r.language=n),r.tech=e,r=new oi.text.TrackClass(r),a.addTrack(r),r}(this,e,t,i)},e.createRemoteTextTrack=function(e){e=lt(e,{tech:this});return new si.remoteTextEl.TrackClass(e)},e.addRemoteTextTrack=function(e,t){var i=this,n=this.createRemoteTextTrack(e=void 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e.reject()},e.disablePictureInPicture=function(){return!0},e.setDisablePictureInPicture=function(){},e.setPoster=function(){},e.playsinline=function(){},e.setPlaysinline=function(){},e.overrideNativeAudioTracks=function(){},e.overrideNativeVideoTracks=function(){},e.canPlayType=function(){return""},i.canPlayType=function(){return""},i.canPlaySource=function(e,t){return i.canPlayType(e.type)},i.isTech=function(e){return e.prototype instanceof i||e instanceof i||e===i},i.registerTech=function(e,t){if(i.techs_||(i.techs_={}),!i.isTech(t))throw new Error("Tech "+e+" must be a Tech");if(!i.canPlayType)throw new Error("Techs must have a static canPlayType method on them");if(!i.canPlaySource)throw new Error("Techs must have a static canPlaySource method on them");return e=ut(e),i.techs_[e]=t,i.techs_[ot(e)]=t,"Tech"!==e&&i.defaultTechOrder_.push(e),t},i.getTech=function(e){if(e)return i.techs_&&i.techs_[e]?i.techs_[e]:(e=ut(e),window&&window.videojs&&window.videojs[e]?(h.warn("The "+e+" tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)"),window.videojs[e]):void 0)},i}(pt);oi.names.forEach(function(e){var t=oi[e];ji.prototype[t.getterName]=function(){return this[t.privateName]=this[t.privateName]||new t.ListClass,this[t.privateName]}}),ji.prototype.featuresVolumeControl=!0,ji.prototype.featuresMuteControl=!0,ji.prototype.featuresFullscreenResize=!1,ji.prototype.featuresPlaybackRate=!1,ji.prototype.featuresProgressEvents=!1,ji.prototype.featuresSourceset=!1,ji.prototype.featuresTimeupdateEvents=!1,ji.prototype.featuresNativeTextTracks=!1,ji.withSourceHandlers=function(r){r.registerSourceHandler=function(e,t){var i=(i=r.sourceHandlers)||(r.sourceHandlers=[]);void 0===t&&(t=i.length),i.splice(t,0,e)},r.canPlayType=function(e){for(var t,i=r.sourceHandlers||[],n=0;n<i.length;n++)if(t=i[n].canPlayType(e))return t;return""},r.selectSourceHandler=function(e,t){for(var i=r.sourceHandlers||[],n=0;n<i.length;n++)if(i[n].canHandleSource(e,t))return i[n];return null},r.canPlaySource=function(e,t){var i=r.selectSourceHandler(e,t);return i?i.canHandleSource(e,t):""};["seekable","seeking","duration"].forEach(function(e){var t=this[e];"function"==typeof t&&(this[e]=function(){return this.sourceHandler_&&this.sourceHandler_[e]?this.sourceHandler_[e].apply(this.sourceHandler_,arguments):t.apply(this,arguments)})},r.prototype),r.prototype.setSource=function(e){var t=r.selectSourceHandler(e,this.options_);t||(r.nativeSourceHandler?t=r.nativeSourceHandler:h.error("No source handler found for the current source.")),this.disposeSourceHandler(),this.off("dispose",this.disposeSourceHandler_),t!==r.nativeSourceHandler&&(this.currentSource_=e),this.sourceHandler_=t.handleSource(e,this,this.options_),this.one("dispose",this.disposeSourceHandler_)},r.prototype.disposeSourceHandler=function(){this.currentSource_&&(this.clearTracks(["audio","video"]),this.currentSource_=null),this.cleanupAutoTextTracks(),this.sourceHandler_&&(this.sourceHandler_.dispose&&this.sourceHandler_.dispose(),this.sourceHandler_=null)}},pt.registerComponent("Tech",ji),ji.registerTech("Tech",ji),ji.defaultTechOrder_=[];var Hi={},qi={},Vi={};function Wi(e,t,i){e.setTimeout(function(){return function i(n,e,r,a,s,o){void 0===n&&(n={});void 0===e&&(e=[]);void 0===s&&(s=[]);void 0===o&&(o=!1);var t=e,e=t[0],u=t.slice(1);if("string"==typeof e)i(n,Hi[e],r,a,s,o);else if(e){var l=Qi(a,e);if(!l.setSource)return s.push(l),i(n,u,r,a,s,o);l.setSource(b({},n),function(e,t){return e?i(n,u,r,a,s,o):(s.push(l),void 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e&&e.trim()?[en({src:e})]:T(e)&&"string"==typeof e.src&&e.src&&e.src.trim()?[en(e)]:[]}var Zi={opus:"video/ogg",ogv:"video/ogg",mp4:"video/mp4",mov:"video/mp4",m4v:"video/mp4",mkv:"video/x-matroska",m4a:"audio/mp4",mp3:"audio/mpeg",aac:"audio/aac",caf:"audio/x-caf",flac:"audio/flac",oga:"audio/ogg",wav:"audio/wav",m3u8:"application/x-mpegURL",jpg:"image/jpeg",jpeg:"image/jpeg",gif:"image/gif",png:"image/png",svg:"image/svg+xml",webp:"image/webp"};function en(e){var t;return e.type||(t=$i(e.src))&&(e.type=t),e}I=function(u){function e(e,t,i){var n=lt({createEl:!1},t),i=u.call(this,e,n,i)||this;if(t.playerOptions.sources&&0!==t.playerOptions.sources.length)e.src(t.playerOptions.sources);else for(var r=0,a=t.playerOptions.techOrder;r<a.length;r++){var s=ut(a[r]),o=ji.getTech(s);if((o=!s?pt.getComponent(s):o)&&o.isSupported()){e.loadTech_(s);break}}return i}return mt(e,u),e}(pt);pt.registerComponent("MediaLoader",I);C=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.handleMouseOver_=function(e){return i.handleMouseOver(e)},i.handleMouseOut_=function(e){return i.handleMouseOut(e)},i.handleClick_=function(e){return i.handleClick(e)},i.handleKeyDown_=function(e){return i.handleKeyDown(e)},i.emitTapEvents(),i.enable(),i}mt(e,n);var t=e.prototype;return t.createEl=function(e,t,i){void 0===e&&(e="div"),void 0===t&&(t={}),void 0===i&&(i={}),t=b({className:this.buildCSSClass(),tabIndex:0},t),"button"===e&&h.error("Creating a ClickableComponent with an HTML element of "+e+" is not supported; use a Button instead."),i=b({role:"button"},i),this.tabIndex_=t.tabIndex;i=$(e,t,i);return i.appendChild($("span",{className:"vjs-icon-placeholder"},{"aria-hidden":!0})),this.createControlTextEl(i),i},t.dispose=function(){this.controlTextEl_=null,n.prototype.dispose.call(this)},t.createControlTextEl=function(e){return this.controlTextEl_=$("span",{className:"vjs-control-text"},{"aria-live":"polite"}),e&&e.appendChild(this.controlTextEl_),this.controlText(this.controlText_,e),this.controlTextEl_},t.controlText=function(e,t){if(void 0===t&&(t=this.el()),void 0===e)return this.controlText_||"Need Text";var i=this.localize(e);this.controlText_=e,J(this.controlTextEl_,i),this.nonIconControl||this.player_.options_.noUITitleAttributes||t.setAttribute("title",i)},t.buildCSSClass=function(){return"vjs-control vjs-button "+n.prototype.buildCSSClass.call(this)},t.enable=function(){this.enabled_||(this.enabled_=!0,this.removeClass("vjs-disabled"),this.el_.setAttribute("aria-disabled","false"),"undefined"!=typeof this.tabIndex_&&this.el_.setAttribute("tabIndex",this.tabIndex_),this.on(["tap","click"],this.handleClick_),this.on("keydown",this.handleKeyDown_))},t.disable=function(){this.enabled_=!1,this.addClass("vjs-disabled"),this.el_.setAttribute("aria-disabled","true"),"undefined"!=typeof this.tabIndex_&&this.el_.removeAttribute("tabIndex"),this.off("mouseover",this.handleMouseOver_),this.off("mouseout",this.handleMouseOut_),this.off(["tap","click"],this.handleClick_),this.off("keydown",this.handleKeyDown_)},t.handleLanguagechange=function(){this.controlText(this.controlText_)},t.handleClick=function(e){this.options_.clickHandler&&this.options_.clickHandler.call(this,arguments)},t.handleKeyDown=function(e){ht.isEventKey(e,"Space")||ht.isEventKey(e,"Enter")?(e.preventDefault(),e.stopPropagation(),this.trigger("click")):n.prototype.handleKeyDown.call(this,e)},e}(pt);pt.registerComponent("ClickableComponent",C),pt.registerComponent("PosterImage",function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.update(),i.update_=function(e){return i.update(e)},e.on("posterchange",i.update_),i}mt(e,n);var t=e.prototype;return t.dispose=function(){this.player().off("posterchange",this.update_),n.prototype.dispose.call(this)},t.createEl=function(){return $("div",{className:"vjs-poster",tabIndex:-1})},t.update=function(e){var t=this.player().poster();this.setSrc(t),t?this.show():this.hide()},t.setSrc=function(e){this.el_.style.backgroundImage=e?'url("'+e+'")':""},t.handleClick=function(e){var t;this.player_.controls()&&(t=this.player_.usingPlugin("eme")&&this.player_.eme.sessions&&0<this.player_.eme.sessions.length,!this.player_.tech(!0)||(N||O)&&t||this.player_.tech(!0).focus(),this.player_.paused()?Et(this.player_.play()):this.player_.pause())},e}(C));var tn="#222",nn={monospace:"monospace",sansSerif:"sans-serif",serif:"serif",monospaceSansSerif:'"Andale Mono", "Lucida Console", monospace',monospaceSerif:'"Courier New", monospace',proportionalSansSerif:"sans-serif",proportionalSerif:"serif",casual:'"Comic Sans MS", Impact, fantasy',script:'"Monotype Corsiva", cursive',smallcaps:'"Andale Mono", "Lucida Console", monospace, sans-serif'};function rn(e,t){var i;if(4===e.length)i=e[1]+e[1]+e[2]+e[2]+e[3]+e[3];else{if(7!==e.length)throw new Error("Invalid color code provided, "+e+"; must be formatted as e.g. #f0e or #f604e2.");i=e.slice(1)}return"rgba("+parseInt(i.slice(0,2),16)+","+parseInt(i.slice(2,4),16)+","+parseInt(i.slice(4,6),16)+","+t+")"}function an(e,t,i){try{e.style[t]=i}catch(e){return}}pt.registerComponent("TextTrackDisplay",function(a){function e(i,e,t){function n(e){return r.updateDisplay(e)}var r=a.call(this,i,e,t)||this;return i.on("loadstart",function(e){return r.toggleDisplay(e)}),i.on("texttrackchange",n),i.on("loadedmetadata",function(e){return r.preselectTrack(e)}),i.ready(Ve(ft(r),function(){if(i.tech_&&i.tech_.featuresNativeTextTracks)this.hide();else{i.on("fullscreenchange",n),i.on("playerresize",n),window.addEventListener("orientationchange",n),i.on("dispose",function(){return window.removeEventListener("orientationchange",n)});for(var e=this.options_.playerOptions.tracks||[],t=0;t<e.length;t++)this.player_.addRemoteTextTrack(e[t],!0);this.preselectTrack()}})),r}mt(e,a);var t=e.prototype;return t.preselectTrack=function(){for(var e,t,i,n={captions:1,subtitles:1},r=this.player_.textTracks(),a=this.player_.cache_.selectedLanguage,s=0;s<r.length;s++){var o=r[s];a&&a.enabled&&a.language&&a.language===o.language&&o.kind in n?i=o.kind!==a.kind&&i||o:a&&!a.enabled?t=e=i=null:o.default&&("descriptions"!==o.kind||e?o.kind in n&&!t&&(t=o):e=o)}i?i.mode="showing":t?t.mode="showing":e&&(e.mode="showing")},t.toggleDisplay=function(){this.player_.tech_&&this.player_.tech_.featuresNativeTextTracks?this.hide():this.show()},t.createEl=function(){return a.prototype.createEl.call(this,"div",{className:"vjs-text-track-display"},{translate:"yes","aria-live":"off","aria-atomic":"true"})},t.clearDisplay=function(){"function"==typeof window.WebVTT&&window.WebVTT.processCues(window,[],this.el_)},t.updateDisplay=function(){var e=this.player_.textTracks(),t=this.options_.allowMultipleShowingTracks;if(this.clearDisplay(),t){for(var i=[],n=0;n<e.length;++n){var r=e[n];"showing"===r.mode&&i.push(r)}this.updateForTrack(i)}else{for(var a=null,s=null,o=e.length;o--;){var u=e[o];"showing"===u.mode&&("descriptions"===u.kind?a=u:s=u)}s?("off"!==this.getAttribute("aria-live")&&this.setAttribute("aria-live","off"),this.updateForTrack(s)):a&&("assertive"!==this.getAttribute("aria-live")&&this.setAttribute("aria-live","assertive"),this.updateForTrack(a))}},t.updateDisplayState=function(e){for(var t=this.player_.textTrackSettings.getValues(),i=e.activeCues,n=i.length;n--;){var r,a=i[n];a&&(r=a.displayState,t.color&&(r.firstChild.style.color=t.color),t.textOpacity&&an(r.firstChild,"color",rn(t.color||"#fff",t.textOpacity)),t.backgroundColor&&(r.firstChild.style.backgroundColor=t.backgroundColor),t.backgroundOpacity&&an(r.firstChild,"backgroundColor",rn(t.backgroundColor||"#000",t.backgroundOpacity)),t.windowColor&&(t.windowOpacity?an(r,"backgroundColor",rn(t.windowColor,t.windowOpacity)):r.style.backgroundColor=t.windowColor),t.edgeStyle&&("dropshadow"===t.edgeStyle?r.firstChild.style.textShadow="2px 2px 3px #222, 2px 2px 4px #222, 2px 2px 5px "+tn:"raised"===t.edgeStyle?r.firstChild.style.textShadow="1px 1px #222, 2px 2px #222, 3px 3px "+tn:"depressed"===t.edgeStyle?r.firstChild.style.textShadow="1px 1px #ccc, 0 1px #ccc, -1px -1px #222, 0 -1px "+tn:"uniform"===t.edgeStyle&&(r.firstChild.style.textShadow="0 0 4px #222, 0 0 4px #222, 0 0 4px #222, 0 0 4px "+tn)),t.fontPercent&&1!==t.fontPercent&&(a=window.parseFloat(r.style.fontSize),r.style.fontSize=a*t.fontPercent+"px",r.style.height="auto",r.style.top="auto"),t.fontFamily&&"default"!==t.fontFamily&&("small-caps"===t.fontFamily?r.firstChild.style.fontVariant="small-caps":r.firstChild.style.fontFamily=nn[t.fontFamily]))}},t.updateForTrack=function(e){if(Array.isArray(e)||(e=[e]),"function"==typeof window.WebVTT&&!e.every(function(e){return!e.activeCues})){for(var t=[],i=0;i<e.length;++i)for(var n=e[i],r=0;r<n.activeCues.length;++r)t.push(n.activeCues[r]);window.WebVTT.processCues(window,t,this.el_);for(var a=0;a<e.length;++a){for(var s=e[a],o=0;o<s.activeCues.length;++o){var u=s.activeCues[o].displayState;te(u,"vjs-text-track-cue"),te(u,"vjs-text-track-cue-"+(s.language||a)),s.language&&oe(u,"lang",s.language)}this.player_.textTrackSettings&&this.updateDisplayState(s)}}},e}(pt)),pt.registerComponent("LoadingSpinner",function(i){function e(){return i.apply(this,arguments)||this}return mt(e,i),e.prototype.createEl=function(){var e=this.player_.isAudio(),t=this.localize(e?"Audio Player":"Video Player"),e=$("span",{className:"vjs-control-text",textContent:this.localize("{1} is loading.",[t])}),t=i.prototype.createEl.call(this,"div",{className:"vjs-loading-spinner",dir:"ltr"});return t.appendChild(e),t},e}(pt));var sn=function(t){function e(){return t.apply(this,arguments)||this}mt(e,t);var i=e.prototype;return i.createEl=function(e,t,i){void 0===t&&(t={}),void 0===i&&(i={});i=$("button",t=b({className:this.buildCSSClass()},t),i=b({type:"button"},i));return i.appendChild($("span",{className:"vjs-icon-placeholder"},{"aria-hidden":!0})),this.createControlTextEl(i),i},i.addChild=function(e,t){void 0===t&&(t={});var i=this.constructor.name;return h.warn("Adding an actionable (user controllable) child to a Button ("+i+") is not supported; use a ClickableComponent instead."),pt.prototype.addChild.call(this,e,t)},i.enable=function(){t.prototype.enable.call(this),this.el_.removeAttribute("disabled")},i.disable=function(){t.prototype.disable.call(this),this.el_.setAttribute("disabled","disabled")},i.handleKeyDown=function(e){ht.isEventKey(e,"Space")||ht.isEventKey(e,"Enter")?e.stopPropagation():t.prototype.handleKeyDown.call(this,e)},e}(C);pt.registerComponent("Button",sn);Bt=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.mouseused_=!1,i.on("mousedown",function(e){return i.handleMouseDown(e)}),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-big-play-button"},t.handleClick=function(e){var t=this.player_.play();if(this.mouseused_&&e.clientX&&e.clientY){var i=this.player_.usingPlugin("eme")&&this.player_.eme.sessions&&0<this.player_.eme.sessions.length;return Et(t),void(!this.player_.tech(!0)||(N||O)&&i||this.player_.tech(!0).focus())}var i=this.player_.getChild("controlBar"),n=i&&i.getChild("playToggle");n?(i=function(){return n.focus()},wt(t)?t.then(i,function(){}):this.setTimeout(i,1)):this.player_.tech(!0).focus()},t.handleKeyDown=function(e){this.mouseused_=!1,n.prototype.handleKeyDown.call(this,e)},t.handleMouseDown=function(e){this.mouseused_=!0},e}(sn);Bt.prototype.controlText_="Play Video",pt.registerComponent("BigPlayButton",Bt),pt.registerComponent("CloseButton",function(i){function e(e,t){e=i.call(this,e,t)||this;return e.controlText(t&&t.controlText||e.localize("Close")),e}mt(e,i);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-close-button "+i.prototype.buildCSSClass.call(this)},t.handleClick=function(e){this.trigger({type:"close",bubbles:!1})},t.handleKeyDown=function(e){ht.isEventKey(e,"Esc")?(e.preventDefault(),e.stopPropagation(),this.trigger("click")):i.prototype.handleKeyDown.call(this,e)},e}(sn));Ft=function(n){function e(e,t){var i=n.call(this,e,t=void 0===t?{}:t)||this;return t.replay=void 0===t.replay||t.replay,i.on(e,"play",function(e){return i.handlePlay(e)}),i.on(e,"pause",function(e){return i.handlePause(e)}),t.replay&&i.on(e,"ended",function(e){return i.handleEnded(e)}),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-play-control "+n.prototype.buildCSSClass.call(this)},t.handleClick=function(e){this.player_.paused()?Et(this.player_.play()):this.player_.pause()},t.handleSeeked=function(e){this.removeClass("vjs-ended"),this.player_.paused()?this.handlePause(e):this.handlePlay(e)},t.handlePlay=function(e){this.removeClass("vjs-ended"),this.removeClass("vjs-paused"),this.addClass("vjs-playing"),this.controlText("Pause")},t.handlePause=function(e){this.removeClass("vjs-playing"),this.addClass("vjs-paused"),this.controlText("Play")},t.handleEnded=function(e){var t=this;this.removeClass("vjs-playing"),this.addClass("vjs-ended"),this.controlText("Replay"),this.one(this.player_,"seeked",function(e){return t.handleSeeked(e)})},e}(sn);Ft.prototype.controlText_="Play",pt.registerComponent("PlayToggle",Ft);function on(e,t){e=e<0?0:e;var i=Math.floor(e%60),n=Math.floor(e/60%60),r=Math.floor(e/3600),a=Math.floor(t/60%60),t=Math.floor(t/3600);return(r=0<(r=isNaN(e)||e===1/0?n=i="-":r)||0<t?r+":":"")+(n=((r||10<=a)&&n<10?"0"+n:n)+":")+(i=i<10?"0"+i:i)}var un=on;function ln(e,t){return un(e,t=void 0===t?e:t)}k=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on(e,["timeupdate","ended"],function(e){return i.updateContent(e)}),i.updateTextNode_(),i}mt(e,n);var t=e.prototype;return t.createEl=function(){var e=this.buildCSSClass(),t=n.prototype.createEl.call(this,"div",{className:e+" vjs-time-control vjs-control"}),i=$("span",{className:"vjs-control-text",textContent:this.localize(this.labelText_)+" "},{role:"presentation"});return t.appendChild(i),this.contentEl_=$("span",{className:e+"-display"},{"aria-live":"off",role:"presentation"}),t.appendChild(this.contentEl_),t},t.dispose=function(){this.contentEl_=null,this.textNode_=null,n.prototype.dispose.call(this)},t.updateTextNode_=function(e){var t=this;e=ln(e=void 0===e?0:e),this.formattedTime_!==e&&(this.formattedTime_=e,this.requestNamedAnimationFrame("TimeDisplay#updateTextNode_",function(){var e;t.contentEl_&&((e=t.textNode_)&&t.contentEl_.firstChild!==e&&(e=null,h.warn("TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.")),t.textNode_=document.createTextNode(t.formattedTime_),t.textNode_&&(e?t.contentEl_.replaceChild(t.textNode_,e):t.contentEl_.appendChild(t.textNode_)))}))},t.updateContent=function(e){},e}(pt);k.prototype.labelText_="Time",k.prototype.controlText_="Time",pt.registerComponent("TimeDisplay",k);jt=function(e){function t(){return e.apply(this,arguments)||this}mt(t,e);var i=t.prototype;return i.buildCSSClass=function(){return"vjs-current-time"},i.updateContent=function(e){var t=this.player_.ended()?this.player_.duration():this.player_.scrubbing()?this.player_.getCache().currentTime:this.player_.currentTime();this.updateTextNode_(t)},t}(k);jt.prototype.labelText_="Current Time",jt.prototype.controlText_="Current Time",pt.registerComponent("CurrentTimeDisplay",jt);j=function(n){function e(e,t){var i=n.call(this,e,t)||this,t=function(e){return i.updateContent(e)};return i.on(e,"durationchange",t),i.on(e,"loadstart",t),i.on(e,"loadedmetadata",t),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-duration"},t.updateContent=function(e){var t=this.player_.duration();this.updateTextNode_(t)},e}(k);j.prototype.labelText_="Duration",j.prototype.controlText_="Duration",pt.registerComponent("DurationDisplay",j),pt.registerComponent("TimeDivider",function(n){function e(){return n.apply(this,arguments)||this}return mt(e,n),e.prototype.createEl=function(){var e=n.prototype.createEl.call(this,"div",{className:"vjs-time-control vjs-time-divider"},{"aria-hidden":!0}),t=n.prototype.createEl.call(this,"div"),i=n.prototype.createEl.call(this,"span",{textContent:"/"});return t.appendChild(i),e.appendChild(t),e},e}(pt));f=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on(e,"durationchange",function(e){return i.updateContent(e)}),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-remaining-time"},t.createEl=function(){var e=n.prototype.createEl.call(this);return!1!==this.options_.displayNegative&&e.insertBefore($("span",{},{"aria-hidden":!0},"-"),this.contentEl_),e},t.updateContent=function(e){var t;"number"==typeof this.player_.duration()&&(t=this.player_.ended()?0:this.player_.remainingTimeDisplay?this.player_.remainingTimeDisplay():this.player_.remainingTime(),this.updateTextNode_(t))},e}(k);f.prototype.labelText_="Remaining Time",f.prototype.controlText_="Remaining Time",pt.registerComponent("RemainingTimeDisplay",f),pt.registerComponent("LiveDisplay",function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.updateShowing(),i.on(i.player(),"durationchange",function(e){return i.updateShowing(e)}),i}mt(e,n);var t=e.prototype;return t.createEl=function(){var e=n.prototype.createEl.call(this,"div",{className:"vjs-live-control vjs-control"});return this.contentEl_=$("div",{className:"vjs-live-display"},{"aria-live":"off"}),this.contentEl_.appendChild($("span",{className:"vjs-control-text",textContent:this.localize("Stream Type")+" "})),this.contentEl_.appendChild(document.createTextNode(this.localize("LIVE"))),e.appendChild(this.contentEl_),e},t.dispose=function(){this.contentEl_=null,n.prototype.dispose.call(this)},t.updateShowing=function(e){this.player().duration()===1/0?this.show():this.hide()},e}(pt));ui=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.updateLiveEdgeStatus(),i.player_.liveTracker&&(i.updateLiveEdgeStatusHandler_=function(e){return i.updateLiveEdgeStatus(e)},i.on(i.player_.liveTracker,"liveedgechange",i.updateLiveEdgeStatusHandler_)),i}mt(e,n);var t=e.prototype;return t.createEl=function(){var e=n.prototype.createEl.call(this,"button",{className:"vjs-seek-to-live-control vjs-control"});return this.textEl_=$("span",{className:"vjs-seek-to-live-text",textContent:this.localize("LIVE")},{"aria-hidden":"true"}),e.appendChild(this.textEl_),e},t.updateLiveEdgeStatus=function(){!this.player_.liveTracker||this.player_.liveTracker.atLiveEdge()?(this.setAttribute("aria-disabled",!0),this.addClass("vjs-at-live-edge"),this.controlText("Seek to live, currently playing live")):(this.setAttribute("aria-disabled",!1),this.removeClass("vjs-at-live-edge"),this.controlText("Seek to live, currently behind live"))},t.handleClick=function(){this.player_.liveTracker.seekToLiveEdge()},t.dispose=function(){this.player_.liveTracker&&this.off(this.player_.liveTracker,"liveedgechange",this.updateLiveEdgeStatusHandler_),this.textEl_=null,n.prototype.dispose.call(this)},e}(sn);ui.prototype.controlText_="Seek to live, currently playing live",pt.registerComponent("SeekToLive",ui);function cn(e,t,i){return e=Number(e),Math.min(i,Math.max(t,isNaN(e)?t:e))}li=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.handleMouseDown_=function(e){return i.handleMouseDown(e)},i.handleMouseUp_=function(e){return i.handleMouseUp(e)},i.handleKeyDown_=function(e){return i.handleKeyDown(e)},i.handleClick_=function(e){return i.handleClick(e)},i.handleMouseMove_=function(e){return i.handleMouseMove(e)},i.update_=function(e){return i.update(e)},i.bar=i.getChild(i.options_.barName),i.vertical(!!i.options_.vertical),i.enable(),i}mt(e,n);var t=e.prototype;return t.enabled=function(){return this.enabled_},t.enable=function(){this.enabled()||(this.on("mousedown",this.handleMouseDown_),this.on("touchstart",this.handleMouseDown_),this.on("keydown",this.handleKeyDown_),this.on("click",this.handleClick_),this.on(this.player_,"controlsvisible",this.update),this.playerEvent&&this.on(this.player_,this.playerEvent,this.update),this.removeClass("disabled"),this.setAttribute("tabindex",0),this.enabled_=!0)},t.disable=function(){var e;this.enabled()&&(e=this.bar.el_.ownerDocument,this.off("mousedown",this.handleMouseDown_),this.off("touchstart",this.handleMouseDown_),this.off("keydown",this.handleKeyDown_),this.off("click",this.handleClick_),this.off(this.player_,"controlsvisible",this.update_),this.off(e,"mousemove",this.handleMouseMove_),this.off(e,"mouseup",this.handleMouseUp_),this.off(e,"touchmove",this.handleMouseMove_),this.off(e,"touchend",this.handleMouseUp_),this.removeAttribute("tabindex"),this.addClass("disabled"),this.playerEvent&&this.off(this.player_,this.playerEvent,this.update),this.enabled_=!1)},t.createEl=function(e,t,i){return void 0===i&&(i={}),(t=void 0===t?{}:t).className=t.className+" vjs-slider",t=b({tabIndex:0},t),i=b({role:"slider","aria-valuenow":0,"aria-valuemin":0,"aria-valuemax":100,tabIndex:0},i),n.prototype.createEl.call(this,e,t,i)},t.handleMouseDown=function(e){var t=this.bar.el_.ownerDocument;"mousedown"===e.type&&e.preventDefault(),"touchstart"!==e.type||R||e.preventDefault(),le(),this.addClass("vjs-sliding"),this.trigger("slideractive"),this.on(t,"mousemove",this.handleMouseMove_),this.on(t,"mouseup",this.handleMouseUp_),this.on(t,"touchmove",this.handleMouseMove_),this.on(t,"touchend",this.handleMouseUp_),this.handleMouseMove(e,!0)},t.handleMouseMove=function(e){},t.handleMouseUp=function(){var e=this.bar.el_.ownerDocument;ce(),this.removeClass("vjs-sliding"),this.trigger("sliderinactive"),this.off(e,"mousemove",this.handleMouseMove_),this.off(e,"mouseup",this.handleMouseUp_),this.off(e,"touchmove",this.handleMouseMove_),this.off(e,"touchend",this.handleMouseUp_),this.update()},t.update=function(){var t=this;if(this.el_&&this.bar){var i=this.getProgress();return i===this.progress_?i:(this.progress_=i,this.requestNamedAnimationFrame("Slider#update",function(){var e=t.vertical()?"height":"width";t.bar.el().style[e]=(100*i).toFixed(2)+"%"}),i)}},t.getProgress=function(){return Number(cn(this.getPercent(),0,1).toFixed(4))},t.calculateDistance=function(e){e=pe(this.el_,e);return this.vertical()?e.y:e.x},t.handleKeyDown=function(e){ht.isEventKey(e,"Left")||ht.isEventKey(e,"Down")?(e.preventDefault(),e.stopPropagation(),this.stepBack()):ht.isEventKey(e,"Right")||ht.isEventKey(e,"Up")?(e.preventDefault(),e.stopPropagation(),this.stepForward()):n.prototype.handleKeyDown.call(this,e)},t.handleClick=function(e){e.stopPropagation(),e.preventDefault()},t.vertical=function(e){if(void 0===e)return this.vertical_||!1;this.vertical_=!!e,this.vertical_?this.addClass("vjs-slider-vertical"):this.addClass("vjs-slider-horizontal")},e}(pt);pt.registerComponent("Slider",li);function dn(e,t){return cn(e/t*100,0,100).toFixed(2)+"%"}pt.registerComponent("LoadProgressBar",function(r){function e(e,t){var i=r.call(this,e,t)||this;return i.partEls_=[],i.on(e,"progress",function(e){return i.update(e)}),i}mt(e,r);var t=e.prototype;return t.createEl=function(){var e=r.prototype.createEl.call(this,"div",{className:"vjs-load-progress"}),t=$("span",{className:"vjs-control-text"}),i=$("span",{textContent:this.localize("Loaded")}),n=document.createTextNode(": ");return this.percentageEl_=$("span",{className:"vjs-control-text-loaded-percentage",textContent:"0%"}),e.appendChild(t),t.appendChild(i),t.appendChild(n),t.appendChild(this.percentageEl_),e},t.dispose=function(){this.partEls_=null,this.percentageEl_=null,r.prototype.dispose.call(this)},t.update=function(e){var l=this;this.requestNamedAnimationFrame("LoadProgressBar#update",function(){var e=l.player_.liveTracker,t=l.player_.buffered(),e=e&&e.isLive()?e.seekableEnd():l.player_.duration(),i=l.player_.bufferedEnd(),n=l.partEls_,e=dn(i,e);l.percent_!==e&&(l.el_.style.width=e,J(l.percentageEl_,e),l.percent_=e);for(var r=0;r<t.length;r++){var a=t.start(r),s=t.end(r),o=n[r];o||(o=l.el_.appendChild($()),n[r]=o),o.dataset.start===a&&o.dataset.end===s||(o.dataset.start=a,o.dataset.end=s,o.style.left=dn(a,i),o.style.width=dn(s-a,i))}for(var u=n.length;u>t.length;u--)l.el_.removeChild(n[u-1]);n.length=t.length})},e}(pt)),pt.registerComponent("TimeTooltip",function(i){function e(e,t){t=i.call(this,e,t)||this;return t.update=We(Ve(ft(t),t.update),30),t}mt(e,i);var t=e.prototype;return t.createEl=function(){return i.prototype.createEl.call(this,"div",{className:"vjs-time-tooltip"},{"aria-hidden":"true"})},t.update=function(e,t,i){var n=he(this.el_),r=de(this.player_.el()),a=e.width*t;r&&n&&(t=e.left-r.left+a,r=e.width-a+(r.right-e.right),t<(e=n.width/2)?e+=e-t:r<e&&(e=r),e<0?e=0:e>n.width&&(e=n.width),e=Math.round(e),this.el_.style.right="-"+e+"px",this.write(i))},t.write=function(e){J(this.el_,e)},t.updateTime=function(n,r,a,s){var o=this;this.requestNamedAnimationFrame("TimeTooltip#updateTime",function(){var e,t,i=o.player_.duration();i=o.player_.liveTracker&&o.player_.liveTracker.isLive()?((t=(e=o.player_.liveTracker.liveWindow())-r*e)<1?"":"-")+ln(t,e):ln(a,i),o.update(n,r,i),s&&s()})},e}(pt));Xt=function(i){function e(e,t){t=i.call(this,e,t)||this;return t.update=We(Ve(ft(t),t.update),30),t}mt(e,i);var t=e.prototype;return t.createEl=function(){return i.prototype.createEl.call(this,"div",{className:"vjs-play-progress vjs-slider-bar"},{"aria-hidden":"true"})},t.update=function(e,t){var i,n=this.getChild("timeTooltip");n&&(i=this.player_.scrubbing()?this.player_.getCache().currentTime:this.player_.currentTime(),n.updateTime(e,t,i))},e}(pt);Xt.prototype.options_={children:[]},q||A||Xt.prototype.options_.children.push("timeTooltip"),pt.registerComponent("PlayProgressBar",Xt);I=function(i){function e(e,t){t=i.call(this,e,t)||this;return t.update=We(Ve(ft(t),t.update),30),t}mt(e,i);var t=e.prototype;return t.createEl=function(){return i.prototype.createEl.call(this,"div",{className:"vjs-mouse-display"})},t.update=function(e,t){var i=this,n=t*this.player_.duration();this.getChild("timeTooltip").updateTime(e,t,n,function(){i.el_.style.left=e.width*t+"px"})},e}(pt);I.prototype.options_={children:["timeTooltip"]},pt.registerComponent("MouseTimeDisplay",I);Bt=function(a){function e(e,t){t=a.call(this,e,t)||this;return t.setEventHandlers_(),t}mt(e,a);var t=e.prototype;return t.setEventHandlers_=function(){var t=this;this.update_=Ve(this,this.update),this.update=We(this.update_,30),this.on(this.player_,["ended","durationchange","timeupdate"],this.update),this.player_.liveTracker&&this.on(this.player_.liveTracker,"liveedgechange",this.update),this.updateInterval=null,this.enableIntervalHandler_=function(e){return t.enableInterval_(e)},this.disableIntervalHandler_=function(e){return t.disableInterval_(e)},this.on(this.player_,["playing"],this.enableIntervalHandler_),this.on(this.player_,["ended","pause","waiting"],this.disableIntervalHandler_),"hidden"in document&&"visibilityState"in document&&this.on(document,"visibilitychange",this.toggleVisibility_)},t.toggleVisibility_=function(e){"hidden"===document.visibilityState?(this.cancelNamedAnimationFrame("SeekBar#update"),this.cancelNamedAnimationFrame("Slider#update"),this.disableInterval_(e)):(this.player_.ended()||this.player_.paused()||this.enableInterval_(),this.update())},t.enableInterval_=function(){this.updateInterval||(this.updateInterval=this.setInterval(this.update,30))},t.disableInterval_=function(e){this.player_.liveTracker&&this.player_.liveTracker.isLive()&&e&&"ended"!==e.type||this.updateInterval&&(this.clearInterval(this.updateInterval),this.updateInterval=null)},t.createEl=function(){return a.prototype.createEl.call(this,"div",{className:"vjs-progress-holder"},{"aria-label":this.localize("Progress Bar")})},t.update=function(e){var n=this;if("hidden"!==document.visibilityState){var r=a.prototype.update.call(this);return this.requestNamedAnimationFrame("SeekBar#update",function(){var e=n.player_.ended()?n.player_.duration():n.getCurrentTime_(),t=n.player_.liveTracker,i=n.player_.duration();t&&t.isLive()&&(i=n.player_.liveTracker.liveCurrentTime()),n.percent_!==r&&(n.el_.setAttribute("aria-valuenow",(100*r).toFixed(2)),n.percent_=r),n.currentTime_===e&&n.duration_===i||(n.el_.setAttribute("aria-valuetext",n.localize("progress bar timing: currentTime={1} duration={2}",[ln(e,i),ln(i,i)],"{1} of {2}")),n.currentTime_=e,n.duration_=i),n.bar&&n.bar.update(de(n.el()),n.getProgress())}),r}},t.userSeek_=function(e){this.player_.liveTracker&&this.player_.liveTracker.isLive()&&this.player_.liveTracker.nextSeekedFromUser(),this.player_.currentTime(e)},t.getCurrentTime_=function(){return this.player_.scrubbing()?this.player_.getCache().currentTime:this.player_.currentTime()},t.getPercent=function(){var e,t=this.getCurrentTime_(),i=this.player_.liveTracker;return i&&i.isLive()?(e=(t-i.seekableStart())/i.liveWindow(),i.atLiveEdge()&&(e=1)):e=t/this.player_.duration(),e},t.handleMouseDown=function(e){_e(e)&&(e.stopPropagation(),this.videoWasPlaying=!this.player_.paused(),this.player_.pause(),a.prototype.handleMouseDown.call(this,e))},t.handleMouseMove=function(e,t){if(void 0===t&&(t=!1),_e(e)){t||this.player_.scrubbing()||this.player_.scrubbing(!0);var i=this.calculateDistance(e),n=this.player_.liveTracker;if(n&&n.isLive()){if(.99<=i)return void n.seekToLiveEdge();var r,t=n.seekableStart(),e=n.liveCurrentTime();if((r=(r=e<=(r=t+i*n.liveWindow())?e:r)<=t?t+.1:r)===1/0)return}else(r=i*this.player_.duration())===this.player_.duration()&&(r-=.1);this.userSeek_(r)}},t.enable=function(){a.prototype.enable.call(this);var e=this.getChild("mouseTimeDisplay");e&&e.show()},t.disable=function(){a.prototype.disable.call(this);var e=this.getChild("mouseTimeDisplay");e&&e.hide()},t.handleMouseUp=function(e){a.prototype.handleMouseUp.call(this,e),e&&e.stopPropagation(),this.player_.scrubbing(!1),this.player_.trigger({type:"timeupdate",target:this,manuallyTriggered:!0}),this.videoWasPlaying?Et(this.player_.play()):this.update_()},t.stepForward=function(){this.userSeek_(this.player_.currentTime()+5)},t.stepBack=function(){this.userSeek_(this.player_.currentTime()-5)},t.handleAction=function(e){this.player_.paused()?this.player_.play():this.player_.pause()},t.handleKeyDown=function(e){var t,i=this.player_.liveTracker;ht.isEventKey(e,"Space")||ht.isEventKey(e,"Enter")?(e.preventDefault(),e.stopPropagation(),this.handleAction(e)):ht.isEventKey(e,"Home")?(e.preventDefault(),e.stopPropagation(),this.userSeek_(0)):ht.isEventKey(e,"End")?(e.preventDefault(),e.stopPropagation(),i&&i.isLive()?this.userSeek_(i.liveCurrentTime()):this.userSeek_(this.player_.duration())):/^[0-9]$/.test(ht(e))?(e.preventDefault(),e.stopPropagation(),t=10*(ht.codes[ht(e)]-ht.codes[0])/100,i&&i.isLive()?this.userSeek_(i.seekableStart()+i.liveWindow()*t):this.userSeek_(this.player_.duration()*t)):ht.isEventKey(e,"PgDn")?(e.preventDefault(),e.stopPropagation(),this.userSeek_(this.player_.currentTime()-60)):ht.isEventKey(e,"PgUp")?(e.preventDefault(),e.stopPropagation(),this.userSeek_(this.player_.currentTime()+60)):a.prototype.handleKeyDown.call(this,e)},t.dispose=function(){this.disableInterval_(),this.off(this.player_,["ended","durationchange","timeupdate"],this.update),this.player_.liveTracker&&this.off(this.player_.liveTracker,"liveedgechange",this.update),this.off(this.player_,["playing"],this.enableIntervalHandler_),this.off(this.player_,["ended","pause","waiting"],this.disableIntervalHandler_),"hidden"in document&&"visibilityState"in document&&this.off(document,"visibilitychange",this.toggleVisibility_),a.prototype.dispose.call(this)},e}(li);Bt.prototype.options_={children:["loadProgressBar","playProgressBar"],barName:"playProgressBar"},q||A||Bt.prototype.options_.children.splice(1,0,"mouseTimeDisplay"),pt.registerComponent("SeekBar",Bt);Ft=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.handleMouseMove=We(Ve(ft(i),i.handleMouseMove),30),i.throttledHandleMouseSeek=We(Ve(ft(i),i.handleMouseSeek),30),i.handleMouseUpHandler_=function(e){return i.handleMouseUp(e)},i.handleMouseDownHandler_=function(e){return i.handleMouseDown(e)},i.enable(),i}mt(e,n);var t=e.prototype;return t.createEl=function(){return n.prototype.createEl.call(this,"div",{className:"vjs-progress-control vjs-control"})},t.handleMouseMove=function(e){var t,i,n,r,a=this.getChild("seekBar");a&&(t=a.getChild("playProgressBar"),i=a.getChild("mouseTimeDisplay"),(t||i)&&(r=he(n=a.el()),e=pe(n,e).x,e=cn(e,0,1),i&&i.update(r,e),t&&t.update(r,a.getProgress())))},t.handleMouseSeek=function(e){var t=this.getChild("seekBar");t&&t.handleMouseMove(e)},t.enabled=function(){return this.enabled_},t.disable=function(){var e;this.children().forEach(function(e){return e.disable&&e.disable()}),this.enabled()&&(this.off(["mousedown","touchstart"],this.handleMouseDownHandler_),this.off(this.el_,"mousemove",this.handleMouseMove),this.removeListenersAddedOnMousedownAndTouchstart(),this.addClass("disabled"),this.enabled_=!1,this.player_.scrubbing()&&(e=this.getChild("seekBar"),this.player_.scrubbing(!1),e.videoWasPlaying&&Et(this.player_.play())))},t.enable=function(){this.children().forEach(function(e){return e.enable&&e.enable()}),this.enabled()||(this.on(["mousedown","touchstart"],this.handleMouseDownHandler_),this.on(this.el_,"mousemove",this.handleMouseMove),this.removeClass("disabled"),this.enabled_=!0)},t.removeListenersAddedOnMousedownAndTouchstart=function(){var e=this.el_.ownerDocument;this.off(e,"mousemove",this.throttledHandleMouseSeek),this.off(e,"touchmove",this.throttledHandleMouseSeek),this.off(e,"mouseup",this.handleMouseUpHandler_),this.off(e,"touchend",this.handleMouseUpHandler_)},t.handleMouseDown=function(e){var t=this.el_.ownerDocument,i=this.getChild("seekBar");i&&i.handleMouseDown(e),this.on(t,"mousemove",this.throttledHandleMouseSeek),this.on(t,"touchmove",this.throttledHandleMouseSeek),this.on(t,"mouseup",this.handleMouseUpHandler_),this.on(t,"touchend",this.handleMouseUpHandler_)},t.handleMouseUp=function(e){var t=this.getChild("seekBar");t&&t.handleMouseUp(e),this.removeListenersAddedOnMousedownAndTouchstart()},e}(pt);Ft.prototype.options_={children:["seekBar"]},pt.registerComponent("ProgressControl",Ft);jt=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on(e,["enterpictureinpicture","leavepictureinpicture"],function(e){return i.handlePictureInPictureChange(e)}),i.on(e,["disablepictureinpicturechanged","loadedmetadata"],function(e){return i.handlePictureInPictureEnabledChange(e)}),i.disable(),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-picture-in-picture-control "+n.prototype.buildCSSClass.call(this)},t.handlePictureInPictureEnabledChange=function(){document.pictureInPictureEnabled&&!1===this.player_.disablePictureInPicture()?this.enable():this.disable()},t.handlePictureInPictureChange=function(e){this.player_.isInPictureInPicture()?this.controlText("Exit Picture-in-Picture"):this.controlText("Picture-in-Picture"),this.handlePictureInPictureEnabledChange()},t.handleClick=function(e){this.player_.isInPictureInPicture()?this.player_.exitPictureInPicture():this.player_.requestPictureInPicture()},e}(sn);jt.prototype.controlText_="Picture-in-Picture",pt.registerComponent("PictureInPictureToggle",jt);j=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on(e,"fullscreenchange",function(e){return i.handleFullscreenChange(e)}),!1===document[e.fsApi_.fullscreenEnabled]&&i.disable(),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-fullscreen-control "+n.prototype.buildCSSClass.call(this)},t.handleFullscreenChange=function(e){this.player_.isFullscreen()?this.controlText("Non-Fullscreen"):this.controlText("Fullscreen")},t.handleClick=function(e){this.player_.isFullscreen()?this.player_.exitFullscreen():this.player_.requestFullscreen()},e}(sn);j.prototype.controlText_="Fullscreen",pt.registerComponent("FullscreenToggle",j);pt.registerComponent("VolumeLevel",function(t){function e(){return t.apply(this,arguments)||this}return mt(e,t),e.prototype.createEl=function(){var e=t.prototype.createEl.call(this,"div",{className:"vjs-volume-level"});return e.appendChild(t.prototype.createEl.call(this,"span",{className:"vjs-control-text"})),e},e}(pt)),pt.registerComponent("VolumeLevelTooltip",function(i){function e(e,t){t=i.call(this,e,t)||this;return t.update=We(Ve(ft(t),t.update),30),t}mt(e,i);var t=e.prototype;return t.createEl=function(){return i.prototype.createEl.call(this,"div",{className:"vjs-volume-tooltip"},{"aria-hidden":"true"})},t.update=function(e,t,i,n){if(!i){var r=de(this.el_),a=de(this.player_.el()),i=e.width*t;if(!a||!r)return;t=e.left-a.left+i,a=e.width-i+(a.right-e.right),e=r.width/2;t<e?e+=e-t:a<e&&(e=a),e<0?e=0:e>r.width&&(e=r.width),this.el_.style.right="-"+e+"px"}this.write(n+"%")},t.write=function(e){J(this.el_,e)},t.updateVolume=function(e,t,i,n,r){var a=this;this.requestNamedAnimationFrame("VolumeLevelTooltip#updateVolume",function(){a.update(e,t,i,n.toFixed(0)),r&&r()})},e}(pt));k=function(i){function e(e,t){t=i.call(this,e,t)||this;return t.update=We(Ve(ft(t),t.update),30),t}mt(e,i);var t=e.prototype;return t.createEl=function(){return i.prototype.createEl.call(this,"div",{className:"vjs-mouse-display"})},t.update=function(e,t,i){var n=this,r=100*t;this.getChild("volumeLevelTooltip").updateVolume(e,t,i,r,function(){i?n.el_.style.bottom=e.height*t+"px":n.el_.style.left=e.width*t+"px"})},e}(pt);k.prototype.options_={children:["volumeLevelTooltip"]},pt.registerComponent("MouseVolumeLevelDisplay",k);f=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on("slideractive",function(e){return i.updateLastVolume_(e)}),i.on(e,"volumechange",function(e){return i.updateARIAAttributes(e)}),e.ready(function(){return i.updateARIAAttributes()}),i}mt(e,n);var t=e.prototype;return t.createEl=function(){return n.prototype.createEl.call(this,"div",{className:"vjs-volume-bar vjs-slider-bar"},{"aria-label":this.localize("Volume Level"),"aria-live":"polite"})},t.handleMouseDown=function(e){_e(e)&&n.prototype.handleMouseDown.call(this,e)},t.handleMouseMove=function(e){var t,i,n,r=this.getChild("mouseVolumeLevelDisplay");r&&(t=de(n=this.el()),i=this.vertical(),n=pe(n,e),n=i?n.y:n.x,n=cn(n,0,1),r.update(t,n,i)),_e(e)&&(this.checkMuted(),this.player_.volume(this.calculateDistance(e)))},t.checkMuted=function(){this.player_.muted()&&this.player_.muted(!1)},t.getPercent=function(){return this.player_.muted()?0:this.player_.volume()},t.stepForward=function(){this.checkMuted(),this.player_.volume(this.player_.volume()+.1)},t.stepBack=function(){this.checkMuted(),this.player_.volume(this.player_.volume()-.1)},t.updateARIAAttributes=function(e){var t=this.player_.muted()?0:this.volumeAsPercentage_();this.el_.setAttribute("aria-valuenow",t),this.el_.setAttribute("aria-valuetext",t+"%")},t.volumeAsPercentage_=function(){return Math.round(100*this.player_.volume())},t.updateLastVolume_=function(){var e=this,t=this.player_.volume();this.one("sliderinactive",function(){0===e.player_.volume()&&e.player_.lastVolume_(t)})},e}(li);f.prototype.options_={children:["volumeLevel"],barName:"volumeLevel"},q||A||f.prototype.options_.children.splice(0,0,"mouseVolumeLevelDisplay"),f.prototype.playerEvent="volumechange",pt.registerComponent("VolumeBar",f);ui=function(a){function e(e,t){var i,n,r;return(t=void 0===t?{}:t).vertical=t.vertical||!1,"undefined"!=typeof t.volumeBar&&!S(t.volumeBar)||(t.volumeBar=t.volumeBar||{},t.volumeBar.vertical=t.vertical),i=a.call(this,e,t)||this,n=ft(i),(r=e).tech_&&!r.tech_.featuresVolumeControl&&n.addClass("vjs-hidden"),n.on(r,"loadstart",function(){r.tech_.featuresVolumeControl?n.removeClass("vjs-hidden"):n.addClass("vjs-hidden")}),i.throttledHandleMouseMove=We(Ve(ft(i),i.handleMouseMove),30),i.handleMouseUpHandler_=function(e){return i.handleMouseUp(e)},i.on("mousedown",function(e){return i.handleMouseDown(e)}),i.on("touchstart",function(e){return i.handleMouseDown(e)}),i.on("mousemove",function(e){return i.handleMouseMove(e)}),i.on(i.volumeBar,["focus","slideractive"],function(){i.volumeBar.addClass("vjs-slider-active"),i.addClass("vjs-slider-active"),i.trigger("slideractive")}),i.on(i.volumeBar,["blur","sliderinactive"],function(){i.volumeBar.removeClass("vjs-slider-active"),i.removeClass("vjs-slider-active"),i.trigger("sliderinactive")}),i}mt(e,a);var t=e.prototype;return t.createEl=function(){var e="vjs-volume-horizontal";return this.options_.vertical&&(e="vjs-volume-vertical"),a.prototype.createEl.call(this,"div",{className:"vjs-volume-control vjs-control "+e})},t.handleMouseDown=function(e){var t=this.el_.ownerDocument;this.on(t,"mousemove",this.throttledHandleMouseMove),this.on(t,"touchmove",this.throttledHandleMouseMove),this.on(t,"mouseup",this.handleMouseUpHandler_),this.on(t,"touchend",this.handleMouseUpHandler_)},t.handleMouseUp=function(e){var t=this.el_.ownerDocument;this.off(t,"mousemove",this.throttledHandleMouseMove),this.off(t,"touchmove",this.throttledHandleMouseMove),this.off(t,"mouseup",this.handleMouseUpHandler_),this.off(t,"touchend",this.handleMouseUpHandler_)},t.handleMouseMove=function(e){this.volumeBar.handleMouseMove(e)},e}(pt);ui.prototype.options_={children:["volumeBar"]},pt.registerComponent("VolumeControl",ui);Xt=function(a){function e(e,t){var i,n,r=a.call(this,e,t)||this;return i=ft(r),(n=e).tech_&&!n.tech_.featuresMuteControl&&i.addClass("vjs-hidden"),i.on(n,"loadstart",function(){n.tech_.featuresMuteControl?i.removeClass("vjs-hidden"):i.addClass("vjs-hidden")}),r.on(e,["loadstart","volumechange"],function(e){return r.update(e)}),r}mt(e,a);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-mute-control "+a.prototype.buildCSSClass.call(this)},t.handleClick=function(e){var t=this.player_.volume(),i=this.player_.lastVolume_();0===t?(this.player_.volume(i<.1?.1:i),this.player_.muted(!1)):this.player_.muted(!this.player_.muted())},t.update=function(e){this.updateIcon_(),this.updateControlText_()},t.updateIcon_=function(){var e=this.player_.volume(),t=3;q&&this.player_.tech_&&this.player_.tech_.el_&&this.player_.muted(this.player_.tech_.el_.muted),0===e||this.player_.muted()?t=0:e<.33?t=1:e<.67&&(t=2);for(var i=0;i<4;i++)ie(this.el_,"vjs-vol-"+i);te(this.el_,"vjs-vol-"+t)},t.updateControlText_=function(){var e=this.player_.muted()||0===this.player_.volume()?"Unmute":"Mute";this.controlText()!==e&&this.controlText(e)},e}(sn);Xt.prototype.controlText_="Mute",pt.registerComponent("MuteToggle",Xt);I=function(n){function e(e,t){var i;return"undefined"!=typeof(t=void 0===t?{}:t).inline?t.inline=t.inline:t.inline=!0,"undefined"!=typeof t.volumeControl&&!S(t.volumeControl)||(t.volumeControl=t.volumeControl||{},t.volumeControl.vertical=!t.inline),(i=n.call(this,e,t)||this).handleKeyPressHandler_=function(e){return i.handleKeyPress(e)},i.on(e,["loadstart"],function(e){return i.volumePanelState_(e)}),i.on(i.muteToggle,"keyup",function(e){return i.handleKeyPress(e)}),i.on(i.volumeControl,"keyup",function(e){return i.handleVolumeControlKeyUp(e)}),i.on("keydown",function(e){return i.handleKeyPress(e)}),i.on("mouseover",function(e){return i.handleMouseOver(e)}),i.on("mouseout",function(e){return i.handleMouseOut(e)}),i.on(i.volumeControl,["slideractive"],i.sliderActive_),i.on(i.volumeControl,["sliderinactive"],i.sliderInactive_),i}mt(e,n);var t=e.prototype;return t.sliderActive_=function(){this.addClass("vjs-slider-active")},t.sliderInactive_=function(){this.removeClass("vjs-slider-active")},t.volumePanelState_=function(){this.volumeControl.hasClass("vjs-hidden")&&this.muteToggle.hasClass("vjs-hidden")&&this.addClass("vjs-hidden"),this.volumeControl.hasClass("vjs-hidden")&&!this.muteToggle.hasClass("vjs-hidden")&&this.addClass("vjs-mute-toggle-only")},t.createEl=function(){var e="vjs-volume-panel-horizontal";return this.options_.inline||(e="vjs-volume-panel-vertical"),n.prototype.createEl.call(this,"div",{className:"vjs-volume-panel vjs-control "+e})},t.dispose=function(){this.handleMouseOut(),n.prototype.dispose.call(this)},t.handleVolumeControlKeyUp=function(e){ht.isEventKey(e,"Esc")&&this.muteToggle.focus()},t.handleMouseOver=function(e){this.addClass("vjs-hover"),Be(document,"keyup",this.handleKeyPressHandler_)},t.handleMouseOut=function(e){this.removeClass("vjs-hover"),Fe(document,"keyup",this.handleKeyPressHandler_)},t.handleKeyPress=function(e){ht.isEventKey(e,"Esc")&&this.handleMouseOut()},e}(pt);I.prototype.options_={children:["muteToggle","volumeControl"]},pt.registerComponent("VolumePanel",I);var hn=function(n){function e(e,t){var i=n.call(this,e,t)||this;return t&&(i.menuButton_=t.menuButton),i.focusedChild_=-1,i.on("keydown",function(e){return i.handleKeyDown(e)}),i.boundHandleBlur_=function(e){return i.handleBlur(e)},i.boundHandleTapClick_=function(e){return i.handleTapClick(e)},i}mt(e,n);var t=e.prototype;return t.addEventListenerForItem=function(e){e instanceof pt&&(this.on(e,"blur",this.boundHandleBlur_),this.on(e,["tap","click"],this.boundHandleTapClick_))},t.removeEventListenerForItem=function(e){e instanceof pt&&(this.off(e,"blur",this.boundHandleBlur_),this.off(e,["tap","click"],this.boundHandleTapClick_))},t.removeChild=function(e){"string"==typeof e&&(e=this.getChild(e)),this.removeEventListenerForItem(e),n.prototype.removeChild.call(this,e)},t.addItem=function(e){e=this.addChild(e);e&&this.addEventListenerForItem(e)},t.createEl=function(){var e=this.options_.contentElType||"ul";this.contentEl_=$(e,{className:"vjs-menu-content"}),this.contentEl_.setAttribute("role","menu");e=n.prototype.createEl.call(this,"div",{append:this.contentEl_,className:"vjs-menu"});return e.appendChild(this.contentEl_),Be(e,"click",function(e){e.preventDefault(),e.stopImmediatePropagation()}),e},t.dispose=function(){this.contentEl_=null,this.boundHandleBlur_=null,this.boundHandleTapClick_=null,n.prototype.dispose.call(this)},t.handleBlur=function(e){var t=e.relatedTarget||document.activeElement;this.children().some(function(e){return e.el()===t})||(e=this.menuButton_)&&e.buttonPressed_&&t!==e.el().firstChild&&e.unpressButton()},t.handleTapClick=function(t){var e;this.menuButton_&&(this.menuButton_.unpressButton(),e=this.children(),!Array.isArray(e)||(e=e.filter(function(e){return e.el()===t.target})[0])&&"CaptionSettingsMenuItem"!==e.name()&&this.menuButton_.focus())},t.handleKeyDown=function(e){ht.isEventKey(e,"Left")||ht.isEventKey(e,"Down")?(e.preventDefault(),e.stopPropagation(),this.stepForward()):(ht.isEventKey(e,"Right")||ht.isEventKey(e,"Up"))&&(e.preventDefault(),e.stopPropagation(),this.stepBack())},t.stepForward=function(){var e=0;void 0!==this.focusedChild_&&(e=this.focusedChild_+1),this.focus(e)},t.stepBack=function(){var e=0;void 0!==this.focusedChild_&&(e=this.focusedChild_-1),this.focus(e)},t.focus=function(e){void 0===e&&(e=0);var t=this.children().slice();t.length&&t[0].hasClass("vjs-menu-title")&&t.shift(),0<t.length&&(e<0?e=0:e>=t.length&&(e=t.length-1),t[this.focusedChild_=e].el_.focus())},e}(pt);pt.registerComponent("Menu",hn);Bt=function(n){function e(e,t){var i;(i=n.call(this,e,t=void 0===t?{}:t)||this).menuButton_=new sn(e,t),i.menuButton_.controlText(i.controlText_),i.menuButton_.el_.setAttribute("aria-haspopup","true");t=sn.prototype.buildCSSClass();i.menuButton_.el_.className=i.buildCSSClass()+" "+t,i.menuButton_.removeClass("vjs-control"),i.addChild(i.menuButton_),i.update(),i.enabled_=!0;t=function(e){return i.handleClick(e)};return i.handleMenuKeyUp_=function(e){return i.handleMenuKeyUp(e)},i.on(i.menuButton_,"tap",t),i.on(i.menuButton_,"click",t),i.on(i.menuButton_,"keydown",function(e){return i.handleKeyDown(e)}),i.on(i.menuButton_,"mouseenter",function(){i.addClass("vjs-hover"),i.menu.show(),Be(document,"keyup",i.handleMenuKeyUp_)}),i.on("mouseleave",function(e){return i.handleMouseLeave(e)}),i.on("keydown",function(e){return i.handleSubmenuKeyDown(e)}),i}mt(e,n);var t=e.prototype;return t.update=function(){var e=this.createMenu();this.menu&&(this.menu.dispose(),this.removeChild(this.menu)),this.menu=e,this.addChild(e),this.buttonPressed_=!1,this.menuButton_.el_.setAttribute("aria-expanded","false"),this.items&&this.items.length<=this.hideThreshold_?this.hide():this.show()},t.createMenu=function(){var e,t=new hn(this.player_,{menuButton:this});if(this.hideThreshold_=0,this.options_.title&&(e=$("li",{className:"vjs-menu-title",textContent:ut(this.options_.title),tabIndex:-1}),e=new pt(this.player_,{el:e}),t.addItem(e)),this.items=this.createItems(),this.items)for(var i=0;i<this.items.length;i++)t.addItem(this.items[i]);return t},t.createItems=function(){},t.createEl=function(){return n.prototype.createEl.call(this,"div",{className:this.buildWrapperCSSClass()},{})},t.buildWrapperCSSClass=function(){var e="vjs-menu-button";return!0===this.options_.inline?e+="-inline":e+="-popup","vjs-menu-button "+e+" "+sn.prototype.buildCSSClass()+" "+n.prototype.buildCSSClass.call(this)},t.buildCSSClass=function(){var e="vjs-menu-button";return!0===this.options_.inline?e+="-inline":e+="-popup","vjs-menu-button "+e+" "+n.prototype.buildCSSClass.call(this)},t.controlText=function(e,t){return void 0===t&&(t=this.menuButton_.el()),this.menuButton_.controlText(e,t)},t.dispose=function(){this.handleMouseLeave(),n.prototype.dispose.call(this)},t.handleClick=function(e){this.buttonPressed_?this.unpressButton():this.pressButton()},t.handleMouseLeave=function(e){this.removeClass("vjs-hover"),Fe(document,"keyup",this.handleMenuKeyUp_)},t.focus=function(){this.menuButton_.focus()},t.blur=function(){this.menuButton_.blur()},t.handleKeyDown=function(e){ht.isEventKey(e,"Esc")||ht.isEventKey(e,"Tab")?(this.buttonPressed_&&this.unpressButton(),ht.isEventKey(e,"Tab")||(e.preventDefault(),this.menuButton_.focus())):(ht.isEventKey(e,"Up")||ht.isEventKey(e,"Down"))&&(this.buttonPressed_||(e.preventDefault(),this.pressButton()))},t.handleMenuKeyUp=function(e){(ht.isEventKey(e,"Esc")||ht.isEventKey(e,"Tab"))&&this.removeClass("vjs-hover")},t.handleSubmenuKeyPress=function(e){this.handleSubmenuKeyDown(e)},t.handleSubmenuKeyDown=function(e){(ht.isEventKey(e,"Esc")||ht.isEventKey(e,"Tab"))&&(this.buttonPressed_&&this.unpressButton(),ht.isEventKey(e,"Tab")||(e.preventDefault(),this.menuButton_.focus()))},t.pressButton=function(){this.enabled_&&(this.buttonPressed_=!0,this.menu.show(),this.menu.lockShowing(),this.menuButton_.el_.setAttribute("aria-expanded","true"),q&&Y()||this.menu.focus())},t.unpressButton=function(){this.enabled_&&(this.buttonPressed_=!1,this.menu.unlockShowing(),this.menu.hide(),this.menuButton_.el_.setAttribute("aria-expanded","false"))},t.disable=function(){this.unpressButton(),this.enabled_=!1,this.addClass("vjs-disabled"),this.menuButton_.disable()},t.enable=function(){this.enabled_=!0,this.removeClass("vjs-disabled"),this.menuButton_.enable()},e}(pt);pt.registerComponent("MenuButton",Bt);Ft=function(r){function e(e,t){var i=t.tracks,t=r.call(this,e,t)||this;if(t.items.length<=1&&t.hide(),!i)return ft(t);var n=Ve(ft(t),t.update);return i.addEventListener("removetrack",n),i.addEventListener("addtrack",n),i.addEventListener("labelchange",n),t.player_.on("ready",n),t.player_.on("dispose",function(){i.removeEventListener("removetrack",n),i.removeEventListener("addtrack",n),i.removeEventListener("labelchange",n)}),t}return mt(e,r),e}(Bt);pt.registerComponent("TrackButton",Ft);var pn=["Tab","Esc","Up","Down","Right","Left"],jt=function(n){function e(e,t){e=n.call(this,e,t)||this;return e.selectable=t.selectable,e.isSelected_=t.selected||!1,e.multiSelectable=t.multiSelectable,e.selected(e.isSelected_),e.selectable?e.multiSelectable?e.el_.setAttribute("role","menuitemcheckbox"):e.el_.setAttribute("role","menuitemradio"):e.el_.setAttribute("role","menuitem"),e}mt(e,n);var t=e.prototype;return t.createEl=function(e,t,i){this.nonIconControl=!0;i=n.prototype.createEl.call(this,"li",b({className:"vjs-menu-item",tabIndex:-1},t),i);return i.replaceChild($("span",{className:"vjs-menu-item-text",textContent:this.localize(this.options_.label)}),i.querySelector(".vjs-icon-placeholder")),i},t.handleKeyDown=function(t){pn.some(function(e){return ht.isEventKey(t,e)})||n.prototype.handleKeyDown.call(this,t)},t.handleClick=function(e){this.selected(!0)},t.selected=function(e){this.selectable&&(e?(this.addClass("vjs-selected"),this.el_.setAttribute("aria-checked","true"),this.controlText(", selected"),this.isSelected_=!0):(this.removeClass("vjs-selected"),this.el_.setAttribute("aria-checked","false"),this.controlText(""),this.isSelected_=!1))},e}(C);pt.registerComponent("MenuItem",jt);var fn=function(u){function e(e,t){var n,i=t.track,r=e.textTracks();t.label=i.label||i.language||"Unknown",t.selected="showing"===i.mode,(n=u.call(this,e,t)||this).track=i,n.kinds=(t.kinds||[t.kind||n.track.kind]).filter(Boolean);function a(){for(var e=arguments.length,t=new Array(e),i=0;i<e;i++)t[i]=arguments[i];n.handleTracksChange.apply(ft(n),t)}function s(){for(var e=arguments.length,t=new Array(e),i=0;i<e;i++)t[i]=arguments[i];n.handleSelectedLanguageChange.apply(ft(n),t)}var o;return e.on(["loadstart","texttrackchange"],a),r.addEventListener("change",a),r.addEventListener("selectedlanguagechange",s),n.on("dispose",function(){e.off(["loadstart","texttrackchange"],a),r.removeEventListener("change",a),r.removeEventListener("selectedlanguagechange",s)}),void 0===r.onchange&&n.on(["tap","click"],function(){if("object"!=typeof window.Event)try{o=new window.Event("change")}catch(e){}o||(o=document.createEvent("Event")).initEvent("change",!0,!0),r.dispatchEvent(o)}),n.handleTracksChange(),n}mt(e,u);var t=e.prototype;return t.handleClick=function(e){var t=this.track,i=this.player_.textTracks();if(u.prototype.handleClick.call(this,e),i)for(var n=0;n<i.length;n++){var r=i[n];-1!==this.kinds.indexOf(r.kind)&&(r===t?"showing"!==r.mode&&(r.mode="showing"):"disabled"!==r.mode&&(r.mode="disabled"))}},t.handleTracksChange=function(e){var t="showing"===this.track.mode;t!==this.isSelected_&&this.selected(t)},t.handleSelectedLanguageChange=function(e){var t;"showing"===this.track.mode&&((t=this.player_.cache_.selectedLanguage)&&t.enabled&&t.language===this.track.language&&t.kind!==this.track.kind||(this.player_.cache_.selectedLanguage={enabled:!0,language:this.track.language,kind:this.track.kind}))},t.dispose=function(){this.track=null,u.prototype.dispose.call(this)},e}(jt);pt.registerComponent("TextTrackMenuItem",fn);var mn=function(i){function e(e,t){return t.track={player:e,kind:t.kind,kinds:t.kinds,default:!1,mode:"disabled"},t.kinds||(t.kinds=[t.kind]),t.label?t.track.label=t.label:t.track.label=t.kinds.join(" and ")+" off",t.selectable=!0,t.multiSelectable=!1,i.call(this,e,t)||this}mt(e,i);var t=e.prototype;return t.handleTracksChange=function(e){for(var t=this.player().textTracks(),i=!0,n=0,r=t.length;n<r;n++){var a=t[n];if(-1<this.options_.kinds.indexOf(a.kind)&&"showing"===a.mode){i=!1;break}}i!==this.isSelected_&&this.selected(i)},t.handleSelectedLanguageChange=function(e){for(var t=this.player().textTracks(),i=!0,n=0,r=t.length;n<r;n++){var a=t[n];if(-1<["captions","descriptions","subtitles"].indexOf(a.kind)&&"showing"===a.mode){i=!1;break}}i&&(this.player_.cache_.selectedLanguage={enabled:!1})},e}(fn);pt.registerComponent("OffTextTrackMenuItem",mn);j=function(i){function e(e,t){return(t=void 0===t?{}:t).tracks=e.textTracks(),i.call(this,e,t)||this}return mt(e,i),e.prototype.createItems=function(e,t){var i;void 0===t&&(t=fn),this.label_&&(i=this.label_+" off"),(e=void 0===e?[]:e).push(new mn(this.player_,{kinds:this.kinds_,kind:this.kind_,label:i})),this.hideThreshold_+=1;var n=this.player_.textTracks();Array.isArray(this.kinds_)||(this.kinds_=[this.kind_]);for(var r=0;r<n.length;r++){var a,s=n[r];-1<this.kinds_.indexOf(s.kind)&&((a=new t(this.player_,{track:s,kinds:this.kinds_,kind:this.kind_,selectable:!0,multiSelectable:!1})).addClass("vjs-"+s.kind+"-menu-item"),e.push(a))}return e},e}(Ft);pt.registerComponent("TextTrackButton",j);var gn=function(a){function e(e,t){var i=t.track,n=t.cue,r=e.currentTime();return t.selectable=!0,t.multiSelectable=!1,t.label=n.text,t.selected=n.startTime<=r&&r<n.endTime,(t=a.call(this,e,t)||this).track=i,t.cue=n,i.addEventListener("cuechange",Ve(ft(t),t.update)),t}mt(e,a);var t=e.prototype;return t.handleClick=function(e){a.prototype.handleClick.call(this),this.player_.currentTime(this.cue.startTime),this.update(this.cue.startTime)},t.update=function(e){var t=this.cue,i=this.player_.currentTime();this.selected(t.startTime<=i&&i<t.endTime)},e}(jt);pt.registerComponent("ChaptersTrackMenuItem",gn);k=function(n){function e(e,t,i){return n.call(this,e,t,i)||this}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-chapters-button "+n.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-chapters-button "+n.prototype.buildWrapperCSSClass.call(this)},t.update=function(e){this.track_&&(!e||"addtrack"!==e.type&&"removetrack"!==e.type)||this.setTrack(this.findChaptersTrack()),n.prototype.update.call(this)},t.setTrack=function(e){var t;this.track_!==e&&(this.updateHandler_||(this.updateHandler_=this.update.bind(this)),this.track_&&((t=this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_))&&t.removeEventListener("load",this.updateHandler_),this.track_=null),this.track_=e,this.track_&&(this.track_.mode="hidden",(e=this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_))&&e.addEventListener("load",this.updateHandler_)))},t.findChaptersTrack=function(){for(var e=this.player_.textTracks()||[],t=e.length-1;0<=t;t--){var i=e[t];if(i.kind===this.kind_)return i}},t.getMenuCaption=function(){return this.track_&&this.track_.label?this.track_.label:this.localize(ut(this.kind_))},t.createMenu=function(){return this.options_.title=this.getMenuCaption(),n.prototype.createMenu.call(this)},t.createItems=function(){var e=[];if(!this.track_)return e;var t=this.track_.cues;if(!t)return e;for(var i=0,n=t.length;i<n;i++){var r=t[i],r=new gn(this.player_,{track:this.track_,cue:r});e.push(r)}return e},e}(j);k.prototype.kind_="chapters",k.prototype.controlText_="Chapters",pt.registerComponent("ChaptersButton",k);li=function(a){function e(e,t,i){var i=a.call(this,e,t,i)||this,n=e.textTracks(),r=Ve(ft(i),i.handleTracksChange);return n.addEventListener("change",r),i.on("dispose",function(){n.removeEventListener("change",r)}),i}mt(e,a);var t=e.prototype;return t.handleTracksChange=function(e){for(var t=this.player().textTracks(),i=!1,n=0,r=t.length;n<r;n++){var a=t[n];if(a.kind!==this.kind_&&"showing"===a.mode){i=!0;break}}i?this.disable():this.enable()},t.buildCSSClass=function(){return"vjs-descriptions-button "+a.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-descriptions-button "+a.prototype.buildWrapperCSSClass.call(this)},e}(j);li.prototype.kind_="descriptions",li.prototype.controlText_="Descriptions",pt.registerComponent("DescriptionsButton",li);f=function(n){function e(e,t,i){return n.call(this,e,t,i)||this}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-subtitles-button "+n.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-subtitles-button "+n.prototype.buildWrapperCSSClass.call(this)},e}(j);f.prototype.kind_="subtitles",f.prototype.controlText_="Subtitles",pt.registerComponent("SubtitlesButton",f);var yn=function(i){function e(e,t){return t.track={player:e,kind:t.kind,label:t.kind+" settings",selectable:!1,default:!1,mode:"disabled"},t.selectable=!1,t.name="CaptionSettingsMenuItem",(e=i.call(this,e,t)||this).addClass("vjs-texttrack-settings"),e.controlText(", opens "+t.kind+" settings dialog"),e}return mt(e,i),e.prototype.handleClick=function(e){this.player().getChild("textTrackSettings").open()},e}(fn);pt.registerComponent("CaptionSettingsMenuItem",yn);ui=function(n){function e(e,t,i){return n.call(this,e,t,i)||this}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-captions-button "+n.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-captions-button "+n.prototype.buildWrapperCSSClass.call(this)},t.createItems=function(){var e=[];return this.player().tech_&&this.player().tech_.featuresNativeTextTracks||!this.player().getChild("textTrackSettings")||(e.push(new yn(this.player_,{kind:this.kind_})),this.hideThreshold_+=1),n.prototype.createItems.call(this,e)},e}(j);ui.prototype.kind_="captions",ui.prototype.controlText_="Captions",pt.registerComponent("CaptionsButton",ui);var vn=function(n){function e(){return n.apply(this,arguments)||this}return mt(e,n),e.prototype.createEl=function(e,t,i){t=n.prototype.createEl.call(this,e,t,i),i=t.querySelector(".vjs-menu-item-text");return"captions"===this.options_.track.kind&&(i.appendChild($("span",{className:"vjs-icon-placeholder"},{"aria-hidden":!0})),i.appendChild($("span",{className:"vjs-control-text",textContent:" "+this.localize("Captions")}))),t},e}(fn);pt.registerComponent("SubsCapsMenuItem",vn);Xt=function(i){function e(e,t){return(t=i.call(this,e,t=void 0===t?{}:t)||this).label_="subtitles",-1<["en","en-us","en-ca","fr-ca"].indexOf(t.player_.language_)&&(t.label_="captions"),t.menuButton_.controlText(ut(t.label_)),t}mt(e,i);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-subs-caps-button "+i.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-subs-caps-button "+i.prototype.buildWrapperCSSClass.call(this)},t.createItems=function(){var e=[];return this.player().tech_&&this.player().tech_.featuresNativeTextTracks||!this.player().getChild("textTrackSettings")||(e.push(new yn(this.player_,{kind:this.label_})),this.hideThreshold_+=1),e=i.prototype.createItems.call(this,e,vn)},e}(j);Xt.prototype.kinds_=["captions","subtitles"],Xt.prototype.controlText_="Subtitles",pt.registerComponent("SubsCapsButton",Xt);var _n=function(s){function e(e,t){var n,i=t.track,r=e.audioTracks();t.label=i.label||i.language||"Unknown",t.selected=i.enabled,(n=s.call(this,e,t)||this).track=i,n.addClass("vjs-"+i.kind+"-menu-item");function a(){for(var e=arguments.length,t=new Array(e),i=0;i<e;i++)t[i]=arguments[i];n.handleTracksChange.apply(ft(n),t)}return r.addEventListener("change",a),n.on("dispose",function(){r.removeEventListener("change",a)}),n}mt(e,s);var t=e.prototype;return t.createEl=function(e,t,i){t=s.prototype.createEl.call(this,e,t,i),i=t.querySelector(".vjs-menu-item-text");return"main-desc"===this.options_.track.kind&&(i.appendChild($("span",{className:"vjs-icon-placeholder"},{"aria-hidden":!0})),i.appendChild($("span",{className:"vjs-control-text",textContent:" "+this.localize("Descriptions")}))),t},t.handleClick=function(e){if(s.prototype.handleClick.call(this,e),this.track.enabled=!0,this.player_.tech_.featuresNativeAudioTracks)for(var t=this.player_.audioTracks(),i=0;i<t.length;i++){var n=t[i];n!==this.track&&(n.enabled=n===this.track)}},t.handleTracksChange=function(e){this.selected(this.track.enabled)},e}(jt);pt.registerComponent("AudioTrackMenuItem",_n);I=function(i){function e(e,t){return(t=void 0===t?{}:t).tracks=e.audioTracks(),i.call(this,e,t)||this}mt(e,i);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-audio-button "+i.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-audio-button "+i.prototype.buildWrapperCSSClass.call(this)},t.createItems=function(e){void 0===e&&(e=[]),this.hideThreshold_=1;for(var t=this.player_.audioTracks(),i=0;i<t.length;i++){var n=t[i];e.push(new _n(this.player_,{track:n,selectable:!0,multiSelectable:!1}))}return e},e}(Ft);I.prototype.controlText_="Audio Track",pt.registerComponent("AudioTrackButton",I);var bn=function(a){function e(e,t){var i,n=t.rate,r=parseFloat(n,10);return t.label=n,t.selected=r===e.playbackRate(),t.selectable=!0,t.multiSelectable=!1,(i=a.call(this,e,t)||this).label=n,i.rate=r,i.on(e,"ratechange",function(e){return i.update(e)}),i}mt(e,a);var t=e.prototype;return t.handleClick=function(e){a.prototype.handleClick.call(this),this.player().playbackRate(this.rate)},t.update=function(e){this.selected(this.player().playbackRate()===this.rate)},e}(jt);bn.prototype.contentElType="button",pt.registerComponent("PlaybackRateMenuItem",bn);C=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.menuButton_.el_.setAttribute("aria-describedby",i.labelElId_),i.updateVisibility(),i.updateLabel(),i.on(e,"loadstart",function(e){return i.updateVisibility(e)}),i.on(e,"ratechange",function(e){return i.updateLabel(e)}),i.on(e,"playbackrateschange",function(e){return i.handlePlaybackRateschange(e)}),i}mt(e,n);var t=e.prototype;return t.createEl=function(){var e=n.prototype.createEl.call(this);return this.labelElId_="vjs-playback-rate-value-label-"+this.id_,this.labelEl_=$("div",{className:"vjs-playback-rate-value",id:this.labelElId_,textContent:"1x"}),e.appendChild(this.labelEl_),e},t.dispose=function(){this.labelEl_=null,n.prototype.dispose.call(this)},t.buildCSSClass=function(){return"vjs-playback-rate "+n.prototype.buildCSSClass.call(this)},t.buildWrapperCSSClass=function(){return"vjs-playback-rate "+n.prototype.buildWrapperCSSClass.call(this)},t.createItems=function(){for(var e=this.playbackRates(),t=[],i=e.length-1;0<=i;i--)t.push(new bn(this.player(),{rate:e[i]+"x"}));return t},t.updateARIAAttributes=function(){this.el().setAttribute("aria-valuenow",this.player().playbackRate())},t.handleClick=function(e){var t=this.player().playbackRate(),i=this.playbackRates(),t=(i.indexOf(t)+1)%i.length;this.player().playbackRate(i[t])},t.handlePlaybackRateschange=function(e){this.update()},t.playbackRates=function(){var e=this.player();return e.playbackRates&&e.playbackRates()||[]},t.playbackRateSupported=function(){return this.player().tech_&&this.player().tech_.featuresPlaybackRate&&this.playbackRates()&&0<this.playbackRates().length},t.updateVisibility=function(e){this.playbackRateSupported()?this.removeClass("vjs-hidden"):this.addClass("vjs-hidden")},t.updateLabel=function(e){this.playbackRateSupported()&&(this.labelEl_.textContent=this.player().playbackRate()+"x")},e}(Bt);C.prototype.controlText_="Playback Rate",pt.registerComponent("PlaybackRateMenuButton",C);k=function(n){function e(){return n.apply(this,arguments)||this}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-spacer "+n.prototype.buildCSSClass.call(this)},t.createEl=function(e,t,i){return void 0===e&&(e="div"),void 0===i&&(i={}),(t=void 0===t?{}:t).className||(t.className=this.buildCSSClass()),n.prototype.createEl.call(this,e,t,i)},e}(pt);pt.registerComponent("Spacer",k),pt.registerComponent("CustomControlSpacer",function(e){function t(){return e.apply(this,arguments)||this}mt(t,e);var i=t.prototype;return i.buildCSSClass=function(){return"vjs-custom-control-spacer "+e.prototype.buildCSSClass.call(this)},i.createEl=function(){return e.prototype.createEl.call(this,"div",{className:this.buildCSSClass(),textContent:" "})},t}(k));li=function(e){function t(){return e.apply(this,arguments)||this}return mt(t,e),t.prototype.createEl=function(){return e.prototype.createEl.call(this,"div",{className:"vjs-control-bar",dir:"ltr"})},t}(pt);li.prototype.options_={children:["playToggle","volumePanel","currentTimeDisplay","timeDivider","durationDisplay","progressControl","liveDisplay","seekToLive","remainingTimeDisplay","customControlSpacer","playbackRateMenuButton","chaptersButton","descriptionsButton","subsCapsButton","audioTrackButton","fullscreenToggle"]},"exitPictureInPicture"in document&&li.prototype.options_.children.splice(li.prototype.options_.children.length-1,0,"pictureInPictureToggle"),pt.registerComponent("ControlBar",li);f=function(n){function e(e,t){var i=n.call(this,e,t)||this;return i.on(e,"error",function(e){return i.open(e)}),i}mt(e,n);var t=e.prototype;return t.buildCSSClass=function(){return"vjs-error-display "+n.prototype.buildCSSClass.call(this)},t.content=function(){var e=this.player().error();return e?this.localize(e.message):""},e}(At);f.prototype.options_=g({},At.prototype.options_,{pauseOnOpen:!1,fillAlways:!0,temporary:!1,uncloseable:!0}),pt.registerComponent("ErrorDisplay",f);var Tn="vjs-text-track-settings",ui=["#000","Black"],j=["#00F","Blue"],Xt=["#0FF","Cyan"],Ft=["#0F0","Green"],I=["#F0F","Magenta"],jt=["#F00","Red"],Bt=["#FFF","White"],C=["#FF0","Yellow"],k=["1","Opaque"],li=["0.5","Semi-Transparent"],f=["0","Transparent"],Sn={backgroundColor:{selector:".vjs-bg-color > select",id:"captions-background-color-%s",label:"Color",options:[ui,Bt,jt,Ft,j,C,I,Xt]},backgroundOpacity:{selector:".vjs-bg-opacity > select",id:"captions-background-opacity-%s",label:"Transparency",options:[k,li,f]},color:{selector:".vjs-fg-color > select",id:"captions-foreground-color-%s",label:"Color",options:[Bt,ui,jt,Ft,j,C,I,Xt]},edgeStyle:{selector:".vjs-edge-style > select",id:"%s",label:"Text Edge Style",options:[["none","None"],["raised","Raised"],["depressed","Depressed"],["uniform","Uniform"],["dropshadow","Dropshadow"]]},fontFamily:{selector:".vjs-font-family > select",id:"captions-font-family-%s",label:"Font Family",options:[["proportionalSansSerif","Proportional Sans-Serif"],["monospaceSansSerif","Monospace Sans-Serif"],["proportionalSerif","Proportional Serif"],["monospaceSerif","Monospace Serif"],["casual","Casual"],["script","Script"],["small-caps","Small Caps"]]},fontPercent:{selector:".vjs-font-percent > select",id:"captions-font-size-%s",label:"Font Size",options:[["0.50","50%"],["0.75","75%"],["1.00","100%"],["1.25","125%"],["1.50","150%"],["1.75","175%"],["2.00","200%"],["3.00","300%"],["4.00","400%"]],default:2,parser:function(e){return"1.00"===e?null:Number(e)}},textOpacity:{selector:".vjs-text-opacity > select",id:"captions-foreground-opacity-%s",label:"Transparency",options:[k,li]},windowColor:{selector:".vjs-window-color > select",id:"captions-window-color-%s",label:"Color"},windowOpacity:{selector:".vjs-window-opacity > select",id:"captions-window-opacity-%s",label:"Transparency",options:[f,li,k]}};function wn(e,t){if((e=t?t(e):e)&&"none"!==e)return e}Sn.windowColor.options=Sn.backgroundColor.options,pt.registerComponent("TextTrackSettings",function(n){function e(e,t){var i;return t.temporary=!1,(i=n.call(this,e,t)||this).updateDisplay=i.updateDisplay.bind(ft(i)),i.fill(),i.hasBeenOpened_=i.hasBeenFilled_=!0,i.endDialog=$("p",{className:"vjs-control-text",textContent:i.localize("End of dialog window.")}),i.el().appendChild(i.endDialog),i.setDefaults(),void 0===t.persistTextTrackSettings&&(i.options_.persistTextTrackSettings=i.options_.playerOptions.persistTextTrackSettings),i.on(i.$(".vjs-done-button"),"click",function(){i.saveSettings(),i.close()}),i.on(i.$(".vjs-default-button"),"click",function(){i.setDefaults(),i.updateDisplay()}),_(Sn,function(e){i.on(i.$(e.selector),"change",i.updateDisplay)}),i.options_.persistTextTrackSettings&&i.restoreSettings(),i}mt(e,n);var t=e.prototype;return t.dispose=function(){this.endDialog=null,n.prototype.dispose.call(this)},t.createElSelect_=function(e,t,i){var n=this;void 0===t&&(t=""),void 0===i&&(i="label");var e=Sn[e],r=e.id.replace("%s",this.id_),a=[t,r].join(" ").trim();return["<"+i+' id="'+r+'" class="'+("label"===i?"vjs-label":"")+'">',this.localize(e.label),"</"+i+">",'<select aria-labelledby="'+a+'">'].concat(e.options.map(function(e){var t=r+"-"+e[1].replace(/\W+/g,"");return['<option id="'+t+'" value="'+e[0]+'" ','aria-labelledby="'+a+" "+t+'">',n.localize(e[1]),"</option>"].join("")})).concat("</select>").join("")},t.createElFgColor_=function(){var e="captions-text-legend-"+this.id_;return['<fieldset class="vjs-fg-color vjs-track-setting">','<legend id="'+e+'">',this.localize("Text"),"</legend>",this.createElSelect_("color",e),'<span class="vjs-text-opacity vjs-opacity">',this.createElSelect_("textOpacity",e),"</span>","</fieldset>"].join("")},t.createElBgColor_=function(){var e="captions-background-"+this.id_;return['<fieldset class="vjs-bg-color vjs-track-setting">','<legend id="'+e+'">',this.localize("Background"),"</legend>",this.createElSelect_("backgroundColor",e),'<span class="vjs-bg-opacity vjs-opacity">',this.createElSelect_("backgroundOpacity",e),"</span>","</fieldset>"].join("")},t.createElWinColor_=function(){var e="captions-window-"+this.id_;return['<fieldset class="vjs-window-color vjs-track-setting">','<legend id="'+e+'">',this.localize("Window"),"</legend>",this.createElSelect_("windowColor",e),'<span class="vjs-window-opacity vjs-opacity">',this.createElSelect_("windowOpacity",e),"</span>","</fieldset>"].join("")},t.createElColors_=function(){return $("div",{className:"vjs-track-settings-colors",innerHTML:[this.createElFgColor_(),this.createElBgColor_(),this.createElWinColor_()].join("")})},t.createElFont_=function(){return $("div",{className:"vjs-track-settings-font",innerHTML:['<fieldset class="vjs-font-percent vjs-track-setting">',this.createElSelect_("fontPercent","","legend"),"</fieldset>",'<fieldset class="vjs-edge-style vjs-track-setting">',this.createElSelect_("edgeStyle","","legend"),"</fieldset>",'<fieldset class="vjs-font-family vjs-track-setting">',this.createElSelect_("fontFamily","","legend"),"</fieldset>"].join("")})},t.createElControls_=function(){var e=this.localize("restore all settings to the default values");return $("div",{className:"vjs-track-settings-controls",innerHTML:['<button type="button" class="vjs-default-button" title="'+e+'">',this.localize("Reset"),'<span class="vjs-control-text"> '+e+"</span>","</button>",'<button type="button" class="vjs-done-button">'+this.localize("Done")+"</button>"].join("")})},t.content=function(){return[this.createElColors_(),this.createElFont_(),this.createElControls_()]},t.label=function(){return this.localize("Caption Settings Dialog")},t.description=function(){return this.localize("Beginning of dialog window. Escape will cancel and close the window.")},t.buildCSSClass=function(){return n.prototype.buildCSSClass.call(this)+" vjs-text-track-settings"},t.getValues=function(){var i,n,e,r=this;return n=function(e,t,i){var n,t=(n=r.$(t.selector),t=t.parser,wn(n.options[n.options.selectedIndex].value,t));return void 0!==t&&(e[i]=t),e},void 0===(e={})&&(e=0),v(i=Sn).reduce(function(e,t){return n(e,i[t],t)},e)},t.setValues=function(i){var n=this;_(Sn,function(e,t){!function(e,t,i){if(t)for(var n=0;n<e.options.length;n++)if(wn(e.options[n].value,i)===t){e.selectedIndex=n;break}}(n.$(e.selector),i[t],e.parser)})},t.setDefaults=function(){var i=this;_(Sn,function(e){var t=e.hasOwnProperty("default")?e.default:0;i.$(e.selector).selectedIndex=t})},t.restoreSettings=function(){var e;try{e=JSON.parse(window.localStorage.getItem(Tn))}catch(e){h.warn(e)}e&&this.setValues(e)},t.saveSettings=function(){if(this.options_.persistTextTrackSettings){var e=this.getValues();try{Object.keys(e).length?window.localStorage.setItem(Tn,JSON.stringify(e)):window.localStorage.removeItem(Tn)}catch(e){h.warn(e)}}},t.updateDisplay=function(){var e=this.player_.getChild("textTrackDisplay");e&&e.updateDisplay()},t.conditionalBlur_=function(){this.previouslyActiveEl_=null;var e=this.player_.controlBar,t=e&&e.subsCapsButton,e=e&&e.captionsButton;t?t.focus():e&&e.focus()},e}(At)),pt.registerComponent("ResizeManager",function(a){function e(e,t){var i,n=t.ResizeObserver||window.ResizeObserver,r=lt({createEl:!(n=null===t.ResizeObserver?!1:n),reportTouchActivity:!1},t);return(i=a.call(this,e,r)||this).ResizeObserver=t.ResizeObserver||window.ResizeObserver,i.loadListener_=null,i.resizeObserver_=null,i.debouncedHandler_=Ge(function(){i.resizeHandler()},100,!1,ft(i)),n?(i.resizeObserver_=new i.ResizeObserver(i.debouncedHandler_),i.resizeObserver_.observe(e.el())):(i.loadListener_=function(){var e,t;i.el_&&i.el_.contentWindow&&(e=i.debouncedHandler_,t=i.unloadListener_=function(){Fe(this,"resize",e),Fe(this,"unload",t),t=null},Be(i.el_.contentWindow,"unload",t),Be(i.el_.contentWindow,"resize",e))},i.one("load",i.loadListener_)),i}mt(e,a);var t=e.prototype;return t.createEl=function(){return a.prototype.createEl.call(this,"iframe",{className:"vjs-resize-manager",tabIndex:-1},{"aria-hidden":"true"})},t.resizeHandler=function(){this.player_&&this.player_.trigger&&this.player_.trigger("playerresize")},t.dispose=function(){this.debouncedHandler_&&this.debouncedHandler_.cancel(),this.resizeObserver_&&(this.player_.el()&&this.resizeObserver_.unobserve(this.player_.el()),this.resizeObserver_.disconnect()),this.loadListener_&&this.off("load",this.loadListener_),this.el_&&this.el_.contentWindow&&this.unloadListener_&&this.unloadListener_.call(this.el_.contentWindow),this.ResizeObserver=null,this.resizeObserver=null,this.debouncedHandler_=null,this.loadListener_=null,a.prototype.dispose.call(this)},e}(pt));var En={trackingThreshold:20,liveTolerance:15};pt.registerComponent("LiveTracker",function(n){function e(e,t){var t=lt(En,t,{createEl:!1}),i=n.call(this,e,t)||this;return i.handleVisibilityChange_=function(e){return i.handleVisibilityChange(e)},i.trackLiveHandler_=function(){return i.trackLive_()},i.handlePlay_=function(e){return i.handlePlay(e)},i.handleFirstTimeupdate_=function(e){return i.handleFirstTimeupdate(e)},i.handleSeeked_=function(e){return i.handleSeeked(e)},i.seekToLiveEdge_=function(e){return i.seekToLiveEdge(e)},i.reset_(),i.on(i.player_,"durationchange",function(e){return i.handleDurationchange(e)}),i.on(i.player_,"canplay",function(){return i.toggleTracking()}),N&&"hidden"in document&&"visibilityState"in document&&i.on(document,"visibilitychange",i.handleVisibilityChange_),i}mt(e,n);var t=e.prototype;return t.handleVisibilityChange=function(){this.player_.duration()===1/0&&(document.hidden?this.stopTracking():this.startTracking())},t.trackLive_=function(){var e,t=this.player_.seekable();t&&t.length&&(e=Number(window.performance.now().toFixed(4)),t=-1===this.lastTime_?0:(e-this.lastTime_)/1e3,this.lastTime_=e,this.pastSeekEnd_=this.pastSeekEnd()+t,e=this.liveCurrentTime(),t=this.player_.currentTime(),t=this.player_.paused()||this.seekedBehindLive_||Math.abs(e-t)>this.options_.liveTolerance,(t=!this.timeupdateSeen_||e===1/0?!1:t)!==this.behindLiveEdge_&&(this.behindLiveEdge_=t,this.trigger("liveedgechange")))},t.handleDurationchange=function(){this.toggleTracking()},t.toggleTracking=function(){this.player_.duration()===1/0&&this.liveWindow()>=this.options_.trackingThreshold?(this.player_.options_.liveui&&this.player_.addClass("vjs-liveui"),this.startTracking()):(this.player_.removeClass("vjs-liveui"),this.stopTracking())},t.startTracking=function(){this.isTracking()||(this.timeupdateSeen_||(this.timeupdateSeen_=this.player_.hasStarted()),this.trackingInterval_=this.setInterval(this.trackLiveHandler_,30),this.trackLive_(),this.on(this.player_,["play","pause"],this.trackLiveHandler_),this.timeupdateSeen_?this.on(this.player_,"seeked",this.handleSeeked_):(this.one(this.player_,"play",this.handlePlay_),this.one(this.player_,"timeupdate",this.handleFirstTimeupdate_)))},t.handleFirstTimeupdate=function(){this.timeupdateSeen_=!0,this.on(this.player_,"seeked",this.handleSeeked_)},t.handleSeeked=function(){var 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e,t,n=this,r=ai[i],a=this.el()[r.getterName],s=this[r.getterName]();this["featuresNative"+r.capitalName+"Tracks"]&&a&&a.addEventListener&&(t=function(){for(var e=[],t=0;t<s.length;t++){for(var i=!1,n=0;n<a.length;n++)if(a[n]===s[t]){i=!0;break}i||e.push(s[t])}for(;e.length;)s.removeTrack(e.shift())},this[r.getterName+"Listeners_"]=e={change:function(e){var t={type:"change",target:s,currentTarget:s,srcElement:s};s.trigger(t),"text"===i&&n[si.remoteText.getterName]().trigger(t)},addtrack:function(e){s.addTrack(e.track)},removetrack:function(e){s.removeTrack(e.track)}},Object.keys(e).forEach(function(t){var i=e[t];a.addEventListener(t,i),n.on("dispose",function(e){return a.removeEventListener(t,i)})}),this.on("loadstart",t),this.on("dispose",function(e){return n.off("loadstart",t)}))},e.proxyNativeTracks_=function(){var t=this;ai.names.forEach(function(e){t.proxyNativeTracksForType_(e)})},e.createEl=function(){var e,t=this.options_.tag;t&&(this.options_.playerElIngest||this.movingMediaElementInDOM)||(t?(e=t.cloneNode(!0),t.parentNode&&t.parentNode.insertBefore(e,t),s.disposeMediaElement(t),t=e):(t=document.createElement("video"),e=lt({},this.options_.tag&&ae(this.options_.tag)),F&&!0===this.options_.nativeControlsForTouch||delete e.controls,re(t,b(e,{id:this.options_.techId,class:"vjs-tech"}))),t.playerId=this.options_.playerId),"undefined"!=typeof this.options_.preload&&oe(t,"preload",this.options_.preload),void 0!==this.options_.disablePictureInPicture&&(t.disablePictureInPicture=this.options_.disablePictureInPicture);for(var i=["loop","muted","playsinline","autoplay"],n=0;n<i.length;n++){var r=i[n],a=this.options_[r];"undefined"!=typeof a&&(a?oe(t,r,r):ue(t,r),t[r]=a)}return t},e.handleLateInit_=function(e){if(0!==e.networkState&&3!==e.networkState){if(0===e.readyState){var t=!1,i=function(){t=!0};this.on("loadstart",i);var n=function(){t||this.trigger("loadstart")};return this.on("loadedmetadata",n),void this.ready(function(){this.off("loadstart",i),this.off("loadedmetadata",n),t||this.trigger("loadstart")})}var r=["loadstart"];r.push("loadedmetadata"),2<=e.readyState&&r.push("loadeddata"),3<=e.readyState&&r.push("canplay"),4<=e.readyState&&r.push("canplaythrough"),this.ready(function(){r.forEach(function(e){this.trigger(e)},this)})}},e.setScrubbing=function(e){this.isScrubbing_=e},e.scrubbing=function(){return this.isScrubbing_},e.setCurrentTime=function(e){try{this.isScrubbing_&&this.el_.fastSeek&&V?this.el_.fastSeek(e):this.el_.currentTime=e}catch(e){h(e,"Video is not ready. 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this.el_&&"picture-in-picture"!==this.el_.webkitPresentationMode&&(this.one("webkitendfullscreen",e),this.trigger("fullscreenchange",{isFullscreen:!0,nativeIOSFullscreen:!0}))},this.on("webkitbeginfullscreen",t),this.on("dispose",function(){i.off("webkitbeginfullscreen",t),i.off("webkitendfullscreen",e)}))},e.supportsFullScreen=function(){if("function"==typeof this.el_.webkitEnterFullScreen){var e=window.navigator&&window.navigator.userAgent||"";if(/Android/.test(e)||!/Chrome|Mac OS X 10.5/.test(e))return!0}return!1},e.enterFullScreen=function(){var e=this.el_;if(e.paused&&e.networkState<=e.HAVE_METADATA)Et(this.el_.play()),this.setTimeout(function(){e.pause();try{e.webkitEnterFullScreen()}catch(e){this.trigger("fullscreenerror",e)}},0);else try{e.webkitEnterFullScreen()}catch(e){this.trigger("fullscreenerror",e)}},e.exitFullScreen=function(){this.el_.webkitDisplayingFullscreen?this.el_.webkitExitFullScreen():this.trigger("fullscreenerror",new Error("The video is not 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this.featuresNativeTextTracks&&this.el().appendChild(t),t},e.removeRemoteTextTrack=function(e){if(l.prototype.removeRemoteTextTrack.call(this,e),this.featuresNativeTextTracks)for(var t=this.$$("track"),i=t.length;i--;)e!==t[i]&&e!==t[i].track||this.el().removeChild(t[i])},e.getVideoPlaybackQuality=function(){if("function"==typeof this.el().getVideoPlaybackQuality)return this.el().getVideoPlaybackQuality();var e={};return"undefined"!=typeof this.el().webkitDroppedFrameCount&&"undefined"!=typeof this.el().webkitDecodedFrameCount&&(e.droppedVideoFrames=this.el().webkitDroppedFrameCount,e.totalVideoFrames=this.el().webkitDecodedFrameCount),window.performance&&"function"==typeof window.performance.now?e.creationTime=window.performance.now():window.performance&&window.performance.timing&&"number"==typeof window.performance.timing.navigationStart&&(e.creationTime=window.Date.now()-window.performance.timing.navigationStart),e},s}(ji);An(On,"TEST_VID",function(){if(X()){var e=document.createElement("video"),t=document.createElement("track");return t.kind="captions",t.srclang="en",t.label="English",e.appendChild(t),e}}),On.isSupported=function(){try{On.TEST_VID.volume=.5}catch(e){return!1}return!(!On.TEST_VID||!On.TEST_VID.canPlayType)},On.canPlayType=function(e){return On.TEST_VID.canPlayType(e)},On.canPlaySource=function(e,t){return On.canPlayType(e.type)},On.canControlVolume=function(){try{var e=On.TEST_VID.volume;On.TEST_VID.volume=e/2+.1;var t=e!==On.TEST_VID.volume;return t&&q?(window.setTimeout(function(){On&&On.prototype&&(On.prototype.featuresVolumeControl=e!==On.TEST_VID.volume)}),!1):t}catch(e){return!1}},On.canMuteVolume=function(){try{var e=On.TEST_VID.muted;return On.TEST_VID.muted=!e,On.TEST_VID.muted?oe(On.TEST_VID,"muted","muted"):ue(On.TEST_VID,"muted"),e!==On.TEST_VID.muted}catch(e){return!1}},On.canControlPlaybackRate=function(){if(A&&R&&M<58)return!1;try{var e=On.TEST_VID.playbackRate;return On.TEST_VID.playbackRate=e/2+.1,e!==On.TEST_VID.playbackRate}catch(e){return!1}},On.canOverrideAttributes=function(){try{var e=function(){};Object.defineProperty(document.createElement("video"),"src",{get:e,set:e}),Object.defineProperty(document.createElement("audio"),"src",{get:e,set:e}),Object.defineProperty(document.createElement("video"),"innerHTML",{get:e,set:e}),Object.defineProperty(document.createElement("audio"),"innerHTML",{get:e,set:e})}catch(e){return!1}return!0},On.supportsNativeTextTracks=function(){return V||q&&R},On.supportsNativeVideoTracks=function(){return!(!On.TEST_VID||!On.TEST_VID.videoTracks)},On.supportsNativeAudioTracks=function(){return!(!On.TEST_VID||!On.TEST_VID.audioTracks)},On.Events=["loadstart","suspend","abort","error","emptied","stalled","loadedmetadata","loadeddata","canplay","canplaythrough","playing","waiting","seeking","seeked","ended","durationchange","timeupdate","progress","play","pause","ratechange","resize","volumechange"],[["featuresMuteControl","canMuteVolume"],["featuresPlaybackRate","canControlPlaybackRate"],["featuresSourceset","canOverrideAttributes"],["featuresNativeTextTracks","supportsNativeTextTracks"],["featuresNativeVideoTracks","supportsNativeVideoTracks"],["featuresNativeAudioTracks","supportsNativeAudioTracks"]].forEach(function(e){var t=e[0],i=e[1];An(On.prototype,t,function(){return On[i]()},!0)}),On.prototype.featuresVolumeControl=On.canControlVolume(),On.prototype.movingMediaElementInDOM=!q,On.prototype.featuresFullscreenResize=!0,On.prototype.featuresProgressEvents=!0,On.prototype.featuresTimeupdateEvents=!0,On.patchCanPlayType=function(){4<=P&&!D&&!R&&(Pn=On.TEST_VID&&On.TEST_VID.constructor.prototype.canPlayType,On.TEST_VID.constructor.prototype.canPlayType=function(e){return e&&/^application\/(?:x-|vnd\.apple\.)mpegurl/i.test(e)?"maybe":Pn.call(this,e)})},On.unpatchCanPlayType=function(){var e=On.TEST_VID.constructor.prototype.canPlayType;return Pn&&(On.TEST_VID.constructor.prototype.canPlayType=Pn),e},On.patchCanPlayType(),On.disposeMediaElement=function(e){if(e){for(e.parentNode&&e.parentNode.removeChild(e);e.hasChildNodes();)e.removeChild(e.firstChild);e.removeAttribute("src"),"function"==typeof e.load&&function(){try{e.load()}catch(e){}}()}},On.resetMediaElement=function(e){if(e){for(var t=e.querySelectorAll("source"),i=t.length;i--;)e.removeChild(t[i]);e.removeAttribute("src"),"function"==typeof e.load&&function(){try{e.load()}catch(e){}}()}},["muted","defaultMuted","autoplay","controls","loop","playsinline"].forEach(function(e){On.prototype[e]=function(){return this.el_[e]||this.el_.hasAttribute(e)}}),["muted","defaultMuted","autoplay","loop","playsinline"].forEach(function(t){On.prototype["set"+ut(t)]=function(e){(this.el_[t]=e)?this.el_.setAttribute(t,t):this.el_.removeAttribute(t)}}),["paused","currentTime","buffered","volume","poster","preload","error","seeking","seekable","ended","playbackRate","defaultPlaybackRate","disablePictureInPicture","played","networkState","readyState","videoWidth","videoHeight","crossOrigin"].forEach(function(e){On.prototype[e]=function(){return this.el_[e]}}),["volume","src","poster","preload","playbackRate","defaultPlaybackRate","disablePictureInPicture","crossOrigin"].forEach(function(t){On.prototype["set"+ut(t)]=function(e){this.el_[t]=e}}),["pause","load","play"].forEach(function(e){On.prototype[e]=function(){return this.el_[e]()}}),ji.withSourceHandlers(On),On.nativeSourceHandler={},On.nativeSourceHandler.canPlayType=function(e){try{return On.TEST_VID.canPlayType(e)}catch(e){return""}},On.nativeSourceHandler.canHandleSource=function(e,t){if(e.type)return On.nativeSourceHandler.canPlayType(e.type);if(e.src){e=Nt(e.src);return On.nativeSourceHandler.canPlayType("video/"+e)}return""},On.nativeSourceHandler.handleSource=function(e,t,i){t.setSrc(e.src)},On.nativeSourceHandler.dispose=function(){},On.registerSourceHandler(On.nativeSourceHandler),ji.registerTech("Html5",On);var Rn=["progress","abort","suspend","emptied","stalled","loadedmetadata","loadeddata","timeupdate","resize","volumechange","texttrackchange"],Mn={canplay:"CanPlay",canplaythrough:"CanPlayThrough",playing:"Playing",seeked:"Seeked"},Nn=["tiny","xsmall","small","medium","large","xlarge","huge"],Un={};Nn.forEach(function(e){var t="x"===e.charAt(0)?"x-"+e.substring(1):e;Un[e]="vjs-layout-"+t});var Bn={tiny:210,xsmall:320,small:425,medium:768,large:1440,xlarge:2560,huge:1/0},Fn=function(c){function o(e,t,i){var n,r;if(e.id=e.id||t.id||"vjs_video_"+Pe++,(t=b(o.getTagSettings(e),t)).initChildren=!1,t.createEl=!1,t.evented=!1,t.reportTouchActivity=!1,!t.language)if("function"==typeof e.closest){var a=e.closest("[lang]");a&&a.getAttribute&&(t.language=a.getAttribute("lang"))}else for(var s=e;s&&1===s.nodeType;){if(ae(s).hasOwnProperty("lang")){t.language=s.getAttribute("lang");break}s=s.parentNode}if((n=c.call(this,null,t,i)||this).boundDocumentFullscreenChange_=function(e){return n.documentFullscreenChange_(e)},n.boundFullWindowOnEscKey_=function(e){return n.fullWindowOnEscKey(e)},n.boundUpdateStyleEl_=function(e){return n.updateStyleEl_(e)},n.boundApplyInitTime_=function(e){return n.applyInitTime_(e)},n.boundUpdateCurrentBreakpoint_=function(e){return n.updateCurrentBreakpoint_(e)},n.boundHandleTechClick_=function(e){return n.handleTechClick_(e)},n.boundHandleTechDoubleClick_=function(e){return n.handleTechDoubleClick_(e)},n.boundHandleTechTouchStart_=function(e){return n.handleTechTouchStart_(e)},n.boundHandleTechTouchMove_=function(e){return n.handleTechTouchMove_(e)},n.boundHandleTechTouchEnd_=function(e){return n.handleTechTouchEnd_(e)},n.boundHandleTechTap_=function(e){return n.handleTechTap_(e)},n.isFullscreen_=!1,n.log=p(n.id_),n.fsApi_=l,n.isPosterFromTech_=!1,n.queuedCallbacks_=[],n.isReady_=!1,n.hasStarted_=!1,n.userActive_=!1,n.debugEnabled_=!1,!n.options_||!n.options_.techOrder||!n.options_.techOrder.length)throw new Error("No techOrder specified. Did you overwrite videojs.options instead of just changing the properties you want to override?");n.tag=e,n.tagAttributes=e&&ae(e),n.language(n.options_.language),t.languages?(r={},Object.getOwnPropertyNames(t.languages).forEach(function(e){r[e.toLowerCase()]=t.languages[e]}),n.languages_=r):n.languages_=o.prototype.options_.languages,n.resetCache_(),n.poster_=t.poster||"",n.controls_=!!t.controls,e.controls=!1,e.removeAttribute("controls"),n.changingSrc_=!1,n.playCallbacks_=[],n.playTerminatedQueue_=[],e.hasAttribute("autoplay")?n.autoplay(!0):n.autoplay(n.options_.autoplay),t.plugins&&Object.keys(t.plugins).forEach(function(e){if("function"!=typeof n[e])throw new Error('plugin "'+e+'" does not exist')}),n.scrubbing_=!1,n.el_=n.createEl(),rt(ft(n),{eventBusKey:"el_"}),n.fsApi_.requestFullscreen&&(Be(document,n.fsApi_.fullscreenchange,n.boundDocumentFullscreenChange_),n.on(n.fsApi_.fullscreenchange,n.boundDocumentFullscreenChange_)),n.fluid_&&n.on(["playerreset","resize"],n.boundUpdateStyleEl_);i=lt(n.options_);t.plugins&&Object.keys(t.plugins).forEach(function(e){n[e](t.plugins[e])}),t.debug&&n.debug(!0),n.options_.playerOptions=i,n.middleware_=[],n.playbackRates(t.playbackRates),n.initChildren(),n.isAudio("audio"===e.nodeName.toLowerCase()),n.controls()?n.addClass("vjs-controls-enabled"):n.addClass("vjs-controls-disabled"),n.el_.setAttribute("role","region"),n.isAudio()?n.el_.setAttribute("aria-label",n.localize("Audio Player")):n.el_.setAttribute("aria-label",n.localize("Video 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t=this;this.trigger("dispose"),this.off("dispose"),Fe(document,this.fsApi_.fullscreenchange,this.boundDocumentFullscreenChange_),Fe(document,"keydown",this.boundFullWindowOnEscKey_),this.styleEl_&&this.styleEl_.parentNode&&(this.styleEl_.parentNode.removeChild(this.styleEl_),this.styleEl_=null),o.players[this.id_]=null,this.tag&&this.tag.player&&(this.tag.player=null),this.el_&&this.el_.player&&(this.el_.player=null),this.tech_&&(this.tech_.dispose(),this.isPosterFromTech_=!1,this.poster_=""),this.playerElIngest_&&(this.playerElIngest_=null),this.tag&&(this.tag=null),qi[this.id()]=null,oi.names.forEach(function(e){e=oi[e],e=t[e.getterName]();e&&e.off&&e.off()}),c.prototype.dispose.call(this)},e.createEl=function(){var t,i=this.tag,e=this.playerElIngest_=i.parentNode&&i.parentNode.hasAttribute&&i.parentNode.hasAttribute("data-vjs-player"),n="video-js"===this.tag.tagName.toLowerCase();e?t=this.el_=i.parentNode:n||(t=this.el_=c.prototype.createEl.call(this,"div"));var r,a,s=ae(i);if(n){for(t=this.el_=i,i=this.tag=document.createElement("video");t.children.length;)i.appendChild(t.firstChild);ee(t,"video-js")||te(t,"video-js"),t.appendChild(i),e=this.playerElIngest_=t,Object.keys(t).forEach(function(e){try{i[e]=t[e]}catch(e){}})}i.setAttribute("tabindex","-1"),s.tabindex="-1",(N||R&&B)&&(i.setAttribute("role","application"),s.role="application"),i.removeAttribute("width"),i.removeAttribute("height"),"width"in s&&delete s.width,"height"in s&&delete s.height,Object.getOwnPropertyNames(s).forEach(function(e){n&&"class"===e||t.setAttribute(e,s[e]),n&&i.setAttribute(e,s[e])}),i.playerId=i.id,i.id+="_html5_api",i.className="vjs-tech",(i.player=t.player=this).addClass("vjs-paused"),!0!==window.VIDEOJS_NO_DYNAMIC_STYLE&&(this.styleEl_=xe("vjs-styles-dimensions"),r=Te(".vjs-styles-defaults"),(a=Te("head")).insertBefore(this.styleEl_,r?r.nextSibling:a.firstChild)),this.fill_=!1,this.fluid_=!1,this.width(this.options_.width),this.height(this.options_.height),this.fill(this.options_.fill),this.fluid(this.options_.fluid),this.aspectRatio(this.options_.aspectRatio),this.crossOrigin(this.options_.crossOrigin||this.options_.crossorigin);for(var o=i.getElementsByTagName("a"),u=0;u<o.length;u++){var l=o.item(u);te(l,"vjs-hidden"),l.setAttribute("hidden","hidden")}return i.initNetworkState_=i.networkState,i.parentNode&&!e&&i.parentNode.insertBefore(t,i),Z(i,t),this.children_.unshift(i),this.el_.setAttribute("lang",this.language_),this.el_.setAttribute("translate","no"),this.el_=t},e.crossOrigin=function(e){if(!e)return this.techGet_("crossOrigin");"anonymous"===e||"use-credentials"===e?this.techCall_("setCrossOrigin",e):h.warn('crossOrigin must be "anonymous" or "use-credentials", given "'+e+'"')},e.width=function(e){return this.dimension("width",e)},e.height=function(e){return this.dimension("height",e)},e.dimension=function(e,t){var i=e+"_";if(void 0===t)return this[i]||0;if(""===t||"auto"===t)return this[i]=void 0,void this.updateStyleEl_();var n=parseFloat(t);isNaN(n)?h.error('Improper value "'+t+'" supplied for for '+e):(this[i]=n,this.updateStyleEl_())},e.fluid=function(e){var t,i=this;if(void 0===e)return!!this.fluid_;this.fluid_=!!e,it(this)&&this.off(["playerreset","resize"],this.boundUpdateStyleEl_),e?(this.addClass("vjs-fluid"),this.fill(!1),t=function(){i.on(["playerreset","resize"],i.boundUpdateStyleEl_)},it(e=this)?t():(e.eventedCallbacks||(e.eventedCallbacks=[]),e.eventedCallbacks.push(t))):this.removeClass("vjs-fluid"),this.updateStyleEl_()},e.fill=function(e){if(void 0===e)return!!this.fill_;this.fill_=!!e,e?(this.addClass("vjs-fill"),this.fluid(!1)):this.removeClass("vjs-fill")},e.aspectRatio=function(e){if(void 0===e)return this.aspectRatio_;if(!/^\d+\:\d+$/.test(e))throw new Error("Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.");this.aspectRatio_=e,this.fluid(!0),this.updateStyleEl_()},e.updateStyleEl_=function(){var e,t,i,n;!0!==window.VIDEOJS_NO_DYNAMIC_STYLE?(n=(i=(void 0!==this.aspectRatio_&&"auto"!==this.aspectRatio_?this.aspectRatio_:0<this.videoWidth()?this.videoWidth()+":"+this.videoHeight():"16:9").split(":"))[1]/i[0],e=void 0!==this.width_?this.width_:void 0!==this.height_?this.height_/n:this.videoWidth()||300,t=void 0!==this.height_?this.height_:e*n,i=/^[^a-zA-Z]/.test(this.id())?"dimensions-"+this.id():this.id()+"-dimensions",this.addClass(i),Ae(this.styleEl_,"\n      ."+i+" {\n        width: "+e+"px;\n        height: "+t+"px;\n      }\n\n      ."+i+".vjs-fluid {\n        padding-top: "+100*n+"%;\n      }\n    ")):(t="number"==typeof this.width_?this.width_:this.options_.width,i="number"==typeof this.height_?this.height_:this.options_.height,(n=this.tech_&&this.tech_.el())&&(0<=t&&(n.width=t),0<=i&&(n.height=i)))},e.loadTech_=function(e,t){var i=this;this.tech_&&this.unloadTech_();var n=ut(e),r=e.charAt(0).toLowerCase()+e.slice(1);"Html5"!==n&&this.tag&&(ji.getTech("Html5").disposeMediaElement(this.tag),this.tag.player=null,this.tag=null),this.techName_=n,this.isReady_=!1;var a=this.autoplay(),s={source:t,autoplay:a="string"==typeof this.autoplay()||!0===this.autoplay()&&this.options_.normalizeAutoplay?!1:a,nativeControlsForTouch:this.options_.nativeControlsForTouch,playerId:this.id(),techId:this.id()+"_"+r+"_api",playsinline:this.options_.playsinline,preload:this.options_.preload,loop:this.options_.loop,disablePictureInPicture:this.options_.disablePictureInPicture,muted:this.options_.muted,poster:this.poster(),language:this.language(),playerElIngest:this.playerElIngest_||!1,"vtt.js":this.options_["vtt.js"],canOverridePoster:!!this.options_.techCanOverridePoster,enableSourceset:this.options_.enableSourceset,Promise:this.options_.Promise};oi.names.forEach(function(e){e=oi[e];s[e.getterName]=i[e.privateName]}),b(s,this.options_[n]),b(s,this.options_[r]),b(s,this.options_[e.toLowerCase()]),this.tag&&(s.tag=this.tag),t&&t.src===this.cache_.src&&0<this.cache_.currentTime&&(s.startTime=this.cache_.currentTime);e=ji.getTech(e);if(!e)throw new Error("No Tech named '"+n+"' exists! '"+n+"' should be registered using videojs.registerTech()'");this.tech_=new e(s),this.tech_.ready(Ve(this,this.handleTechReady_),!0),It(this.textTracksJson_||[],this.tech_),Rn.forEach(function(t){i.on(i.tech_,t,function(e){return i["handleTech"+ut(t)+"_"](e)})}),Object.keys(Mn).forEach(function(t){i.on(i.tech_,t,function(e){0===i.tech_.playbackRate()&&i.tech_.seeking()?i.queuedCallbacks_.push({callback:i["handleTech"+Mn[t]+"_"].bind(i),event:e}):i["handleTech"+Mn[t]+"_"](e)})}),this.on(this.tech_,"loadstart",function(e){return i.handleTechLoadStart_(e)}),this.on(this.tech_,"sourceset",function(e){return i.handleTechSourceset_(e)}),this.on(this.tech_,"waiting",function(e){return i.handleTechWaiting_(e)}),this.on(this.tech_,"ended",function(e){return i.handleTechEnded_(e)}),this.on(this.tech_,"seeking",function(e){return i.handleTechSeeking_(e)}),this.on(this.tech_,"play",function(e){return i.handleTechPlay_(e)}),this.on(this.tech_,"firstplay",function(e){return i.handleTechFirstPlay_(e)}),this.on(this.tech_,"pause",function(e){return i.handleTechPause_(e)}),this.on(this.tech_,"durationchange",function(e){return i.handleTechDurationChange_(e)}),this.on(this.tech_,"fullscreenchange",function(e,t){return i.handleTechFullscreenChange_(e,t)}),this.on(this.tech_,"fullscreenerror",function(e,t){return i.handleTechFullscreenError_(e,t)}),this.on(this.tech_,"enterpictureinpicture",function(e){return i.handleTechEnterPictureInPicture_(e)}),this.on(this.tech_,"leavepictureinpicture",function(e){return i.handleTechLeavePictureInPicture_(e)}),this.on(this.tech_,"error",function(e){return i.handleTechError_(e)}),this.on(this.tech_,"posterchange",function(e){return i.handleTechPosterChange_(e)}),this.on(this.tech_,"textdata",function(e){return i.handleTechTextData_(e)}),this.on(this.tech_,"ratechange",function(e){return i.handleTechRateChange_(e)}),this.on(this.tech_,"loadedmetadata",this.boundUpdateStyleEl_),this.usingNativeControls(this.techGet_("controls")),this.controls()&&!this.usingNativeControls()&&this.addTechControlsListeners_(),this.tech_.el().parentNode===this.el()||"Html5"===n&&this.tag||Z(this.tech_.el(),this.el()),this.tag&&(this.tag.player=null,this.tag=null)},e.unloadTech_=function(){var t=this;oi.names.forEach(function(e){e=oi[e];t[e.privateName]=t[e.getterName]()}),this.textTracksJson_=Ct(this.tech_),this.isReady_=!1,this.tech_.dispose(),this.tech_=!1,this.isPosterFromTech_&&(this.poster_="",this.trigger("posterchange")),this.isPosterFromTech_=!1},e.tech=function(e){return void 0===e&&h.warn("Using the tech directly can be dangerous. I hope you know what you're doing.\nSee https://github.com/videojs/video.js/issues/2617 for more info.\n"),this.tech_},e.addTechControlsListeners_=function(){this.removeTechControlsListeners_(),this.on(this.tech_,"click",this.boundHandleTechClick_),this.on(this.tech_,"dblclick",this.boundHandleTechDoubleClick_),this.on(this.tech_,"touchstart",this.boundHandleTechTouchStart_),this.on(this.tech_,"touchmove",this.boundHandleTechTouchMove_),this.on(this.tech_,"touchend",this.boundHandleTechTouchEnd_),this.on(this.tech_,"tap",this.boundHandleTechTap_)},e.removeTechControlsListeners_=function(){this.off(this.tech_,"tap",this.boundHandleTechTap_),this.off(this.tech_,"touchstart",this.boundHandleTechTouchStart_),this.off(this.tech_,"touchmove",this.boundHandleTechTouchMove_),this.off(this.tech_,"touchend",this.boundHandleTechTouchEnd_),this.off(this.tech_,"click",this.boundHandleTechClick_),this.off(this.tech_,"dblclick",this.boundHandleTechDoubleClick_)},e.handleTechReady_=function(){this.triggerReady(),this.cache_.volume&&this.techCall_("setVolume",this.cache_.volume),this.handleTechPosterChange_(),this.handleTechDurationChange_()},e.handleTechLoadStart_=function(){this.removeClass("vjs-ended"),this.removeClass("vjs-seeking"),this.error(null),this.handleTechDurationChange_(),this.paused()?(this.hasStarted(!1),this.trigger("loadstart")):(this.trigger("loadstart"),this.trigger("firstplay")),this.manualAutoplay_(!0===this.autoplay()&&this.options_.normalizeAutoplay?"play":this.autoplay())},e.manualAutoplay_=function(e){var n=this;if(this.tech_&&"string"==typeof e){var t,i=function(){var e=n.muted();n.muted(!0);function t(){n.muted(e)}n.playTerminatedQueue_.push(t);var i=n.play();if(wt(i))return i.catch(function(e){throw t(),new Error("Rejection at manualAutoplay. Restoring muted value. "+(e||""))})};if("any"!==e||this.muted()?t="muted"!==e||this.muted()?this.play():i():wt(t=this.play())&&(t=t.catch(i)),wt(t))return t.then(function(){n.trigger({type:"autoplay-success",autoplay:e})}).catch(function(){n.trigger({type:"autoplay-failure",autoplay:e})})}},e.updateSourceCaches_=function(e){var t=e=void 0===e?"":e,i="";"string"!=typeof t&&(t=e.src,i=e.type),this.cache_.source=this.cache_.source||{},this.cache_.sources=this.cache_.sources||[],t&&!i&&(i=function(e,t){if(!t)return"";if(e.cache_.source.src===t&&e.cache_.source.type)return e.cache_.source.type;var i=e.cache_.sources.filter(function(e){return e.src===t});if(i.length)return i[0].type;for(var n=e.$$("source"),r=0;r<n.length;r++){var a=n[r];if(a.type&&a.src&&a.src===t)return a.type}return $i(t)}(this,t)),this.cache_.source=lt({},e,{src:t,type:i});for(var i=this.cache_.sources.filter(function(e){return e.src&&e.src===t}),n=[],r=this.$$("source"),a=[],s=0;s<r.length;s++){var o=ae(r[s]);n.push(o),o.src&&o.src===t&&a.push(o.src)}a.length&&!i.length?this.cache_.sources=n:i.length||(this.cache_.sources=[this.cache_.source]),this.cache_.src=t},e.handleTechSourceset_=function(e){var t,i,n,r=this;this.changingSrc_||(t=function(e){return r.updateSourceCaches_(e)},i=this.currentSource().src,n=e.src,i&&!/^blob:/.test(i)&&/^blob:/.test(n)&&(this.lastSource_&&(this.lastSource_.tech===n||this.lastSource_.player===i)||(t=function(){})),t(n),e.src||this.tech_.any(["sourceset","loadstart"],function(e){"sourceset"!==e.type&&(e=r.techGet("currentSrc"),r.lastSource_.tech=e,r.updateSourceCaches_(e))})),this.lastSource_={player:this.currentSource().src,tech:e.src},this.trigger({src:e.src,type:"sourceset"})},e.hasStarted=function(e){if(void 0===e)return this.hasStarted_;e!==this.hasStarted_&&(this.hasStarted_=e,this.hasStarted_?(this.addClass("vjs-has-started"),this.trigger("firstplay")):this.removeClass("vjs-has-started"))},e.handleTechPlay_=function(){this.removeClass("vjs-ended"),this.removeClass("vjs-paused"),this.addClass("vjs-playing"),this.hasStarted(!0),this.trigger("play")},e.handleTechRateChange_=function(){0<this.tech_.playbackRate()&&0===this.cache_.lastPlaybackRate&&(this.queuedCallbacks_.forEach(function(e){return e.callback(e.event)}),this.queuedCallbacks_=[]),this.cache_.lastPlaybackRate=this.tech_.playbackRate(),this.trigger("ratechange")},e.handleTechWaiting_=function(){var t=this;this.addClass("vjs-waiting"),this.trigger("waiting");var i=this.currentTime();this.on("timeupdate",function e(){i!==t.currentTime()&&(t.removeClass("vjs-waiting"),t.off("timeupdate",e))})},e.handleTechCanPlay_=function(){this.removeClass("vjs-waiting"),this.trigger("canplay")},e.handleTechCanPlayThrough_=function(){this.removeClass("vjs-waiting"),this.trigger("canplaythrough")},e.handleTechPlaying_=function(){this.removeClass("vjs-waiting"),this.trigger("playing")},e.handleTechSeeking_=function(){this.addClass("vjs-seeking"),this.trigger("seeking")},e.handleTechSeeked_=function(){this.removeClass("vjs-seeking"),this.removeClass("vjs-ended"),this.trigger("seeked")},e.handleTechFirstPlay_=function(){this.options_.starttime&&(h.warn("Passing the `starttime` option to the player will be deprecated in 6.0"),this.currentTime(this.options_.starttime)),this.addClass("vjs-has-started"),this.trigger("firstplay")},e.handleTechPause_=function(){this.removeClass("vjs-playing"),this.addClass("vjs-paused"),this.trigger("pause")},e.handleTechEnded_=function(){this.addClass("vjs-ended"),this.removeClass("vjs-waiting"),this.options_.loop?(this.currentTime(0),this.play()):this.paused()||this.pause(),this.trigger("ended")},e.handleTechDurationChange_=function(){this.duration(this.techGet_("duration"))},e.handleTechClick_=function(e){this.controls_&&(void 0!==this.options_&&void 0!==this.options_.userActions&&void 0!==this.options_.userActions.click&&!1===this.options_.userActions.click||(void 0!==this.options_&&void 0!==this.options_.userActions&&"function"==typeof this.options_.userActions.click?this.options_.userActions.click.call(this,e):this.paused()?Et(this.play()):this.pause()))},e.handleTechDoubleClick_=function(t){this.controls_&&(Array.prototype.some.call(this.$$(".vjs-control-bar, .vjs-modal-dialog"),function(e){return e.contains(t.target)})||void 0!==this.options_&&void 0!==this.options_.userActions&&void 0!==this.options_.userActions.doubleClick&&!1===this.options_.userActions.doubleClick||(void 0!==this.options_&&void 0!==this.options_.userActions&&"function"==typeof this.options_.userActions.doubleClick?this.options_.userActions.doubleClick.call(this,t):this.isFullscreen()?this.exitFullscreen():this.requestFullscreen()))},e.handleTechTap_=function(){this.userActive(!this.userActive())},e.handleTechTouchStart_=function(){this.userWasActive=this.userActive()},e.handleTechTouchMove_=function(){this.userWasActive&&this.reportUserActivity()},e.handleTechTouchEnd_=function(e){e.cancelable&&e.preventDefault()},e.handleStageClick_=function(){this.reportUserActivity()},e.toggleFullscreenClass_=function(){this.isFullscreen()?this.addClass("vjs-fullscreen"):this.removeClass("vjs-fullscreen")},e.documentFullscreenChange_=function(e){var t=e.target.player;t&&t!==this||(e=this.el(),!(t=document[this.fsApi_.fullscreenElement]===e)&&e.matches?t=e.matches(":"+this.fsApi_.fullscreen):!t&&e.msMatchesSelector&&(t=e.msMatchesSelector(":"+this.fsApi_.fullscreen)),this.isFullscreen(t))},e.handleTechFullscreenChange_=function(e,t){var i=this;t&&(t.nativeIOSFullscreen&&(this.addClass("vjs-ios-native-fs"),this.tech_.one("webkitendfullscreen",function(){i.removeClass("vjs-ios-native-fs")})),this.isFullscreen(t.isFullscreen))},e.handleTechFullscreenError_=function(e,t){this.trigger("fullscreenerror",t)},e.togglePictureInPictureClass_=function(){this.isInPictureInPicture()?this.addClass("vjs-picture-in-picture"):this.removeClass("vjs-picture-in-picture")},e.handleTechEnterPictureInPicture_=function(e){this.isInPictureInPicture(!0)},e.handleTechLeavePictureInPicture_=function(e){this.isInPictureInPicture(!1)},e.handleTechError_=function(){var e=this.tech_.error();this.error(e)},e.handleTechTextData_=function(){this.trigger("textdata",1<arguments.length?arguments[1]:null)},e.getCache=function(){return this.cache_},e.resetCache_=function(){this.cache_={currentTime:0,initTime:0,inactivityTimeout:this.options_.inactivityTimeout,duration:NaN,lastVolume:1,lastPlaybackRate:this.defaultPlaybackRate(),media:null,src:"",source:{},sources:[],playbackRates:[],volume:1}},e.techCall_=function(n,r){this.ready(function(){if(n in Xi)return e=this.middleware_,t=this.tech_,i=r,t[t=n](e.reduce(Yi(t),i));if(n in Ki)return Gi(this.middleware_,this.tech_,n,r);var e,t,i;try{this.tech_&&this.tech_[n](r)}catch(e){throw h(e),e}},!0)},e.techGet_=function(t){if(this.tech_&&this.tech_.isReady_){if(t in zi)return e=this.middleware_,i=this.tech_,n=t,e.reduceRight(Yi(n),i[n]());if(t in Ki)return Gi(this.middleware_,this.tech_,t);var e,i,n;try{return this.tech_[t]()}catch(e){if(void 0===this.tech_[t])throw h("Video.js: "+t+" method not defined for "+this.techName_+" playback technology.",e),e;if("TypeError"===e.name)throw h("Video.js: "+t+" unavailable on "+this.techName_+" playback technology element.",e),this.tech_.isReady_=!1,e;throw h(e),e}}},e.play=function(){var t=this,e=this.options_.Promise||window.Promise;return e?new e(function(e){t.play_(e)}):this.play_()},e.play_=function(e){var t=this;this.playCallbacks_.push(e=void 0===e?Et:e);e=Boolean(!this.changingSrc_&&(this.src()||this.currentSrc()));if(this.waitToPlay_&&(this.off(["ready","loadstart"],this.waitToPlay_),this.waitToPlay_=null),!this.isReady_||!e)return this.waitToPlay_=function(e){t.play_()},this.one(["ready","loadstart"],this.waitToPlay_),void(e||!V&&!q||this.load());e=this.techGet_("play");null===e?this.runPlayTerminatedQueue_():this.runPlayCallbacks_(e)},e.runPlayTerminatedQueue_=function(){var e=this.playTerminatedQueue_.slice(0);this.playTerminatedQueue_=[],e.forEach(function(e){e()})},e.runPlayCallbacks_=function(t){var e=this.playCallbacks_.slice(0);this.playCallbacks_=[],this.playTerminatedQueue_=[],e.forEach(function(e){e(t)})},e.pause=function(){this.techCall_("pause")},e.paused=function(){return!1!==this.techGet_("paused")},e.played=function(){return this.techGet_("played")||vt(0,0)},e.scrubbing=function(e){if("undefined"==typeof e)return this.scrubbing_;this.scrubbing_=!!e,this.techCall_("setScrubbing",this.scrubbing_),e?this.addClass("vjs-scrubbing"):this.removeClass("vjs-scrubbing")},e.currentTime=function(e){return"undefined"!=typeof e?(e<0&&(e=0),this.isReady_&&!this.changingSrc_&&this.tech_&&this.tech_.isReady_?(this.techCall_("setCurrentTime",e),void(this.cache_.initTime=0)):(this.cache_.initTime=e,this.off("canplay",this.boundApplyInitTime_),void this.one("canplay",this.boundApplyInitTime_))):(this.cache_.currentTime=this.techGet_("currentTime")||0,this.cache_.currentTime)},e.applyInitTime_=function(){this.currentTime(this.cache_.initTime)},e.duration=function(e){if(void 0===e)return void 0!==this.cache_.duration?this.cache_.duration:NaN;(e=(e=parseFloat(e))<0?1/0:e)!==this.cache_.duration&&((this.cache_.duration=e)===1/0?this.addClass("vjs-live"):this.removeClass("vjs-live"),isNaN(e)||this.trigger("durationchange"))},e.remainingTime=function(){return this.duration()-this.currentTime()},e.remainingTimeDisplay=function(){return Math.floor(this.duration())-Math.floor(this.currentTime())},e.buffered=function(){var e;return e=!(e=this.techGet_("buffered"))||!e.length?vt(0,0):e},e.bufferedPercent=function(){return _t(this.buffered(),this.duration())},e.bufferedEnd=function(){var e=this.buffered(),t=this.duration(),e=e.end(e.length-1);return e=t<e?t:e},e.volume=function(e){var t;return void 0!==e?(t=Math.max(0,Math.min(1,parseFloat(e))),this.cache_.volume=t,this.techCall_("setVolume",t),void(0<t&&this.lastVolume_(t))):(t=parseFloat(this.techGet_("volume")),isNaN(t)?1:t)},e.muted=function(e){if(void 0===e)return this.techGet_("muted")||!1;this.techCall_("setMuted",e)},e.defaultMuted=function(e){return void 0!==e?this.techCall_("setDefaultMuted",e):this.techGet_("defaultMuted")||!1},e.lastVolume_=function(e){if(void 0===e||0===e)return this.cache_.lastVolume;this.cache_.lastVolume=e},e.supportsFullScreen=function(){return this.techGet_("supportsFullScreen")||!1},e.isFullscreen=function(e){if(void 0===e)return this.isFullscreen_;var t=this.isFullscreen_;this.isFullscreen_=Boolean(e),this.isFullscreen_!==t&&this.fsApi_.prefixed&&this.trigger("fullscreenchange"),this.toggleFullscreenClass_()},e.requestFullscreen=function(s){var e=this.options_.Promise||window.Promise;if(e){var o=this;return new e(function(e,i){function n(){o.off("fullscreenerror",r),o.off("fullscreenchange",t)}function t(){n(),e()}function r(e,t){n(),i(t)}o.one("fullscreenchange",t),o.one("fullscreenerror",r);var a=o.requestFullscreenHelper_(s);a&&(a.then(n,n),a.then(e,i))})}return this.requestFullscreenHelper_()},e.requestFullscreenHelper_=function(e){var t=this;if(this.fsApi_.prefixed||(i=this.options_.fullscreen&&this.options_.fullscreen.options||{},void 0!==e&&(i=e)),this.fsApi_.requestFullscreen){var i=this.el_[this.fsApi_.requestFullscreen](i);return i&&i.then(function(){return t.isFullscreen(!0)},function(){return t.isFullscreen(!1)}),i}this.tech_.supportsFullScreen()&&!0==!this.options_.preferFullWindow?this.techCall_("enterFullScreen"):this.enterFullWindow()},e.exitFullscreen=function(){var e=this.options_.Promise||window.Promise;if(e){var s=this;return new e(function(e,i){function n(){s.off("fullscreenerror",r),s.off("fullscreenchange",t)}function t(){n(),e()}function r(e,t){n(),i(t)}s.one("fullscreenchange",t),s.one("fullscreenerror",r);var a=s.exitFullscreenHelper_();a&&(a.then(n,n),a.then(e,i))})}return this.exitFullscreenHelper_()},e.exitFullscreenHelper_=function(){var e=this;if(this.fsApi_.requestFullscreen){var t=document[this.fsApi_.exitFullscreen]();return t&&Et(t.then(function(){return e.isFullscreen(!1)})),t}this.tech_.supportsFullScreen()&&!0==!this.options_.preferFullWindow?this.techCall_("exitFullScreen"):this.exitFullWindow()},e.enterFullWindow=function(){this.isFullscreen(!0),this.isFullWindow=!0,this.docOrigOverflow=document.documentElement.style.overflow,Be(document,"keydown",this.boundFullWindowOnEscKey_),document.documentElement.style.overflow="hidden",te(document.body,"vjs-full-window"),this.trigger("enterFullWindow")},e.fullWindowOnEscKey=function(e){ht.isEventKey(e,"Esc")&&!0===this.isFullscreen()&&(this.isFullWindow?this.exitFullWindow():this.exitFullscreen())},e.exitFullWindow=function(){this.isFullscreen(!1),this.isFullWindow=!1,Fe(document,"keydown",this.boundFullWindowOnEscKey_),document.documentElement.style.overflow=this.docOrigOverflow,ie(document.body,"vjs-full-window"),this.trigger("exitFullWindow")},e.disablePictureInPicture=function(e){if(void 0===e)return this.techGet_("disablePictureInPicture");this.techCall_("setDisablePictureInPicture",e),this.options_.disablePictureInPicture=e,this.trigger("disablepictureinpicturechanged")},e.isInPictureInPicture=function(e){return void 0!==e?(this.isInPictureInPicture_=!!e,void this.togglePictureInPictureClass_()):!!this.isInPictureInPicture_},e.requestPictureInPicture=function(){if("pictureInPictureEnabled"in document&&!1===this.disablePictureInPicture())return this.techGet_("requestPictureInPicture")},e.exitPictureInPicture=function(){if("pictureInPictureEnabled"in document)return document.exitPictureInPicture()},e.handleKeyDown=function(e){var t=this.options_.userActions;t&&t.hotkeys&&(function(e){var t=e.tagName.toLowerCase();if(e.isContentEditable)return!0;if("input"===t)return-1===["button","checkbox","hidden","radio","reset","submit"].indexOf(e.type);return-1!==["textarea"].indexOf(t)}(this.el_.ownerDocument.activeElement)||("function"==typeof t.hotkeys?t.hotkeys.call(this,e):this.handleHotkeys(e)))},e.handleHotkeys=function(e){var t=this.options_.userActions?this.options_.userActions.hotkeys:{},i=t.fullscreenKey,n=t.muteKey,n=void 0===n?function(e){return ht.isEventKey(e,"m")}:n,t=t.playPauseKey,t=void 0===t?function(e){return ht.isEventKey(e,"k")||ht.isEventKey(e,"Space")}:t;(void 0===i?function(e){return ht.isEventKey(e,"f")}:i).call(this,e)?(e.preventDefault(),e.stopPropagation(),i=pt.getComponent("FullscreenToggle"),!1!==document[this.fsApi_.fullscreenEnabled]&&i.prototype.handleClick.call(this,e)):n.call(this,e)?(e.preventDefault(),e.stopPropagation(),pt.getComponent("MuteToggle").prototype.handleClick.call(this,e)):t.call(this,e)&&(e.preventDefault(),e.stopPropagation(),pt.getComponent("PlayToggle").prototype.handleClick.call(this,e))},e.canPlayType=function(e){for(var t,i=0,n=this.options_.techOrder;i<n.length;i++){var r=n[i],a=ji.getTech(r);if(a=a||pt.getComponent(r)){if(a.isSupported()&&(t=a.canPlayType(e)))return t}else h.error('The "'+r+'" tech is undefined. Skipped browser support check for that tech.')}return""},e.selectSource=function(e){function t(e,i,n){var r;return e.some(function(t){return i.some(function(e){if(r=n(t,e))return!0})}),r}var i,n=this,r=this.options_.techOrder.map(function(e){return[e,ji.getTech(e)]}).filter(function(e){var t=e[0],e=e[1];return e?e.isSupported():(h.error('The "'+t+'" tech is undefined. Skipped browser support check for that tech.'),!1)}),a=function(e,t){var i=e[0];if(e[1].canPlaySource(t,n.options_[i.toLowerCase()]))return{source:t,tech:i}},a=this.options_.sourceOrder?t(e,r,(i=a,function(e,t){return i(t,e)})):t(r,e,a);return a||!1},e.handleSrc_=function(e,n){var r=this;if("undefined"==typeof e)return this.cache_.src||"";this.resetRetryOnError_&&this.resetRetryOnError_();var t,i,a=Ji(e);a.length?(this.changingSrc_=!0,n||(this.cache_.sources=a),this.updateSourceCaches_(a[0]),Wi(this,a[0],function(e,t){var i;return r.middleware_=t,n||(r.cache_.sources=a),r.updateSourceCaches_(e),r.src_(e)?1<a.length?r.handleSrc_(a.slice(1)):(r.changingSrc_=!1,r.setTimeout(function(){this.error({code:4,message:this.localize(this.options_.notSupportedMessage)})},0),void r.triggerReady()):(t=t,i=r.tech_,void t.forEach(function(e){return e.setTech&&e.setTech(i)}))}),this.options_.retryOnError&&1<a.length&&(i=function(){r.off("error",t)},this.one("error",t=function(){r.error(null),r.handleSrc_(a.slice(1),!0)}),this.one("playing",i),this.resetRetryOnError_=function(){r.off("error",t),r.off("playing",i)})):this.setTimeout(function(){this.error({code:4,message:this.localize(this.options_.notSupportedMessage)})},0)},e.src=function(e){return this.handleSrc_(e,!1)},e.src_=function(e){var t,i,n=this,r=this.selectSource([e]);return!r||(t=r.tech,i=this.techName_,ut(t)!==ut(i)?(this.changingSrc_=!0,this.loadTech_(r.tech,r.source),this.tech_.ready(function(){n.changingSrc_=!1})):this.ready(function(){this.tech_.constructor.prototype.hasOwnProperty("setSource")?this.techCall_("setSource",e):this.techCall_("src",e.src),this.changingSrc_=!1},!0),!1)},e.load=function(){this.techCall_("load")},e.reset=function(){var e=this,t=this.options_.Promise||window.Promise;this.paused()||!t?this.doReset_():Et(this.play().then(function(){return e.doReset_()}))},e.doReset_=function(){this.tech_&&this.tech_.clearTracks("text"),this.resetCache_(),this.poster(""),this.loadTech_(this.options_.techOrder[0],null),this.techCall_("reset"),this.resetControlBarUI_(),it(this)&&this.trigger("playerreset")},e.resetControlBarUI_=function(){this.resetProgressBar_(),this.resetPlaybackRate_(),this.resetVolumeBar_()},e.resetProgressBar_=function(){this.currentTime(0);var e=this.controlBar,t=e.durationDisplay,e=e.remainingTimeDisplay;t&&t.updateContent(),e&&e.updateContent()},e.resetPlaybackRate_=function(){this.playbackRate(this.defaultPlaybackRate()),this.handleTechRateChange_()},e.resetVolumeBar_=function(){this.volume(1),this.trigger("volumechange")},e.currentSources=function(){var e=this.currentSource(),t=[];return 0!==Object.keys(e).length&&t.push(e),this.cache_.sources||t},e.currentSource=function(){return this.cache_.source||{}},e.currentSrc=function(){return this.currentSource()&&this.currentSource().src||""},e.currentType=function(){return this.currentSource()&&this.currentSource().type||""},e.preload=function(e){return void 0!==e?(this.techCall_("setPreload",e),void(this.options_.preload=e)):this.techGet_("preload")},e.autoplay=function(e){if(void 0===e)return this.options_.autoplay||!1;var t;"string"==typeof e&&/(any|play|muted)/.test(e)||!0===e&&this.options_.normalizeAutoplay?(this.options_.autoplay=e,this.manualAutoplay_("string"==typeof e?e:"play"),t=!1):this.options_.autoplay=!!e,t="undefined"==typeof t?this.options_.autoplay:t,this.tech_&&this.techCall_("setAutoplay",t)},e.playsinline=function(e){return void 0!==e?(this.techCall_("setPlaysinline",e),this.options_.playsinline=e,this):this.techGet_("playsinline")},e.loop=function(e){return void 0!==e?(this.techCall_("setLoop",e),void(this.options_.loop=e)):this.techGet_("loop")},e.poster=function(e){if(void 0===e)return this.poster_;(e=e||"")!==this.poster_&&(this.poster_=e,this.techCall_("setPoster",e),this.isPosterFromTech_=!1,this.trigger("posterchange"))},e.handleTechPosterChange_=function(){var e;this.poster_&&!this.options_.techCanOverridePoster||!this.tech_||!this.tech_.poster||(e=this.tech_.poster()||"")!==this.poster_&&(this.poster_=e,this.isPosterFromTech_=!0,this.trigger("posterchange"))},e.controls=function(e){if(void 0===e)return!!this.controls_;this.controls_!==(e=!!e)&&(this.controls_=e,this.usingNativeControls()&&this.techCall_("setControls",e),this.controls_?(this.removeClass("vjs-controls-disabled"),this.addClass("vjs-controls-enabled"),this.trigger("controlsenabled"),this.usingNativeControls()||this.addTechControlsListeners_()):(this.removeClass("vjs-controls-enabled"),this.addClass("vjs-controls-disabled"),this.trigger("controlsdisabled"),this.usingNativeControls()||this.removeTechControlsListeners_()))},e.usingNativeControls=function(e){if(void 0===e)return!!this.usingNativeControls_;this.usingNativeControls_!==(e=!!e)&&(this.usingNativeControls_=e,this.usingNativeControls_?(this.addClass("vjs-using-native-controls"),this.trigger("usingnativecontrols")):(this.removeClass("vjs-using-native-controls"),this.trigger("usingcustomcontrols")))},e.error=function(t){var i=this;if(void 0===t)return this.error_||null;if(a("beforeerror").forEach(function(e){e=e(i,t);T(e)&&!Array.isArray(e)||"string"==typeof e||"number"==typeof e||null===e?t=e:i.log.error("please return a value that MediaError expects in beforeerror hooks")}),this.options_.suppressNotSupportedError&&t&&4===t.code){var e=function(){this.error(t)};return this.options_.suppressNotSupportedError=!1,this.any(["click","touchstart"],e),void this.one("loadstart",function(){this.off(["click","touchstart"],e)})}if(null===t)return this.error_=t,this.removeClass("vjs-error"),void(this.errorDisplay&&this.errorDisplay.close());this.error_=new bt(t),this.addClass("vjs-error"),h.error("(CODE:"+this.error_.code+" "+bt.errorTypes[this.error_.code]+")",this.error_.message,this.error_),this.trigger("error"),a("error").forEach(function(e){return e(i,i.error_)})},e.reportUserActivity=function(e){this.userActivity_=!0},e.userActive=function(e){if(void 0===e)return this.userActive_;if((e=!!e)!==this.userActive_){if(this.userActive_=e,this.userActive_)return this.userActivity_=!0,this.removeClass("vjs-user-inactive"),this.addClass("vjs-user-active"),void this.trigger("useractive");this.tech_&&this.tech_.one("mousemove",function(e){e.stopPropagation(),e.preventDefault()}),this.userActivity_=!1,this.removeClass("vjs-user-active"),this.addClass("vjs-user-inactive"),this.trigger("userinactive")}},e.listenForUserActivity_=function(){var t,i,n,r=Ve(this,this.reportUserActivity),e=function(e){r(),this.clearInterval(t)};this.on("mousedown",function(){r(),this.clearInterval(t),t=this.setInterval(r,250)}),this.on("mousemove",function(e){e.screenX===i&&e.screenY===n||(i=e.screenX,n=e.screenY,r())}),this.on("mouseup",e),this.on("mouseleave",e);var a,e=this.getChild("controlBar");!e||q||A||(e.on("mouseenter",function(e){0!==this.player().options_.inactivityTimeout&&(this.player().cache_.inactivityTimeout=this.player().options_.inactivityTimeout),this.player().options_.inactivityTimeout=0}),e.on("mouseleave",function(e){this.player().options_.inactivityTimeout=this.player().cache_.inactivityTimeout})),this.on("keydown",r),this.on("keyup",r),this.setInterval(function(){var e;this.userActivity_&&(this.userActivity_=!1,this.userActive(!0),this.clearTimeout(a),(e=this.options_.inactivityTimeout)<=0||(a=this.setTimeout(function(){this.userActivity_||this.userActive(!1)},e)))},250)},e.playbackRate=function(e){if(void 0===e)return this.tech_&&this.tech_.featuresPlaybackRate?this.cache_.lastPlaybackRate||this.techGet_("playbackRate"):1;this.techCall_("setPlaybackRate",e)},e.defaultPlaybackRate=function(e){return void 0!==e?this.techCall_("setDefaultPlaybackRate",e):this.tech_&&this.tech_.featuresPlaybackRate?this.techGet_("defaultPlaybackRate"):1},e.isAudio=function(e){if(void 0===e)return!!this.isAudio_;this.isAudio_=!!e},e.addTextTrack=function(e,t,i){if(this.tech_)return this.tech_.addTextTrack(e,t,i)},e.addRemoteTextTrack=function(e,t){if(this.tech_)return this.tech_.addRemoteTextTrack(e,t)},e.removeRemoteTextTrack=function(e){var t=(t=(e=void 0===e?{}:e).track)||e;if(this.tech_)return this.tech_.removeRemoteTextTrack(t)},e.getVideoPlaybackQuality=function(){return this.techGet_("getVideoPlaybackQuality")},e.videoWidth=function(){return this.tech_&&this.tech_.videoWidth&&this.tech_.videoWidth()||0},e.videoHeight=function(){return this.tech_&&this.tech_.videoHeight&&this.tech_.videoHeight()||0},e.language=function(e){if(void 0===e)return this.language_;this.language_!==String(e).toLowerCase()&&(this.language_=String(e).toLowerCase(),it(this)&&this.trigger("languagechange"))},e.languages=function(){return lt(o.prototype.options_.languages,this.languages_)},e.toJSON=function(){var e=lt(this.options_),t=e.tracks;e.tracks=[];for(var i=0;i<t.length;i++){var n=t[i];(n=lt(n)).player=void 0,e.tracks[i]=n}return e},e.createModal=function(e,t){var i=this;(t=t||{}).content=e||"";var n=new At(this,t);return this.addChild(n),n.on("dispose",function(){i.removeChild(n)}),n.open(),n},e.updateCurrentBreakpoint_=function(){if(this.responsive())for(var e=this.currentBreakpoint(),t=this.currentWidth(),i=0;i<Nn.length;i++){var n=Nn[i];if(t<=this.breakpoints_[n]){if(e===n)return;e&&this.removeClass(Un[e]),this.addClass(Un[n]),this.breakpoint_=n;break}}},e.removeCurrentBreakpoint_=function(){var 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this.numSameDts_--,void(this.numSameDts_||(this.ignoreNextEqualDts_=!1));i=Ee(e.pts,i),this.captionPackets_=this.captionPackets_.concat(i),this.latestDts_!==e.dts&&(this.numSameDts_=0),this.numSameDts_++,this.latestDts_=e.dts}},Ie.prototype.flushCCStreams=function(t){this.ccStreams_.forEach(function(e){return"flush"===t?e.flush():e.partialFlush()},this)},Ie.prototype.flushStream=function(e){this.captionPackets_.length&&(this.captionPackets_.forEach(function(e,t){e.presortIndex=t}),this.captionPackets_.sort(function(e,t){return e.pts===t.pts?e.presortIndex-t.presortIndex:e.pts-t.pts}),this.captionPackets_.forEach(function(e){e.type<2?this.dispatchCea608Packet(e):this.dispatchCea708Packet(e)},this),this.captionPackets_.length=0),this.flushCCStreams(e)},Ie.prototype.flush=function(){return this.flushStream("flush")},Ie.prototype.partialFlush=function(){return this.flushStream("partialFlush")},Ie.prototype.reset=function(){this.latestDts_=null,this.ignoreNextEqualDts_=!1,this.numSameDts_=0,this.activeCea608Channel_=[null,null],this.ccStreams_.forEach(function(e){e.reset()})},Ie.prototype.dispatchCea608Packet=function(e){this.setsTextOrXDSActive(e)?this.activeCea608Channel_[e.type]=null:this.setsChannel1Active(e)?this.activeCea608Channel_[e.type]=0:this.setsChannel2Active(e)&&(this.activeCea608Channel_[e.type]=1),null!==this.activeCea608Channel_[e.type]&&this.ccStreams_[(e.type<<1)+this.activeCea608Channel_[e.type]].push(e)},Ie.prototype.setsChannel1Active=function(e){return 4096==(30720&e.ccData)},Ie.prototype.setsChannel2Active=function(e){return 6144==(30720&e.ccData)},Ie.prototype.setsTextOrXDSActive=function(e){return 256==(28928&e.ccData)||4138==(30974&e.ccData)||6186==(30974&e.ccData)},Ie.prototype.dispatchCea708Packet=function(e){this.parse708captions_&&this.cc708Stream_.push(e)};function xe(e){return 32<=e&&e<=127||160<=e&&e<=255}function Ae(e){this.windowNum=e,this.reset()}var Pe={127:9834,4128:32,4129:160,4133:8230,4138:352,4140:338,4144:9608,4145:8216,4146:8217,4147:8220,4148:8221,4149:8226,4153:8482,4154:353,4156:339,4157:8480,4159:376,4214:8539,4215:8540,4216:8541,4217:8542,4218:9168,4219:9124,4220:9123,4221:9135,4222:9126,4223:9121,4256:12600};Ae.prototype.reset=function(){this.clearText(),this.pendingNewLine=!1,this.winAttr={},this.penAttr={},this.penLoc={},this.penColor={},this.visible=0,this.rowLock=0,this.columnLock=0,this.priority=0,this.relativePositioning=0,this.anchorVertical=0,this.anchorHorizontal=0,this.anchorPoint=0,this.rowCount=1,this.virtualRowCount=this.rowCount+1,this.columnCount=41,this.windowStyle=0,this.penStyle=0},Ae.prototype.getText=function(){return this.rows.join("\n")},Ae.prototype.clearText=function(){this.rows=[""],this.rowIdx=0},Ae.prototype.newLine=function(e){for(this.rows.length>=this.virtualRowCount&&"function"==typeof this.beforeRowOverflow&&this.beforeRowOverflow(e),0<this.rows.length&&(this.rows.push(""),this.rowIdx++);this.rows.length>this.virtualRowCount;)this.rows.shift(),this.rowIdx--},Ae.prototype.isEmpty=function(){return 0===this.rows.length||1===this.rows.length&&""===this.rows[0]},Ae.prototype.addText=function(e){this.rows[this.rowIdx]+=e},Ae.prototype.backspace=function(){var e;this.isEmpty()||(e=this.rows[this.rowIdx],this.rows[this.rowIdx]=e.substr(0,e.length-1))};function Le(e,t,i){this.serviceNum=e,this.text="",this.currentWindow=new Ae(-1),this.windows=[],this.stream=i,"string"==typeof t&&this.createTextDecoder(t)}Le.prototype.init=function(e,t){this.startPts=e;for(var i=0;i<8;i++)this.windows[i]=new Ae(i),"function"==typeof t&&(this.windows[i].beforeRowOverflow=t)},Le.prototype.setCurrentWindow=function(e){this.currentWindow=this.windows[e]},Le.prototype.createTextDecoder=function(t){if("undefined"==typeof TextDecoder)this.stream.trigger("log",{level:"warn",message:"The `encoding` option is unsupported without TextDecoder support"});else try{this.textDecoder_=new TextDecoder(t)}catch(e){this.stream.trigger("log",{level:"warn",message:"TextDecoder could not be created with "+t+" encoding. "+e})}};var De=function e(t){t=t||{},e.prototype.init.call(this);var i,n=this,r=t.captionServices||{},a={};Object.keys(r).forEach(function(e){i=r[e],/^SERVICE/.test(e)&&(a[e]=i.encoding)}),this.serviceEncodings=a,this.current708Packet=null,this.services={},this.push=function(e){(3===e.type||null===n.current708Packet)&&n.new708Packet(),n.add708Bytes(e)}};De.prototype=new j,De.prototype.new708Packet=function(){null!==this.current708Packet&&this.push708Packet(),this.current708Packet={data:[],ptsVals:[]}},De.prototype.add708Bytes=function(e){var t=e.ccData,i=t>>>8,t=255&t;this.current708Packet.ptsVals.push(e.pts),this.current708Packet.data.push(i),this.current708Packet.data.push(t)},De.prototype.push708Packet=function(){var e,t=this.current708Packet,i=t.data,n=null,r=0,a=i[r++];for(t.seq=a>>6,t.sizeCode=63&a;r<i.length;r++)e=31&(a=i[r++]),7===(n=a>>5)&&0<e&&(n=i[r++]),this.pushServiceBlock(n,r,e),0<e&&(r+=e-1)},De.prototype.pushServiceBlock=function(e,t,i){for(var n,r=t,a=this.current708Packet.data,s=(s=this.services[e])||this.initService(e,r);r<t+i&&r<a.length;r++)n=a[r],xe(n)?r=this.handleText(r,s):24===n?r=this.multiByteCharacter(r,s):16===n?r=this.extendedCommands(r,s):128<=n&&n<=135?r=this.setCurrentWindow(r,s):152<=n&&n<=159?r=this.defineWindow(r,s):136===n?r=this.clearWindows(r,s):140===n?r=this.deleteWindows(r,s):137===n?r=this.displayWindows(r,s):138===n?r=this.hideWindows(r,s):139===n?r=this.toggleWindows(r,s):151===n?r=this.setWindowAttributes(r,s):144===n?r=this.setPenAttributes(r,s):145===n?r=this.setPenColor(r,s):146===n?r=this.setPenLocation(r,s):143===n?s=this.reset(r,s):8===n?s.currentWindow.backspace():12===n?s.currentWindow.clearText():13===n?s.currentWindow.pendingNewLine=!0:14===n?s.currentWindow.clearText():141===n&&r++},De.prototype.extendedCommands=function(e,t){var i=this.current708Packet.data[++e];return e=xe(i)?this.handleText(e,t,{isExtended:!0}):e},De.prototype.getPts=function(e){return this.current708Packet.ptsVals[Math.floor(e/2)]},De.prototype.initService=function(t,e){var i,n="SERVICE"+t,r=this;return n in this.serviceEncodings&&(i=this.serviceEncodings[n]),this.services[t]=new Le(t,i,r),this.services[t].init(this.getPts(e),function(e){r.flushDisplayed(e,r.services[t])}),this.services[t]},De.prototype.handleText=function(e,t,i){var n,r=i&&i.isExtended,a=i&&i.isMultiByte,s=this.current708Packet.data,o=r?4096:0,u=s[e],i=s[e+1],s=t.currentWindow,l=t.textDecoder_&&!r?(a?(n=[u,i],e++):n=[u],t.textDecoder_.decode(new Uint8Array(n))):(l=Pe[u=o|u]||u,4096&u&&u===l?"":String.fromCharCode(l));return s.pendingNewLine&&!s.isEmpty()&&s.newLine(this.getPts(e)),s.pendingNewLine=!1,s.addText(l),e},De.prototype.multiByteCharacter=function(e,t){var i=this.current708Packet.data,n=i[e+1],i=i[e+2];return e=xe(n)&&xe(i)?this.handleText(++e,t,{isMultiByte:!0}):e},De.prototype.setCurrentWindow=function(e,t){var i=this.current708Packet.data[e];return t.setCurrentWindow(7&i),e},De.prototype.defineWindow=function(e,t){var i=this.current708Packet.data,n=i[e];t.setCurrentWindow(7&n);t=t.currentWindow,n=i[++e];return t.visible=(32&n)>>5,t.rowLock=(16&n)>>4,t.columnLock=(8&n)>>3,t.priority=7&n,n=i[++e],t.relativePositioning=(128&n)>>7,t.anchorVertical=127&n,n=i[++e],t.anchorHorizontal=n,n=i[++e],t.anchorPoint=(240&n)>>4,t.rowCount=15&n,n=i[++e],t.columnCount=63&n,n=i[++e],t.windowStyle=(56&n)>>3,t.penStyle=7&n,t.virtualRowCount=t.rowCount+1,e},De.prototype.setWindowAttributes=function(e,t){var i=this.current708Packet.data,n=i[e],t=t.currentWindow.winAttr,n=i[++e];return t.fillOpacity=(192&n)>>6,t.fillRed=(48&n)>>4,t.fillGreen=(12&n)>>2,t.fillBlue=3&n,n=i[++e],t.borderType=(192&n)>>6,t.borderRed=(48&n)>>4,t.borderGreen=(12&n)>>2,t.borderBlue=3&n,n=i[++e],t.borderType+=(128&n)>>5,t.wordWrap=(64&n)>>6,t.printDirection=(48&n)>>4,t.scrollDirection=(12&n)>>2,t.justify=3&n,n=i[++e],t.effectSpeed=(240&n)>>4,t.effectDirection=(12&n)>>2,t.displayEffect=3&n,e},De.prototype.flushDisplayed=function(e,t){for(var i=[],n=0;n<8;n++)t.windows[n].visible&&!t.windows[n].isEmpty()&&i.push(t.windows[n].getText());t.endPts=e,t.text=i.join("\n\n"),this.pushCaption(t),t.startPts=e},De.prototype.pushCaption=function(e){""!==e.text&&(this.trigger("data",{startPts:e.startPts,endPts:e.endPts,text:e.text,stream:"cc708_"+e.serviceNum}),e.text="",e.startPts=e.endPts)},De.prototype.displayWindows=function(e,t){var i=this.current708Packet.data[++e],n=this.getPts(e);this.flushDisplayed(n,t);for(var r=0;r<8;r++)i&1<<r&&(t.windows[r].visible=1);return e},De.prototype.hideWindows=function(e,t){var i=this.current708Packet.data[++e],n=this.getPts(e);this.flushDisplayed(n,t);for(var r=0;r<8;r++)i&1<<r&&(t.windows[r].visible=0);return e},De.prototype.toggleWindows=function(e,t){var i=this.current708Packet.data[++e],n=this.getPts(e);this.flushDisplayed(n,t);for(var r=0;r<8;r++)i&1<<r&&(t.windows[r].visible^=1);return e},De.prototype.clearWindows=function(e,t){var i=this.current708Packet.data[++e],n=this.getPts(e);this.flushDisplayed(n,t);for(var r=0;r<8;r++)i&1<<r&&t.windows[r].clearText();return e},De.prototype.deleteWindows=function(e,t){var i=this.current708Packet.data[++e],n=this.getPts(e);this.flushDisplayed(n,t);for(var r=0;r<8;r++)i&1<<r&&t.windows[r].reset();return e},De.prototype.setPenAttributes=function(e,t){var i=this.current708Packet.data,n=i[e],t=t.currentWindow.penAttr,n=i[++e];return t.textTag=(240&n)>>4,t.offset=(12&n)>>2,t.penSize=3&n,n=i[++e],t.italics=(128&n)>>7,t.underline=(64&n)>>6,t.edgeType=(56&n)>>3,t.fontStyle=7&n,e},De.prototype.setPenColor=function(e,t){var i=this.current708Packet.data,n=i[e],t=t.currentWindow.penColor,n=i[++e];return t.fgOpacity=(192&n)>>6,t.fgRed=(48&n)>>4,t.fgGreen=(12&n)>>2,t.fgBlue=3&n,n=i[++e],t.bgOpacity=(192&n)>>6,t.bgRed=(48&n)>>4,t.bgGreen=(12&n)>>2,t.bgBlue=3&n,n=i[++e],t.edgeRed=(48&n)>>4,t.edgeGreen=(12&n)>>2,t.edgeBlue=3&n,e},De.prototype.setPenLocation=function(e,t){var i=this.current708Packet.data,n=i[e],r=t.currentWindow.penLoc;return t.currentWindow.pendingNewLine=!0,n=i[++e],r.row=15&n,n=i[++e],r.column=63&n,e},De.prototype.reset=function(e,t){var i=this.getPts(e);return this.flushDisplayed(i,t),this.initService(t.serviceNum,e)};function Oe(e){return null===e?"":(e=Me[e]||e,String.fromCharCode(e))}function Re(){for(var e=[],t=15;t--;)e.push("");return e}var Me={42:225,92:233,94:237,95:243,96:250,123:231,124:247,125:209,126:241,127:9608,304:174,305:176,306:189,307:191,308:8482,309:162,310:163,311:9834,312:224,313:160,314:232,315:226,316:234,317:238,318:244,319:251,544:193,545:201,546:211,547:218,548:220,549:252,550:8216,551:161,552:42,553:39,554:8212,555:169,556:8480,557:8226,558:8220,559:8221,560:192,561:194,562:199,563:200,564:202,565:203,566:235,567:206,568:207,569:239,570:212,571:217,572:249,573:219,574:171,575:187,800:195,801:227,802:205,803:204,804:236,805:210,806:242,807:213,808:245,809:123,810:125,811:92,812:94,813:95,814:124,815:126,816:196,817:228,818:214,819:246,820:223,821:165,822:164,823:9474,824:197,825:229,826:216,827:248,828:9484,829:9488,830:9492,831:9496},Ne=[4352,4384,4608,4640,5376,5408,5632,5664,5888,5920,4096,4864,4896,5120,5152],Ue=function e(t,i){e.prototype.init.call(this),this.field_=t||0,this.dataChannel_=i||0,this.name_="CC"+(1+(this.field_<<1|this.dataChannel_)),this.setConstants(),this.reset(),this.push=function(e){var t,i,n,r,a=32639&e.ccData;a!==this.lastControlCode_?(4096==(61440&a)?this.lastControlCode_=a:a!==this.PADDING_&&(this.lastControlCode_=null),t=a>>>8,i=255&a,a===this.PADDING_||(a===this.RESUME_CAPTION_LOADING_?this.mode_="popOn":a===this.END_OF_CAPTION_?(this.mode_="popOn",this.clearFormatting(e.pts),this.flushDisplayed(e.pts),r=this.displayed_,this.displayed_=this.nonDisplayed_,this.nonDisplayed_=r,this.startPts_=e.pts):a===this.ROLL_UP_2_ROWS_?(this.rollUpRows_=2,this.setRollUp(e.pts)):a===this.ROLL_UP_3_ROWS_?(this.rollUpRows_=3,this.setRollUp(e.pts)):a===this.ROLL_UP_4_ROWS_?(this.rollUpRows_=4,this.setRollUp(e.pts)):a===this.CARRIAGE_RETURN_?(this.clearFormatting(e.pts),this.flushDisplayed(e.pts),this.shiftRowsUp_(),this.startPts_=e.pts):a===this.BACKSPACE_?"popOn"===this.mode_?this.nonDisplayed_[this.row_]=this.nonDisplayed_[this.row_].slice(0,-1):this.displayed_[this.row_]=this.displayed_[this.row_].slice(0,-1):a===this.ERASE_DISPLAYED_MEMORY_?(this.flushDisplayed(e.pts),this.displayed_=Re()):a===this.ERASE_NON_DISPLAYED_MEMORY_?this.nonDisplayed_=Re():a===this.RESUME_DIRECT_CAPTIONING_?("paintOn"!==this.mode_&&(this.flushDisplayed(e.pts),this.displayed_=Re()),this.mode_="paintOn",this.startPts_=e.pts):this.isSpecialCharacter(t,i)?(n=Oe((t=(3&t)<<8)|i),this[this.mode_](e.pts,n),this.column_++):this.isExtCharacter(t,i)?("popOn"===this.mode_?this.nonDisplayed_[this.row_]=this.nonDisplayed_[this.row_].slice(0,-1):this.displayed_[this.row_]=this.displayed_[this.row_].slice(0,-1),n=Oe((t=(3&t)<<8)|i),this[this.mode_](e.pts,n),this.column_++):this.isMidRowCode(t,i)?(this.clearFormatting(e.pts),this[this.mode_](e.pts," "),this.column_++,14==(14&i)&&this.addFormatting(e.pts,["i"]),1==(1&i)&&this.addFormatting(e.pts,["u"])):this.isOffsetControlCode(t,i)?this.column_+=3&i:this.isPAC(t,i)?(r=Ne.indexOf(7968&a),"rollUp"===this.mode_&&(r-this.rollUpRows_+1<0&&(r=this.rollUpRows_-1),this.setRollUp(e.pts,r)),r!==this.row_&&(this.clearFormatting(e.pts),this.row_=r),1&i&&-1===this.formatting_.indexOf("u")&&this.addFormatting(e.pts,["u"]),16==(16&a)&&(this.column_=4*((14&a)>>1)),this.isColorPAC(i)&&14==(14&i)&&this.addFormatting(e.pts,["i"])):this.isNormalChar(t)&&(0===i&&(i=null),n=Oe(t),n+=Oe(i),this[this.mode_](e.pts,n),this.column_+=n.length))):this.lastControlCode_=null}};Ue.prototype=new j,Ue.prototype.flushDisplayed=function(e){var t=this.displayed_.map(function(e,t){try{return e.trim()}catch(e){return this.trigger("log",{level:"warn",message:"Skipping a malformed 608 caption at index "+t+"."}),""}},this).join("\n").replace(/^\n+|\n+$/g,"");t.length&&this.trigger("data",{startPts:this.startPts_,endPts:e,text:t,stream:this.name_})},Ue.prototype.reset=function(){this.mode_="popOn",this.topRow_=0,this.startPts_=0,this.displayed_=Re(),this.nonDisplayed_=Re(),this.lastControlCode_=null,this.column_=0,this.row_=14,this.rollUpRows_=2,this.formatting_=[]},Ue.prototype.setConstants=function(){0===this.dataChannel_?(this.BASE_=16,this.EXT_=17,this.CONTROL_=(20|this.field_)<<8,this.OFFSET_=23):1===this.dataChannel_&&(this.BASE_=24,this.EXT_=25,this.CONTROL_=(28|this.field_)<<8,this.OFFSET_=31),this.PADDING_=0,this.RESUME_CAPTION_LOADING_=32|this.CONTROL_,this.END_OF_CAPTION_=47|this.CONTROL_,this.ROLL_UP_2_ROWS_=37|this.CONTROL_,this.ROLL_UP_3_ROWS_=38|this.CONTROL_,this.ROLL_UP_4_ROWS_=39|this.CONTROL_,this.CARRIAGE_RETURN_=45|this.CONTROL_,this.RESUME_DIRECT_CAPTIONING_=41|this.CONTROL_,this.BACKSPACE_=33|this.CONTROL_,this.ERASE_DISPLAYED_MEMORY_=44|this.CONTROL_,this.ERASE_NON_DISPLAYED_MEMORY_=46|this.CONTROL_},Ue.prototype.isSpecialCharacter=function(e,t){return e===this.EXT_&&48<=t&&t<=63},Ue.prototype.isExtCharacter=function(e,t){return(e===this.EXT_+1||e===this.EXT_+2)&&32<=t&&t<=63},Ue.prototype.isMidRowCode=function(e,t){return e===this.EXT_&&32<=t&&t<=47},Ue.prototype.isOffsetControlCode=function(e,t){return e===this.OFFSET_&&33<=t&&t<=35},Ue.prototype.isPAC=function(e,t){return e>=this.BASE_&&e<this.BASE_+8&&64<=t&&t<=127},Ue.prototype.isColorPAC=function(e){return 64<=e&&e<=79||96<=e&&e<=127},Ue.prototype.isNormalChar=function(e){return 32<=e&&e<=127},Ue.prototype.setRollUp=function(e,t){if("rollUp"!==this.mode_&&(this.row_=14,this.mode_="rollUp",this.flushDisplayed(e),this.nonDisplayed_=Re(),this.displayed_=Re()),void 0!==t&&t!==this.row_)for(var i=0;i<this.rollUpRows_;i++)this.displayed_[t-i]=this.displayed_[this.row_-i],this.displayed_[this.row_-i]="";void 0===t&&(t=this.row_),this.topRow_=t-this.rollUpRows_+1},Ue.prototype.addFormatting=function(e,t){this.formatting_=this.formatting_.concat(t);t=t.reduce(function(e,t){return e+"<"+t+">"},"");this[this.mode_](e,t)},Ue.prototype.clearFormatting=function(e){var t;this.formatting_.length&&(t=this.formatting_.reverse().reduce(function(e,t){return e+"</"+t+">"},""),this.formatting_=[],this[this.mode_](e,t))},Ue.prototype.popOn=function(e,t){var i=this.nonDisplayed_[this.row_];this.nonDisplayed_[this.row_]=i+=t},Ue.prototype.rollUp=function(e,t){var i=this.displayed_[this.row_];this.displayed_[this.row_]=i+=t},Ue.prototype.shiftRowsUp_=function(){for(var e=0;e<this.topRow_;e++)this.displayed_[e]="";for(e=this.row_+1;e<15;e++)this.displayed_[e]="";for(e=this.topRow_;e<this.row_;e++)this.displayed_[e]=this.displayed_[e+1];this.displayed_[this.row_]=""},Ue.prototype.paintOn=function(e,t){var i=this.displayed_[this.row_];this.displayed_[this.row_]=i+=t};function Be(e,t){var i=1;for(t<e&&(i=-1);4294967296<Math.abs(t-e);)e+=8589934592*i;return e}var Fe={CaptionStream:Ie,Cea608Stream:Ue,Cea708Stream:De},je={H264_STREAM_TYPE:27,ADTS_STREAM_TYPE:15,METADATA_STREAM_TYPE:21},e=function e(t){var i,n;e.prototype.init.call(this),this.type_=t||"shared",this.push=function(e){"shared"!==this.type_&&e.type!==this.type_||(void 0===n&&(n=e.dts),e.dts=Be(e.dts,n),e.pts=Be(e.pts,n),i=e.dts,this.trigger("data",e))},this.flush=function(){n=i,this.trigger("done")},this.endTimeline=function(){this.flush(),this.trigger("endedtimeline")},this.discontinuity=function(){i=n=void 0},this.reset=function(){this.discontinuity(),this.trigger("reset")}};e.prototype=new j;function He(e,t,i){for(var n="",r=t;r<i;r++)n+="%"+("00"+e[r].toString(16)).slice(-2);return n}function qe(e,t,i){return decodeURIComponent(He(e,t,i))}function Ve(e){return e[0]<<21|e[1]<<14|e[2]<<7|e[3]}var We=e,Ie=Be,Ge={TXXX:function(e){var t;if(3===e.data[0]){for(t=1;t<e.data.length;t++)if(0===e.data[t]){e.description=qe(e.data,1,t),e.value=qe(e.data,t+1,e.data.length).replace(/\0*$/,"");break}e.data=e.value}},WXXX:function(e){var t;if(3===e.data[0])for(t=1;t<e.data.length;t++)if(0===e.data[t]){e.description=qe(e.data,1,t),e.url=qe(e.data,t+1,e.data.length);break}},PRIV:function(e){for(var t,i=0;i<e.data.length;i++)if(0===e.data[i]){e.owner=(t=e.data,unescape(He(t,0,i)));break}e.privateData=e.data.subarray(i+1),e.data=e.privateData}},ze=function(e){var t,i={descriptor:e&&e.descriptor},u=0,l=[],c=0;if(ze.prototype.init.call(this),this.dispatchType=je.METADATA_STREAM_TYPE.toString(16),i.descriptor)for(t=0;t<i.descriptor.length;t++)this.dispatchType+=("00"+i.descriptor[t].toString(16)).slice(-2);this.push=function(e){var t,i,n,r,a,s,o;if("timed-metadata"===e.type)if(e.dataAlignmentIndicator&&(c=0,l.length=0),0===l.length&&(e.data.length<10||e.data[0]!=="I".charCodeAt(0)||e.data[1]!=="D".charCodeAt(0)||e.data[2]!=="3".charCodeAt(0)))this.trigger("log",{level:"warn",message:"Skipping unrecognized metadata packet"});else if(l.push(e),c+=e.data.byteLength,1===l.length&&(u=Ve(e.data.subarray(6,10)),u+=10),!(c<u)){for(t={data:new Uint8Array(u),frames:[],pts:l[0].pts,dts:l[0].dts},r=0;r<u;)t.data.set(l[0].data.subarray(0,u-r),r),r+=l[0].data.byteLength,c-=l[0].data.byteLength,l.shift();i=10,64&t.data[5]&&(i+=4,i+=Ve(t.data.subarray(10,14)),u-=Ve(t.data.subarray(16,20)));do{if((n=Ve(t.data.subarray(i+4,i+8)))<1)return void this.trigger("log",{level:"warn",message:"Malformed ID3 frame encountered. Skipping metadata parsing."})}while((o={id:String.fromCharCode(t.data[i],t.data[i+1],t.data[i+2],t.data[i+3]),data:t.data.subarray(i+10,i+n+10)}).key=o.id,Ge[o.id]&&(Ge[o.id](o),"com.apple.streaming.transportStreamTimestamp"===o.owner&&(s=(1&(a=o.data)[3])<<30|a[4]<<22|a[5]<<14|a[6]<<6|a[7]>>>2,s*=4,s+=3&a[7],o.timeStamp=s,void 0===t.pts&&void 0===t.dts&&(t.pts=o.timeStamp,t.dts=o.timeStamp),this.trigger("timestamp",o))),t.frames.push(o),i+=10,(i+=n)<u);this.trigger("data",t)}}};ze.prototype=new j;var Xe,Ke,e=ze,We=We,Ye=function(){var r=new Uint8Array(188),a=0;Ye.prototype.init.call(this),this.push=function(e){var t,i=0,n=188;for(a?((t=new Uint8Array(e.byteLength+a)).set(r.subarray(0,a)),t.set(e,a),a=0):t=e;n<t.byteLength;)71!==t[i]||71!==t[n]?(i++,n++):(this.trigger("data",t.subarray(i,n)),i+=188,n+=188);i<t.byteLength&&(r.set(t.subarray(i),0),a=t.byteLength-i)},this.flush=function(){188===a&&71===r[0]&&(this.trigger("data",r),a=0),this.trigger("done")},this.endTimeline=function(){this.flush(),this.trigger("endedtimeline")},this.reset=function(){a=0,this.trigger("reset")}};Ye.prototype=new j,(Xe=function(){var n,r,a,s;Xe.prototype.init.call(this),(s=this).packetsWaitingForPmt=[],this.programMapTable=void 0,n=function(e,t){var i=0;t.payloadUnitStartIndicator&&(i+=e[i]+1),("pat"===t.type?r:a)(e.subarray(i),t)},r=function(e,t){t.section_number=e[7],t.last_section_number=e[8],s.pmtPid=(31&e[10])<<8|e[11],t.pmtPid=s.pmtPid},a=function(e,t){var i,n;if(1&e[5]){for(s.programMapTable={video:null,audio:null,"timed-metadata":{}},i=3+((15&e[1])<<8|e[2])-4,n=12+((15&e[10])<<8|e[11]);n<i;){var r=e[n],a=(31&e[n+1])<<8|e[n+2];r===je.H264_STREAM_TYPE&&null===s.programMapTable.video?s.programMapTable.video=a:r===je.ADTS_STREAM_TYPE&&null===s.programMapTable.audio?s.programMapTable.audio=a:r===je.METADATA_STREAM_TYPE&&(s.programMapTable["timed-metadata"][a]=r),n+=5+((15&e[n+3])<<8|e[n+4])}t.programMapTable=s.programMapTable}},this.push=function(e){var t={},i=4;if(t.payloadUnitStartIndicator=!!(64&e[1]),t.pid=31&e[1],t.pid<<=8,t.pid|=e[2],1<(48&e[3])>>>4&&(i+=e[i]+1),0===t.pid)t.type="pat",n(e.subarray(i),t),this.trigger("data",t);else if(t.pid===this.pmtPid)for(t.type="pmt",n(e.subarray(i),t),this.trigger("data",t);this.packetsWaitingForPmt.length;)this.processPes_.apply(this,this.packetsWaitingForPmt.shift());else void 0===this.programMapTable?this.packetsWaitingForPmt.push([e,i,t]):this.processPes_(e,i,t)},this.processPes_=function(e,t,i){i.pid===this.programMapTable.video?i.streamType=je.H264_STREAM_TYPE:i.pid===this.programMapTable.audio?i.streamType=je.ADTS_STREAM_TYPE:i.streamType=this.programMapTable["timed-metadata"][i.pid],i.type="pes",i.data=e.subarray(t),this.trigger("data",i)}}).prototype=new j,Xe.STREAM_TYPES={h264:27,adts:15},(Ke=function(){function n(e,t,i){var n,r,a,s,o=new Uint8Array(e.size),u={type:t},l=0,c=0;if(e.data.length&&!(e.size<9)){for(u.trackId=e.data[0].pid,l=0;l<e.data.length;l++)n=e.data[l],o.set(n.data,c),c+=n.data.byteLength;a=u,s=(r=o)[0]<<16|r[1]<<8|r[2],a.data=new Uint8Array,1==s&&(a.packetLength=6+(r[4]<<8|r[5]),a.dataAlignmentIndicator=0!=(4&r[6]),192&(s=r[7])&&(a.pts=(14&r[9])<<27|(255&r[10])<<20|(254&r[11])<<12|(255&r[12])<<5|(254&r[13])>>>3,a.pts*=4,a.pts+=(6&r[13])>>>1,a.dts=a.pts,64&s&&(a.dts=(14&r[14])<<27|(255&r[15])<<20|(254&r[16])<<12|(255&r[17])<<5|(254&r[18])>>>3,a.dts*=4,a.dts+=(6&r[18])>>>1)),a.data=r.subarray(9+r[8])),t="video"===t||u.packetLength<=e.size,(i||t)&&(e.size=0,e.data.length=0),t&&d.trigger("data",u)}}var t,d=this,r=!1,a={data:[],size:0},s={data:[],size:0},o={data:[],size:0};Ke.prototype.init.call(this),this.push=function(i){({pat:function(){},pes:function(){var e,t;switch(i.streamType){case je.H264_STREAM_TYPE:e=a,t="video";break;case je.ADTS_STREAM_TYPE:e=s,t="audio";break;case je.METADATA_STREAM_TYPE:e=o,t="timed-metadata";break;default:return}i.payloadUnitStartIndicator&&n(e,t,!0),e.data.push(i),e.size+=i.data.byteLength},pmt:function(){var e={type:"metadata",tracks:[]};null!==(t=i.programMapTable).video&&e.tracks.push({timelineStartInfo:{baseMediaDecodeTime:0},id:+t.video,codec:"avc",type:"video"}),null!==t.audio&&e.tracks.push({timelineStartInfo:{baseMediaDecodeTime:0},id:+t.audio,codec:"adts",type:"audio"}),r=!0,d.trigger("data",e)}})[i.type]()},this.reset=function(){a.size=0,a.data.length=0,s.size=0,s.data.length=0,this.trigger("reset")},this.flushStreams_=function(){n(a,"video"),n(s,"audio"),n(o,"timed-metadata")},this.flush=function(){var e;!r&&t&&(e={type:"metadata",tracks:[]},null!==t.video&&e.tracks.push({timelineStartInfo:{baseMediaDecodeTime:0},id:+t.video,codec:"avc",type:"video"}),null!==t.audio&&e.tracks.push({timelineStartInfo:{baseMediaDecodeTime:0},id:+t.audio,codec:"adts",type:"audio"}),d.trigger("data",e)),r=!1,this.flushStreams_(),this.trigger("done")}}).prototype=new j;var Qe,$e={PAT_PID:0,MP2T_PACKET_LENGTH:188,TransportPacketStream:Ye,TransportParseStream:Xe,ElementaryStream:Ke,TimestampRolloverStream:We,CaptionStream:Fe.CaptionStream,Cea608Stream:Fe.Cea608Stream,Cea708Stream:Fe.Cea708Stream,MetadataStream:e};for(Qe in je)je.hasOwnProperty(Qe)&&($e[Qe]=je[Qe]);var Je=$e,Ze=ue,et=[96e3,88200,64e3,48e3,44100,32e3,24e3,22050,16e3,12e3,11025,8e3,7350],tt=function(u){var l,c=0;tt.prototype.init.call(this),this.skipWarn_=function(e,t){this.trigger("log",{level:"warn",message:"adts skiping bytes "+e+" to "+t+" in frame "+c+" outside syncword"})},this.push=function(e){var t,i,n,r,a,s,o=0;if(u||(c=0),"audio"===e.type){for(l&&l.length?(n=l,(l=new Uint8Array(n.byteLength+e.data.byteLength)).set(n),l.set(e.data,n.byteLength)):l=e.data;o+7<l.length;)if(255===l[o]&&240==(246&l[o+1])){if("number"==typeof s&&(this.skipWarn_(s,o),s=null),i=2*(1&~l[o+1]),t=(3&l[o+3])<<11|l[o+4]<<3|(224&l[o+5])>>5,a=(r=1024*(1+(3&l[o+6])))*Ze/et[(60&l[o+2])>>>2],l.byteLength-o<t)break;this.trigger("data",{pts:e.pts+c*a,dts:e.dts+c*a,sampleCount:r,audioobjecttype:1+(l[o+2]>>>6&3),channelcount:(1&l[o+2])<<2|(192&l[o+3])>>>6,samplerate:et[(60&l[o+2])>>>2],samplingfrequencyindex:(60&l[o+2])>>>2,samplesize:16,data:l.subarray(o+7+i,o+t)}),c++,o+=t}else"number"!=typeof s&&(s=o),o++;"number"==typeof s&&(this.skipWarn_(s,o),s=null),l=l.subarray(o)}},this.flush=function(){c=0,this.trigger("done")},this.reset=function(){l=void 0,this.trigger("reset")},this.endTimeline=function(){l=void 0,this.trigger("endedtimeline")}};tt.prototype=new j;var it,nt,rt=tt,at=function(n){var r=n.byteLength,a=0,s=0;this.length=function(){return 8*r},this.bitsAvailable=function(){return 8*r+s},this.loadWord=function(){var e=n.byteLength-r,t=new Uint8Array(4),i=Math.min(4,r);if(0===i)throw new Error("no bytes available");t.set(n.subarray(e,e+i)),a=new DataView(t.buffer).getUint32(0),s=8*i,r-=i},this.skipBits=function(e){var t;e<s||(e-=s,e-=8*(t=Math.floor(e/8)),r-=t,this.loadWord()),a<<=e,s-=e},this.readBits=function(e){var t=Math.min(s,e),i=a>>>32-t;return 0<(s-=t)?a<<=t:0<r&&this.loadWord(),0<(t=e-t)?i<<t|this.readBits(t):i},this.skipLeadingZeros=function(){for(var e=0;e<s;++e)if(0!=(a&2147483648>>>e))return a<<=e,s-=e,e;return this.loadWord(),e+this.skipLeadingZeros()},this.skipUnsignedExpGolomb=function(){this.skipBits(1+this.skipLeadingZeros())},this.skipExpGolomb=function(){this.skipBits(1+this.skipLeadingZeros())},this.readUnsignedExpGolomb=function(){var e=this.skipLeadingZeros();return this.readBits(e+1)-1},this.readExpGolomb=function(){var e=this.readUnsignedExpGolomb();return 1&e?1+e>>>1:-1*(e>>>1)},this.readBoolean=function(){return 1===this.readBits(1)},this.readUnsignedByte=function(){return this.readBits(8)},this.loadWord()},st=function(){var n,r,a=0;st.prototype.init.call(this),this.push=function(e){for(var t,i=(r=r?((t=new Uint8Array(r.byteLength+e.data.byteLength)).set(r),t.set(e.data,r.byteLength),t):e.data).byteLength;a<i-3;a++)if(1===r[a+2]){n=a+5;break}for(;n<i;)switch(r[n]){case 0:if(0!==r[n-1]){n+=2;break}if(0!==r[n-2]){n++;break}for(a+3!==n-2&&this.trigger("data",r.subarray(a+3,n-2));1!==r[++n]&&n<i;);a=n-2,n+=3;break;case 1:if(0!==r[n-1]||0!==r[n-2]){n+=3;break}this.trigger("data",r.subarray(a+3,n-2)),a=n-2,n+=3;break;default:n+=3}r=r.subarray(a),n-=a,a=0},this.reset=function(){r=null,a=0,this.trigger("reset")},this.flush=function(){r&&3<r.byteLength&&this.trigger("data",r.subarray(a+3)),r=null,a=0,this.trigger("done")},this.endTimeline=function(){this.flush(),this.trigger("endedtimeline")}};st.prototype=new j,nt={100:!0,110:!0,122:!0,244:!0,44:!0,83:!0,86:!0,118:!0,128:!0,138:!0,139:!0,134:!0},(it=function(){var i,n,r,a,s,o,m,t=new st;it.prototype.init.call(this),(i=this).push=function(e){"video"===e.type&&(n=e.trackId,r=e.pts,a=e.dts,t.push(e))},t.on("data",function(e){var t={trackId:n,pts:r,dts:a,data:e,nalUnitTypeCode:31&e[0]};switch(t.nalUnitTypeCode){case 5:t.nalUnitType="slice_layer_without_partitioning_rbsp_idr";break;case 6:t.nalUnitType="sei_rbsp",t.escapedRBSP=s(e.subarray(1));break;case 7:t.nalUnitType="seq_parameter_set_rbsp",t.escapedRBSP=s(e.subarray(1)),t.config=o(t.escapedRBSP);break;case 8:t.nalUnitType="pic_parameter_set_rbsp";break;case 9:t.nalUnitType="access_unit_delimiter_rbsp"}i.trigger("data",t)}),t.on("done",function(){i.trigger("done")}),t.on("partialdone",function(){i.trigger("partialdone")}),t.on("reset",function(){i.trigger("reset")}),t.on("endedtimeline",function(){i.trigger("endedtimeline")}),this.flush=function(){t.flush()},this.partialFlush=function(){t.partialFlush()},this.reset=function(){t.reset()},this.endTimeline=function(){t.endTimeline()},m=function(e,t){for(var i=8,n=8,r=0;r<e;r++)i=0===(n=0!==n?(i+t.readExpGolomb()+256)%256:n)?i:n},s=function(e){for(var t=e.byteLength,i=[],n=1;n<t-2;)0===e[n]&&0===e[n+1]&&3===e[n+2]?(i.push(n+2),n+=2):n++;if(0===i.length)return e;for(var r=t-i.length,a=new Uint8Array(r),s=0,n=0;n<r;s++,n++)s===i[0]&&(s++,i.shift()),a[n]=e[s];return a},o=function(e){var t,i,n,r,a,s=0,o=0,u=0,l=0,c=[1,1],d=new at(e),h=d.readUnsignedByte(),p=d.readUnsignedByte(),f=d.readUnsignedByte();if(d.skipUnsignedExpGolomb(),nt[h]&&(3===(i=d.readUnsignedExpGolomb())&&d.skipBits(1),d.skipUnsignedExpGolomb(),d.skipUnsignedExpGolomb(),d.skipBits(1),d.readBoolean()))for(r=3!==i?8:12,a=0;a<r;a++)d.readBoolean()&&m(a<6?16:64,d);if(d.skipUnsignedExpGolomb(),0===(n=d.readUnsignedExpGolomb()))d.readUnsignedExpGolomb();else if(1===n)for(d.skipBits(1),d.skipExpGolomb(),d.skipExpGolomb(),t=d.readUnsignedExpGolomb(),a=0;a<t;a++)d.skipExpGolomb();if(d.skipUnsignedExpGolomb(),d.skipBits(1),e=d.readUnsignedExpGolomb(),i=d.readUnsignedExpGolomb(),0===(n=d.readBits(1))&&d.skipBits(1),d.skipBits(1),d.readBoolean()&&(s=d.readUnsignedExpGolomb(),o=d.readUnsignedExpGolomb(),u=d.readUnsignedExpGolomb(),l=d.readUnsignedExpGolomb()),d.readBoolean()&&d.readBoolean()){switch(d.readUnsignedByte()){case 1:c=[1,1];break;case 2:c=[12,11];break;case 3:c=[10,11];break;case 4:c=[16,11];break;case 5:c=[40,33];break;case 6:c=[24,11];break;case 7:c=[20,11];break;case 8:c=[32,11];break;case 9:c=[80,33];break;case 10:c=[18,11];break;case 11:c=[15,11];break;case 12:c=[64,33];break;case 13:c=[160,99];break;case 14:c=[4,3];break;case 15:c=[3,2];break;case 16:c=[2,1];break;case 255:c=[d.readUnsignedByte()<<8|d.readUnsignedByte(),d.readUnsignedByte()<<8|d.readUnsignedByte()]}c&&(c[0],c[1])}return{profileIdc:h,levelIdc:f,profileCompatibility:p,width:16*(e+1)-2*s-2*o,height:(2-n)*(i+1)*16-2*u-2*l,sarRatio:c}}}).prototype=new j;function ot(e,t){var i=0<=(i=e[t+6]<<21|e[t+7]<<14|e[t+8]<<7|e[t+9])?i:0;return(16&e[t+5])>>4?i+20:i+10}function ut(e,t){return e.length-t<10||e[t]!=="I".charCodeAt(0)||e[t+1]!=="D".charCodeAt(0)||e[t+2]!=="3".charCodeAt(0)?t:ut(e,t+=ot(e,t))}function lt(e){return e[0]<<21|e[1]<<14|e[2]<<7|e[3]}var e={H264Stream:it,NalByteStream:st},ct=[96e3,88200,64e3,48e3,44100,32e3,24e3,22050,16e3,12e3,11025,8e3,7350],dt={isLikelyAacData:function(e){var t=ut(e,0);return e.length>=t+2&&255==(255&e[t])&&240==(240&e[t+1])&&16==(22&e[t+1])},parseId3TagSize:ot,parseAdtsSize:function(e,t){var i=(224&e[t+5])>>5,n=e[t+4]<<3;return 6144&e[t+3]|n|i},parseType:function(e,t){return e[t]==="I".charCodeAt(0)&&e[t+1]==="D".charCodeAt(0)&&e[t+2]==="3".charCodeAt(0)?"timed-metadata":!0&e[t]&&240==(240&e[t+1])?"audio":null},parseSampleRate:function(e){for(var t=0;t+5<e.length;){if(255===e[t]&&240==(246&e[t+1]))return ct[(60&e[t+2])>>>2];t++}return null},parseAacTimestamp:function(e){var t,i=10;64&e[5]&&(i+=4,i+=lt(e.subarray(10,14)));do{if((t=lt(e.subarray(i+4,i+8)))<1)return null;if("PRIV"===String.fromCharCode(e[i],e[i+1],e[i+2],e[i+3]))for(var n=e.subarray(i+10,i+t+10),r=0;r<n.byteLength;r++)if(0===n[r]){if("com.apple.streaming.transportStreamTimestamp"!==unescape(function(e,t,i){for(var n="",r=t;r<i;r++)n+="%"+("00"+e[r].toString(16)).slice(-2);return n}(n,0,r)))break;var a=n.subarray(r+1),s=(1&a[3])<<30|a[4]<<22|a[5]<<14|a[6]<<6|a[7]>>>2;return s*=4,s+=3&a[7]}}while(i+=10,(i+=t)<e.byteLength);return null}},ht=function(){var a=new Uint8Array,s=0;ht.prototype.init.call(this),this.setTimestamp=function(e){s=e},this.push=function(e){var t,i,n=0,r=0;for(a.length?(i=a.length,(a=new Uint8Array(e.byteLength+i)).set(a.subarray(0,i)),a.set(e,i)):a=e;3<=a.length-r;)if(a[r]!=="I".charCodeAt(0)||a[r+1]!=="D".charCodeAt(0)||a[r+2]!=="3".charCodeAt(0))if(255!=(255&a[r])||240!=(240&a[r+1]))r++;else{if(a.length-r<7)break;if(r+(n=dt.parseAdtsSize(a,r))>a.length)break;t={type:"audio",data:a.subarray(r,r+n),pts:s,dts:s},this.trigger("data",t),r+=n}else{if(a.length-r<10)break;if(r+(n=dt.parseId3TagSize(a,r))>a.length)break;t={type:"timed-metadata",data:a.subarray(r,r+n)},this.trigger("data",t),r+=n}e=a.length-r,a=0<e?a.subarray(r):new Uint8Array},this.reset=function(){a=new Uint8Array,this.trigger("reset")},this.endTimeline=function(){a=new Uint8Array,this.trigger("endedtimeline")}};ht.prototype=new j;function pt(e,t){t.stream=e,this.trigger("log",t)}function ft(e,t){for(var i=Object.keys(t),n=0;n<i.length;n++){var r=i[n];"headOfPipeline"!==r&&t[r].on&&t[r].on("log",pt.bind(e,r))}}function mt(e,t){var i;if(e.length===t.length){for(i=0;i<e.length;i++)if(e[i]!==t[i])return;return 1}}function gt(e,t,i,n,r,a){return{start:{dts:e,pts:e+(i-t)},end:{dts:e+(n-t),pts:e+(r-i)},prependedContentDuration:a,baseMediaDecodeTime:e}}var yt,vt,_t,bt=ht,Tt=["audioobjecttype","channelcount","samplerate","samplingfrequencyindex","samplesize"],St=["width","height","profileIdc","levelIdc","profileCompatibility","sarRatio"],wt=e.H264Stream,Et=dt.isLikelyAacData,kt=ue,Ct=function(a,s){var o=[],u=0,l=0,c=1/0,d=(s=s||{}).firstSequenceNumber||0;Ct.prototype.init.call(this),this.push=function(t){Te(a,t),a&&Tt.forEach(function(e){a[e]=t[e]}),o.push(t)},this.setEarliestDts=function(e){u=e},this.setVideoBaseMediaDecodeTime=function(e){c=e},this.setAudioAppendStart=function(e){l=e},this.flush=function(){var e,t,i,n,r;0!==o.length&&(e=me(o,a,u),a.baseMediaDecodeTime=be(a,s.keepOriginalTimestamps),r=fe(a,e,l,c),a.samples=ge(e),t=K(ye(e)),o=[],n=Y(d,[a]),i=new Uint8Array(n.byteLength+t.byteLength),d++,i.set(n),i.set(t,n.byteLength),_e(a),n=Math.ceil(1024*kt/a.samplerate),e.length&&(n=e.length*n,this.trigger("segmentTimingInfo",gt(de(a.baseMediaDecodeTime,a.samplerate),e[0].dts,e[0].pts,e[0].dts+n,e[0].pts+n,r||0)),this.trigger("timingInfo",{start:e[0].pts,end:e[0].pts+n})),this.trigger("data",{track:a,boxes:i})),this.trigger("done","AudioSegmentStream")},this.reset=function(){_e(a),o=[],this.trigger("reset")}};Ct.prototype=new j,(yt=function(s,a){var t,i,o=[],l=[],u=(a=a||{}).firstSequenceNumber||0;yt.prototype.init.call(this),delete s.minPTS,this.gopCache_=[],this.push=function(e){Te(s,e),"seq_parameter_set_rbsp"!==e.nalUnitType||t||(t=e.config,s.sps=[e.data],St.forEach(function(e){s[e]=t[e]},this)),"pic_parameter_set_rbsp"!==e.nalUnitType||i||(i=e.data,s.pps=[e.data]),o.push(e)},this.flush=function(){for(var e,t,i,n=0;o.length&&"access_unit_delimiter_rbsp"!==o[0].nalUnitType;)o.shift();if(0===o.length)return this.resetStream_(),void this.trigger("done","VideoSegmentStream");if(e=$(o),(t=J(e))[0][0].keyFrame||((i=this.getGopForFusion_(o[0],s))?(n=i.duration,t.unshift(i),t.byteLength+=i.byteLength,t.nalCount+=i.nalCount,t.pts=i.pts,t.dts=i.dts,t.duration+=i.duration):t=Z(t)),l.length){var r=a.alignGopsAtEnd?this.alignGopsAtEnd_(t):this.alignGopsAtStart_(t);if(!r)return this.gopCache_.unshift({gop:t.pop(),pps:s.pps,sps:s.sps}),this.gopCache_.length=Math.min(6,this.gopCache_.length),o=[],this.resetStream_(),void this.trigger("done","VideoSegmentStream");_e(s),t=r}Te(s,t),s.samples=ee(t),e=K(te(t)),s.baseMediaDecodeTime=be(s,a.keepOriginalTimestamps),this.trigger("processedGopsInfo",t.map(function(e){return{pts:e.pts,dts:e.dts,byteLength:e.byteLength}})),i=t[0],r=t[t.length-1],this.trigger("segmentTimingInfo",gt(s.baseMediaDecodeTime,i.dts,i.pts,r.dts+r.duration,r.pts+r.duration,n)),this.trigger("timingInfo",{start:t[0].pts,end:t[t.length-1].pts+t[t.length-1].duration}),this.gopCache_.unshift({gop:t.pop(),pps:s.pps,sps:s.sps}),this.gopCache_.length=Math.min(6,this.gopCache_.length),o=[],this.trigger("baseMediaDecodeTime",s.baseMediaDecodeTime),this.trigger("timelineStartInfo",s.timelineStartInfo),n=Y(u,[s]),t=new Uint8Array(n.byteLength+e.byteLength),u++,t.set(n),t.set(e,n.byteLength),this.trigger("data",{track:s,boxes:t}),this.resetStream_(),this.trigger("done","VideoSegmentStream")},this.reset=function(){this.resetStream_(),o=[],this.gopCache_.length=0,l.length=0,this.trigger("reset")},this.resetStream_=function(){_e(s),i=t=void 0},this.getGopForFusion_=function(e){for(var t,i,n,r=1/0,a=0;a<this.gopCache_.length;a++)i=(n=this.gopCache_[a]).gop,s.pps&&mt(s.pps[0],n.pps[0])&&s.sps&&mt(s.sps[0],n.sps[0])&&(i.dts<s.timelineStartInfo.dts||-1e4<=(i=e.dts-i.dts-i.duration)&&i<=45e3&&(!t||i<r)&&(t=n,r=i));return t?t.gop:null},this.alignGopsAtStart_=function(e){for(var t,i,n,r,a=e.byteLength,s=e.nalCount,o=e.duration,u=t=0;u<l.length&&t<e.length&&(i=l[u],n=e[t],i.pts!==n.pts);)n.pts>i.pts?u++:(t++,a-=n.byteLength,s-=n.nalCount,o-=n.duration);return 0===t?e:t===e.length?null:((r=e.slice(t)).byteLength=a,r.duration=o,r.nalCount=s,r.pts=r[0].pts,r.dts=r[0].dts,r)},this.alignGopsAtEnd_=function(e){for(var t,i,n=l.length-1,r=e.length-1,a=null,s=!1;0<=n&&0<=r;){if(t=l[n],i=e[r],t.pts===i.pts){s=!0;break}t.pts>i.pts?n--:(n===l.length-1&&(a=r),r--)}if(!s&&null===a)return null;if(0===(u=s?r:a))return e;var o=e.slice(u),u=o.reduce(function(e,t){return e.byteLength+=t.byteLength,e.duration+=t.duration,e.nalCount+=t.nalCount,e},{byteLength:0,duration:0,nalCount:0});return o.byteLength=u.byteLength,o.duration=u.duration,o.nalCount=u.nalCount,o.pts=o[0].pts,o.dts=o[0].dts,o},this.alignGopsWith=function(e){l=e}}).prototype=new j,(_t=function(e,t){this.numberOfTracks=0,this.metadataStream=t,"undefined"!=typeof(e=e||{}).remux?this.remuxTracks=!!e.remux:this.remuxTracks=!0,"boolean"==typeof e.keepOriginalTimestamps?this.keepOriginalTimestamps=e.keepOriginalTimestamps:this.keepOriginalTimestamps=!1,this.pendingTracks=[],this.videoTrack=null,this.pendingBoxes=[],this.pendingCaptions=[],this.pendingMetadata=[],this.pendingBytes=0,this.emittedTracks=0,_t.prototype.init.call(this),this.push=function(e){return e.text?this.pendingCaptions.push(e):e.frames?this.pendingMetadata.push(e):(this.pendingTracks.push(e.track),this.pendingBytes+=e.boxes.byteLength,"video"===e.track.type&&(this.videoTrack=e.track,this.pendingBoxes.push(e.boxes)),void("audio"===e.track.type&&(this.audioTrack=e.track,this.pendingBoxes.unshift(e.boxes))))}}).prototype=new j,_t.prototype.flush=function(e){var t,i,n,r=0,a={captions:[],captionStreams:{},metadata:[],info:{}},s=0;if(this.pendingTracks.length<this.numberOfTracks){if("VideoSegmentStream"!==e&&"AudioSegmentStream"!==e)return;if(this.remuxTracks)return;if(0===this.pendingTracks.length)return this.emittedTracks++,void(this.emittedTracks>=this.numberOfTracks&&(this.trigger("done"),this.emittedTracks=0))}if(this.videoTrack?(s=this.videoTrack.timelineStartInfo.pts,St.forEach(function(e){a.info[e]=this.videoTrack[e]},this)):this.audioTrack&&(s=this.audioTrack.timelineStartInfo.pts,Tt.forEach(function(e){a.info[e]=this.audioTrack[e]},this)),this.videoTrack||this.audioTrack){for(1===this.pendingTracks.length?a.type=this.pendingTracks[0].type:a.type="combined",this.emittedTracks+=this.pendingTracks.length,e=Q(this.pendingTracks),a.initSegment=new Uint8Array(e.byteLength),a.initSegment.set(e),a.data=new Uint8Array(this.pendingBytes),n=0;n<this.pendingBoxes.length;n++)a.data.set(this.pendingBoxes[n],r),r+=this.pendingBoxes[n].byteLength;for(n=0;n<this.pendingCaptions.length;n++)(t=this.pendingCaptions[n]).startTime=pe(t.startPts,s,this.keepOriginalTimestamps),t.endTime=pe(t.endPts,s,this.keepOriginalTimestamps),a.captionStreams[t.stream]=!0,a.captions.push(t);for(n=0;n<this.pendingMetadata.length;n++)(i=this.pendingMetadata[n]).cueTime=pe(i.pts,s,this.keepOriginalTimestamps),a.metadata.push(i);for(a.metadata.dispatchType=this.metadataStream.dispatchType,this.pendingTracks.length=0,this.videoTrack=null,this.pendingBoxes.length=0,this.pendingCaptions.length=0,this.pendingBytes=0,this.pendingMetadata.length=0,this.trigger("data",a),n=0;n<a.captions.length;n++)t=a.captions[n],this.trigger("caption",t);for(n=0;n<a.metadata.length;n++)i=a.metadata[n],this.trigger("id3Frame",i)}this.emittedTracks>=this.numberOfTracks&&(this.trigger("done"),this.emittedTracks=0)},_t.prototype.setRemux=function(e){this.remuxTracks=e},(vt=function(n){var r,a,s=this,i=!0;vt.prototype.init.call(this),this.baseMediaDecodeTime=(n=n||{}).baseMediaDecodeTime||0,this.transmuxPipeline_={},this.setupAacPipeline=function(){var t={};(this.transmuxPipeline_=t).type="aac",t.metadataStream=new Je.MetadataStream,t.aacStream=new bt,t.audioTimestampRolloverStream=new Je.TimestampRolloverStream("audio"),t.timedMetadataTimestampRolloverStream=new Je.TimestampRolloverStream("timed-metadata"),t.adtsStream=new rt,t.coalesceStream=new _t(n,t.metadataStream),t.headOfPipeline=t.aacStream,t.aacStream.pipe(t.audioTimestampRolloverStream).pipe(t.adtsStream),t.aacStream.pipe(t.timedMetadataTimestampRolloverStream).pipe(t.metadataStream).pipe(t.coalesceStream),t.metadataStream.on("timestamp",function(e){t.aacStream.setTimestamp(e.timeStamp)}),t.aacStream.on("data",function(e){"timed-metadata"!==e.type&&"audio"!==e.type||t.audioSegmentStream||(a=a||{timelineStartInfo:{baseMediaDecodeTime:s.baseMediaDecodeTime},codec:"adts",type:"audio"},t.coalesceStream.numberOfTracks++,t.audioSegmentStream=new Ct(a,n),t.audioSegmentStream.on("log",s.getLogTrigger_("audioSegmentStream")),t.audioSegmentStream.on("timingInfo",s.trigger.bind(s,"audioTimingInfo")),t.adtsStream.pipe(t.audioSegmentStream).pipe(t.coalesceStream),s.trigger("trackinfo",{hasAudio:!!a,hasVideo:!!r}))}),t.coalesceStream.on("data",this.trigger.bind(this,"data")),t.coalesceStream.on("done",this.trigger.bind(this,"done")),ft(this,t)},this.setupTsPipeline=function(){var i={};(this.transmuxPipeline_=i).type="ts",i.metadataStream=new Je.MetadataStream,i.packetStream=new Je.TransportPacketStream,i.parseStream=new Je.TransportParseStream,i.elementaryStream=new Je.ElementaryStream,i.timestampRolloverStream=new Je.TimestampRolloverStream,i.adtsStream=new rt,i.h264Stream=new wt,i.captionStream=new Je.CaptionStream(n),i.coalesceStream=new _t(n,i.metadataStream),i.headOfPipeline=i.packetStream,i.packetStream.pipe(i.parseStream).pipe(i.elementaryStream).pipe(i.timestampRolloverStream),i.timestampRolloverStream.pipe(i.h264Stream),i.timestampRolloverStream.pipe(i.adtsStream),i.timestampRolloverStream.pipe(i.metadataStream).pipe(i.coalesceStream),i.h264Stream.pipe(i.captionStream).pipe(i.coalesceStream),i.elementaryStream.on("data",function(e){var t;if("metadata"===e.type){for(t=e.tracks.length;t--;)r||"video"!==e.tracks[t].type?a||"audio"!==e.tracks[t].type||((a=e.tracks[t]).timelineStartInfo.baseMediaDecodeTime=s.baseMediaDecodeTime):(r=e.tracks[t]).timelineStartInfo.baseMediaDecodeTime=s.baseMediaDecodeTime;r&&!i.videoSegmentStream&&(i.coalesceStream.numberOfTracks++,i.videoSegmentStream=new yt(r,n),i.videoSegmentStream.on("log",s.getLogTrigger_("videoSegmentStream")),i.videoSegmentStream.on("timelineStartInfo",function(e){a&&!n.keepOriginalTimestamps&&(a.timelineStartInfo=e,i.audioSegmentStream.setEarliestDts(e.dts-s.baseMediaDecodeTime))}),i.videoSegmentStream.on("processedGopsInfo",s.trigger.bind(s,"gopInfo")),i.videoSegmentStream.on("segmentTimingInfo",s.trigger.bind(s,"videoSegmentTimingInfo")),i.videoSegmentStream.on("baseMediaDecodeTime",function(e){a&&i.audioSegmentStream.setVideoBaseMediaDecodeTime(e)}),i.videoSegmentStream.on("timingInfo",s.trigger.bind(s,"videoTimingInfo")),i.h264Stream.pipe(i.videoSegmentStream).pipe(i.coalesceStream)),a&&!i.audioSegmentStream&&(i.coalesceStream.numberOfTracks++,i.audioSegmentStream=new Ct(a,n),i.audioSegmentStream.on("log",s.getLogTrigger_("audioSegmentStream")),i.audioSegmentStream.on("timingInfo",s.trigger.bind(s,"audioTimingInfo")),i.audioSegmentStream.on("segmentTimingInfo",s.trigger.bind(s,"audioSegmentTimingInfo")),i.adtsStream.pipe(i.audioSegmentStream).pipe(i.coalesceStream)),s.trigger("trackinfo",{hasAudio:!!a,hasVideo:!!r})}}),i.coalesceStream.on("data",this.trigger.bind(this,"data")),i.coalesceStream.on("id3Frame",function(e){e.dispatchType=i.metadataStream.dispatchType,s.trigger("id3Frame",e)}),i.coalesceStream.on("caption",this.trigger.bind(this,"caption")),i.coalesceStream.on("done",this.trigger.bind(this,"done")),ft(this,i)},this.setBaseMediaDecodeTime=function(e){var t=this.transmuxPipeline_;n.keepOriginalTimestamps||(this.baseMediaDecodeTime=e),a&&(a.timelineStartInfo.dts=void 0,a.timelineStartInfo.pts=void 0,_e(a),t.audioTimestampRolloverStream&&t.audioTimestampRolloverStream.discontinuity()),r&&(t.videoSegmentStream&&(t.videoSegmentStream.gopCache_=[]),r.timelineStartInfo.dts=void 0,r.timelineStartInfo.pts=void 0,_e(r),t.captionStream.reset()),t.timestampRolloverStream&&t.timestampRolloverStream.discontinuity()},this.setAudioAppendStart=function(e){a&&this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(e)},this.setRemux=function(e){var t=this.transmuxPipeline_;n.remux=e,t&&t.coalesceStream&&t.coalesceStream.setRemux(e)},this.alignGopsWith=function(e){r&&this.transmuxPipeline_.videoSegmentStream&&this.transmuxPipeline_.videoSegmentStream.alignGopsWith(e)},this.getLogTrigger_=function(t){var i=this;return function(e){e.stream=t,i.trigger("log",e)}},this.push=function(e){var t;i&&((t=Et(e))&&"aac"!==this.transmuxPipeline_.type?this.setupAacPipeline():t||"ts"===this.transmuxPipeline_.type||this.setupTsPipeline(),i=!1),this.transmuxPipeline_.headOfPipeline.push(e)},this.flush=function(){i=!0,this.transmuxPipeline_.headOfPipeline.flush()},this.endTimeline=function(){this.transmuxPipeline_.headOfPipeline.endTimeline()},this.reset=function(){this.transmuxPipeline_.headOfPipeline&&this.transmuxPipeline_.headOfPipeline.reset()},this.resetCaptions=function(){this.transmuxPipeline_.captionStream&&this.transmuxPipeline_.captionStream.reset()}}).prototype=new j;function It(e,c){var i=Mt(e,["moof","traf"]),e=Mt(e,["mdat"]),d={},n=[];return e.forEach(function(e,t){t=i[t];n.push({mdat:e,traf:t})}),n.forEach(function(e){var t,i,n,r,a,s=e.mdat,o=e.traf,u=Mt(o,["tfhd"]),l=Ht(u[0]),e=l.trackId,u=Mt(o,["tfdt"]),u=0<u.length?Bt(u[0]).baseMediaDecodeTime:0,o=Mt(o,["trun"]);c===e&&0<o.length&&(o=o,t=u,i=(l=l).defaultSampleDuration||0,n=l.defaultSampleSize||0,r=l.trackId,a=[],o.forEach(function(e){e=jt(e).samples;e.forEach(function(e){void 0===e.duration&&(e.duration=i),void 0===e.size&&(e.size=n),e.trackId=r,e.dts=t,void 0===e.compositionTimeOffset&&(e.compositionTimeOffset=0),"bigint"==typeof t?(e.pts=t+qt.BigInt(e.compositionTimeOffset),t+=qt.BigInt(e.duration)):(e.pts=t+e.compositionTimeOffset,t+=e.duration)}),a=a.concat(e)}),s=function(e,t,i){for(var n,r,a=new DataView(e.buffer,e.byteOffset,e.byteLength),s={logs:[],seiNals:[]},o=0;o+4<e.length;o+=n)if(n=a.getUint32(o),o+=4,!(n<=0))switch(31&e[o]){case 6:var u=e.subarray(o+1,o+1+n),l=function(e,t){for(var i=e,n=0;n<t.length;n++){var r=t[n];if(i<r.size)return r;i-=r.size}return null}(o,t),u={nalUnitType:"sei_rbsp",size:n,data:u,escapedRBSP:Vt(u),trackId:i};if(l)u.pts=l.pts,u.dts=l.dts,r=l;else{if(!r){s.logs.push({level:"warn",message:"We've encountered a nal unit without data at "+o+" for trackId "+i+". See mux.js#223."});break}u.pts=r.pts,u.dts=r.dts}s.seiNals.push(u)}return s}(s,a,e),d[e]||(d[e]={seiNals:[],logs:[]}),d[e].seiNals=d[e].seiNals.concat(s.seiNals),d[e].logs=d[e].logs.concat(s.logs))}),d}function xt(e){var t=31&e[1];return t<<=8,t|=e[2]}function At(e){return!!(64&e[1])}function Pt(e){var t=0;return 1<(48&e[3])>>>4&&(t+=e[4]+1),t}function Lt(e){switch(e){case 5:return"slice_layer_without_partitioning_rbsp_idr";case 6:return"sei_rbsp";case 7:return"seq_parameter_set_rbsp";case 8:return"pic_parameter_set_rbsp";case 9:return"access_unit_delimiter_rbsp";default:return null}}var Dt={Transmuxer:vt,VideoSegmentStream:yt,AudioSegmentStream:Ct,AUDIO_PROPERTIES:Tt,VIDEO_PROPERTIES:St,generateSegmentTimingInfo:gt},e=function(e){return e>>>0},Ot=function(e){var t="";return t+=String.fromCharCode(e[0]),t+=String.fromCharCode(e[1]),t+=String.fromCharCode(e[2]),t+=String.fromCharCode(e[3])},Rt=e,Mt=function e(t,i){var n,r,a,s=[];if(!i.length)return null;for(n=0;n<t.byteLength;)r=Rt(t[n]<<24|t[n+1]<<16|t[n+2]<<8|t[n+3]),a=Ot(t.subarray(n+4,n+8)),r=1<r?n+r:t.byteLength,a===i[0]&&(1===i.length?s.push(t.subarray(n+8,r)):(a=e(t.subarray(n+8,r),i.slice(1))).length&&(s=s.concat(a))),n=r;return s},Nt=e,Ut=q.getUint64,Bt=function(e){var t={version:e[0],flags:new Uint8Array(e.subarray(1,4))};return 1===t.version?t.baseMediaDecodeTime=Ut(e.subarray(4)):t.baseMediaDecodeTime=Nt(e[4]<<24|e[5]<<16|e[6]<<8|e[7]),t},Ft=function(e){return{isLeading:(12&e[0])>>>2,dependsOn:3&e[0],isDependedOn:(192&e[1])>>>6,hasRedundancy:(48&e[1])>>>4,paddingValue:(14&e[1])>>>1,isNonSyncSample:1&e[1],degradationPriority:e[2]<<8|e[3]}},jt=function(e){var t,i={version:e[0],flags:new Uint8Array(e.subarray(1,4)),samples:[]},n=new DataView(e.buffer,e.byteOffset,e.byteLength),r=1&i.flags[2],a=4&i.flags[2],s=1&i.flags[1],o=2&i.flags[1],u=4&i.flags[1],l=8&i.flags[1],c=n.getUint32(4),d=8;for(r&&(i.dataOffset=n.getInt32(d),d+=4),a&&c&&(t={flags:Ft(e.subarray(d,d+4))},d+=4,s&&(t.duration=n.getUint32(d),d+=4),o&&(t.size=n.getUint32(d),d+=4),l&&(1===i.version?t.compositionTimeOffset=n.getInt32(d):t.compositionTimeOffset=n.getUint32(d),d+=4),i.samples.push(t),c--);c--;)t={},s&&(t.duration=n.getUint32(d),d+=4),o&&(t.size=n.getUint32(d),d+=4),u&&(t.flags=Ft(e.subarray(d,d+4)),d+=4),l&&(1===i.version?t.compositionTimeOffset=n.getInt32(d):t.compositionTimeOffset=n.getUint32(d),d+=4),i.samples.push(t);return i},Ht=function(e){var t=new DataView(e.buffer,e.byteOffset,e.byteLength),i={version:e[0],flags:new Uint8Array(e.subarray(1,4)),trackId:t.getUint32(4)},n=1&i.flags[2],r=2&i.flags[2],a=8&i.flags[2],s=16&i.flags[2],o=32&i.flags[2],u=65536&i.flags[0],l=131072&i.flags[0],e=8;return 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i=n.call(this)||this;if(!e)throw new TypeError("Initialization settings are required");if("function"!=typeof e.currentTime)throw new TypeError("No currentTime getter specified");if(!e.mediaSource)throw new TypeError("No MediaSource specified");return i.bandwidth=e.bandwidth,i.throughput={rate:0,count:0},i.roundTrip=NaN,i.resetStats_(),i.mediaIndex=null,i.partIndex=null,i.hasPlayed_=e.hasPlayed,i.currentTime_=e.currentTime,i.seekable_=e.seekable,i.seeking_=e.seeking,i.duration_=e.duration,i.mediaSource_=e.mediaSource,i.vhs_=e.vhs,i.loaderType_=e.loaderType,i.currentMediaInfo_=void 0,i.startingMediaInfo_=void 0,i.segmentMetadataTrack_=e.segmentMetadataTrack,i.goalBufferLength_=e.goalBufferLength,i.sourceType_=e.sourceType,i.sourceUpdater_=e.sourceUpdater,i.inbandTextTracks_=e.inbandTextTracks,i.state_="INIT",i.timelineChangeController_=e.timelineChangeController,i.shouldSaveSegmentTimingInfo_=!0,i.parse708captions_=e.parse708captions,i.captionServices_=e.captionServices,i.experimentalExactManifestTimings=e.experimentalExactManifestTimings,i.checkBufferTimeout_=null,i.error_=void 0,i.currentTimeline_=-1,i.pendingSegment_=null,i.xhrOptions_=null,i.pendingSegments_=[],i.audioDisabled_=!1,i.isPendingTimestampOffset_=!1,i.gopBuffer_=[],i.timeMapping_=0,i.safeAppend_=11<=tr.browser.IE_VERSION,i.appendInitSegment_={audio:!0,video:!0},i.playlistOfLastInitSegment_={audio:null,video:null},i.callQueue_=[],i.loadQueue_=[],i.metadataQueue_={id3:[],caption:[]},i.waitingOnRemove_=!1,i.quotaExceededErrorRetryTimeout_=null,i.activeInitSegmentId_=null,i.initSegments_={},i.cacheEncryptionKeys_=e.cacheEncryptionKeys,i.keyCache_={},i.decrypter_=e.decrypter,i.syncController_=e.syncController,i.syncPoint_={segmentIndex:0,time:0},i.transmuxer_=i.createTransmuxer_(),i.triggerSyncInfoUpdate_=function(){return i.trigger("syncinfoupdate")},i.syncController_.on("syncinfoupdate",i.triggerSyncInfoUpdate_),i.mediaSource_.addEventListener("sourceopen",function(){i.isEndOfStream_()||(i.ended_=!1)}),i.fetchAtBuffer_=!1,i.logger_=Oo("SegmentLoader["+i.loaderType_+"]"),Object.defineProperty(ft(i),"state",{get:function(){return this.state_},set:function(e){e!==this.state_&&(this.logger_(this.state_+" -> "+e),this.state_=e,this.trigger("statechange"))}}),i.sourceUpdater_.on("ready",function(){i.hasEnoughInfoToAppend_()&&i.processCallQueue_()}),"main"===i.loaderType_&&i.timelineChangeController_.on("pendingtimelinechange",function(){i.hasEnoughInfoToAppend_()&&i.processCallQueue_()}),"audio"===i.loaderType_&&i.timelineChangeController_.on("timelinechange",function(){i.hasEnoughInfoToLoad_()&&i.processLoadQueue_(),i.hasEnoughInfoToAppend_()&&i.processCallQueue_()}),i}mt(e,n);var t=e.prototype;return t.createTransmuxer_=function(){return Cl({remux:!1,alignGopsAtEnd:this.safeAppend_,keepOriginalTimestamps:!0,parse708captions:this.parse708captions_,captionServices:this.captionServices_})},t.resetStats_=function(){this.mediaBytesTransferred=0,this.mediaRequests=0,this.mediaRequestsAborted=0,this.mediaRequestsTimedout=0,this.mediaRequestsErrored=0,this.mediaTransferDuration=0,this.mediaSecondsLoaded=0,this.mediaAppends=0},t.dispose=function(){this.trigger("dispose"),this.state="DISPOSED",this.pause(),this.abort_(),this.transmuxer_&&this.transmuxer_.terminate(),this.resetStats_(),this.checkBufferTimeout_&&window.clearTimeout(this.checkBufferTimeout_),this.syncController_&&this.triggerSyncInfoUpdate_&&this.syncController_.off("syncinfoupdate",this.triggerSyncInfoUpdate_),this.off()},t.setAudio=function(e){this.audioDisabled_=!e,e?this.appendInitSegment_.audio=!0:this.sourceUpdater_.removeAudio(0,this.duration_())},t.abort=function(){"WAITING"===this.state?(this.abort_(),this.state="READY",this.paused()||this.monitorBuffer_()):this.pendingSegment_&&(this.pendingSegment_=null)},t.abort_=function(){this.pendingSegment_&&this.pendingSegment_.abortRequests&&this.pendingSegment_.abortRequests(),this.pendingSegment_=null,this.callQueue_=[],this.loadQueue_=[],this.metadataQueue_.id3=[],this.metadataQueue_.caption=[],this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_),this.waitingOnRemove_=!1,window.clearTimeout(this.quotaExceededErrorRetryTimeout_),this.quotaExceededErrorRetryTimeout_=null},t.checkForAbort_=function(e){return"APPENDING"!==this.state||this.pendingSegment_?!this.pendingSegment_||this.pendingSegment_.requestId!==e:(this.state="READY",!0)},t.error=function(e){return"undefined"!=typeof e&&(this.logger_("error occurred:",e),this.error_=e),this.pendingSegment_=null,this.error_},t.endOfStream=function(){this.ended_=!0,this.transmuxer_&&kl(this.transmuxer_),this.gopBuffer_.length=0,this.pause(),this.trigger("ended")},t.buffered_=function(){var e=this.getMediaInfo_();if(!this.sourceUpdater_||!e)return tr.createTimeRanges();if("main"===this.loaderType_){var t=e.hasAudio,i=e.hasVideo,e=e.isMuxed;if(i&&t&&!this.audioDisabled_&&!e)return this.sourceUpdater_.buffered();if(i)return this.sourceUpdater_.videoBuffered()}return this.sourceUpdater_.audioBuffered()},t.initSegmentForMap=function(e,t){if(void 0===t&&(t=!1),!e)return null;var i=bu(e),n=this.initSegments_[i];return t&&!n&&e.bytes&&(this.initSegments_[i]=n={resolvedUri:e.resolvedUri,byterange:e.byterange,bytes:e.bytes,tracks:e.tracks,timescales:e.timescales}),n||e},t.segmentKey=function(e,t){if(void 0===t&&(t=!1),!e)return null;var i=Tu(e),n=this.keyCache_[i];this.cacheEncryptionKeys_&&t&&!n&&e.bytes&&(this.keyCache_[i]=n={resolvedUri:e.resolvedUri,bytes:e.bytes});e={resolvedUri:(n||e).resolvedUri};return n&&(e.bytes=n.bytes),e},t.couldBeginLoading_=function(){return this.playlist_&&!this.paused()},t.load=function(){if(this.monitorBuffer_(),this.playlist_)return"INIT"===this.state&&this.couldBeginLoading_()?this.init_():void(!this.couldBeginLoading_()||"READY"!==this.state&&"INIT"!==this.state||(this.state="READY"))},t.init_=function(){return this.state="READY",this.resetEverything(),this.monitorBuffer_()},t.playlist=function(e,t){if(void 0===t&&(t={}),e){var i=this.playlist_,n=this.pendingSegment_;this.playlist_=e,this.xhrOptions_=t,"INIT"===this.state&&(e.syncInfo={mediaSequence:e.mediaSequence,time:0},"main"===this.loaderType_&&this.syncController_.setDateTimeMappingForStart(e));var r=null;if(i&&(i.id?r=i.id:i.uri&&(r=i.uri)),this.logger_("playlist update ["+r+" => "+(e.id||e.uri)+"]"),this.trigger("syncinfoupdate"),"INIT"===this.state&&this.couldBeginLoading_())return this.init_();if(!i||i.uri!==e.uri)return null!==this.mediaIndex&&(e.endList?this.resyncLoader():this.resetLoader()),this.currentMediaInfo_=void 0,void this.trigger("playlistupdate");t=e.mediaSequence-i.mediaSequence;this.logger_("live window shift ["+t+"]"),null!==this.mediaIndex&&(this.mediaIndex-=t,this.mediaIndex<0?(this.mediaIndex=null,this.partIndex=null):(r=this.playlist_.segments[this.mediaIndex],!this.partIndex||r.parts&&r.parts.length&&r.parts[this.partIndex]||(r=this.mediaIndex,this.logger_("currently processing part (index "+this.partIndex+") no longer exists."),this.resetLoader(),this.mediaIndex=r))),n&&(n.mediaIndex-=t,n.mediaIndex<0?(n.mediaIndex=null,n.partIndex=null):(0<=n.mediaIndex&&(n.segment=e.segments[n.mediaIndex]),0<=n.partIndex&&n.segment.parts&&(n.part=n.segment.parts[n.partIndex]))),this.syncController_.saveExpiredSegmentInfo(i,e)}},t.pause=function(){this.checkBufferTimeout_&&(window.clearTimeout(this.checkBufferTimeout_),this.checkBufferTimeout_=null)},t.paused=function(){return null===this.checkBufferTimeout_},t.resetEverything=function(e){this.ended_=!1,this.appendInitSegment_={audio:!0,video:!0},this.resetLoader(),this.remove(0,1/0,e),this.transmuxer_&&(this.transmuxer_.postMessage({action:"clearAllMp4Captions"}),this.transmuxer_.postMessage({action:"reset"}))},t.resetLoader=function(){this.fetchAtBuffer_=!1,this.resyncLoader()},t.resyncLoader=function(){this.transmuxer_&&kl(this.transmuxer_),this.mediaIndex=null,this.partIndex=null,this.syncPoint_=null,this.isPendingTimestampOffset_=!1,this.callQueue_=[],this.loadQueue_=[],this.metadataQueue_.id3=[],this.metadataQueue_.caption=[],this.abort(),this.transmuxer_&&this.transmuxer_.postMessage({action:"clearParsedMp4Captions"})},t.remove=function(e,t,i,n){if(void 0===i&&(i=function(){}),void 0===n&&(n=!1),(t=t===1/0?this.duration_():t)<=e)this.logger_("skipping remove because end ${end} is <= start ${start}");else if(this.sourceUpdater_&&this.getMediaInfo_()){var r,a=1,s=function(){0===--a&&i()};for(r in!n&&this.audioDisabled_||(a++,this.sourceUpdater_.removeAudio(e,t,s)),!n&&"main"!==this.loaderType_||(this.gopBuffer_=function(e,t,i,n){for(var r=Math.ceil((t-n)*cl),a=Math.ceil((i-n)*cl),n=e.slice(),s=e.length;s--&&!(e[s].pts<=a););if(-1===s)return n;for(var o=s+1;o--&&!(e[o].pts<=r););return o=Math.max(o,0),n.splice(o,s-o+1),n}(this.gopBuffer_,e,t,this.timeMapping_),a++,this.sourceUpdater_.removeVideo(e,t,s)),this.inbandTextTracks_)il(e,t,this.inbandTextTracks_[r]);il(e,t,this.segmentMetadataTrack_),s()}else this.logger_("skipping remove because no source updater or starting media info")},t.monitorBuffer_=function(){this.checkBufferTimeout_&&window.clearTimeout(this.checkBufferTimeout_),this.checkBufferTimeout_=window.setTimeout(this.monitorBufferTick_.bind(this),1)},t.monitorBufferTick_=function(){"READY"===this.state&&this.fillBuffer_(),this.checkBufferTimeout_&&window.clearTimeout(this.checkBufferTimeout_),this.checkBufferTimeout_=window.setTimeout(this.monitorBufferTick_.bind(this),500)},t.fillBuffer_=function(){var e;this.sourceUpdater_.updating()||(e=this.chooseNextRequest_())&&("number"==typeof e.timestampOffset&&(this.isPendingTimestampOffset_=!1,this.timelineChangeController_.pendingTimelineChange({type:this.loaderType_,from:this.currentTimeline_,to:e.timeline})),this.loadSegment_(e))},t.isEndOfStream_=function(e,t,i){if(void 0===e&&(e=this.mediaIndex),void 0===t&&(t=this.playlist_),void 0===i&&(i=this.partIndex),!t||!this.mediaSource_)return!1;var n="number"==typeof e&&t.segments[e],e=e+1===t.segments.length,n=!n||!n.parts||i+1===n.parts.length;return t.endList&&"open"===this.mediaSource_.readyState&&e&&n},t.chooseNextRequest_=function(){var e=this.buffered_(),t=Fo(e)||0,i=jo(e,this.currentTime_()),n=!this.hasPlayed_()&&1<=i,r=i>=this.goalBufferLength_(),e=this.playlist_.segments;if(!e.length||n||r)return null;this.syncPoint_=this.syncPoint_||this.syncController_.getSyncPoint(this.playlist_,this.duration_(),this.currentTimeline_,this.currentTime_());var a,n={partIndex:null,mediaIndex:null,startOfSegment:null,playlist:this.playlist_,isSyncRequest:Boolean(!this.syncPoint_)};n.isSyncRequest?n.mediaIndex=function(e,t,i){t=t||[];for(var n=[],r=0,a=0;a<t.length;a++){var s=t[a];if(e===s.timeline&&(n.push(a),i<(r+=s.duration)))return a}return 0===n.length?0:n[n.length-1]}(this.currentTimeline_,e,t):null!==this.mediaIndex?(r=e[this.mediaIndex],a="number"==typeof this.partIndex?this.partIndex:-1,n.startOfSegment=r.end||t,r.parts&&r.parts[a+1]?(n.mediaIndex=this.mediaIndex,n.partIndex=a+1):n.mediaIndex=this.mediaIndex+1):(a=(o=fl.getMediaInfoForTime({experimentalExactManifestTimings:this.experimentalExactManifestTimings,playlist:this.playlist_,currentTime:this.fetchAtBuffer_?t:this.currentTime_(),startingPartIndex:this.syncPoint_.partIndex,startingSegmentIndex:this.syncPoint_.segmentIndex,startTime:this.syncPoint_.time})).segmentIndex,s=o.startTime,o=o.partIndex,n.getMediaInfoForTime=this.fetchAtBuffer_?"bufferedEnd "+t:"currentTime "+this.currentTime_(),n.mediaIndex=a,n.startOfSegment=s,n.partIndex=o);var s=e[n.mediaIndex],o=s&&"number"==typeof n.partIndex&&s.parts&&s.parts[n.partIndex];if(!s||"number"==typeof n.partIndex&&!o)return null;"number"!=typeof n.partIndex&&s.parts&&(n.partIndex=0,o=s.parts[0]),i||!o||o.independent||(0===n.partIndex?(o=(i=e[n.mediaIndex-1]).parts&&i.parts.length&&i.parts[i.parts.length-1])&&o.independent&&(--n.mediaIndex,n.partIndex=i.parts.length-1,n.independent="previous segment"):s.parts[n.partIndex-1].independent&&(--n.partIndex,n.independent="previous part"));s=this.mediaSource_&&"ended"===this.mediaSource_.readyState;return n.mediaIndex>=e.length-1&&s&&!this.seeking_()?null:this.generateSegmentInfo_(n)},t.generateSegmentInfo_=function(e){var t=e.independent,i=e.playlist,n=e.mediaIndex,r=e.startOfSegment,a=e.isSyncRequest,s=e.partIndex,o=e.forceTimestampOffset,u=e.getMediaInfoForTime,l=i.segments[n],e="number"==typeof s&&l.parts[s],t={requestId:"segment-loader-"+Math.random(),uri:e&&e.resolvedUri||l.resolvedUri,mediaIndex:n,partIndex:e?s:null,isSyncRequest:a,startOfSegment:r,playlist:i,bytes:null,encryptedBytes:null,timestampOffset:null,timeline:l.timeline,duration:e&&e.duration||l.duration,segment:l,part:e,byteLength:0,transmuxer:this.transmuxer_,getMediaInfoForTime:u,independent:t},o="undefined"!=typeof o?o:this.isPendingTimestampOffset_;t.timestampOffset=this.timestampOffsetForSegment_({segmentTimeline:l.timeline,currentTimeline:this.currentTimeline_,startOfSegment:r,buffered:this.buffered_(),overrideCheck:o});o=Fo(this.sourceUpdater_.audioBuffered());return"number"==typeof o&&(t.audioAppendStart=o-this.sourceUpdater_.audioTimestampOffset()),this.sourceUpdater_.videoBuffered().length&&(t.gopsToAlignWith=function(e,t,i){if("undefined"==typeof t||null===t||!e.length)return[];for(var n=Math.ceil((t-i+3)*cl),r=0;r<e.length&&!(e[r].pts>n);r++);return e.slice(r)}(this.gopBuffer_,this.currentTime_()-this.sourceUpdater_.videoTimestampOffset(),this.timeMapping_)),t},t.timestampOffsetForSegment_=function(e){return i=(t=e).segmentTimeline,n=t.currentTimeline,r=t.startOfSegment,e=t.buffered,t.overrideCheck||i!==n?!(i<n)&&e.length?e.end(e.length-1):r:null;var t,i,n,r},t.earlyAbortWhenNeeded_=function(e){var t,i,n,r,a,s,o,u,l,c,d,h,p;!this.vhs_.tech_.paused()&&this.xhrOptions_.timeout&&this.playlist_.attributes.BANDWIDTH&&(Date.now()-(e.firstBytesReceivedAt||Date.now())<1e3||(t=this.currentTime_(),r=e.bandwidth,a=this.pendingSegment_.duration,p=fl.estimateSegmentRequestTime(a,r,this.playlist_,e.bytesReceived),i=this.buffered_(),n=t,void 0===(e=this.vhs_.tech_.playbackRate())&&(e=1),p<=(e=((i.length?i.end(i.length-1):0)-n)/e-1)||(r={master:this.vhs_.playlists.master,currentTime:t,bandwidth:r,duration:this.duration_(),segmentDuration:a,timeUntilRebuffer:e,currentTimeline:this.currentTimeline_,syncController:this.syncController_},a=r.master,s=r.currentTime,o=r.bandwidth,u=r.duration,l=r.segmentDuration,c=r.timeUntilRebuffer,d=r.currentTimeline,h=r.syncController,a=(r=(a=!(a=(r=a.playlists.filter(function(e){return!fl.isIncompatible(e)})).filter(fl.isEnabled)).length?r.filter(function(e){return!fl.isDisabled(e)}):a).filter(fl.hasAttribute.bind(null,"BANDWIDTH")).map(function(e){var t=h.getSyncPoint(e,u,d,s)?1:2;return{playlist:e,rebufferingImpact:fl.estimateSegmentRequestTime(l,o,e)*t-c}})).filter(function(e){return e.rebufferingImpact<=0}),Ju(a,function(e,t){return Zu(t.playlist,e.playlist)}),(r=a.length?a[0]:(Ju(r,function(e,t){return e.rebufferingImpact-t.rebufferingImpact}),r[0]||null))&&(p=p-e-r.rebufferingImpact,!r.playlist||r.playlist.uri===this.playlist_.uri||p<(e<=hl?1:.5)||(this.bandwidth=r.playlist.attributes.BANDWIDTH*Sl.BANDWIDTH_VARIANCE+1,this.trigger("earlyabort"))))))},t.handleAbort_=function(e){this.logger_("Aborting "+rl(e)),this.mediaRequestsAborted+=1},t.handleProgress_=function(e,t){this.earlyAbortWhenNeeded_(t.stats),this.checkForAbort_(t.requestId)||this.trigger("progress")},t.handleTrackInfo_=function(e,t){this.earlyAbortWhenNeeded_(e.stats),this.checkForAbort_(e.requestId)||this.checkForIllegalMediaSwitch(t)||(function(e,t){if(!e&&!t||!e&&t||e&&!t)return!1;if(e===t)return!0;var i=Object.keys(e).sort(),n=Object.keys(t).sort();if(i.length!==n.length)return!1;for(var r=0;r<i.length;r++){var a=i[r];if(a!==n[r])return!1;if(e[a]!==t[a])return!1}return!0}(this.currentMediaInfo_,t=t||{})||(this.appendInitSegment_={audio:!0,video:!0},this.startingMediaInfo_=t,this.currentMediaInfo_=t,this.logger_("trackinfo update",t),this.trigger("trackinfo")),this.checkForAbort_(e.requestId)||(this.pendingSegment_.trackInfo=t,this.hasEnoughInfoToAppend_()&&this.processCallQueue_()))},t.handleTimingInfo_=function(e,t,i,n){var r;this.earlyAbortWhenNeeded_(e.stats),this.checkForAbort_(e.requestId)||((r=this.pendingSegment_)[e=al(t)]=r[e]||{},r[e][i]=n,this.logger_("timinginfo: "+t+" - "+i+" - "+n),this.hasEnoughInfoToAppend_()&&this.processCallQueue_())},t.handleCaptions_=function(e,t){var g,y,v=this;this.earlyAbortWhenNeeded_(e.stats),this.checkForAbort_(e.requestId)||(0!==t.length?this.pendingSegment_.hasAppendedData_?(g=null===this.sourceUpdater_.videoTimestampOffset()?this.sourceUpdater_.audioTimestampOffset():this.sourceUpdater_.videoTimestampOffset(),y={},t.forEach(function(e){y[e.stream]=y[e.stream]||{startTime:1/0,captions:[],endTime:0};var t=y[e.stream];t.startTime=Math.min(t.startTime,e.startTime+g),t.endTime=Math.max(t.endTime,e.endTime+g),t.captions.push(e)}),Object.keys(y).forEach(function(e){var t,i,n,r,a,s,o,u,l,c,d=y[e],h=d.startTime,p=d.endTime,f=d.captions,m=v.inbandTextTracks_;v.logger_("adding cues from "+h+" -> "+p+" for "+e),t=m,i=v.vhs_.tech_,t[n=e]||(i.trigger({type:"usage",name:"vhs-608"}),i.trigger({type:"usage",name:"hls-608"}),/^cc708_/.test(r=n)&&(r="SERVICE"+n.split("_")[1]),(o=i.textTracks().getTrackById(r))?t[n]=o:(s=a=n,d=!1,(o=(i.options_.vhs&&i.options_.vhs.captionServices||{})[r])&&(a=o.label,s=o.language,d=o.default),t[n]=i.addRemoteTextTrack({kind:"captions",id:r,default:d,label:a,language:s},!1).track)),il(h,p,m[e]),l=(f={captionArray:f,inbandTextTracks:m,timestampOffset:g}).inbandTextTracks,m=f.captionArray,c=f.timestampOffset,m&&(u=window.WebKitDataCue||window.VTTCue,m.forEach(function(e){var t=e.stream;l[t].addCue(new u(e.startTime+c,e.endTime+c,e.text))}))}),this.transmuxer_&&this.transmuxer_.postMessage({action:"clearParsedMp4Captions"})):this.metadataQueue_.caption.push(this.handleCaptions_.bind(this,e,t)):this.logger_("SegmentLoader received no captions from a caption event"))},t.handleId3_=function(e,t,i){var n,r,a,s;this.earlyAbortWhenNeeded_(e.stats),this.checkForAbort_(e.requestId)||(this.pendingSegment_.hasAppendedData_?(n=null===this.sourceUpdater_.videoTimestampOffset()?this.sourceUpdater_.audioTimestampOffset():this.sourceUpdater_.videoTimestampOffset(),r=this.inbandTextTracks_,a=i,s=this.vhs_.tech_,r.metadataTrack_||(r.metadataTrack_=s.addRemoteTextTrack({kind:"metadata",label:"Timed Metadata"},!1).track,r.metadataTrack_.inBandMetadataTrackDispatchType=a),tl({inbandTextTracks:this.inbandTextTracks_,metadataArray:t,timestampOffset:n,videoDuration:this.duration_()})):this.metadataQueue_.id3.push(this.handleId3_.bind(this,e,t,i)))},t.processMetadataQueue_=function(){this.metadataQueue_.id3.forEach(function(e){return e()}),this.metadataQueue_.caption.forEach(function(e){return e()}),this.metadataQueue_.id3=[],this.metadataQueue_.caption=[]},t.processCallQueue_=function(){var e=this.callQueue_;this.callQueue_=[],e.forEach(function(e){return e()})},t.processLoadQueue_=function(){var e=this.loadQueue_;this.loadQueue_=[],e.forEach(function(e){return e()})},t.hasEnoughInfoToLoad_=function(){if("audio"!==this.loaderType_)return!0;var e=this.pendingSegment_;return!!e&&(!this.getCurrentMediaInfo_()||!sl({timelineChangeController:this.timelineChangeController_,currentTimeline:this.currentTimeline_,segmentTimeline:e.timeline,loaderType:this.loaderType_,audioDisabled:this.audioDisabled_}))},t.getCurrentMediaInfo_=function(e){return(e=void 0===e?this.pendingSegment_:e)&&e.trackInfo||this.currentMediaInfo_},t.getMediaInfo_=function(e){return void 0===e&&(e=this.pendingSegment_),this.getCurrentMediaInfo_(e)||this.startingMediaInfo_},t.hasEnoughInfoToAppend_=function(){if(!this.sourceUpdater_.ready())return!1;if(this.waitingOnRemove_||this.quotaExceededErrorRetryTimeout_)return!1;var e=this.pendingSegment_,t=this.getCurrentMediaInfo_();if(!e||!t)return!1;var i=t.hasAudio,n=t.hasVideo,t=t.isMuxed;return!(n&&!e.videoTimingInfo)&&(!(i&&!this.audioDisabled_&&!t&&!e.audioTimingInfo)&&!sl({timelineChangeController:this.timelineChangeController_,currentTimeline:this.currentTimeline_,segmentTimeline:e.timeline,loaderType:this.loaderType_,audioDisabled:this.audioDisabled_}))},t.handleData_=function(e,t){if(this.earlyAbortWhenNeeded_(e.stats),!this.checkForAbort_(e.requestId))if(!this.callQueue_.length&&this.hasEnoughInfoToAppend_()){var i,n=this.pendingSegment_;if(this.setTimeMapping_(n.timeline),this.updateMediaSecondsLoaded_(n.part||n.segment),"closed"!==this.mediaSource_.readyState){if(e.map&&(e.map=this.initSegmentForMap(e.map,!0),n.segment.map=e.map),e.key&&this.segmentKey(e.key,!0),n.isFmp4=e.isFmp4,n.timingInfo=n.timingInfo||{},n.isFmp4?(this.trigger("fmp4"),n.timingInfo.start=n[al(t.type)].start):(i=this.getCurrentMediaInfo_(),(i="main"===this.loaderType_&&i&&i.hasVideo)&&(r=n.videoTimingInfo.start),n.timingInfo.start=this.trueSegmentStart_({currentStart:n.timingInfo.start,playlist:n.playlist,mediaIndex:n.mediaIndex,currentVideoTimestampOffset:this.sourceUpdater_.videoTimestampOffset(),useVideoTimingInfo:i,firstVideoFrameTimeForData:r,videoTimingInfo:n.videoTimingInfo,audioTimingInfo:n.audioTimingInfo})),this.updateAppendInitSegmentStatus(n,t.type),this.updateSourceBufferTimestampOffset_(n),n.isSyncRequest){this.updateTimingInfoEnd_(n),this.syncController_.saveSegmentTimingInfo({segmentInfo:n,shouldSaveTimelineMapping:"main"===this.loaderType_});var r=this.chooseNextRequest_();if(r.mediaIndex!==n.mediaIndex||r.partIndex!==n.partIndex)return void this.logger_("sync segment was incorrect, not appending");this.logger_("sync segment was correct, appending")}n.hasAppendedData_=!0,this.processMetadataQueue_(),this.appendData_(n,t)}}else this.callQueue_.push(this.handleData_.bind(this,e,t))},t.updateAppendInitSegmentStatus=function(e,t){"main"!==this.loaderType_||"number"!=typeof e.timestampOffset||e.changedTimestampOffset||(this.appendInitSegment_={audio:!0,video:!0}),this.playlistOfLastInitSegment_[t]!==e.playlist&&(this.appendInitSegment_[t]=!0)},t.getInitSegmentAndUpdateState_=function(e){var t=e.type,i=e.initSegment,n=e.map,r=e.playlist;if(n){e=bu(n);if(this.activeInitSegmentId_===e)return null;i=this.initSegmentForMap(n,!0).bytes,this.activeInitSegmentId_=e}return i&&this.appendInitSegment_[t]?(this.playlistOfLastInitSegment_[t]=r,this.appendInitSegment_[t]=!1,this.activeInitSegmentId_=null,i):null},t.handleQuotaExceededError_=function(e,t){var i=this,n=e.segmentInfo,r=e.type,a=e.bytes,s=this.sourceUpdater_.audioBuffered(),o=this.sourceUpdater_.videoBuffered();1<s.length&&this.logger_("On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: "+Bo(s).join(", ")),1<o.length&&this.logger_("On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: "+Bo(o).join(", "));var u=s.length?s.start(0):0,l=s.length?s.end(s.length-1):0,c=o.length?o.start(0):0,e=o.length?o.end(o.length-1):0;if(l-u<=1&&e-c<=1)return this.logger_("On QUOTA_EXCEEDED_ERR, single segment too large to append to buffer, triggering an error. Appended byte length: "+a.byteLength+", audio buffer: "+Bo(s).join(", ")+", video buffer: "+Bo(o).join(", ")+", "),this.error({message:"Quota exceeded error with append of a single segment of content",excludeUntil:1/0}),void this.trigger("error");this.waitingOnRemove_=!0,this.callQueue_.push(this.appendToSourceBuffer_.bind(this,{segmentInfo:n,type:r,bytes:a}));a=this.currentTime_()-1;this.logger_("On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to "+a),this.remove(0,a,function(){i.logger_("On QUOTA_EXCEEDED_ERR, retrying append in 1s"),i.waitingOnRemove_=!1,i.quotaExceededErrorRetryTimeout_=window.setTimeout(function(){i.logger_("On QUOTA_EXCEEDED_ERR, re-processing call queue"),i.quotaExceededErrorRetryTimeout_=null,i.processCallQueue_()},1e3)},!0)},t.handleAppendError_=function(e,t){var i=e.segmentInfo,n=e.type,e=e.bytes;t&&(22!==t.code?(this.logger_("Received non QUOTA_EXCEEDED_ERR on append",t),this.error(n+" append of "+e.length+"b failed for segment #"+i.mediaIndex+" in playlist "+i.playlist.id),this.trigger("appenderror")):this.handleQuotaExceededError_({segmentInfo:i,type:n,bytes:e}))},t.appendToSourceBuffer_=function(e){var t,i,n=e.segmentInfo,r=e.type,a=e.initSegment,s=e.data,o=e.bytes;o||(e=[s],s=s.byteLength,a&&(e.unshift(a),s+=a.byteLength),i=0,(e={bytes:s,segments:e}).bytes&&(t=new Uint8Array(e.bytes),e.segments.forEach(function(e){t.set(e,i),i+=e.byteLength})),o=t),this.sourceUpdater_.appendBuffer({segmentInfo:n,type:r,bytes:o},this.handleAppendError_.bind(this,{segmentInfo:n,type:r,bytes:o}))},t.handleSegmentTimingInfo_=function(e,t,i){this.pendingSegment_&&t===this.pendingSegment_.requestId&&((t=this.pendingSegment_.segment)[e=e+"TimingInfo"]||(t[e]={}),t[e].transmuxerPrependedSeconds=i.prependedContentDuration||0,t[e].transmuxedPresentationStart=i.start.presentation,t[e].transmuxedDecodeStart=i.start.decode,t[e].transmuxedPresentationEnd=i.end.presentation,t[e].transmuxedDecodeEnd=i.end.decode,t[e].baseMediaDecodeTime=i.baseMediaDecodeTime)},t.appendData_=function(e,t){var i=t.type,n=t.data;n&&n.byteLength&&("audio"===i&&this.audioDisabled_||(t=this.getInitSegmentAndUpdateState_({type:i,initSegment:t.initSegment,playlist:e.playlist,map:e.isFmp4?e.segment.map:null}),this.appendToSourceBuffer_({segmentInfo:e,type:i,initSegment:t,data:n})))},t.loadSegment_=function(t){var i=this;this.state="WAITING",this.pendingSegment_=t,this.trimBackBuffer_(t),"number"==typeof t.timestampOffset&&this.transmuxer_&&this.transmuxer_.postMessage({action:"clearAllMp4Captions"}),this.hasEnoughInfoToLoad_()?this.updateTransmuxerAndRequestSegment_(t):this.loadQueue_.push(function(){var e=g({},t,{forceTimestampOffset:!0});g(t,i.generateSegmentInfo_(e)),i.isPendingTimestampOffset_=!1,i.updateTransmuxerAndRequestSegment_(t)})},t.updateTransmuxerAndRequestSegment_=function(n){var r=this;this.shouldUpdateTransmuxerTimestampOffset_(n.timestampOffset)&&(this.gopBuffer_.length=0,n.gopsToAlignWith=[],this.timeMapping_=0,this.transmuxer_.postMessage({action:"reset"}),this.transmuxer_.postMessage({action:"setTimestampOffset",timestampOffset:n.timestampOffset}));var e=this.createSimplifiedSegmentObj_(n),t=this.isEndOfStream_(n.mediaIndex,n.playlist,n.partIndex),i=null!==this.mediaIndex,a=n.timeline!==this.currentTimeline_&&0<n.timeline,a=t||i&&a;this.logger_("Requesting "+rl(n)),e.map&&!e.map.bytes&&(this.logger_("going to request init segment."),this.appendInitSegment_={video:!0,audio:!0}),n.abortRequests=Gu({xhr:this.vhs_.xhr,xhrOptions:this.xhrOptions_,decryptionWorker:this.decrypter_,segment:e,abortFn:this.handleAbort_.bind(this,n),progressFn:this.handleProgress_.bind(this),trackInfoFn:this.handleTrackInfo_.bind(this),timingInfoFn:this.handleTimingInfo_.bind(this),videoSegmentTimingInfoFn:this.handleSegmentTimingInfo_.bind(this,"video",n.requestId),audioSegmentTimingInfoFn:this.handleSegmentTimingInfo_.bind(this,"audio",n.requestId),captionsFn:this.handleCaptions_.bind(this),isEndOfTimeline:a,endedTimelineFn:function(){r.logger_("received endedtimeline callback")},id3Fn:this.handleId3_.bind(this),dataFn:this.handleData_.bind(this),doneFn:this.segmentRequestFinished_.bind(this),onTransmuxerLog:function(e){var t=e.message,i=e.level,e=e.stream;r.logger_(rl(n)+" logged from transmuxer stream "+e+" as a "+i+": "+t)}})},t.trimBackBuffer_=function(e){var t,i,n,r,r=(t=this.seekable_(),i=this.currentTime_(),n=this.playlist_.targetDuration||10,r=i-Sl.BACK_BUFFER_LENGTH,t.length&&(r=Math.max(r,t.start(0))),Math.min(i-n,r));0<r&&this.remove(0,r)},t.createSimplifiedSegmentObj_=function(e){var t=e.segment,i=e.part,n={resolvedUri:(i||t).resolvedUri,byterange:(i||t).byterange,requestId:e.requestId,transmuxer:e.transmuxer,audioAppendStart:e.audioAppendStart,gopsToAlignWith:e.gopsToAlignWith,part:e.part},i=e.playlist.segments[e.mediaIndex-1];return i&&i.timeline===t.timeline&&(i.videoTimingInfo?n.baseStartTime=i.videoTimingInfo.transmuxedDecodeEnd:i.audioTimingInfo&&(n.baseStartTime=i.audioTimingInfo.transmuxedDecodeEnd)),t.key&&(e=t.key.iv||new Uint32Array([0,0,0,e.mediaIndex+e.playlist.mediaSequence]),n.key=this.segmentKey(t.key),n.key.iv=e),t.map&&(n.map=this.initSegmentForMap(t.map)),n},t.saveTransferStats_=function(e){this.mediaRequests+=1,e&&(this.mediaBytesTransferred+=e.bytesReceived,this.mediaTransferDuration+=e.roundTripTime)},t.saveBandwidthRelatedStats_=function(e,t){this.pendingSegment_.byteLength=t.bytesReceived,e<1/60?this.logger_("Ignoring segment's bandwidth because its duration of "+e+" is less than the min to record "+1/60):(this.bandwidth=t.bandwidth,this.roundTrip=t.roundTripTime)},t.handleTimeout_=function(){this.mediaRequestsTimedout+=1,this.bandwidth=1,this.roundTrip=NaN,this.trigger("bandwidthupdate")},t.segmentRequestFinished_=function(e,t,i){if(this.callQueue_.length)this.callQueue_.push(this.segmentRequestFinished_.bind(this,e,t,i));else if(this.saveTransferStats_(t.stats),this.pendingSegment_&&t.requestId===this.pendingSegment_.requestId){if(e)return this.pendingSegment_=null,this.state="READY",e.code===Al?void 0:(this.pause(),e.code===xl?void this.handleTimeout_():(this.mediaRequestsErrored+=1,this.error(e),void this.trigger("error")));e=this.pendingSegment_;this.saveBandwidthRelatedStats_(e.duration,t.stats),e.endOfAllRequests=t.endOfAllRequests,i.gopInfo&&(this.gopBuffer_=function(e,t,i){if(!t.length)return e;if(i)return t.slice();for(var n=t[0].pts,r=0;r<e.length&&!(e[r].pts>=n);r++);return e.slice(0,r).concat(t)}(this.gopBuffer_,i.gopInfo,this.safeAppend_)),this.state="APPENDING",this.trigger("appending"),this.waitForAppendsToComplete_(e)}},t.setTimeMapping_=function(e){e=this.syncController_.mappingForTimeline(e);null!==e&&(this.timeMapping_=e)},t.updateMediaSecondsLoaded_=function(e){"number"==typeof e.start&&"number"==typeof e.end?this.mediaSecondsLoaded+=e.end-e.start:this.mediaSecondsLoaded+=e.duration},t.shouldUpdateTransmuxerTimestampOffset_=function(e){return null!==e&&("main"===this.loaderType_&&e!==this.sourceUpdater_.videoTimestampOffset()||!this.audioDisabled_&&e!==this.sourceUpdater_.audioTimestampOffset())},t.trueSegmentStart_=function(e){var t=e.currentStart,i=e.playlist,n=e.mediaIndex,r=e.firstVideoFrameTimeForData,a=e.currentVideoTimestampOffset,s=e.useVideoTimingInfo,o=e.videoTimingInfo,e=e.audioTimingInfo;if("undefined"!=typeof t)return t;if(!s)return e.start;i=i.segments[n-1];return 0!==n&&i&&"undefined"!=typeof i.start&&i.end===r+a?o.start:r},t.waitForAppendsToComplete_=function(e){var t=this.getCurrentMediaInfo_(e);if(!t)return this.error({message:"No starting media returned, likely due to an unsupported media format.",blacklistDuration:1/0}),void this.trigger("error");var i=t.hasAudio,n=t.hasVideo,t=t.isMuxed,n="main"===this.loaderType_&&n,t=!this.audioDisabled_&&i&&!t;if(e.waitingOnAppends=0,!e.hasAppendedData_)return e.timingInfo||"number"!=typeof e.timestampOffset||(this.isPendingTimestampOffset_=!0),e.timingInfo={start:0},e.waitingOnAppends++,this.isPendingTimestampOffset_||(this.updateSourceBufferTimestampOffset_(e),this.processMetadataQueue_()),void this.checkAppendsDone_(e);n&&e.waitingOnAppends++,t&&e.waitingOnAppends++,n&&this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this,e)),t&&this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this,e))},t.checkAppendsDone_=function(e){this.checkForAbort_(e.requestId)||(e.waitingOnAppends--,0===e.waitingOnAppends&&this.handleAppendsDone_())},t.checkForIllegalMediaSwitch=function(e){var t,i,e=(t=this.loaderType_,i=this.getCurrentMediaInfo_(),e=e,"main"===t&&i&&e?e.hasAudio||e.hasVideo?i.hasVideo&&!e.hasVideo?"Only audio found in segment when we expected video. We can't switch to audio only from a stream that had video. To get rid of this message, please add codec information to the manifest.":!i.hasVideo&&e.hasVideo?"Video found in segment when we expected only audio. We can't switch to a stream with video from an audio only stream. To get rid of this message, please add codec information to the manifest.":null:"Neither audio nor video found in segment.":null);return!!e&&(this.error({message:e,blacklistDuration:1/0}),this.trigger("error"),!0)},t.updateSourceBufferTimestampOffset_=function(e){var t;null===e.timestampOffset||"number"!=typeof e.timingInfo.start||e.changedTimestampOffset||"main"!==this.loaderType_||(t=!1,e.timestampOffset-=e.timingInfo.start,e.changedTimestampOffset=!0,e.timestampOffset!==this.sourceUpdater_.videoTimestampOffset()&&(this.sourceUpdater_.videoTimestampOffset(e.timestampOffset),t=!0),e.timestampOffset!==this.sourceUpdater_.audioTimestampOffset()&&(this.sourceUpdater_.audioTimestampOffset(e.timestampOffset),t=!0),t&&this.trigger("timestampoffset"))},t.updateTimingInfoEnd_=function(e){e.timingInfo=e.timingInfo||{};var t=this.getMediaInfo_(),t="main"===this.loaderType_&&t&&t.hasVideo&&e.videoTimingInfo?e.videoTimingInfo:e.audioTimingInfo;t&&(e.timingInfo.end="number"==typeof t.end?t.end:t.start+e.duration)},t.handleAppendsDone_=function(){if(this.pendingSegment_&&this.trigger("appendsdone"),!this.pendingSegment_)return this.state="READY",void(this.paused()||this.monitorBuffer_());var e=this.pendingSegment_;this.updateTimingInfoEnd_(e),this.shouldSaveSegmentTimingInfo_&&this.syncController_.saveSegmentTimingInfo({segmentInfo:e,shouldSaveTimelineMapping:"main"===this.loaderType_});var t=ul(e,this.sourceType_);if(t&&("warn"===t.severity?tr.log.warn(t.message):this.logger_(t.message)),this.recordThroughput_(e),this.pendingSegment_=null,this.state="READY",!e.isSyncRequest||(this.trigger("syncinfoupdate"),e.hasAppendedData_)){this.logger_("Appended "+rl(e)),this.addSegmentMetadataCue_(e),this.fetchAtBuffer_=!0,this.currentTimeline_!==e.timeline&&(this.timelineChangeController_.lastTimelineChange({type:this.loaderType_,from:this.currentTimeline_,to:e.timeline}),"main"!==this.loaderType_||this.audioDisabled_||this.timelineChangeController_.lastTimelineChange({type:"audio",from:this.currentTimeline_,to:e.timeline})),this.currentTimeline_=e.timeline,this.trigger("syncinfoupdate");var i=e.segment,t=e.part,i=i.end&&this.currentTime_()-i.end>3*e.playlist.targetDuration,t=t&&t.end&&this.currentTime_()-t.end>3*e.playlist.partTargetDuration;if(i||t)return this.logger_("bad "+(i?"segment":"part")+" "+rl(e)),void this.resetEverything();null!==this.mediaIndex&&this.trigger("bandwidthupdate"),this.trigger("progress"),this.mediaIndex=e.mediaIndex,this.partIndex=e.partIndex,this.isEndOfStream_(e.mediaIndex,e.playlist,e.partIndex)&&this.endOfStream(),this.trigger("appended"),e.hasAppendedData_&&this.mediaAppends++,this.paused()||this.monitorBuffer_()}else this.logger_("Throwing away un-appended sync request "+rl(e))},t.recordThroughput_=function(e){var t,i;e.duration<1/60?this.logger_("Ignoring segment's throughput because its duration of "+e.duration+" is less than the min to record "+1/60):(t=this.throughput.rate,i=Date.now()-e.endOfAllRequests+1,i=Math.floor(e.byteLength/i*8*1e3),this.throughput.rate+=(i-t)/++this.throughput.count)},t.addSegmentMetadataCue_=function(e){var t,i,n,r;this.segmentMetadataTrack_&&(i=(t=e.segment).start,r=t.end,nl(i)&&nl(r)&&(il(i,r,this.segmentMetadataTrack_),n=window.WebKitDataCue||window.VTTCue,e={custom:t.custom,dateTimeObject:t.dateTimeObject,dateTimeString:t.dateTimeString,bandwidth:e.playlist.attributes.BANDWIDTH,resolution:e.playlist.attributes.RESOLUTION,codecs:e.playlist.attributes.CODECS,byteLength:e.byteLength,uri:e.uri,timeline:e.timeline,playlist:e.playlist.id,start:i,end:r},(r=new n(i,r,JSON.stringify(e))).value=e,this.segmentMetadataTrack_.addCue(r)))},e}(tr.EventTarget);function Ol(){}function Rl(e){return"string"!=typeof e?e:e.replace(/./,function(e){return e.toUpperCase()})}function Ml(e,t){var i=t[e+"Buffer"];return i&&i.updating||t.queuePending[e]}function Nl(e,t){if(0!==t.queue.length){var i=0,n=t.queue[i];if("mediaSource"!==n.type){if("mediaSource"!==e&&t.ready()&&"closed"!==t.mediaSource.readyState&&!Ml(e,t)){if(n.type!==e){if(null===(i=function(e,t){for(var i=0;i<t.length;i++){var n=t[i];if("mediaSource"===n.type)return null;if(n.type===e)return i}return null}(e,t.queue)))return;n=t.queue[i]}t.queue.splice(i,1),(t.queuePending[e]=n).action(e,t),n.doneFn||(t.queuePending[e]=null,Nl(e,t))}}else t.updating()||"closed"===t.mediaSource.readyState||(t.queue.shift(),n.action(t),n.doneFn&&n.doneFn(),Nl("audio",t),Nl("video",t))}}function Ul(e,t){var i=t[e+"Buffer"],n=Rl(e);i&&(i.removeEventListener("updateend",t["on"+n+"UpdateEnd_"]),i.removeEventListener("error",t["on"+n+"Error_"]),t.codecs[e]=null,t[e+"Buffer"]=null)}function Bl(e,t){return e&&t&&-1!==Array.prototype.indexOf.call(e.sourceBuffers,t)}function Fl(e){var t=e.type,i=e.sourceUpdater,n=e.action,r=e.doneFn,e=e.name;i.queue.push({type:t,action:n,doneFn:r,name:e}),Nl(t,i)}function jl(i,n){return function(e){var t;n.queuePending[i]&&(t=n.queuePending[i].doneFn,n.queuePending[i]=null,t&&t(n[i+"Error_"])),Nl(i,n)}}function Hl(e){return decodeURIComponent(escape(String.fromCharCode.apply(null,e)))}function ql(e,t){e.abort(),e.pause(),t&&t.activePlaylistLoader&&(t.activePlaylistLoader.pause(),t.activePlaylistLoader=null)}function Vl(e,t){(t.activePlaylistLoader=e).load()}function Wl(e,t){for(var i=0;i<e.length;i++){if(tu(t,e[i]))return!0;if(e[i].playlists&&Wl(e[i].playlists,t))return!0}return!1}function Gl(a){["AUDIO","SUBTITLES","CLOSED-CAPTIONS"].forEach(function(e){mc[e](e,a)});var e,s=a.mediaTypes,t=a.masterPlaylistLoader,i=a.tech,n=a.vhs,r=a.segmentLoaders,o=r.AUDIO,u=r.main;function l(){s.AUDIO.onTrackChanged(),i.trigger({type:"usage",name:"vhs-audio-change"}),i.trigger({type:"usage",name:"hls-audio-change"})}for(e in["AUDIO","SUBTITLES"].forEach(function(e){var u,l,o,c,t,i,d,h,n,r;s[e].activeGroup=(u=e,l=a,function(t){var e=l.masterPlaylistLoader,i=l.mediaTypes[u].groups,n=e.media();if(!n)return null;var r=null;n.attributes[u]&&(r=i[n.attributes[u]]);var a=Object.keys(i);if(!r)if("AUDIO"===u&&1<a.length&&nu(l.master))for(var s=0;s<a.length;s++){var o=i[a[s]];if(Wl(o,n)){r=o;break}}else i.main?r=i.main:1===a.length&&(r=i[a[0]]);return"undefined"==typeof t?r:null!==t&&r&&r.filter(function(e){return e.id===t.id})[0]||null}),s[e].activeTrack=gc[e](e,a),s[e].onGroupChanged=(o=e,c=a,function(){var e=c.segmentLoaders,t=e[o],i=e.main,n=c.mediaTypes[o],r=n.activeTrack(),a=n.getActiveGroup(),s=n.activePlaylistLoader,e=n.lastGroup_;a&&e&&a.id===e.id||(n.lastGroup_=a,n.lastTrack_=r,ql(t,n),a&&!a.isMasterPlaylist&&(a.playlistLoader?(t.resyncLoader(),Vl(a.playlistLoader,n)):s&&i.resetEverything()))}),s[e].onGroupChanging=(t=e,i=a,function(){var e=i.segmentLoaders[t];i.mediaTypes[t].lastGroup_=null,e.abort(),e.pause()}),s[e].onTrackChanged=(d=e,h=a,function(){var e=h.masterPlaylistLoader,t=h.segmentLoaders,i=t[d],n=t.main,r=h.mediaTypes[d],a=r.activeTrack(),s=r.getActiveGroup(),o=r.activePlaylistLoader,u=r.lastTrack_;if((!u||!a||u.id!==a.id)&&(r.lastGroup_=s,r.lastTrack_=a,ql(i,r),s)){if(s.isMasterPlaylist){if(!a||!u||a.id===u.id)return;var l=h.vhs.masterPlaylistController_,t=l.selectPlaylist();return l.media()===t?void 0:(r.logger_("track change. Switching master audio from "+u.id+" to "+a.id),e.pause(),n.resetEverything(),void l.fastQualityChange_(t))}if("AUDIO"===d){if(!s.playlistLoader)return n.setAudio(!0),void n.resetEverything();i.setAudio(!0),n.setAudio(!1)}o!==s.playlistLoader&&(i.track&&i.track(a),i.resetEverything()),Vl(s.playlistLoader,r)}}),s[e].getActiveGroup=(n=e,r=a.mediaTypes,function(){var e=r[n].activeTrack();return e?r[n].activeGroup(e):null})}),(r=s.AUDIO.activeGroup())&&(r=(r.filter(function(e){return e.default})[0]||r[0]).id,s.AUDIO.tracks[r].enabled=!0,s.AUDIO.onGroupChanged(),s.AUDIO.onTrackChanged(),s.AUDIO.getActiveGroup().playlistLoader?(u.setAudio(!1),o.setAudio(!0)):u.setAudio(!0)),t.on("mediachange",function(){["AUDIO","SUBTITLES"].forEach(function(e){return s[e].onGroupChanged()})}),t.on("mediachanging",function(){["AUDIO","SUBTITLES"].forEach(function(e){return s[e].onGroupChanging()})}),i.audioTracks().addEventListener("change",l),i.remoteTextTracks().addEventListener("change",s.SUBTITLES.onTrackChanged),n.on("dispose",function(){i.audioTracks().removeEventListener("change",l),i.remoteTextTracks().removeEventListener("change",s.SUBTITLES.onTrackChanged)}),i.clearTracks("audio"),s.AUDIO.tracks)i.audioTracks().addTrack(s.AUDIO.tracks[e])}function zl(e,t,i){var n,r,a,s,o=e.masterPlaylistController_,u=o[(e.options_.smoothQualityChange?"smooth":"fast")+"QualityChange_"].bind(o);t.attributes&&(n=t.attributes.RESOLUTION,this.width=n&&n.width,this.height=n&&n.height,this.bandwidth=t.attributes.BANDWIDTH),this.codecs=Yu(o.master(),t),this.playlist=t,this.id=i,this.enabled=(r=e.playlists,a=t.id,s=u,function(e){var t=r.master.playlists[a],i=$o(t),n=Jo(t);return"undefined"==typeof e?n:(e?delete t.disabled:t.disabled=!0,e===n||i||(s(),e?r.trigger("renditionenabled"):r.trigger("renditiondisabled")),e)})}function Xl(t,e){var i=0,n=0,r=tr.mergeOptions(Tc,e);function a(){n&&t.currentTime(n)}function s(e){null!=e&&(n=t.duration()!==1/0&&t.currentTime()||0,t.one("loadedmetadata",a),t.src(e),t.trigger({type:"usage",name:"vhs-error-reload"}),t.trigger({type:"usage",name:"hls-error-reload"}),t.play())}function o(){return Date.now()-i<1e3*r.errorInterval?(t.trigger({type:"usage",name:"vhs-error-reload-canceled"}),void t.trigger({type:"usage",name:"hls-error-reload-canceled"})):r.getSource&&"function"==typeof r.getSource?(i=Date.now(),r.getSource.call(t,s)):void tr.log.error("ERROR: reloadSourceOnError - The option getSource must be a function!")}function u(){t.off("loadedmetadata",a),t.off("error",o),t.off("dispose",u)}t.ready(function(){t.trigger({type:"usage",name:"vhs-error-reload-initialized"}),t.trigger({type:"usage",name:"hls-error-reload-initialized"})}),t.on("error",o),t.on("dispose",u),t.reloadSourceOnError=function(e){u(),Xl(t,e)}}var Kl,Yl=["video","audio"],Ql=function(n,r,a){return function(t,i){var e=i[t+"Buffer"];if(Bl(i.mediaSource,e)){i.logger_("Appending segment "+r.mediaIndex+"'s "+n.length+" bytes to "+t+"Buffer");try{e.appendBuffer(n)}catch(e){i.logger_("Error with code "+e.code+" "+(22===e.code?"(QUOTA_EXCEEDED_ERR) ":"")+"when appending segment "+r.mediaIndex+" to "+t+"Buffer"),i.queuePending[t]=null,a(e)}}}},$l=function(n,r){return function(t,i){var e=i[t+"Buffer"];if(Bl(i.mediaSource,e)){i.logger_("Removing "+n+" to "+r+" from "+t+"Buffer");try{e.remove(n,r)}catch(e){i.logger_("Remove "+n+" to "+r+" from "+t+"Buffer failed")}}}},Jl=function(n){return function(e,t){var i=t[e+"Buffer"];Bl(t.mediaSource,i)&&(t.logger_("Setting "+e+"timestampOffset to "+n),i.timestampOffset=n)}},Zl=function(i){return function(e,t){i()}},ec=function(t){return function(e){if("open"===e.mediaSource.readyState){e.logger_("Calling mediaSource endOfStream("+(t||"")+")");try{e.mediaSource.endOfStream(t)}catch(e){tr.log.warn("Failed to call media source endOfStream",e)}}}},tc=function(t){return function(e){e.logger_("Setting mediaSource duration to "+t);try{e.mediaSource.duration=t}catch(e){tr.log.warn("Failed to set media source duration",e)}}},ic=function(){return function(t,e){if("open"===e.mediaSource.readyState){var i=e[t+"Buffer"];if(Bl(e.mediaSource,i)){e.logger_("calling abort on "+t+"Buffer");try{i.abort()}catch(e){tr.log.warn("Failed to abort on "+t+"Buffer",e)}}}}},nc=function(n,r){return function(e){var t=Rl(n),i=mr(r);e.logger_("Adding "+n+"Buffer with codec "+r+" to mediaSource");i=e.mediaSource.addSourceBuffer(i);i.addEventListener("updateend",e["on"+t+"UpdateEnd_"]),i.addEventListener("error",e["on"+t+"Error_"]),e.codecs[n]=r,e[n+"Buffer"]=i}},rc=function(i){return function(e){var t=e[i+"Buffer"];if(Ul(i,e),Bl(e.mediaSource,t)){e.logger_("Removing "+i+"Buffer with codec "+e.codecs[i]+" from mediaSource");try{e.mediaSource.removeSourceBuffer(t)}catch(e){tr.log.warn("Failed to removeSourceBuffer "+i+"Buffer",e)}}}},ac=function(r){return function(e,t){var i=t[e+"Buffer"],n=mr(r);Bl(t.mediaSource,i)&&t.codecs[e]!==r&&(t.logger_("changing "+e+"Buffer codec from "+t.codecs[e]+" to "+r),i.changeType(n),t.codecs[e]=r)}},sc=function(i){function e(e){var t=i.call(this)||this;return t.mediaSource=e,t.sourceopenListener_=function(){return Nl("mediaSource",ft(t))},t.mediaSource.addEventListener("sourceopen",t.sourceopenListener_),t.logger_=Oo("SourceUpdater"),t.audioTimestampOffset_=0,t.videoTimestampOffset_=0,t.queue=[],t.queuePending={audio:null,video:null},t.delayedAudioAppendQueue_=[],t.videoAppendQueued_=!1,t.codecs={},t.onVideoUpdateEnd_=jl("video",ft(t)),t.onAudioUpdateEnd_=jl("audio",ft(t)),t.onVideoError_=function(e){t.videoError_=e},t.onAudioError_=function(e){t.audioError_=e},t.createdSourceBuffers_=!1,t.initializedEme_=!1,t.triggeredReady_=!1,t}mt(e,i);var t=e.prototype;return t.initializedEme=function(){this.initializedEme_=!0,this.triggerReady()},t.hasCreatedSourceBuffers=function(){return this.createdSourceBuffers_},t.hasInitializedAnyEme=function(){return this.initializedEme_},t.ready=function(){return this.hasCreatedSourceBuffers()&&this.hasInitializedAnyEme()},t.createSourceBuffers=function(e){this.hasCreatedSourceBuffers()||(this.addOrChangeSourceBuffers(e),this.createdSourceBuffers_=!0,this.trigger("createdsourcebuffers"),this.triggerReady())},t.triggerReady=function(){this.ready()&&!this.triggeredReady_&&(this.triggeredReady_=!0,this.trigger("ready"))},t.addSourceBuffer=function(e,t){Fl({type:"mediaSource",sourceUpdater:this,action:nc(e,t),name:"addSourceBuffer"})},t.abort=function(e){Fl({type:e,sourceUpdater:this,action:ic(e),name:"abort"})},t.removeSourceBuffer=function(e){this.canRemoveSourceBuffer()?Fl({type:"mediaSource",sourceUpdater:this,action:rc(e),name:"removeSourceBuffer"}):tr.log.error("removeSourceBuffer is not supported!")},t.canRemoveSourceBuffer=function(){return!tr.browser.IE_VERSION&&!tr.browser.IS_FIREFOX&&window.MediaSource&&window.MediaSource.prototype&&"function"==typeof window.MediaSource.prototype.removeSourceBuffer},e.canChangeType=function(){return window.SourceBuffer&&window.SourceBuffer.prototype&&"function"==typeof window.SourceBuffer.prototype.changeType},t.canChangeType=function(){return this.constructor.canChangeType()},t.changeType=function(e,t){this.canChangeType()?Fl({type:e,sourceUpdater:this,action:ac(t),name:"changeType"}):tr.log.error("changeType is not supported!")},t.addOrChangeSourceBuffers=function(i){var n=this;if(!i||"object"!=typeof i||0===Object.keys(i).length)throw new Error("Cannot addOrChangeSourceBuffers to undefined codecs");Object.keys(i).forEach(function(e){var t=i[e];if(!n.hasCreatedSourceBuffers())return n.addSourceBuffer(e,t);n.canChangeType()&&n.changeType(e,t)})},t.appendBuffer=function(e,t){var i=this,n=e.segmentInfo,r=e.type,a=e.bytes;if(this.processedAppend_=!0,"audio"===r&&this.videoBuffer&&!this.videoAppendQueued_)return this.delayedAudioAppendQueue_.push([e,t]),void this.logger_("delayed audio append of "+a.length+" until video append");Fl({type:r,sourceUpdater:this,action:Ql(a,n||{mediaIndex:-1},t),doneFn:t,name:"appendBuffer"}),"video"===r&&(this.videoAppendQueued_=!0,this.delayedAudioAppendQueue_.length&&(r=this.delayedAudioAppendQueue_.slice(),this.logger_("queuing delayed audio "+r.length+" appendBuffers"),this.delayedAudioAppendQueue_.length=0,r.forEach(function(e){i.appendBuffer.apply(i,e)})))},t.audioBuffered=function(){return Bl(this.mediaSource,this.audioBuffer)&&this.audioBuffer.buffered||tr.createTimeRange()},t.videoBuffered=function(){return Bl(this.mediaSource,this.videoBuffer)&&this.videoBuffer.buffered||tr.createTimeRange()},t.buffered=function(){var e=Bl(this.mediaSource,this.videoBuffer)?this.videoBuffer:null,t=Bl(this.mediaSource,this.audioBuffer)?this.audioBuffer:null;return t&&!e?this.audioBuffered():e&&!t?this.videoBuffered():function(e,t){var i=null,n=null,r=0,a=[],s=[];if(!(e&&e.length&&t&&t.length))return tr.createTimeRange();for(var o=e.length;o--;)a.push({time:e.start(o),type:"start"}),a.push({time:e.end(o),type:"end"});for(o=t.length;o--;)a.push({time:t.start(o),type:"start"}),a.push({time:t.end(o),type:"end"});for(a.sort(function(e,t){return e.time-t.time}),o=0;o<a.length;o++)"start"===a[o].type?2===++r&&(i=a[o].time):"end"===a[o].type&&1===--r&&(n=a[o].time),null!==i&&null!==n&&(s.push([i,n]),n=i=null);return tr.createTimeRanges(s)}(this.audioBuffered(),this.videoBuffered())},t.setDuration=function(e,t){void 0===t&&(t=Ol),Fl({type:"mediaSource",sourceUpdater:this,action:tc(e),name:"duration",doneFn:t})},t.endOfStream=function(e,t){void 0===t&&(t=Ol),Fl({type:"mediaSource",sourceUpdater:this,action:ec(e="string"!=typeof(e=void 0===e?null:e)?void 0:e),name:"endOfStream",doneFn:t})},t.removeAudio=function(e,t,i){void 0===i&&(i=Ol),this.audioBuffered().length&&0!==this.audioBuffered().end(0)?Fl({type:"audio",sourceUpdater:this,action:$l(e,t),doneFn:i,name:"remove"}):i()},t.removeVideo=function(e,t,i){void 0===i&&(i=Ol),this.videoBuffered().length&&0!==this.videoBuffered().end(0)?Fl({type:"video",sourceUpdater:this,action:$l(e,t),doneFn:i,name:"remove"}):i()},t.updating=function(){return!(!Ml("audio",this)&&!Ml("video",this))},t.audioTimestampOffset=function(e){return"undefined"!=typeof e&&this.audioBuffer&&this.audioTimestampOffset_!==e&&(Fl({type:"audio",sourceUpdater:this,action:Jl(e),name:"timestampOffset"}),this.audioTimestampOffset_=e),this.audioTimestampOffset_},t.videoTimestampOffset=function(e){return"undefined"!=typeof e&&this.videoBuffer&&this.videoTimestampOffset!==e&&(Fl({type:"video",sourceUpdater:this,action:Jl(e),name:"timestampOffset"}),this.videoTimestampOffset_=e),this.videoTimestampOffset_},t.audioQueueCallback=function(e){this.audioBuffer&&Fl({type:"audio",sourceUpdater:this,action:Zl(e),name:"callback"})},t.videoQueueCallback=function(e){this.videoBuffer&&Fl({type:"video",sourceUpdater:this,action:Zl(e),name:"callback"})},t.dispose=function(){var t=this;this.trigger("dispose"),Yl.forEach(function(e){t.abort(e),t.canRemoveSourceBuffer()?t.removeSourceBuffer(e):t[e+"QueueCallback"](function(){return Ul(e,t)})}),this.videoAppendQueued_=!1,this.delayedAudioAppendQueue_.length=0,this.sourceopenListener_&&this.mediaSource.removeEventListener("sourceopen",this.sourceopenListener_),this.off()},e}(tr.EventTarget),oc=new Uint8Array("\n\n".split("").map(function(e){return e.charCodeAt(0)})),uc=function(i){function e(e,t){return(t=i.call(this,e,t=void 0===t?{}:t)||this).mediaSource_=null,t.subtitlesTrack_=null,t.loaderType_="subtitle",t.featuresNativeTextTracks_=e.featuresNativeTextTracks,t.shouldSaveSegmentTimingInfo_=!1,t}mt(e,i);var t=e.prototype;return t.createTransmuxer_=function(){return null},t.buffered_=function(){if(!this.subtitlesTrack_||!this.subtitlesTrack_.cues||!this.subtitlesTrack_.cues.length)return tr.createTimeRanges();var e=this.subtitlesTrack_.cues,t=e[0].startTime,e=e[e.length-1].startTime;return tr.createTimeRanges([[t,e]])},t.initSegmentForMap=function(e,t){if(void 0===t&&(t=!1),!e)return null;var i=bu(e),n=this.initSegments_[i];return t&&!n&&e.bytes&&(t=oc.byteLength+e.bytes.byteLength,(t=new Uint8Array(t)).set(e.bytes),t.set(oc,e.bytes.byteLength),this.initSegments_[i]=n={resolvedUri:e.resolvedUri,byterange:e.byterange,bytes:t}),n||e},t.couldBeginLoading_=function(){return this.playlist_&&this.subtitlesTrack_&&!this.paused()},t.init_=function(){return this.state="READY",this.resetEverything(),this.monitorBuffer_()},t.track=function(e){return"undefined"==typeof e||(this.subtitlesTrack_=e,"INIT"===this.state&&this.couldBeginLoading_()&&this.init_()),this.subtitlesTrack_},t.remove=function(e,t){il(e,t,this.subtitlesTrack_)},t.fillBuffer_=function(){var e=this,t=this.chooseNextRequest_();if(t){if(null===this.syncController_.timestampOffsetForTimeline(t.timeline))return this.syncController_.one("timestampoffset",function(){e.state="READY",e.paused()||e.monitorBuffer_()}),void(this.state="WAITING_ON_TIMELINE");this.loadSegment_(t)}},t.timestampOffsetForSegment_=function(){return null},t.chooseNextRequest_=function(){return this.skipEmptySegments_(i.prototype.chooseNextRequest_.call(this))},t.skipEmptySegments_=function(e){for(;e&&e.segment.empty;){if(e.mediaIndex+1>=e.playlist.segments.length){e=null;break}e=this.generateSegmentInfo_({playlist:e.playlist,mediaIndex:e.mediaIndex+1,startOfSegment:e.startOfSegment+e.duration,isSyncRequest:e.isSyncRequest})}return e},t.stopForError=function(e){this.error(e),this.state="READY",this.pause(),this.trigger("error")},t.segmentRequestFinished_=function(e,t,i){var n=this;if(this.subtitlesTrack_){if(this.saveTransferStats_(t.stats),!this.pendingSegment_)return this.state="READY",void(this.mediaRequestsAborted+=1);if(e)return e.code===xl&&this.handleTimeout_(),e.code===Al?this.mediaRequestsAborted+=1:this.mediaRequestsErrored+=1,void this.stopForError(e);var r=this.pendingSegment_;this.saveBandwidthRelatedStats_(r.duration,t.stats),this.state="APPENDING",this.trigger("appending");var a=r.segment;if(a.map&&(a.map.bytes=t.map.bytes),r.bytes=t.bytes,"function"!=typeof window.WebVTT&&this.subtitlesTrack_&&this.subtitlesTrack_.tech_){var s=function(){n.subtitlesTrack_.tech_.off("vttjsloaded",o),n.stopForError({message:"Error loading vtt.js"})},o=function(){n.subtitlesTrack_.tech_.off("vttjserror",s),n.segmentRequestFinished_(e,t,i)};return this.state="WAITING_ON_VTTJS",this.subtitlesTrack_.tech_.one("vttjsloaded",o),void this.subtitlesTrack_.tech_.one("vttjserror",s)}a.requested=!0;try{this.parseVTTCues_(r)}catch(e){return void this.stopForError({message:e.message})}if(this.updateTimeMapping_(r,this.syncController_.timelines[r.timeline],this.playlist_),r.cues.length?r.timingInfo={start:r.cues[0].startTime,end:r.cues[r.cues.length-1].endTime}:r.timingInfo={start:r.startOfSegment,end:r.startOfSegment+r.duration},r.isSyncRequest)return this.trigger("syncinfoupdate"),this.pendingSegment_=null,void(this.state="READY");r.byteLength=r.bytes.byteLength,this.mediaSecondsLoaded+=a.duration,r.cues.forEach(function(e){n.subtitlesTrack_.addCue(n.featuresNativeTextTracks_?new window.VTTCue(e.startTime,e.endTime,e.text):e)}),function(t){var e=t.cues;if(e)for(var i=0;i<e.length;i++){for(var n=[],r=0,a=0;a<e.length;a++)e[i].startTime===e[a].startTime&&e[i].endTime===e[a].endTime&&e[i].text===e[a].text&&1<++r&&n.push(e[a]);n.length&&n.forEach(function(e){return t.removeCue(e)})}}(this.subtitlesTrack_),this.handleAppendsDone_()}else this.state="READY"},t.handleData_=function(){},t.updateTimingInfoEnd_=function(){},t.parseVTTCues_=function(t){var e=!1;"function"==typeof window.TextDecoder?i=new window.TextDecoder("utf8"):(i=window.WebVTT.StringDecoder(),e=!0);var i=new window.WebVTT.Parser(window,window.vttjs,i);t.cues=[],t.timestampmap={MPEGTS:0,LOCAL:0},i.oncue=t.cues.push.bind(t.cues),i.ontimestampmap=function(e){t.timestampmap=e},i.onparsingerror=function(e){tr.log.warn("Error encountered when parsing cues: "+e.message)},t.segment.map&&(n=t.segment.map.bytes,e&&(n=Hl(n)),i.parse(n));var n=t.bytes;e&&(n=Hl(n)),i.parse(n),i.flush()},t.updateTimeMapping_=function(e,t,i){var n,r,a=e.segment;t&&(e.cues.length?(r=e.timestampmap,n=r.MPEGTS/cl-r.LOCAL+t.mapping,e.cues.forEach(function(e){e.startTime+=n,e.endTime+=n}),i.syncInfo||(r=e.cues[0].startTime,t=e.cues[e.cues.length-1].startTime,i.syncInfo={mediaSequence:i.mediaSequence+e.mediaIndex,time:Math.min(r,t-a.duration)})):a.empty=!0)},e}(Dl),lc=[{name:"VOD",run:function(e,t,i,n,r){if(i===1/0)return null;return{time:0,segmentIndex:0,partIndex:null}}},{name:"ProgramDateTime",run:function(e,t,i,n,r){if(!Object.keys(e.timelineToDatetimeMappings).length)return null;var a=null,s=null,o=qo(t);r=r||0;for(var u=0;u<o.length;u++){var l=o[t.endList||0===r?u:o.length-(u+1)],c=l.segment,d=e.timelineToDatetimeMappings[c.timeline];if(d&&c.dateTimeObject){var h=c.dateTimeObject.getTime()/1e3+d;if(c.parts&&"number"==typeof l.partIndex)for(var p=0;p<l.partIndex;p++)h+=c.parts[p].duration;d=Math.abs(r-h);if(null!==s&&(0===d||s<d))break;s=d,a={time:h,segmentIndex:l.segmentIndex,partIndex:l.partIndex}}}return a}},{name:"Segment",run:function(e,t,i,n,r){var a=null,s=null;r=r||0;for(var o=qo(t),u=0;u<o.length;u++){var l=o[t.endList||0===r?u:o.length-(u+1)],c=l.segment,d=l.part&&l.part.start||c&&c.start;if(c.timeline===n&&"undefined"!=typeof d){c=Math.abs(r-d);if(null!==s&&s<c)break;(!a||null===s||c<=s)&&(s=c,a={time:d,segmentIndex:l.segmentIndex,partIndex:l.partIndex})}}return a}},{name:"Discontinuity",run:function(e,t,i,n,r){var a=null;if(r=r||0,t.discontinuityStarts&&t.discontinuityStarts.length)for(var s=null,o=0;o<t.discontinuityStarts.length;o++){var u=t.discontinuityStarts[o],l=t.discontinuitySequence+o+1,c=e.discontinuities[l];if(c){l=Math.abs(r-c.time);if(null!==s&&s<l)break;(!a||null===s||l<=s)&&(s=l,a={time:c.time,segmentIndex:u,partIndex:null})}}return a}},{name:"Playlist",run:function(e,t,i,n,r){return t.syncInfo?{time:t.syncInfo.time,segmentIndex:t.syncInfo.mediaSequence-t.mediaSequence,partIndex:null}:null}}],cc=function(i){function e(e){var t=i.call(this)||this;return t.timelines=[],t.discontinuities=[],t.timelineToDatetimeMappings={},t.logger_=Oo("SyncController"),t}mt(e,i);var t=e.prototype;return t.getSyncPoint=function(e,t,i,n){i=this.runStrategies_(e,t,i,n);return i.length?this.selectSyncPoint_(i,{key:"time",value:n}):null},t.getExpiredTime=function(e,t){if(!e||!e.segments)return null;t=this.runStrategies_(e,t,e.discontinuitySequence,0);if(!t.length)return null;t=this.selectSyncPoint_(t,{key:"segmentIndex",value:0});return 0<t.segmentIndex&&(t.time*=-1),Math.abs(t.time+Ko({defaultDuration:e.targetDuration,durationList:e.segments,startIndex:t.segmentIndex,endIndex:0}))},t.runStrategies_=function(e,t,i,n){for(var r=[],a=0;a<lc.length;a++){var s=lc[a],o=s.run(this,e,t,i,n);o&&(o.strategy=s.name,r.push({strategy:s.name,syncPoint:o}))}return r},t.selectSyncPoint_=function(e,t){for(var i=e[0].syncPoint,n=Math.abs(e[0].syncPoint[t.key]-t.value),r=e[0].strategy,a=1;a<e.length;a++){var s=Math.abs(e[a].syncPoint[t.key]-t.value);s<n&&(n=s,i=e[a].syncPoint,r=e[a].strategy)}return this.logger_("syncPoint for ["+t.key+": "+t.value+"] chosen with strategy ["+r+"]: [time:"+i.time+", segmentIndex:"+i.segmentIndex+("number"==typeof i.partIndex?",partIndex:"+i.partIndex:"")+"]"),i},t.saveExpiredSegmentInfo=function(e,t){var i=t.mediaSequence-e.mediaSequence;if(86400<i)tr.log.warn("Not saving expired segment info. Media sequence gap "+i+" is too large.");else for(var n=i-1;0<=n;n--){var r=e.segments[n];if(r&&"undefined"!=typeof r.start){t.syncInfo={mediaSequence:e.mediaSequence+n,time:r.start},this.logger_("playlist refresh sync: [time:"+t.syncInfo.time+", mediaSequence: "+t.syncInfo.mediaSequence+"]"),this.trigger("syncinfoupdate");break}}},t.setDateTimeMappingForStart=function(e){var t;this.timelineToDatetimeMappings={},e.segments&&e.segments.length&&e.segments[0].dateTimeObject&&(e=(t=e.segments[0]).dateTimeObject.getTime()/1e3,this.timelineToDatetimeMappings[t.timeline]=-e)},t.saveSegmentTimingInfo=function(e){var t=e.segmentInfo,i=e.shouldSaveTimelineMapping,n=this.calculateSegmentTimeMapping_(t,t.timingInfo,i),e=t.segment;n&&(this.saveDiscontinuitySyncInfo_(t),t.playlist.syncInfo||(t.playlist.syncInfo={mediaSequence:t.playlist.mediaSequence+t.mediaIndex,time:e.start}));t=e.dateTimeObject;e.discontinuity&&i&&t&&(this.timelineToDatetimeMappings[e.timeline]=-t.getTime()/1e3)},t.timestampOffsetForTimeline=function(e){return"undefined"==typeof this.timelines[e]?null:this.timelines[e].time},t.mappingForTimeline=function(e){return"undefined"==typeof this.timelines[e]?null:this.timelines[e].mapping},t.calculateSegmentTimeMapping_=function(e,t,i){var n,r,a=e.segment,s=e.part,o=this.timelines[e.timeline];if("number"==typeof e.timestampOffset)o={time:e.startOfSegment,mapping:e.startOfSegment-t.start},i&&(this.timelines[e.timeline]=o,this.trigger("timestampoffset"),this.logger_("time mapping for timeline "+e.timeline+": [time: "+o.time+"] [mapping: 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e=t.call(this)||this;return e.pendingTimelineChanges_={},e.lastTimelineChanges_={},e}mt(e,t);var i=e.prototype;return i.clearPendingTimelineChange=function(e){this.pendingTimelineChanges_[e]=null,this.trigger("pendingtimelinechange")},i.pendingTimelineChange=function(e){var t=e.type,i=e.from,e=e.to;return"number"==typeof i&&"number"==typeof e&&(this.pendingTimelineChanges_[t]={type:t,from:i,to:e},this.trigger("pendingtimelinechange")),this.pendingTimelineChanges_[t]},i.lastTimelineChange=function(e){var t=e.type,i=e.from,e=e.to;return"number"==typeof i&&"number"==typeof e&&(this.lastTimelineChanges_[t]={type:t,from:i,to:e},delete this.pendingTimelineChanges_[t],this.trigger("timelinechange")),this.lastTimelineChanges_[t]},i.dispose=function(){this.trigger("dispose"),this.pendingTimelineChanges_={},this.lastTimelineChanges_={},this.off()},e}(tr.EventTarget),hc=x(U(W(function(){function e(e,t,i){return e(i={path:t,exports:{},require:function(e,t){return function(){throw new 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t.on=function(e,t){this.listeners[e]||(this.listeners[e]=[]),this.listeners[e].push(t)},t.off=function(e,t){if(!this.listeners[e])return!1;t=this.listeners[e].indexOf(t);return this.listeners[e]=this.listeners[e].slice(0),this.listeners[e].splice(t,1),-1<t},t.trigger=function(e){var t=this.listeners[e];if(t)if(2===arguments.length)for(var i=t.length,n=0;n<i;++n)t[n].call(this,arguments[1]);else for(var r=Array.prototype.slice.call(arguments,1),a=t.length,s=0;s<a;++s)t[s].apply(this,r)},t.dispose=function(){this.listeners={}},t.pipe=function(t){this.on("data",function(e){t.push(e)})},e}();
 /*! @name aes-decrypter @version 3.1.2 @license Apache-2.0 */
 var c=null,m=function(){function e(e){var t,i,n;c=c||function(){for(var e,t,i,n,r,a,s,o=[[[],[],[],[],[]],[[],[],[],[],[]]],u=o[0],l=o[1],c=u[4],d=l[4],h=[],p=[],f=0;f<256;f++)p[(h[f]=f<<1^283*(f>>7))^f]=f;for(e=t=0;!c[e];e^=i||1,t=p[t]||1)for(s=16843009*h[n=h[i=h[d[c[e]=r=(r=t^t<<1^t<<2^t<<3^t<<4)>>8^255&r^99]=e]]]^65537*n^257*i^16843008*e,a=257*h[r]^16843008*r,f=0;f<4;f++)u[f][e]=a=a<<24^a>>>8,l[f][r]=s=s<<24^s>>>8;for(f=0;f<5;f++)u[f]=u[f].slice(0),l[f]=l[f].slice(0);return o}(),this._tables=[[c[0][0].slice(),c[0][1].slice(),c[0][2].slice(),c[0][3].slice(),c[0][4].slice()],[c[1][0].slice(),c[1][1].slice(),c[1][2].slice(),c[1][3].slice(),c[1][4].slice()]];var r=this._tables[0][4],a=this._tables[1],s=e.length,o=1;if(4!==s&&6!==s&&8!==s)throw new Error("Invalid aes key size");var u=e.slice(0),l=[];for(this._key=[u,l],t=s;t<4*s+28;t++)n=u[t-1],(t%s==0||8===s&&t%s==4)&&(n=r[n>>>24]<<24^r[n>>16&255]<<16^r[n>>8&255]<<8^r[255&n],t%s==0&&(n=n<<8^n>>>24^o<<24,o=o<<1^283*(o>>7))),u[t]=u[t-s]^n;for(i=0;t;i++,t--)n=u[3&i?t:t-4],l[i]=t<=4||i<4?n:a[0][r[n>>>24]]^a[1][r[n>>16&255]]^a[2][r[n>>8&255]]^a[3][r[255&n]]}return e.prototype.decrypt=function(e,t,i,n,r,a){for(var s,o,u,l=this._key[1],c=e^l[0],d=n^l[1],h=i^l[2],p=t^l[3],f=l.length/4-2,m=4,t=this._tables[1],g=t[0],y=t[1],v=t[2],_=t[3],b=t[4],T=0;T<f;T++)s=g[c>>>24]^y[d>>16&255]^v[h>>8&255]^_[255&p]^l[m],o=g[d>>>24]^y[h>>16&255]^v[p>>8&255]^_[255&c]^l[m+1],u=g[h>>>24]^y[p>>16&255]^v[c>>8&255]^_[255&d]^l[m+2],p=g[p>>>24]^y[c>>16&255]^v[d>>8&255]^_[255&h]^l[m+3],m+=4,c=s,d=o,h=u;for(T=0;T<4;T++)r[(3&-T)+a]=b[c>>>24]<<24^b[d>>16&255]<<16^b[h>>8&255]<<8^b[255&p]^l[m++],s=c,c=d,d=h,h=p,p=s},e}(),l=function(t){function e(){var e=t.call(this,r)||this;return e.jobs=[],e.delay=1,e.timeout_=null,e}n(e,t);var i=e.prototype;return i.processJob_=function(){this.jobs.shift()(),this.jobs.length?this.timeout_=setTimeout(this.processJob_.bind(this),this.delay):this.timeout_=null},i.push=function(e){this.jobs.push(e),this.timeout_||(this.timeout_=setTimeout(this.processJob_.bind(this),this.delay))},e}(r),g=function(e){return e<<24|(65280&e)<<8|(16711680&e)>>8|e>>>24},a=function(){function u(e,t,i,n){var r=u.STEP,a=new Int32Array(e.buffer),s=new Uint8Array(e.byteLength),o=0;for(this.asyncStream_=new l,this.asyncStream_.push(this.decryptChunk_(a.subarray(o,o+r),t,i,s)),o=r;o<a.length;o+=r)i=new Uint32Array([g(a[o-4]),g(a[o-3]),g(a[o-2]),g(a[o-1])]),this.asyncStream_.push(this.decryptChunk_(a.subarray(o,o+r),t,i,s));this.asyncStream_.push(function(){
 /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */
 var e;n(null,(e=s).subarray(0,e.byteLength-e[e.byteLength-1]))})}return u.prototype.decryptChunk_=function(t,i,n,r){return function(){var e=function(e,t,i){for(var n,r,a,s,o=new Int32Array(e.buffer,e.byteOffset,e.byteLength>>2),u=new m(Array.prototype.slice.call(t)),e=new Uint8Array(e.byteLength),l=new Int32Array(e.buffer),c=i[0],d=i[1],h=i[2],p=i[3],f=0;f<o.length;f+=4)n=g(o[f]),r=g(o[f+1]),a=g(o[f+2]),s=g(o[f+3]),u.decrypt(n,r,a,s,l,f),l[f]=g(l[f]^c),l[f+1]=g(l[f+1]^d),l[f+2]=g(l[f+2]^h),l[f+3]=g(l[f+3]^p),c=n,d=r,h=a,p=s;return e}(t,i,n);r.set(e,t.byteOffset)}},t(u,null,[{key:"STEP",get:function(){return 32e3}}]),u}();self.onmessage=function(e){var r=e.data,t=new Uint8Array(r.encrypted.bytes,r.encrypted.byteOffset,r.encrypted.byteLength),i=new Uint32Array(r.key.bytes,r.key.byteOffset,r.key.byteLength/4),e=new Uint32Array(r.iv.bytes,r.iv.byteOffset,r.iv.byteLength/4);new a(t,i,e,function(e,t){var i,n;self.postMessage((i={source:r.source,decrypted:t},n={},Object.keys(i).forEach(function(e){var t=i[e];ArrayBuffer.isView(t)?n[e]={bytes:t.buffer,byteOffset:t.byteOffset,byteLength:t.byteLength}:n[e]=t}),n),[t.buffer])})}}))),pc={AUDIO:function(s,o){return function(){var e=o.segmentLoaders[s],t=o.mediaTypes[s],i=o.blacklistCurrentPlaylist;ql(e,t);var n=t.activeTrack(),e=t.activeGroup(),e=(e.filter(function(e){return e.default})[0]||e[0]).id,r=t.tracks[e];if(n!==r){for(var a in tr.log.warn("Problem encountered loading the alternate audio track.Switching back to default."),t.tracks)t.tracks[a].enabled=t.tracks[a]===r;t.onTrackChanged()}else i({message:"Problem encountered loading the default audio track."})}},SUBTITLES:function(i,n){return function(){var e=n.segmentLoaders[i],t=n.mediaTypes[i];tr.log.warn("Problem encountered loading the subtitle track.Disabling subtitle track."),ql(e,t);e=t.activeTrack();e&&(e.mode="disabled"),t.onTrackChanged()}}},fc={AUDIO:function(e,t,i){var n,r,a;t&&(n=i.tech,r=i.requestOptions,a=i.segmentLoaders[e],t.on("loadedmetadata",function(){var e=t.media();a.playlist(e,r),(!n.paused()||e.endList&&"none"!==n.preload())&&a.load()}),t.on("loadedplaylist",function(){a.playlist(t.media(),r),n.paused()||a.load()}),t.on("error",pc[e](e,i)))},SUBTITLES:function(e,t,i){var n=i.tech,r=i.requestOptions,a=i.segmentLoaders[e],s=i.mediaTypes[e];t.on("loadedmetadata",function(){var e=t.media();a.playlist(e,r),a.track(s.activeTrack()),(!n.paused()||e.endList&&"none"!==n.preload())&&a.load()}),t.on("loadedplaylist",function(){a.playlist(t.media(),r),n.paused()||a.load()}),t.on("error",pc[e](e,i))}},mc={AUDIO:function(e,t){var i,n,r=t.vhs,a=t.sourceType,s=t.segmentLoaders[e],o=t.requestOptions,u=t.master.mediaGroups,l=t.mediaTypes[e],c=l.groups,d=l.tracks,h=l.logger_,p=t.masterPlaylistLoader,f=nu(p.master);for(i in u[e]&&0!==Object.keys(u[e]).length||(u[e]={main:{default:{default:!0}}},f&&(u[e].main.default.playlists=p.master.playlists)),u[e])for(var m in c[i]||(c[i]=[]),u[e][i]){var g=u[e][i][m],y=void 0,y=f?(h("AUDIO group '"+i+"' label '"+m+"' is a master playlist"),g.isMasterPlaylist=!0,null):"vhs-json"===a&&g.playlists?new yl(g.playlists[0],r,o):g.resolvedUri?new yl(g.resolvedUri,r,o):g.playlists&&"dash"===a?new Tl(g.playlists[0],r,o,p):null,g=tr.mergeOptions({id:m,playlistLoader:y},g);fc[e](e,g.playlistLoader,t),c[i].push(g),"undefined"==typeof d[m]&&(g=new tr.AudioTrack({id:m,kind:(n=void 0,n=(y=g).default?"main":"alternative",n=y.characteristics&&0<=y.characteristics.indexOf("public.accessibility.describes-video")?"main-desc":n),enabled:!1,language:g.language,default:g.default,label:m}),d[m]=g)}s.on("error",pc[e](e,t))},SUBTITLES:function(e,t){var i,n=t.tech,r=t.vhs,a=t.sourceType,s=t.segmentLoaders[e],o=t.requestOptions,u=t.master.mediaGroups,l=t.mediaTypes[e],c=l.groups,d=l.tracks,h=t.masterPlaylistLoader;for(i in u[e])for(var p in c[i]||(c[i]=[]),u[e][i])if(!u[e][i][p].forced){var f=u[e][i][p],m=void 0;if("hls"===a)m=new yl(f.resolvedUri,r,o);else if("dash"===a){if(!f.playlists.filter(function(e){return e.excludeUntil!==1/0}).length)return;m=new Tl(f.playlists[0],r,o,h)}else"vhs-json"===a&&(m=new yl(f.playlists?f.playlists[0]:f.resolvedUri,r,o));f=tr.mergeOptions({id:p,playlistLoader:m},f),fc[e](e,f.playlistLoader,t),c[i].push(f),"undefined"==typeof d[p]&&(f=n.addRemoteTextTrack({id:p,kind:"subtitles",default:f.default&&f.autoselect,language:f.language,label:p},!1).track,d[p]=f)}s.on("error",pc[e](e,t))},"CLOSED-CAPTIONS":function(e,t){var i,n=t.tech,r=t.master.mediaGroups,t=t.mediaTypes[e],a=t.groups,s=t.tracks;for(i in r[e])for(var o in a[i]||(a[i]=[]),r[e][i]){var u,l,c=r[e][i][o];/^(?:CC|SERVICE)/.test(c.instreamId)&&(void 0===(l=(u=n.options_.vhs&&n.options_.vhs.captionServices||{})[(l={label:o,language:c.language,instreamId:c.instreamId,default:c.default&&c.autoselect}).instreamId]?tr.mergeOptions(l,u[l.instreamId]):l).default&&delete l.default,a[i].push(tr.mergeOptions({id:o},c)),"undefined"==typeof s[o]&&(l=n.addRemoteTextTrack({id:l.instreamId,kind:"captions",default:l.default,language:l.language,label:l.label},!1).track,s[o]=l))}}},gc={AUDIO:function(i,n){return function(){var e,t=n.mediaTypes[i].tracks;for(e in t)if(t[e].enabled)return t[e];return null}},SUBTITLES:function(i,n){return function(){var e,t=n.mediaTypes[i].tracks;for(e in t)if("showing"===t[e].mode||"hidden"===t[e].mode)return t[e];return null}}},yc=["mediaRequests","mediaRequestsAborted","mediaRequestsTimedout","mediaRequestsErrored","mediaTransferDuration","mediaBytesTransferred","mediaAppends"],vc=function(v){function e(e){var t=v.call(this)||this,i=e.src,n=e.handleManifestRedirects,r=e.withCredentials,a=e.tech,s=e.bandwidth,o=e.externVhs,u=e.useCueTags,l=e.blacklistDuration,c=e.enableLowInitialPlaylist,d=e.sourceType,h=e.cacheEncryptionKeys,p=e.experimentalBufferBasedABR,f=e.experimentalLeastPixelDiffSelector,m=e.captionServices;if(!i)throw new Error("A non-empty playlist URL or JSON manifest string is required");var g,y=e.maxPlaylistRetries;null!==y&&"undefined"!=typeof y||(y=1/0),Kl=o,t.experimentalBufferBasedABR=Boolean(p),t.experimentalLeastPixelDiffSelector=Boolean(f),t.withCredentials=r,t.tech_=a,t.vhs_=a.vhs,t.sourceType_=d,t.useCueTags_=u,t.blacklistDuration=l,t.maxPlaylistRetries=y,t.enableLowInitialPlaylist=c,t.useCueTags_&&(t.cueTagsTrack_=t.tech_.addTextTrack("metadata","ad-cues"),t.cueTagsTrack_.inBandMetadataTrackDispatchType=""),t.requestOptions_={withCredentials:r,handleManifestRedirects:n,maxPlaylistRetries:y,timeout:null},t.on("error",t.pauseLoading),t.mediaTypes_=(g={},["AUDIO","SUBTITLES","CLOSED-CAPTIONS"].forEach(function(e){g[e]={groups:{},tracks:{},activePlaylistLoader:null,activeGroup:Ol,activeTrack:Ol,getActiveGroup:Ol,onGroupChanged:Ol,onTrackChanged:Ol,lastTrack_:null,logger_:Oo("MediaGroups["+e+"]")}}),g),t.mediaSource=new window.MediaSource,t.handleDurationChange_=t.handleDurationChange_.bind(ft(t)),t.handleSourceOpen_=t.handleSourceOpen_.bind(ft(t)),t.handleSourceEnded_=t.handleSourceEnded_.bind(ft(t)),t.mediaSource.addEventListener("durationchange",t.handleDurationChange_),t.mediaSource.addEventListener("sourceopen",t.handleSourceOpen_),t.mediaSource.addEventListener("sourceended",t.handleSourceEnded_),t.seekable_=tr.createTimeRanges(),t.hasPlayed_=!1,t.syncController_=new cc(e),t.segmentMetadataTrack_=a.addRemoteTextTrack({kind:"metadata",label:"segment-metadata"},!1).track,t.decrypter_=new hc,t.sourceUpdater_=new sc(t.mediaSource),t.inbandTextTracks_={},t.timelineChangeController_=new dc;h={vhs:t.vhs_,parse708captions:e.parse708captions,captionServices:m,mediaSource:t.mediaSource,currentTime:t.tech_.currentTime.bind(t.tech_),seekable:function(){return t.seekable()},seeking:function(){return t.tech_.seeking()},duration:function(){return t.duration()},hasPlayed:function(){return t.hasPlayed_},goalBufferLength:function(){return t.goalBufferLength()},bandwidth:s,syncController:t.syncController_,decrypter:t.decrypter_,sourceType:t.sourceType_,inbandTextTracks:t.inbandTextTracks_,cacheEncryptionKeys:h,sourceUpdater:t.sourceUpdater_,timelineChangeController:t.timelineChangeController_,experimentalExactManifestTimings:e.experimentalExactManifestTimings};t.masterPlaylistLoader_=new("dash"===t.sourceType_?Tl:yl)(i,t.vhs_,t.requestOptions_),t.setupMasterPlaylistLoaderListeners_(),t.mainSegmentLoader_=new Dl(tr.mergeOptions(h,{segmentMetadataTrack:t.segmentMetadataTrack_,loaderType:"main"}),e),t.audioSegmentLoader_=new Dl(tr.mergeOptions(h,{loaderType:"audio"}),e),t.subtitleSegmentLoader_=new uc(tr.mergeOptions(h,{loaderType:"vtt",featuresNativeTextTracks:t.tech_.featuresNativeTextTracks}),e),t.setupSegmentLoaderListeners_(),t.experimentalBufferBasedABR&&(t.masterPlaylistLoader_.one("loadedplaylist",function(){return t.startABRTimer_()}),t.tech_.on("pause",function(){return t.stopABRTimer_()}),t.tech_.on("play",function(){return t.startABRTimer_()})),yc.forEach(function(e){t[e+"_"]=function(e){return this.audioSegmentLoader_[e]+this.mainSegmentLoader_[e]}.bind(ft(t),e)}),t.logger_=Oo("MPC"),t.triggeredFmp4Usage=!1,"none"===t.tech_.preload()?(t.loadOnPlay_=function(){t.loadOnPlay_=null,t.masterPlaylistLoader_.load()},t.tech_.one("play",t.loadOnPlay_)):t.masterPlaylistLoader_.load(),t.timeToLoadedData__=-1,t.mainAppendsToLoadedData__=-1,t.audioAppendsToLoadedData__=-1;e="none"===t.tech_.preload()?"play":"loadstart";return t.tech_.one(e,function(){var e=Date.now();t.tech_.one("loadeddata",function(){t.timeToLoadedData__=Date.now()-e,t.mainAppendsToLoadedData__=t.mainSegmentLoader_.mediaAppends,t.audioAppendsToLoadedData__=t.audioSegmentLoader_.mediaAppends})}),t}mt(e,v);var t=e.prototype;return t.mainAppendsToLoadedData_=function(){return this.mainAppendsToLoadedData__},t.audioAppendsToLoadedData_=function(){return this.audioAppendsToLoadedData__},t.appendsToLoadedData_=function(){var e=this.mainAppendsToLoadedData_(),t=this.audioAppendsToLoadedData_();return-1===e||-1===t?-1:e+t},t.timeToLoadedData_=function(){return this.timeToLoadedData__},t.checkABR_=function(){var e=this.selectPlaylist();e&&this.shouldSwitchToMedia_(e)&&this.switchMedia_(e,"abr")},t.switchMedia_=function(e,t,i){var n=this.media(),r=n&&(n.id||n.uri),n=e.id||e.uri;r&&r!==n&&(this.logger_("switch media "+r+" -> "+n+" from "+t),this.tech_.trigger({type:"usage",name:"vhs-rendition-change-"+t})),this.masterPlaylistLoader_.media(e,i)},t.startABRTimer_=function(){var e=this;this.stopABRTimer_(),this.abrTimer_=window.setInterval(function(){return e.checkABR_()},250)},t.stopABRTimer_=function(){this.tech_.scrubbing&&this.tech_.scrubbing()||(window.clearInterval(this.abrTimer_),this.abrTimer_=null)},t.getAudioTrackPlaylists_=function(){var e=this.master(),t=e&&e.playlists||[];if(!e||!e.mediaGroups||!e.mediaGroups.AUDIO)return t;var i,n=e.mediaGroups.AUDIO,r=Object.keys(n);if(Object.keys(this.mediaTypes_.AUDIO.groups).length)i=this.mediaTypes_.AUDIO.activeTrack();else{var a,s=n.main||r.length&&n[r[0]];for(a in s)if(s[a].default){i={label:a};break}}if(!i)return t;var o,u=[];for(o in n)if(n[o][i.label]){var l=n[o][i.label];if(l.playlists&&l.playlists.length)u.push.apply(u,l.playlists);else if(l.uri)u.push(l);else if(e.playlists.length)for(var c=0;c<e.playlists.length;c++){var d=e.playlists[c];d.attributes&&d.attributes.AUDIO&&d.attributes.AUDIO===o&&u.push(d)}}return u.length?u:t},t.setupMasterPlaylistLoaderListeners_=function(){var i=this;this.masterPlaylistLoader_.on("loadedmetadata",function(){var e=i.masterPlaylistLoader_.media(),t=1.5*e.targetDuration*1e3;eu(i.masterPlaylistLoader_.master,i.masterPlaylistLoader_.media())?i.requestOptions_.timeout=0:i.requestOptions_.timeout=t,e.endList&&"none"!==i.tech_.preload()&&(i.mainSegmentLoader_.playlist(e,i.requestOptions_),i.mainSegmentLoader_.load()),Gl({sourceType:i.sourceType_,segmentLoaders:{AUDIO:i.audioSegmentLoader_,SUBTITLES:i.subtitleSegmentLoader_,main:i.mainSegmentLoader_},tech:i.tech_,requestOptions:i.requestOptions_,masterPlaylistLoader:i.masterPlaylistLoader_,vhs:i.vhs_,master:i.master(),mediaTypes:i.mediaTypes_,blacklistCurrentPlaylist:i.blacklistCurrentPlaylist.bind(i)}),i.triggerPresenceUsage_(i.master(),e),i.setupFirstPlay(),!i.mediaTypes_.AUDIO.activePlaylistLoader||i.mediaTypes_.AUDIO.activePlaylistLoader.media()?i.trigger("selectedinitialmedia"):i.mediaTypes_.AUDIO.activePlaylistLoader.one("loadedmetadata",function(){i.trigger("selectedinitialmedia")})}),this.masterPlaylistLoader_.on("loadedplaylist",function(){i.loadOnPlay_&&i.tech_.off("play",i.loadOnPlay_);var e,t=i.masterPlaylistLoader_.media();if(!t){if(i.excludeUnsupportedVariants_(),!(e=(e=i.enableLowInitialPlaylist?i.selectInitialPlaylist():e)||i.selectPlaylist())||!i.shouldSwitchToMedia_(e))return;if(i.initialMedia_=e,i.switchMedia_(i.initialMedia_,"initial"),!("vhs-json"===i.sourceType_&&i.initialMedia_.segments))return;t=i.initialMedia_}i.handleUpdatedMediaPlaylist(t)}),this.masterPlaylistLoader_.on("error",function(){i.blacklistCurrentPlaylist(i.masterPlaylistLoader_.error)}),this.masterPlaylistLoader_.on("mediachanging",function(){i.mainSegmentLoader_.abort(),i.mainSegmentLoader_.pause()}),this.masterPlaylistLoader_.on("mediachange",function(){var e=i.masterPlaylistLoader_.media(),t=1.5*e.targetDuration*1e3;eu(i.masterPlaylistLoader_.master,i.masterPlaylistLoader_.media())?i.requestOptions_.timeout=0:i.requestOptions_.timeout=t,i.mainSegmentLoader_.playlist(e,i.requestOptions_),i.mainSegmentLoader_.load(),i.tech_.trigger({type:"mediachange",bubbles:!0})}),this.masterPlaylistLoader_.on("playlistunchanged",function(){var e=i.masterPlaylistLoader_.media();"playlist-unchanged"!==e.lastExcludeReason_&&i.stuckAtPlaylistEnd_(e)&&(i.blacklistCurrentPlaylist({message:"Playlist no longer updating.",reason:"playlist-unchanged"}),i.tech_.trigger("playliststuck"))}),this.masterPlaylistLoader_.on("renditiondisabled",function(){i.tech_.trigger({type:"usage",name:"vhs-rendition-disabled"}),i.tech_.trigger({type:"usage",name:"hls-rendition-disabled"})}),this.masterPlaylistLoader_.on("renditionenabled",function(){i.tech_.trigger({type:"usage",name:"vhs-rendition-enabled"}),i.tech_.trigger({type:"usage",name:"hls-rendition-enabled"})})},t.handleUpdatedMediaPlaylist=function(e){this.useCueTags_&&this.updateAdCues_(e),this.mainSegmentLoader_.playlist(e,this.requestOptions_),this.updateDuration(!e.endList),this.tech_.paused()||(this.mainSegmentLoader_.load(),this.audioSegmentLoader_&&this.audioSegmentLoader_.load())},t.triggerPresenceUsage_=function(e,t){var i,n=e.mediaGroups||{},r=!0,e=Object.keys(n.AUDIO);for(i in n.AUDIO)for(var a in n.AUDIO[i])n.AUDIO[i][a].uri||(r=!1);r&&(this.tech_.trigger({type:"usage",name:"vhs-demuxed"}),this.tech_.trigger({type:"usage",name:"hls-demuxed"})),Object.keys(n.SUBTITLES).length&&(this.tech_.trigger({type:"usage",name:"vhs-webvtt"}),this.tech_.trigger({type:"usage",name:"hls-webvtt"})),Kl.Playlist.isAes(t)&&(this.tech_.trigger({type:"usage",name:"vhs-aes"}),this.tech_.trigger({type:"usage",name:"hls-aes"})),e.length&&1<Object.keys(n.AUDIO[e[0]]).length&&(this.tech_.trigger({type:"usage",name:"vhs-alternate-audio"}),this.tech_.trigger({type:"usage",name:"hls-alternate-audio"})),this.useCueTags_&&(this.tech_.trigger({type:"usage",name:"vhs-playlist-cue-tags"}),this.tech_.trigger({type:"usage",name:"hls-playlist-cue-tags"}))},t.shouldSwitchToMedia_=function(e){var t=this.masterPlaylistLoader_.media()||this.masterPlaylistLoader_.pendingMedia_,i=this.tech_.currentTime(),n=this.bufferLowWaterLine(),r=this.bufferHighWaterLine();return function(e){var t=e.currentPlaylist,i=e.buffered,n=e.currentTime,r=e.nextPlaylist,a=e.bufferLowWaterLine,s=e.bufferHighWaterLine,o=e.duration,u=e.experimentalBufferBasedABR,l=e.log;if(!r)return tr.log.warn("We received no playlist to switch to. Please check your stream."),!1;var c="allowing switch "+(t&&t.id||"null")+" -> "+r.id;if(!t)return l(c+" as current playlist is not set"),!0;if(r.id===t.id)return!1;e=Boolean(Mo(i,n).length);if(!t.endList)return e||"number"!=typeof t.partTargetDuration?(l(c+" as current playlist is live"),!0):(l("not "+c+" as current playlist is live llhls, but currentTime isn't in buffered."),!1);i=jo(i,n),n=u?Sl.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE:Sl.MAX_BUFFER_LOW_WATER_LINE;if(o<n)return l(c+" as duration < max low water line ("+o+" < "+n+")"),!0;n=r.attributes.BANDWIDTH,r=t.attributes.BANDWIDTH;if(n<r&&(!u||i<s)){t=c+" as next bandwidth < current bandwidth ("+n+" < "+r+")";return u&&(t+=" and forwardBuffer < bufferHighWaterLine ("+i+" < "+s+")"),l(t),!0}if((!u||r<n)&&a<=i){a=c+" as forwardBuffer >= bufferLowWaterLine ("+i+" >= "+a+")";return u&&(a+=" and next bandwidth > current bandwidth ("+n+" > "+r+")"),l(a),!0}return l("not "+c+" as no switching criteria met"),!1}({buffered:this.tech_.buffered(),currentTime:i,currentPlaylist:t,nextPlaylist:e,bufferLowWaterLine:n,bufferHighWaterLine:r,duration:this.duration(),experimentalBufferBasedABR:this.experimentalBufferBasedABR,log:this.logger_})},t.setupSegmentLoaderListeners_=function(){var t=this;this.experimentalBufferBasedABR||(this.mainSegmentLoader_.on("bandwidthupdate",function(){var e=t.selectPlaylist();t.shouldSwitchToMedia_(e)&&t.switchMedia_(e,"bandwidthupdate"),t.tech_.trigger("bandwidthupdate")}),this.mainSegmentLoader_.on("progress",function(){t.trigger("progress")})),this.mainSegmentLoader_.on("error",function(){t.blacklistCurrentPlaylist(t.mainSegmentLoader_.error())}),this.mainSegmentLoader_.on("appenderror",function(){t.error=t.mainSegmentLoader_.error_,t.trigger("error")}),this.mainSegmentLoader_.on("syncinfoupdate",function(){t.onSyncInfoUpdate_()}),this.mainSegmentLoader_.on("timestampoffset",function(){t.tech_.trigger({type:"usage",name:"vhs-timestamp-offset"}),t.tech_.trigger({type:"usage",name:"hls-timestamp-offset"})}),this.audioSegmentLoader_.on("syncinfoupdate",function(){t.onSyncInfoUpdate_()}),this.audioSegmentLoader_.on("appenderror",function(){t.error=t.audioSegmentLoader_.error_,t.trigger("error")}),this.mainSegmentLoader_.on("ended",function(){t.logger_("main segment loader ended"),t.onEndOfStream()}),this.mainSegmentLoader_.on("earlyabort",function(e){t.experimentalBufferBasedABR||(t.delegateLoaders_("all",["abort"]),t.blacklistCurrentPlaylist({message:"Aborted early because there isn't enough bandwidth to complete the request without rebuffering."},120))});function e(){if(!t.sourceUpdater_.hasCreatedSourceBuffers())return t.tryToCreateSourceBuffers_();var e=t.getCodecsOrExclude_();e&&t.sourceUpdater_.addOrChangeSourceBuffers(e)}this.mainSegmentLoader_.on("trackinfo",e),this.audioSegmentLoader_.on("trackinfo",e),this.mainSegmentLoader_.on("fmp4",function(){t.triggeredFmp4Usage||(t.tech_.trigger({type:"usage",name:"vhs-fmp4"}),t.tech_.trigger({type:"usage",name:"hls-fmp4"}),t.triggeredFmp4Usage=!0)}),this.audioSegmentLoader_.on("fmp4",function(){t.triggeredFmp4Usage||(t.tech_.trigger({type:"usage",name:"vhs-fmp4"}),t.tech_.trigger({type:"usage",name:"hls-fmp4"}),t.triggeredFmp4Usage=!0)}),this.audioSegmentLoader_.on("ended",function(){t.logger_("audioSegmentLoader ended"),t.onEndOfStream()})},t.mediaSecondsLoaded_=function(){return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded+this.mainSegmentLoader_.mediaSecondsLoaded)},t.load=function(){this.mainSegmentLoader_.load(),this.mediaTypes_.AUDIO.activePlaylistLoader&&this.audioSegmentLoader_.load(),this.mediaTypes_.SUBTITLES.activePlaylistLoader&&this.subtitleSegmentLoader_.load()},t.smoothQualityChange_=function(e){void 0===e&&(e=this.selectPlaylist()),this.fastQualityChange_(e)},t.fastQualityChange_=function(e){var t=this;(e=void 0===e?this.selectPlaylist():e)!==this.masterPlaylistLoader_.media()?(this.switchMedia_(e,"fast-quality"),this.mainSegmentLoader_.resetEverything(function(){tr.browser.IE_VERSION||tr.browser.IS_EDGE?t.tech_.setCurrentTime(t.tech_.currentTime()+.04):t.tech_.setCurrentTime(t.tech_.currentTime())})):this.logger_("skipping fastQualityChange because new media is same as old")},t.play=function(){if(!this.setupFirstPlay()){this.tech_.ended()&&this.tech_.setCurrentTime(0),this.hasPlayed_&&this.load();var e=this.tech_.seekable();return this.tech_.duration()===1/0&&this.tech_.currentTime()<e.start(0)?this.tech_.setCurrentTime(e.end(e.length-1)):void 0}},t.setupFirstPlay=function(){var e=this,t=this.masterPlaylistLoader_.media();if(!t||this.tech_.paused()||this.hasPlayed_)return!1;if(!t.endList){var i=this.seekable();if(!i.length)return!1;if(tr.browser.IE_VERSION&&0===this.tech_.readyState())return this.tech_.one("loadedmetadata",function(){e.trigger("firstplay"),e.tech_.setCurrentTime(i.end(0)),e.hasPlayed_=!0}),!1;this.trigger("firstplay"),this.tech_.setCurrentTime(i.end(0))}return this.hasPlayed_=!0,this.load(),!0},t.handleSourceOpen_=function(){var e;this.tryToCreateSourceBuffers_(),!this.tech_.autoplay()||"undefined"!=typeof(e=this.tech_.play())&&"function"==typeof e.then&&e.then(null,function(e){}),this.trigger("sourceopen")},t.handleSourceEnded_=function(){var e,t;!this.inbandTextTracks_.metadataTrack_||(e=this.inbandTextTracks_.metadataTrack_.cues)&&e.length&&(t=this.duration(),e[e.length-1].endTime=isNaN(t)||Math.abs(t)===1/0?Number.MAX_VALUE:t)},t.handleDurationChange_=function(){this.tech_.trigger("durationchange")},t.onEndOfStream=function(){var e,t=this.mainSegmentLoader_.ended_;(t=this.mediaTypes_.AUDIO.activePlaylistLoader?((e=this.mainSegmentLoader_.getCurrentMediaInfo_())&&!e.hasVideo||t)&&this.audioSegmentLoader_.ended_:t)&&(this.stopABRTimer_(),this.sourceUpdater_.endOfStream())},t.stuckAtPlaylistEnd_=function(e){if(!this.seekable().length)return!1;var t=this.syncController_.getExpiredTime(e,this.duration());if(null===t)return!1;var i=Kl.Playlist.playlistEnd(e,t),e=this.tech_.currentTime(),t=this.tech_.buffered();if(!t.length)return i-e<=.1;t=t.end(t.length-1);return t-e<=.1&&i-t<=.1},t.blacklistCurrentPlaylist=function(e,t){var i=(e=void 0===e?{}:e).playlist||this.masterPlaylistLoader_.media();if(t=t||e.blacklistDuration||this.blacklistDuration,!i)return this.error=e,void("open"!==this.mediaSource.readyState?this.trigger("error"):this.sourceUpdater_.endOfStream("network"));i.playlistErrors_++;var n,r=this.masterPlaylistLoader_.master.playlists,a=r.filter(Jo),s=1===a.length&&a[0]===i;if(1===r.length&&t!==1/0)return tr.log.warn("Problem encountered with playlist "+i.id+". Trying again since it is the only playlist."),this.tech_.trigger("retryplaylist"),this.masterPlaylistLoader_.load(s);s&&(n=!1,r.forEach(function(e){var t;e===i||"undefined"!=typeof(t=e.excludeUntil)&&t!==1/0&&(n=!0,delete e.excludeUntil)}),n&&(tr.log.warn("Removing other playlists from the exclusion list because the last rendition is about to be excluded."),this.tech_.trigger("retryplaylist"))),a=i.playlistErrors_>this.maxPlaylistRetries?1/0:Date.now()+1e3*t,i.excludeUntil=a,e.reason&&(i.lastExcludeReason_=e.reason),this.tech_.trigger("blacklistplaylist"),this.tech_.trigger({type:"usage",name:"vhs-rendition-blacklisted"}),this.tech_.trigger({type:"usage",name:"hls-rendition-blacklisted"});r=this.selectPlaylist();if(!r)return this.error="Playback cannot continue. No available working or supported playlists.",void this.trigger("error");t=e.internal?this.logger_:tr.log.warn,a=e.message?" "+e.message:"";t((e.internal?"Internal problem":"Problem")+" encountered with playlist "+i.id+"."+a+" Switching to playlist "+r.id+"."),r.attributes.AUDIO!==i.attributes.AUDIO&&this.delegateLoaders_("audio",["abort","pause"]),r.attributes.SUBTITLES!==i.attributes.SUBTITLES&&this.delegateLoaders_("subtitle",["abort","pause"]),this.delegateLoaders_("main",["abort","pause"]);a=r.targetDuration/2*1e3||5e3,a="number"==typeof r.lastRequest&&Date.now()-r.lastRequest<=a;return this.switchMedia_(r,"exclude",s||a)},t.pauseLoading=function(){this.delegateLoaders_("all",["abort","pause"]),this.stopABRTimer_()},t.delegateLoaders_=function(i,e){var n=this,r=[],t="all"===i;!t&&"main"!==i||r.push(this.masterPlaylistLoader_);var a=[];!t&&"audio"!==i||a.push("AUDIO"),!t&&"subtitle"!==i||(a.push("CLOSED-CAPTIONS"),a.push("SUBTITLES")),a.forEach(function(e){e=n.mediaTypes_[e]&&n.mediaTypes_[e].activePlaylistLoader;e&&r.push(e)}),["main","audio","subtitle"].forEach(function(e){var t=n[e+"SegmentLoader_"];!t||i!==e&&"all"!==i||r.push(t)}),r.forEach(function(t){return e.forEach(function(e){"function"==typeof t[e]&&t[e]()})})},t.setCurrentTime=function(e){var t=Mo(this.tech_.buffered(),e);return this.masterPlaylistLoader_&&this.masterPlaylistLoader_.media()&&this.masterPlaylistLoader_.media().segments?t&&t.length?e:(this.mainSegmentLoader_.resetEverything(),this.mainSegmentLoader_.abort(),this.mediaTypes_.AUDIO.activePlaylistLoader&&(this.audioSegmentLoader_.resetEverything(),this.audioSegmentLoader_.abort()),this.mediaTypes_.SUBTITLES.activePlaylistLoader&&(this.subtitleSegmentLoader_.resetEverything(),this.subtitleSegmentLoader_.abort()),void this.load()):0},t.duration=function(){if(!this.masterPlaylistLoader_)return 0;var e=this.masterPlaylistLoader_.media();return e?e.endList?this.mediaSource?this.mediaSource.duration:Kl.Playlist.duration(e):1/0:0},t.seekable=function(){return this.seekable_},t.onSyncInfoUpdate_=function(){var e;if(this.masterPlaylistLoader_){var t=this.masterPlaylistLoader_.media();if(t){var i=this.syncController_.getExpiredTime(t,this.duration());if(null!==i){var n,r,a=this.masterPlaylistLoader_.master,s=Kl.Playlist.seekable(t,i,Kl.Playlist.liveEdgeDelay(a,t));if(0!==s.length){if(this.mediaTypes_.AUDIO.activePlaylistLoader){if(t=this.mediaTypes_.AUDIO.activePlaylistLoader.media(),null===(i=this.syncController_.getExpiredTime(t,this.duration())))return;if(0===(e=Kl.Playlist.seekable(t,i,Kl.Playlist.liveEdgeDelay(a,t))).length)return}this.seekable_&&this.seekable_.length&&(n=this.seekable_.end(0),r=this.seekable_.start(0)),!e||e.start(0)>s.end(0)||s.start(0)>e.end(0)?this.seekable_=s:this.seekable_=tr.createTimeRanges([[(e.start(0)>s.start(0)?e:s).start(0),(e.end(0)<s.end(0)?e:s).end(0)]]),this.seekable_&&this.seekable_.length&&this.seekable_.end(0)===n&&this.seekable_.start(0)===r||(this.logger_("seekable updated ["+Uo(this.seekable_)+"]"),this.tech_.trigger("seekablechanged"))}}}}},t.updateDuration=function(e){if(this.updateDuration_&&(this.mediaSource.removeEventListener("sourceopen",this.updateDuration_),this.updateDuration_=null),"open"!==this.mediaSource.readyState)return this.updateDuration_=this.updateDuration.bind(this,e),void this.mediaSource.addEventListener("sourceopen",this.updateDuration_);if(e){var t=this.seekable();return t.length?void((isNaN(this.mediaSource.duration)||this.mediaSource.duration<t.end(t.length-1))&&this.sourceUpdater_.setDuration(t.end(t.length-1))):void 0}e=this.tech_.buffered(),t=Kl.Playlist.duration(this.masterPlaylistLoader_.media());0<e.length&&(t=Math.max(t,e.end(e.length-1))),this.mediaSource.duration!==t&&this.sourceUpdater_.setDuration(t)},t.dispose=function(){var n=this;this.trigger("dispose"),this.decrypter_.terminate(),this.masterPlaylistLoader_.dispose(),this.mainSegmentLoader_.dispose(),this.loadOnPlay_&&this.tech_.off("play",this.loadOnPlay_),["AUDIO","SUBTITLES"].forEach(function(e){var t,i=n.mediaTypes_[e].groups;for(t in i)i[t].forEach(function(e){e.playlistLoader&&e.playlistLoader.dispose()})}),this.audioSegmentLoader_.dispose(),this.subtitleSegmentLoader_.dispose(),this.sourceUpdater_.dispose(),this.timelineChangeController_.dispose(),this.stopABRTimer_(),this.updateDuration_&&this.mediaSource.removeEventListener("sourceopen",this.updateDuration_),this.mediaSource.removeEventListener("durationchange",this.handleDurationChange_),this.mediaSource.removeEventListener("sourceopen",this.handleSourceOpen_),this.mediaSource.removeEventListener("sourceended",this.handleSourceEnded_),this.off()},t.master=function(){return this.masterPlaylistLoader_.master},t.media=function(){return this.masterPlaylistLoader_.media()||this.initialMedia_},t.areMediaTypesKnown_=function(){var e=!!this.mediaTypes_.AUDIO.activePlaylistLoader,t=!!this.mainSegmentLoader_.getCurrentMediaInfo_(),e=!e||!!this.audioSegmentLoader_.getCurrentMediaInfo_();return t&&e},t.getCodecsOrExclude_=function(){var n=this,r={main:this.mainSegmentLoader_.getCurrentMediaInfo_()||{},audio:this.audioSegmentLoader_.getCurrentMediaInfo_()||{}};r.video=r.main;var e=Yu(this.master(),this.media()),a={},t=!!this.mediaTypes_.AUDIO.activePlaylistLoader;if(r.main.hasVideo&&(a.video=e.video||r.main.videoCodec||"avc1.4d400d"),r.main.isMuxed&&(a.video+=","+(e.audio||r.main.audioCodec||Cr)),(r.main.hasAudio&&!r.main.isMuxed||r.audio.hasAudio||t)&&(a.audio=e.audio||r.main.audioCodec||r.audio.audioCodec||Cr,r.audio.isFmp4=(r.main.hasAudio&&!r.main.isMuxed?r.main:r.audio).isFmp4),a.audio||a.video){var s,i,o={};if(["video","audio"].forEach(function(e){var t,i;a.hasOwnProperty(e)&&(t=r[e].isFmp4,i=a[e],!(t?gr:yr)(i))&&(i=r[e].isFmp4?"browser":"muxer",o[i]=o[i]||[],o[i].push(a[e]),"audio"===e&&(s=i))}),t&&s&&this.media().attributes.AUDIO&&(i=this.media().attributes.AUDIO,this.master().playlists.forEach(function(e){(e.attributes&&e.attributes.AUDIO)===i&&e!==n.media()&&(e.excludeUntil=1/0)}),this.logger_("excluding audio group "+i+" as "+s+' does not support codec(s): "'+a.audio+'"')),!Object.keys(o).length){if(this.sourceUpdater_.hasCreatedSourceBuffers()&&!this.sourceUpdater_.canChangeType()){var u=[];if(["video","audio"].forEach(function(e){var t=(pr(n.sourceUpdater_.codecs[e]||"")[0]||{}).type,i=(pr(a[e]||"")[0]||{}).type;t&&i&&t.toLowerCase()!==i.toLowerCase()&&u.push('"'+n.sourceUpdater_.codecs[e]+'" -> "'+a[e]+'"')}),u.length)return void this.blacklistCurrentPlaylist({playlist:this.media(),message:"Codec switching not supported: "+u.join(", ")+".",blacklistDuration:1/0,internal:!0})}return a}t=Object.keys(o).reduce(function(e,t){return e&&(e+=", "),e+=t+' does not support codec(s): "'+o[t].join(",")+'"'},"")+".";this.blacklistCurrentPlaylist({playlist:this.media(),internal:!0,message:t,blacklistDuration:1/0})}else this.blacklistCurrentPlaylist({playlist:this.media(),message:"Could not determine codecs for playlist.",blacklistDuration:1/0})},t.tryToCreateSourceBuffers_=function(){var e;"open"!==this.mediaSource.readyState||this.sourceUpdater_.hasCreatedSourceBuffers()||!this.areMediaTypesKnown_()||(e=this.getCodecsOrExclude_())&&(this.sourceUpdater_.createSourceBuffers(e),e=[e.video,e.audio].filter(Boolean).join(","),this.excludeIncompatibleVariants_(e))},t.excludeUnsupportedVariants_=function(){var n=this,r=this.master().playlists,a=[];Object.keys(r).forEach(function(e){var t,i=r[e];-1===a.indexOf(i.id)&&(a.push(i.id),t=[],!(e=Yu(n.master,i)).audio||yr(e.audio)||gr(e.audio)||t.push("audio codec "+e.audio),!e.video||yr(e.video)||gr(e.video)||t.push("video codec "+e.video),e.text&&"stpp.ttml.im1t"===e.text&&t.push("text codec "+e.text),t.length&&(i.excludeUntil=1/0,n.logger_("excluding "+i.id+" for unsupported: "+t.join(", "))))})},t.excludeIncompatibleVariants_=function(e){var r=this,a=[],s=this.master().playlists,e=Xu(pr(e)),o=Ku(e),u=e.video&&pr(e.video)[0]||null,l=e.audio&&pr(e.audio)[0]||null;Object.keys(s).forEach(function(e){var t,i,n=s[e];-1===a.indexOf(n.id)&&n.excludeUntil!==1/0&&(a.push(n.id),t=[],i=Yu(r.masterPlaylistLoader_.master,n),e=Ku(i),(i.audio||i.video)&&(e!==o&&t.push('codec count "'+e+'" !== "'+o+'"'),r.sourceUpdater_.canChangeType()||(e=i.video&&pr(i.video)[0]||null,i=i.audio&&pr(i.audio)[0]||null,e&&u&&e.type.toLowerCase()!==u.type.toLowerCase()&&t.push('video codec "'+e.type+'" !== "'+u.type+'"'),i&&l&&i.type.toLowerCase()!==l.type.toLowerCase()&&t.push('audio codec "'+i.type+'" !== "'+l.type+'"')),t.length&&(n.excludeUntil=1/0,r.logger_("blacklisting "+n.id+": "+t.join(" && ")))))})},t.updateAdCues_=function(e){var t=0,i=this.seekable();i.length&&(t=i.start(0)),function(e,t,i){if(void 0===i&&(i=0),e.segments)for(var n=i,r=0;r<e.segments.length;r++){var a,s,o,u=e.segments[r];if(o=o||function(e,t){for(var i=e.cues,n=0;n<i.length;n++){var r=i[n];if(t>=r.adStartTime&&t<=r.adEndTime)return r}return null}(t,n+u.duration/2)){if("cueIn"in u){o.endTime=n,o.adEndTime=n,n+=u.duration,o=null;continue}if(n<o.endTime){n+=u.duration;continue}o.endTime+=u.duration}else"cueOut"in u&&((o=new window.VTTCue(n,n+u.duration,u.cueOut)).adStartTime=n,o.adEndTime=n+parseFloat(u.cueOut),t.addCue(o)),"cueOutCont"in u&&(a=(s=u.cueOutCont.split("/").map(parseFloat))[0],s=s[1],(o=new window.VTTCue(n,n+u.duration,"")).adStartTime=n-a,o.adEndTime=o.adStartTime+s,t.addCue(o));n+=u.duration}}(e,this.cueTagsTrack_,t)},t.goalBufferLength=function(){var e=this.tech_.currentTime(),t=Sl.GOAL_BUFFER_LENGTH,i=Sl.GOAL_BUFFER_LENGTH_RATE,n=Math.max(t,Sl.MAX_GOAL_BUFFER_LENGTH);return Math.min(t+e*i,n)},t.bufferLowWaterLine=function(){var e=this.tech_.currentTime(),t=Sl.BUFFER_LOW_WATER_LINE,i=Sl.BUFFER_LOW_WATER_LINE_RATE,n=Math.max(t,Sl.MAX_BUFFER_LOW_WATER_LINE),r=Math.max(t,Sl.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);return Math.min(t+e*i,this.experimentalBufferBasedABR?r:n)},t.bufferHighWaterLine=function(){return Sl.BUFFER_HIGH_WATER_LINE},e}(tr.EventTarget),_c=["seeking","seeked","pause","playing","error"],bc=function(){function e(e){var i=this;this.masterPlaylistController_=e.masterPlaylistController,this.tech_=e.tech,this.seekable=e.seekable,this.allowSeeksWithinUnsafeLiveWindow=e.allowSeeksWithinUnsafeLiveWindow,this.liveRangeSafeTimeDelta=e.liveRangeSafeTimeDelta,this.media=e.media,this.consecutiveUpdates=0,this.lastRecordedTime=null,this.timer_=null,this.checkCurrentTimeTimeout_=null,this.logger_=Oo("PlaybackWatcher"),this.logger_("initialize");function t(){return i.monitorCurrentTime_()}function n(){return i.monitorCurrentTime_()}function r(){return i.techWaiting_()}function a(){return i.cancelTimer_()}var s=this.masterPlaylistController_,o=["main","subtitle","audio"],u={};o.forEach(function(e){u[e]={reset:function(){return i.resetSegmentDownloads_(e)},updateend:function(){return i.checkSegmentDownloads_(e)}},s[e+"SegmentLoader_"].on("appendsdone",u[e].updateend),s[e+"SegmentLoader_"].on("playlistupdate",u[e].reset),i.tech_.on(["seeked","seeking"],u[e].reset)});function l(t){["main","audio"].forEach(function(e){s[e+"SegmentLoader_"][t]("appended",i.seekingAppendCheck_)})}this.seekingAppendCheck_=function(){i.fixesBadSeeks_()&&(i.consecutiveUpdates=0,i.lastRecordedTime=i.tech_.currentTime(),l("off"))},this.clearSeekingAppendCheck_=function(){return l("off")},this.watchForBadSeeking_=function(){i.clearSeekingAppendCheck_(),l("on")},this.tech_.on("seeked",this.clearSeekingAppendCheck_),this.tech_.on("seeking",this.watchForBadSeeking_),this.tech_.on("waiting",r),this.tech_.on(_c,a),this.tech_.on("canplay",n),this.tech_.one("play",t),this.dispose=function(){i.clearSeekingAppendCheck_(),i.logger_("dispose"),i.tech_.off("waiting",r),i.tech_.off(_c,a),i.tech_.off("canplay",n),i.tech_.off("play",t),i.tech_.off("seeking",i.watchForBadSeeking_),i.tech_.off("seeked",i.clearSeekingAppendCheck_),o.forEach(function(e){s[e+"SegmentLoader_"].off("appendsdone",u[e].updateend),s[e+"SegmentLoader_"].off("playlistupdate",u[e].reset),i.tech_.off(["seeked","seeking"],u[e].reset)}),i.checkCurrentTimeTimeout_&&window.clearTimeout(i.checkCurrentTimeTimeout_),i.cancelTimer_()}}var t=e.prototype;return t.monitorCurrentTime_=function(){this.checkCurrentTime_(),this.checkCurrentTimeTimeout_&&window.clearTimeout(this.checkCurrentTimeTimeout_),this.checkCurrentTimeTimeout_=window.setTimeout(this.monitorCurrentTime_.bind(this),250)},t.resetSegmentDownloads_=function(e){var t=this.masterPlaylistController_[e+"SegmentLoader_"];0<this[e+"StalledDownloads_"]&&this.logger_("resetting possible stalled download count for "+e+" loader"),this[e+"StalledDownloads_"]=0,this[e+"Buffered_"]=t.buffered_()},t.checkSegmentDownloads_=function(e){var t=this.masterPlaylistController_,i=t[e+"SegmentLoader_"],n=i.buffered_(),r=function(e,t){if(e===t)return!1;if(!e&&t||!t&&e)return!0;if(e.length!==t.length)return!0;for(var i=0;i<e.length;i++)if(e.start(i)!==t.start(i)||e.end(i)!==t.end(i))return!0;return!1}(this[e+"Buffered_"],n);this[e+"Buffered_"]=n,r?this.resetSegmentDownloads_(e):(this[e+"StalledDownloads_"]++,this.logger_("found #"+this[e+"StalledDownloads_"]+" "+e+" appends that did not increase buffer (possible stalled download)",{playlistId:i.playlist_&&i.playlist_.id,buffered:Bo(n)}),this[e+"StalledDownloads_"]<10||(this.logger_(e+" loader stalled download exclusion"),this.resetSegmentDownloads_(e),this.tech_.trigger({type:"usage",name:"vhs-"+e+"-download-exclusion"}),"subtitle"!==e&&t.blacklistCurrentPlaylist({message:"Excessive "+e+" segment downloading detected."},1/0)))},t.checkCurrentTime_=function(){if(!this.tech_.paused()&&!this.tech_.seeking()){var e=this.tech_.currentTime(),t=this.tech_.buffered();if(this.lastRecordedTime===e&&(!t.length||e+.1>=t.end(t.length-1)))return this.techWaiting_();5<=this.consecutiveUpdates&&e===this.lastRecordedTime?(this.consecutiveUpdates++,this.waiting_()):e===this.lastRecordedTime?this.consecutiveUpdates++:(this.consecutiveUpdates=0,this.lastRecordedTime=e)}},t.cancelTimer_=function(){this.consecutiveUpdates=0,this.timer_&&(this.logger_("cancelTimer_"),clearTimeout(this.timer_)),this.timer_=null},t.fixesBadSeeks_=function(){if(!this.tech_.seeking())return!1;var e,t=this.seekable(),i=this.tech_.currentTime();if(this.afterSeekableWindow_(t,i,this.media(),this.allowSeeksWithinUnsafeLiveWindow)&&(e=t.end(t.length-1)),"undefined"!=typeof(e=this.beforeSeekableWindow_(t,i)?(a=t.start(0))+(a===t.end(0)?0:.1):e))return this.logger_("Trying to seek outside of seekable at time "+i+" with seekable range "+Uo(t)+". Seeking to "+e+"."),this.tech_.setCurrentTime(e),!0;for(var n=this.masterPlaylistController_.sourceUpdater_,r=this.tech_.buffered(),a=n.audioBuffer?n.audioBuffered():null,t=n.videoBuffer?n.videoBuffered():null,n=this.media(),s=n.partTargetDuration||2*(n.targetDuration-hl),o=[a,t],u=0;u<o.length;u++)if(o[u])if(jo(o[u],i)<s)return!1;r=No(r,i);return 0!==r.length&&(e=r.start(0)+.1,this.logger_("Buffered region starts ("+r.start(0)+")  just beyond seek point ("+i+"). Seeking to "+e+"."),this.tech_.setCurrentTime(e),!0)},t.waiting_=function(){var e,t;this.techWaiting_()||(e=this.tech_.currentTime(),t=this.tech_.buffered(),(t=Mo(t,e)).length&&e+3<=t.end(0)&&(this.cancelTimer_(),this.tech_.setCurrentTime(e),this.logger_("Stopped at "+e+" while inside a buffered region ["+t.start(0)+" -> "+t.end(0)+"]. Attempting to resume playback by seeking to the current time."),this.tech_.trigger({type:"usage",name:"vhs-unknown-waiting"}),this.tech_.trigger({type:"usage",name:"hls-unknown-waiting"})))},t.techWaiting_=function(){var e=this.seekable(),t=this.tech_.currentTime();if(this.tech_.seeking()||null!==this.timer_)return!0;if(this.beforeSeekableWindow_(e,t)){var i=e.end(e.length-1);return this.logger_("Fell out of live window at time "+t+". Seeking to live point (seekable end) "+i),this.cancelTimer_(),this.tech_.setCurrentTime(i),this.tech_.trigger({type:"usage",name:"vhs-live-resync"}),this.tech_.trigger({type:"usage",name:"hls-live-resync"}),!0}e=this.tech_.vhs.masterPlaylistController_.sourceUpdater_,i=this.tech_.buffered();if(this.videoUnderflow_({audioBuffered:e.audioBuffered(),videoBuffered:e.videoBuffered(),currentTime:t}))return this.cancelTimer_(),this.tech_.setCurrentTime(t),this.tech_.trigger({type:"usage",name:"vhs-video-underflow"}),this.tech_.trigger({type:"usage",name:"hls-video-underflow"}),!0;e=No(i,t);if(0<e.length){i=e.start(0)-t;return this.logger_("Stopped at "+t+", setting timer for "+i+", seeking to "+e.start(0)),this.cancelTimer_(),this.timer_=setTimeout(this.skipTheGap_.bind(this),1e3*i,t),!0}return!1},t.afterSeekableWindow_=function(e,t,i,n){if(void 0===n&&(n=!1),!e.length)return!1;var r=e.end(e.length-1)+.1;return(r=!i.endList&&n?e.end(e.length-1)+3*i.targetDuration:r)<t},t.beforeSeekableWindow_=function(e,t){return!!(e.length&&0<e.start(0)&&t<e.start(0)-this.liveRangeSafeTimeDelta)},t.videoUnderflow_=function(e){var t,i,n=e.videoBuffered,r=e.audioBuffered,a=e.currentTime;if(n)return n.length&&r.length?(i=Mo(n,a-3),e=Mo(n,a),(r=Mo(r,a)).length&&!e.length&&i.length&&(t={start:i.end(0),end:r.end(0)})):No(n,a).length||(t=this.gapFromVideoUnderflow_(n,a)),!!t&&(this.logger_("Encountered a gap in video from "+t.start+" to "+t.end+". Seeking to current time "+a),!0)},t.skipTheGap_=function(e){var t=this.tech_.buffered(),i=this.tech_.currentTime(),t=No(t,i);this.cancelTimer_(),0!==t.length&&i===e&&(this.logger_("skipTheGap_:","currentTime:",i,"scheduled currentTime:",e,"nextRange start:",t.start(0)),this.tech_.setCurrentTime(t.start(0)+hl),this.tech_.trigger({type:"usage",name:"vhs-gap-skip"}),this.tech_.trigger({type:"usage",name:"hls-gap-skip"}))},t.gapFromVideoUnderflow_=function(e,t){for(var i=function(e){if(e.length<2)return tr.createTimeRanges();for(var t=[],i=1;i<e.length;i++){var n=e.end(i-1),r=e.start(i);t.push([n,r])}return tr.createTimeRanges(t)}(e),n=0;n<i.length;n++){var r=i.start(n),a=i.end(n);if(t-r<4&&2<t-r)return{start:r,end:a}}return null},e}(),Tc={errorInterval:30,getSource:function(e){return e(this.tech({IWillNotUseThisInPlugins:!0}).currentSource_||this.currentSource())}},Sc={PlaylistLoader:yl,Playlist:fl,utils:zt,STANDARD_PLAYLIST_SELECTOR:ar,INITIAL_PLAYLIST_SELECTOR:function(){var t=this,e=this.playlists.master.playlists.filter(fl.isEnabled);return Ju(e,Zu),e.filter(function(e){return!!Yu(t.playlists.master,e).video})[0]||null},lastBandwidthSelector:ar,movingAverageBandwidthSelector:function(t){var i=-1,n=-1;if(t<0||1<t)throw new Error("Moving average bandwidth decay must be between 0 and 1.");return function(){var e=this.useDevicePixelRatio&&window.devicePixelRatio||1;return i<0&&(i=this.systemBandwidth,n=this.systemBandwidth),0<this.systemBandwidth&&this.systemBandwidth!==n&&(i=t*this.systemBandwidth+(1-t)*i,n=this.systemBandwidth),el(this.playlists.master,i,parseInt($u(this.tech_.el(),"width"),10)*e,parseInt($u(this.tech_.el(),"height"),10)*e,this.limitRenditionByPlayerDimensions,this.masterPlaylistController_)}},comparePlaylistBandwidth:Zu,comparePlaylistResolution:function(e,t){var i,n;return(i=(i=e.attributes.RESOLUTION&&e.attributes.RESOLUTION.width?e.attributes.RESOLUTION.width:i)||window.Number.MAX_VALUE)===(n=(n=t.attributes.RESOLUTION&&t.attributes.RESOLUTION.width?t.attributes.RESOLUTION.width:n)||window.Number.MAX_VALUE)&&e.attributes.BANDWIDTH&&t.attributes.BANDWIDTH?e.attributes.BANDWIDTH-t.attributes.BANDWIDTH:i-n},xhr:mu()};Object.keys(Sl).forEach(function(t){Object.defineProperty(Sc,t,{get:function(){return tr.log.warn("using Vhs."+t+" is UNSAFE be sure you know what you are doing"),Sl[t]},set:function(e){tr.log.warn("using Vhs."+t+" is UNSAFE be sure you know what you are doing"),"number"!=typeof e||e<0?tr.log.warn("value of Vhs."+t+" must be greater than or equal to 0"):Sl[t]=e}})});function wc(e,t){for(var i=t.media(),n=-1,r=0;r<e.length;r++)if(e[r].id===i.id){n=r;break}e.selectedIndex_=n,e.trigger({selectedIndex:n,type:"change"})}var Ec="videojs-vhs";Sc.canPlaySource=function(){return tr.log.warn("HLS is no longer a tech. Please remove it from your player's techOrder.")};function kc(e){var n=e.player,t=e.sourceKeySystems,i=e.audioMedia,e=e.mainPlaylists;if(!n.eme.initializeMediaKeys)return Promise.resolve();var r,e=(e=e=i?e.concat([i]):e,r=Object.keys(t),e.reduce(function(e,n){if(!n.contentProtection)return e;var t=r.reduce(function(e,t){var i=n.contentProtection[t];return i&&i.pssh&&(e[t]={pssh:i.pssh}),e},{});return Object.keys(t).length&&e.push(t),e},[])),a=[],s=[];return e.forEach(function(e){s.push(new Promise(function(e,t){n.tech_.one("keysessioncreated",e)})),a.push(new Promise(function(t,i){n.eme.initializeMediaKeys({keySystems:e},function(e){e?i(e):t()})}))}),Promise.race([Promise.all(a),Promise.race(s)])}function Cc(e){var t=e.player;return!!(e=function(e,t,i){if(!e)return e;var n={};t&&t.attributes&&t.attributes.CODECS&&(n=Xu(pr(t.attributes.CODECS))),i&&i.attributes&&i.attributes.CODECS&&(n.audio=i.attributes.CODECS);var r,a=mr(n.video),s=mr(n.audio),o={};for(r in e)o[r]={},s&&(o[r].audioContentType=s),a&&(o[r].videoContentType=a),t.contentProtection&&t.contentProtection[r]&&t.contentProtection[r].pssh&&(o[r].pssh=t.contentProtection[r].pssh),"string"==typeof e[r]&&(o[r].url=e[r]);return tr.mergeOptions(e,o)}(e.sourceKeySystems,e.media,e.audioMedia))&&(!((t.currentSource().keySystems=e)&&!t.eme)||(tr.log.warn("DRM encrypted source cannot be decrypted without a DRM plugin"),!1))}function Ic(){if(!window.localStorage)return null;var e=window.localStorage.getItem(Ec);if(!e)return null;try{return JSON.parse(e)}catch(e){return null}}Sc.supportsNativeHls=function(){if(!document||!document.createElement)return!1;var t=document.createElement("video");if(!tr.getTech("Html5").isSupported())return!1;return["application/vnd.apple.mpegurl","audio/mpegurl","audio/x-mpegurl","application/x-mpegurl","video/x-mpegurl","video/mpegurl","application/mpegurl"].some(function(e){return/maybe|probably/i.test(t.canPlayType(e))})}(),Sc.supportsNativeDash=!!(document&&document.createElement&&tr.getTech("Html5").isSupported())&&/maybe|probably/i.test(document.createElement("video").canPlayType("application/dash+xml")),Sc.supportsTypeNatively=function(e){return"hls"===e?Sc.supportsNativeHls:"dash"===e&&Sc.supportsNativeDash},Sc.isSupported=function(){return tr.log.warn("HLS is no longer a tech. Please remove it from your player's techOrder.")};var xc=function(r){function e(e,t,i){var n=r.call(this,t,tr.mergeOptions(i.hls,i.vhs))||this;if(i.hls&&Object.keys(i.hls).length&&tr.log.warn("Using hls options is deprecated. Use vhs instead."),"number"==typeof i.initialBandwidth&&(n.options_.bandwidth=i.initialBandwidth),n.logger_=Oo("VhsHandler"),t.options_&&t.options_.playerId&&((i=tr(t.options_.playerId)).hasOwnProperty("hls")||Object.defineProperty(i,"hls",{get:function(){return tr.log.warn("player.hls is deprecated. Use player.tech().vhs instead."),t.trigger({type:"usage",name:"hls-player-access"}),ft(n)},configurable:!0}),i.hasOwnProperty("vhs")||Object.defineProperty(i,"vhs",{get:function(){return tr.log.warn("player.vhs is deprecated. Use player.tech().vhs instead."),t.trigger({type:"usage",name:"vhs-player-access"}),ft(n)},configurable:!0}),i.hasOwnProperty("dash")||Object.defineProperty(i,"dash",{get:function(){return tr.log.warn("player.dash is deprecated. Use player.tech().vhs instead."),ft(n)},configurable:!0}),n.player_=i),n.tech_=t,n.source_=e,n.stats={},n.ignoreNextSeekingEvent_=!1,n.setOptions_(),n.options_.overrideNative&&t.overrideNativeAudioTracks&&t.overrideNativeVideoTracks)t.overrideNativeAudioTracks(!0),t.overrideNativeVideoTracks(!0);else if(n.options_.overrideNative&&(t.featuresNativeVideoTracks||t.featuresNativeAudioTracks))throw new Error("Overriding native HLS requires emulated tracks. See https://git.io/vMpjB");return n.on(document,["fullscreenchange","webkitfullscreenchange","mozfullscreenchange","MSFullscreenChange"],function(e){var t=document.fullscreenElement||document.webkitFullscreenElement||document.mozFullScreenElement||document.msFullscreenElement;t&&t.contains(n.tech_.el())?n.masterPlaylistController_.fastQualityChange_():n.masterPlaylistController_.checkABR_()}),n.on(n.tech_,"seeking",function(){this.ignoreNextSeekingEvent_?this.ignoreNextSeekingEvent_=!1:this.setCurrentTime(this.tech_.currentTime())}),n.on(n.tech_,"error",function(){this.tech_.error()&&this.masterPlaylistController_&&this.masterPlaylistController_.pauseLoading()}),n.on(n.tech_,"play",n.play),n}mt(e,r);var t=e.prototype;return t.setOptions_=function(){var e,t=this;this.options_.withCredentials=this.options_.withCredentials||!1,this.options_.handleManifestRedirects=!1!==this.options_.handleManifestRedirects,this.options_.limitRenditionByPlayerDimensions=!1!==this.options_.limitRenditionByPlayerDimensions,this.options_.useDevicePixelRatio=this.options_.useDevicePixelRatio||!1,this.options_.smoothQualityChange=this.options_.smoothQualityChange||!1,this.options_.useBandwidthFromLocalStorage="undefined"!=typeof this.source_.useBandwidthFromLocalStorage?this.source_.useBandwidthFromLocalStorage:this.options_.useBandwidthFromLocalStorage||!1,this.options_.useNetworkInformationApi=this.options_.useNetworkInformationApi||!1,this.options_.customTagParsers=this.options_.customTagParsers||[],this.options_.customTagMappers=this.options_.customTagMappers||[],this.options_.cacheEncryptionKeys=this.options_.cacheEncryptionKeys||!1,"number"!=typeof this.options_.blacklistDuration&&(this.options_.blacklistDuration=300),"number"!=typeof this.options_.bandwidth&&this.options_.useBandwidthFromLocalStorage&&((e=Ic())&&e.bandwidth&&(this.options_.bandwidth=e.bandwidth,this.tech_.trigger({type:"usage",name:"vhs-bandwidth-from-local-storage"}),this.tech_.trigger({type:"usage",name:"hls-bandwidth-from-local-storage"})),e&&e.throughput&&(this.options_.throughput=e.throughput,this.tech_.trigger({type:"usage",name:"vhs-throughput-from-local-storage"}),this.tech_.trigger({type:"usage",name:"hls-throughput-from-local-storage"}))),"number"!=typeof this.options_.bandwidth&&(this.options_.bandwidth=Sl.INITIAL_BANDWIDTH),this.options_.enableLowInitialPlaylist=this.options_.enableLowInitialPlaylist&&this.options_.bandwidth===Sl.INITIAL_BANDWIDTH,["withCredentials","useDevicePixelRatio","limitRenditionByPlayerDimensions","bandwidth","smoothQualityChange","customTagParsers","customTagMappers","handleManifestRedirects","cacheEncryptionKeys","playlistSelector","initialPlaylistSelector","experimentalBufferBasedABR","liveRangeSafeTimeDelta","experimentalLLHLS","useNetworkInformationApi","experimentalExactManifestTimings","experimentalLeastPixelDiffSelector"].forEach(function(e){"undefined"!=typeof t.source_[e]&&(t.options_[e]=t.source_[e])}),this.limitRenditionByPlayerDimensions=this.options_.limitRenditionByPlayerDimensions,this.useDevicePixelRatio=this.options_.useDevicePixelRatio},t.src=function(e,t){var n=this;e&&(this.setOptions_(),this.options_.src=0===(e=this.source_.src).toLowerCase().indexOf("data:application/vnd.videojs.vhs+json,")?JSON.parse(e.substring(e.indexOf(",")+1)):e,this.options_.tech=this.tech_,this.options_.externVhs=Sc,this.options_.sourceType=vr(t),this.options_.seekTo=function(e){n.tech_.setCurrentTime(e)},this.options_.smoothQualityChange&&tr.log.warn("smoothQualityChange is deprecated and will be removed in the next major version"),this.masterPlaylistController_=new vc(this.options_),t=tr.mergeOptions({liveRangeSafeTimeDelta:.1},this.options_,{seekable:function(){return n.seekable()},media:function(){return n.masterPlaylistController_.media()},masterPlaylistController:this.masterPlaylistController_}),this.playbackWatcher_=new bc(t),this.masterPlaylistController_.on("error",function(){var e=tr.players[n.tech_.options_.playerId],t=n.masterPlaylistController_.error;"object"!=typeof t||t.code?"string"==typeof t&&(t={message:t,code:3}):t.code=3,e.error(t)}),t=this.options_.experimentalBufferBasedABR?Sc.movingAverageBandwidthSelector(.55):Sc.STANDARD_PLAYLIST_SELECTOR,this.masterPlaylistController_.selectPlaylist=(this.selectPlaylist||t).bind(this),this.masterPlaylistController_.selectInitialPlaylist=Sc.INITIAL_PLAYLIST_SELECTOR.bind(this),this.playlists=this.masterPlaylistController_.masterPlaylistLoader_,this.mediaSource=this.masterPlaylistController_.mediaSource,Object.defineProperties(this,{selectPlaylist:{get:function(){return this.masterPlaylistController_.selectPlaylist},set:function(e){this.masterPlaylistController_.selectPlaylist=e.bind(this)}},throughput:{get:function(){return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate},set:function(e){this.masterPlaylistController_.mainSegmentLoader_.throughput.rate=e,this.masterPlaylistController_.mainSegmentLoader_.throughput.count=1}},bandwidth:{get:function(){var e=this.masterPlaylistController_.mainSegmentLoader_.bandwidth,t=window.navigator.connection||window.navigator.mozConnection||window.navigator.webkitConnection;return e=this.options_.useNetworkInformationApi&&t?1e7<=(t=1e3*t.downlink*1e3)&&1e7<=e?Math.max(e,t):t:e},set:function(e){this.masterPlaylistController_.mainSegmentLoader_.bandwidth=e,this.masterPlaylistController_.mainSegmentLoader_.throughput={rate:0,count:0}}},systemBandwidth:{get:function(){var e=1/(this.bandwidth||1),t=0<this.throughput?1/this.throughput:0;return Math.floor(1/(e+t))},set:function(){tr.log.error('The "systemBandwidth" property is read-only')}}}),this.options_.bandwidth&&(this.bandwidth=this.options_.bandwidth),this.options_.throughput&&(this.throughput=this.options_.throughput),Object.defineProperties(this.stats,{bandwidth:{get:function(){return n.bandwidth||0},enumerable:!0},mediaRequests:{get:function(){return n.masterPlaylistController_.mediaRequests_()||0},enumerable:!0},mediaRequestsAborted:{get:function(){return n.masterPlaylistController_.mediaRequestsAborted_()||0},enumerable:!0},mediaRequestsTimedout:{get:function(){return n.masterPlaylistController_.mediaRequestsTimedout_()||0},enumerable:!0},mediaRequestsErrored:{get:function(){return n.masterPlaylistController_.mediaRequestsErrored_()||0},enumerable:!0},mediaTransferDuration:{get:function(){return n.masterPlaylistController_.mediaTransferDuration_()||0},enumerable:!0},mediaBytesTransferred:{get:function(){return n.masterPlaylistController_.mediaBytesTransferred_()||0},enumerable:!0},mediaSecondsLoaded:{get:function(){return n.masterPlaylistController_.mediaSecondsLoaded_()||0},enumerable:!0},mediaAppends:{get:function(){return n.masterPlaylistController_.mediaAppends_()||0},enumerable:!0},mainAppendsToLoadedData:{get:function(){return n.masterPlaylistController_.mainAppendsToLoadedData_()||0},enumerable:!0},audioAppendsToLoadedData:{get:function(){return n.masterPlaylistController_.audioAppendsToLoadedData_()||0},enumerable:!0},appendsToLoadedData:{get:function(){return n.masterPlaylistController_.appendsToLoadedData_()||0},enumerable:!0},timeToLoadedData:{get:function(){return n.masterPlaylistController_.timeToLoadedData_()||0},enumerable:!0},buffered:{get:function(){return Bo(n.tech_.buffered())},enumerable:!0},currentTime:{get:function(){return n.tech_.currentTime()},enumerable:!0},currentSource:{get:function(){return n.tech_.currentSource_},enumerable:!0},currentTech:{get:function(){return n.tech_.name_},enumerable:!0},duration:{get:function(){return n.tech_.duration()},enumerable:!0},master:{get:function(){return n.playlists.master},enumerable:!0},playerDimensions:{get:function(){return n.tech_.currentDimensions()},enumerable:!0},seekable:{get:function(){return Bo(n.tech_.seekable())},enumerable:!0},timestamp:{get:function(){return Date.now()},enumerable:!0},videoPlaybackQuality:{get:function(){return n.tech_.getVideoPlaybackQuality()},enumerable:!0}}),this.tech_.one("canplay",this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_)),this.tech_.on("bandwidthupdate",function(){n.options_.useBandwidthFromLocalStorage&&function(e){if(!window.localStorage)return;var t=(t=Ic())?tr.mergeOptions(t,e):e;try{window.localStorage.setItem(Ec,JSON.stringify(t))}catch(e){return}}({bandwidth:n.bandwidth,throughput:Math.round(n.throughput)})}),this.masterPlaylistController_.on("selectedinitialmedia",function(){var i;(i=n).representations=function(){var e=i.masterPlaylistController_.master(),e=nu(e)?i.masterPlaylistController_.getAudioTrackPlaylists_():e.playlists;return e?e.filter(function(e){return!$o(e)}).map(function(e,t){return new zl(i,e,e.id)}):[]}}),this.masterPlaylistController_.sourceUpdater_.on("createdsourcebuffers",function(){n.setupEme_()}),this.on(this.masterPlaylistController_,"progress",function(){this.tech_.trigger("progress")}),this.on(this.masterPlaylistController_,"firstplay",function(){this.ignoreNextSeekingEvent_=!0}),this.setupQualityLevels_(),this.tech_.el()&&(this.mediaSourceUrl_=window.URL.createObjectURL(this.masterPlaylistController_.mediaSource),this.tech_.src(this.mediaSourceUrl_)))},t.createKeySessions_=function(){var t=this,e=this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;this.logger_("waiting for EME key session creation"),kc({player:this.player_,sourceKeySystems:this.source_.keySystems,audioMedia:e&&e.media(),mainPlaylists:this.playlists.master.playlists}).then(function(){t.logger_("created EME key session"),t.masterPlaylistController_.sourceUpdater_.initializedEme()}).catch(function(e){t.logger_("error while creating EME key session",e),t.player_.error({message:"Failed to initialize media keys for EME",code:3})})},t.handleWaitingForKey_=function(){this.logger_("waitingforkey fired, attempting to create any new key sessions"),this.createKeySessions_()},t.setupEme_=function(){var t=this,e=this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader,e=Cc({player:this.player_,sourceKeySystems:this.source_.keySystems,media:this.playlists.media(),audioMedia:e&&e.media()});this.player_.tech_.on("keystatuschange",function(e){"output-restricted"===e.status&&t.masterPlaylistController_.blacklistCurrentPlaylist({playlist:t.masterPlaylistController_.media(),message:"DRM keystatus changed to "+e.status+". Playlist will fail to play. Check for HDCP content.",blacklistDuration:1/0})}),this.handleWaitingForKey_=this.handleWaitingForKey_.bind(this),this.player_.tech_.on("waitingforkey",this.handleWaitingForKey_),11!==tr.browser.IE_VERSION&&e?this.createKeySessions_():this.masterPlaylistController_.sourceUpdater_.initializedEme()},t.setupQualityLevels_=function(){var i=this,e=tr.players[this.tech_.options_.playerId];e&&e.qualityLevels&&!this.qualityLevels_&&(this.qualityLevels_=e.qualityLevels(),this.masterPlaylistController_.on("selectedinitialmedia",function(){var t,e;t=i.qualityLevels_,(e=i).representations().forEach(function(e){t.addQualityLevel(e)}),wc(t,e.playlists)}),this.playlists.on("mediachange",function(){wc(i.qualityLevels_,i.playlists)}))},e.version=function(){return{"@videojs/http-streaming":"2.13.1","mux.js":"6.0.1","mpd-parser":"0.21.0","m3u8-parser":"4.7.0","aes-decrypter":"3.1.2"}},t.version=function(){return this.constructor.version()},t.canChangeType=function(){return sc.canChangeType()},t.play=function(){this.masterPlaylistController_.play()},t.setCurrentTime=function(e){this.masterPlaylistController_.setCurrentTime(e)},t.duration=function(){return this.masterPlaylistController_.duration()},t.seekable=function(){return this.masterPlaylistController_.seekable()},t.dispose=function(){this.playbackWatcher_&&this.playbackWatcher_.dispose(),this.masterPlaylistController_&&this.masterPlaylistController_.dispose(),this.qualityLevels_&&this.qualityLevels_.dispose(),this.player_&&(delete this.player_.vhs,delete this.player_.dash,delete this.player_.hls),this.tech_&&this.tech_.vhs&&delete this.tech_.vhs,this.tech_&&delete this.tech_.hls,this.mediaSourceUrl_&&window.URL.revokeObjectURL&&(window.URL.revokeObjectURL(this.mediaSourceUrl_),this.mediaSourceUrl_=null),this.tech_&&this.tech_.off("waitingforkey",this.handleWaitingForKey_),r.prototype.dispose.call(this)},t.convertToProgramTime=function(e,t){return wu({playlist:this.masterPlaylistController_.media(),time:e,callback:t})},t.seekToProgramTime=function(e,t,i,n){return void 0===i&&(i=!0),void 0===n&&(n=2),Eu({programTime:e,playlist:this.masterPlaylistController_.media(),retryCount:n,pauseAfterSeek:i,seekTo:this.options_.seekTo,tech:this.options_.tech,callback:t})},e}(tr.getComponent("Component")),Ac={name:"videojs-http-streaming",VERSION:"2.13.1",canHandleSource:function(e,t){t=tr.mergeOptions(tr.options,t=void 0===t?{}:t);return Ac.canPlayType(e.type,t)},handleSource:function(e,t,i){i=tr.mergeOptions(tr.options,i=void 0===i?{}:i);return t.vhs=new xc(e,t,i),tr.hasOwnProperty("hls")||Object.defineProperty(t,"hls",{get:function(){return tr.log.warn("player.tech().hls is deprecated. Use player.tech().vhs instead."),t.vhs},configurable:!0}),t.vhs.xhr=mu(),t.vhs.src(e.src,e.type),t.vhs},canPlayType:function(e,t){var i=tr.mergeOptions(tr.options,t=void 0===t?{}:t),t=i.vhs,t=(t=void 0===t?{}:t).overrideNative,t=void 0===t?!tr.browser.IS_ANY_SAFARI:t,i=i.hls,i=(i=void 0===i?{}:i).overrideNative,i=void 0!==i&&i,e=vr(e);return e&&(!Sc.supportsTypeNatively(e)||i||t)?"maybe":""}};return gr("avc1.4d400d,mp4a.40.2")&&tr.getTech("Html5").registerSourceHandler(Ac,0),tr.VhsHandler=xc,Object.defineProperty(tr,"HlsHandler",{get:function(){return tr.log.warn("videojs.HlsHandler is deprecated. Use videojs.VhsHandler instead."),xc},configurable:!0}),tr.VhsSourceHandler=Ac,Object.defineProperty(tr,"HlsSourceHandler",{get:function(){return tr.log.warn("videojs.HlsSourceHandler is deprecated. Use videojs.VhsSourceHandler instead."),Ac},configurable:!0}),tr.Vhs=Sc,Object.defineProperty(tr,"Hls",{get:function(){return tr.log.warn("videojs.Hls is deprecated. Use videojs.Vhs instead."),Sc},configurable:!0}),tr.use||(tr.registerComponent("Hls",Sc),tr.registerComponent("Vhs",Sc)),tr.options.vhs=tr.options.vhs||{},tr.options.hls=tr.options.hls||{},tr.getPlugin&&tr.getPlugin("reloadSourceOnError")||(tr.registerPlugin||tr.plugin)("reloadSourceOnError",function(e){Xl(this,e)}),tr});
 !function(){!function(a){var b=a&&a.videojs;b&&(b.CDN_VERSION="7.18.1")}(window)}();
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/admin/lib/videojs-vr/videojs-vr.js?ver=1 
/*! @name videojs-vr @version 1.7.2 @license Apache-2.0 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('global/window'), require('global/document'), require('video.js')) :
	typeof define === 'function' && define.amd ? define(['global/window', 'global/document', 'video.js'], factory) :
	(global = global || self, global.videojsVr = factory(global.window, global.document, global.videojs));
  }(this, (function (window$1, document$1, videojs) { 'use strict';
  
	window$1 = window$1 && window$1.hasOwnProperty('default') ? window$1['default'] : window$1;
	document$1 = document$1 && document$1.hasOwnProperty('default') ? document$1['default'] : document$1;
	videojs = videojs && videojs.hasOwnProperty('default') ? videojs['default'] : videojs;
  
	function _assertThisInitialized(self) {
	  if (self === void 0) {
		throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
	  }
  
	  return self;
	}
  
	var assertThisInitialized = _assertThisInitialized;
  
	function _inheritsLoose(subClass, superClass) {
	  subClass.prototype = Object.create(superClass.prototype);
	  subClass.prototype.constructor = subClass;
	  subClass.__proto__ = superClass;
	}
  
	var inheritsLoose = _inheritsLoose;
  
	var version = "1.7.2";
  
	var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
  
	function unwrapExports (x) {
		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
	}
  
	function createCommonjsModule(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}
  
	var webvrPolyfill = createCommonjsModule(function (module, exports) {
	/**
	 * @license
	 * webvr-polyfill
	 * Copyright (c) 2015-2017 Google
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */
  
	/**
	 * @license
	 * cardboard-vr-display
	 * Copyright (c) 2015-2017 Google
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */
  
	/**
	 * @license
	 * webvr-polyfill-dpdb 
	 * Copyright (c) 2017 Google
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */
  
	/**
	 * @license
	 * wglu-preserve-state
	 * Copyright (c) 2016, Brandon Jones.
	 *
	 * Permission is hereby granted, free of charge, to any person obtaining a copy
	 * of this software and associated documentation files (the "Software"), to deal
	 * in the Software without restriction, including without limitation the rights
	 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	 * copies of the Software, and to permit persons to whom the Software is
	 * furnished to do so, subject to the following conditions:
	 *
	 * The above copyright notice and this permission notice shall be included in
	 * all copies or substantial portions of the Software.
	 *
	 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	 * THE SOFTWARE.
	 */
  
	/**
	 * @license
	 * nosleep.js
	 * Copyright (c) 2017, Rich Tibbett
	 *
	 * Permission is hereby granted, free of charge, to any person obtaining a copy
	 * of this software and associated documentation files (the "Software"), to deal
	 * in the Software without restriction, including without limitation the rights
	 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	 * copies of the Software, and to permit persons to whom the Software is
	 * furnished to do so, subject to the following conditions:
	 *
	 * The above copyright notice and this permission notice shall be included in
	 * all copies or substantial portions of the Software.
	 *
	 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	 * THE SOFTWARE.
	 */
  
	(function (global, factory) {
		 module.exports = factory() ;
	}(commonjsGlobal, (function () {
	var commonjsGlobal$1 = typeof window !== 'undefined' ? window : typeof commonjsGlobal !== 'undefined' ? commonjsGlobal : typeof self !== 'undefined' ? self : {};
  
  
  
	function unwrapExports (x) {
		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
	}
  
	function createCommonjsModule(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}
  
	var race = function race(promises) {
	  if (Promise.race) {
		return Promise.race(promises);
	  }
	  return new Promise(function (resolve, reject) {
		for (var i = 0; i < promises.length; i++) {
		  promises[i].then(resolve, reject);
		}
	  });
	};
  
	var isMobile = function isMobile() {
	  return (/Android/i.test(navigator.userAgent) || /iPhone|iPad|iPod/i.test(navigator.userAgent)
	  );
	};
	var copyArray = function copyArray(source, dest) {
	  for (var i = 0, n = source.length; i < n; i++) {
		dest[i] = source[i];
	  }
	};
	var extend = function extend(dest, src) {
	  for (var key in src) {
		if (src.hasOwnProperty(key)) {
		  dest[key] = src[key];
		}
	  }
	  return dest;
	};
  
	var cardboardVrDisplay = createCommonjsModule(function (module, exports) {
	/**
	 * @license
	 * cardboard-vr-display
	 * Copyright (c) 2015-2017 Google
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */
	/**
	 * @license
	 * gl-preserve-state
	 * Copyright (c) 2016, Brandon Jones.
	 *
	 * Permission is hereby granted, free of charge, to any person obtaining a copy
	 * of this software and associated documentation files (the "Software"), to deal
	 * in the Software without restriction, including without limitation the rights
	 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	 * copies of the Software, and to permit persons to whom the Software is
	 * furnished to do so, subject to the following conditions:
	 *
	 * The above copyright notice and this permission notice shall be included in
	 * all copies or substantial portions of the Software.
	 *
	 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	 * THE SOFTWARE.
	 */
	/**
	 * @license
	 * webvr-polyfill-dpdb
	 * Copyright (c) 2015-2017 Google
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */
	/**
	 * @license
	 * nosleep.js
	 * Copyright (c) 2017, Rich Tibbett
	 *
	 * Permission is hereby granted, free of charge, to any person obtaining a copy
	 * of this software and associated documentation files (the "Software"), to deal
	 * in the Software without restriction, including without limitation the rights
	 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	 * copies of the Software, and to permit persons to whom the Software is
	 * furnished to do so, subject to the following conditions:
	 *
	 * The above copyright notice and this permission notice shall be included in
	 * all copies or substantial portions of the Software.
	 *
	 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	 * THE SOFTWARE.
	 */
	(function (global, factory) {
		module.exports = factory();
	}(commonjsGlobal$1, (function () { var classCallCheck = function (instance, Constructor) {
	  if (!(instance instanceof Constructor)) {
		throw new TypeError("Cannot call a class as a function");
	  }
	};
	var createClass = function () {
	  function defineProperties(target, props) {
		for (var i = 0; i < props.length; i++) {
		  var descriptor = props[i];
		  descriptor.enumerable = descriptor.enumerable || false;
		  descriptor.configurable = true;
		  if ("value" in descriptor) descriptor.writable = true;
		  Object.defineProperty(target, descriptor.key, descriptor);
		}
	  }
	  return function (Constructor, protoProps, staticProps) {
		if (protoProps) defineProperties(Constructor.prototype, protoProps);
		if (staticProps) defineProperties(Constructor, staticProps);
		return Constructor;
	  };
	}();
	var slicedToArray = function () {
	  function sliceIterator(arr, i) {
		var _arr = [];
		var _n = true;
		var _d = false;
		var _e = undefined;
		try {
		  for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
			_arr.push(_s.value);
			if (i && _arr.length === i) break;
		  }
		} catch (err) {
		  _d = true;
		  _e = err;
		} finally {
		  try {
			if (!_n && _i["return"]) _i["return"]();
		  } finally {
			if (_d) throw _e;
		  }
		}
		return _arr;
	  }
	  return function (arr, i) {
		if (Array.isArray(arr)) {
		  return arr;
		} else if (Symbol.iterator in Object(arr)) {
		  return sliceIterator(arr, i);
		} else {
		  throw new TypeError("Invalid attempt to destructure non-iterable instance");
		}
	  };
	}();
	var MIN_TIMESTEP = 0.001;
	var MAX_TIMESTEP = 1;
	var base64 = function base64(mimeType, _base) {
	  return 'data:' + mimeType + ';base64,' + _base;
	};
	var lerp = function lerp(a, b, t) {
	  return a + (b - a) * t;
	};
	var isIOS = function () {
	  var isIOS = /iPad|iPhone|iPod/.test(navigator.platform);
	  return function () {
		return isIOS;
	  };
	}();
	var isWebViewAndroid = function () {
	  var isWebViewAndroid = navigator.userAgent.indexOf('Version') !== -1 && navigator.userAgent.indexOf('Android') !== -1 && navigator.userAgent.indexOf('Chrome') !== -1;
	  return function () {
		return isWebViewAndroid;
	  };
	}();
	var isSafari = function () {
	  var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
	  return function () {
		return isSafari;
	  };
	}();
	var isFirefoxAndroid = function () {
	  var isFirefoxAndroid = navigator.userAgent.indexOf('Firefox') !== -1 && navigator.userAgent.indexOf('Android') !== -1;
	  return function () {
		return isFirefoxAndroid;
	  };
	}();
	var getChromeVersion = function () {
	  var match = navigator.userAgent.match(/.*Chrome\/([0-9]+)/);
	  var value = match ? parseInt(match[1], 10) : null;
	  return function () {
		return value;
	  };
	}();
	var isChromeWithoutDeviceMotion = function () {
	  var value = false;
	  if (getChromeVersion() === 65) {
		var match = navigator.userAgent.match(/.*Chrome\/([0-9\.]*)/);
		if (match) {
		  var _match$1$split = match[1].split('.'),
			  _match$1$split2 = slicedToArray(_match$1$split, 4),
			  major = _match$1$split2[0],
			  minor = _match$1$split2[1],
			  branch = _match$1$split2[2],
			  build = _match$1$split2[3];
		  value = parseInt(branch, 10) === 3325 && parseInt(build, 10) < 148;
		}
	  }
	  return function () {
		return value;
	  };
	}();
	var isR7 = function () {
	  var isR7 = navigator.userAgent.indexOf('R7 Build') !== -1;
	  return function () {
		return isR7;
	  };
	}();
	var isLandscapeMode = function isLandscapeMode() {
	  var rtn = window.orientation == 90 || window.orientation == -90;
	  return isR7() ? !rtn : rtn;
	};
	var isTimestampDeltaValid = function isTimestampDeltaValid(timestampDeltaS) {
	  if (isNaN(timestampDeltaS)) {
		return false;
	  }
	  if (timestampDeltaS <= MIN_TIMESTEP) {
		return false;
	  }
	  if (timestampDeltaS > MAX_TIMESTEP) {
		return false;
	  }
	  return true;
	};
	var getScreenWidth = function getScreenWidth() {
	  return Math.max(window.screen.width, window.screen.height) * window.devicePixelRatio;
	};
	var getScreenHeight = function getScreenHeight() {
	  return Math.min(window.screen.width, window.screen.height) * window.devicePixelRatio;
	};
	var requestFullscreen = function requestFullscreen(element) {
	  if (isWebViewAndroid()) {
		return false;
	  }
	  if (element.requestFullscreen) {
		element.requestFullscreen();
	  } else if (element.webkitRequestFullscreen) {
		element.webkitRequestFullscreen();
	  } else if (element.mozRequestFullScreen) {
		element.mozRequestFullScreen();
	  } else if (element.msRequestFullscreen) {
		element.msRequestFullscreen();
	  } else {
		return false;
	  }
	  return true;
	};
	var exitFullscreen = function exitFullscreen() {
	  if (document.exitFullscreen) {
		document.exitFullscreen();
	  } else if (document.webkitExitFullscreen) {
		document.webkitExitFullscreen();
	  } else if (document.mozCancelFullScreen) {
		document.mozCancelFullScreen();
	  } else if (document.msExitFullscreen) {
		document.msExitFullscreen();
	  } else {
		return false;
	  }
	  return true;
	};
	var getFullscreenElement = function getFullscreenElement() {
	  return document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;
	};
	var linkProgram = function linkProgram(gl, vertexSource, fragmentSource, attribLocationMap) {
	  var vertexShader = gl.createShader(gl.VERTEX_SHADER);
	  gl.shaderSource(vertexShader, vertexSource);
	  gl.compileShader(vertexShader);
	  var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
	  gl.shaderSource(fragmentShader, fragmentSource);
	  gl.compileShader(fragmentShader);
	  var program = gl.createProgram();
	  gl.attachShader(program, vertexShader);
	  gl.attachShader(program, fragmentShader);
	  for (var attribName in attribLocationMap) {
		gl.bindAttribLocation(program, attribLocationMap[attribName], attribName);
	  }gl.linkProgram(program);
	  gl.deleteShader(vertexShader);
	  gl.deleteShader(fragmentShader);
	  return program;
	};
	var getProgramUniforms = function getProgramUniforms(gl, program) {
	  var uniforms = {};
	  var uniformCount = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);
	  var uniformName = '';
	  for (var i = 0; i < uniformCount; i++) {
		var uniformInfo = gl.getActiveUniform(program, i);
		uniformName = uniformInfo.name.replace('[0]', '');
		uniforms[uniformName] = gl.getUniformLocation(program, uniformName);
	  }
	  return uniforms;
	};
	var orthoMatrix = function orthoMatrix(out, left, right, bottom, top, near, far) {
	  var lr = 1 / (left - right),
		  bt = 1 / (bottom - top),
		  nf = 1 / (near - far);
	  out[0] = -2 * lr;
	  out[1] = 0;
	  out[2] = 0;
	  out[3] = 0;
	  out[4] = 0;
	  out[5] = -2 * bt;
	  out[6] = 0;
	  out[7] = 0;
	  out[8] = 0;
	  out[9] = 0;
	  out[10] = 2 * nf;
	  out[11] = 0;
	  out[12] = (left + right) * lr;
	  out[13] = (top + bottom) * bt;
	  out[14] = (far + near) * nf;
	  out[15] = 1;
	  return out;
	};
	var isMobile = function isMobile() {
	  var check = false;
	  (function (a) {
		if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4))) check = true;
	  })(navigator.userAgent || navigator.vendor || window.opera);
	  return check;
	};
	var extend = function extend(dest, src) {
	  for (var key in src) {
		if (src.hasOwnProperty(key)) {
		  dest[key] = src[key];
		}
	  }
	  return dest;
	};
	var safariCssSizeWorkaround = function safariCssSizeWorkaround(canvas) {
	  if (isIOS()) {
		var width = canvas.style.width;
		var height = canvas.style.height;
		canvas.style.width = parseInt(width) + 1 + 'px';
		canvas.style.height = parseInt(height) + 'px';
		setTimeout(function () {
		  canvas.style.width = width;
		  canvas.style.height = height;
		}, 100);
	  }
	  window.canvas = canvas;
	};
	var frameDataFromPose = function () {
	  var piOver180 = Math.PI / 180.0;
	  var rad45 = Math.PI * 0.25;
	  function mat4_perspectiveFromFieldOfView(out, fov, near, far) {
		var upTan = Math.tan(fov ? fov.upDegrees * piOver180 : rad45),
			downTan = Math.tan(fov ? fov.downDegrees * piOver180 : rad45),
			leftTan = Math.tan(fov ? fov.leftDegrees * piOver180 : rad45),
			rightTan = Math.tan(fov ? fov.rightDegrees * piOver180 : rad45),
			xScale = 2.0 / (leftTan + rightTan),
			yScale = 2.0 / (upTan + downTan);
		out[0] = xScale;
		out[1] = 0.0;
		out[2] = 0.0;
		out[3] = 0.0;
		out[4] = 0.0;
		out[5] = yScale;
		out[6] = 0.0;
		out[7] = 0.0;
		out[8] = -((leftTan - rightTan) * xScale * 0.5);
		out[9] = (upTan - downTan) * yScale * 0.5;
		out[10] = far / (near - far);
		out[11] = -1.0;
		out[12] = 0.0;
		out[13] = 0.0;
		out[14] = far * near / (near - far);
		out[15] = 0.0;
		return out;
	  }
	  function mat4_fromRotationTranslation(out, q, v) {
		var x = q[0],
			y = q[1],
			z = q[2],
			w = q[3],
			x2 = x + x,
			y2 = y + y,
			z2 = z + z,
			xx = x * x2,
			xy = x * y2,
			xz = x * z2,
			yy = y * y2,
			yz = y * z2,
			zz = z * z2,
			wx = w * x2,
			wy = w * y2,
			wz = w * z2;
		out[0] = 1 - (yy + zz);
		out[1] = xy + wz;
		out[2] = xz - wy;
		out[3] = 0;
		out[4] = xy - wz;
		out[5] = 1 - (xx + zz);
		out[6] = yz + wx;
		out[7] = 0;
		out[8] = xz + wy;
		out[9] = yz - wx;
		out[10] = 1 - (xx + yy);
		out[11] = 0;
		out[12] = v[0];
		out[13] = v[1];
		out[14] = v[2];
		out[15] = 1;
		return out;
	  }
	  function mat4_translate(out, a, v) {
		var x = v[0],
			y = v[1],
			z = v[2],
			a00,
			a01,
			a02,
			a03,
			a10,
			a11,
			a12,
			a13,
			a20,
			a21,
			a22,
			a23;
		if (a === out) {
		  out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
		  out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
		  out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
		  out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
		} else {
		  a00 = a[0];a01 = a[1];a02 = a[2];a03 = a[3];
		  a10 = a[4];a11 = a[5];a12 = a[6];a13 = a[7];
		  a20 = a[8];a21 = a[9];a22 = a[10];a23 = a[11];
		  out[0] = a00;out[1] = a01;out[2] = a02;out[3] = a03;
		  out[4] = a10;out[5] = a11;out[6] = a12;out[7] = a13;
		  out[8] = a20;out[9] = a21;out[10] = a22;out[11] = a23;
		  out[12] = a00 * x + a10 * y + a20 * z + a[12];
		  out[13] = a01 * x + a11 * y + a21 * z + a[13];
		  out[14] = a02 * x + a12 * y + a22 * z + a[14];
		  out[15] = a03 * x + a13 * y + a23 * z + a[15];
		}
		return out;
	  }
	  function mat4_invert(out, a) {
		var a00 = a[0],
			a01 = a[1],
			a02 = a[2],
			a03 = a[3],
			a10 = a[4],
			a11 = a[5],
			a12 = a[6],
			a13 = a[7],
			a20 = a[8],
			a21 = a[9],
			a22 = a[10],
			a23 = a[11],
			a30 = a[12],
			a31 = a[13],
			a32 = a[14],
			a33 = a[15],
			b00 = a00 * a11 - a01 * a10,
			b01 = a00 * a12 - a02 * a10,
			b02 = a00 * a13 - a03 * a10,
			b03 = a01 * a12 - a02 * a11,
			b04 = a01 * a13 - a03 * a11,
			b05 = a02 * a13 - a03 * a12,
			b06 = a20 * a31 - a21 * a30,
			b07 = a20 * a32 - a22 * a30,
			b08 = a20 * a33 - a23 * a30,
			b09 = a21 * a32 - a22 * a31,
			b10 = a21 * a33 - a23 * a31,
			b11 = a22 * a33 - a23 * a32,
		det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
		if (!det) {
		  return null;
		}
		det = 1.0 / det;
		out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
		out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
		out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
		out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;
		out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
		out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
		out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
		out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;
		out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
		out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
		out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
		out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;
		out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;
		out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;
		out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;
		out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;
		return out;
	  }
	  var defaultOrientation = new Float32Array([0, 0, 0, 1]);
	  var defaultPosition = new Float32Array([0, 0, 0]);
	  function updateEyeMatrices(projection, view, pose, fov, offset, vrDisplay) {
		mat4_perspectiveFromFieldOfView(projection, fov || null, vrDisplay.depthNear, vrDisplay.depthFar);
		var orientation = pose.orientation || defaultOrientation;
		var position = pose.position || defaultPosition;
		mat4_fromRotationTranslation(view, orientation, position);
		if (offset) mat4_translate(view, view, offset);
		mat4_invert(view, view);
	  }
	  return function (frameData, pose, vrDisplay) {
		if (!frameData || !pose) return false;
		frameData.pose = pose;
		frameData.timestamp = pose.timestamp;
		updateEyeMatrices(frameData.leftProjectionMatrix, frameData.leftViewMatrix, pose, vrDisplay._getFieldOfView("left"), vrDisplay._getEyeOffset("left"), vrDisplay);
		updateEyeMatrices(frameData.rightProjectionMatrix, frameData.rightViewMatrix, pose, vrDisplay._getFieldOfView("right"), vrDisplay._getEyeOffset("right"), vrDisplay);
		return true;
	  };
	}();
	var isInsideCrossOriginIFrame = function isInsideCrossOriginIFrame() {
	  var isFramed = window.self !== window.top;
	  var refOrigin = getOriginFromUrl(document.referrer);
	  var thisOrigin = getOriginFromUrl(window.location.href);
	  return isFramed && refOrigin !== thisOrigin;
	};
	var getOriginFromUrl = function getOriginFromUrl(url) {
	  var domainIdx;
	  var protoSepIdx = url.indexOf("://");
	  if (protoSepIdx !== -1) {
		domainIdx = protoSepIdx + 3;
	  } else {
		domainIdx = 0;
	  }
	  var domainEndIdx = url.indexOf('/', domainIdx);
	  if (domainEndIdx === -1) {
		domainEndIdx = url.length;
	  }
	  return url.substring(0, domainEndIdx);
	};
	var getQuaternionAngle = function getQuaternionAngle(quat) {
	  if (quat.w > 1) {
		console.warn('getQuaternionAngle: w > 1');
		return 0;
	  }
	  var angle = 2 * Math.acos(quat.w);
	  return angle;
	};
	var warnOnce = function () {
	  var observedWarnings = {};
	  return function (key, message) {
		if (observedWarnings[key] === undefined) {
		  console.warn('webvr-polyfill: ' + message);
		  observedWarnings[key] = true;
		}
	  };
	}();
	var deprecateWarning = function deprecateWarning(deprecated, suggested) {
	  var alternative = suggested ? 'Please use ' + suggested + ' instead.' : '';
	  warnOnce(deprecated, deprecated + ' has been deprecated. ' + 'This may not work on native WebVR displays. ' + alternative);
	};
	function WGLUPreserveGLState(gl, bindings, callback) {
	  if (!bindings) {
		callback(gl);
		return;
	  }
	  var boundValues = [];
	  var activeTexture = null;
	  for (var i = 0; i < bindings.length; ++i) {
		var binding = bindings[i];
		switch (binding) {
		  case gl.TEXTURE_BINDING_2D:
		  case gl.TEXTURE_BINDING_CUBE_MAP:
			var textureUnit = bindings[++i];
			if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31) {
			  console.error("TEXTURE_BINDING_2D or TEXTURE_BINDING_CUBE_MAP must be followed by a valid texture unit");
			  boundValues.push(null, null);
			  break;
			}
			if (!activeTexture) {
			  activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);
			}
			gl.activeTexture(textureUnit);
			boundValues.push(gl.getParameter(binding), null);
			break;
		  case gl.ACTIVE_TEXTURE:
			activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);
			boundValues.push(null);
			break;
		  default:
			boundValues.push(gl.getParameter(binding));
			break;
		}
	  }
	  callback(gl);
	  for (var i = 0; i < bindings.length; ++i) {
		var binding = bindings[i];
		var boundValue = boundValues[i];
		switch (binding) {
		  case gl.ACTIVE_TEXTURE:
			break;
		  case gl.ARRAY_BUFFER_BINDING:
			gl.bindBuffer(gl.ARRAY_BUFFER, boundValue);
			break;
		  case gl.COLOR_CLEAR_VALUE:
			gl.clearColor(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
			break;
		  case gl.COLOR_WRITEMASK:
			gl.colorMask(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
			break;
		  case gl.CURRENT_PROGRAM:
			gl.useProgram(boundValue);
			break;
		  case gl.ELEMENT_ARRAY_BUFFER_BINDING:
			gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, boundValue);
			break;
		  case gl.FRAMEBUFFER_BINDING:
			gl.bindFramebuffer(gl.FRAMEBUFFER, boundValue);
			break;
		  case gl.RENDERBUFFER_BINDING:
			gl.bindRenderbuffer(gl.RENDERBUFFER, boundValue);
			break;
		  case gl.TEXTURE_BINDING_2D:
			var textureUnit = bindings[++i];
			if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)
			  break;
			gl.activeTexture(textureUnit);
			gl.bindTexture(gl.TEXTURE_2D, boundValue);
			break;
		  case gl.TEXTURE_BINDING_CUBE_MAP:
			var textureUnit = bindings[++i];
			if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)
			  break;
			gl.activeTexture(textureUnit);
			gl.bindTexture(gl.TEXTURE_CUBE_MAP, boundValue);
			break;
		  case gl.VIEWPORT:
			gl.viewport(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);
			break;
		  case gl.BLEND:
		  case gl.CULL_FACE:
		  case gl.DEPTH_TEST:
		  case gl.SCISSOR_TEST:
		  case gl.STENCIL_TEST:
			if (boundValue) {
			  gl.enable(binding);
			} else {
			  gl.disable(binding);
			}
			break;
		  default:
			console.log("No GL restore behavior for 0x" + binding.toString(16));
			break;
		}
		if (activeTexture) {
		  gl.activeTexture(activeTexture);
		}
	  }
	}
	var glPreserveState = WGLUPreserveGLState;
	var distortionVS = ['attribute vec2 position;', 'attribute vec3 texCoord;', 'varying vec2 vTexCoord;', 'uniform vec4 viewportOffsetScale[2];', 'void main() {', '  vec4 viewport = viewportOffsetScale[int(texCoord.z)];', '  vTexCoord = (texCoord.xy * viewport.zw) + viewport.xy;', '  gl_Position = vec4( position, 1.0, 1.0 );', '}'].join('\n');
	var distortionFS = ['precision mediump float;', 'uniform sampler2D diffuse;', 'varying vec2 vTexCoord;', 'void main() {', '  gl_FragColor = texture2D(diffuse, vTexCoord);', '}'].join('\n');
	function CardboardDistorter(gl, cardboardUI, bufferScale, dirtySubmitFrameBindings) {
	  this.gl = gl;
	  this.cardboardUI = cardboardUI;
	  this.bufferScale = bufferScale;
	  this.dirtySubmitFrameBindings = dirtySubmitFrameBindings;
	  this.ctxAttribs = gl.getContextAttributes();
	  this.meshWidth = 20;
	  this.meshHeight = 20;
	  this.bufferWidth = gl.drawingBufferWidth;
	  this.bufferHeight = gl.drawingBufferHeight;
	  this.realBindFramebuffer = gl.bindFramebuffer;
	  this.realEnable = gl.enable;
	  this.realDisable = gl.disable;
	  this.realColorMask = gl.colorMask;
	  this.realClearColor = gl.clearColor;
	  this.realViewport = gl.viewport;
	  if (!isIOS()) {
		this.realCanvasWidth = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'width');
		this.realCanvasHeight = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'height');
	  }
	  this.isPatched = false;
	  this.lastBoundFramebuffer = null;
	  this.cullFace = false;
	  this.depthTest = false;
	  this.blend = false;
	  this.scissorTest = false;
	  this.stencilTest = false;
	  this.viewport = [0, 0, 0, 0];
	  this.colorMask = [true, true, true, true];
	  this.clearColor = [0, 0, 0, 0];
	  this.attribs = {
		position: 0,
		texCoord: 1
	  };
	  this.program = linkProgram(gl, distortionVS, distortionFS, this.attribs);
	  this.uniforms = getProgramUniforms(gl, this.program);
	  this.viewportOffsetScale = new Float32Array(8);
	  this.setTextureBounds();
	  this.vertexBuffer = gl.createBuffer();
	  this.indexBuffer = gl.createBuffer();
	  this.indexCount = 0;
	  this.renderTarget = gl.createTexture();
	  this.framebuffer = gl.createFramebuffer();
	  this.depthStencilBuffer = null;
	  this.depthBuffer = null;
	  this.stencilBuffer = null;
	  if (this.ctxAttribs.depth && this.ctxAttribs.stencil) {
		this.depthStencilBuffer = gl.createRenderbuffer();
	  } else if (this.ctxAttribs.depth) {
		this.depthBuffer = gl.createRenderbuffer();
	  } else if (this.ctxAttribs.stencil) {
		this.stencilBuffer = gl.createRenderbuffer();
	  }
	  this.patch();
	  this.onResize();
	}
	CardboardDistorter.prototype.destroy = function () {
	  var gl = this.gl;
	  this.unpatch();
	  gl.deleteProgram(this.program);
	  gl.deleteBuffer(this.vertexBuffer);
	  gl.deleteBuffer(this.indexBuffer);
	  gl.deleteTexture(this.renderTarget);
	  gl.deleteFramebuffer(this.framebuffer);
	  if (this.depthStencilBuffer) {
		gl.deleteRenderbuffer(this.depthStencilBuffer);
	  }
	  if (this.depthBuffer) {
		gl.deleteRenderbuffer(this.depthBuffer);
	  }
	  if (this.stencilBuffer) {
		gl.deleteRenderbuffer(this.stencilBuffer);
	  }
	  if (this.cardboardUI) {
		this.cardboardUI.destroy();
	  }
	};
	CardboardDistorter.prototype.onResize = function () {
	  var gl = this.gl;
	  var self = this;
	  var glState = [gl.RENDERBUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0];
	  glPreserveState(gl, glState, function (gl) {
		self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);
		if (self.scissorTest) {
		  self.realDisable.call(gl, gl.SCISSOR_TEST);
		}
		self.realColorMask.call(gl, true, true, true, true);
		self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
		self.realClearColor.call(gl, 0, 0, 0, 1);
		gl.clear(gl.COLOR_BUFFER_BIT);
		self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.framebuffer);
		gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);
		gl.texImage2D(gl.TEXTURE_2D, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, self.bufferWidth, self.bufferHeight, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, gl.UNSIGNED_BYTE, null);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
		gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, self.renderTarget, 0);
		if (self.ctxAttribs.depth && self.ctxAttribs.stencil) {
		  gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthStencilBuffer);
		  gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, self.bufferWidth, self.bufferHeight);
		  gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.depthStencilBuffer);
		} else if (self.ctxAttribs.depth) {
		  gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthBuffer);
		  gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, self.bufferWidth, self.bufferHeight);
		  gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, self.depthBuffer);
		} else if (self.ctxAttribs.stencil) {
		  gl.bindRenderbuffer(gl.RENDERBUFFER, self.stencilBuffer);
		  gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, self.bufferWidth, self.bufferHeight);
		  gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.stencilBuffer);
		}
		if (!gl.checkFramebufferStatus(gl.FRAMEBUFFER) === gl.FRAMEBUFFER_COMPLETE) {
		  console.error('Framebuffer incomplete!');
		}
		self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);
		if (self.scissorTest) {
		  self.realEnable.call(gl, gl.SCISSOR_TEST);
		}
		self.realColorMask.apply(gl, self.colorMask);
		self.realViewport.apply(gl, self.viewport);
		self.realClearColor.apply(gl, self.clearColor);
	  });
	  if (this.cardboardUI) {
		this.cardboardUI.onResize();
	  }
	};
	CardboardDistorter.prototype.patch = function () {
	  if (this.isPatched) {
		return;
	  }
	  var self = this;
	  var canvas = this.gl.canvas;
	  var gl = this.gl;
	  if (!isIOS()) {
		canvas.width = getScreenWidth() * this.bufferScale;
		canvas.height = getScreenHeight() * this.bufferScale;
		Object.defineProperty(canvas, 'width', {
		  configurable: true,
		  enumerable: true,
		  get: function get() {
			return self.bufferWidth;
		  },
		  set: function set(value) {
			self.bufferWidth = value;
			self.realCanvasWidth.set.call(canvas, value);
			self.onResize();
		  }
		});
		Object.defineProperty(canvas, 'height', {
		  configurable: true,
		  enumerable: true,
		  get: function get() {
			return self.bufferHeight;
		  },
		  set: function set(value) {
			self.bufferHeight = value;
			self.realCanvasHeight.set.call(canvas, value);
			self.onResize();
		  }
		});
	  }
	  this.lastBoundFramebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);
	  if (this.lastBoundFramebuffer == null) {
		this.lastBoundFramebuffer = this.framebuffer;
		this.gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);
	  }
	  this.gl.bindFramebuffer = function (target, framebuffer) {
		self.lastBoundFramebuffer = framebuffer ? framebuffer : self.framebuffer;
		self.realBindFramebuffer.call(gl, target, self.lastBoundFramebuffer);
	  };
	  this.cullFace = gl.getParameter(gl.CULL_FACE);
	  this.depthTest = gl.getParameter(gl.DEPTH_TEST);
	  this.blend = gl.getParameter(gl.BLEND);
	  this.scissorTest = gl.getParameter(gl.SCISSOR_TEST);
	  this.stencilTest = gl.getParameter(gl.STENCIL_TEST);
	  gl.enable = function (pname) {
		switch (pname) {
		  case gl.CULL_FACE:
			self.cullFace = true;break;
		  case gl.DEPTH_TEST:
			self.depthTest = true;break;
		  case gl.BLEND:
			self.blend = true;break;
		  case gl.SCISSOR_TEST:
			self.scissorTest = true;break;
		  case gl.STENCIL_TEST:
			self.stencilTest = true;break;
		}
		self.realEnable.call(gl, pname);
	  };
	  gl.disable = function (pname) {
		switch (pname) {
		  case gl.CULL_FACE:
			self.cullFace = false;break;
		  case gl.DEPTH_TEST:
			self.depthTest = false;break;
		  case gl.BLEND:
			self.blend = false;break;
		  case gl.SCISSOR_TEST:
			self.scissorTest = false;break;
		  case gl.STENCIL_TEST:
			self.stencilTest = false;break;
		}
		self.realDisable.call(gl, pname);
	  };
	  this.colorMask = gl.getParameter(gl.COLOR_WRITEMASK);
	  gl.colorMask = function (r, g, b, a) {
		self.colorMask[0] = r;
		self.colorMask[1] = g;
		self.colorMask[2] = b;
		self.colorMask[3] = a;
		self.realColorMask.call(gl, r, g, b, a);
	  };
	  this.clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE);
	  gl.clearColor = function (r, g, b, a) {
		self.clearColor[0] = r;
		self.clearColor[1] = g;
		self.clearColor[2] = b;
		self.clearColor[3] = a;
		self.realClearColor.call(gl, r, g, b, a);
	  };
	  this.viewport = gl.getParameter(gl.VIEWPORT);
	  gl.viewport = function (x, y, w, h) {
		self.viewport[0] = x;
		self.viewport[1] = y;
		self.viewport[2] = w;
		self.viewport[3] = h;
		self.realViewport.call(gl, x, y, w, h);
	  };
	  this.isPatched = true;
	  safariCssSizeWorkaround(canvas);
	};
	CardboardDistorter.prototype.unpatch = function () {
	  if (!this.isPatched) {
		return;
	  }
	  var gl = this.gl;
	  var canvas = this.gl.canvas;
	  if (!isIOS()) {
		Object.defineProperty(canvas, 'width', this.realCanvasWidth);
		Object.defineProperty(canvas, 'height', this.realCanvasHeight);
	  }
	  canvas.width = this.bufferWidth;
	  canvas.height = this.bufferHeight;
	  gl.bindFramebuffer = this.realBindFramebuffer;
	  gl.enable = this.realEnable;
	  gl.disable = this.realDisable;
	  gl.colorMask = this.realColorMask;
	  gl.clearColor = this.realClearColor;
	  gl.viewport = this.realViewport;
	  if (this.lastBoundFramebuffer == this.framebuffer) {
		gl.bindFramebuffer(gl.FRAMEBUFFER, null);
	  }
	  this.isPatched = false;
	  setTimeout(function () {
		safariCssSizeWorkaround(canvas);
	  }, 1);
	};
	CardboardDistorter.prototype.setTextureBounds = function (leftBounds, rightBounds) {
	  if (!leftBounds) {
		leftBounds = [0, 0, 0.5, 1];
	  }
	  if (!rightBounds) {
		rightBounds = [0.5, 0, 0.5, 1];
	  }
	  this.viewportOffsetScale[0] = leftBounds[0];
	  this.viewportOffsetScale[1] = leftBounds[1];
	  this.viewportOffsetScale[2] = leftBounds[2];
	  this.viewportOffsetScale[3] = leftBounds[3];
	  this.viewportOffsetScale[4] = rightBounds[0];
	  this.viewportOffsetScale[5] = rightBounds[1];
	  this.viewportOffsetScale[6] = rightBounds[2];
	  this.viewportOffsetScale[7] = rightBounds[3];
	};
	CardboardDistorter.prototype.submitFrame = function () {
	  var gl = this.gl;
	  var self = this;
	  var glState = [];
	  if (!this.dirtySubmitFrameBindings) {
		glState.push(gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0);
	  }
	  glPreserveState(gl, glState, function (gl) {
		self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);
		if (self.cullFace) {
		  self.realDisable.call(gl, gl.CULL_FACE);
		}
		if (self.depthTest) {
		  self.realDisable.call(gl, gl.DEPTH_TEST);
		}
		if (self.blend) {
		  self.realDisable.call(gl, gl.BLEND);
		}
		if (self.scissorTest) {
		  self.realDisable.call(gl, gl.SCISSOR_TEST);
		}
		if (self.stencilTest) {
		  self.realDisable.call(gl, gl.STENCIL_TEST);
		}
		self.realColorMask.call(gl, true, true, true, true);
		self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
		if (self.ctxAttribs.alpha || isIOS()) {
		  self.realClearColor.call(gl, 0, 0, 0, 1);
		  gl.clear(gl.COLOR_BUFFER_BIT);
		}
		gl.useProgram(self.program);
		gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);
		gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
		gl.enableVertexAttribArray(self.attribs.position);
		gl.enableVertexAttribArray(self.attribs.texCoord);
		gl.vertexAttribPointer(self.attribs.position, 2, gl.FLOAT, false, 20, 0);
		gl.vertexAttribPointer(self.attribs.texCoord, 3, gl.FLOAT, false, 20, 8);
		gl.activeTexture(gl.TEXTURE0);
		gl.uniform1i(self.uniforms.diffuse, 0);
		gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);
		gl.uniform4fv(self.uniforms.viewportOffsetScale, self.viewportOffsetScale);
		gl.drawElements(gl.TRIANGLES, self.indexCount, gl.UNSIGNED_SHORT, 0);
		if (self.cardboardUI) {
		  self.cardboardUI.renderNoState();
		}
		self.realBindFramebuffer.call(self.gl, gl.FRAMEBUFFER, self.framebuffer);
		if (!self.ctxAttribs.preserveDrawingBuffer) {
		  self.realClearColor.call(gl, 0, 0, 0, 0);
		  gl.clear(gl.COLOR_BUFFER_BIT);
		}
		if (!self.dirtySubmitFrameBindings) {
		  self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);
		}
		if (self.cullFace) {
		  self.realEnable.call(gl, gl.CULL_FACE);
		}
		if (self.depthTest) {
		  self.realEnable.call(gl, gl.DEPTH_TEST);
		}
		if (self.blend) {
		  self.realEnable.call(gl, gl.BLEND);
		}
		if (self.scissorTest) {
		  self.realEnable.call(gl, gl.SCISSOR_TEST);
		}
		if (self.stencilTest) {
		  self.realEnable.call(gl, gl.STENCIL_TEST);
		}
		self.realColorMask.apply(gl, self.colorMask);
		self.realViewport.apply(gl, self.viewport);
		if (self.ctxAttribs.alpha || !self.ctxAttribs.preserveDrawingBuffer) {
		  self.realClearColor.apply(gl, self.clearColor);
		}
	  });
	  if (isIOS()) {
		var canvas = gl.canvas;
		if (canvas.width != self.bufferWidth || canvas.height != self.bufferHeight) {
		  self.bufferWidth = canvas.width;
		  self.bufferHeight = canvas.height;
		  self.onResize();
		}
	  }
	};
	CardboardDistorter.prototype.updateDeviceInfo = function (deviceInfo) {
	  var gl = this.gl;
	  var self = this;
	  var glState = [gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING];
	  glPreserveState(gl, glState, function (gl) {
		var vertices = self.computeMeshVertices_(self.meshWidth, self.meshHeight, deviceInfo);
		gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
		gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
		if (!self.indexCount) {
		  var indices = self.computeMeshIndices_(self.meshWidth, self.meshHeight);
		  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);
		  gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
		  self.indexCount = indices.length;
		}
	  });
	};
	CardboardDistorter.prototype.computeMeshVertices_ = function (width, height, deviceInfo) {
	  var vertices = new Float32Array(2 * width * height * 5);
	  var lensFrustum = deviceInfo.getLeftEyeVisibleTanAngles();
	  var noLensFrustum = deviceInfo.getLeftEyeNoLensTanAngles();
	  var viewport = deviceInfo.getLeftEyeVisibleScreenRect(noLensFrustum);
	  var vidx = 0;
	  for (var e = 0; e < 2; e++) {
		for (var j = 0; j < height; j++) {
		  for (var i = 0; i < width; i++, vidx++) {
			var u = i / (width - 1);
			var v = j / (height - 1);
			var s = u;
			var t = v;
			var x = lerp(lensFrustum[0], lensFrustum[2], u);
			var y = lerp(lensFrustum[3], lensFrustum[1], v);
			var d = Math.sqrt(x * x + y * y);
			var r = deviceInfo.distortion.distortInverse(d);
			var p = x * r / d;
			var q = y * r / d;
			u = (p - noLensFrustum[0]) / (noLensFrustum[2] - noLensFrustum[0]);
			v = (q - noLensFrustum[3]) / (noLensFrustum[1] - noLensFrustum[3]);
			u = (viewport.x + u * viewport.width - 0.5) * 2.0;
			v = (viewport.y + v * viewport.height - 0.5) * 2.0;
			vertices[vidx * 5 + 0] = u;
			vertices[vidx * 5 + 1] = v;
			vertices[vidx * 5 + 2] = s;
			vertices[vidx * 5 + 3] = t;
			vertices[vidx * 5 + 4] = e;
		  }
		}
		var w = lensFrustum[2] - lensFrustum[0];
		lensFrustum[0] = -(w + lensFrustum[0]);
		lensFrustum[2] = w - lensFrustum[2];
		w = noLensFrustum[2] - noLensFrustum[0];
		noLensFrustum[0] = -(w + noLensFrustum[0]);
		noLensFrustum[2] = w - noLensFrustum[2];
		viewport.x = 1 - (viewport.x + viewport.width);
	  }
	  return vertices;
	};
	CardboardDistorter.prototype.computeMeshIndices_ = function (width, height) {
	  var indices = new Uint16Array(2 * (width - 1) * (height - 1) * 6);
	  var halfwidth = width / 2;
	  var halfheight = height / 2;
	  var vidx = 0;
	  var iidx = 0;
	  for (var e = 0; e < 2; e++) {
		for (var j = 0; j < height; j++) {
		  for (var i = 0; i < width; i++, vidx++) {
			if (i == 0 || j == 0) continue;
			if (i <= halfwidth == j <= halfheight) {
			  indices[iidx++] = vidx;
			  indices[iidx++] = vidx - width - 1;
			  indices[iidx++] = vidx - width;
			  indices[iidx++] = vidx - width - 1;
			  indices[iidx++] = vidx;
			  indices[iidx++] = vidx - 1;
			} else {
			  indices[iidx++] = vidx - 1;
			  indices[iidx++] = vidx - width;
			  indices[iidx++] = vidx;
			  indices[iidx++] = vidx - width;
			  indices[iidx++] = vidx - 1;
			  indices[iidx++] = vidx - width - 1;
			}
		  }
		}
	  }
	  return indices;
	};
	CardboardDistorter.prototype.getOwnPropertyDescriptor_ = function (proto, attrName) {
	  var descriptor = Object.getOwnPropertyDescriptor(proto, attrName);
	  if (descriptor.get === undefined || descriptor.set === undefined) {
		descriptor.configurable = true;
		descriptor.enumerable = true;
		descriptor.get = function () {
		  return this.getAttribute(attrName);
		};
		descriptor.set = function (val) {
		  this.setAttribute(attrName, val);
		};
	  }
	  return descriptor;
	};
	var uiVS = ['attribute vec2 position;', 'uniform mat4 projectionMat;', 'void main() {', '  gl_Position = projectionMat * vec4( position, -1.0, 1.0 );', '}'].join('\n');
	var uiFS = ['precision mediump float;', 'uniform vec4 color;', 'void main() {', '  gl_FragColor = color;', '}'].join('\n');
	var DEG2RAD = Math.PI / 180.0;
	var kAnglePerGearSection = 60;
	var kOuterRimEndAngle = 12;
	var kInnerRimBeginAngle = 20;
	var kOuterRadius = 1;
	var kMiddleRadius = 0.75;
	var kInnerRadius = 0.3125;
	var kCenterLineThicknessDp = 4;
	var kButtonWidthDp = 28;
	var kTouchSlopFactor = 1.5;
	function CardboardUI(gl) {
	  this.gl = gl;
	  this.attribs = {
		position: 0
	  };
	  this.program = linkProgram(gl, uiVS, uiFS, this.attribs);
	  this.uniforms = getProgramUniforms(gl, this.program);
	  this.vertexBuffer = gl.createBuffer();
	  this.gearOffset = 0;
	  this.gearVertexCount = 0;
	  this.arrowOffset = 0;
	  this.arrowVertexCount = 0;
	  this.projMat = new Float32Array(16);
	  this.listener = null;
	  this.onResize();
	}
	CardboardUI.prototype.destroy = function () {
	  var gl = this.gl;
	  if (this.listener) {
		gl.canvas.removeEventListener('click', this.listener, false);
	  }
	  gl.deleteProgram(this.program);
	  gl.deleteBuffer(this.vertexBuffer);
	};
	CardboardUI.prototype.listen = function (optionsCallback, backCallback) {
	  var canvas = this.gl.canvas;
	  this.listener = function (event) {
		var midline = canvas.clientWidth / 2;
		var buttonSize = kButtonWidthDp * kTouchSlopFactor;
		if (event.clientX > midline - buttonSize && event.clientX < midline + buttonSize && event.clientY > canvas.clientHeight - buttonSize) {
		  optionsCallback(event);
		}
		else if (event.clientX < buttonSize && event.clientY < buttonSize) {
			backCallback(event);
		  }
	  };
	  canvas.addEventListener('click', this.listener, false);
	};
	CardboardUI.prototype.onResize = function () {
	  var gl = this.gl;
	  var self = this;
	  var glState = [gl.ARRAY_BUFFER_BINDING];
	  glPreserveState(gl, glState, function (gl) {
		var vertices = [];
		var midline = gl.drawingBufferWidth / 2;
		var physicalPixels = Math.max(screen.width, screen.height) * window.devicePixelRatio;
		var scalingRatio = gl.drawingBufferWidth / physicalPixels;
		var dps = scalingRatio * window.devicePixelRatio;
		var lineWidth = kCenterLineThicknessDp * dps / 2;
		var buttonSize = kButtonWidthDp * kTouchSlopFactor * dps;
		var buttonScale = kButtonWidthDp * dps / 2;
		var buttonBorder = (kButtonWidthDp * kTouchSlopFactor - kButtonWidthDp) * dps;
		vertices.push(midline - lineWidth, buttonSize);
		vertices.push(midline - lineWidth, gl.drawingBufferHeight);
		vertices.push(midline + lineWidth, buttonSize);
		vertices.push(midline + lineWidth, gl.drawingBufferHeight);
		self.gearOffset = vertices.length / 2;
		function addGearSegment(theta, r) {
		  var angle = (90 - theta) * DEG2RAD;
		  var x = Math.cos(angle);
		  var y = Math.sin(angle);
		  vertices.push(kInnerRadius * x * buttonScale + midline, kInnerRadius * y * buttonScale + buttonScale);
		  vertices.push(r * x * buttonScale + midline, r * y * buttonScale + buttonScale);
		}
		for (var i = 0; i <= 6; i++) {
		  var segmentTheta = i * kAnglePerGearSection;
		  addGearSegment(segmentTheta, kOuterRadius);
		  addGearSegment(segmentTheta + kOuterRimEndAngle, kOuterRadius);
		  addGearSegment(segmentTheta + kInnerRimBeginAngle, kMiddleRadius);
		  addGearSegment(segmentTheta + (kAnglePerGearSection - kInnerRimBeginAngle), kMiddleRadius);
		  addGearSegment(segmentTheta + (kAnglePerGearSection - kOuterRimEndAngle), kOuterRadius);
		}
		self.gearVertexCount = vertices.length / 2 - self.gearOffset;
		self.arrowOffset = vertices.length / 2;
		function addArrowVertex(x, y) {
		  vertices.push(buttonBorder + x, gl.drawingBufferHeight - buttonBorder - y);
		}
		var angledLineWidth = lineWidth / Math.sin(45 * DEG2RAD);
		addArrowVertex(0, buttonScale);
		addArrowVertex(buttonScale, 0);
		addArrowVertex(buttonScale + angledLineWidth, angledLineWidth);
		addArrowVertex(angledLineWidth, buttonScale + angledLineWidth);
		addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);
		addArrowVertex(0, buttonScale);
		addArrowVertex(buttonScale, buttonScale * 2);
		addArrowVertex(buttonScale + angledLineWidth, buttonScale * 2 - angledLineWidth);
		addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);
		addArrowVertex(0, buttonScale);
		addArrowVertex(angledLineWidth, buttonScale - lineWidth);
		addArrowVertex(kButtonWidthDp * dps, buttonScale - lineWidth);
		addArrowVertex(angledLineWidth, buttonScale + lineWidth);
		addArrowVertex(kButtonWidthDp * dps, buttonScale + lineWidth);
		self.arrowVertexCount = vertices.length / 2 - self.arrowOffset;
		gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);
		gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
	  });
	};
	CardboardUI.prototype.render = function () {
	  var gl = this.gl;
	  var self = this;
	  var glState = [gl.CULL_FACE, gl.DEPTH_TEST, gl.BLEND, gl.SCISSOR_TEST, gl.STENCIL_TEST, gl.COLOR_WRITEMASK, gl.VIEWPORT, gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING];
	  glPreserveState(gl, glState, function (gl) {
		gl.disable(gl.CULL_FACE);
		gl.disable(gl.DEPTH_TEST);
		gl.disable(gl.BLEND);
		gl.disable(gl.SCISSOR_TEST);
		gl.disable(gl.STENCIL_TEST);
		gl.colorMask(true, true, true, true);
		gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
		self.renderNoState();
	  });
	};
	CardboardUI.prototype.renderNoState = function () {
	  var gl = this.gl;
	  gl.useProgram(this.program);
	  gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
	  gl.enableVertexAttribArray(this.attribs.position);
	  gl.vertexAttribPointer(this.attribs.position, 2, gl.FLOAT, false, 8, 0);
	  gl.uniform4f(this.uniforms.color, 1.0, 1.0, 1.0, 1.0);
	  orthoMatrix(this.projMat, 0, gl.drawingBufferWidth, 0, gl.drawingBufferHeight, 0.1, 1024.0);
	  gl.uniformMatrix4fv(this.uniforms.projectionMat, false, this.projMat);
	  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
	  gl.drawArrays(gl.TRIANGLE_STRIP, this.gearOffset, this.gearVertexCount);
	  gl.drawArrays(gl.TRIANGLE_STRIP, this.arrowOffset, this.arrowVertexCount);
	};
	function Distortion(coefficients) {
	  this.coefficients = coefficients;
	}
	Distortion.prototype.distortInverse = function (radius) {
	  var r0 = 0;
	  var r1 = 1;
	  var dr0 = radius - this.distort(r0);
	  while (Math.abs(r1 - r0) > 0.0001             ) {
		var dr1 = radius - this.distort(r1);
		var r2 = r1 - dr1 * ((r1 - r0) / (dr1 - dr0));
		r0 = r1;
		r1 = r2;
		dr0 = dr1;
	  }
	  return r1;
	};
	Distortion.prototype.distort = function (radius) {
	  var r2 = radius * radius;
	  var ret = 0;
	  for (var i = 0; i < this.coefficients.length; i++) {
		ret = r2 * (ret + this.coefficients[i]);
	  }
	  return (ret + 1) * radius;
	};
	var degToRad = Math.PI / 180;
	var radToDeg = 180 / Math.PI;
	var Vector3 = function Vector3(x, y, z) {
	  this.x = x || 0;
	  this.y = y || 0;
	  this.z = z || 0;
	};
	Vector3.prototype = {
	  constructor: Vector3,
	  set: function set(x, y, z) {
		this.x = x;
		this.y = y;
		this.z = z;
		return this;
	  },
	  copy: function copy(v) {
		this.x = v.x;
		this.y = v.y;
		this.z = v.z;
		return this;
	  },
	  length: function length() {
		return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
	  },
	  normalize: function normalize() {
		var scalar = this.length();
		if (scalar !== 0) {
		  var invScalar = 1 / scalar;
		  this.multiplyScalar(invScalar);
		} else {
		  this.x = 0;
		  this.y = 0;
		  this.z = 0;
		}
		return this;
	  },
	  multiplyScalar: function multiplyScalar(scalar) {
		this.x *= scalar;
		this.y *= scalar;
		this.z *= scalar;
	  },
	  applyQuaternion: function applyQuaternion(q) {
		var x = this.x;
		var y = this.y;
		var z = this.z;
		var qx = q.x;
		var qy = q.y;
		var qz = q.z;
		var qw = q.w;
		var ix = qw * x + qy * z - qz * y;
		var iy = qw * y + qz * x - qx * z;
		var iz = qw * z + qx * y - qy * x;
		var iw = -qx * x - qy * y - qz * z;
		this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
		this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
		this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
		return this;
	  },
	  dot: function dot(v) {
		return this.x * v.x + this.y * v.y + this.z * v.z;
	  },
	  crossVectors: function crossVectors(a, b) {
		var ax = a.x,
			ay = a.y,
			az = a.z;
		var bx = b.x,
			by = b.y,
			bz = b.z;
		this.x = ay * bz - az * by;
		this.y = az * bx - ax * bz;
		this.z = ax * by - ay * bx;
		return this;
	  }
	};
	var Quaternion = function Quaternion(x, y, z, w) {
	  this.x = x || 0;
	  this.y = y || 0;
	  this.z = z || 0;
	  this.w = w !== undefined ? w : 1;
	};
	Quaternion.prototype = {
	  constructor: Quaternion,
	  set: function set(x, y, z, w) {
		this.x = x;
		this.y = y;
		this.z = z;
		this.w = w;
		return this;
	  },
	  copy: function copy(quaternion) {
		this.x = quaternion.x;
		this.y = quaternion.y;
		this.z = quaternion.z;
		this.w = quaternion.w;
		return this;
	  },
	  setFromEulerXYZ: function setFromEulerXYZ(x, y, z) {
		var c1 = Math.cos(x / 2);
		var c2 = Math.cos(y / 2);
		var c3 = Math.cos(z / 2);
		var s1 = Math.sin(x / 2);
		var s2 = Math.sin(y / 2);
		var s3 = Math.sin(z / 2);
		this.x = s1 * c2 * c3 + c1 * s2 * s3;
		this.y = c1 * s2 * c3 - s1 * c2 * s3;
		this.z = c1 * c2 * s3 + s1 * s2 * c3;
		this.w = c1 * c2 * c3 - s1 * s2 * s3;
		return this;
	  },
	  setFromEulerYXZ: function setFromEulerYXZ(x, y, z) {
		var c1 = Math.cos(x / 2);
		var c2 = Math.cos(y / 2);
		var c3 = Math.cos(z / 2);
		var s1 = Math.sin(x / 2);
		var s2 = Math.sin(y / 2);
		var s3 = Math.sin(z / 2);
		this.x = s1 * c2 * c3 + c1 * s2 * s3;
		this.y = c1 * s2 * c3 - s1 * c2 * s3;
		this.z = c1 * c2 * s3 - s1 * s2 * c3;
		this.w = c1 * c2 * c3 + s1 * s2 * s3;
		return this;
	  },
	  setFromAxisAngle: function setFromAxisAngle(axis, angle) {
		var halfAngle = angle / 2,
			s = Math.sin(halfAngle);
		this.x = axis.x * s;
		this.y = axis.y * s;
		this.z = axis.z * s;
		this.w = Math.cos(halfAngle);
		return this;
	  },
	  multiply: function multiply(q) {
		return this.multiplyQuaternions(this, q);
	  },
	  multiplyQuaternions: function multiplyQuaternions(a, b) {
		var qax = a.x,
			qay = a.y,
			qaz = a.z,
			qaw = a.w;
		var qbx = b.x,
			qby = b.y,
			qbz = b.z,
			qbw = b.w;
		this.x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
		this.y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
		this.z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
		this.w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;
		return this;
	  },
	  inverse: function inverse() {
		this.x *= -1;
		this.y *= -1;
		this.z *= -1;
		this.normalize();
		return this;
	  },
	  normalize: function normalize() {
		var l = Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
		if (l === 0) {
		  this.x = 0;
		  this.y = 0;
		  this.z = 0;
		  this.w = 1;
		} else {
		  l = 1 / l;
		  this.x = this.x * l;
		  this.y = this.y * l;
		  this.z = this.z * l;
		  this.w = this.w * l;
		}
		return this;
	  },
	  slerp: function slerp(qb, t) {
		if (t === 0) return this;
		if (t === 1) return this.copy(qb);
		var x = this.x,
			y = this.y,
			z = this.z,
			w = this.w;
		var cosHalfTheta = w * qb.w + x * qb.x + y * qb.y + z * qb.z;
		if (cosHalfTheta < 0) {
		  this.w = -qb.w;
		  this.x = -qb.x;
		  this.y = -qb.y;
		  this.z = -qb.z;
		  cosHalfTheta = -cosHalfTheta;
		} else {
		  this.copy(qb);
		}
		if (cosHalfTheta >= 1.0) {
		  this.w = w;
		  this.x = x;
		  this.y = y;
		  this.z = z;
		  return this;
		}
		var halfTheta = Math.acos(cosHalfTheta);
		var sinHalfTheta = Math.sqrt(1.0 - cosHalfTheta * cosHalfTheta);
		if (Math.abs(sinHalfTheta) < 0.001) {
		  this.w = 0.5 * (w + this.w);
		  this.x = 0.5 * (x + this.x);
		  this.y = 0.5 * (y + this.y);
		  this.z = 0.5 * (z + this.z);
		  return this;
		}
		var ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,
			ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
		this.w = w * ratioA + this.w * ratioB;
		this.x = x * ratioA + this.x * ratioB;
		this.y = y * ratioA + this.y * ratioB;
		this.z = z * ratioA + this.z * ratioB;
		return this;
	  },
	  setFromUnitVectors: function () {
		var v1, r;
		var EPS = 0.000001;
		return function (vFrom, vTo) {
		  if (v1 === undefined) v1 = new Vector3();
		  r = vFrom.dot(vTo) + 1;
		  if (r < EPS) {
			r = 0;
			if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
			  v1.set(-vFrom.y, vFrom.x, 0);
			} else {
			  v1.set(0, -vFrom.z, vFrom.y);
			}
		  } else {
			v1.crossVectors(vFrom, vTo);
		  }
		  this.x = v1.x;
		  this.y = v1.y;
		  this.z = v1.z;
		  this.w = r;
		  this.normalize();
		  return this;
		};
	  }()
	};
	function Device(params) {
	  this.width = params.width || getScreenWidth();
	  this.height = params.height || getScreenHeight();
	  this.widthMeters = params.widthMeters;
	  this.heightMeters = params.heightMeters;
	  this.bevelMeters = params.bevelMeters;
	}
	var DEFAULT_ANDROID = new Device({
	  widthMeters: 0.110,
	  heightMeters: 0.062,
	  bevelMeters: 0.004
	});
	var DEFAULT_IOS = new Device({
	  widthMeters: 0.1038,
	  heightMeters: 0.0584,
	  bevelMeters: 0.004
	});
	var Viewers = {
	  CardboardV1: new CardboardViewer({
		id: 'CardboardV1',
		label: 'Cardboard I/O 2014',
		fov: 40,
		interLensDistance: 0.060,
		baselineLensDistance: 0.035,
		screenLensDistance: 0.042,
		distortionCoefficients: [0.441, 0.156],
		inverseCoefficients: [-0.4410035, 0.42756155, -0.4804439, 0.5460139, -0.58821183, 0.5733938, -0.48303202, 0.33299083, -0.17573841, 0.0651772, -0.01488963, 0.001559834]
	  }),
	  CardboardV2: new CardboardViewer({
		id: 'CardboardV2',
		label: 'Cardboard I/O 2015',
		fov: 60,
		interLensDistance: 0.064,
		baselineLensDistance: 0.035,
		screenLensDistance: 0.039,
		distortionCoefficients: [0.34, 0.55],
		inverseCoefficients: [-0.33836704, -0.18162185, 0.862655, -1.2462051, 1.0560602, -0.58208317, 0.21609078, -0.05444823, 0.009177956, -9.904169E-4, 6.183535E-5, -1.6981803E-6]
	  })
	};
	function DeviceInfo(deviceParams, additionalViewers) {
	  this.viewer = Viewers.CardboardV2;
	  this.updateDeviceParams(deviceParams);
	  this.distortion = new Distortion(this.viewer.distortionCoefficients);
	  for (var i = 0; i < additionalViewers.length; i++) {
		var viewer = additionalViewers[i];
		Viewers[viewer.id] = new CardboardViewer(viewer);
	  }
	}
	DeviceInfo.prototype.updateDeviceParams = function (deviceParams) {
	  this.device = this.determineDevice_(deviceParams) || this.device;
	};
	DeviceInfo.prototype.getDevice = function () {
	  return this.device;
	};
	DeviceInfo.prototype.setViewer = function (viewer) {
	  this.viewer = viewer;
	  this.distortion = new Distortion(this.viewer.distortionCoefficients);
	};
	DeviceInfo.prototype.determineDevice_ = function (deviceParams) {
	  if (!deviceParams) {
		if (isIOS()) {
		  console.warn('Using fallback iOS device measurements.');
		  return DEFAULT_IOS;
		} else {
		  console.warn('Using fallback Android device measurements.');
		  return DEFAULT_ANDROID;
		}
	  }
	  var METERS_PER_INCH = 0.0254;
	  var metersPerPixelX = METERS_PER_INCH / deviceParams.xdpi;
	  var metersPerPixelY = METERS_PER_INCH / deviceParams.ydpi;
	  var width = getScreenWidth();
	  var height = getScreenHeight();
	  return new Device({
		widthMeters: metersPerPixelX * width,
		heightMeters: metersPerPixelY * height,
		bevelMeters: deviceParams.bevelMm * 0.001
	  });
	};
	DeviceInfo.prototype.getDistortedFieldOfViewLeftEye = function () {
	  var viewer = this.viewer;
	  var device = this.device;
	  var distortion = this.distortion;
	  var eyeToScreenDistance = viewer.screenLensDistance;
	  var outerDist = (device.widthMeters - viewer.interLensDistance) / 2;
	  var innerDist = viewer.interLensDistance / 2;
	  var bottomDist = viewer.baselineLensDistance - device.bevelMeters;
	  var topDist = device.heightMeters - bottomDist;
	  var outerAngle = radToDeg * Math.atan(distortion.distort(outerDist / eyeToScreenDistance));
	  var innerAngle = radToDeg * Math.atan(distortion.distort(innerDist / eyeToScreenDistance));
	  var bottomAngle = radToDeg * Math.atan(distortion.distort(bottomDist / eyeToScreenDistance));
	  var topAngle = radToDeg * Math.atan(distortion.distort(topDist / eyeToScreenDistance));
	  return {
		leftDegrees: Math.min(outerAngle, viewer.fov),
		rightDegrees: Math.min(innerAngle, viewer.fov),
		downDegrees: Math.min(bottomAngle, viewer.fov),
		upDegrees: Math.min(topAngle, viewer.fov)
	  };
	};
	DeviceInfo.prototype.getLeftEyeVisibleTanAngles = function () {
	  var viewer = this.viewer;
	  var device = this.device;
	  var distortion = this.distortion;
	  var fovLeft = Math.tan(-degToRad * viewer.fov);
	  var fovTop = Math.tan(degToRad * viewer.fov);
	  var fovRight = Math.tan(degToRad * viewer.fov);
	  var fovBottom = Math.tan(-degToRad * viewer.fov);
	  var halfWidth = device.widthMeters / 4;
	  var halfHeight = device.heightMeters / 2;
	  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;
	  var centerX = viewer.interLensDistance / 2 - halfWidth;
	  var centerY = -verticalLensOffset;
	  var centerZ = viewer.screenLensDistance;
	  var screenLeft = distortion.distort((centerX - halfWidth) / centerZ);
	  var screenTop = distortion.distort((centerY + halfHeight) / centerZ);
	  var screenRight = distortion.distort((centerX + halfWidth) / centerZ);
	  var screenBottom = distortion.distort((centerY - halfHeight) / centerZ);
	  var result = new Float32Array(4);
	  result[0] = Math.max(fovLeft, screenLeft);
	  result[1] = Math.min(fovTop, screenTop);
	  result[2] = Math.min(fovRight, screenRight);
	  result[3] = Math.max(fovBottom, screenBottom);
	  return result;
	};
	DeviceInfo.prototype.getLeftEyeNoLensTanAngles = function () {
	  var viewer = this.viewer;
	  var device = this.device;
	  var distortion = this.distortion;
	  var result = new Float32Array(4);
	  var fovLeft = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));
	  var fovTop = distortion.distortInverse(Math.tan(degToRad * viewer.fov));
	  var fovRight = distortion.distortInverse(Math.tan(degToRad * viewer.fov));
	  var fovBottom = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));
	  var halfWidth = device.widthMeters / 4;
	  var halfHeight = device.heightMeters / 2;
	  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;
	  var centerX = viewer.interLensDistance / 2 - halfWidth;
	  var centerY = -verticalLensOffset;
	  var centerZ = viewer.screenLensDistance;
	  var screenLeft = (centerX - halfWidth) / centerZ;
	  var screenTop = (centerY + halfHeight) / centerZ;
	  var screenRight = (centerX + halfWidth) / centerZ;
	  var screenBottom = (centerY - halfHeight) / centerZ;
	  result[0] = Math.max(fovLeft, screenLeft);
	  result[1] = Math.min(fovTop, screenTop);
	  result[2] = Math.min(fovRight, screenRight);
	  result[3] = Math.max(fovBottom, screenBottom);
	  return result;
	};
	DeviceInfo.prototype.getLeftEyeVisibleScreenRect = function (undistortedFrustum) {
	  var viewer = this.viewer;
	  var device = this.device;
	  var dist = viewer.screenLensDistance;
	  var eyeX = (device.widthMeters - viewer.interLensDistance) / 2;
	  var eyeY = viewer.baselineLensDistance - device.bevelMeters;
	  var left = (undistortedFrustum[0] * dist + eyeX) / device.widthMeters;
	  var top = (undistortedFrustum[1] * dist + eyeY) / device.heightMeters;
	  var right = (undistortedFrustum[2] * dist + eyeX) / device.widthMeters;
	  var bottom = (undistortedFrustum[3] * dist + eyeY) / device.heightMeters;
	  return {
		x: left,
		y: bottom,
		width: right - left,
		height: top - bottom
	  };
	};
	DeviceInfo.prototype.getFieldOfViewLeftEye = function (opt_isUndistorted) {
	  return opt_isUndistorted ? this.getUndistortedFieldOfViewLeftEye() : this.getDistortedFieldOfViewLeftEye();
	};
	DeviceInfo.prototype.getFieldOfViewRightEye = function (opt_isUndistorted) {
	  var fov = this.getFieldOfViewLeftEye(opt_isUndistorted);
	  return {
		leftDegrees: fov.rightDegrees,
		rightDegrees: fov.leftDegrees,
		upDegrees: fov.upDegrees,
		downDegrees: fov.downDegrees
	  };
	};
	DeviceInfo.prototype.getUndistortedFieldOfViewLeftEye = function () {
	  var p = this.getUndistortedParams_();
	  return {
		leftDegrees: radToDeg * Math.atan(p.outerDist),
		rightDegrees: radToDeg * Math.atan(p.innerDist),
		downDegrees: radToDeg * Math.atan(p.bottomDist),
		upDegrees: radToDeg * Math.atan(p.topDist)
	  };
	};
	DeviceInfo.prototype.getUndistortedViewportLeftEye = function () {
	  var p = this.getUndistortedParams_();
	  var viewer = this.viewer;
	  var device = this.device;
	  var eyeToScreenDistance = viewer.screenLensDistance;
	  var screenWidth = device.widthMeters / eyeToScreenDistance;
	  var screenHeight = device.heightMeters / eyeToScreenDistance;
	  var xPxPerTanAngle = device.width / screenWidth;
	  var yPxPerTanAngle = device.height / screenHeight;
	  var x = Math.round((p.eyePosX - p.outerDist) * xPxPerTanAngle);
	  var y = Math.round((p.eyePosY - p.bottomDist) * yPxPerTanAngle);
	  return {
		x: x,
		y: y,
		width: Math.round((p.eyePosX + p.innerDist) * xPxPerTanAngle) - x,
		height: Math.round((p.eyePosY + p.topDist) * yPxPerTanAngle) - y
	  };
	};
	DeviceInfo.prototype.getUndistortedParams_ = function () {
	  var viewer = this.viewer;
	  var device = this.device;
	  var distortion = this.distortion;
	  var eyeToScreenDistance = viewer.screenLensDistance;
	  var halfLensDistance = viewer.interLensDistance / 2 / eyeToScreenDistance;
	  var screenWidth = device.widthMeters / eyeToScreenDistance;
	  var screenHeight = device.heightMeters / eyeToScreenDistance;
	  var eyePosX = screenWidth / 2 - halfLensDistance;
	  var eyePosY = (viewer.baselineLensDistance - device.bevelMeters) / eyeToScreenDistance;
	  var maxFov = viewer.fov;
	  var viewerMax = distortion.distortInverse(Math.tan(degToRad * maxFov));
	  var outerDist = Math.min(eyePosX, viewerMax);
	  var innerDist = Math.min(halfLensDistance, viewerMax);
	  var bottomDist = Math.min(eyePosY, viewerMax);
	  var topDist = Math.min(screenHeight - eyePosY, viewerMax);
	  return {
		outerDist: outerDist,
		innerDist: innerDist,
		topDist: topDist,
		bottomDist: bottomDist,
		eyePosX: eyePosX,
		eyePosY: eyePosY
	  };
	};
	function CardboardViewer(params) {
	  this.id = params.id;
	  this.label = params.label;
	  this.fov = params.fov;
	  this.interLensDistance = params.interLensDistance;
	  this.baselineLensDistance = params.baselineLensDistance;
	  this.screenLensDistance = params.screenLensDistance;
	  this.distortionCoefficients = params.distortionCoefficients;
	  this.inverseCoefficients = params.inverseCoefficients;
	}
	DeviceInfo.Viewers = Viewers;
	var format = 1;
	var last_updated = "2018-02-20T22:55:10Z";
	var devices = [{"type":"android","rules":[{"mdmh":"asus/*/Nexus 7/*"},{"ua":"Nexus 7"}],"dpi":[320.8,323],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"asus/*/ASUS_Z00AD/*"},{"ua":"ASUS_Z00AD"}],"dpi":[403,404.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Google/*/Pixel XL/*"},{"ua":"Pixel XL"}],"dpi":[537.9,533],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Google/*/Pixel/*"},{"ua":"Pixel"}],"dpi":[432.6,436.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"HTC/*/HTC6435LVW/*"},{"ua":"HTC6435LVW"}],"dpi":[449.7,443.3],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"HTC/*/HTC One XL/*"},{"ua":"HTC One XL"}],"dpi":[315.3,314.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"htc/*/Nexus 9/*"},{"ua":"Nexus 9"}],"dpi":289,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"HTC/*/HTC One M9/*"},{"ua":"HTC One M9"}],"dpi":[442.5,443.3],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"HTC/*/HTC One_M8/*"},{"ua":"HTC One_M8"}],"dpi":[449.7,447.4],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"HTC/*/HTC One/*"},{"ua":"HTC One"}],"dpi":472.8,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Huawei/*/Nexus 6P/*"},{"ua":"Nexus 6P"}],"dpi":[515.1,518],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LENOVO/*/Lenovo PB2-690Y/*"},{"ua":"Lenovo PB2-690Y"}],"dpi":[457.2,454.713],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"LGE/*/Nexus 5X/*"},{"ua":"Nexus 5X"}],"dpi":[422,419.9],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/LGMS345/*"},{"ua":"LGMS345"}],"dpi":[221.7,219.1],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"LGE/*/LG-D800/*"},{"ua":"LG-D800"}],"dpi":[422,424.1],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"LGE/*/LG-D850/*"},{"ua":"LG-D850"}],"dpi":[537.9,541.9],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"LGE/*/VS985 4G/*"},{"ua":"VS985 4G"}],"dpi":[537.9,535.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/Nexus 5/*"},{"ua":"Nexus 5 B"}],"dpi":[442.4,444.8],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/Nexus 4/*"},{"ua":"Nexus 4"}],"dpi":[319.8,318.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/LG-P769/*"},{"ua":"LG-P769"}],"dpi":[240.6,247.5],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/LGMS323/*"},{"ua":"LGMS323"}],"dpi":[206.6,204.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"LGE/*/LGLS996/*"},{"ua":"LGLS996"}],"dpi":[403.4,401.5],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Micromax/*/4560MMX/*"},{"ua":"4560MMX"}],"dpi":[240,219.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Micromax/*/A250/*"},{"ua":"Micromax A250"}],"dpi":[480,446.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Micromax/*/Micromax AQ4501/*"},{"ua":"Micromax AQ4501"}],"dpi":240,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/G5/*"},{"ua":"Moto G (5) Plus"}],"dpi":[403.4,403],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/DROID RAZR/*"},{"ua":"DROID RAZR"}],"dpi":[368.1,256.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT830C/*"},{"ua":"XT830C"}],"dpi":[254,255.9],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT1021/*"},{"ua":"XT1021"}],"dpi":[254,256.7],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/XT1023/*"},{"ua":"XT1023"}],"dpi":[254,256.7],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/XT1028/*"},{"ua":"XT1028"}],"dpi":[326.6,327.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT1034/*"},{"ua":"XT1034"}],"dpi":[326.6,328.4],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/XT1053/*"},{"ua":"XT1053"}],"dpi":[315.3,316.1],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT1562/*"},{"ua":"XT1562"}],"dpi":[403.4,402.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/Nexus 6/*"},{"ua":"Nexus 6 B"}],"dpi":[494.3,489.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT1063/*"},{"ua":"XT1063"}],"dpi":[295,296.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/XT1064/*"},{"ua":"XT1064"}],"dpi":[295,295.6],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/XT1092/*"},{"ua":"XT1092"}],"dpi":[422,424.1],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"motorola/*/XT1095/*"},{"ua":"XT1095"}],"dpi":[422,423.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"motorola/*/G4/*"},{"ua":"Moto G (4)"}],"dpi":401,"bw":4,"ac":1000},{"type":"android","rules":[{"mdmh":"OnePlus/*/A0001/*"},{"ua":"A0001"}],"dpi":[403.4,401],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"OnePlus/*/ONE E1005/*"},{"ua":"ONE E1005"}],"dpi":[442.4,441.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"OnePlus/*/ONE A2005/*"},{"ua":"ONE A2005"}],"dpi":[391.9,405.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"OnePlus/*/ONEPLUS A5000/*"},{"ua":"ONEPLUS A5000 "}],"dpi":[403.411,399.737],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"OnePlus/*/ONE A5010/*"},{"ua":"ONEPLUS A5010"}],"dpi":[403,400],"bw":2,"ac":1000},{"type":"android","rules":[{"mdmh":"OPPO/*/X909/*"},{"ua":"X909"}],"dpi":[442.4,444.1],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9082/*"},{"ua":"GT-I9082"}],"dpi":[184.7,185.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G360P/*"},{"ua":"SM-G360P"}],"dpi":[196.7,205.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/Nexus S/*"},{"ua":"Nexus S"}],"dpi":[234.5,229.8],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9300/*"},{"ua":"GT-I9300"}],"dpi":[304.8,303.9],"bw":5,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-T230NU/*"},{"ua":"SM-T230NU"}],"dpi":216,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SGH-T399/*"},{"ua":"SGH-T399"}],"dpi":[217.7,231.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SGH-M919/*"},{"ua":"SGH-M919"}],"dpi":[440.8,437.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N9005/*"},{"ua":"SM-N9005"}],"dpi":[386.4,387],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SAMSUNG-SM-N900A/*"},{"ua":"SAMSUNG-SM-N900A"}],"dpi":[386.4,387.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9500/*"},{"ua":"GT-I9500"}],"dpi":[442.5,443.3],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9505/*"},{"ua":"GT-I9505"}],"dpi":439.4,"bw":4,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G900F/*"},{"ua":"SM-G900F"}],"dpi":[415.6,431.6],"bw":5,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G900M/*"},{"ua":"SM-G900M"}],"dpi":[415.6,431.6],"bw":5,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G800F/*"},{"ua":"SM-G800F"}],"dpi":326.8,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G906S/*"},{"ua":"SM-G906S"}],"dpi":[562.7,572.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9300/*"},{"ua":"GT-I9300"}],"dpi":[306.7,304.8],"bw":5,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-T535/*"},{"ua":"SM-T535"}],"dpi":[142.6,136.4],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N920C/*"},{"ua":"SM-N920C"}],"dpi":[515.1,518.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N920P/*"},{"ua":"SM-N920P"}],"dpi":[386.3655,390.144],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N920W8/*"},{"ua":"SM-N920W8"}],"dpi":[515.1,518.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9300I/*"},{"ua":"GT-I9300I"}],"dpi":[304.8,305.8],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-I9195/*"},{"ua":"GT-I9195"}],"dpi":[249.4,256.7],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SPH-L520/*"},{"ua":"SPH-L520"}],"dpi":[249.4,255.9],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SAMSUNG-SGH-I717/*"},{"ua":"SAMSUNG-SGH-I717"}],"dpi":285.8,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SPH-D710/*"},{"ua":"SPH-D710"}],"dpi":[217.7,204.2],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/GT-N7100/*"},{"ua":"GT-N7100"}],"dpi":265.1,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SCH-I605/*"},{"ua":"SCH-I605"}],"dpi":265.1,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/Galaxy Nexus/*"},{"ua":"Galaxy Nexus"}],"dpi":[315.3,314.2],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N910H/*"},{"ua":"SM-N910H"}],"dpi":[515.1,518],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-N910C/*"},{"ua":"SM-N910C"}],"dpi":[515.2,520.2],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G130M/*"},{"ua":"SM-G130M"}],"dpi":[165.9,164.8],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G928I/*"},{"ua":"SM-G928I"}],"dpi":[515.1,518.4],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G920F/*"},{"ua":"SM-G920F"}],"dpi":580.6,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G920P/*"},{"ua":"SM-G920P"}],"dpi":[522.5,577],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G925F/*"},{"ua":"SM-G925F"}],"dpi":580.6,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G925V/*"},{"ua":"SM-G925V"}],"dpi":[522.5,576.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G930F/*"},{"ua":"SM-G930F"}],"dpi":576.6,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G935F/*"},{"ua":"SM-G935F"}],"dpi":533,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G950F/*"},{"ua":"SM-G950F"}],"dpi":[562.707,565.293],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"samsung/*/SM-G955U/*"},{"ua":"SM-G955U"}],"dpi":[522.514,525.762],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"Sony/*/C6903/*"},{"ua":"C6903"}],"dpi":[442.5,443.3],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"Sony/*/D6653/*"},{"ua":"D6653"}],"dpi":[428.6,427.6],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Sony/*/E6653/*"},{"ua":"E6653"}],"dpi":[428.6,425.7],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Sony/*/E6853/*"},{"ua":"E6853"}],"dpi":[403.4,401.9],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Sony/*/SGP321/*"},{"ua":"SGP321"}],"dpi":[224.7,224.1],"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"TCT/*/ALCATEL ONE TOUCH Fierce/*"},{"ua":"ALCATEL ONE TOUCH Fierce"}],"dpi":[240,247.5],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"THL/*/thl 5000/*"},{"ua":"thl 5000"}],"dpi":[480,443.3],"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"Fly/*/IQ4412/*"},{"ua":"IQ4412"}],"dpi":307.9,"bw":3,"ac":1000},{"type":"android","rules":[{"mdmh":"ZTE/*/ZTE Blade L2/*"},{"ua":"ZTE Blade L2"}],"dpi":240,"bw":3,"ac":500},{"type":"android","rules":[{"mdmh":"BENEVE/*/VR518/*"},{"ua":"VR518"}],"dpi":480,"bw":3,"ac":500},{"type":"ios","rules":[{"res":[640,960]}],"dpi":[325.1,328.4],"bw":4,"ac":1000},{"type":"ios","rules":[{"res":[640,1136]}],"dpi":[317.1,320.2],"bw":3,"ac":1000},{"type":"ios","rules":[{"res":[750,1334]}],"dpi":326.4,"bw":4,"ac":1000},{"type":"ios","rules":[{"res":[1242,2208]}],"dpi":[453.6,458.4],"bw":4,"ac":1000},{"type":"ios","rules":[{"res":[1125,2001]}],"dpi":[410.9,415.4],"bw":4,"ac":1000},{"type":"ios","rules":[{"res":[1125,2436]}],"dpi":458,"bw":4,"ac":1000}];
	var DPDB_CACHE = {
		format: format,
		last_updated: last_updated,
		devices: devices
	};
	function Dpdb(url, onDeviceParamsUpdated) {
	  this.dpdb = DPDB_CACHE;
	  this.recalculateDeviceParams_();
	  if (url) {
		this.onDeviceParamsUpdated = onDeviceParamsUpdated;
		var xhr = new XMLHttpRequest();
		var obj = this;
		xhr.open('GET', url, true);
		xhr.addEventListener('load', function () {
		  obj.loading = false;
		  if (xhr.status >= 200 && xhr.status <= 299) {
			obj.dpdb = JSON.parse(xhr.response);
			obj.recalculateDeviceParams_();
		  } else {
			console.error('Error loading online DPDB!');
		  }
		});
		xhr.send();
	  }
	}
	Dpdb.prototype.getDeviceParams = function () {
	  return this.deviceParams;
	};
	Dpdb.prototype.recalculateDeviceParams_ = function () {
	  var newDeviceParams = this.calcDeviceParams_();
	  if (newDeviceParams) {
		this.deviceParams = newDeviceParams;
		if (this.onDeviceParamsUpdated) {
		  this.onDeviceParamsUpdated(this.deviceParams);
		}
	  } else {
		console.error('Failed to recalculate device parameters.');
	  }
	};
	Dpdb.prototype.calcDeviceParams_ = function () {
	  var db = this.dpdb;
	  if (!db) {
		console.error('DPDB not available.');
		return null;
	  }
	  if (db.format != 1) {
		console.error('DPDB has unexpected format version.');
		return null;
	  }
	  if (!db.devices || !db.devices.length) {
		console.error('DPDB does not have a devices section.');
		return null;
	  }
	  var userAgent = navigator.userAgent || navigator.vendor || window.opera;
	  var width = getScreenWidth();
	  var height = getScreenHeight();
	  if (!db.devices) {
		console.error('DPDB has no devices section.');
		return null;
	  }
	  for (var i = 0; i < db.devices.length; i++) {
		var device = db.devices[i];
		if (!device.rules) {
		  console.warn('Device[' + i + '] has no rules section.');
		  continue;
		}
		if (device.type != 'ios' && device.type != 'android') {
		  console.warn('Device[' + i + '] has invalid type.');
		  continue;
		}
		if (isIOS() != (device.type == 'ios')) continue;
		var matched = false;
		for (var j = 0; j < device.rules.length; j++) {
		  var rule = device.rules[j];
		  if (this.matchRule_(rule, userAgent, width, height)) {
			matched = true;
			break;
		  }
		}
		if (!matched) continue;
		var xdpi = device.dpi[0] || device.dpi;
		var ydpi = device.dpi[1] || device.dpi;
		return new DeviceParams({ xdpi: xdpi, ydpi: ydpi, bevelMm: device.bw });
	  }
	  console.warn('No DPDB device match.');
	  return null;
	};
	Dpdb.prototype.matchRule_ = function (rule, ua, screenWidth, screenHeight) {
	  if (!rule.ua && !rule.res) return false;
	  if (rule.ua && ua.indexOf(rule.ua) < 0) return false;
	  if (rule.res) {
		if (!rule.res[0] || !rule.res[1]) return false;
		var resX = rule.res[0];
		var resY = rule.res[1];
		if (Math.min(screenWidth, screenHeight) != Math.min(resX, resY) || Math.max(screenWidth, screenHeight) != Math.max(resX, resY)) {
		  return false;
		}
	  }
	  return true;
	};
	function DeviceParams(params) {
	  this.xdpi = params.xdpi;
	  this.ydpi = params.ydpi;
	  this.bevelMm = params.bevelMm;
	}
	function SensorSample(sample, timestampS) {
	  this.set(sample, timestampS);
	}
	SensorSample.prototype.set = function (sample, timestampS) {
	  this.sample = sample;
	  this.timestampS = timestampS;
	};
	SensorSample.prototype.copy = function (sensorSample) {
	  this.set(sensorSample.sample, sensorSample.timestampS);
	};
	function ComplementaryFilter(kFilter, isDebug) {
	  this.kFilter = kFilter;
	  this.isDebug = isDebug;
	  this.currentAccelMeasurement = new SensorSample();
	  this.currentGyroMeasurement = new SensorSample();
	  this.previousGyroMeasurement = new SensorSample();
	  if (isIOS()) {
		this.filterQ = new Quaternion(-1, 0, 0, 1);
	  } else {
		this.filterQ = new Quaternion(1, 0, 0, 1);
	  }
	  this.previousFilterQ = new Quaternion();
	  this.previousFilterQ.copy(this.filterQ);
	  this.accelQ = new Quaternion();
	  this.isOrientationInitialized = false;
	  this.estimatedGravity = new Vector3();
	  this.measuredGravity = new Vector3();
	  this.gyroIntegralQ = new Quaternion();
	}
	ComplementaryFilter.prototype.addAccelMeasurement = function (vector, timestampS) {
	  this.currentAccelMeasurement.set(vector, timestampS);
	};
	ComplementaryFilter.prototype.addGyroMeasurement = function (vector, timestampS) {
	  this.currentGyroMeasurement.set(vector, timestampS);
	  var deltaT = timestampS - this.previousGyroMeasurement.timestampS;
	  if (isTimestampDeltaValid(deltaT)) {
		this.run_();
	  }
	  this.previousGyroMeasurement.copy(this.currentGyroMeasurement);
	};
	ComplementaryFilter.prototype.run_ = function () {
	  if (!this.isOrientationInitialized) {
		this.accelQ = this.accelToQuaternion_(this.currentAccelMeasurement.sample);
		this.previousFilterQ.copy(this.accelQ);
		this.isOrientationInitialized = true;
		return;
	  }
	  var deltaT = this.currentGyroMeasurement.timestampS - this.previousGyroMeasurement.timestampS;
	  var gyroDeltaQ = this.gyroToQuaternionDelta_(this.currentGyroMeasurement.sample, deltaT);
	  this.gyroIntegralQ.multiply(gyroDeltaQ);
	  this.filterQ.copy(this.previousFilterQ);
	  this.filterQ.multiply(gyroDeltaQ);
	  var invFilterQ = new Quaternion();
	  invFilterQ.copy(this.filterQ);
	  invFilterQ.inverse();
	  this.estimatedGravity.set(0, 0, -1);
	  this.estimatedGravity.applyQuaternion(invFilterQ);
	  this.estimatedGravity.normalize();
	  this.measuredGravity.copy(this.currentAccelMeasurement.sample);
	  this.measuredGravity.normalize();
	  var deltaQ = new Quaternion();
	  deltaQ.setFromUnitVectors(this.estimatedGravity, this.measuredGravity);
	  deltaQ.inverse();
	  if (this.isDebug) {
		console.log('Delta: %d deg, G_est: (%s, %s, %s), G_meas: (%s, %s, %s)', radToDeg * getQuaternionAngle(deltaQ), this.estimatedGravity.x.toFixed(1), this.estimatedGravity.y.toFixed(1), this.estimatedGravity.z.toFixed(1), this.measuredGravity.x.toFixed(1), this.measuredGravity.y.toFixed(1), this.measuredGravity.z.toFixed(1));
	  }
	  var targetQ = new Quaternion();
	  targetQ.copy(this.filterQ);
	  targetQ.multiply(deltaQ);
	  this.filterQ.slerp(targetQ, 1 - this.kFilter);
	  this.previousFilterQ.copy(this.filterQ);
	};
	ComplementaryFilter.prototype.getOrientation = function () {
	  return this.filterQ;
	};
	ComplementaryFilter.prototype.accelToQuaternion_ = function (accel) {
	  var normAccel = new Vector3();
	  normAccel.copy(accel);
	  normAccel.normalize();
	  var quat = new Quaternion();
	  quat.setFromUnitVectors(new Vector3(0, 0, -1), normAccel);
	  quat.inverse();
	  return quat;
	};
	ComplementaryFilter.prototype.gyroToQuaternionDelta_ = function (gyro, dt) {
	  var quat = new Quaternion();
	  var axis = new Vector3();
	  axis.copy(gyro);
	  axis.normalize();
	  quat.setFromAxisAngle(axis, gyro.length() * dt);
	  return quat;
	};
	function PosePredictor(predictionTimeS, isDebug) {
	  this.predictionTimeS = predictionTimeS;
	  this.isDebug = isDebug;
	  this.previousQ = new Quaternion();
	  this.previousTimestampS = null;
	  this.deltaQ = new Quaternion();
	  this.outQ = new Quaternion();
	}
	PosePredictor.prototype.getPrediction = function (currentQ, gyro, timestampS) {
	  if (!this.previousTimestampS) {
		this.previousQ.copy(currentQ);
		this.previousTimestampS = timestampS;
		return currentQ;
	  }
	  var axis = new Vector3();
	  axis.copy(gyro);
	  axis.normalize();
	  var angularSpeed = gyro.length();
	  if (angularSpeed < degToRad * 20) {
		if (this.isDebug) {
		  console.log('Moving slowly, at %s deg/s: no prediction', (radToDeg * angularSpeed).toFixed(1));
		}
		this.outQ.copy(currentQ);
		this.previousQ.copy(currentQ);
		return this.outQ;
	  }
	  var predictAngle = angularSpeed * this.predictionTimeS;
	  this.deltaQ.setFromAxisAngle(axis, predictAngle);
	  this.outQ.copy(this.previousQ);
	  this.outQ.multiply(this.deltaQ);
	  this.previousQ.copy(currentQ);
	  this.previousTimestampS = timestampS;
	  return this.outQ;
	};
	function FusionPoseSensor(kFilter, predictionTime, yawOnly, isDebug) {
	  this.yawOnly = yawOnly;
	  this.accelerometer = new Vector3();
	  this.gyroscope = new Vector3();
	  this.filter = new ComplementaryFilter(kFilter, isDebug);
	  this.posePredictor = new PosePredictor(predictionTime, isDebug);
	  this.isFirefoxAndroid = isFirefoxAndroid();
	  this.isIOS = isIOS();
	  var chromeVersion = getChromeVersion();
	  this.isDeviceMotionInRadians = !this.isIOS && chromeVersion && chromeVersion < 66;
	  this.isWithoutDeviceMotion = isChromeWithoutDeviceMotion();
	  this.filterToWorldQ = new Quaternion();
	  if (isIOS()) {
		this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), Math.PI / 2);
	  } else {
		this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);
	  }
	  this.inverseWorldToScreenQ = new Quaternion();
	  this.worldToScreenQ = new Quaternion();
	  this.originalPoseAdjustQ = new Quaternion();
	  this.originalPoseAdjustQ.setFromAxisAngle(new Vector3(0, 0, 1), -window.orientation * Math.PI / 180);
	  this.setScreenTransform_();
	  if (isLandscapeMode()) {
		this.filterToWorldQ.multiply(this.inverseWorldToScreenQ);
	  }
	  this.resetQ = new Quaternion();
	  this.orientationOut_ = new Float32Array(4);
	  this.start();
	}
	FusionPoseSensor.prototype.getPosition = function () {
	  return null;
	};
	FusionPoseSensor.prototype.getOrientation = function () {
	  var orientation = void 0;
	  if (this.isWithoutDeviceMotion && this._deviceOrientationQ) {
		this.deviceOrientationFixQ = this.deviceOrientationFixQ || function () {
		  var z = new Quaternion().setFromAxisAngle(new Vector3(0, 0, -1), 0);
		  var y = new Quaternion();
		  if (window.orientation === -90) {
			y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / -2);
		  } else {
			y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / 2);
		  }
		  return z.multiply(y);
		}();
		this.deviceOrientationFilterToWorldQ = this.deviceOrientationFilterToWorldQ || function () {
		  var q = new Quaternion();
		  q.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);
		  return q;
		}();
		orientation = this._deviceOrientationQ;
		var out = new Quaternion();
		out.copy(orientation);
		out.multiply(this.deviceOrientationFilterToWorldQ);
		out.multiply(this.resetQ);
		out.multiply(this.worldToScreenQ);
		out.multiplyQuaternions(this.deviceOrientationFixQ, out);
		if (this.yawOnly) {
		  out.x = 0;
		  out.z = 0;
		  out.normalize();
		}
		this.orientationOut_[0] = out.x;
		this.orientationOut_[1] = out.y;
		this.orientationOut_[2] = out.z;
		this.orientationOut_[3] = out.w;
		return this.orientationOut_;
	  } else {
		var filterOrientation = this.filter.getOrientation();
		orientation = this.posePredictor.getPrediction(filterOrientation, this.gyroscope, this.previousTimestampS);
	  }
	  var out = new Quaternion();
	  out.copy(this.filterToWorldQ);
	  out.multiply(this.resetQ);
	  out.multiply(orientation);
	  out.multiply(this.worldToScreenQ);
	  if (this.yawOnly) {
		out.x = 0;
		out.z = 0;
		out.normalize();
	  }
	  this.orientationOut_[0] = out.x;
	  this.orientationOut_[1] = out.y;
	  this.orientationOut_[2] = out.z;
	  this.orientationOut_[3] = out.w;
	  return this.orientationOut_;
	};
	FusionPoseSensor.prototype.resetPose = function () {
	  this.resetQ.copy(this.filter.getOrientation());
	  this.resetQ.x = 0;
	  this.resetQ.y = 0;
	  this.resetQ.z *= -1;
	  this.resetQ.normalize();
	  if (isLandscapeMode()) {
		this.resetQ.multiply(this.inverseWorldToScreenQ);
	  }
	  this.resetQ.multiply(this.originalPoseAdjustQ);
	};
	FusionPoseSensor.prototype.onDeviceOrientation_ = function (e) {
	  this._deviceOrientationQ = this._deviceOrientationQ || new Quaternion();
	  var alpha = e.alpha,
		  beta = e.beta,
		  gamma = e.gamma;
	  alpha = (alpha || 0) * Math.PI / 180;
	  beta = (beta || 0) * Math.PI / 180;
	  gamma = (gamma || 0) * Math.PI / 180;
	  this._deviceOrientationQ.setFromEulerYXZ(beta, alpha, -gamma);
	};
	FusionPoseSensor.prototype.onDeviceMotion_ = function (deviceMotion) {
	  this.updateDeviceMotion_(deviceMotion);
	};
	FusionPoseSensor.prototype.updateDeviceMotion_ = function (deviceMotion) {
	  var accGravity = deviceMotion.accelerationIncludingGravity;
	  var rotRate = deviceMotion.rotationRate;
	  var timestampS = deviceMotion.timeStamp / 1000;
	  var deltaS = timestampS - this.previousTimestampS;
	  if (deltaS < 0) {
		warnOnce('fusion-pose-sensor:invalid:non-monotonic', 'Invalid timestamps detected: non-monotonic timestamp from devicemotion');
		this.previousTimestampS = timestampS;
		return;
	  } else if (deltaS <= MIN_TIMESTEP || deltaS > MAX_TIMESTEP) {
		warnOnce('fusion-pose-sensor:invalid:outside-threshold', 'Invalid timestamps detected: Timestamp from devicemotion outside expected range.');
		this.previousTimestampS = timestampS;
		return;
	  }
	  this.accelerometer.set(-accGravity.x, -accGravity.y, -accGravity.z);
	  if (isR7()) {
		this.gyroscope.set(-rotRate.beta, rotRate.alpha, rotRate.gamma);
	  } else {
		this.gyroscope.set(rotRate.alpha, rotRate.beta, rotRate.gamma);
	  }
	  if (!this.isDeviceMotionInRadians) {
		this.gyroscope.multiplyScalar(Math.PI / 180);
	  }
	  this.filter.addAccelMeasurement(this.accelerometer, timestampS);
	  this.filter.addGyroMeasurement(this.gyroscope, timestampS);
	  this.previousTimestampS = timestampS;
	};
	FusionPoseSensor.prototype.onOrientationChange_ = function (screenOrientation) {
	  this.setScreenTransform_();
	};
	FusionPoseSensor.prototype.onMessage_ = function (event) {
	  var message = event.data;
	  if (!message || !message.type) {
		return;
	  }
	  var type = message.type.toLowerCase();
	  if (type !== 'devicemotion') {
		return;
	  }
	  this.updateDeviceMotion_(message.deviceMotionEvent);
	};
	FusionPoseSensor.prototype.setScreenTransform_ = function () {
	  this.worldToScreenQ.set(0, 0, 0, 1);
	  switch (window.orientation) {
		case 0:
		  break;
		case 90:
		  this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), -Math.PI / 2);
		  break;
		case -90:
		  this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), Math.PI / 2);
		  break;
	  }
	  this.inverseWorldToScreenQ.copy(this.worldToScreenQ);
	  this.inverseWorldToScreenQ.inverse();
	};
	FusionPoseSensor.prototype.start = function () {
	  this.onDeviceMotionCallback_ = this.onDeviceMotion_.bind(this);
	  this.onOrientationChangeCallback_ = this.onOrientationChange_.bind(this);
	  this.onMessageCallback_ = this.onMessage_.bind(this);
	  this.onDeviceOrientationCallback_ = this.onDeviceOrientation_.bind(this);
	  if (isIOS() && isInsideCrossOriginIFrame()) {
		window.addEventListener('message', this.onMessageCallback_);
	  }
	  window.addEventListener('orientationchange', this.onOrientationChangeCallback_);
	  if (this.isWithoutDeviceMotion) {
		window.addEventListener('deviceorientation', this.onDeviceOrientationCallback_);
	  } else {
		window.addEventListener('devicemotion', this.onDeviceMotionCallback_);
	  }
	};
	FusionPoseSensor.prototype.stop = function () {
	  window.removeEventListener('devicemotion', this.onDeviceMotionCallback_);
	  window.removeEventListener('deviceorientation', this.onDeviceOrientationCallback_);
	  window.removeEventListener('orientationchange', this.onOrientationChangeCallback_);
	  window.removeEventListener('message', this.onMessageCallback_);
	};
	var SENSOR_FREQUENCY = 60;
	var X_AXIS = new Vector3(1, 0, 0);
	var Z_AXIS = new Vector3(0, 0, 1);
	var orientation = {};
	if (screen.orientation) {
	  orientation = screen.orientation;
	} else if (screen.msOrientation) {
	  orientation = screen.msOrientation;
	} else {
	  Object.defineProperty(orientation, 'angle', {
		get: function get$$1() {
		  return window.orientation || 0;
		}
	  });
	}
	var SENSOR_TO_VR = new Quaternion();
	SENSOR_TO_VR.setFromAxisAngle(X_AXIS, -Math.PI / 2);
	SENSOR_TO_VR.multiply(new Quaternion().setFromAxisAngle(Z_AXIS, Math.PI / 2));
	var PoseSensor = function () {
	  function PoseSensor(config) {
		classCallCheck(this, PoseSensor);
		this.config = config;
		this.sensor = null;
		this.fusionSensor = null;
		this._out = new Float32Array(4);
		this.api = null;
		this.errors = [];
		this._sensorQ = new Quaternion();
		this._worldToScreenQ = new Quaternion();
		this._outQ = new Quaternion();
		this._onSensorRead = this._onSensorRead.bind(this);
		this._onSensorError = this._onSensorError.bind(this);
		this._onOrientationChange = this._onOrientationChange.bind(this);
		this._onOrientationChange();
		this.init();
	  }
	  createClass(PoseSensor, [{
		key: 'init',
		value: function init() {
		  var sensor = null;
		  try {
			sensor = new RelativeOrientationSensor({ frequency: SENSOR_FREQUENCY });
			sensor.addEventListener('error', this._onSensorError);
		  } catch (error) {
			this.errors.push(error);
			if (error.name === 'SecurityError') {
			  console.error('Cannot construct sensors due to the Feature Policy');
			  console.warn('Attempting to fall back using "devicemotion"; however this will ' + 'fail in the future without correct permissions.');
			  this.useDeviceMotion();
			} else if (error.name === 'ReferenceError') {
			  this.useDeviceMotion();
			} else {
			  console.error(error);
			}
		  }
		  if (sensor) {
			this.api = 'sensor';
			this.sensor = sensor;
			this.sensor.addEventListener('reading', this._onSensorRead);
			this.sensor.start();
		  }
		  window.addEventListener('orientationchange', this._onOrientationChange);
		}
	  }, {
		key: 'useDeviceMotion',
		value: function useDeviceMotion() {
		  this.api = 'devicemotion';
		  this.fusionSensor = new FusionPoseSensor(this.config.K_FILTER, this.config.PREDICTION_TIME_S, this.config.YAW_ONLY, this.config.DEBUG);
		  if (this.sensor) {
			this.sensor.removeEventListener('reading', this._onSensorRead);
			this.sensor.removeEventListener('error', this._onSensorError);
			this.sensor = null;
		  }
		}
	  }, {
		key: 'getOrientation',
		value: function getOrientation() {
		  if (this.fusionSensor) {
			return this.fusionSensor.getOrientation();
		  }
		  if (!this.sensor || !this.sensor.quaternion) {
			this._out[0] = this._out[1] = this._out[2] = 0;
			this._out[3] = 1;
			return this._out;
		  }
		  var q = this.sensor.quaternion;
		  this._sensorQ.set(q[0], q[1], q[2], q[3]);
		  var out = this._outQ;
		  out.copy(SENSOR_TO_VR);
		  out.multiply(this._sensorQ);
		  out.multiply(this._worldToScreenQ);
		  if (this.config.YAW_ONLY) {
			out.x = out.z = 0;
			out.normalize();
		  }
		  this._out[0] = out.x;
		  this._out[1] = out.y;
		  this._out[2] = out.z;
		  this._out[3] = out.w;
		  return this._out;
		}
	  }, {
		key: '_onSensorError',
		value: function _onSensorError(event) {
		  this.errors.push(event.error);
		  if (event.error.name === 'NotAllowedError') {
			console.error('Permission to access sensor was denied');
		  } else if (event.error.name === 'NotReadableError') {
			console.error('Sensor could not be read');
		  } else {
			console.error(event.error);
		  }
		  this.useDeviceMotion();
		}
	  }, {
		key: '_onSensorRead',
		value: function _onSensorRead() {}
	  }, {
		key: '_onOrientationChange',
		value: function _onOrientationChange() {
		  var angle = -orientation.angle * Math.PI / 180;
		  this._worldToScreenQ.setFromAxisAngle(Z_AXIS, angle);
		}
	  }]);
	  return PoseSensor;
	}();
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                    <path d="M6.92,71.133 C6.631,71.133 6.433,70.905 6.433,70.508 C6.433,69.948 6.829,69.265 7.317,68.982 C7.46,68.9 7.595,68.861 7.714,68.861 C8.003,68.861 8.202,69.09 8.202,69.487 C8.202,70.047 7.806,70.73 7.317,71.012 C7.174,71.094 7.039,71.133 6.92,71.133 M7.714,68.674 C7.557,68.674 7.392,68.723 7.224,68.821 C6.676,69.138 6.246,69.879 6.246,70.508 C6.246,70.994 6.517,71.32 6.92,71.32 C7.078,71.32 7.243,71.271 7.411,71.174 C7.959,70.857 8.389,70.117 8.389,69.487 C8.389,69.001 8.117,68.674 7.714,68.674" id="Fill-14" fill="#8097A2"></path>
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                </g>
                <path d="M125.737,88.647 L118.098,91.981 L118.098,84 L106.639,88.713 L106.639,96.982 L99,100.315 L112.369,103.961 L125.737,88.647" id="Imported-Layers-Copy-2" fill="#455A64" sketch:type="MSShapeGroup"></path>
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	function RotateInstructions() {
	  this.loadIcon_();
	  var overlay = document.createElement('div');
	  var s = overlay.style;
	  s.position = 'fixed';
	  s.top = 0;
	  s.right = 0;
	  s.bottom = 0;
	  s.left = 0;
	  s.backgroundColor = 'gray';
	  s.fontFamily = 'sans-serif';
	  s.zIndex = 1000000;
	  var img = document.createElement('img');
	  img.src = this.icon;
	  var s = img.style;
	  s.marginLeft = '25%';
	  s.marginTop = '25%';
	  s.width = '50%';
	  overlay.appendChild(img);
	  var text = document.createElement('div');
	  var s = text.style;
	  s.textAlign = 'center';
	  s.fontSize = '16px';
	  s.lineHeight = '24px';
	  s.margin = '24px 25%';
	  s.width = '50%';
	  text.innerHTML = 'Place your phone into your Cardboard viewer.';
	  overlay.appendChild(text);
	  var snackbar = document.createElement('div');
	  var s = snackbar.style;
	  s.backgroundColor = '#CFD8DC';
	  s.position = 'fixed';
	  s.bottom = 0;
	  s.width = '100%';
	  s.height = '48px';
	  s.padding = '14px 24px';
	  s.boxSizing = 'border-box';
	  s.color = '#656A6B';
	  overlay.appendChild(snackbar);
	  var snackbarText = document.createElement('div');
	  snackbarText.style.float = 'left';
	  snackbarText.innerHTML = 'No Cardboard viewer?';
	  var snackbarButton = document.createElement('a');
	  snackbarButton.href = 'https://www.google.com/get/cardboard/get-cardboard/';
	  snackbarButton.innerHTML = 'get one';
	  snackbarButton.target = '_blank';
	  var s = snackbarButton.style;
	  s.float = 'right';
	  s.fontWeight = 600;
	  s.textTransform = 'uppercase';
	  s.borderLeft = '1px solid gray';
	  s.paddingLeft = '24px';
	  s.textDecoration = 'none';
	  s.color = '#656A6B';
	  snackbar.appendChild(snackbarText);
	  snackbar.appendChild(snackbarButton);
	  this.overlay = overlay;
	  this.text = text;
	  this.hide();
	}
	RotateInstructions.prototype.show = function (parent) {
	  if (!parent && !this.overlay.parentElement) {
		document.body.appendChild(this.overlay);
	  } else if (parent) {
		if (this.overlay.parentElement && this.overlay.parentElement != parent) this.overlay.parentElement.removeChild(this.overlay);
		parent.appendChild(this.overlay);
	  }
	  this.overlay.style.display = 'block';
	  var img = this.overlay.querySelector('img');
	  var s = img.style;
	  if (isLandscapeMode()) {
		s.width = '20%';
		s.marginLeft = '40%';
		s.marginTop = '3%';
	  } else {
		s.width = '50%';
		s.marginLeft = '25%';
		s.marginTop = '25%';
	  }
	};
	RotateInstructions.prototype.hide = function () {
	  this.overlay.style.display = 'none';
	};
	RotateInstructions.prototype.showTemporarily = function (ms, parent) {
	  this.show(parent);
	  this.timer = setTimeout(this.hide.bind(this), ms);
	};
	RotateInstructions.prototype.disableShowTemporarily = function () {
	  clearTimeout(this.timer);
	};
	RotateInstructions.prototype.update = function () {
	  this.disableShowTemporarily();
	  if (!isLandscapeMode() && isMobile()) {
		this.show();
	  } else {
		this.hide();
	  }
	};
	RotateInstructions.prototype.loadIcon_ = function () {
	  this.icon = base64('image/svg+xml', rotateInstructionsAsset);
	};
	var DEFAULT_VIEWER = 'CardboardV1';
	var VIEWER_KEY = 'WEBVR_CARDBOARD_VIEWER';
	var CLASS_NAME = 'webvr-polyfill-viewer-selector';
	function ViewerSelector(defaultViewer) {
	  try {
		this.selectedKey = localStorage.getItem(VIEWER_KEY);
	  } catch (error) {
		console.error('Failed to load viewer profile: %s', error);
	  }
	  if (!this.selectedKey) {
		this.selectedKey = defaultViewer || DEFAULT_VIEWER;
	  }
	  this.dialog = this.createDialog_(DeviceInfo.Viewers);
	  this.root = null;
	  this.onChangeCallbacks_ = [];
	}
	ViewerSelector.prototype.show = function (root) {
	  this.root = root;
	  root.appendChild(this.dialog);
	  var selected = this.dialog.querySelector('#' + this.selectedKey);
	  selected.checked = true;
	  this.dialog.style.display = 'block';
	};
	ViewerSelector.prototype.hide = function () {
	  if (this.root && this.root.contains(this.dialog)) {
		this.root.removeChild(this.dialog);
	  }
	  this.dialog.style.display = 'none';
	};
	ViewerSelector.prototype.getCurrentViewer = function () {
	  return DeviceInfo.Viewers[this.selectedKey];
	};
	ViewerSelector.prototype.getSelectedKey_ = function () {
	  var input = this.dialog.querySelector('input[name=field]:checked');
	  if (input) {
		return input.id;
	  }
	  return null;
	};
	ViewerSelector.prototype.onChange = function (cb) {
	  this.onChangeCallbacks_.push(cb);
	};
	ViewerSelector.prototype.fireOnChange_ = function (viewer) {
	  for (var i = 0; i < this.onChangeCallbacks_.length; i++) {
		this.onChangeCallbacks_[i](viewer);
	  }
	};
	ViewerSelector.prototype.onSave_ = function () {
	  this.selectedKey = this.getSelectedKey_();
	  if (!this.selectedKey || !DeviceInfo.Viewers[this.selectedKey]) {
		console.error('ViewerSelector.onSave_: this should never happen!');
		return;
	  }
	  this.fireOnChange_(DeviceInfo.Viewers[this.selectedKey]);
	  try {
		localStorage.setItem(VIEWER_KEY, this.selectedKey);
	  } catch (error) {
		console.error('Failed to save viewer profile: %s', error);
	  }
	  this.hide();
	};
	ViewerSelector.prototype.createDialog_ = function (options) {
	  var container = document.createElement('div');
	  container.classList.add(CLASS_NAME);
	  container.style.display = 'none';
	  var overlay = document.createElement('div');
	  var s = overlay.style;
	  s.position = 'fixed';
	  s.left = 0;
	  s.top = 0;
	  s.width = '100%';
	  s.height = '100%';
	  s.background = 'rgba(0, 0, 0, 0.3)';
	  overlay.addEventListener('click', this.hide.bind(this));
	  var width = 280;
	  var dialog = document.createElement('div');
	  var s = dialog.style;
	  s.boxSizing = 'border-box';
	  s.position = 'fixed';
	  s.top = '24px';
	  s.left = '50%';
	  s.marginLeft = -width / 2 + 'px';
	  s.width = width + 'px';
	  s.padding = '24px';
	  s.overflow = 'hidden';
	  s.background = '#fafafa';
	  s.fontFamily = "'Roboto', sans-serif";
	  s.boxShadow = '0px 5px 20px #666';
	  dialog.appendChild(this.createH1_('Select your viewer'));
	  for (var id in options) {
		dialog.appendChild(this.createChoice_(id, options[id].label));
	  }
	  dialog.appendChild(this.createButton_('Save', this.onSave_.bind(this)));
	  container.appendChild(overlay);
	  container.appendChild(dialog);
	  return container;
	};
	ViewerSelector.prototype.createH1_ = function (name) {
	  var h1 = document.createElement('h1');
	  var s = h1.style;
	  s.color = 'black';
	  s.fontSize = '20px';
	  s.fontWeight = 'bold';
	  s.marginTop = 0;
	  s.marginBottom = '24px';
	  h1.innerHTML = name;
	  return h1;
	};
	ViewerSelector.prototype.createChoice_ = function (id, name) {
	  var div = document.createElement('div');
	  div.style.marginTop = '8px';
	  div.style.color = 'black';
	  var input = document.createElement('input');
	  input.style.fontSize = '30px';
	  input.setAttribute('id', id);
	  input.setAttribute('type', 'radio');
	  input.setAttribute('value', id);
	  input.setAttribute('name', 'field');
	  var label = document.createElement('label');
	  label.style.marginLeft = '4px';
	  label.setAttribute('for', id);
	  label.innerHTML = name;
	  div.appendChild(input);
	  div.appendChild(label);
	  return div;
	};
	ViewerSelector.prototype.createButton_ = function (label, onclick) {
	  var button = document.createElement('button');
	  button.innerHTML = label;
	  var s = button.style;
	  s.float = 'right';
	  s.textTransform = 'uppercase';
	  s.color = '#1094f7';
	  s.fontSize = '14px';
	  s.letterSpacing = 0;
	  s.border = 0;
	  s.background = 'none';
	  s.marginTop = '16px';
	  button.addEventListener('click', onclick);
	  return button;
	};
	var commonjsGlobal$$1 = typeof window !== 'undefined' ? window : typeof commonjsGlobal$1 !== 'undefined' ? commonjsGlobal$1 : typeof self !== 'undefined' ? self : {};
	function unwrapExports$$1 (x) {
		return x && x.__esModule ? x['default'] : x;
	}
	function createCommonjsModule$$1(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}
	var NoSleep = createCommonjsModule$$1(function (module, exports) {
	(function webpackUniversalModuleDefinition(root, factory) {
		module.exports = factory();
	})(commonjsGlobal$$1, function() {
	return          (function(modules) {
				 var installedModules = {};
				 function __webpack_require__(moduleId) {
					 if(installedModules[moduleId]) {
						 return installedModules[moduleId].exports;
					 }
					 var module = installedModules[moduleId] = {
						 i: moduleId,
						 l: false,
						 exports: {}
					 };
					 modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
					 module.l = true;
					 return module.exports;
				 }
				 __webpack_require__.m = modules;
				 __webpack_require__.c = installedModules;
				 __webpack_require__.d = function(exports, name, getter) {
					 if(!__webpack_require__.o(exports, name)) {
						 Object.defineProperty(exports, name, {
							 configurable: false,
							 enumerable: true,
							 get: getter
						 });
					 }
				 };
				 __webpack_require__.n = function(module) {
					 var getter = module && module.__esModule ?
						 function getDefault() { return module['default']; } :
						 function getModuleExports() { return module; };
					 __webpack_require__.d(getter, 'a', getter);
					 return getter;
				 };
				 __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
				 __webpack_require__.p = "";
				 return __webpack_require__(__webpack_require__.s = 0);
			 })
			 ([
		  (function(module, exports, __webpack_require__) {
	var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
	function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
	var mediaFile = __webpack_require__(1);
	var oldIOS = typeof navigator !== 'undefined' && parseFloat(('' + (/CPU.*OS ([0-9_]{3,4})[0-9_]{0,1}|(CPU like).*AppleWebKit.*Mobile/i.exec(navigator.userAgent) || [0, ''])[1]).replace('undefined', '3_2').replace('_', '.').replace('_', '')) < 10 && !window.MSStream;
	var NoSleep = function () {
	  function NoSleep() {
		_classCallCheck(this, NoSleep);
		if (oldIOS) {
		  this.noSleepTimer = null;
		} else {
		  this.noSleepVideo = document.createElement('video');
		  this.noSleepVideo.setAttribute('playsinline', '');
		  this.noSleepVideo.setAttribute('src', mediaFile);
		  this.noSleepVideo.addEventListener('timeupdate', function (e) {
			if (this.noSleepVideo.currentTime > 0.5) {
			  this.noSleepVideo.currentTime = Math.random();
			}
		  }.bind(this));
		}
	  }
	  _createClass(NoSleep, [{
		key: 'enable',
		value: function enable() {
		  if (oldIOS) {
			this.disable();
			this.noSleepTimer = window.setInterval(function () {
			  window.location.href = '/';
			  window.setTimeout(window.stop, 0);
			}, 15000);
		  } else {
			this.noSleepVideo.play();
		  }
		}
	  }, {
		key: 'disable',
		value: function disable() {
		  if (oldIOS) {
			if (this.noSleepTimer) {
			  window.clearInterval(this.noSleepTimer);
			  this.noSleepTimer = null;
			}
		  } else {
			this.noSleepVideo.pause();
		  }
		}
	  }]);
	  return NoSleep;
	}();
	module.exports = NoSleep;
		  }),
		  (function(module, exports, __webpack_require__) {
	module.exports = 'data:video/mp4;base64,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		  })
			 ]);
	});
	});
	var NoSleep$1 = unwrapExports$$1(NoSleep);
	var nextDisplayId = 1000;
	var defaultLeftBounds = [0, 0, 0.5, 1];
	var defaultRightBounds = [0.5, 0, 0.5, 1];
	var raf = window.requestAnimationFrame;
	var caf = window.cancelAnimationFrame;
	function VRFrameData() {
	  this.leftProjectionMatrix = new Float32Array(16);
	  this.leftViewMatrix = new Float32Array(16);
	  this.rightProjectionMatrix = new Float32Array(16);
	  this.rightViewMatrix = new Float32Array(16);
	  this.pose = null;
	}
	function VRDisplayCapabilities(config) {
	  Object.defineProperties(this, {
		hasPosition: {
		  writable: false, enumerable: true, value: config.hasPosition
		},
		hasExternalDisplay: {
		  writable: false, enumerable: true, value: config.hasExternalDisplay
		},
		canPresent: {
		  writable: false, enumerable: true, value: config.canPresent
		},
		maxLayers: {
		  writable: false, enumerable: true, value: config.maxLayers
		},
		hasOrientation: {
		  enumerable: true, get: function get() {
			deprecateWarning('VRDisplayCapabilities.prototype.hasOrientation', 'VRDisplay.prototype.getFrameData');
			return config.hasOrientation;
		  }
		}
	  });
	}
	function VRDisplay(config) {
	  config = config || {};
	  var USE_WAKELOCK = 'wakelock' in config ? config.wakelock : true;
	  this.isPolyfilled = true;
	  this.displayId = nextDisplayId++;
	  this.displayName = '';
	  this.depthNear = 0.01;
	  this.depthFar = 10000.0;
	  this.isPresenting = false;
	  Object.defineProperty(this, 'isConnected', {
		get: function get() {
		  deprecateWarning('VRDisplay.prototype.isConnected', 'VRDisplayCapabilities.prototype.hasExternalDisplay');
		  return false;
		}
	  });
	  this.capabilities = new VRDisplayCapabilities({
		hasPosition: false,
		hasOrientation: false,
		hasExternalDisplay: false,
		canPresent: false,
		maxLayers: 1
	  });
	  this.stageParameters = null;
	  this.waitingForPresent_ = false;
	  this.layer_ = null;
	  this.originalParent_ = null;
	  this.fullscreenElement_ = null;
	  this.fullscreenWrapper_ = null;
	  this.fullscreenElementCachedStyle_ = null;
	  this.fullscreenEventTarget_ = null;
	  this.fullscreenChangeHandler_ = null;
	  this.fullscreenErrorHandler_ = null;
	  if (USE_WAKELOCK && isMobile()) {
		this.wakelock_ = new NoSleep$1();
	  }
	}
	VRDisplay.prototype.getFrameData = function (frameData) {
	  return frameDataFromPose(frameData, this._getPose(), this);
	};
	VRDisplay.prototype.getPose = function () {
	  deprecateWarning('VRDisplay.prototype.getPose', 'VRDisplay.prototype.getFrameData');
	  return this._getPose();
	};
	VRDisplay.prototype.resetPose = function () {
	  deprecateWarning('VRDisplay.prototype.resetPose');
	  return this._resetPose();
	};
	VRDisplay.prototype.getImmediatePose = function () {
	  deprecateWarning('VRDisplay.prototype.getImmediatePose', 'VRDisplay.prototype.getFrameData');
	  return this._getPose();
	};
	VRDisplay.prototype.requestAnimationFrame = function (callback) {
	  return raf(callback);
	};
	VRDisplay.prototype.cancelAnimationFrame = function (id) {
	  return caf(id);
	};
	VRDisplay.prototype.wrapForFullscreen = function (element) {
	  if (isIOS()) {
		return element;
	  }
	  if (!this.fullscreenWrapper_) {
		this.fullscreenWrapper_ = document.createElement('div');
		var cssProperties = ['height: ' + Math.min(screen.height, screen.width) + 'px !important', 'top: 0 !important', 'left: 0 !important', 'right: 0 !important', 'border: 0', 'margin: 0', 'padding: 0', 'z-index: 999999 !important', 'position: fixed'];
		this.fullscreenWrapper_.setAttribute('style', cssProperties.join('; ') + ';');
		this.fullscreenWrapper_.classList.add('webvr-polyfill-fullscreen-wrapper');
	  }
	  if (this.fullscreenElement_ == element) {
		return this.fullscreenWrapper_;
	  }
	  if (this.fullscreenElement_) {
		if (this.originalParent_) {
		  this.originalParent_.appendChild(this.fullscreenElement_);
		} else {
		  this.fullscreenElement_.parentElement.removeChild(this.fullscreenElement_);
		}
	  }
	  this.fullscreenElement_ = element;
	  this.originalParent_ = element.parentElement;
	  if (!this.originalParent_) {
		document.body.appendChild(element);
	  }
	  if (!this.fullscreenWrapper_.parentElement) {
		var parent = this.fullscreenElement_.parentElement;
		parent.insertBefore(this.fullscreenWrapper_, this.fullscreenElement_);
		parent.removeChild(this.fullscreenElement_);
	  }
	  this.fullscreenWrapper_.insertBefore(this.fullscreenElement_, this.fullscreenWrapper_.firstChild);
	  this.fullscreenElementCachedStyle_ = this.fullscreenElement_.getAttribute('style');
	  var self = this;
	  function applyFullscreenElementStyle() {
		if (!self.fullscreenElement_) {
		  return;
		}
		var cssProperties = ['position: absolute', 'top: 0', 'left: 0', 'width: ' + Math.max(screen.width, screen.height) + 'px', 'height: ' + Math.min(screen.height, screen.width) + 'px', 'border: 0', 'margin: 0', 'padding: 0'];
		self.fullscreenElement_.setAttribute('style', cssProperties.join('; ') + ';');
	  }
	  applyFullscreenElementStyle();
	  return this.fullscreenWrapper_;
	};
	VRDisplay.prototype.removeFullscreenWrapper = function () {
	  if (!this.fullscreenElement_) {
		return;
	  }
	  var element = this.fullscreenElement_;
	  if (this.fullscreenElementCachedStyle_) {
		element.setAttribute('style', this.fullscreenElementCachedStyle_);
	  } else {
		element.removeAttribute('style');
	  }
	  this.fullscreenElement_ = null;
	  this.fullscreenElementCachedStyle_ = null;
	  var parent = this.fullscreenWrapper_.parentElement;
	  this.fullscreenWrapper_.removeChild(element);
	  if (this.originalParent_ === parent) {
		parent.insertBefore(element, this.fullscreenWrapper_);
	  }
	  else if (this.originalParent_) {
		  this.originalParent_.appendChild(element);
		}
	  parent.removeChild(this.fullscreenWrapper_);
	  return element;
	};
	VRDisplay.prototype.requestPresent = function (layers) {
	  var wasPresenting = this.isPresenting;
	  var self = this;
	  if (!(layers instanceof Array)) {
		deprecateWarning('VRDisplay.prototype.requestPresent with non-array argument', 'an array of VRLayers as the first argument');
		layers = [layers];
	  }
	  return new Promise(function (resolve, reject) {
		if (!self.capabilities.canPresent) {
		  reject(new Error('VRDisplay is not capable of presenting.'));
		  return;
		}
		if (layers.length == 0 || layers.length > self.capabilities.maxLayers) {
		  reject(new Error('Invalid number of layers.'));
		  return;
		}
		var incomingLayer = layers[0];
		if (!incomingLayer.source) {
		  resolve();
		  return;
		}
		var leftBounds = incomingLayer.leftBounds || defaultLeftBounds;
		var rightBounds = incomingLayer.rightBounds || defaultRightBounds;
		if (wasPresenting) {
		  var layer = self.layer_;
		  if (layer.source !== incomingLayer.source) {
			layer.source = incomingLayer.source;
		  }
		  for (var i = 0; i < 4; i++) {
			layer.leftBounds[i] = leftBounds[i];
			layer.rightBounds[i] = rightBounds[i];
		  }
		  self.wrapForFullscreen(self.layer_.source);
		  self.updatePresent_();
		  resolve();
		  return;
		}
		self.layer_ = {
		  predistorted: incomingLayer.predistorted,
		  source: incomingLayer.source,
		  leftBounds: leftBounds.slice(0),
		  rightBounds: rightBounds.slice(0)
		};
		self.waitingForPresent_ = false;
		if (self.layer_ && self.layer_.source) {
		  var fullscreenElement = self.wrapForFullscreen(self.layer_.source);
		  var onFullscreenChange = function onFullscreenChange() {
			var actualFullscreenElement = getFullscreenElement();
			self.isPresenting = fullscreenElement === actualFullscreenElement;
			if (self.isPresenting) {
			  if (screen.orientation && screen.orientation.lock) {
				screen.orientation.lock('landscape-primary').catch(function (error) {
				  console.error('screen.orientation.lock() failed due to', error.message);
				});
			  }
			  self.waitingForPresent_ = false;
			  self.beginPresent_();
			  resolve();
			} else {
			  if (screen.orientation && screen.orientation.unlock) {
				screen.orientation.unlock();
			  }
			  self.removeFullscreenWrapper();
			  self.disableWakeLock();
			  self.endPresent_();
			  self.removeFullscreenListeners_();
			}
			self.fireVRDisplayPresentChange_();
		  };
		  var onFullscreenError = function onFullscreenError() {
			if (!self.waitingForPresent_) {
			  return;
			}
			self.removeFullscreenWrapper();
			self.removeFullscreenListeners_();
			self.disableWakeLock();
			self.waitingForPresent_ = false;
			self.isPresenting = false;
			reject(new Error('Unable to present.'));
		  };
		  self.addFullscreenListeners_(fullscreenElement, onFullscreenChange, onFullscreenError);
		  if (requestFullscreen(fullscreenElement)) {
			self.enableWakeLock();
			self.waitingForPresent_ = true;
		  } else if (isIOS() || isWebViewAndroid()) {
			self.enableWakeLock();
			self.isPresenting = true;
			self.beginPresent_();
			self.fireVRDisplayPresentChange_();
			resolve();
		  }
		}
		if (!self.waitingForPresent_ && !isIOS()) {
		  exitFullscreen();
		  reject(new Error('Unable to present.'));
		}
	  });
	};
	VRDisplay.prototype.exitPresent = function () {
	  var wasPresenting = this.isPresenting;
	  var self = this;
	  this.isPresenting = false;
	  this.layer_ = null;
	  this.disableWakeLock();
	  return new Promise(function (resolve, reject) {
		if (wasPresenting) {
		  if (!exitFullscreen() && isIOS()) {
			self.endPresent_();
			self.fireVRDisplayPresentChange_();
		  }
		  if (isWebViewAndroid()) {
			self.removeFullscreenWrapper();
			self.removeFullscreenListeners_();
			self.endPresent_();
			self.fireVRDisplayPresentChange_();
		  }
		  resolve();
		} else {
		  reject(new Error('Was not presenting to VRDisplay.'));
		}
	  });
	};
	VRDisplay.prototype.getLayers = function () {
	  if (this.layer_) {
		return [this.layer_];
	  }
	  return [];
	};
	VRDisplay.prototype.fireVRDisplayPresentChange_ = function () {
	  var event = new CustomEvent('vrdisplaypresentchange', { detail: { display: this } });
	  window.dispatchEvent(event);
	};
	VRDisplay.prototype.fireVRDisplayConnect_ = function () {
	  var event = new CustomEvent('vrdisplayconnect', { detail: { display: this } });
	  window.dispatchEvent(event);
	};
	VRDisplay.prototype.addFullscreenListeners_ = function (element, changeHandler, errorHandler) {
	  this.removeFullscreenListeners_();
	  this.fullscreenEventTarget_ = element;
	  this.fullscreenChangeHandler_ = changeHandler;
	  this.fullscreenErrorHandler_ = errorHandler;
	  if (changeHandler) {
		if (document.fullscreenEnabled) {
		  element.addEventListener('fullscreenchange', changeHandler, false);
		} else if (document.webkitFullscreenEnabled) {
		  element.addEventListener('webkitfullscreenchange', changeHandler, false);
		} else if (document.mozFullScreenEnabled) {
		  document.addEventListener('mozfullscreenchange', changeHandler, false);
		} else if (document.msFullscreenEnabled) {
		  element.addEventListener('msfullscreenchange', changeHandler, false);
		}
	  }
	  if (errorHandler) {
		if (document.fullscreenEnabled) {
		  element.addEventListener('fullscreenerror', errorHandler, false);
		} else if (document.webkitFullscreenEnabled) {
		  element.addEventListener('webkitfullscreenerror', errorHandler, false);
		} else if (document.mozFullScreenEnabled) {
		  document.addEventListener('mozfullscreenerror', errorHandler, false);
		} else if (document.msFullscreenEnabled) {
		  element.addEventListener('msfullscreenerror', errorHandler, false);
		}
	  }
	};
	VRDisplay.prototype.removeFullscreenListeners_ = function () {
	  if (!this.fullscreenEventTarget_) return;
	  var element = this.fullscreenEventTarget_;
	  if (this.fullscreenChangeHandler_) {
		var changeHandler = this.fullscreenChangeHandler_;
		element.removeEventListener('fullscreenchange', changeHandler, false);
		element.removeEventListener('webkitfullscreenchange', changeHandler, false);
		document.removeEventListener('mozfullscreenchange', changeHandler, false);
		element.removeEventListener('msfullscreenchange', changeHandler, false);
	  }
	  if (this.fullscreenErrorHandler_) {
		var errorHandler = this.fullscreenErrorHandler_;
		element.removeEventListener('fullscreenerror', errorHandler, false);
		element.removeEventListener('webkitfullscreenerror', errorHandler, false);
		document.removeEventListener('mozfullscreenerror', errorHandler, false);
		element.removeEventListener('msfullscreenerror', errorHandler, false);
	  }
	  this.fullscreenEventTarget_ = null;
	  this.fullscreenChangeHandler_ = null;
	  this.fullscreenErrorHandler_ = null;
	};
	VRDisplay.prototype.enableWakeLock = function () {
	  if (this.wakelock_) {
		this.wakelock_.enable();
	  }
	};
	VRDisplay.prototype.disableWakeLock = function () {
	  if (this.wakelock_) {
		this.wakelock_.disable();
	  }
	};
	VRDisplay.prototype.beginPresent_ = function () {
	};
	VRDisplay.prototype.endPresent_ = function () {
	};
	VRDisplay.prototype.submitFrame = function (pose) {
	};
	VRDisplay.prototype.getEyeParameters = function (whichEye) {
	  return null;
	};
	var config = {
	  ADDITIONAL_VIEWERS: [],
	  DEFAULT_VIEWER: '',
	  MOBILE_WAKE_LOCK: true,
	  DEBUG: false,
	  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',
	  K_FILTER: 0.98,
	  PREDICTION_TIME_S: 0.040,
	  CARDBOARD_UI_DISABLED: false,
	  ROTATE_INSTRUCTIONS_DISABLED: false,
	  YAW_ONLY: false,
	  BUFFER_SCALE: 0.5,
	  DIRTY_SUBMIT_FRAME_BINDINGS: false
	};
	var Eye = {
	  LEFT: 'left',
	  RIGHT: 'right'
	};
	function CardboardVRDisplay(config$$1) {
	  var defaults = extend({}, config);
	  config$$1 = extend(defaults, config$$1 || {});
	  VRDisplay.call(this, {
		wakelock: config$$1.MOBILE_WAKE_LOCK
	  });
	  this.config = config$$1;
	  this.displayName = 'Cardboard VRDisplay';
	  this.capabilities = new VRDisplayCapabilities({
		hasPosition: false,
		hasOrientation: true,
		hasExternalDisplay: false,
		canPresent: true,
		maxLayers: 1
	  });
	  this.stageParameters = null;
	  this.bufferScale_ = this.config.BUFFER_SCALE;
	  this.poseSensor_ = new PoseSensor(this.config);
	  this.distorter_ = null;
	  this.cardboardUI_ = null;
	  this.dpdb_ = new Dpdb(this.config.DPDB_URL, this.onDeviceParamsUpdated_.bind(this));
	  this.deviceInfo_ = new DeviceInfo(this.dpdb_.getDeviceParams(), config$$1.ADDITIONAL_VIEWERS);
	  this.viewerSelector_ = new ViewerSelector(config$$1.DEFAULT_VIEWER);
	  this.viewerSelector_.onChange(this.onViewerChanged_.bind(this));
	  this.deviceInfo_.setViewer(this.viewerSelector_.getCurrentViewer());
	  if (!this.config.ROTATE_INSTRUCTIONS_DISABLED) {
		this.rotateInstructions_ = new RotateInstructions();
	  }
	  if (isIOS()) {
		window.addEventListener('resize', this.onResize_.bind(this));
	  }
	}
	CardboardVRDisplay.prototype = Object.create(VRDisplay.prototype);
	CardboardVRDisplay.prototype._getPose = function () {
	  return {
		position: null,
		orientation: this.poseSensor_.getOrientation(),
		linearVelocity: null,
		linearAcceleration: null,
		angularVelocity: null,
		angularAcceleration: null
	  };
	};
	CardboardVRDisplay.prototype._resetPose = function () {
	  if (this.poseSensor_.resetPose) {
		this.poseSensor_.resetPose();
	  }
	};
	CardboardVRDisplay.prototype._getFieldOfView = function (whichEye) {
	  var fieldOfView;
	  if (whichEye == Eye.LEFT) {
		fieldOfView = this.deviceInfo_.getFieldOfViewLeftEye();
	  } else if (whichEye == Eye.RIGHT) {
		fieldOfView = this.deviceInfo_.getFieldOfViewRightEye();
	  } else {
		console.error('Invalid eye provided: %s', whichEye);
		return null;
	  }
	  return fieldOfView;
	};
	CardboardVRDisplay.prototype._getEyeOffset = function (whichEye) {
	  var offset;
	  if (whichEye == Eye.LEFT) {
		offset = [-this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];
	  } else if (whichEye == Eye.RIGHT) {
		offset = [this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];
	  } else {
		console.error('Invalid eye provided: %s', whichEye);
		return null;
	  }
	  return offset;
	};
	CardboardVRDisplay.prototype.getEyeParameters = function (whichEye) {
	  var offset = this._getEyeOffset(whichEye);
	  var fieldOfView = this._getFieldOfView(whichEye);
	  var eyeParams = {
		offset: offset,
		renderWidth: this.deviceInfo_.device.width * 0.5 * this.bufferScale_,
		renderHeight: this.deviceInfo_.device.height * this.bufferScale_
	  };
	  Object.defineProperty(eyeParams, 'fieldOfView', {
		enumerable: true,
		get: function get() {
		  deprecateWarning('VRFieldOfView', 'VRFrameData\'s projection matrices');
		  return fieldOfView;
		}
	  });
	  return eyeParams;
	};
	CardboardVRDisplay.prototype.onDeviceParamsUpdated_ = function (newParams) {
	  if (this.config.DEBUG) {
		console.log('DPDB reported that device params were updated.');
	  }
	  this.deviceInfo_.updateDeviceParams(newParams);
	  if (this.distorter_) {
		this.distorter_.updateDeviceInfo(this.deviceInfo_);
	  }
	};
	CardboardVRDisplay.prototype.updateBounds_ = function () {
	  if (this.layer_ && this.distorter_ && (this.layer_.leftBounds || this.layer_.rightBounds)) {
		this.distorter_.setTextureBounds(this.layer_.leftBounds, this.layer_.rightBounds);
	  }
	};
	CardboardVRDisplay.prototype.beginPresent_ = function () {
	  var gl = this.layer_.source.getContext('webgl');
	  if (!gl) gl = this.layer_.source.getContext('experimental-webgl');
	  if (!gl) gl = this.layer_.source.getContext('webgl2');
	  if (!gl) return;
	  if (this.layer_.predistorted) {
		if (!this.config.CARDBOARD_UI_DISABLED) {
		  gl.canvas.width = getScreenWidth() * this.bufferScale_;
		  gl.canvas.height = getScreenHeight() * this.bufferScale_;
		  this.cardboardUI_ = new CardboardUI(gl);
		}
	  } else {
		if (!this.config.CARDBOARD_UI_DISABLED) {
		  this.cardboardUI_ = new CardboardUI(gl);
		}
		this.distorter_ = new CardboardDistorter(gl, this.cardboardUI_, this.config.BUFFER_SCALE, this.config.DIRTY_SUBMIT_FRAME_BINDINGS);
		this.distorter_.updateDeviceInfo(this.deviceInfo_);
	  }
	  if (this.cardboardUI_) {
		this.cardboardUI_.listen(function (e) {
		  this.viewerSelector_.show(this.layer_.source.parentElement);
		  e.stopPropagation();
		  e.preventDefault();
		}.bind(this), function (e) {
		  this.exitPresent();
		  e.stopPropagation();
		  e.preventDefault();
		}.bind(this));
	  }
	  if (this.rotateInstructions_) {
		if (isLandscapeMode() && isMobile()) {
		  this.rotateInstructions_.showTemporarily(3000, this.layer_.source.parentElement);
		} else {
		  this.rotateInstructions_.update();
		}
	  }
	  this.orientationHandler = this.onOrientationChange_.bind(this);
	  window.addEventListener('orientationchange', this.orientationHandler);
	  this.vrdisplaypresentchangeHandler = this.updateBounds_.bind(this);
	  window.addEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);
	  this.fireVRDisplayDeviceParamsChange_();
	};
	CardboardVRDisplay.prototype.endPresent_ = function () {
	  if (this.distorter_) {
		this.distorter_.destroy();
		this.distorter_ = null;
	  }
	  if (this.cardboardUI_) {
		this.cardboardUI_.destroy();
		this.cardboardUI_ = null;
	  }
	  if (this.rotateInstructions_) {
		this.rotateInstructions_.hide();
	  }
	  this.viewerSelector_.hide();
	  window.removeEventListener('orientationchange', this.orientationHandler);
	  window.removeEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);
	};
	CardboardVRDisplay.prototype.updatePresent_ = function () {
	  this.endPresent_();
	  this.beginPresent_();
	};
	CardboardVRDisplay.prototype.submitFrame = function (pose) {
	  if (this.distorter_) {
		this.updateBounds_();
		this.distorter_.submitFrame();
	  } else if (this.cardboardUI_ && this.layer_) {
		var canvas = this.layer_.source.getContext('webgl').canvas;
		if (canvas.width != this.lastWidth || canvas.height != this.lastHeight) {
		  this.cardboardUI_.onResize();
		}
		this.lastWidth = canvas.width;
		this.lastHeight = canvas.height;
		this.cardboardUI_.render();
	  }
	};
	CardboardVRDisplay.prototype.onOrientationChange_ = function (e) {
	  this.viewerSelector_.hide();
	  if (this.rotateInstructions_) {
		this.rotateInstructions_.update();
	  }
	  this.onResize_();
	};
	CardboardVRDisplay.prototype.onResize_ = function (e) {
	  if (this.layer_) {
		var gl = this.layer_.source.getContext('webgl');
		var cssProperties = ['position: absolute', 'top: 0', 'left: 0',
		'width: 100vw', 'height: 100vh', 'border: 0', 'margin: 0',
		'padding: 0px', 'box-sizing: content-box'];
		gl.canvas.setAttribute('style', cssProperties.join('; ') + ';');
		safariCssSizeWorkaround(gl.canvas);
	  }
	};
	CardboardVRDisplay.prototype.onViewerChanged_ = function (viewer) {
	  this.deviceInfo_.setViewer(viewer);
	  if (this.distorter_) {
		this.distorter_.updateDeviceInfo(this.deviceInfo_);
	  }
	  this.fireVRDisplayDeviceParamsChange_();
	};
	CardboardVRDisplay.prototype.fireVRDisplayDeviceParamsChange_ = function () {
	  var event = new CustomEvent('vrdisplaydeviceparamschange', {
		detail: {
		  vrdisplay: this,
		  deviceInfo: this.deviceInfo_
		}
	  });
	  window.dispatchEvent(event);
	};
	CardboardVRDisplay.VRFrameData = VRFrameData;
	CardboardVRDisplay.VRDisplay = VRDisplay;
	return CardboardVRDisplay;
	})));
	});
	var CardboardVRDisplay = unwrapExports(cardboardVrDisplay);
  
	var version = "0.10.6";
  
	var DefaultConfig = {
	  ADDITIONAL_VIEWERS: [],
	  DEFAULT_VIEWER: '',
	  PROVIDE_MOBILE_VRDISPLAY: true,
	  GET_VR_DISPLAYS_TIMEOUT: 1000,
	  MOBILE_WAKE_LOCK: true,
	  DEBUG: false,
	  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',
	  K_FILTER: 0.98,
	  PREDICTION_TIME_S: 0.040,
	  TOUCH_PANNER_DISABLED: true,
	  CARDBOARD_UI_DISABLED: false,
	  ROTATE_INSTRUCTIONS_DISABLED: false,
	  YAW_ONLY: false,
	  BUFFER_SCALE: 0.5,
	  DIRTY_SUBMIT_FRAME_BINDINGS: false
	};
  
	function WebVRPolyfill(config) {
	  this.config = extend(extend({}, DefaultConfig), config);
	  this.polyfillDisplays = [];
	  this.enabled = false;
	  this.hasNative = 'getVRDisplays' in navigator;
	  this.native = {};
	  this.native.getVRDisplays = navigator.getVRDisplays;
	  this.native.VRFrameData = window.VRFrameData;
	  this.native.VRDisplay = window.VRDisplay;
	  if (!this.hasNative || this.config.PROVIDE_MOBILE_VRDISPLAY && isMobile()) {
		this.enable();
		this.getVRDisplays().then(function (displays) {
		  if (displays && displays[0] && displays[0].fireVRDisplayConnect_) {
			displays[0].fireVRDisplayConnect_();
		  }
		});
	  }
	}
	WebVRPolyfill.prototype.getPolyfillDisplays = function () {
	  if (this._polyfillDisplaysPopulated) {
		return this.polyfillDisplays;
	  }
	  if (isMobile()) {
		var vrDisplay = new CardboardVRDisplay({
		  ADDITIONAL_VIEWERS: this.config.ADDITIONAL_VIEWERS,
		  DEFAULT_VIEWER: this.config.DEFAULT_VIEWER,
		  MOBILE_WAKE_LOCK: this.config.MOBILE_WAKE_LOCK,
		  DEBUG: this.config.DEBUG,
		  DPDB_URL: this.config.DPDB_URL,
		  CARDBOARD_UI_DISABLED: this.config.CARDBOARD_UI_DISABLED,
		  K_FILTER: this.config.K_FILTER,
		  PREDICTION_TIME_S: this.config.PREDICTION_TIME_S,
		  TOUCH_PANNER_DISABLED: this.config.TOUCH_PANNER_DISABLED,
		  ROTATE_INSTRUCTIONS_DISABLED: this.config.ROTATE_INSTRUCTIONS_DISABLED,
		  YAW_ONLY: this.config.YAW_ONLY,
		  BUFFER_SCALE: this.config.BUFFER_SCALE,
		  DIRTY_SUBMIT_FRAME_BINDINGS: this.config.DIRTY_SUBMIT_FRAME_BINDINGS
		});
		this.polyfillDisplays.push(vrDisplay);
	  }
	  this._polyfillDisplaysPopulated = true;
	  return this.polyfillDisplays;
	};
	WebVRPolyfill.prototype.enable = function () {
	  this.enabled = true;
	  if (this.hasNative && this.native.VRFrameData) {
		var NativeVRFrameData = this.native.VRFrameData;
		var nativeFrameData = new this.native.VRFrameData();
		var nativeGetFrameData = this.native.VRDisplay.prototype.getFrameData;
		window.VRDisplay.prototype.getFrameData = function (frameData) {
		  if (frameData instanceof NativeVRFrameData) {
			nativeGetFrameData.call(this, frameData);
			return;
		  }
		  nativeGetFrameData.call(this, nativeFrameData);
		  frameData.pose = nativeFrameData.pose;
		  copyArray(nativeFrameData.leftProjectionMatrix, frameData.leftProjectionMatrix);
		  copyArray(nativeFrameData.rightProjectionMatrix, frameData.rightProjectionMatrix);
		  copyArray(nativeFrameData.leftViewMatrix, frameData.leftViewMatrix);
		  copyArray(nativeFrameData.rightViewMatrix, frameData.rightViewMatrix);
		};
	  }
	  navigator.getVRDisplays = this.getVRDisplays.bind(this);
	  window.VRDisplay = CardboardVRDisplay.VRDisplay;
	  window.VRFrameData = CardboardVRDisplay.VRFrameData;
	};
	WebVRPolyfill.prototype.getVRDisplays = function () {
	  var _this = this;
	  var config = this.config;
	  if (!this.hasNative) {
		return Promise.resolve(this.getPolyfillDisplays());
	  }
	  var timeoutId;
	  var vrDisplaysNative = this.native.getVRDisplays.call(navigator);
	  var timeoutPromise = new Promise(function (resolve) {
		timeoutId = setTimeout(function () {
		  console.warn('Native WebVR implementation detected, but `getVRDisplays()` failed to resolve. Falling back to polyfill.');
		  resolve([]);
		}, config.GET_VR_DISPLAYS_TIMEOUT);
	  });
	  return race([vrDisplaysNative, timeoutPromise]).then(function (nativeDisplays) {
		clearTimeout(timeoutId);
		return nativeDisplays.length > 0 ? nativeDisplays : _this.getPolyfillDisplays();
	  });
	};
	WebVRPolyfill.version = version;
	WebVRPolyfill.VRFrameData = CardboardVRDisplay.VRFrameData;
	WebVRPolyfill.VRDisplay = CardboardVRDisplay.VRDisplay;
  
  
	var webvrPolyfill = Object.freeze({
		default: WebVRPolyfill
	});
  
	var require$$0 = ( webvrPolyfill && WebVRPolyfill ) || webvrPolyfill;
  
	if (typeof commonjsGlobal$1 !== 'undefined' && commonjsGlobal$1.window) {
	  if (!commonjsGlobal$1.document) {
		commonjsGlobal$1.document = commonjsGlobal$1.window.document;
	  }
	  if (!commonjsGlobal$1.navigator) {
		commonjsGlobal$1.navigator = commonjsGlobal$1.window.navigator;
	  }
	}
	var src = require$$0;
  
	return src;
  
	})));
	});
  
	var WebVRPolyfill = unwrapExports(webvrPolyfill);
  
	// Polyfills
  
	if ( Number.EPSILON === undefined ) {
  
		Number.EPSILON = Math.pow( 2, - 52 );
  
	}
  
	if ( Number.isInteger === undefined ) {
  
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger
  
		Number.isInteger = function ( value ) {
  
			return typeof value === 'number' && isFinite( value ) && Math.floor( value ) === value;
  
		};
  
	}
  
	//
  
	if ( Math.sign === undefined ) {
  
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
  
		Math.sign = function ( x ) {
  
			return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : + x;
  
		};
  
	}
  
	if ( 'name' in Function.prototype === false ) {
  
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name
  
		Object.defineProperty( Function.prototype, 'name', {
  
			get: function () {
  
				return this.toString().match( /^\s*function\s*([^\(\s]*)/ )[ 1 ];
  
			}
  
		} );
  
	}
  
	if ( Object.assign === undefined ) {
  
		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
  
		( function () {
  
			Object.assign = function ( target ) {
  
				if ( target === undefined || target === null ) {
  
					throw new TypeError( 'Cannot convert undefined or null to object' );
  
				}
  
				var output = Object( target );
  
				for ( var index = 1; index < arguments.length; index ++ ) {
  
					var source = arguments[ index ];
  
					if ( source !== undefined && source !== null ) {
  
						for ( var nextKey in source ) {
  
							if ( Object.prototype.hasOwnProperty.call( source, nextKey ) ) {
  
								output[ nextKey ] = source[ nextKey ];
  
							}
  
						}
  
					}
  
				}
  
				return output;
  
			};
  
		} )();
  
	}
  
	/**
	 * https://github.com/mrdoob/eventdispatcher.js/
	 */
  
	function EventDispatcher() {}
  
	Object.assign( EventDispatcher.prototype, {
  
		addEventListener: function ( type, listener ) {
  
			if ( this._listeners === undefined ) this._listeners = {};
  
			var listeners = this._listeners;
  
			if ( listeners[ type ] === undefined ) {
  
				listeners[ type ] = [];
  
			}
  
			if ( listeners[ type ].indexOf( listener ) === - 1 ) {
  
				listeners[ type ].push( listener );
  
			}
  
		},
  
		hasEventListener: function ( type, listener ) {
  
			if ( this._listeners === undefined ) return false;
  
			var listeners = this._listeners;
  
			return listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;
  
		},
  
		removeEventListener: function ( type, listener ) {
  
			if ( this._listeners === undefined ) return;
  
			var listeners = this._listeners;
			var listenerArray = listeners[ type ];
  
			if ( listenerArray !== undefined ) {
  
				var index = listenerArray.indexOf( listener );
  
				if ( index !== - 1 ) {
  
					listenerArray.splice( index, 1 );
  
				}
  
			}
  
		},
  
		dispatchEvent: function ( event ) {
  
			if ( this._listeners === undefined ) return;
  
			var listeners = this._listeners;
			var listenerArray = listeners[ event.type ];
  
			if ( listenerArray !== undefined ) {
  
				event.target = this;
  
				var array = listenerArray.slice( 0 );
  
				for ( var i = 0, l = array.length; i < l; i ++ ) {
  
					array[ i ].call( this, event );
  
				}
  
			}
  
		}
  
	} );
  
	var REVISION = '93';
	var MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2 };
	var CullFaceNone = 0;
	var CullFaceBack = 1;
	var CullFaceFront = 2;
	var PCFShadowMap = 1;
	var PCFSoftShadowMap = 2;
	var FrontSide = 0;
	var BackSide = 1;
	var DoubleSide = 2;
	var FlatShading = 1;
	var NoColors = 0;
	var FaceColors = 1;
	var VertexColors = 2;
	var NoBlending = 0;
	var NormalBlending = 1;
	var AdditiveBlending = 2;
	var SubtractiveBlending = 3;
	var MultiplyBlending = 4;
	var CustomBlending = 5;
	var AddEquation = 100;
	var SubtractEquation = 101;
	var ReverseSubtractEquation = 102;
	var MinEquation = 103;
	var MaxEquation = 104;
	var ZeroFactor = 200;
	var OneFactor = 201;
	var SrcColorFactor = 202;
	var OneMinusSrcColorFactor = 203;
	var SrcAlphaFactor = 204;
	var OneMinusSrcAlphaFactor = 205;
	var DstAlphaFactor = 206;
	var OneMinusDstAlphaFactor = 207;
	var DstColorFactor = 208;
	var OneMinusDstColorFactor = 209;
	var SrcAlphaSaturateFactor = 210;
	var NeverDepth = 0;
	var AlwaysDepth = 1;
	var LessDepth = 2;
	var LessEqualDepth = 3;
	var EqualDepth = 4;
	var GreaterEqualDepth = 5;
	var GreaterDepth = 6;
	var NotEqualDepth = 7;
	var MultiplyOperation = 0;
	var MixOperation = 1;
	var AddOperation = 2;
	var NoToneMapping = 0;
	var LinearToneMapping = 1;
	var ReinhardToneMapping = 2;
	var Uncharted2ToneMapping = 3;
	var CineonToneMapping = 4;
	var UVMapping = 300;
	var CubeReflectionMapping = 301;
	var CubeRefractionMapping = 302;
	var EquirectangularReflectionMapping = 303;
	var EquirectangularRefractionMapping = 304;
	var SphericalReflectionMapping = 305;
	var CubeUVReflectionMapping = 306;
	var CubeUVRefractionMapping = 307;
	var RepeatWrapping = 1000;
	var ClampToEdgeWrapping = 1001;
	var MirroredRepeatWrapping = 1002;
	var NearestFilter = 1003;
	var NearestMipMapNearestFilter = 1004;
	var NearestMipMapLinearFilter = 1005;
	var LinearFilter = 1006;
	var LinearMipMapNearestFilter = 1007;
	var LinearMipMapLinearFilter = 1008;
	var UnsignedByteType = 1009;
	var ByteType = 1010;
	var ShortType = 1011;
	var UnsignedShortType = 1012;
	var IntType = 1013;
	var UnsignedIntType = 1014;
	var FloatType = 1015;
	var HalfFloatType = 1016;
	var UnsignedShort4444Type = 1017;
	var UnsignedShort5551Type = 1018;
	var UnsignedShort565Type = 1019;
	var UnsignedInt248Type = 1020;
	var AlphaFormat = 1021;
	var RGBFormat = 1022;
	var RGBAFormat = 1023;
	var LuminanceFormat = 1024;
	var LuminanceAlphaFormat = 1025;
	var DepthFormat = 1026;
	var DepthStencilFormat = 1027;
	var RGB_S3TC_DXT1_Format = 33776;
	var RGBA_S3TC_DXT1_Format = 33777;
	var RGBA_S3TC_DXT3_Format = 33778;
	var RGBA_S3TC_DXT5_Format = 33779;
	var RGB_PVRTC_4BPPV1_Format = 35840;
	var RGB_PVRTC_2BPPV1_Format = 35841;
	var RGBA_PVRTC_4BPPV1_Format = 35842;
	var RGBA_PVRTC_2BPPV1_Format = 35843;
	var RGB_ETC1_Format = 36196;
	var RGBA_ASTC_4x4_Format = 37808;
	var RGBA_ASTC_5x4_Format = 37809;
	var RGBA_ASTC_5x5_Format = 37810;
	var RGBA_ASTC_6x5_Format = 37811;
	var RGBA_ASTC_6x6_Format = 37812;
	var RGBA_ASTC_8x5_Format = 37813;
	var RGBA_ASTC_8x6_Format = 37814;
	var RGBA_ASTC_8x8_Format = 37815;
	var RGBA_ASTC_10x5_Format = 37816;
	var RGBA_ASTC_10x6_Format = 37817;
	var RGBA_ASTC_10x8_Format = 37818;
	var RGBA_ASTC_10x10_Format = 37819;
	var RGBA_ASTC_12x10_Format = 37820;
	var RGBA_ASTC_12x12_Format = 37821;
	var LoopOnce = 2200;
	var LoopRepeat = 2201;
	var LoopPingPong = 2202;
	var InterpolateDiscrete = 2300;
	var InterpolateLinear = 2301;
	var InterpolateSmooth = 2302;
	var ZeroCurvatureEnding = 2400;
	var ZeroSlopeEnding = 2401;
	var WrapAroundEnding = 2402;
	var TrianglesDrawMode = 0;
	var TriangleStripDrawMode = 1;
	var TriangleFanDrawMode = 2;
	var LinearEncoding = 3000;
	var sRGBEncoding = 3001;
	var GammaEncoding = 3007;
	var RGBEEncoding = 3002;
	var RGBM7Encoding = 3004;
	var RGBM16Encoding = 3005;
	var RGBDEncoding = 3006;
	var BasicDepthPacking = 3200;
	var RGBADepthPacking = 3201;
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var _Math = {
  
		DEG2RAD: Math.PI / 180,
		RAD2DEG: 180 / Math.PI,
  
		generateUUID: ( function () {
  
			// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
  
			var lut = [];
  
			for ( var i = 0; i < 256; i ++ ) {
  
				lut[ i ] = ( i < 16 ? '0' : '' ) + ( i ).toString( 16 );
  
			}
  
			return function generateUUID() {
  
				var d0 = Math.random() * 0xffffffff | 0;
				var d1 = Math.random() * 0xffffffff | 0;
				var d2 = Math.random() * 0xffffffff | 0;
				var d3 = Math.random() * 0xffffffff | 0;
				var uuid = lut[ d0 & 0xff ] + lut[ d0 >> 8 & 0xff ] + lut[ d0 >> 16 & 0xff ] + lut[ d0 >> 24 & 0xff ] + '-' +
					lut[ d1 & 0xff ] + lut[ d1 >> 8 & 0xff ] + '-' + lut[ d1 >> 16 & 0x0f | 0x40 ] + lut[ d1 >> 24 & 0xff ] + '-' +
					lut[ d2 & 0x3f | 0x80 ] + lut[ d2 >> 8 & 0xff ] + '-' + lut[ d2 >> 16 & 0xff ] + lut[ d2 >> 24 & 0xff ] +
					lut[ d3 & 0xff ] + lut[ d3 >> 8 & 0xff ] + lut[ d3 >> 16 & 0xff ] + lut[ d3 >> 24 & 0xff ];
  
				// .toUpperCase() here flattens concatenated strings to save heap memory space.
				return uuid.toUpperCase();
  
			};
  
		} )(),
  
		clamp: function ( value, min, max ) {
  
			return Math.max( min, Math.min( max, value ) );
  
		},
  
		// compute euclidian modulo of m % n
		// https://en.wikipedia.org/wiki/Modulo_operation
  
		euclideanModulo: function ( n, m ) {
  
			return ( ( n % m ) + m ) % m;
  
		},
  
		// Linear mapping from range <a1, a2> to range <b1, b2>
  
		mapLinear: function ( x, a1, a2, b1, b2 ) {
  
			return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );
  
		},
  
		// https://en.wikipedia.org/wiki/Linear_interpolation
  
		lerp: function ( x, y, t ) {
  
			return ( 1 - t ) * x + t * y;
  
		},
  
		// http://en.wikipedia.org/wiki/Smoothstep
  
		smoothstep: function ( x, min, max ) {
  
			if ( x <= min ) return 0;
			if ( x >= max ) return 1;
  
			x = ( x - min ) / ( max - min );
  
			return x * x * ( 3 - 2 * x );
  
		},
  
		smootherstep: function ( x, min, max ) {
  
			if ( x <= min ) return 0;
			if ( x >= max ) return 1;
  
			x = ( x - min ) / ( max - min );
  
			return x * x * x * ( x * ( x * 6 - 15 ) + 10 );
  
		},
  
		// Random integer from <low, high> interval
  
		randInt: function ( low, high ) {
  
			return low + Math.floor( Math.random() * ( high - low + 1 ) );
  
		},
  
		// Random float from <low, high> interval
  
		randFloat: function ( low, high ) {
  
			return low + Math.random() * ( high - low );
  
		},
  
		// Random float from <-range/2, range/2> interval
  
		randFloatSpread: function ( range ) {
  
			return range * ( 0.5 - Math.random() );
  
		},
  
		degToRad: function ( degrees ) {
  
			return degrees * _Math.DEG2RAD;
  
		},
  
		radToDeg: function ( radians ) {
  
			return radians * _Math.RAD2DEG;
  
		},
  
		isPowerOfTwo: function ( value ) {
  
			return ( value & ( value - 1 ) ) === 0 && value !== 0;
  
		},
  
		ceilPowerOfTwo: function ( value ) {
  
			return Math.pow( 2, Math.ceil( Math.log( value ) / Math.LN2 ) );
  
		},
  
		floorPowerOfTwo: function ( value ) {
  
			return Math.pow( 2, Math.floor( Math.log( value ) / Math.LN2 ) );
  
		}
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author philogb / http://blog.thejit.org/
	 * @author egraether / http://egraether.com/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 */
  
	function Vector2( x, y ) {
  
		this.x = x || 0;
		this.y = y || 0;
  
	}
  
	Object.defineProperties( Vector2.prototype, {
  
		"width": {
  
			get: function () {
  
				return this.x;
  
			},
  
			set: function ( value ) {
  
				this.x = value;
  
			}
  
		},
  
		"height": {
  
			get: function () {
  
				return this.y;
  
			},
  
			set: function ( value ) {
  
				this.y = value;
  
			}
  
		}
  
	} );
  
	Object.assign( Vector2.prototype, {
  
		isVector2: true,
  
		set: function ( x, y ) {
  
			this.x = x;
			this.y = y;
  
			return this;
  
		},
  
		setScalar: function ( scalar ) {
  
			this.x = scalar;
			this.y = scalar;
  
			return this;
  
		},
  
		setX: function ( x ) {
  
			this.x = x;
  
			return this;
  
		},
  
		setY: function ( y ) {
  
			this.y = y;
  
			return this;
  
		},
  
		setComponent: function ( index, value ) {
  
			switch ( index ) {
  
				case 0: this.x = value; break;
				case 1: this.y = value; break;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
			return this;
  
		},
  
		getComponent: function ( index ) {
  
			switch ( index ) {
  
				case 0: return this.x;
				case 1: return this.y;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
		},
  
		clone: function () {
  
			return new this.constructor( this.x, this.y );
  
		},
  
		copy: function ( v ) {
  
			this.x = v.x;
			this.y = v.y;
  
			return this;
  
		},
  
		add: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );
  
			}
  
			this.x += v.x;
			this.y += v.y;
  
			return this;
  
		},
  
		addScalar: function ( s ) {
  
			this.x += s;
			this.y += s;
  
			return this;
  
		},
  
		addVectors: function ( a, b ) {
  
			this.x = a.x + b.x;
			this.y = a.y + b.y;
  
			return this;
  
		},
  
		addScaledVector: function ( v, s ) {
  
			this.x += v.x * s;
			this.y += v.y * s;
  
			return this;
  
		},
  
		sub: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );
  
			}
  
			this.x -= v.x;
			this.y -= v.y;
  
			return this;
  
		},
  
		subScalar: function ( s ) {
  
			this.x -= s;
			this.y -= s;
  
			return this;
  
		},
  
		subVectors: function ( a, b ) {
  
			this.x = a.x - b.x;
			this.y = a.y - b.y;
  
			return this;
  
		},
  
		multiply: function ( v ) {
  
			this.x *= v.x;
			this.y *= v.y;
  
			return this;
  
		},
  
		multiplyScalar: function ( scalar ) {
  
			this.x *= scalar;
			this.y *= scalar;
  
			return this;
  
		},
  
		divide: function ( v ) {
  
			this.x /= v.x;
			this.y /= v.y;
  
			return this;
  
		},
  
		divideScalar: function ( scalar ) {
  
			return this.multiplyScalar( 1 / scalar );
  
		},
  
		applyMatrix3: function ( m ) {
  
			var x = this.x, y = this.y;
			var e = m.elements;
  
			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];
  
			return this;
  
		},
  
		min: function ( v ) {
  
			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
  
			return this;
  
		},
  
		max: function ( v ) {
  
			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
  
			return this;
  
		},
  
		clamp: function ( min, max ) {
  
			// assumes min < max, componentwise
  
			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
  
			return this;
  
		},
  
		clampScalar: function () {
  
			var min = new Vector2();
			var max = new Vector2();
  
			return function clampScalar( minVal, maxVal ) {
  
				min.set( minVal, minVal );
				max.set( maxVal, maxVal );
  
				return this.clamp( min, max );
  
			};
  
		}(),
  
		clampLength: function ( min, max ) {
  
			var length = this.length();
  
			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );
  
		},
  
		floor: function () {
  
			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
  
			return this;
  
		},
  
		ceil: function () {
  
			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
  
			return this;
  
		},
  
		round: function () {
  
			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
  
			return this;
  
		},
  
		roundToZero: function () {
  
			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
  
			return this;
  
		},
  
		negate: function () {
  
			this.x = - this.x;
			this.y = - this.y;
  
			return this;
  
		},
  
		dot: function ( v ) {
  
			return this.x * v.x + this.y * v.y;
  
		},
  
		lengthSq: function () {
  
			return this.x * this.x + this.y * this.y;
  
		},
  
		length: function () {
  
			return Math.sqrt( this.x * this.x + this.y * this.y );
  
		},
  
		manhattanLength: function () {
  
			return Math.abs( this.x ) + Math.abs( this.y );
  
		},
  
		normalize: function () {
  
			return this.divideScalar( this.length() || 1 );
  
		},
  
		angle: function () {
  
			// computes the angle in radians with respect to the positive x-axis
  
			var angle = Math.atan2( this.y, this.x );
  
			if ( angle < 0 ) angle += 2 * Math.PI;
  
			return angle;
  
		},
  
		distanceTo: function ( v ) {
  
			return Math.sqrt( this.distanceToSquared( v ) );
  
		},
  
		distanceToSquared: function ( v ) {
  
			var dx = this.x - v.x, dy = this.y - v.y;
			return dx * dx + dy * dy;
  
		},
  
		manhattanDistanceTo: function ( v ) {
  
			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );
  
		},
  
		setLength: function ( length ) {
  
			return this.normalize().multiplyScalar( length );
  
		},
  
		lerp: function ( v, alpha ) {
  
			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
  
			return this;
  
		},
  
		lerpVectors: function ( v1, v2, alpha ) {
  
			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );
  
		},
  
		equals: function ( v ) {
  
			return ( ( v.x === this.x ) && ( v.y === this.y ) );
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
  
			return array;
  
		},
  
		fromBufferAttribute: function ( attribute, index, offset ) {
  
			if ( offset !== undefined ) {
  
				console.warn( 'THREE.Vector2: offset has been removed from .fromBufferAttribute().' );
  
			}
  
			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
  
			return this;
  
		},
  
		rotateAround: function ( center, angle ) {
  
			var c = Math.cos( angle ), s = Math.sin( angle );
  
			var x = this.x - center.x;
			var y = this.y - center.y;
  
			this.x = x * c - y * s + center.x;
			this.y = x * s + y * c + center.y;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author philogb / http://blog.thejit.org/
	 * @author jordi_ros / http://plattsoft.com
	 * @author D1plo1d / http://github.com/D1plo1d
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author timknip / http://www.floorplanner.com/
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function Matrix4() {
  
		this.elements = [
  
			1, 0, 0, 0,
			0, 1, 0, 0,
			0, 0, 1, 0,
			0, 0, 0, 1
  
		];
  
		if ( arguments.length > 0 ) {
  
			console.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );
  
		}
  
	}
  
	Object.assign( Matrix4.prototype, {
  
		isMatrix4: true,
  
		set: function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {
  
			var te = this.elements;
  
			te[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;
			te[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;
			te[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;
			te[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;
  
			return this;
  
		},
  
		identity: function () {
  
			this.set(
  
				1, 0, 0, 0,
				0, 1, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		clone: function () {
  
			return new Matrix4().fromArray( this.elements );
  
		},
  
		copy: function ( m ) {
  
			var te = this.elements;
			var me = m.elements;
  
			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ]; te[ 3 ] = me[ 3 ];
			te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ]; te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ];
			te[ 8 ] = me[ 8 ]; te[ 9 ] = me[ 9 ]; te[ 10 ] = me[ 10 ]; te[ 11 ] = me[ 11 ];
			te[ 12 ] = me[ 12 ]; te[ 13 ] = me[ 13 ]; te[ 14 ] = me[ 14 ]; te[ 15 ] = me[ 15 ];
  
			return this;
  
		},
  
		copyPosition: function ( m ) {
  
			var te = this.elements, me = m.elements;
  
			te[ 12 ] = me[ 12 ];
			te[ 13 ] = me[ 13 ];
			te[ 14 ] = me[ 14 ];
  
			return this;
  
		},
  
		extractBasis: function ( xAxis, yAxis, zAxis ) {
  
			xAxis.setFromMatrixColumn( this, 0 );
			yAxis.setFromMatrixColumn( this, 1 );
			zAxis.setFromMatrixColumn( this, 2 );
  
			return this;
  
		},
  
		makeBasis: function ( xAxis, yAxis, zAxis ) {
  
			this.set(
				xAxis.x, yAxis.x, zAxis.x, 0,
				xAxis.y, yAxis.y, zAxis.y, 0,
				xAxis.z, yAxis.z, zAxis.z, 0,
				0, 0, 0, 1
			);
  
			return this;
  
		},
  
		extractRotation: function () {
  
			var v1 = new Vector3();
  
			return function extractRotation( m ) {
  
				// this method does not support reflection matrices
  
				var te = this.elements;
				var me = m.elements;
  
				var scaleX = 1 / v1.setFromMatrixColumn( m, 0 ).length();
				var scaleY = 1 / v1.setFromMatrixColumn( m, 1 ).length();
				var scaleZ = 1 / v1.setFromMatrixColumn( m, 2 ).length();
  
				te[ 0 ] = me[ 0 ] * scaleX;
				te[ 1 ] = me[ 1 ] * scaleX;
				te[ 2 ] = me[ 2 ] * scaleX;
				te[ 3 ] = 0;
  
				te[ 4 ] = me[ 4 ] * scaleY;
				te[ 5 ] = me[ 5 ] * scaleY;
				te[ 6 ] = me[ 6 ] * scaleY;
				te[ 7 ] = 0;
  
				te[ 8 ] = me[ 8 ] * scaleZ;
				te[ 9 ] = me[ 9 ] * scaleZ;
				te[ 10 ] = me[ 10 ] * scaleZ;
				te[ 11 ] = 0;
  
				te[ 12 ] = 0;
				te[ 13 ] = 0;
				te[ 14 ] = 0;
				te[ 15 ] = 1;
  
				return this;
  
			};
  
		}(),
  
		makeRotationFromEuler: function ( euler ) {
  
			if ( ! ( euler && euler.isEuler ) ) {
  
				console.error( 'THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );
  
			}
  
			var te = this.elements;
  
			var x = euler.x, y = euler.y, z = euler.z;
			var a = Math.cos( x ), b = Math.sin( x );
			var c = Math.cos( y ), d = Math.sin( y );
			var e = Math.cos( z ), f = Math.sin( z );
  
			if ( euler.order === 'XYZ' ) {
  
				var ae = a * e, af = a * f, be = b * e, bf = b * f;
  
				te[ 0 ] = c * e;
				te[ 4 ] = - c * f;
				te[ 8 ] = d;
  
				te[ 1 ] = af + be * d;
				te[ 5 ] = ae - bf * d;
				te[ 9 ] = - b * c;
  
				te[ 2 ] = bf - ae * d;
				te[ 6 ] = be + af * d;
				te[ 10 ] = a * c;
  
			} else if ( euler.order === 'YXZ' ) {
  
				var ce = c * e, cf = c * f, de = d * e, df = d * f;
  
				te[ 0 ] = ce + df * b;
				te[ 4 ] = de * b - cf;
				te[ 8 ] = a * d;
  
				te[ 1 ] = a * f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b;
  
				te[ 2 ] = cf * b - de;
				te[ 6 ] = df + ce * b;
				te[ 10 ] = a * c;
  
			} else if ( euler.order === 'ZXY' ) {
  
				var ce = c * e, cf = c * f, de = d * e, df = d * f;
  
				te[ 0 ] = ce - df * b;
				te[ 4 ] = - a * f;
				te[ 8 ] = de + cf * b;
  
				te[ 1 ] = cf + de * b;
				te[ 5 ] = a * e;
				te[ 9 ] = df - ce * b;
  
				te[ 2 ] = - a * d;
				te[ 6 ] = b;
				te[ 10 ] = a * c;
  
			} else if ( euler.order === 'ZYX' ) {
  
				var ae = a * e, af = a * f, be = b * e, bf = b * f;
  
				te[ 0 ] = c * e;
				te[ 4 ] = be * d - af;
				te[ 8 ] = ae * d + bf;
  
				te[ 1 ] = c * f;
				te[ 5 ] = bf * d + ae;
				te[ 9 ] = af * d - be;
  
				te[ 2 ] = - d;
				te[ 6 ] = b * c;
				te[ 10 ] = a * c;
  
			} else if ( euler.order === 'YZX' ) {
  
				var ac = a * c, ad = a * d, bc = b * c, bd = b * d;
  
				te[ 0 ] = c * e;
				te[ 4 ] = bd - ac * f;
				te[ 8 ] = bc * f + ad;
  
				te[ 1 ] = f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b * e;
  
				te[ 2 ] = - d * e;
				te[ 6 ] = ad * f + bc;
				te[ 10 ] = ac - bd * f;
  
			} else if ( euler.order === 'XZY' ) {
  
				var ac = a * c, ad = a * d, bc = b * c, bd = b * d;
  
				te[ 0 ] = c * e;
				te[ 4 ] = - f;
				te[ 8 ] = d * e;
  
				te[ 1 ] = ac * f + bd;
				te[ 5 ] = a * e;
				te[ 9 ] = ad * f - bc;
  
				te[ 2 ] = bc * f - ad;
				te[ 6 ] = b * e;
				te[ 10 ] = bd * f + ac;
  
			}
  
			// bottom row
			te[ 3 ] = 0;
			te[ 7 ] = 0;
			te[ 11 ] = 0;
  
			// last column
			te[ 12 ] = 0;
			te[ 13 ] = 0;
			te[ 14 ] = 0;
			te[ 15 ] = 1;
  
			return this;
  
		},
  
		makeRotationFromQuaternion: function () {
  
			var zero = new Vector3( 0, 0, 0 );
			var one = new Vector3( 1, 1, 1 );
  
			return function makeRotationFromQuaternion( q ) {
  
				return this.compose( zero, q, one );
  
			};
  
		}(),
  
		lookAt: function () {
  
			var x = new Vector3();
			var y = new Vector3();
			var z = new Vector3();
  
			return function lookAt( eye, target, up ) {
  
				var te = this.elements;
  
				z.subVectors( eye, target );
  
				if ( z.lengthSq() === 0 ) {
  
					// eye and target are in the same position
  
					z.z = 1;
  
				}
  
				z.normalize();
				x.crossVectors( up, z );
  
				if ( x.lengthSq() === 0 ) {
  
					// up and z are parallel
  
					if ( Math.abs( up.z ) === 1 ) {
  
						z.x += 0.0001;
  
					} else {
  
						z.z += 0.0001;
  
					}
  
					z.normalize();
					x.crossVectors( up, z );
  
				}
  
				x.normalize();
				y.crossVectors( z, x );
  
				te[ 0 ] = x.x; te[ 4 ] = y.x; te[ 8 ] = z.x;
				te[ 1 ] = x.y; te[ 5 ] = y.y; te[ 9 ] = z.y;
				te[ 2 ] = x.z; te[ 6 ] = y.z; te[ 10 ] = z.z;
  
				return this;
  
			};
  
		}(),
  
		multiply: function ( m, n ) {
  
			if ( n !== undefined ) {
  
				console.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );
				return this.multiplyMatrices( m, n );
  
			}
  
			return this.multiplyMatrices( this, m );
  
		},
  
		premultiply: function ( m ) {
  
			return this.multiplyMatrices( m, this );
  
		},
  
		multiplyMatrices: function ( a, b ) {
  
			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;
  
			var a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];
			var a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];
			var a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];
			var a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];
  
			var b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];
			var b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];
			var b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];
			var b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];
  
			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
			te[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
			te[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
			te[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
  
			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
			te[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
			te[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
			te[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
  
			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
			te[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
			te[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
			te[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
  
			te[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
			te[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
			te[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
			te[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
  
			return this;
  
		},
  
		multiplyScalar: function ( s ) {
  
			var te = this.elements;
  
			te[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;
			te[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;
			te[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;
			te[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;
  
			return this;
  
		},
  
		applyToBufferAttribute: function () {
  
			var v1 = new Vector3();
  
			return function applyToBufferAttribute( attribute ) {
  
				for ( var i = 0, l = attribute.count; i < l; i ++ ) {
  
					v1.x = attribute.getX( i );
					v1.y = attribute.getY( i );
					v1.z = attribute.getZ( i );
  
					v1.applyMatrix4( this );
  
					attribute.setXYZ( i, v1.x, v1.y, v1.z );
  
				}
  
				return attribute;
  
			};
  
		}(),
  
		determinant: function () {
  
			var te = this.elements;
  
			var n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];
			var n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];
			var n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];
			var n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];
  
			//TODO: make this more efficient
			//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )
  
			return (
				n41 * (
					+ n14 * n23 * n32
					 - n13 * n24 * n32
					 - n14 * n22 * n33
					 + n12 * n24 * n33
					 + n13 * n22 * n34
					 - n12 * n23 * n34
				) +
				n42 * (
					+ n11 * n23 * n34
					 - n11 * n24 * n33
					 + n14 * n21 * n33
					 - n13 * n21 * n34
					 + n13 * n24 * n31
					 - n14 * n23 * n31
				) +
				n43 * (
					+ n11 * n24 * n32
					 - n11 * n22 * n34
					 - n14 * n21 * n32
					 + n12 * n21 * n34
					 + n14 * n22 * n31
					 - n12 * n24 * n31
				) +
				n44 * (
					- n13 * n22 * n31
					 - n11 * n23 * n32
					 + n11 * n22 * n33
					 + n13 * n21 * n32
					 - n12 * n21 * n33
					 + n12 * n23 * n31
				)
  
			);
  
		},
  
		transpose: function () {
  
			var te = this.elements;
			var tmp;
  
			tmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;
			tmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;
			tmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;
  
			tmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;
			tmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;
			tmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;
  
			return this;
  
		},
  
		setPosition: function ( v ) {
  
			var te = this.elements;
  
			te[ 12 ] = v.x;
			te[ 13 ] = v.y;
			te[ 14 ] = v.z;
  
			return this;
  
		},
  
		getInverse: function ( m, throwOnDegenerate ) {
  
			// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
			var te = this.elements,
				me = m.elements,
  
				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ], n41 = me[ 3 ],
				n12 = me[ 4 ], n22 = me[ 5 ], n32 = me[ 6 ], n42 = me[ 7 ],
				n13 = me[ 8 ], n23 = me[ 9 ], n33 = me[ 10 ], n43 = me[ 11 ],
				n14 = me[ 12 ], n24 = me[ 13 ], n34 = me[ 14 ], n44 = me[ 15 ],
  
				t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
				t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
				t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
				t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
  
			var det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;
  
			if ( det === 0 ) {
  
				var msg = "THREE.Matrix4: .getInverse() can't invert matrix, determinant is 0";
  
				if ( throwOnDegenerate === true ) {
  
					throw new Error( msg );
  
				} else {
  
					console.warn( msg );
  
				}
  
				return this.identity();
  
			}
  
			var detInv = 1 / det;
  
			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;
			te[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;
			te[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;
  
			te[ 4 ] = t12 * detInv;
			te[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;
			te[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;
			te[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;
  
			te[ 8 ] = t13 * detInv;
			te[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;
			te[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;
			te[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;
  
			te[ 12 ] = t14 * detInv;
			te[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;
			te[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;
			te[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;
  
			return this;
  
		},
  
		scale: function ( v ) {
  
			var te = this.elements;
			var x = v.x, y = v.y, z = v.z;
  
			te[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;
			te[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;
			te[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;
			te[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;
  
			return this;
  
		},
  
		getMaxScaleOnAxis: function () {
  
			var te = this.elements;
  
			var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
			var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
			var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];
  
			return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );
  
		},
  
		makeTranslation: function ( x, y, z ) {
  
			this.set(
  
				1, 0, 0, x,
				0, 1, 0, y,
				0, 0, 1, z,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		makeRotationX: function ( theta ) {
  
			var c = Math.cos( theta ), s = Math.sin( theta );
  
			this.set(
  
				1, 0, 0, 0,
				0, c, - s, 0,
				0, s, c, 0,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		makeRotationY: function ( theta ) {
  
			var c = Math.cos( theta ), s = Math.sin( theta );
  
			this.set(
  
				 c, 0, s, 0,
				 0, 1, 0, 0,
				- s, 0, c, 0,
				 0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		makeRotationZ: function ( theta ) {
  
			var c = Math.cos( theta ), s = Math.sin( theta );
  
			this.set(
  
				c, - s, 0, 0,
				s, c, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		makeRotationAxis: function ( axis, angle ) {
  
			// Based on http://www.gamedev.net/reference/articles/article1199.asp
  
			var c = Math.cos( angle );
			var s = Math.sin( angle );
			var t = 1 - c;
			var x = axis.x, y = axis.y, z = axis.z;
			var tx = t * x, ty = t * y;
  
			this.set(
  
				tx * x + c, tx * y - s * z, tx * z + s * y, 0,
				tx * y + s * z, ty * y + c, ty * z - s * x, 0,
				tx * z - s * y, ty * z + s * x, t * z * z + c, 0,
				0, 0, 0, 1
  
			);
  
			 return this;
  
		},
  
		makeScale: function ( x, y, z ) {
  
			this.set(
  
				x, 0, 0, 0,
				0, y, 0, 0,
				0, 0, z, 0,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		makeShear: function ( x, y, z ) {
  
			this.set(
  
				1, y, z, 0,
				x, 1, z, 0,
				x, y, 1, 0,
				0, 0, 0, 1
  
			);
  
			return this;
  
		},
  
		compose: function ( position, quaternion, scale ) {
  
			var te = this.elements;
  
			var x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;
			var x2 = x + x,	y2 = y + y, z2 = z + z;
			var xx = x * x2, xy = x * y2, xz = x * z2;
			var yy = y * y2, yz = y * z2, zz = z * z2;
			var wx = w * x2, wy = w * y2, wz = w * z2;
  
			var sx = scale.x, sy = scale.y, sz = scale.z;
  
				te[ 0 ] = ( 1 - ( yy + zz ) ) * sx;
				te[ 1 ] = ( xy + wz ) * sx;
				te[ 2 ] = ( xz - wy ) * sx;
				te[ 3 ] = 0;
  
				te[ 4 ] = ( xy - wz ) * sy;
				te[ 5 ] = ( 1 - ( xx + zz ) ) * sy;
				te[ 6 ] = ( yz + wx ) * sy;
				te[ 7 ] = 0;
  
				te[ 8 ] = ( xz + wy ) * sz;
				te[ 9 ] = ( yz - wx ) * sz;
				te[ 10 ] = ( 1 - ( xx + yy ) ) * sz;
				te[ 11 ] = 0;
  
				te[ 12 ] = position.x;
				te[ 13 ] = position.y;
				te[ 14 ] = position.z;
				te[ 15 ] = 1;
  
				return this;
  
		},
  
		decompose: function () {
  
			var vector = new Vector3();
			var matrix = new Matrix4();
  
			return function decompose( position, quaternion, scale ) {
  
				var te = this.elements;
  
				var sx = vector.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();
				var sy = vector.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();
				var sz = vector.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();
  
				// if determine is negative, we need to invert one scale
				var det = this.determinant();
				if ( det < 0 ) sx = - sx;
  
				position.x = te[ 12 ];
				position.y = te[ 13 ];
				position.z = te[ 14 ];
  
				// scale the rotation part
				matrix.copy( this );
  
				var invSX = 1 / sx;
				var invSY = 1 / sy;
				var invSZ = 1 / sz;
  
				matrix.elements[ 0 ] *= invSX;
				matrix.elements[ 1 ] *= invSX;
				matrix.elements[ 2 ] *= invSX;
  
				matrix.elements[ 4 ] *= invSY;
				matrix.elements[ 5 ] *= invSY;
				matrix.elements[ 6 ] *= invSY;
  
				matrix.elements[ 8 ] *= invSZ;
				matrix.elements[ 9 ] *= invSZ;
				matrix.elements[ 10 ] *= invSZ;
  
				quaternion.setFromRotationMatrix( matrix );
  
				scale.x = sx;
				scale.y = sy;
				scale.z = sz;
  
				return this;
  
			};
  
		}(),
  
		makePerspective: function ( left, right, top, bottom, near, far ) {
  
			if ( far === undefined ) {
  
				console.warn( 'THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.' );
  
			}
  
			var te = this.elements;
			var x = 2 * near / ( right - left );
			var y = 2 * near / ( top - bottom );
  
			var a = ( right + left ) / ( right - left );
			var b = ( top + bottom ) / ( top - bottom );
			var c = - ( far + near ) / ( far - near );
			var d = - 2 * far * near / ( far - near );
  
			te[ 0 ] = x;	te[ 4 ] = 0;	te[ 8 ] = a;	te[ 12 ] = 0;
			te[ 1 ] = 0;	te[ 5 ] = y;	te[ 9 ] = b;	te[ 13 ] = 0;
			te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = c;	te[ 14 ] = d;
			te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = - 1;	te[ 15 ] = 0;
  
			return this;
  
		},
  
		makeOrthographic: function ( left, right, top, bottom, near, far ) {
  
			var te = this.elements;
			var w = 1.0 / ( right - left );
			var h = 1.0 / ( top - bottom );
			var p = 1.0 / ( far - near );
  
			var x = ( right + left ) * w;
			var y = ( top + bottom ) * h;
			var z = ( far + near ) * p;
  
			te[ 0 ] = 2 * w;	te[ 4 ] = 0;	te[ 8 ] = 0;	te[ 12 ] = - x;
			te[ 1 ] = 0;	te[ 5 ] = 2 * h;	te[ 9 ] = 0;	te[ 13 ] = - y;
			te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = - 2 * p;	te[ 14 ] = - z;
			te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = 0;	te[ 15 ] = 1;
  
			return this;
  
		},
  
		equals: function ( matrix ) {
  
			var te = this.elements;
			var me = matrix.elements;
  
			for ( var i = 0; i < 16; i ++ ) {
  
				if ( te[ i ] !== me[ i ] ) return false;
  
			}
  
			return true;
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			for ( var i = 0; i < 16; i ++ ) {
  
				this.elements[ i ] = array[ i + offset ];
  
			}
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			var te = this.elements;
  
			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];
			array[ offset + 3 ] = te[ 3 ];
  
			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];
			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];
  
			array[ offset + 8 ] = te[ 8 ];
			array[ offset + 9 ] = te[ 9 ];
			array[ offset + 10 ] = te[ 10 ];
			array[ offset + 11 ] = te[ 11 ];
  
			array[ offset + 12 ] = te[ 12 ];
			array[ offset + 13 ] = te[ 13 ];
			array[ offset + 14 ] = te[ 14 ];
			array[ offset + 15 ] = te[ 15 ];
  
			return array;
  
		}
  
	} );
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 */
  
	function Quaternion( x, y, z, w ) {
  
		this._x = x || 0;
		this._y = y || 0;
		this._z = z || 0;
		this._w = ( w !== undefined ) ? w : 1;
  
	}
  
	Object.assign( Quaternion, {
  
		slerp: function ( qa, qb, qm, t ) {
  
			return qm.copy( qa ).slerp( qb, t );
  
		},
  
		slerpFlat: function ( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {
  
			// fuzz-free, array-based Quaternion SLERP operation
  
			var x0 = src0[ srcOffset0 + 0 ],
				y0 = src0[ srcOffset0 + 1 ],
				z0 = src0[ srcOffset0 + 2 ],
				w0 = src0[ srcOffset0 + 3 ],
  
				x1 = src1[ srcOffset1 + 0 ],
				y1 = src1[ srcOffset1 + 1 ],
				z1 = src1[ srcOffset1 + 2 ],
				w1 = src1[ srcOffset1 + 3 ];
  
			if ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {
  
				var s = 1 - t,
  
					cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,
  
					dir = ( cos >= 0 ? 1 : - 1 ),
					sqrSin = 1 - cos * cos;
  
				// Skip the Slerp for tiny steps to avoid numeric problems:
				if ( sqrSin > Number.EPSILON ) {
  
					var sin = Math.sqrt( sqrSin ),
						len = Math.atan2( sin, cos * dir );
  
					s = Math.sin( s * len ) / sin;
					t = Math.sin( t * len ) / sin;
  
				}
  
				var tDir = t * dir;
  
				x0 = x0 * s + x1 * tDir;
				y0 = y0 * s + y1 * tDir;
				z0 = z0 * s + z1 * tDir;
				w0 = w0 * s + w1 * tDir;
  
				// Normalize in case we just did a lerp:
				if ( s === 1 - t ) {
  
					var f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );
  
					x0 *= f;
					y0 *= f;
					z0 *= f;
					w0 *= f;
  
				}
  
			}
  
			dst[ dstOffset ] = x0;
			dst[ dstOffset + 1 ] = y0;
			dst[ dstOffset + 2 ] = z0;
			dst[ dstOffset + 3 ] = w0;
  
		}
  
	} );
  
	Object.defineProperties( Quaternion.prototype, {
  
		x: {
  
			get: function () {
  
				return this._x;
  
			},
  
			set: function ( value ) {
  
				this._x = value;
				this.onChangeCallback();
  
			}
  
		},
  
		y: {
  
			get: function () {
  
				return this._y;
  
			},
  
			set: function ( value ) {
  
				this._y = value;
				this.onChangeCallback();
  
			}
  
		},
  
		z: {
  
			get: function () {
  
				return this._z;
  
			},
  
			set: function ( value ) {
  
				this._z = value;
				this.onChangeCallback();
  
			}
  
		},
  
		w: {
  
			get: function () {
  
				return this._w;
  
			},
  
			set: function ( value ) {
  
				this._w = value;
				this.onChangeCallback();
  
			}
  
		}
  
	} );
  
	Object.assign( Quaternion.prototype, {
  
		set: function ( x, y, z, w ) {
  
			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor( this._x, this._y, this._z, this._w );
  
		},
  
		copy: function ( quaternion ) {
  
			this._x = quaternion.x;
			this._y = quaternion.y;
			this._z = quaternion.z;
			this._w = quaternion.w;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		setFromEuler: function ( euler, update ) {
  
			if ( ! ( euler && euler.isEuler ) ) {
  
				throw new Error( 'THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.' );
  
			}
  
			var x = euler._x, y = euler._y, z = euler._z, order = euler.order;
  
			// http://www.mathworks.com/matlabcentral/fileexchange/
			// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
			//	content/SpinCalc.m
  
			var cos = Math.cos;
			var sin = Math.sin;
  
			var c1 = cos( x / 2 );
			var c2 = cos( y / 2 );
			var c3 = cos( z / 2 );
  
			var s1 = sin( x / 2 );
			var s2 = sin( y / 2 );
			var s3 = sin( z / 2 );
  
			if ( order === 'XYZ' ) {
  
				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;
  
			} else if ( order === 'YXZ' ) {
  
				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;
  
			} else if ( order === 'ZXY' ) {
  
				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;
  
			} else if ( order === 'ZYX' ) {
  
				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;
  
			} else if ( order === 'YZX' ) {
  
				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;
  
			} else if ( order === 'XZY' ) {
  
				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;
  
			}
  
			if ( update !== false ) this.onChangeCallback();
  
			return this;
  
		},
  
		setFromAxisAngle: function ( axis, angle ) {
  
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm
  
			// assumes axis is normalized
  
			var halfAngle = angle / 2, s = Math.sin( halfAngle );
  
			this._x = axis.x * s;
			this._y = axis.y * s;
			this._z = axis.z * s;
			this._w = Math.cos( halfAngle );
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		setFromRotationMatrix: function ( m ) {
  
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
  
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
  
			var te = m.elements,
  
				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],
  
				trace = m11 + m22 + m33,
				s;
  
			if ( trace > 0 ) {
  
				s = 0.5 / Math.sqrt( trace + 1.0 );
  
				this._w = 0.25 / s;
				this._x = ( m32 - m23 ) * s;
				this._y = ( m13 - m31 ) * s;
				this._z = ( m21 - m12 ) * s;
  
			} else if ( m11 > m22 && m11 > m33 ) {
  
				s = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );
  
				this._w = ( m32 - m23 ) / s;
				this._x = 0.25 * s;
				this._y = ( m12 + m21 ) / s;
				this._z = ( m13 + m31 ) / s;
  
			} else if ( m22 > m33 ) {
  
				s = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );
  
				this._w = ( m13 - m31 ) / s;
				this._x = ( m12 + m21 ) / s;
				this._y = 0.25 * s;
				this._z = ( m23 + m32 ) / s;
  
			} else {
  
				s = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );
  
				this._w = ( m21 - m12 ) / s;
				this._x = ( m13 + m31 ) / s;
				this._y = ( m23 + m32 ) / s;
				this._z = 0.25 * s;
  
			}
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		setFromUnitVectors: function () {
  
			// assumes direction vectors vFrom and vTo are normalized
  
			var v1 = new Vector3();
			var r;
  
			var EPS = 0.000001;
  
			return function setFromUnitVectors( vFrom, vTo ) {
  
				if ( v1 === undefined ) v1 = new Vector3();
  
				r = vFrom.dot( vTo ) + 1;
  
				if ( r < EPS ) {
  
					r = 0;
  
					if ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {
  
						v1.set( - vFrom.y, vFrom.x, 0 );
  
					} else {
  
						v1.set( 0, - vFrom.z, vFrom.y );
  
					}
  
				} else {
  
					v1.crossVectors( vFrom, vTo );
  
				}
  
				this._x = v1.x;
				this._y = v1.y;
				this._z = v1.z;
				this._w = r;
  
				return this.normalize();
  
			};
  
		}(),
  
		inverse: function () {
  
			// quaternion is assumed to have unit length
  
			return this.conjugate();
  
		},
  
		conjugate: function () {
  
			this._x *= - 1;
			this._y *= - 1;
			this._z *= - 1;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		dot: function ( v ) {
  
			return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;
  
		},
  
		lengthSq: function () {
  
			return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;
  
		},
  
		length: function () {
  
			return Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );
  
		},
  
		normalize: function () {
  
			var l = this.length();
  
			if ( l === 0 ) {
  
				this._x = 0;
				this._y = 0;
				this._z = 0;
				this._w = 1;
  
			} else {
  
				l = 1 / l;
  
				this._x = this._x * l;
				this._y = this._y * l;
				this._z = this._z * l;
				this._w = this._w * l;
  
			}
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		multiply: function ( q, p ) {
  
			if ( p !== undefined ) {
  
				console.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );
				return this.multiplyQuaternions( q, p );
  
			}
  
			return this.multiplyQuaternions( this, q );
  
		},
  
		premultiply: function ( q ) {
  
			return this.multiplyQuaternions( q, this );
  
		},
  
		multiplyQuaternions: function ( a, b ) {
  
			// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm
  
			var qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
			var qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;
  
			this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
			this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
			this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
			this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		slerp: function ( qb, t ) {
  
			if ( t === 0 ) return this;
			if ( t === 1 ) return this.copy( qb );
  
			var x = this._x, y = this._y, z = this._z, w = this._w;
  
			// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/
  
			var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;
  
			if ( cosHalfTheta < 0 ) {
  
				this._w = - qb._w;
				this._x = - qb._x;
				this._y = - qb._y;
				this._z = - qb._z;
  
				cosHalfTheta = - cosHalfTheta;
  
			} else {
  
				this.copy( qb );
  
			}
  
			if ( cosHalfTheta >= 1.0 ) {
  
				this._w = w;
				this._x = x;
				this._y = y;
				this._z = z;
  
				return this;
  
			}
  
			var sinHalfTheta = Math.sqrt( 1.0 - cosHalfTheta * cosHalfTheta );
  
			if ( Math.abs( sinHalfTheta ) < 0.001 ) {
  
				this._w = 0.5 * ( w + this._w );
				this._x = 0.5 * ( x + this._x );
				this._y = 0.5 * ( y + this._y );
				this._z = 0.5 * ( z + this._z );
  
				return this;
  
			}
  
			var halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );
			var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,
				ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;
  
			this._w = ( w * ratioA + this._w * ratioB );
			this._x = ( x * ratioA + this._x * ratioB );
			this._y = ( y * ratioA + this._y * ratioB );
			this._z = ( z * ratioA + this._z * ratioB );
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		equals: function ( quaternion ) {
  
			return ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this._x = array[ offset ];
			this._y = array[ offset + 1 ];
			this._z = array[ offset + 2 ];
			this._w = array[ offset + 3 ];
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._w;
  
			return array;
  
		},
  
		onChange: function ( callback ) {
  
			this.onChangeCallback = callback;
  
			return this;
  
		},
  
		onChangeCallback: function () {}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author kile / http://kile.stravaganza.org/
	 * @author philogb / http://blog.thejit.org/
	 * @author mikael emtinger / http://gomo.se/
	 * @author egraether / http://egraether.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function Vector3( x, y, z ) {
  
		this.x = x || 0;
		this.y = y || 0;
		this.z = z || 0;
  
	}
  
	Object.assign( Vector3.prototype, {
  
		isVector3: true,
  
		set: function ( x, y, z ) {
  
			this.x = x;
			this.y = y;
			this.z = z;
  
			return this;
  
		},
  
		setScalar: function ( scalar ) {
  
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
  
			return this;
  
		},
  
		setX: function ( x ) {
  
			this.x = x;
  
			return this;
  
		},
  
		setY: function ( y ) {
  
			this.y = y;
  
			return this;
  
		},
  
		setZ: function ( z ) {
  
			this.z = z;
  
			return this;
  
		},
  
		setComponent: function ( index, value ) {
  
			switch ( index ) {
  
				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
			return this;
  
		},
  
		getComponent: function ( index ) {
  
			switch ( index ) {
  
				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
		},
  
		clone: function () {
  
			return new this.constructor( this.x, this.y, this.z );
  
		},
  
		copy: function ( v ) {
  
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
  
			return this;
  
		},
  
		add: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );
  
			}
  
			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
  
			return this;
  
		},
  
		addScalar: function ( s ) {
  
			this.x += s;
			this.y += s;
			this.z += s;
  
			return this;
  
		},
  
		addVectors: function ( a, b ) {
  
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
  
			return this;
  
		},
  
		addScaledVector: function ( v, s ) {
  
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
  
			return this;
  
		},
  
		sub: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );
  
			}
  
			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
  
			return this;
  
		},
  
		subScalar: function ( s ) {
  
			this.x -= s;
			this.y -= s;
			this.z -= s;
  
			return this;
  
		},
  
		subVectors: function ( a, b ) {
  
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
  
			return this;
  
		},
  
		multiply: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );
				return this.multiplyVectors( v, w );
  
			}
  
			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;
  
			return this;
  
		},
  
		multiplyScalar: function ( scalar ) {
  
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
  
			return this;
  
		},
  
		multiplyVectors: function ( a, b ) {
  
			this.x = a.x * b.x;
			this.y = a.y * b.y;
			this.z = a.z * b.z;
  
			return this;
  
		},
  
		applyEuler: function () {
  
			var quaternion = new Quaternion();
  
			return function applyEuler( euler ) {
  
				if ( ! ( euler && euler.isEuler ) ) {
  
					console.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );
  
				}
  
				return this.applyQuaternion( quaternion.setFromEuler( euler ) );
  
			};
  
		}(),
  
		applyAxisAngle: function () {
  
			var quaternion = new Quaternion();
  
			return function applyAxisAngle( axis, angle ) {
  
				return this.applyQuaternion( quaternion.setFromAxisAngle( axis, angle ) );
  
			};
  
		}(),
  
		applyMatrix3: function ( m ) {
  
			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;
  
			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;
			this.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;
  
			return this;
  
		},
  
		applyMatrix4: function ( m ) {
  
			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;
  
			var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );
  
			this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;
			this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;
			this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;
  
			return this;
  
		},
  
		applyQuaternion: function ( q ) {
  
			var x = this.x, y = this.y, z = this.z;
			var qx = q.x, qy = q.y, qz = q.z, qw = q.w;
  
			// calculate quat * vector
  
			var ix = qw * x + qy * z - qz * y;
			var iy = qw * y + qz * x - qx * z;
			var iz = qw * z + qx * y - qy * x;
			var iw = - qx * x - qy * y - qz * z;
  
			// calculate result * inverse quat
  
			this.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;
			this.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;
			this.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;
  
			return this;
  
		},
  
		project: function () {
  
			var matrix = new Matrix4();
  
			return function project( camera ) {
  
				matrix.multiplyMatrices( camera.projectionMatrix, matrix.getInverse( camera.matrixWorld ) );
				return this.applyMatrix4( matrix );
  
			};
  
		}(),
  
		unproject: function () {
  
			var matrix = new Matrix4();
  
			return function unproject( camera ) {
  
				matrix.multiplyMatrices( camera.matrixWorld, matrix.getInverse( camera.projectionMatrix ) );
				return this.applyMatrix4( matrix );
  
			};
  
		}(),
  
		transformDirection: function ( m ) {
  
			// input: THREE.Matrix4 affine matrix
			// vector interpreted as a direction
  
			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;
  
			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;
  
			return this.normalize();
  
		},
  
		divide: function ( v ) {
  
			this.x /= v.x;
			this.y /= v.y;
			this.z /= v.z;
  
			return this;
  
		},
  
		divideScalar: function ( scalar ) {
  
			return this.multiplyScalar( 1 / scalar );
  
		},
  
		min: function ( v ) {
  
			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );
  
			return this;
  
		},
  
		max: function ( v ) {
  
			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );
  
			return this;
  
		},
  
		clamp: function ( min, max ) {
  
			// assumes min < max, componentwise
  
			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );
  
			return this;
  
		},
  
		clampScalar: function () {
  
			var min = new Vector3();
			var max = new Vector3();
  
			return function clampScalar( minVal, maxVal ) {
  
				min.set( minVal, minVal, minVal );
				max.set( maxVal, maxVal, maxVal );
  
				return this.clamp( min, max );
  
			};
  
		}(),
  
		clampLength: function ( min, max ) {
  
			var length = this.length();
  
			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );
  
		},
  
		floor: function () {
  
			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );
  
			return this;
  
		},
  
		ceil: function () {
  
			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );
  
			return this;
  
		},
  
		round: function () {
  
			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );
  
			return this;
  
		},
  
		roundToZero: function () {
  
			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );
  
			return this;
  
		},
  
		negate: function () {
  
			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;
  
			return this;
  
		},
  
		dot: function ( v ) {
  
			return this.x * v.x + this.y * v.y + this.z * v.z;
  
		},
  
		// TODO lengthSquared?
  
		lengthSq: function () {
  
			return this.x * this.x + this.y * this.y + this.z * this.z;
  
		},
  
		length: function () {
  
			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );
  
		},
  
		manhattanLength: function () {
  
			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );
  
		},
  
		normalize: function () {
  
			return this.divideScalar( this.length() || 1 );
  
		},
  
		setLength: function ( length ) {
  
			return this.normalize().multiplyScalar( length );
  
		},
  
		lerp: function ( v, alpha ) {
  
			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;
  
			return this;
  
		},
  
		lerpVectors: function ( v1, v2, alpha ) {
  
			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );
  
		},
  
		cross: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );
				return this.crossVectors( v, w );
  
			}
  
			return this.crossVectors( this, v );
  
		},
  
		crossVectors: function ( a, b ) {
  
			var ax = a.x, ay = a.y, az = a.z;
			var bx = b.x, by = b.y, bz = b.z;
  
			this.x = ay * bz - az * by;
			this.y = az * bx - ax * bz;
			this.z = ax * by - ay * bx;
  
			return this;
  
		},
  
		projectOnVector: function ( vector ) {
  
			var scalar = vector.dot( this ) / vector.lengthSq();
  
			return this.copy( vector ).multiplyScalar( scalar );
  
		},
  
		projectOnPlane: function () {
  
			var v1 = new Vector3();
  
			return function projectOnPlane( planeNormal ) {
  
				v1.copy( this ).projectOnVector( planeNormal );
  
				return this.sub( v1 );
  
			};
  
		}(),
  
		reflect: function () {
  
			// reflect incident vector off plane orthogonal to normal
			// normal is assumed to have unit length
  
			var v1 = new Vector3();
  
			return function reflect( normal ) {
  
				return this.sub( v1.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );
  
			};
  
		}(),
  
		angleTo: function ( v ) {
  
			var theta = this.dot( v ) / ( Math.sqrt( this.lengthSq() * v.lengthSq() ) );
  
			// clamp, to handle numerical problems
  
			return Math.acos( _Math.clamp( theta, - 1, 1 ) );
  
		},
  
		distanceTo: function ( v ) {
  
			return Math.sqrt( this.distanceToSquared( v ) );
  
		},
  
		distanceToSquared: function ( v ) {
  
			var dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;
  
			return dx * dx + dy * dy + dz * dz;
  
		},
  
		manhattanDistanceTo: function ( v ) {
  
			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );
  
		},
  
		setFromSpherical: function ( s ) {
  
			var sinPhiRadius = Math.sin( s.phi ) * s.radius;
  
			this.x = sinPhiRadius * Math.sin( s.theta );
			this.y = Math.cos( s.phi ) * s.radius;
			this.z = sinPhiRadius * Math.cos( s.theta );
  
			return this;
  
		},
  
		setFromCylindrical: function ( c ) {
  
			this.x = c.radius * Math.sin( c.theta );
			this.y = c.y;
			this.z = c.radius * Math.cos( c.theta );
  
			return this;
  
		},
  
		setFromMatrixPosition: function ( m ) {
  
			var e = m.elements;
  
			this.x = e[ 12 ];
			this.y = e[ 13 ];
			this.z = e[ 14 ];
  
			return this;
  
		},
  
		setFromMatrixScale: function ( m ) {
  
			var sx = this.setFromMatrixColumn( m, 0 ).length();
			var sy = this.setFromMatrixColumn( m, 1 ).length();
			var sz = this.setFromMatrixColumn( m, 2 ).length();
  
			this.x = sx;
			this.y = sy;
			this.z = sz;
  
			return this;
  
		},
  
		setFromMatrixColumn: function ( m, index ) {
  
			return this.fromArray( m.elements, index * 4 );
  
		},
  
		equals: function ( v ) {
  
			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;
  
			return array;
  
		},
  
		fromBufferAttribute: function ( attribute, index, offset ) {
  
			if ( offset !== undefined ) {
  
				console.warn( 'THREE.Vector3: offset has been removed from .fromBufferAttribute().' );
  
			}
  
			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 * @author tschw
	 */
  
	function Matrix3() {
  
		this.elements = [
  
			1, 0, 0,
			0, 1, 0,
			0, 0, 1
  
		];
  
		if ( arguments.length > 0 ) {
  
			console.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );
  
		}
  
	}
  
	Object.assign( Matrix3.prototype, {
  
		isMatrix3: true,
  
		set: function ( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {
  
			var te = this.elements;
  
			te[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;
			te[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;
			te[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;
  
			return this;
  
		},
  
		identity: function () {
  
			this.set(
  
				1, 0, 0,
				0, 1, 0,
				0, 0, 1
  
			);
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().fromArray( this.elements );
  
		},
  
		copy: function ( m ) {
  
			var te = this.elements;
			var me = m.elements;
  
			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ];
			te[ 3 ] = me[ 3 ]; te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ];
			te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ]; te[ 8 ] = me[ 8 ];
  
			return this;
  
		},
  
		setFromMatrix4: function ( m ) {
  
			var me = m.elements;
  
			this.set(
  
				me[ 0 ], me[ 4 ], me[ 8 ],
				me[ 1 ], me[ 5 ], me[ 9 ],
				me[ 2 ], me[ 6 ], me[ 10 ]
  
			);
  
			return this;
  
		},
  
		applyToBufferAttribute: function () {
  
			var v1 = new Vector3();
  
			return function applyToBufferAttribute( attribute ) {
  
				for ( var i = 0, l = attribute.count; i < l; i ++ ) {
  
					v1.x = attribute.getX( i );
					v1.y = attribute.getY( i );
					v1.z = attribute.getZ( i );
  
					v1.applyMatrix3( this );
  
					attribute.setXYZ( i, v1.x, v1.y, v1.z );
  
				}
  
				return attribute;
  
			};
  
		}(),
  
		multiply: function ( m ) {
  
			return this.multiplyMatrices( this, m );
  
		},
  
		premultiply: function ( m ) {
  
			return this.multiplyMatrices( m, this );
  
		},
  
		multiplyMatrices: function ( a, b ) {
  
			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;
  
			var a11 = ae[ 0 ], a12 = ae[ 3 ], a13 = ae[ 6 ];
			var a21 = ae[ 1 ], a22 = ae[ 4 ], a23 = ae[ 7 ];
			var a31 = ae[ 2 ], a32 = ae[ 5 ], a33 = ae[ 8 ];
  
			var b11 = be[ 0 ], b12 = be[ 3 ], b13 = be[ 6 ];
			var b21 = be[ 1 ], b22 = be[ 4 ], b23 = be[ 7 ];
			var b31 = be[ 2 ], b32 = be[ 5 ], b33 = be[ 8 ];
  
			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31;
			te[ 3 ] = a11 * b12 + a12 * b22 + a13 * b32;
			te[ 6 ] = a11 * b13 + a12 * b23 + a13 * b33;
  
			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31;
			te[ 4 ] = a21 * b12 + a22 * b22 + a23 * b32;
			te[ 7 ] = a21 * b13 + a22 * b23 + a23 * b33;
  
			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31;
			te[ 5 ] = a31 * b12 + a32 * b22 + a33 * b32;
			te[ 8 ] = a31 * b13 + a32 * b23 + a33 * b33;
  
			return this;
  
		},
  
		multiplyScalar: function ( s ) {
  
			var te = this.elements;
  
			te[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;
			te[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;
			te[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;
  
			return this;
  
		},
  
		determinant: function () {
  
			var te = this.elements;
  
			var a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],
				d = te[ 3 ], e = te[ 4 ], f = te[ 5 ],
				g = te[ 6 ], h = te[ 7 ], i = te[ 8 ];
  
			return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;
  
		},
  
		getInverse: function ( matrix, throwOnDegenerate ) {
  
			if ( matrix && matrix.isMatrix4 ) {
  
				console.error( "THREE.Matrix3: .getInverse() no longer takes a Matrix4 argument." );
  
			}
  
			var me = matrix.elements,
				te = this.elements,
  
				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ],
				n12 = me[ 3 ], n22 = me[ 4 ], n32 = me[ 5 ],
				n13 = me[ 6 ], n23 = me[ 7 ], n33 = me[ 8 ],
  
				t11 = n33 * n22 - n32 * n23,
				t12 = n32 * n13 - n33 * n12,
				t13 = n23 * n12 - n22 * n13,
  
				det = n11 * t11 + n21 * t12 + n31 * t13;
  
			if ( det === 0 ) {
  
				var msg = "THREE.Matrix3: .getInverse() can't invert matrix, determinant is 0";
  
				if ( throwOnDegenerate === true ) {
  
					throw new Error( msg );
  
				} else {
  
					console.warn( msg );
  
				}
  
				return this.identity();
  
			}
  
			var detInv = 1 / det;
  
			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;
			te[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;
  
			te[ 3 ] = t12 * detInv;
			te[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;
			te[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;
  
			te[ 6 ] = t13 * detInv;
			te[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;
			te[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;
  
			return this;
  
		},
  
		transpose: function () {
  
			var tmp, m = this.elements;
  
			tmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;
			tmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;
			tmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;
  
			return this;
  
		},
  
		getNormalMatrix: function ( matrix4 ) {
  
			return this.setFromMatrix4( matrix4 ).getInverse( this ).transpose();
  
		},
  
		transposeIntoArray: function ( r ) {
  
			var m = this.elements;
  
			r[ 0 ] = m[ 0 ];
			r[ 1 ] = m[ 3 ];
			r[ 2 ] = m[ 6 ];
			r[ 3 ] = m[ 1 ];
			r[ 4 ] = m[ 4 ];
			r[ 5 ] = m[ 7 ];
			r[ 6 ] = m[ 2 ];
			r[ 7 ] = m[ 5 ];
			r[ 8 ] = m[ 8 ];
  
			return this;
  
		},
  
		setUvTransform: function ( tx, ty, sx, sy, rotation, cx, cy ) {
  
			var c = Math.cos( rotation );
			var s = Math.sin( rotation );
  
			this.set(
				sx * c, sx * s, - sx * ( c * cx + s * cy ) + cx + tx,
				- sy * s, sy * c, - sy * ( - s * cx + c * cy ) + cy + ty,
				0, 0, 1
			);
  
		},
  
		scale: function ( sx, sy ) {
  
			var te = this.elements;
  
			te[ 0 ] *= sx; te[ 3 ] *= sx; te[ 6 ] *= sx;
			te[ 1 ] *= sy; te[ 4 ] *= sy; te[ 7 ] *= sy;
  
			return this;
  
		},
  
		rotate: function ( theta ) {
  
			var c = Math.cos( theta );
			var s = Math.sin( theta );
  
			var te = this.elements;
  
			var a11 = te[ 0 ], a12 = te[ 3 ], a13 = te[ 6 ];
			var a21 = te[ 1 ], a22 = te[ 4 ], a23 = te[ 7 ];
  
			te[ 0 ] = c * a11 + s * a21;
			te[ 3 ] = c * a12 + s * a22;
			te[ 6 ] = c * a13 + s * a23;
  
			te[ 1 ] = - s * a11 + c * a21;
			te[ 4 ] = - s * a12 + c * a22;
			te[ 7 ] = - s * a13 + c * a23;
  
			return this;
  
		},
  
		translate: function ( tx, ty ) {
  
			var te = this.elements;
  
			te[ 0 ] += tx * te[ 2 ]; te[ 3 ] += tx * te[ 5 ]; te[ 6 ] += tx * te[ 8 ];
			te[ 1 ] += ty * te[ 2 ]; te[ 4 ] += ty * te[ 5 ]; te[ 7 ] += ty * te[ 8 ];
  
			return this;
  
		},
  
		equals: function ( matrix ) {
  
			var te = this.elements;
			var me = matrix.elements;
  
			for ( var i = 0; i < 9; i ++ ) {
  
				if ( te[ i ] !== me[ i ] ) return false;
  
			}
  
			return true;
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			for ( var i = 0; i < 9; i ++ ) {
  
				this.elements[ i ] = array[ i + offset ];
  
			}
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			var te = this.elements;
  
			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];
  
			array[ offset + 3 ] = te[ 3 ];
			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];
  
			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];
			array[ offset + 8 ] = te[ 8 ];
  
			return array;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author szimek / https://github.com/szimek/
	 */
  
	var textureId = 0;
  
	function Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {
  
		Object.defineProperty( this, 'id', { value: textureId ++ } );
  
		this.uuid = _Math.generateUUID();
  
		this.name = '';
  
		this.image = image !== undefined ? image : Texture.DEFAULT_IMAGE;
		this.mipmaps = [];
  
		this.mapping = mapping !== undefined ? mapping : Texture.DEFAULT_MAPPING;
  
		this.wrapS = wrapS !== undefined ? wrapS : ClampToEdgeWrapping;
		this.wrapT = wrapT !== undefined ? wrapT : ClampToEdgeWrapping;
  
		this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
		this.minFilter = minFilter !== undefined ? minFilter : LinearMipMapLinearFilter;
  
		this.anisotropy = anisotropy !== undefined ? anisotropy : 1;
  
		this.format = format !== undefined ? format : RGBAFormat;
		this.type = type !== undefined ? type : UnsignedByteType;
  
		this.offset = new Vector2( 0, 0 );
		this.repeat = new Vector2( 1, 1 );
		this.center = new Vector2( 0, 0 );
		this.rotation = 0;
  
		this.matrixAutoUpdate = true;
		this.matrix = new Matrix3();
  
		this.generateMipmaps = true;
		this.premultiplyAlpha = false;
		this.flipY = true;
		this.unpackAlignment = 4;	// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)
  
		// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
		//
		// Also changing the encoding after already used by a Material will not automatically make the Material
		// update.  You need to explicitly call Material.needsUpdate to trigger it to recompile.
		this.encoding = encoding !== undefined ? encoding : LinearEncoding;
  
		this.version = 0;
		this.onUpdate = null;
  
	}
  
	Texture.DEFAULT_IMAGE = undefined;
	Texture.DEFAULT_MAPPING = UVMapping;
  
	Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: Texture,
  
		isTexture: true,
  
		updateMatrix: function () {
  
			this.matrix.setUvTransform( this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y );
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( source ) {
  
			this.name = source.name;
  
			this.image = source.image;
			this.mipmaps = source.mipmaps.slice( 0 );
  
			this.mapping = source.mapping;
  
			this.wrapS = source.wrapS;
			this.wrapT = source.wrapT;
  
			this.magFilter = source.magFilter;
			this.minFilter = source.minFilter;
  
			this.anisotropy = source.anisotropy;
  
			this.format = source.format;
			this.type = source.type;
  
			this.offset.copy( source.offset );
			this.repeat.copy( source.repeat );
			this.center.copy( source.center );
			this.rotation = source.rotation;
  
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrix.copy( source.matrix );
  
			this.generateMipmaps = source.generateMipmaps;
			this.premultiplyAlpha = source.premultiplyAlpha;
			this.flipY = source.flipY;
			this.unpackAlignment = source.unpackAlignment;
			this.encoding = source.encoding;
  
			return this;
  
		},
  
		toJSON: function ( meta ) {
  
			var isRootObject = ( meta === undefined || typeof meta === 'string' );
  
			if ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {
  
				return meta.textures[ this.uuid ];
  
			}
  
			function getDataURL( image ) {
  
				var canvas;
  
				if ( image instanceof HTMLCanvasElement ) {
  
					canvas = image;
  
				} else {
  
					canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
					canvas.width = image.width;
					canvas.height = image.height;
  
					var context = canvas.getContext( '2d' );
  
					if ( image instanceof ImageData ) {
  
						context.putImageData( image, 0, 0 );
  
					} else {
  
						context.drawImage( image, 0, 0, image.width, image.height );
  
					}
  
				}
  
				if ( canvas.width > 2048 || canvas.height > 2048 ) {
  
					return canvas.toDataURL( 'image/jpeg', 0.6 );
  
				} else {
  
					return canvas.toDataURL( 'image/png' );
  
				}
  
			}
  
			var output = {
  
				metadata: {
					version: 4.5,
					type: 'Texture',
					generator: 'Texture.toJSON'
				},
  
				uuid: this.uuid,
				name: this.name,
  
				mapping: this.mapping,
  
				repeat: [ this.repeat.x, this.repeat.y ],
				offset: [ this.offset.x, this.offset.y ],
				center: [ this.center.x, this.center.y ],
				rotation: this.rotation,
  
				wrap: [ this.wrapS, this.wrapT ],
  
				format: this.format,
				minFilter: this.minFilter,
				magFilter: this.magFilter,
				anisotropy: this.anisotropy,
  
				flipY: this.flipY
  
			};
  
			if ( this.image !== undefined ) {
  
				// TODO: Move to THREE.Image
  
				var image = this.image;
  
				if ( image.uuid === undefined ) {
  
					image.uuid = _Math.generateUUID(); // UGH
  
				}
  
				if ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {
  
					meta.images[ image.uuid ] = {
						uuid: image.uuid,
						url: getDataURL( image )
					};
  
				}
  
				output.image = image.uuid;
  
			}
  
			if ( ! isRootObject ) {
  
				meta.textures[ this.uuid ] = output;
  
			}
  
			return output;
  
		},
  
		dispose: function () {
  
			this.dispatchEvent( { type: 'dispose' } );
  
		},
  
		transformUv: function ( uv ) {
  
			if ( this.mapping !== UVMapping ) return;
  
			uv.applyMatrix3( this.matrix );
  
			if ( uv.x < 0 || uv.x > 1 ) {
  
				switch ( this.wrapS ) {
  
					case RepeatWrapping:
  
						uv.x = uv.x - Math.floor( uv.x );
						break;
  
					case ClampToEdgeWrapping:
  
						uv.x = uv.x < 0 ? 0 : 1;
						break;
  
					case MirroredRepeatWrapping:
  
						if ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {
  
							uv.x = Math.ceil( uv.x ) - uv.x;
  
						} else {
  
							uv.x = uv.x - Math.floor( uv.x );
  
						}
						break;
  
				}
  
			}
  
			if ( uv.y < 0 || uv.y > 1 ) {
  
				switch ( this.wrapT ) {
  
					case RepeatWrapping:
  
						uv.y = uv.y - Math.floor( uv.y );
						break;
  
					case ClampToEdgeWrapping:
  
						uv.y = uv.y < 0 ? 0 : 1;
						break;
  
					case MirroredRepeatWrapping:
  
						if ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {
  
							uv.y = Math.ceil( uv.y ) - uv.y;
  
						} else {
  
							uv.y = uv.y - Math.floor( uv.y );
  
						}
						break;
  
				}
  
			}
  
			if ( this.flipY ) {
  
				uv.y = 1 - uv.y;
  
			}
  
		}
  
	} );
  
	Object.defineProperty( Texture.prototype, "needsUpdate", {
  
		set: function ( value ) {
  
			if ( value === true ) this.version ++;
  
		}
  
	} );
  
	/**
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author philogb / http://blog.thejit.org/
	 * @author mikael emtinger / http://gomo.se/
	 * @author egraether / http://egraether.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function Vector4( x, y, z, w ) {
  
		this.x = x || 0;
		this.y = y || 0;
		this.z = z || 0;
		this.w = ( w !== undefined ) ? w : 1;
  
	}
  
	Object.assign( Vector4.prototype, {
  
		isVector4: true,
  
		set: function ( x, y, z, w ) {
  
			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;
  
			return this;
  
		},
  
		setScalar: function ( scalar ) {
  
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			this.w = scalar;
  
			return this;
  
		},
  
		setX: function ( x ) {
  
			this.x = x;
  
			return this;
  
		},
  
		setY: function ( y ) {
  
			this.y = y;
  
			return this;
  
		},
  
		setZ: function ( z ) {
  
			this.z = z;
  
			return this;
  
		},
  
		setW: function ( w ) {
  
			this.w = w;
  
			return this;
  
		},
  
		setComponent: function ( index, value ) {
  
			switch ( index ) {
  
				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				case 3: this.w = value; break;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
			return this;
  
		},
  
		getComponent: function ( index ) {
  
			switch ( index ) {
  
				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				case 3: return this.w;
				default: throw new Error( 'index is out of range: ' + index );
  
			}
  
		},
  
		clone: function () {
  
			return new this.constructor( this.x, this.y, this.z, this.w );
  
		},
  
		copy: function ( v ) {
  
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			this.w = ( v.w !== undefined ) ? v.w : 1;
  
			return this;
  
		},
  
		add: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );
  
			}
  
			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			this.w += v.w;
  
			return this;
  
		},
  
		addScalar: function ( s ) {
  
			this.x += s;
			this.y += s;
			this.z += s;
			this.w += s;
  
			return this;
  
		},
  
		addVectors: function ( a, b ) {
  
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			this.w = a.w + b.w;
  
			return this;
  
		},
  
		addScaledVector: function ( v, s ) {
  
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			this.w += v.w * s;
  
			return this;
  
		},
  
		sub: function ( v, w ) {
  
			if ( w !== undefined ) {
  
				console.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );
  
			}
  
			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			this.w -= v.w;
  
			return this;
  
		},
  
		subScalar: function ( s ) {
  
			this.x -= s;
			this.y -= s;
			this.z -= s;
			this.w -= s;
  
			return this;
  
		},
  
		subVectors: function ( a, b ) {
  
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			this.w = a.w - b.w;
  
			return this;
  
		},
  
		multiplyScalar: function ( scalar ) {
  
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			this.w *= scalar;
  
			return this;
  
		},
  
		applyMatrix4: function ( m ) {
  
			var x = this.x, y = this.y, z = this.z, w = this.w;
			var e = m.elements;
  
			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;
			this.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;
  
			return this;
  
		},
  
		divideScalar: function ( scalar ) {
  
			return this.multiplyScalar( 1 / scalar );
  
		},
  
		setAxisAngleFromQuaternion: function ( q ) {
  
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm
  
			// q is assumed to be normalized
  
			this.w = 2 * Math.acos( q.w );
  
			var s = Math.sqrt( 1 - q.w * q.w );
  
			if ( s < 0.0001 ) {
  
				this.x = 1;
				this.y = 0;
				this.z = 0;
  
			} else {
  
				this.x = q.x / s;
				this.y = q.y / s;
				this.z = q.z / s;
  
			}
  
			return this;
  
		},
  
		setAxisAngleFromRotationMatrix: function ( m ) {
  
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm
  
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
  
			var angle, x, y, z,		// variables for result
				epsilon = 0.01,		// margin to allow for rounding errors
				epsilon2 = 0.1,		// margin to distinguish between 0 and 180 degrees
  
				te = m.elements,
  
				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];
  
			if ( ( Math.abs( m12 - m21 ) < epsilon ) &&
				 ( Math.abs( m13 - m31 ) < epsilon ) &&
				 ( Math.abs( m23 - m32 ) < epsilon ) ) {
  
				// singularity found
				// first check for identity matrix which must have +1 for all terms
				// in leading diagonal and zero in other terms
  
				if ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&
					 ( Math.abs( m13 + m31 ) < epsilon2 ) &&
					 ( Math.abs( m23 + m32 ) < epsilon2 ) &&
					 ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {
  
					// this singularity is identity matrix so angle = 0
  
					this.set( 1, 0, 0, 0 );
  
					return this; // zero angle, arbitrary axis
  
				}
  
				// otherwise this singularity is angle = 180
  
				angle = Math.PI;
  
				var xx = ( m11 + 1 ) / 2;
				var yy = ( m22 + 1 ) / 2;
				var zz = ( m33 + 1 ) / 2;
				var xy = ( m12 + m21 ) / 4;
				var xz = ( m13 + m31 ) / 4;
				var yz = ( m23 + m32 ) / 4;
  
				if ( ( xx > yy ) && ( xx > zz ) ) {
  
					// m11 is the largest diagonal term
  
					if ( xx < epsilon ) {
  
						x = 0;
						y = 0.707106781;
						z = 0.707106781;
  
					} else {
  
						x = Math.sqrt( xx );
						y = xy / x;
						z = xz / x;
  
					}
  
				} else if ( yy > zz ) {
  
					// m22 is the largest diagonal term
  
					if ( yy < epsilon ) {
  
						x = 0.707106781;
						y = 0;
						z = 0.707106781;
  
					} else {
  
						y = Math.sqrt( yy );
						x = xy / y;
						z = yz / y;
  
					}
  
				} else {
  
					// m33 is the largest diagonal term so base result on this
  
					if ( zz < epsilon ) {
  
						x = 0.707106781;
						y = 0.707106781;
						z = 0;
  
					} else {
  
						z = Math.sqrt( zz );
						x = xz / z;
						y = yz / z;
  
					}
  
				}
  
				this.set( x, y, z, angle );
  
				return this; // return 180 deg rotation
  
			}
  
			// as we have reached here there are no singularities so we can handle normally
  
			var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +
							   ( m13 - m31 ) * ( m13 - m31 ) +
							   ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize
  
			if ( Math.abs( s ) < 0.001 ) s = 1;
  
			// prevent divide by zero, should not happen if matrix is orthogonal and should be
			// caught by singularity test above, but I've left it in just in case
  
			this.x = ( m32 - m23 ) / s;
			this.y = ( m13 - m31 ) / s;
			this.z = ( m21 - m12 ) / s;
			this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );
  
			return this;
  
		},
  
		min: function ( v ) {
  
			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );
			this.w = Math.min( this.w, v.w );
  
			return this;
  
		},
  
		max: function ( v ) {
  
			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );
			this.w = Math.max( this.w, v.w );
  
			return this;
  
		},
  
		clamp: function ( min, max ) {
  
			// assumes min < max, componentwise
  
			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );
			this.w = Math.max( min.w, Math.min( max.w, this.w ) );
  
			return this;
  
		},
  
		clampScalar: function () {
  
			var min, max;
  
			return function clampScalar( minVal, maxVal ) {
  
				if ( min === undefined ) {
  
					min = new Vector4();
					max = new Vector4();
  
				}
  
				min.set( minVal, minVal, minVal, minVal );
				max.set( maxVal, maxVal, maxVal, maxVal );
  
				return this.clamp( min, max );
  
			};
  
		}(),
  
		clampLength: function ( min, max ) {
  
			var length = this.length();
  
			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );
  
		},
  
		floor: function () {
  
			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );
			this.w = Math.floor( this.w );
  
			return this;
  
		},
  
		ceil: function () {
  
			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );
			this.w = Math.ceil( this.w );
  
			return this;
  
		},
  
		round: function () {
  
			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );
			this.w = Math.round( this.w );
  
			return this;
  
		},
  
		roundToZero: function () {
  
			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );
			this.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );
  
			return this;
  
		},
  
		negate: function () {
  
			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;
			this.w = - this.w;
  
			return this;
  
		},
  
		dot: function ( v ) {
  
			return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
  
		},
  
		lengthSq: function () {
  
			return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;
  
		},
  
		length: function () {
  
			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );
  
		},
  
		manhattanLength: function () {
  
			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );
  
		},
  
		normalize: function () {
  
			return this.divideScalar( this.length() || 1 );
  
		},
  
		setLength: function ( length ) {
  
			return this.normalize().multiplyScalar( length );
  
		},
  
		lerp: function ( v, alpha ) {
  
			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;
			this.w += ( v.w - this.w ) * alpha;
  
			return this;
  
		},
  
		lerpVectors: function ( v1, v2, alpha ) {
  
			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );
  
		},
  
		equals: function ( v ) {
  
			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];
			this.w = array[ offset + 3 ];
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;
			array[ offset + 3 ] = this.w;
  
			return array;
  
		},
  
		fromBufferAttribute: function ( attribute, index, offset ) {
  
			if ( offset !== undefined ) {
  
				console.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' );
  
			}
  
			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );
			this.w = attribute.getW( index );
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author szimek / https://github.com/szimek/
	 * @author alteredq / http://alteredqualia.com/
	 * @author Marius Kintel / https://github.com/kintel
	 */
  
	/*
	 In options, we can specify:
	 * Texture parameters for an auto-generated target texture
	 * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
	*/
	function WebGLRenderTarget( width, height, options ) {
  
		this.width = width;
		this.height = height;
  
		this.scissor = new Vector4( 0, 0, width, height );
		this.scissorTest = false;
  
		this.viewport = new Vector4( 0, 0, width, height );
  
		options = options || {};
  
		if ( options.minFilter === undefined ) options.minFilter = LinearFilter;
  
		this.texture = new Texture( undefined, undefined, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );
  
		this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : true;
  
		this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
		this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;
		this.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;
  
	}
  
	WebGLRenderTarget.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: WebGLRenderTarget,
  
		isWebGLRenderTarget: true,
  
		setSize: function ( width, height ) {
  
			if ( this.width !== width || this.height !== height ) {
  
				this.width = width;
				this.height = height;
  
				this.dispose();
  
			}
  
			this.viewport.set( 0, 0, width, height );
			this.scissor.set( 0, 0, width, height );
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( source ) {
  
			this.width = source.width;
			this.height = source.height;
  
			this.viewport.copy( source.viewport );
  
			this.texture = source.texture.clone();
  
			this.depthBuffer = source.depthBuffer;
			this.stencilBuffer = source.stencilBuffer;
			this.depthTexture = source.depthTexture;
  
			return this;
  
		},
  
		dispose: function () {
  
			this.dispatchEvent( { type: 'dispose' } );
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com
	 */
  
	function WebGLRenderTargetCube( width, height, options ) {
  
		WebGLRenderTarget.call( this, width, height, options );
  
		this.activeCubeFace = 0; // PX 0, NX 1, PY 2, NY 3, PZ 4, NZ 5
		this.activeMipMapLevel = 0;
  
	}
  
	WebGLRenderTargetCube.prototype = Object.create( WebGLRenderTarget.prototype );
	WebGLRenderTargetCube.prototype.constructor = WebGLRenderTargetCube;
  
	WebGLRenderTargetCube.prototype.isWebGLRenderTargetCube = true;
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {
  
		Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );
  
		this.image = { data: data, width: width, height: height };
  
		this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
		this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;
  
		this.generateMipmaps = false;
		this.flipY = false;
		this.unpackAlignment = 1;
  
	}
  
	DataTexture.prototype = Object.create( Texture.prototype );
	DataTexture.prototype.constructor = DataTexture;
  
	DataTexture.prototype.isDataTexture = true;
  
	/**
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function Box3( min, max ) {
  
		this.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );
		this.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );
  
	}
  
	Object.assign( Box3.prototype, {
  
		isBox3: true,
  
		set: function ( min, max ) {
  
			this.min.copy( min );
			this.max.copy( max );
  
			return this;
  
		},
  
		setFromArray: function ( array ) {
  
			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;
  
			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;
  
			for ( var i = 0, l = array.length; i < l; i += 3 ) {
  
				var x = array[ i ];
				var y = array[ i + 1 ];
				var z = array[ i + 2 ];
  
				if ( x < minX ) minX = x;
				if ( y < minY ) minY = y;
				if ( z < minZ ) minZ = z;
  
				if ( x > maxX ) maxX = x;
				if ( y > maxY ) maxY = y;
				if ( z > maxZ ) maxZ = z;
  
			}
  
			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );
  
			return this;
  
		},
  
		setFromBufferAttribute: function ( attribute ) {
  
			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;
  
			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;
  
			for ( var i = 0, l = attribute.count; i < l; i ++ ) {
  
				var x = attribute.getX( i );
				var y = attribute.getY( i );
				var z = attribute.getZ( i );
  
				if ( x < minX ) minX = x;
				if ( y < minY ) minY = y;
				if ( z < minZ ) minZ = z;
  
				if ( x > maxX ) maxX = x;
				if ( y > maxY ) maxY = y;
				if ( z > maxZ ) maxZ = z;
  
			}
  
			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );
  
			return this;
  
		},
  
		setFromPoints: function ( points ) {
  
			this.makeEmpty();
  
			for ( var i = 0, il = points.length; i < il; i ++ ) {
  
				this.expandByPoint( points[ i ] );
  
			}
  
			return this;
  
		},
  
		setFromCenterAndSize: function () {
  
			var v1 = new Vector3();
  
			return function setFromCenterAndSize( center, size ) {
  
				var halfSize = v1.copy( size ).multiplyScalar( 0.5 );
  
				this.min.copy( center ).sub( halfSize );
				this.max.copy( center ).add( halfSize );
  
				return this;
  
			};
  
		}(),
  
		setFromObject: function ( object ) {
  
			this.makeEmpty();
  
			return this.expandByObject( object );
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( box ) {
  
			this.min.copy( box.min );
			this.max.copy( box.max );
  
			return this;
  
		},
  
		makeEmpty: function () {
  
			this.min.x = this.min.y = this.min.z = + Infinity;
			this.max.x = this.max.y = this.max.z = - Infinity;
  
			return this;
  
		},
  
		isEmpty: function () {
  
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
  
			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );
  
		},
  
		getCenter: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box3: .getCenter() target is now required' );
				target = new Vector3();
  
			}
  
			return this.isEmpty() ? target.set( 0, 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );
  
		},
  
		getSize: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box3: .getSize() target is now required' );
				target = new Vector3();
  
			}
  
			return this.isEmpty() ? target.set( 0, 0, 0 ) : target.subVectors( this.max, this.min );
  
		},
  
		expandByPoint: function ( point ) {
  
			this.min.min( point );
			this.max.max( point );
  
			return this;
  
		},
  
		expandByVector: function ( vector ) {
  
			this.min.sub( vector );
			this.max.add( vector );
  
			return this;
  
		},
  
		expandByScalar: function ( scalar ) {
  
			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );
  
			return this;
  
		},
  
		expandByObject: function () {
  
			// Computes the world-axis-aligned bounding box of an object (including its children),
			// accounting for both the object's, and children's, world transforms
  
			var scope, i, l;
  
			var v1 = new Vector3();
  
			function traverse( node ) {
  
				var geometry = node.geometry;
  
				if ( geometry !== undefined ) {
  
					if ( geometry.isGeometry ) {
  
						var vertices = geometry.vertices;
  
						for ( i = 0, l = vertices.length; i < l; i ++ ) {
  
							v1.copy( vertices[ i ] );
							v1.applyMatrix4( node.matrixWorld );
  
							scope.expandByPoint( v1 );
  
						}
  
					} else if ( geometry.isBufferGeometry ) {
  
						var attribute = geometry.attributes.position;
  
						if ( attribute !== undefined ) {
  
							for ( i = 0, l = attribute.count; i < l; i ++ ) {
  
								v1.fromBufferAttribute( attribute, i ).applyMatrix4( node.matrixWorld );
  
								scope.expandByPoint( v1 );
  
							}
  
						}
  
					}
  
				}
  
			}
  
			return function expandByObject( object ) {
  
				scope = this;
  
				object.updateMatrixWorld( true );
  
				object.traverse( traverse );
  
				return this;
  
			};
  
		}(),
  
		containsPoint: function ( point ) {
  
			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ||
				point.z < this.min.z || point.z > this.max.z ? false : true;
  
		},
  
		containsBox: function ( box ) {
  
			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y &&
				this.min.z <= box.min.z && box.max.z <= this.max.z;
  
		},
  
		getParameter: function ( point, target ) {
  
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box3: .getParameter() target is now required' );
				target = new Vector3();
  
			}
  
			return target.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y ),
				( point.z - this.min.z ) / ( this.max.z - this.min.z )
			);
  
		},
  
		intersectsBox: function ( box ) {
  
			// using 6 splitting planes to rule out intersections.
			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ||
				box.max.z < this.min.z || box.min.z > this.max.z ? false : true;
  
		},
  
		intersectsSphere: ( function () {
  
			var closestPoint = new Vector3();
  
			return function intersectsSphere( sphere ) {
  
				// Find the point on the AABB closest to the sphere center.
				this.clampPoint( sphere.center, closestPoint );
  
				// If that point is inside the sphere, the AABB and sphere intersect.
				return closestPoint.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );
  
			};
  
		} )(),
  
		intersectsPlane: function ( plane ) {
  
			// We compute the minimum and maximum dot product values. If those values
			// are on the same side (back or front) of the plane, then there is no intersection.
  
			var min, max;
  
			if ( plane.normal.x > 0 ) {
  
				min = plane.normal.x * this.min.x;
				max = plane.normal.x * this.max.x;
  
			} else {
  
				min = plane.normal.x * this.max.x;
				max = plane.normal.x * this.min.x;
  
			}
  
			if ( plane.normal.y > 0 ) {
  
				min += plane.normal.y * this.min.y;
				max += plane.normal.y * this.max.y;
  
			} else {
  
				min += plane.normal.y * this.max.y;
				max += plane.normal.y * this.min.y;
  
			}
  
			if ( plane.normal.z > 0 ) {
  
				min += plane.normal.z * this.min.z;
				max += plane.normal.z * this.max.z;
  
			} else {
  
				min += plane.normal.z * this.max.z;
				max += plane.normal.z * this.min.z;
  
			}
  
			return ( min <= plane.constant && max >= plane.constant );
  
		},
  
		intersectsTriangle: ( function () {
  
			// triangle centered vertices
			var v0 = new Vector3();
			var v1 = new Vector3();
			var v2 = new Vector3();
  
			// triangle edge vectors
			var f0 = new Vector3();
			var f1 = new Vector3();
			var f2 = new Vector3();
  
			var testAxis = new Vector3();
  
			var center = new Vector3();
			var extents = new Vector3();
  
			var triangleNormal = new Vector3();
  
			function satForAxes( axes ) {
  
				var i, j;
  
				for ( i = 0, j = axes.length - 3; i <= j; i += 3 ) {
  
					testAxis.fromArray( axes, i );
					// project the aabb onto the seperating axis
					var r = extents.x * Math.abs( testAxis.x ) + extents.y * Math.abs( testAxis.y ) + extents.z * Math.abs( testAxis.z );
					// project all 3 vertices of the triangle onto the seperating axis
					var p0 = v0.dot( testAxis );
					var p1 = v1.dot( testAxis );
					var p2 = v2.dot( testAxis );
					// actual test, basically see if either of the most extreme of the triangle points intersects r
					if ( Math.max( - Math.max( p0, p1, p2 ), Math.min( p0, p1, p2 ) ) > r ) {
  
						// points of the projected triangle are outside the projected half-length of the aabb
						// the axis is seperating and we can exit
						return false;
  
					}
  
				}
  
				return true;
  
			}
  
			return function intersectsTriangle( triangle ) {
  
				if ( this.isEmpty() ) {
  
					return false;
  
				}
  
				// compute box center and extents
				this.getCenter( center );
				extents.subVectors( this.max, center );
  
				// translate triangle to aabb origin
				v0.subVectors( triangle.a, center );
				v1.subVectors( triangle.b, center );
				v2.subVectors( triangle.c, center );
  
				// compute edge vectors for triangle
				f0.subVectors( v1, v0 );
				f1.subVectors( v2, v1 );
				f2.subVectors( v0, v2 );
  
				// test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb
				// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation
				// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)
				var axes = [
					0, - f0.z, f0.y, 0, - f1.z, f1.y, 0, - f2.z, f2.y,
					f0.z, 0, - f0.x, f1.z, 0, - f1.x, f2.z, 0, - f2.x,
					- f0.y, f0.x, 0, - f1.y, f1.x, 0, - f2.y, f2.x, 0
				];
				if ( ! satForAxes( axes ) ) {
  
					return false;
  
				}
  
				// test 3 face normals from the aabb
				axes = [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ];
				if ( ! satForAxes( axes ) ) {
  
					return false;
  
				}
  
				// finally testing the face normal of the triangle
				// use already existing triangle edge vectors here
				triangleNormal.crossVectors( f0, f1 );
				axes = [ triangleNormal.x, triangleNormal.y, triangleNormal.z ];
				return satForAxes( axes );
  
			};
  
		} )(),
  
		clampPoint: function ( point, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box3: .clampPoint() target is now required' );
				target = new Vector3();
  
			}
  
			return target.copy( point ).clamp( this.min, this.max );
  
		},
  
		distanceToPoint: function () {
  
			var v1 = new Vector3();
  
			return function distanceToPoint( point ) {
  
				var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
				return clampedPoint.sub( point ).length();
  
			};
  
		}(),
  
		getBoundingSphere: function () {
  
			var v1 = new Vector3();
  
			return function getBoundingSphere( target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Box3: .getBoundingSphere() target is now required' );
					target = new Sphere();
  
				}
  
				this.getCenter( target.center );
  
				target.radius = this.getSize( v1 ).length() * 0.5;
  
				return target;
  
			};
  
		}(),
  
		intersect: function ( box ) {
  
			this.min.max( box.min );
			this.max.min( box.max );
  
			// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.
			if ( this.isEmpty() ) this.makeEmpty();
  
			return this;
  
		},
  
		union: function ( box ) {
  
			this.min.min( box.min );
			this.max.max( box.max );
  
			return this;
  
		},
  
		applyMatrix4: function ( matrix ) {
  
			// transform of empty box is an empty box.
			if ( this.isEmpty( ) ) return this;
  
			var m = matrix.elements;
  
			var xax = m[ 0 ] * this.min.x, xay = m[ 1 ] * this.min.x, xaz = m[ 2 ] * this.min.x;
			var xbx = m[ 0 ] * this.max.x, xby = m[ 1 ] * this.max.x, xbz = m[ 2 ] * this.max.x;
			var yax = m[ 4 ] * this.min.y, yay = m[ 5 ] * this.min.y, yaz = m[ 6 ] * this.min.y;
			var ybx = m[ 4 ] * this.max.y, yby = m[ 5 ] * this.max.y, ybz = m[ 6 ] * this.max.y;
			var zax = m[ 8 ] * this.min.z, zay = m[ 9 ] * this.min.z, zaz = m[ 10 ] * this.min.z;
			var zbx = m[ 8 ] * this.max.z, zby = m[ 9 ] * this.max.z, zbz = m[ 10 ] * this.max.z;
  
			this.min.x = Math.min( xax, xbx ) + Math.min( yax, ybx ) + Math.min( zax, zbx ) + m[ 12 ];
			this.min.y = Math.min( xay, xby ) + Math.min( yay, yby ) + Math.min( zay, zby ) + m[ 13 ];
			this.min.z = Math.min( xaz, xbz ) + Math.min( yaz, ybz ) + Math.min( zaz, zbz ) + m[ 14 ];
			this.max.x = Math.max( xax, xbx ) + Math.max( yax, ybx ) + Math.max( zax, zbx ) + m[ 12 ];
			this.max.y = Math.max( xay, xby ) + Math.max( yay, yby ) + Math.max( zay, zby ) + m[ 13 ];
			this.max.z = Math.max( xaz, xbz ) + Math.max( yaz, ybz ) + Math.max( zaz, zbz ) + m[ 14 ];
  
			return this;
  
		},
  
		translate: function ( offset ) {
  
			this.min.add( offset );
			this.max.add( offset );
  
			return this;
  
		},
  
		equals: function ( box ) {
  
			return box.min.equals( this.min ) && box.max.equals( this.max );
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Sphere( center, radius ) {
  
		this.center = ( center !== undefined ) ? center : new Vector3();
		this.radius = ( radius !== undefined ) ? radius : 0;
  
	}
  
	Object.assign( Sphere.prototype, {
  
		set: function ( center, radius ) {
  
			this.center.copy( center );
			this.radius = radius;
  
			return this;
  
		},
  
		setFromPoints: function () {
  
			var box = new Box3();
  
			return function setFromPoints( points, optionalCenter ) {
  
				var center = this.center;
  
				if ( optionalCenter !== undefined ) {
  
					center.copy( optionalCenter );
  
				} else {
  
					box.setFromPoints( points ).getCenter( center );
  
				}
  
				var maxRadiusSq = 0;
  
				for ( var i = 0, il = points.length; i < il; i ++ ) {
  
					maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );
  
				}
  
				this.radius = Math.sqrt( maxRadiusSq );
  
				return this;
  
			};
  
		}(),
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( sphere ) {
  
			this.center.copy( sphere.center );
			this.radius = sphere.radius;
  
			return this;
  
		},
  
		empty: function () {
  
			return ( this.radius <= 0 );
  
		},
  
		containsPoint: function ( point ) {
  
			return ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );
  
		},
  
		distanceToPoint: function ( point ) {
  
			return ( point.distanceTo( this.center ) - this.radius );
  
		},
  
		intersectsSphere: function ( sphere ) {
  
			var radiusSum = this.radius + sphere.radius;
  
			return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );
  
		},
  
		intersectsBox: function ( box ) {
  
			return box.intersectsSphere( this );
  
		},
  
		intersectsPlane: function ( plane ) {
  
			return Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;
  
		},
  
		clampPoint: function ( point, target ) {
  
			var deltaLengthSq = this.center.distanceToSquared( point );
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Sphere: .clampPoint() target is now required' );
				target = new Vector3();
  
			}
  
			target.copy( point );
  
			if ( deltaLengthSq > ( this.radius * this.radius ) ) {
  
				target.sub( this.center ).normalize();
				target.multiplyScalar( this.radius ).add( this.center );
  
			}
  
			return target;
  
		},
  
		getBoundingBox: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Sphere: .getBoundingBox() target is now required' );
				target = new Box3();
  
			}
  
			target.set( this.center, this.center );
			target.expandByScalar( this.radius );
  
			return target;
  
		},
  
		applyMatrix4: function ( matrix ) {
  
			this.center.applyMatrix4( matrix );
			this.radius = this.radius * matrix.getMaxScaleOnAxis();
  
			return this;
  
		},
  
		translate: function ( offset ) {
  
			this.center.add( offset );
  
			return this;
  
		},
  
		equals: function ( sphere ) {
  
			return sphere.center.equals( this.center ) && ( sphere.radius === this.radius );
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 */
  
	function Plane( normal, constant ) {
  
		// normal is assumed to be normalized
  
		this.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );
		this.constant = ( constant !== undefined ) ? constant : 0;
  
	}
  
	Object.assign( Plane.prototype, {
  
		set: function ( normal, constant ) {
  
			this.normal.copy( normal );
			this.constant = constant;
  
			return this;
  
		},
  
		setComponents: function ( x, y, z, w ) {
  
			this.normal.set( x, y, z );
			this.constant = w;
  
			return this;
  
		},
  
		setFromNormalAndCoplanarPoint: function ( normal, point ) {
  
			this.normal.copy( normal );
			this.constant = - point.dot( this.normal );
  
			return this;
  
		},
  
		setFromCoplanarPoints: function () {
  
			var v1 = new Vector3();
			var v2 = new Vector3();
  
			return function setFromCoplanarPoints( a, b, c ) {
  
				var normal = v1.subVectors( c, b ).cross( v2.subVectors( a, b ) ).normalize();
  
				// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?
  
				this.setFromNormalAndCoplanarPoint( normal, a );
  
				return this;
  
			};
  
		}(),
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( plane ) {
  
			this.normal.copy( plane.normal );
			this.constant = plane.constant;
  
			return this;
  
		},
  
		normalize: function () {
  
			// Note: will lead to a divide by zero if the plane is invalid.
  
			var inverseNormalLength = 1.0 / this.normal.length();
			this.normal.multiplyScalar( inverseNormalLength );
			this.constant *= inverseNormalLength;
  
			return this;
  
		},
  
		negate: function () {
  
			this.constant *= - 1;
			this.normal.negate();
  
			return this;
  
		},
  
		distanceToPoint: function ( point ) {
  
			return this.normal.dot( point ) + this.constant;
  
		},
  
		distanceToSphere: function ( sphere ) {
  
			return this.distanceToPoint( sphere.center ) - sphere.radius;
  
		},
  
		projectPoint: function ( point, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Plane: .projectPoint() target is now required' );
				target = new Vector3();
  
			}
  
			return target.copy( this.normal ).multiplyScalar( - this.distanceToPoint( point ) ).add( point );
  
		},
  
		intersectLine: function () {
  
			var v1 = new Vector3();
  
			return function intersectLine( line, target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Plane: .intersectLine() target is now required' );
					target = new Vector3();
  
				}
  
				var direction = line.delta( v1 );
  
				var denominator = this.normal.dot( direction );
  
				if ( denominator === 0 ) {
  
					// line is coplanar, return origin
					if ( this.distanceToPoint( line.start ) === 0 ) {
  
						return target.copy( line.start );
  
					}
  
					// Unsure if this is the correct method to handle this case.
					return undefined;
  
				}
  
				var t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;
  
				if ( t < 0 || t > 1 ) {
  
					return undefined;
  
				}
  
				return target.copy( direction ).multiplyScalar( t ).add( line.start );
  
			};
  
		}(),
  
		intersectsLine: function ( line ) {
  
			// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.
  
			var startSign = this.distanceToPoint( line.start );
			var endSign = this.distanceToPoint( line.end );
  
			return ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );
  
		},
  
		intersectsBox: function ( box ) {
  
			return box.intersectsPlane( this );
  
		},
  
		intersectsSphere: function ( sphere ) {
  
			return sphere.intersectsPlane( this );
  
		},
  
		coplanarPoint: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Plane: .coplanarPoint() target is now required' );
				target = new Vector3();
  
			}
  
			return target.copy( this.normal ).multiplyScalar( - this.constant );
  
		},
  
		applyMatrix4: function () {
  
			var v1 = new Vector3();
			var m1 = new Matrix3();
  
			return function applyMatrix4( matrix, optionalNormalMatrix ) {
  
				var normalMatrix = optionalNormalMatrix || m1.getNormalMatrix( matrix );
  
				var referencePoint = this.coplanarPoint( v1 ).applyMatrix4( matrix );
  
				var normal = this.normal.applyMatrix3( normalMatrix ).normalize();
  
				this.constant = - referencePoint.dot( normal );
  
				return this;
  
			};
  
		}(),
  
		translate: function ( offset ) {
  
			this.constant -= offset.dot( this.normal );
  
			return this;
  
		},
  
		equals: function ( plane ) {
  
			return plane.normal.equals( this.normal ) && ( plane.constant === this.constant );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author bhouston / http://clara.io
	 */
  
	function Frustum( p0, p1, p2, p3, p4, p5 ) {
  
		this.planes = [
  
			( p0 !== undefined ) ? p0 : new Plane(),
			( p1 !== undefined ) ? p1 : new Plane(),
			( p2 !== undefined ) ? p2 : new Plane(),
			( p3 !== undefined ) ? p3 : new Plane(),
			( p4 !== undefined ) ? p4 : new Plane(),
			( p5 !== undefined ) ? p5 : new Plane()
  
		];
  
	}
  
	Object.assign( Frustum.prototype, {
  
		set: function ( p0, p1, p2, p3, p4, p5 ) {
  
			var planes = this.planes;
  
			planes[ 0 ].copy( p0 );
			planes[ 1 ].copy( p1 );
			planes[ 2 ].copy( p2 );
			planes[ 3 ].copy( p3 );
			planes[ 4 ].copy( p4 );
			planes[ 5 ].copy( p5 );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( frustum ) {
  
			var planes = this.planes;
  
			for ( var i = 0; i < 6; i ++ ) {
  
				planes[ i ].copy( frustum.planes[ i ] );
  
			}
  
			return this;
  
		},
  
		setFromMatrix: function ( m ) {
  
			var planes = this.planes;
			var me = m.elements;
			var me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];
			var me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];
			var me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];
			var me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];
  
			planes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();
			planes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();
			planes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();
			planes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();
			planes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();
			planes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();
  
			return this;
  
		},
  
		intersectsObject: function () {
  
			var sphere = new Sphere();
  
			return function intersectsObject( object ) {
  
				var geometry = object.geometry;
  
				if ( geometry.boundingSphere === null )
					geometry.computeBoundingSphere();
  
				sphere.copy( geometry.boundingSphere )
					.applyMatrix4( object.matrixWorld );
  
				return this.intersectsSphere( sphere );
  
			};
  
		}(),
  
		intersectsSprite: function () {
  
			var sphere = new Sphere();
  
			return function intersectsSprite( sprite ) {
  
				sphere.center.set( 0, 0, 0 );
				sphere.radius = 0.7071067811865476;
				sphere.applyMatrix4( sprite.matrixWorld );
  
				return this.intersectsSphere( sphere );
  
			};
  
		}(),
  
		intersectsSphere: function ( sphere ) {
  
			var planes = this.planes;
			var center = sphere.center;
			var negRadius = - sphere.radius;
  
			for ( var i = 0; i < 6; i ++ ) {
  
				var distance = planes[ i ].distanceToPoint( center );
  
				if ( distance < negRadius ) {
  
					return false;
  
				}
  
			}
  
			return true;
  
		},
  
		intersectsBox: function () {
  
			var p1 = new Vector3(),
				p2 = new Vector3();
  
			return function intersectsBox( box ) {
  
				var planes = this.planes;
  
				for ( var i = 0; i < 6; i ++ ) {
  
					var plane = planes[ i ];
  
					p1.x = plane.normal.x > 0 ? box.min.x : box.max.x;
					p2.x = plane.normal.x > 0 ? box.max.x : box.min.x;
					p1.y = plane.normal.y > 0 ? box.min.y : box.max.y;
					p2.y = plane.normal.y > 0 ? box.max.y : box.min.y;
					p1.z = plane.normal.z > 0 ? box.min.z : box.max.z;
					p2.z = plane.normal.z > 0 ? box.max.z : box.min.z;
  
					var d1 = plane.distanceToPoint( p1 );
					var d2 = plane.distanceToPoint( p2 );
  
					// if both outside plane, no intersection
  
					if ( d1 < 0 && d2 < 0 ) {
  
						return false;
  
					}
  
				}
  
				return true;
  
			};
  
		}(),
  
		containsPoint: function ( point ) {
  
			var planes = this.planes;
  
			for ( var i = 0; i < 6; i ++ ) {
  
				if ( planes[ i ].distanceToPoint( point ) < 0 ) {
  
					return false;
  
				}
  
			}
  
			return true;
  
		}
  
	} );
  
	var alphamap_fragment = "#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif\n";
  
	var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif\n";
  
	var alphatest_fragment = "#ifdef ALPHATEST\n\tif ( diffuseColor.a < ALPHATEST ) discard;\n#endif\n";
  
	var aomap_fragment = "#ifdef USE_AOMAP\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL )\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\n\t#endif\n#endif\n";
  
	var aomap_pars_fragment = "#ifdef USE_AOMAP\n\tuniform sampler2D aoMap;\n\tuniform float aoMapIntensity;\n#endif";
  
	var begin_vertex = "\nvec3 transformed = vec3( position );\n";
  
	var beginnormal_vertex = "\nvec3 objectNormal = vec3( normal );\n";
  
	var bsdfs = "float punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n\tif( decayExponent > 0.0 ) {\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n\t\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n\t\tfloat maxDistanceCutoffFactor = pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n\t\treturn distanceFalloff * maxDistanceCutoffFactor;\n#else\n\t\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\n#endif\n\t}\n\treturn 1.0;\n}\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\n\treturn RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\n\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\n}\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\treturn 1.0 / ( gl * gv );\n}\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\treturn 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n\tfloat a2 = pow2( alpha );\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\n\tfloat alpha = pow2( roughness );\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNL = saturate( dot( geometry.normal, incidentLight.direction ) );\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\tfloat D = D_GGX( alpha, dotNH );\n\treturn F * ( G * D );\n}\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n\tconst float LUT_SIZE  = 64.0;\n\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n\tconst float LUT_BIAS  = 0.5 / LUT_SIZE;\n\tfloat dotNV = saturate( dot( N, V ) );\n\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n\tuv = uv * LUT_SCALE + LUT_BIAS;\n\treturn uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n\tfloat l = length( f );\n\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n\tfloat x = dot( v1, v2 );\n\tfloat y = abs( x );\n\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\n\tfloat v = a / b;\n\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n\treturn cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n\tvec3 lightNormal = cross( v1, v2 );\n\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n\tvec3 T1, T2;\n\tT1 = normalize( V - N * dot( V, N ) );\n\tT2 = - cross( N, T1 );\n\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n\tvec3 coords[ 4 ];\n\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n\tcoords[ 0 ] = normalize( coords[ 0 ] );\n\tcoords[ 1 ] = normalize( coords[ 1 ] );\n\tcoords[ 2 ] = normalize( coords[ 2 ] );\n\tcoords[ 3 ] = normalize( coords[ 3 ] );\n\tvec3 vectorFormFactor = vec3( 0.0 );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n\treturn vec3( result );\n}\nvec3 BRDF_Specular_GGX_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n\tvec4 r = roughness * c0 + c1;\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n\tvec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw;\n\treturn specularColor * AB.x + AB.y;\n}\nfloat G_BlinnPhong_Implicit( ) {\n\treturn 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_BlinnPhong_Implicit( );\n\tfloat D = D_BlinnPhong( shininess, dotNH );\n\treturn F * ( G * D );\n}\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\n\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\n}\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\n\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\n}\n";
  
	var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n\tuniform sampler2D bumpMap;\n\tuniform float bumpScale;\n\tvec2 dHdxy_fwd() {\n\t\tvec2 dSTdx = dFdx( vUv );\n\t\tvec2 dSTdy = dFdy( vUv );\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n\t\treturn vec2( dBx, dBy );\n\t}\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\n\t\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\n\t\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\n\t\tvec3 vN = surf_norm;\n\t\tvec3 R1 = cross( vSigmaY, vN );\n\t\tvec3 R2 = cross( vN, vSigmaX );\n\t\tfloat fDet = dot( vSigmaX, R1 );\n\t\tfDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\n\t}\n#endif\n";
  
	var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvec4 plane;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n\t\tplane = clippingPlanes[ i ];\n\t\tif ( dot( vViewPosition, plane.xyz ) > plane.w ) discard;\n\t}\n\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n\t\tbool clipped = true;\n\t\t#pragma unroll_loop\n\t\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n\t\t\tplane = clippingPlanes[ i ];\n\t\t\tclipped = ( dot( vViewPosition, plane.xyz ) > plane.w ) && clipped;\n\t\t}\n\t\tif ( clipped ) discard;\n\t#endif\n#endif\n";
  
	var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n\t#if ! defined( PHYSICAL ) && ! defined( PHONG )\n\t\tvarying vec3 vViewPosition;\n\t#endif\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif\n";
  
	var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\n\tvarying vec3 vViewPosition;\n#endif\n";
  
	var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n";
  
	var color_fragment = "#ifdef USE_COLOR\n\tdiffuseColor.rgb *= vColor;\n#endif";
  
	var color_pars_fragment = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif\n";
  
	var color_pars_vertex = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif";
  
	var color_vertex = "#ifdef USE_COLOR\n\tvColor.xyz = color.xyz;\n#endif";
  
	var common = "#define PI 3.14159265359\n#define PI2 6.28318530718\n#define PI_HALF 1.5707963267949\n#define RECIPROCAL_PI 0.31830988618\n#define RECIPROCAL_PI2 0.15915494\n#define LOG2 1.442695\n#define EPSILON 1e-6\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#define whiteCompliment(a) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\nhighp float rand( const in vec2 uv ) {\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n\treturn fract(sin(sn) * c);\n}\nstruct IncidentLight {\n\tvec3 color;\n\tvec3 direction;\n\tbool visible;\n};\nstruct ReflectedLight {\n\tvec3 directDiffuse;\n\tvec3 directSpecular;\n\tvec3 indirectDiffuse;\n\tvec3 indirectSpecular;\n};\nstruct GeometricContext {\n\tvec3 position;\n\tvec3 normal;\n\tvec3 viewDir;\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\tfloat distance = dot( planeNormal, point - pointOnPlane );\n\treturn - distance * planeNormal + point;\n}\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\n}\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\n}\nmat3 transposeMat3( const in mat3 m ) {\n\tmat3 tmp;\n\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n\treturn tmp;\n}\nfloat linearToRelativeLuminance( const in vec3 color ) {\n\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\n\treturn dot( weights, color.rgb );\n}\n";
  
	var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n#define cubeUV_textureSize (1024.0)\nint getFaceFromDirection(vec3 direction) {\n\tvec3 absDirection = abs(direction);\n\tint face = -1;\n\tif( absDirection.x > absDirection.z ) {\n\t\tif(absDirection.x > absDirection.y )\n\t\t\tface = direction.x > 0.0 ? 0 : 3;\n\t\telse\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\n\t}\n\telse {\n\t\tif(absDirection.z > absDirection.y )\n\t\t\tface = direction.z > 0.0 ? 2 : 5;\n\t\telse\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\n\t}\n\treturn face;\n}\n#define cubeUV_maxLods1  (log2(cubeUV_textureSize*0.25) - 1.0)\n#define cubeUV_rangeClamp (exp2((6.0 - 1.0) * 2.0))\nvec2 MipLevelInfo( vec3 vec, float roughnessLevel, float roughness ) {\n\tfloat scale = exp2(cubeUV_maxLods1 - roughnessLevel);\n\tfloat dxRoughness = dFdx(roughness);\n\tfloat dyRoughness = dFdy(roughness);\n\tvec3 dx = dFdx( vec * scale * dxRoughness );\n\tvec3 dy = dFdy( vec * scale * dyRoughness );\n\tfloat d = max( dot( dx, dx ), dot( dy, dy ) );\n\td = clamp(d, 1.0, cubeUV_rangeClamp);\n\tfloat mipLevel = 0.5 * log2(d);\n\treturn vec2(floor(mipLevel), fract(mipLevel));\n}\n#define cubeUV_maxLods2 (log2(cubeUV_textureSize*0.25) - 2.0)\n#define cubeUV_rcpTextureSize (1.0 / cubeUV_textureSize)\nvec2 getCubeUV(vec3 direction, float roughnessLevel, float mipLevel) {\n\tmipLevel = roughnessLevel > cubeUV_maxLods2 - 3.0 ? 0.0 : mipLevel;\n\tfloat a = 16.0 * cubeUV_rcpTextureSize;\n\tvec2 exp2_packed = exp2( vec2( roughnessLevel, mipLevel ) );\n\tvec2 rcp_exp2_packed = vec2( 1.0 ) / exp2_packed;\n\tfloat powScale = exp2_packed.x * exp2_packed.y;\n\tfloat scale = rcp_exp2_packed.x * rcp_exp2_packed.y * 0.25;\n\tfloat mipOffset = 0.75*(1.0 - rcp_exp2_packed.y) * rcp_exp2_packed.x;\n\tbool bRes = mipLevel == 0.0;\n\tscale =  bRes && (scale < a) ? a : scale;\n\tvec3 r;\n\tvec2 offset;\n\tint face = getFaceFromDirection(direction);\n\tfloat rcpPowScale = 1.0 / powScale;\n\tif( face == 0) {\n\t\tr = vec3(direction.x, -direction.z, direction.y);\n\t\toffset = vec2(0.0+mipOffset,0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\n\t}\n\telse if( face == 1) {\n\t\tr = vec3(direction.y, direction.x, direction.z);\n\t\toffset = vec2(scale+mipOffset, 0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\n\t}\n\telse if( face == 2) {\n\t\tr = vec3(direction.z, direction.x, direction.y);\n\t\toffset = vec2(2.0*scale+mipOffset, 0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\n\t}\n\telse if( face == 3) {\n\t\tr = vec3(direction.x, direction.z, direction.y);\n\t\toffset = vec2(0.0+mipOffset,0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\n\t}\n\telse if( face == 4) {\n\t\tr = vec3(direction.y, direction.x, -direction.z);\n\t\toffset = vec2(scale+mipOffset, 0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\n\t}\n\telse {\n\t\tr = vec3(direction.z, -direction.x, direction.y);\n\t\toffset = vec2(2.0*scale+mipOffset, 0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\n\t}\n\tr = normalize(r);\n\tfloat texelOffset = 0.5 * cubeUV_rcpTextureSize;\n\tvec2 s = ( r.yz / abs( r.x ) + vec2( 1.0 ) ) * 0.5;\n\tvec2 base = offset + vec2( texelOffset );\n\treturn base + s * ( scale - 2.0 * texelOffset );\n}\n#define cubeUV_maxLods3 (log2(cubeUV_textureSize*0.25) - 3.0)\nvec4 textureCubeUV(vec3 reflectedDirection, float roughness ) {\n\tfloat roughnessVal = roughness* cubeUV_maxLods3;\n\tfloat r1 = floor(roughnessVal);\n\tfloat r2 = r1 + 1.0;\n\tfloat t = fract(roughnessVal);\n\tvec2 mipInfo = MipLevelInfo(reflectedDirection, r1, roughness);\n\tfloat s = mipInfo.y;\n\tfloat level0 = mipInfo.x;\n\tfloat level1 = level0 + 1.0;\n\tlevel1 = level1 > 5.0 ? 5.0 : level1;\n\tlevel0 += min( floor( s + 0.5 ), 5.0 );\n\tvec2 uv_10 = getCubeUV(reflectedDirection, r1, level0);\n\tvec4 color10 = envMapTexelToLinear(texture2D(envMap, uv_10));\n\tvec2 uv_20 = getCubeUV(reflectedDirection, r2, level0);\n\tvec4 color20 = envMapTexelToLinear(texture2D(envMap, uv_20));\n\tvec4 result = mix(color10, color20, t);\n\treturn vec4(result.rgb, 1.0);\n}\n#endif\n";
  
	var defaultnormal_vertex = "vec3 transformedNormal = normalMatrix * objectNormal;\n#ifdef FLIP_SIDED\n\ttransformedNormal = - transformedNormal;\n#endif\n";
  
	var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n\tuniform sampler2D displacementMap;\n\tuniform float displacementScale;\n\tuniform float displacementBias;\n#endif\n";
  
	var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, uv ).x * displacementScale + displacementBias );\n#endif\n";
  
	var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\n\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\n#endif\n";
  
	var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n\tuniform sampler2D emissiveMap;\n#endif\n";
  
	var encodings_fragment = "  gl_FragColor = linearToOutputTexel( gl_FragColor );\n";
  
	var encodings_pars_fragment = "\nvec4 LinearToLinear( in vec4 value ) {\n\treturn value;\n}\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.xyz, vec3( gammaFactor ) ), value.w );\n}\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\n\treturn vec4( pow( value.xyz, vec3( 1.0 / gammaFactor ) ), value.w );\n}\nvec4 sRGBToLinear( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.w );\n}\nvec4 LinearTosRGB( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.w );\n}\nvec4 RGBEToLinear( in vec4 value ) {\n\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\n}\nvec4 LinearToRGBE( in vec4 value ) {\n\tfloat maxComponent = max( max( value.r, value.g ), value.b );\n\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\n\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\n}\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.xyz * value.w * maxRange, 1.0 );\n}\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.x, max( value.g, value.b ) );\n\tfloat M      = clamp( maxRGB / maxRange, 0.0, 1.0 );\n\tM            = ceil( M * 255.0 ) / 255.0;\n\treturn vec4( value.rgb / ( M * maxRange ), M );\n}\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\n\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\n}\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\n\tfloat maxRGB = max( value.x, max( value.g, value.b ) );\n\tfloat D      = max( maxRange / maxRGB, 1.0 );\n\tD            = min( floor( D ) / 255.0, 1.0 );\n\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\n}\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\nvec4 LinearToLogLuv( in vec4 value )  {\n\tvec3 Xp_Y_XYZp = value.rgb * cLogLuvM;\n\tXp_Y_XYZp = max(Xp_Y_XYZp, vec3(1e-6, 1e-6, 1e-6));\n\tvec4 vResult;\n\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\n\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\n\tvResult.w = fract(Le);\n\tvResult.z = (Le - (floor(vResult.w*255.0))/255.0)/255.0;\n\treturn vResult;\n}\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\nvec4 LogLuvToLinear( in vec4 value ) {\n\tfloat Le = value.z * 255.0 + value.w;\n\tvec3 Xp_Y_XYZp;\n\tXp_Y_XYZp.y = exp2((Le - 127.0) / 2.0);\n\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\n\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\n\tvec3 vRGB = Xp_Y_XYZp.rgb * cLogLuvInverseM;\n\treturn vec4( max(vRGB, 0.0), 1.0 );\n}\n";
  
	var envmap_fragment = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#else\n\t\tvec3 reflectVec = vReflect;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n\t#elif defined( ENVMAP_TYPE_EQUIREC )\n\t\tvec2 sampleUV;\n\t\treflectVec = normalize( reflectVec );\n\t\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\t\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\n\t\tvec4 envColor = texture2D( envMap, sampleUV );\n\t#elif defined( ENVMAP_TYPE_SPHERE )\n\t\treflectVec = normalize( reflectVec );\n\t\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) );\n\t\tvec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );\n\t#else\n\t\tvec4 envColor = vec4( 0.0 );\n\t#endif\n\tenvColor = envMapTexelToLinear( envColor );\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_MIX )\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_ADD )\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\n\t#endif\n#endif\n";
  
	var envmap_pars_fragment = "#if defined( USE_ENVMAP ) || defined( PHYSICAL )\n\tuniform float reflectivity;\n\tuniform float envMapIntensity;\n#endif\n#ifdef USE_ENVMAP\n\t#if ! defined( PHYSICAL ) && ( defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) )\n\t\tvarying vec3 vWorldPosition;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tuniform samplerCube envMap;\n\t#else\n\t\tuniform sampler2D envMap;\n\t#endif\n\tuniform float flipEnvMap;\n\tuniform int maxMipLevel;\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( PHYSICAL )\n\t\tuniform float refractionRatio;\n\t#else\n\t\tvarying vec3 vReflect;\n\t#endif\n#endif\n";
  
	var envmap_pars_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvarying vec3 vWorldPosition;\n\t#else\n\t\tvarying vec3 vReflect;\n\t\tuniform float refractionRatio;\n\t#endif\n#endif\n";
  
	var envmap_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvWorldPosition = worldPosition.xyz;\n\t#else\n\t\tvec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#endif\n#endif\n";
  
	var fog_vertex = "\n#ifdef USE_FOG\nfogDepth = -mvPosition.z;\n#endif";
  
	var fog_pars_vertex = "#ifdef USE_FOG\n  varying float fogDepth;\n#endif\n";
  
	var fog_fragment = "#ifdef USE_FOG\n\t#ifdef FOG_EXP2\n\t\tfloat fogFactor = whiteCompliment( exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 ) );\n\t#else\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\n\t#endif\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif\n";
  
	var fog_pars_fragment = "#ifdef USE_FOG\n\tuniform vec3 fogColor;\n\tvarying float fogDepth;\n\t#ifdef FOG_EXP2\n\t\tuniform float fogDensity;\n\t#else\n\t\tuniform float fogNear;\n\t\tuniform float fogFar;\n\t#endif\n#endif\n";
  
	var gradientmap_pars_fragment = "#ifdef TOON\n\tuniform sampler2D gradientMap;\n\tvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n\t\tfloat dotNL = dot( normal, lightDirection );\n\t\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n\t\t#ifdef USE_GRADIENTMAP\n\t\t\treturn texture2D( gradientMap, coord ).rgb;\n\t\t#else\n\t\t\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\n\t\t#endif\n\t}\n#endif\n";
  
	var lightmap_fragment = "#ifdef USE_LIGHTMAP\n\treflectedLight.indirectDiffuse += PI * texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n#endif\n";
  
	var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n\tuniform sampler2D lightMap;\n\tuniform float lightMapIntensity;\n#endif";
  
	var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n\tvLightBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\n#if NUM_POINT_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_DIR_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\tvLightFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\n\t\t#endif\n\t}\n#endif\n";
  
	var lights_pars_begin = "uniform vec3 ambientLightColor;\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n\tvec3 irradiance = ambientLightColor;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treturn irradiance;\n}\n#if NUM_DIR_LIGHTS > 0\n\tstruct DirectionalLight {\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t};\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tdirectLight.color = directionalLight.color;\n\t\tdirectLight.direction = directionalLight.direction;\n\t\tdirectLight.visible = true;\n\t}\n#endif\n#if NUM_POINT_LIGHTS > 0\n\tstruct PointLight {\n\t\tvec3 position;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t\tfloat shadowCameraNear;\n\t\tfloat shadowCameraFar;\n\t};\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = pointLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tdirectLight.color = pointLight.color;\n\t\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\n\t\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tstruct SpotLight {\n\t\tvec3 position;\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tfloat coneCos;\n\t\tfloat penumbraCos;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t};\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight  ) {\n\t\tvec3 lVector = spotLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tfloat angleCos = dot( directLight.direction, spotLight.direction );\n\t\tif ( angleCos > spotLight.coneCos ) {\n\t\t\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n\t\t\tdirectLight.color = spotLight.color;\n\t\t\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\n\t\t\tdirectLight.visible = true;\n\t\t} else {\n\t\t\tdirectLight.color = vec3( 0.0 );\n\t\t\tdirectLight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n\tstruct RectAreaLight {\n\t\tvec3 color;\n\t\tvec3 position;\n\t\tvec3 halfWidth;\n\t\tvec3 halfHeight;\n\t};\n\tuniform sampler2D ltc_1;\tuniform sampler2D ltc_2;\n\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tstruct HemisphereLight {\n\t\tvec3 direction;\n\t\tvec3 skyColor;\n\t\tvec3 groundColor;\n\t};\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\n\t\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tirradiance *= PI;\n\t\t#endif\n\t\treturn irradiance;\n\t}\n#endif\n";
  
	var lights_pars_maps = "#if defined( USE_ENVMAP ) && defined( PHYSICAL )\n\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\n\t\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\tvec4 envMapColor = textureCubeUV( queryVec, 1.0 );\n\t\t#else\n\t\t\tvec4 envMapColor = vec4( 0.0 );\n\t\t#endif\n\t\treturn PI * envMapColor.rgb * envMapIntensity;\n\t}\n\tfloat getSpecularMIPLevel( const in float blinnShininessExponent, const in int maxMIPLevel ) {\n\t\tfloat maxMIPLevelScalar = float( maxMIPLevel );\n\t\tfloat desiredMIPLevel = maxMIPLevelScalar + 0.79248 - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );\n\t\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\n\t}\n\tvec3 getLightProbeIndirectRadiance( const in GeometricContext geometry, const in float blinnShininessExponent, const in int maxMIPLevel ) {\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( -geometry.viewDir, geometry.normal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( -geometry.viewDir, geometry.normal, refractionRatio );\n\t\t#endif\n\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n\t\tfloat specularMIPLevel = getSpecularMIPLevel( blinnShininessExponent, maxMIPLevel );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\tvec4 envMapColor = textureCubeUV(queryReflectVec, BlinnExponentToGGXRoughness(blinnShininessExponent));\n\t\t#elif defined( ENVMAP_TYPE_EQUIREC )\n\t\t\tvec2 sampleUV;\n\t\t\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\t\t\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, sampleUV, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = texture2D( envMap, sampleUV, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_SPHERE )\n\t\t\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0,0.0,1.0 ) );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#endif\n\t\treturn envMapColor.rgb * envMapIntensity;\n\t}\n#endif\n";
  
	var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;\n";
  
	var lights_phong_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct BlinnPhongMaterial {\n\tvec3\tdiffuseColor;\n\tvec3\tspecularColor;\n\tfloat\tspecularShininess;\n\tfloat\tspecularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\t#ifdef TOON\n\t\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\n\t#else\n\t\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\t\tvec3 irradiance = dotNL * directLight.color;\n\t#endif\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )\t(0)\n";
  
	var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nmaterial.specularRoughness = clamp( roughnessFactor, 0.04, 1.0 );\n#ifdef STANDARD\n\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\n#else\n\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\n\tmaterial.clearCoat = saturate( clearCoat );\tmaterial.clearCoatRoughness = clamp( clearCoatRoughness, 0.04, 1.0 );\n#endif\n";
  
	var lights_physical_pars_fragment = "struct PhysicalMaterial {\n\tvec3\tdiffuseColor;\n\tfloat\tspecularRoughness;\n\tvec3\tspecularColor;\n\t#ifndef STANDARD\n\t\tfloat clearCoat;\n\t\tfloat clearCoatRoughness;\n\t#endif\n};\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\nfloat clearCoatDHRApprox( const in float roughness, const in float dotNL ) {\n\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t\tvec3 normal = geometry.normal;\n\t\tvec3 viewDir = geometry.viewDir;\n\t\tvec3 position = geometry.position;\n\t\tvec3 lightPos = rectAreaLight.position;\n\t\tvec3 halfWidth = rectAreaLight.halfWidth;\n\t\tvec3 halfHeight = rectAreaLight.halfHeight;\n\t\tvec3 lightColor = rectAreaLight.color;\n\t\tfloat roughness = material.specularRoughness;\n\t\tvec3 rectCoords[ 4 ];\n\t\trectCoords[ 0 ] = lightPos - halfWidth - halfHeight;\t\trectCoords[ 1 ] = lightPos + halfWidth - halfHeight;\n\t\trectCoords[ 2 ] = lightPos + halfWidth + halfHeight;\n\t\trectCoords[ 3 ] = lightPos - halfWidth + halfHeight;\n\t\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\n\t\tvec4 t1 = texture2D( ltc_1, uv );\n\t\tvec4 t2 = texture2D( ltc_2, uv );\n\t\tmat3 mInv = mat3(\n\t\t\tvec3( t1.x, 0, t1.y ),\n\t\t\tvec3(    0, 1,    0 ),\n\t\t\tvec3( t1.z, 0, t1.w )\n\t\t);\n\t\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n\t\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n\t\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n\t}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\t#ifndef STANDARD\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\n\t#else\n\t\tfloat clearCoatDHR = 0.0;\n\t#endif\n\treflectedLight.directSpecular += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry, material.specularColor, material.specularRoughness );\n\treflectedLight.directDiffuse += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\t#ifndef STANDARD\n\t\treflectedLight.directSpecular += irradiance * material.clearCoat * BRDF_Specular_GGX( directLight, geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\n\t#endif\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 clearCoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t#ifndef STANDARD\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\tfloat dotNL = dotNV;\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\n\t#else\n\t\tfloat clearCoatDHR = 0.0;\n\t#endif\n\treflectedLight.indirectSpecular += ( 1.0 - clearCoatDHR ) * radiance * BRDF_Specular_GGX_Environment( geometry, material.specularColor, material.specularRoughness );\n\t#ifndef STANDARD\n\t\treflectedLight.indirectSpecular += clearCoatRadiance * material.clearCoat * BRDF_Specular_GGX_Environment( geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\n\t#endif\n}\n#define RE_Direct\t\t\t\tRE_Direct_Physical\n#define RE_Direct_RectArea\t\tRE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\n#define Material_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.specularRoughness )\n#define Material_ClearCoat_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.clearCoatRoughness )\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}\n";
  
	var lights_fragment_begin = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = normalize( vViewPosition );\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n\tPointLight pointLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( pointLight.shadow, directLight.visible ) ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n\tSpotLight spotLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( spotLight.shadow, directLight.visible ) ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n\tDirectionalLight directionalLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( directionalLight.shadow, directLight.visible ) ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n\tRectAreaLight rectAreaLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n\t\trectAreaLight = rectAreaLights[ i ];\n\t\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if defined( RE_IndirectDiffuse )\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n\t#if ( NUM_HEMI_LIGHTS > 0 )\n\t\t#pragma unroll_loop\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t}\n\t#endif\n#endif\n#if defined( RE_IndirectSpecular )\n\tvec3 radiance = vec3( 0.0 );\n\tvec3 clearCoatRadiance = vec3( 0.0 );\n#endif\n";
  
	var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n\t#ifdef USE_LIGHTMAP\n\t\tvec3 lightMapIrradiance = texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tlightMapIrradiance *= PI;\n\t\t#endif\n\t\tirradiance += lightMapIrradiance;\n\t#endif\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL ) && defined( ENVMAP_TYPE_CUBE_UV )\n\t\tirradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );\n\t#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n\tradiance += getLightProbeIndirectRadiance( geometry, Material_BlinnShininessExponent( material ), maxMipLevel );\n\t#ifndef STANDARD\n\t\tclearCoatRadiance += getLightProbeIndirectRadiance( geometry, Material_ClearCoat_BlinnShininessExponent( material ), maxMipLevel );\n\t#endif\n#endif\n";
  
	var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n\tRE_IndirectSpecular( radiance, clearCoatRadiance, geometry, material, reflectedLight );\n#endif\n";
  
	var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tgl_FragDepthEXT = log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";
  
	var logdepthbuf_pars_fragment = "#ifdef USE_LOGDEPTHBUF\n\tuniform float logDepthBufFC;\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t#endif\n#endif\n";
  
	var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t#endif\n\tuniform float logDepthBufFC;\n#endif";
  
	var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvFragDepth = 1.0 + gl_Position.w;\n\t#else\n\t\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\n\t\tgl_Position.z *= gl_Position.w;\n\t#endif\n#endif\n";
  
	var map_fragment = "#ifdef USE_MAP\n\tvec4 texelColor = texture2D( map, vUv );\n\ttexelColor = mapTexelToLinear( texelColor );\n\tdiffuseColor *= texelColor;\n#endif\n";
  
	var map_pars_fragment = "#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif\n";
  
	var map_particle_fragment = "#ifdef USE_MAP\n\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n\tvec4 mapTexel = texture2D( map, uv );\n\tdiffuseColor *= mapTexelToLinear( mapTexel );\n#endif\n";
  
	var map_particle_pars_fragment = "#ifdef USE_MAP\n\tuniform mat3 uvTransform;\n\tuniform sampler2D map;\n#endif\n";
  
	var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\n\tmetalnessFactor *= texelMetalness.b;\n#endif\n";
  
	var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n\tuniform sampler2D metalnessMap;\n#endif";
  
	var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n\tobjectNormal += ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];\n\tobjectNormal += ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];\n\tobjectNormal += ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];\n\tobjectNormal += ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];\n#endif\n";
  
	var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n\t#ifndef USE_MORPHNORMALS\n\tuniform float morphTargetInfluences[ 8 ];\n\t#else\n\tuniform float morphTargetInfluences[ 4 ];\n\t#endif\n#endif";
  
	var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n\ttransformed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];\n\ttransformed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];\n\ttransformed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];\n\ttransformed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];\n\t#ifndef USE_MORPHNORMALS\n\ttransformed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];\n\ttransformed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];\n\ttransformed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];\n\ttransformed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];\n\t#endif\n#endif\n";
  
	var normal_fragment_begin = "#ifdef FLAT_SHADED\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n\tvec3 normal = normalize( cross( fdx, fdy ) );\n#else\n\tvec3 normal = normalize( vNormal );\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t#endif\n#endif\n";
  
	var normal_fragment_maps = "#ifdef USE_NORMALMAP\n\tnormal = perturbNormal2Arb( -vViewPosition, normal );\n#elif defined( USE_BUMPMAP )\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\n#endif\n";
  
	var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n\tuniform sampler2D normalMap;\n\tuniform vec2 normalScale;\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {\n\t\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\n\t\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\n\t\tvec2 st0 = dFdx( vUv.st );\n\t\tvec2 st1 = dFdy( vUv.st );\n\t\tfloat scale = sign( st1.t * st0.s - st0.t * st1.s );\n\t\tvec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );\n\t\tvec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );\n\t\tvec3 N = normalize( surf_norm );\n\t\tmat3 tsn = mat3( S, T, N );\n\t\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\t\tmapN.xy *= normalScale;\n\t\tmapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n\t\treturn normalize( tsn * mapN );\n\t}\n#endif\n";
  
	var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n\treturn normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n\treturn 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256.,  256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n\tvec4 r = vec4( fract( v * PackFactors ), v );\n\tr.yzw -= r.xyz * ShiftRight8;\treturn r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n\treturn dot( v, UnpackFactors );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n\treturn linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\n}\n";
  
	var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n\tgl_FragColor.rgb *= gl_FragColor.a;\n#endif\n";
  
	var project_vertex = "vec4 mvPosition = modelViewMatrix * vec4( transformed, 1.0 );\ngl_Position = projectionMatrix * mvPosition;\n";
  
	var dithering_fragment = "#if defined( DITHERING )\n  gl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif\n";
  
	var dithering_pars_fragment = "#if defined( DITHERING )\n\tvec3 dithering( vec3 color ) {\n\t\tfloat grid_position = rand( gl_FragCoord.xy );\n\t\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n\t\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n\t\treturn color + dither_shift_RGB;\n\t}\n#endif\n";
  
	var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\n\troughnessFactor *= texelRoughness.g;\n#endif\n";
  
	var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n\tuniform sampler2D roughnessMap;\n#endif";
  
	var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHTS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHTS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHTS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\n\t#endif\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n\t}\n\tfloat texture2DShadowLerp( sampler2D depths, vec2 size, vec2 uv, float compare ) {\n\t\tconst vec2 offset = vec2( 0.0, 1.0 );\n\t\tvec2 texelSize = vec2( 1.0 ) / size;\n\t\tvec2 centroidUV = floor( uv * size + 0.5 ) / size;\n\t\tfloat lb = texture2DCompare( depths, centroidUV + texelSize * offset.xx, compare );\n\t\tfloat lt = texture2DCompare( depths, centroidUV + texelSize * offset.xy, compare );\n\t\tfloat rb = texture2DCompare( depths, centroidUV + texelSize * offset.yx, compare );\n\t\tfloat rt = texture2DCompare( depths, centroidUV + texelSize * offset.yy, compare );\n\t\tvec2 f = fract( uv * size + 0.5 );\n\t\tfloat a = mix( lb, lt, f.y );\n\t\tfloat b = mix( rb, rt, f.y );\n\t\tfloat c = mix( a, b, f.x );\n\t\treturn c;\n\t}\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tfloat shadow = 1.0;\n\t\tshadowCoord.xyz /= shadowCoord.w;\n\t\tshadowCoord.z += shadowBias;\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n\t\tbool inFrustum = all( inFrustumVec );\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n\t\tbool frustumTest = all( frustumTestVec );\n\t\tif ( frustumTest ) {\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\tshadow = (\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#endif\n\t\t}\n\t\treturn shadow;\n\t}\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\n\t\tvec3 absV = abs( v );\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n\t\tabsV *= scaleToCube;\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n\t\tvec2 planar = v.xy;\n\t\tfloat almostATexel = 1.5 * texelSizeY;\n\t\tfloat almostOne = 1.0 - almostATexel;\n\t\tif ( absV.z >= almostOne ) {\n\t\t\tif ( v.z > 0.0 )\n\t\t\t\tplanar.x = 4.0 - v.x;\n\t\t} else if ( absV.x >= almostOne ) {\n\t\t\tfloat signX = sign( v.x );\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\n\t\t} else if ( absV.y >= almostOne ) {\n\t\t\tfloat signY = sign( v.y );\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\n\t\t\tplanar.y = v.z * signY - 2.0;\n\t\t}\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n\t}\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n\t\tvec3 lightToPosition = shadowCoord.xyz;\n\t\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\t\tdp += shadowBias;\n\t\tvec3 bd3D = normalize( lightToPosition );\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n\t\t#endif\n\t}\n#endif\n";
  
	var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHTS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHTS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHTS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\n\t#endif\n#endif\n";
  
	var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n#endif\n";
  
	var shadowmask_pars_fragment = "float getShadowMask() {\n\tfloat shadow = 1.0;\n\t#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\tDirectionalLight directionalLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tshadow *= bool( directionalLight.shadow ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t}\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\tSpotLight spotLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tshadow *= bool( spotLight.shadow ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t}\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\tPointLight pointLight;\n\t#pragma unroll_loop\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tshadow *= bool( pointLight.shadow ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n\t}\n\t#endif\n\t#endif\n\treturn shadow;\n}\n";
  
	var skinbase_vertex = "#ifdef USE_SKINNING\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";
  
	var skinning_pars_vertex = "#ifdef USE_SKINNING\n\tuniform mat4 bindMatrix;\n\tuniform mat4 bindMatrixInverse;\n\t#ifdef BONE_TEXTURE\n\t\tuniform sampler2D boneTexture;\n\t\tuniform int boneTextureSize;\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tfloat j = i * 4.0;\n\t\t\tfloat x = mod( j, float( boneTextureSize ) );\n\t\t\tfloat y = floor( j / float( boneTextureSize ) );\n\t\t\tfloat dx = 1.0 / float( boneTextureSize );\n\t\t\tfloat dy = 1.0 / float( boneTextureSize );\n\t\t\ty = dy * ( y + 0.5 );\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\n\t\t\treturn bone;\n\t\t}\n\t#else\n\t\tuniform mat4 boneMatrices[ MAX_BONES ];\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tmat4 bone = boneMatrices[ int(i) ];\n\t\t\treturn bone;\n\t\t}\n\t#endif\n#endif\n";
  
	var skinning_vertex = "#ifdef USE_SKINNING\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n\tvec4 skinned = vec4( 0.0 );\n\tskinned += boneMatX * skinVertex * skinWeight.x;\n\tskinned += boneMatY * skinVertex * skinWeight.y;\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\n\tskinned += boneMatW * skinVertex * skinWeight.w;\n\ttransformed = ( bindMatrixInverse * skinned ).xyz;\n#endif\n";
  
	var skinnormal_vertex = "#ifdef USE_SKINNING\n\tmat4 skinMatrix = mat4( 0.0 );\n\tskinMatrix += skinWeight.x * boneMatX;\n\tskinMatrix += skinWeight.y * boneMatY;\n\tskinMatrix += skinWeight.z * boneMatZ;\n\tskinMatrix += skinWeight.w * boneMatW;\n\tskinMatrix  = bindMatrixInverse * skinMatrix * bindMatrix;\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n#endif\n";
  
	var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\n\tspecularStrength = texelSpecular.r;\n#else\n\tspecularStrength = 1.0;\n#endif";
  
	var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n\tuniform sampler2D specularMap;\n#endif";
  
	var tonemapping_fragment = "#if defined( TONE_MAPPING )\n  gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif\n";
  
	var tonemapping_pars_fragment = "#ifndef saturate\n\t#define saturate(a) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nuniform float toneMappingWhitePoint;\nvec3 LinearToneMapping( vec3 color ) {\n\treturn toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\treturn saturate( color / ( vec3( 1.0 ) + color ) );\n}\n#define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )\nvec3 Uncharted2ToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\treturn saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\tcolor = max( vec3( 0.0 ), color - 0.004 );\n\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\n";
  
	var uv_pars_fragment = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvarying vec2 vUv;\n#endif";
  
	var uv_pars_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvarying vec2 vUv;\n\tuniform mat3 uvTransform;\n#endif\n";
  
	var uv_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n#endif";
  
	var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvarying vec2 vUv2;\n#endif";
  
	var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tattribute vec2 uv2;\n\tvarying vec2 vUv2;\n#endif";
  
	var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvUv2 = uv2;\n#endif";
  
	var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\n\tvec4 worldPosition = modelMatrix * vec4( transformed, 1.0 );\n#endif\n";
  
	var cube_frag = "uniform samplerCube tCube;\nuniform float tFlip;\nuniform float opacity;\nvarying vec3 vWorldPosition;\nvoid main() {\n\tgl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );\n\tgl_FragColor.a *= opacity;\n}\n";
  
	var cube_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\tgl_Position.z = gl_Position.w;\n}\n";
  
	var depth_frag = "#if DEPTH_PACKING == 3200\n\tuniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#if DEPTH_PACKING == 3200\n\t\tdiffuseColor.a = opacity;\n\t#endif\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <logdepthbuf_fragment>\n\t#if DEPTH_PACKING == 3200\n\t\tgl_FragColor = vec4( vec3( 1.0 - gl_FragCoord.z ), opacity );\n\t#elif DEPTH_PACKING == 3201\n\t\tgl_FragColor = packDepthToRGBA( gl_FragCoord.z );\n\t#endif\n}\n";
  
	var depth_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n}\n";
  
	var distanceRGBA_frag = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\tfloat dist = length( vWorldPosition - referencePosition );\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n\tdist = saturate( dist );\n\tgl_FragColor = packDepthToRGBA( dist );\n}\n";
  
	var distanceRGBA_vert = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}\n";
  
	var equirect_frag = "uniform sampler2D tEquirect;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";
  
	var equirect_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n";
  
	var linedashed_frag = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";
  
	var linedashed_vert = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\tvLineDistance = scale * lineDistance;\n\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var meshbasic_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\t#ifdef USE_LIGHTMAP\n\t\treflectedLight.indirectDiffuse += texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n\t#else\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\n\t#endif\n\t#include <aomap_fragment>\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";
  
	var meshbasic_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_ENVMAP\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <envmap_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var meshlambert_frag = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_pars_maps>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <emissivemap_fragment>\n\treflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );\n\t#include <lightmap_fragment>\n\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n\t#else\n\t\treflectedLight.directDiffuse = vLightFront;\n\t#endif\n\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}\n";
  
	var meshlambert_vert = "#define LAMBERT\nvarying vec3 vLightFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_pars_maps>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <lights_lambert_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var meshphong_frag = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <lights_pars_maps>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_phong_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}\n";
  
	var meshphong_vert = "#define PHONG\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var meshphysical_frag = "#define PHYSICAL\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifndef STANDARD\n\tuniform float clearCoat;\n\tuniform float clearCoatRoughness;\n#endif\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <cube_uv_reflection_fragment>\n#include <lights_pars_begin>\n#include <lights_pars_maps>\n#include <lights_physical_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <roughnessmap_fragment>\n\t#include <metalnessmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_physical_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}\n";
  
	var meshphysical_vert = "#define PHYSICAL\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var normal_frag = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\nvoid main() {\n\t#include <logdepthbuf_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\n}\n";
  
	var normal_vert = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n}\n";
  
	var points_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_particle_fragment>\n\t#include <color_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";
  
	var points_vert = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\t#ifdef USE_SIZEATTENUATION\n\t\tgl_PointSize = size * ( scale / - mvPosition.z );\n\t#else\n\t\tgl_PointSize = size;\n\t#endif\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var shadow_frag = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n\t#include <fog_fragment>\n}\n";
  
	var shadow_vert = "#include <fog_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}\n";
  
	var ShaderChunk = {
		alphamap_fragment: alphamap_fragment,
		alphamap_pars_fragment: alphamap_pars_fragment,
		alphatest_fragment: alphatest_fragment,
		aomap_fragment: aomap_fragment,
		aomap_pars_fragment: aomap_pars_fragment,
		begin_vertex: begin_vertex,
		beginnormal_vertex: beginnormal_vertex,
		bsdfs: bsdfs,
		bumpmap_pars_fragment: bumpmap_pars_fragment,
		clipping_planes_fragment: clipping_planes_fragment,
		clipping_planes_pars_fragment: clipping_planes_pars_fragment,
		clipping_planes_pars_vertex: clipping_planes_pars_vertex,
		clipping_planes_vertex: clipping_planes_vertex,
		color_fragment: color_fragment,
		color_pars_fragment: color_pars_fragment,
		color_pars_vertex: color_pars_vertex,
		color_vertex: color_vertex,
		common: common,
		cube_uv_reflection_fragment: cube_uv_reflection_fragment,
		defaultnormal_vertex: defaultnormal_vertex,
		displacementmap_pars_vertex: displacementmap_pars_vertex,
		displacementmap_vertex: displacementmap_vertex,
		emissivemap_fragment: emissivemap_fragment,
		emissivemap_pars_fragment: emissivemap_pars_fragment,
		encodings_fragment: encodings_fragment,
		encodings_pars_fragment: encodings_pars_fragment,
		envmap_fragment: envmap_fragment,
		envmap_pars_fragment: envmap_pars_fragment,
		envmap_pars_vertex: envmap_pars_vertex,
		envmap_vertex: envmap_vertex,
		fog_vertex: fog_vertex,
		fog_pars_vertex: fog_pars_vertex,
		fog_fragment: fog_fragment,
		fog_pars_fragment: fog_pars_fragment,
		gradientmap_pars_fragment: gradientmap_pars_fragment,
		lightmap_fragment: lightmap_fragment,
		lightmap_pars_fragment: lightmap_pars_fragment,
		lights_lambert_vertex: lights_lambert_vertex,
		lights_pars_begin: lights_pars_begin,
		lights_pars_maps: lights_pars_maps,
		lights_phong_fragment: lights_phong_fragment,
		lights_phong_pars_fragment: lights_phong_pars_fragment,
		lights_physical_fragment: lights_physical_fragment,
		lights_physical_pars_fragment: lights_physical_pars_fragment,
		lights_fragment_begin: lights_fragment_begin,
		lights_fragment_maps: lights_fragment_maps,
		lights_fragment_end: lights_fragment_end,
		logdepthbuf_fragment: logdepthbuf_fragment,
		logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
		logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
		logdepthbuf_vertex: logdepthbuf_vertex,
		map_fragment: map_fragment,
		map_pars_fragment: map_pars_fragment,
		map_particle_fragment: map_particle_fragment,
		map_particle_pars_fragment: map_particle_pars_fragment,
		metalnessmap_fragment: metalnessmap_fragment,
		metalnessmap_pars_fragment: metalnessmap_pars_fragment,
		morphnormal_vertex: morphnormal_vertex,
		morphtarget_pars_vertex: morphtarget_pars_vertex,
		morphtarget_vertex: morphtarget_vertex,
		normal_fragment_begin: normal_fragment_begin,
		normal_fragment_maps: normal_fragment_maps,
		normalmap_pars_fragment: normalmap_pars_fragment,
		packing: packing,
		premultiplied_alpha_fragment: premultiplied_alpha_fragment,
		project_vertex: project_vertex,
		dithering_fragment: dithering_fragment,
		dithering_pars_fragment: dithering_pars_fragment,
		roughnessmap_fragment: roughnessmap_fragment,
		roughnessmap_pars_fragment: roughnessmap_pars_fragment,
		shadowmap_pars_fragment: shadowmap_pars_fragment,
		shadowmap_pars_vertex: shadowmap_pars_vertex,
		shadowmap_vertex: shadowmap_vertex,
		shadowmask_pars_fragment: shadowmask_pars_fragment,
		skinbase_vertex: skinbase_vertex,
		skinning_pars_vertex: skinning_pars_vertex,
		skinning_vertex: skinning_vertex,
		skinnormal_vertex: skinnormal_vertex,
		specularmap_fragment: specularmap_fragment,
		specularmap_pars_fragment: specularmap_pars_fragment,
		tonemapping_fragment: tonemapping_fragment,
		tonemapping_pars_fragment: tonemapping_pars_fragment,
		uv_pars_fragment: uv_pars_fragment,
		uv_pars_vertex: uv_pars_vertex,
		uv_vertex: uv_vertex,
		uv2_pars_fragment: uv2_pars_fragment,
		uv2_pars_vertex: uv2_pars_vertex,
		uv2_vertex: uv2_vertex,
		worldpos_vertex: worldpos_vertex,
  
		cube_frag: cube_frag,
		cube_vert: cube_vert,
		depth_frag: depth_frag,
		depth_vert: depth_vert,
		distanceRGBA_frag: distanceRGBA_frag,
		distanceRGBA_vert: distanceRGBA_vert,
		equirect_frag: equirect_frag,
		equirect_vert: equirect_vert,
		linedashed_frag: linedashed_frag,
		linedashed_vert: linedashed_vert,
		meshbasic_frag: meshbasic_frag,
		meshbasic_vert: meshbasic_vert,
		meshlambert_frag: meshlambert_frag,
		meshlambert_vert: meshlambert_vert,
		meshphong_frag: meshphong_frag,
		meshphong_vert: meshphong_vert,
		meshphysical_frag: meshphysical_frag,
		meshphysical_vert: meshphysical_vert,
		normal_frag: normal_frag,
		normal_vert: normal_vert,
		points_frag: points_frag,
		points_vert: points_vert,
		shadow_frag: shadow_frag,
		shadow_vert: shadow_vert
	};
  
	/**
	 * Uniform Utilities
	 */
  
	var UniformsUtils = {
  
		merge: function ( uniforms ) {
  
			var merged = {};
  
			for ( var u = 0; u < uniforms.length; u ++ ) {
  
				var tmp = this.clone( uniforms[ u ] );
  
				for ( var p in tmp ) {
  
					merged[ p ] = tmp[ p ];
  
				}
  
			}
  
			return merged;
  
		},
  
		clone: function ( uniforms_src ) {
  
			var uniforms_dst = {};
  
			for ( var u in uniforms_src ) {
  
				uniforms_dst[ u ] = {};
  
				for ( var p in uniforms_src[ u ] ) {
  
					var parameter_src = uniforms_src[ u ][ p ];
  
					if ( parameter_src && ( parameter_src.isColor ||
						parameter_src.isMatrix3 || parameter_src.isMatrix4 ||
						parameter_src.isVector2 || parameter_src.isVector3 || parameter_src.isVector4 ||
						parameter_src.isTexture ) ) {
  
						uniforms_dst[ u ][ p ] = parameter_src.clone();
  
					} else if ( Array.isArray( parameter_src ) ) {
  
						uniforms_dst[ u ][ p ] = parameter_src.slice();
  
					} else {
  
						uniforms_dst[ u ][ p ] = parameter_src;
  
					}
  
				}
  
			}
  
			return uniforms_dst;
  
		}
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var ColorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,
		'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,
		'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,
		'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,
		'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,
		'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,
		'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,
		'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,
		'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,
		'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,
		'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,
		'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,
		'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,
		'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,
		'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,
		'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,
		'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,
		'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,
		'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,
		'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'rebeccapurple': 0x663399, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,
		'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,
		'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,
		'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,
		'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };
  
	function Color( r, g, b ) {
  
		if ( g === undefined && b === undefined ) {
  
			// r is THREE.Color, hex or string
			return this.set( r );
  
		}
  
		return this.setRGB( r, g, b );
  
	}
  
	Object.assign( Color.prototype, {
  
		isColor: true,
  
		r: 1, g: 1, b: 1,
  
		set: function ( value ) {
  
			if ( value && value.isColor ) {
  
				this.copy( value );
  
			} else if ( typeof value === 'number' ) {
  
				this.setHex( value );
  
			} else if ( typeof value === 'string' ) {
  
				this.setStyle( value );
  
			}
  
			return this;
  
		},
  
		setScalar: function ( scalar ) {
  
			this.r = scalar;
			this.g = scalar;
			this.b = scalar;
  
			return this;
  
		},
  
		setHex: function ( hex ) {
  
			hex = Math.floor( hex );
  
			this.r = ( hex >> 16 & 255 ) / 255;
			this.g = ( hex >> 8 & 255 ) / 255;
			this.b = ( hex & 255 ) / 255;
  
			return this;
  
		},
  
		setRGB: function ( r, g, b ) {
  
			this.r = r;
			this.g = g;
			this.b = b;
  
			return this;
  
		},
  
		setHSL: function () {
  
			function hue2rgb( p, q, t ) {
  
				if ( t < 0 ) t += 1;
				if ( t > 1 ) t -= 1;
				if ( t < 1 / 6 ) return p + ( q - p ) * 6 * t;
				if ( t < 1 / 2 ) return q;
				if ( t < 2 / 3 ) return p + ( q - p ) * 6 * ( 2 / 3 - t );
				return p;
  
			}
  
			return function setHSL( h, s, l ) {
  
				// h,s,l ranges are in 0.0 - 1.0
				h = _Math.euclideanModulo( h, 1 );
				s = _Math.clamp( s, 0, 1 );
				l = _Math.clamp( l, 0, 1 );
  
				if ( s === 0 ) {
  
					this.r = this.g = this.b = l;
  
				} else {
  
					var p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );
					var q = ( 2 * l ) - p;
  
					this.r = hue2rgb( q, p, h + 1 / 3 );
					this.g = hue2rgb( q, p, h );
					this.b = hue2rgb( q, p, h - 1 / 3 );
  
				}
  
				return this;
  
			};
  
		}(),
  
		setStyle: function ( style ) {
  
			function handleAlpha( string ) {
  
				if ( string === undefined ) return;
  
				if ( parseFloat( string ) < 1 ) {
  
					console.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );
  
				}
  
			}
  
  
			var m;
  
			if ( m = /^((?:rgb|hsl)a?)\(\s*([^\)]*)\)/.exec( style ) ) {
  
				// rgb / hsl
  
				var color;
				var name = m[ 1 ];
				var components = m[ 2 ];
  
				switch ( name ) {
  
					case 'rgb':
					case 'rgba':
  
						if ( color = /^(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {
  
							// rgb(255,0,0) rgba(255,0,0,0.5)
							this.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;
							this.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;
							this.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;
  
							handleAlpha( color[ 5 ] );
  
							return this;
  
						}
  
						if ( color = /^(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {
  
							// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
							this.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;
							this.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;
							this.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;
  
							handleAlpha( color[ 5 ] );
  
							return this;
  
						}
  
						break;
  
					case 'hsl':
					case 'hsla':
  
						if ( color = /^([0-9]*\.?[0-9]+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {
  
							// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
							var h = parseFloat( color[ 1 ] ) / 360;
							var s = parseInt( color[ 2 ], 10 ) / 100;
							var l = parseInt( color[ 3 ], 10 ) / 100;
  
							handleAlpha( color[ 5 ] );
  
							return this.setHSL( h, s, l );
  
						}
  
						break;
  
				}
  
			} else if ( m = /^\#([A-Fa-f0-9]+)$/.exec( style ) ) {
  
				// hex color
  
				var hex = m[ 1 ];
				var size = hex.length;
  
				if ( size === 3 ) {
  
					// #ff0
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;
  
					return this;
  
				} else if ( size === 6 ) {
  
					// #ff0000
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;
  
					return this;
  
				}
  
			}
  
			if ( style && style.length > 0 ) {
  
				// color keywords
				var hex = ColorKeywords[ style ];
  
				if ( hex !== undefined ) {
  
					// red
					this.setHex( hex );
  
				} else {
  
					// unknown color
					console.warn( 'THREE.Color: Unknown color ' + style );
  
				}
  
			}
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor( this.r, this.g, this.b );
  
		},
  
		copy: function ( color ) {
  
			this.r = color.r;
			this.g = color.g;
			this.b = color.b;
  
			return this;
  
		},
  
		copyGammaToLinear: function ( color, gammaFactor ) {
  
			if ( gammaFactor === undefined ) gammaFactor = 2.0;
  
			this.r = Math.pow( color.r, gammaFactor );
			this.g = Math.pow( color.g, gammaFactor );
			this.b = Math.pow( color.b, gammaFactor );
  
			return this;
  
		},
  
		copyLinearToGamma: function ( color, gammaFactor ) {
  
			if ( gammaFactor === undefined ) gammaFactor = 2.0;
  
			var safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;
  
			this.r = Math.pow( color.r, safeInverse );
			this.g = Math.pow( color.g, safeInverse );
			this.b = Math.pow( color.b, safeInverse );
  
			return this;
  
		},
  
		convertGammaToLinear: function ( gammaFactor ) {
  
			this.copyGammaToLinear( this, gammaFactor );
  
			return this;
  
		},
  
		convertLinearToGamma: function ( gammaFactor ) {
  
			this.copyLinearToGamma( this, gammaFactor );
  
			return this;
  
		},
  
		getHex: function () {
  
			return ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;
  
		},
  
		getHexString: function () {
  
			return ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );
  
		},
  
		getHSL: function ( target ) {
  
			// h,s,l ranges are in 0.0 - 1.0
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Color: .getHSL() target is now required' );
				target = { h: 0, s: 0, l: 0 };
  
			}
  
			var r = this.r, g = this.g, b = this.b;
  
			var max = Math.max( r, g, b );
			var min = Math.min( r, g, b );
  
			var hue, saturation;
			var lightness = ( min + max ) / 2.0;
  
			if ( min === max ) {
  
				hue = 0;
				saturation = 0;
  
			} else {
  
				var delta = max - min;
  
				saturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );
  
				switch ( max ) {
  
					case r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;
					case g: hue = ( b - r ) / delta + 2; break;
					case b: hue = ( r - g ) / delta + 4; break;
  
				}
  
				hue /= 6;
  
			}
  
			target.h = hue;
			target.s = saturation;
			target.l = lightness;
  
			return target;
  
		},
  
		getStyle: function () {
  
			return 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';
  
		},
  
		offsetHSL: function () {
  
			var hsl = {};
  
			return function ( h, s, l ) {
  
				this.getHSL( hsl );
  
				hsl.h += h; hsl.s += s; hsl.l += l;
  
				this.setHSL( hsl.h, hsl.s, hsl.l );
  
				return this;
  
			};
  
		}(),
  
		add: function ( color ) {
  
			this.r += color.r;
			this.g += color.g;
			this.b += color.b;
  
			return this;
  
		},
  
		addColors: function ( color1, color2 ) {
  
			this.r = color1.r + color2.r;
			this.g = color1.g + color2.g;
			this.b = color1.b + color2.b;
  
			return this;
  
		},
  
		addScalar: function ( s ) {
  
			this.r += s;
			this.g += s;
			this.b += s;
  
			return this;
  
		},
  
		sub: function ( color ) {
  
			this.r = Math.max( 0, this.r - color.r );
			this.g = Math.max( 0, this.g - color.g );
			this.b = Math.max( 0, this.b - color.b );
  
			return this;
  
		},
  
		multiply: function ( color ) {
  
			this.r *= color.r;
			this.g *= color.g;
			this.b *= color.b;
  
			return this;
  
		},
  
		multiplyScalar: function ( s ) {
  
			this.r *= s;
			this.g *= s;
			this.b *= s;
  
			return this;
  
		},
  
		lerp: function ( color, alpha ) {
  
			this.r += ( color.r - this.r ) * alpha;
			this.g += ( color.g - this.g ) * alpha;
			this.b += ( color.b - this.b ) * alpha;
  
			return this;
  
		},
  
		equals: function ( c ) {
  
			return ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );
  
		},
  
		fromArray: function ( array, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.r = array[ offset ];
			this.g = array[ offset + 1 ];
			this.b = array[ offset + 2 ];
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this.r;
			array[ offset + 1 ] = this.g;
			array[ offset + 2 ] = this.b;
  
			return array;
  
		},
  
		toJSON: function () {
  
			return this.getHex();
  
		}
  
	} );
  
	/**
	 * Uniforms library for shared webgl shaders
	 */
  
	var UniformsLib = {
  
		common: {
  
			diffuse: { value: new Color( 0xeeeeee ) },
			opacity: { value: 1.0 },
  
			map: { value: null },
			uvTransform: { value: new Matrix3() },
  
			alphaMap: { value: null },
  
		},
  
		specularmap: {
  
			specularMap: { value: null },
  
		},
  
		envmap: {
  
			envMap: { value: null },
			flipEnvMap: { value: - 1 },
			reflectivity: { value: 1.0 },
			refractionRatio: { value: 0.98 },
			maxMipLevel: { value: 0 }
  
		},
  
		aomap: {
  
			aoMap: { value: null },
			aoMapIntensity: { value: 1 }
  
		},
  
		lightmap: {
  
			lightMap: { value: null },
			lightMapIntensity: { value: 1 }
  
		},
  
		emissivemap: {
  
			emissiveMap: { value: null }
  
		},
  
		bumpmap: {
  
			bumpMap: { value: null },
			bumpScale: { value: 1 }
  
		},
  
		normalmap: {
  
			normalMap: { value: null },
			normalScale: { value: new Vector2( 1, 1 ) }
  
		},
  
		displacementmap: {
  
			displacementMap: { value: null },
			displacementScale: { value: 1 },
			displacementBias: { value: 0 }
  
		},
  
		roughnessmap: {
  
			roughnessMap: { value: null }
  
		},
  
		metalnessmap: {
  
			metalnessMap: { value: null }
  
		},
  
		gradientmap: {
  
			gradientMap: { value: null }
  
		},
  
		fog: {
  
			fogDensity: { value: 0.00025 },
			fogNear: { value: 1 },
			fogFar: { value: 2000 },
			fogColor: { value: new Color( 0xffffff ) }
  
		},
  
		lights: {
  
			ambientLightColor: { value: [] },
  
			directionalLights: { value: [], properties: {
				direction: {},
				color: {},
  
				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {}
			} },
  
			directionalShadowMap: { value: [] },
			directionalShadowMatrix: { value: [] },
  
			spotLights: { value: [], properties: {
				color: {},
				position: {},
				direction: {},
				distance: {},
				coneCos: {},
				penumbraCos: {},
				decay: {},
  
				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {}
			} },
  
			spotShadowMap: { value: [] },
			spotShadowMatrix: { value: [] },
  
			pointLights: { value: [], properties: {
				color: {},
				position: {},
				decay: {},
				distance: {},
  
				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {},
				shadowCameraNear: {},
				shadowCameraFar: {}
			} },
  
			pointShadowMap: { value: [] },
			pointShadowMatrix: { value: [] },
  
			hemisphereLights: { value: [], properties: {
				direction: {},
				skyColor: {},
				groundColor: {}
			} },
  
			// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
			rectAreaLights: { value: [], properties: {
				color: {},
				position: {},
				width: {},
				height: {}
			} }
  
		},
  
		points: {
  
			diffuse: { value: new Color( 0xeeeeee ) },
			opacity: { value: 1.0 },
			size: { value: 1.0 },
			scale: { value: 1.0 },
			map: { value: null },
			uvTransform: { value: new Matrix3() }
  
		}
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 */
  
	var ShaderLib = {
  
		basic: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.fog
			] ),
  
			vertexShader: ShaderChunk.meshbasic_vert,
			fragmentShader: ShaderChunk.meshbasic_frag
  
		},
  
		lambert: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) }
				}
			] ),
  
			vertexShader: ShaderChunk.meshlambert_vert,
			fragmentShader: ShaderChunk.meshlambert_frag
  
		},
  
		phong: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				UniformsLib.gradientmap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) },
					specular: { value: new Color( 0x111111 ) },
					shininess: { value: 30 }
				}
			] ),
  
			vertexShader: ShaderChunk.meshphong_vert,
			fragmentShader: ShaderChunk.meshphong_frag
  
		},
  
		standard: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				UniformsLib.roughnessmap,
				UniformsLib.metalnessmap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) },
					roughness: { value: 0.5 },
					metalness: { value: 0.5 },
					envMapIntensity: { value: 1 } // temporary
				}
			] ),
  
			vertexShader: ShaderChunk.meshphysical_vert,
			fragmentShader: ShaderChunk.meshphysical_frag
  
		},
  
		points: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.points,
				UniformsLib.fog
			] ),
  
			vertexShader: ShaderChunk.points_vert,
			fragmentShader: ShaderChunk.points_frag
  
		},
  
		dashed: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.fog,
				{
					scale: { value: 1 },
					dashSize: { value: 1 },
					totalSize: { value: 2 }
				}
			] ),
  
			vertexShader: ShaderChunk.linedashed_vert,
			fragmentShader: ShaderChunk.linedashed_frag
  
		},
  
		depth: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.displacementmap
			] ),
  
			vertexShader: ShaderChunk.depth_vert,
			fragmentShader: ShaderChunk.depth_frag
  
		},
  
		normal: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				{
					opacity: { value: 1.0 }
				}
			] ),
  
			vertexShader: ShaderChunk.normal_vert,
			fragmentShader: ShaderChunk.normal_frag
  
		},
  
		/* -------------------------------------------------------------------------
		//	Cube map shader
		 ------------------------------------------------------------------------- */
  
		cube: {
  
			uniforms: {
				tCube: { value: null },
				tFlip: { value: - 1 },
				opacity: { value: 1.0 }
			},
  
			vertexShader: ShaderChunk.cube_vert,
			fragmentShader: ShaderChunk.cube_frag
  
		},
  
		equirect: {
  
			uniforms: {
				tEquirect: { value: null },
			},
  
			vertexShader: ShaderChunk.equirect_vert,
			fragmentShader: ShaderChunk.equirect_frag
  
		},
  
		distanceRGBA: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.displacementmap,
				{
					referencePosition: { value: new Vector3() },
					nearDistance: { value: 1 },
					farDistance: { value: 1000 }
				}
			] ),
  
			vertexShader: ShaderChunk.distanceRGBA_vert,
			fragmentShader: ShaderChunk.distanceRGBA_frag
  
		},
  
		shadow: {
  
			uniforms: UniformsUtils.merge( [
				UniformsLib.lights,
				UniformsLib.fog,
				{
					color: { value: new Color( 0x00000 ) },
					opacity: { value: 1.0 }
				},
			] ),
  
			vertexShader: ShaderChunk.shadow_vert,
			fragmentShader: ShaderChunk.shadow_frag
  
		}
  
	};
  
	ShaderLib.physical = {
  
		uniforms: UniformsUtils.merge( [
			ShaderLib.standard.uniforms,
			{
				clearCoat: { value: 0 },
				clearCoatRoughness: { value: 0 }
			}
		] ),
  
		vertexShader: ShaderChunk.meshphysical_vert,
		fragmentShader: ShaderChunk.meshphysical_frag
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLAnimation() {
  
		var context = null;
		var isAnimating = false;
		var animationLoop = null;
  
		function onAnimationFrame( time, frame ) {
  
			if ( isAnimating === false ) return;
  
			animationLoop( time, frame );
  
			context.requestAnimationFrame( onAnimationFrame );
  
		}
  
		return {
  
			start: function () {
  
				if ( isAnimating === true ) return;
				if ( animationLoop === null ) return;
  
				context.requestAnimationFrame( onAnimationFrame );
  
				isAnimating = true;
  
			},
  
			stop: function () {
  
				isAnimating = false;
  
			},
  
			setAnimationLoop: function ( callback ) {
  
				animationLoop = callback;
  
			},
  
			setContext: function ( value ) {
  
				context = value;
  
			}
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLAttributes( gl ) {
  
		var buffers = new WeakMap();
  
		function createBuffer( attribute, bufferType ) {
  
			var array = attribute.array;
			var usage = attribute.dynamic ? gl.DYNAMIC_DRAW : gl.STATIC_DRAW;
  
			var buffer = gl.createBuffer();
  
			gl.bindBuffer( bufferType, buffer );
			gl.bufferData( bufferType, array, usage );
  
			attribute.onUploadCallback();
  
			var type = gl.FLOAT;
  
			if ( array instanceof Float32Array ) {
  
				type = gl.FLOAT;
  
			} else if ( array instanceof Float64Array ) {
  
				console.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' );
  
			} else if ( array instanceof Uint16Array ) {
  
				type = gl.UNSIGNED_SHORT;
  
			} else if ( array instanceof Int16Array ) {
  
				type = gl.SHORT;
  
			} else if ( array instanceof Uint32Array ) {
  
				type = gl.UNSIGNED_INT;
  
			} else if ( array instanceof Int32Array ) {
  
				type = gl.INT;
  
			} else if ( array instanceof Int8Array ) {
  
				type = gl.BYTE;
  
			} else if ( array instanceof Uint8Array ) {
  
				type = gl.UNSIGNED_BYTE;
  
			}
  
			return {
				buffer: buffer,
				type: type,
				bytesPerElement: array.BYTES_PER_ELEMENT,
				version: attribute.version
			};
  
		}
  
		function updateBuffer( buffer, attribute, bufferType ) {
  
			var array = attribute.array;
			var updateRange = attribute.updateRange;
  
			gl.bindBuffer( bufferType, buffer );
  
			if ( attribute.dynamic === false ) {
  
				gl.bufferData( bufferType, array, gl.STATIC_DRAW );
  
			} else if ( updateRange.count === - 1 ) {
  
				// Not using update ranges
  
				gl.bufferSubData( bufferType, 0, array );
  
			} else if ( updateRange.count === 0 ) {
  
				console.error( 'THREE.WebGLObjects.updateBuffer: dynamic THREE.BufferAttribute marked as needsUpdate but updateRange.count is 0, ensure you are using set methods or updating manually.' );
  
			} else {
  
				gl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,
					array.subarray( updateRange.offset, updateRange.offset + updateRange.count ) );
  
				updateRange.count = - 1; // reset range
  
			}
  
		}
  
		//
  
		function get( attribute ) {
  
			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;
  
			return buffers.get( attribute );
  
		}
  
		function remove( attribute ) {
  
			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;
  
			var data = buffers.get( attribute );
  
			if ( data ) {
  
				gl.deleteBuffer( data.buffer );
  
				buffers.delete( attribute );
  
			}
  
		}
  
		function update( attribute, bufferType ) {
  
			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;
  
			var data = buffers.get( attribute );
  
			if ( data === undefined ) {
  
				buffers.set( attribute, createBuffer( attribute, bufferType ) );
  
			} else if ( data.version < attribute.version ) {
  
				updateBuffer( data.buffer, attribute, bufferType );
  
				data.version = attribute.version;
  
			}
  
		}
  
		return {
  
			get: get,
			remove: remove,
			update: update
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 */
  
	function Euler( x, y, z, order ) {
  
		this._x = x || 0;
		this._y = y || 0;
		this._z = z || 0;
		this._order = order || Euler.DefaultOrder;
  
	}
  
	Euler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];
  
	Euler.DefaultOrder = 'XYZ';
  
	Object.defineProperties( Euler.prototype, {
  
		x: {
  
			get: function () {
  
				return this._x;
  
			},
  
			set: function ( value ) {
  
				this._x = value;
				this.onChangeCallback();
  
			}
  
		},
  
		y: {
  
			get: function () {
  
				return this._y;
  
			},
  
			set: function ( value ) {
  
				this._y = value;
				this.onChangeCallback();
  
			}
  
		},
  
		z: {
  
			get: function () {
  
				return this._z;
  
			},
  
			set: function ( value ) {
  
				this._z = value;
				this.onChangeCallback();
  
			}
  
		},
  
		order: {
  
			get: function () {
  
				return this._order;
  
			},
  
			set: function ( value ) {
  
				this._order = value;
				this.onChangeCallback();
  
			}
  
		}
  
	} );
  
	Object.assign( Euler.prototype, {
  
		isEuler: true,
  
		set: function ( x, y, z, order ) {
  
			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order || this._order;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor( this._x, this._y, this._z, this._order );
  
		},
  
		copy: function ( euler ) {
  
			this._x = euler._x;
			this._y = euler._y;
			this._z = euler._z;
			this._order = euler._order;
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		setFromRotationMatrix: function ( m, order, update ) {
  
			var clamp = _Math.clamp;
  
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
  
			var te = m.elements;
			var m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];
			var m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];
			var m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];
  
			order = order || this._order;
  
			if ( order === 'XYZ' ) {
  
				this._y = Math.asin( clamp( m13, - 1, 1 ) );
  
				if ( Math.abs( m13 ) < 0.99999 ) {
  
					this._x = Math.atan2( - m23, m33 );
					this._z = Math.atan2( - m12, m11 );
  
				} else {
  
					this._x = Math.atan2( m32, m22 );
					this._z = 0;
  
				}
  
			} else if ( order === 'YXZ' ) {
  
				this._x = Math.asin( - clamp( m23, - 1, 1 ) );
  
				if ( Math.abs( m23 ) < 0.99999 ) {
  
					this._y = Math.atan2( m13, m33 );
					this._z = Math.atan2( m21, m22 );
  
				} else {
  
					this._y = Math.atan2( - m31, m11 );
					this._z = 0;
  
				}
  
			} else if ( order === 'ZXY' ) {
  
				this._x = Math.asin( clamp( m32, - 1, 1 ) );
  
				if ( Math.abs( m32 ) < 0.99999 ) {
  
					this._y = Math.atan2( - m31, m33 );
					this._z = Math.atan2( - m12, m22 );
  
				} else {
  
					this._y = 0;
					this._z = Math.atan2( m21, m11 );
  
				}
  
			} else if ( order === 'ZYX' ) {
  
				this._y = Math.asin( - clamp( m31, - 1, 1 ) );
  
				if ( Math.abs( m31 ) < 0.99999 ) {
  
					this._x = Math.atan2( m32, m33 );
					this._z = Math.atan2( m21, m11 );
  
				} else {
  
					this._x = 0;
					this._z = Math.atan2( - m12, m22 );
  
				}
  
			} else if ( order === 'YZX' ) {
  
				this._z = Math.asin( clamp( m21, - 1, 1 ) );
  
				if ( Math.abs( m21 ) < 0.99999 ) {
  
					this._x = Math.atan2( - m23, m22 );
					this._y = Math.atan2( - m31, m11 );
  
				} else {
  
					this._x = 0;
					this._y = Math.atan2( m13, m33 );
  
				}
  
			} else if ( order === 'XZY' ) {
  
				this._z = Math.asin( - clamp( m12, - 1, 1 ) );
  
				if ( Math.abs( m12 ) < 0.99999 ) {
  
					this._x = Math.atan2( m32, m22 );
					this._y = Math.atan2( m13, m11 );
  
				} else {
  
					this._x = Math.atan2( - m23, m33 );
					this._y = 0;
  
				}
  
			} else {
  
				console.warn( 'THREE.Euler: .setFromRotationMatrix() given unsupported order: ' + order );
  
			}
  
			this._order = order;
  
			if ( update !== false ) this.onChangeCallback();
  
			return this;
  
		},
  
		setFromQuaternion: function () {
  
			var matrix = new Matrix4();
  
			return function setFromQuaternion( q, order, update ) {
  
				matrix.makeRotationFromQuaternion( q );
  
				return this.setFromRotationMatrix( matrix, order, update );
  
			};
  
		}(),
  
		setFromVector3: function ( v, order ) {
  
			return this.set( v.x, v.y, v.z, order || this._order );
  
		},
  
		reorder: function () {
  
			// WARNING: this discards revolution information -bhouston
  
			var q = new Quaternion();
  
			return function reorder( newOrder ) {
  
				q.setFromEuler( this );
  
				return this.setFromQuaternion( q, newOrder );
  
			};
  
		}(),
  
		equals: function ( euler ) {
  
			return ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );
  
		},
  
		fromArray: function ( array ) {
  
			this._x = array[ 0 ];
			this._y = array[ 1 ];
			this._z = array[ 2 ];
			if ( array[ 3 ] !== undefined ) this._order = array[ 3 ];
  
			this.onChangeCallback();
  
			return this;
  
		},
  
		toArray: function ( array, offset ) {
  
			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;
  
			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._order;
  
			return array;
  
		},
  
		toVector3: function ( optionalResult ) {
  
			if ( optionalResult ) {
  
				return optionalResult.set( this._x, this._y, this._z );
  
			} else {
  
				return new Vector3( this._x, this._y, this._z );
  
			}
  
		},
  
		onChange: function ( callback ) {
  
			this.onChangeCallback = callback;
  
			return this;
  
		},
  
		onChangeCallback: function () {}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Layers() {
  
		this.mask = 1 | 0;
  
	}
  
	Object.assign( Layers.prototype, {
  
		set: function ( channel ) {
  
			this.mask = 1 << channel | 0;
  
		},
  
		enable: function ( channel ) {
  
			this.mask |= 1 << channel | 0;
  
		},
  
		toggle: function ( channel ) {
  
			this.mask ^= 1 << channel | 0;
  
		},
  
		disable: function ( channel ) {
  
			this.mask &= ~ ( 1 << channel | 0 );
  
		},
  
		test: function ( layers ) {
  
			return ( this.mask & layers.mask ) !== 0;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author elephantatwork / www.elephantatwork.ch
	 */
  
	var object3DId = 0;
  
	function Object3D() {
  
		Object.defineProperty( this, 'id', { value: object3DId ++ } );
  
		this.uuid = _Math.generateUUID();
  
		this.name = '';
		this.type = 'Object3D';
  
		this.parent = null;
		this.children = [];
  
		this.up = Object3D.DefaultUp.clone();
  
		var position = new Vector3();
		var rotation = new Euler();
		var quaternion = new Quaternion();
		var scale = new Vector3( 1, 1, 1 );
  
		function onRotationChange() {
  
			quaternion.setFromEuler( rotation, false );
  
		}
  
		function onQuaternionChange() {
  
			rotation.setFromQuaternion( quaternion, undefined, false );
  
		}
  
		rotation.onChange( onRotationChange );
		quaternion.onChange( onQuaternionChange );
  
		Object.defineProperties( this, {
			position: {
				enumerable: true,
				value: position
			},
			rotation: {
				enumerable: true,
				value: rotation
			},
			quaternion: {
				enumerable: true,
				value: quaternion
			},
			scale: {
				enumerable: true,
				value: scale
			},
			modelViewMatrix: {
				value: new Matrix4()
			},
			normalMatrix: {
				value: new Matrix3()
			}
		} );
  
		this.matrix = new Matrix4();
		this.matrixWorld = new Matrix4();
  
		this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
		this.matrixWorldNeedsUpdate = false;
  
		this.layers = new Layers();
		this.visible = true;
  
		this.castShadow = false;
		this.receiveShadow = false;
  
		this.frustumCulled = true;
		this.renderOrder = 0;
  
		this.userData = {};
  
	}
  
	Object3D.DefaultUp = new Vector3( 0, 1, 0 );
	Object3D.DefaultMatrixAutoUpdate = true;
  
	Object3D.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: Object3D,
  
		isObject3D: true,
  
		onBeforeRender: function () {},
		onAfterRender: function () {},
  
		applyMatrix: function ( matrix ) {
  
			this.matrix.multiplyMatrices( matrix, this.matrix );
  
			this.matrix.decompose( this.position, this.quaternion, this.scale );
  
		},
  
		applyQuaternion: function ( q ) {
  
			this.quaternion.premultiply( q );
  
			return this;
  
		},
  
		setRotationFromAxisAngle: function ( axis, angle ) {
  
			// assumes axis is normalized
  
			this.quaternion.setFromAxisAngle( axis, angle );
  
		},
  
		setRotationFromEuler: function ( euler ) {
  
			this.quaternion.setFromEuler( euler, true );
  
		},
  
		setRotationFromMatrix: function ( m ) {
  
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
  
			this.quaternion.setFromRotationMatrix( m );
  
		},
  
		setRotationFromQuaternion: function ( q ) {
  
			// assumes q is normalized
  
			this.quaternion.copy( q );
  
		},
  
		rotateOnAxis: function () {
  
			// rotate object on axis in object space
			// axis is assumed to be normalized
  
			var q1 = new Quaternion();
  
			return function rotateOnAxis( axis, angle ) {
  
				q1.setFromAxisAngle( axis, angle );
  
				this.quaternion.multiply( q1 );
  
				return this;
  
			};
  
		}(),
  
		rotateOnWorldAxis: function () {
  
			// rotate object on axis in world space
			// axis is assumed to be normalized
			// method assumes no rotated parent
  
			var q1 = new Quaternion();
  
			return function rotateOnWorldAxis( axis, angle ) {
  
				q1.setFromAxisAngle( axis, angle );
  
				this.quaternion.premultiply( q1 );
  
				return this;
  
			};
  
		}(),
  
		rotateX: function () {
  
			var v1 = new Vector3( 1, 0, 0 );
  
			return function rotateX( angle ) {
  
				return this.rotateOnAxis( v1, angle );
  
			};
  
		}(),
  
		rotateY: function () {
  
			var v1 = new Vector3( 0, 1, 0 );
  
			return function rotateY( angle ) {
  
				return this.rotateOnAxis( v1, angle );
  
			};
  
		}(),
  
		rotateZ: function () {
  
			var v1 = new Vector3( 0, 0, 1 );
  
			return function rotateZ( angle ) {
  
				return this.rotateOnAxis( v1, angle );
  
			};
  
		}(),
  
		translateOnAxis: function () {
  
			// translate object by distance along axis in object space
			// axis is assumed to be normalized
  
			var v1 = new Vector3();
  
			return function translateOnAxis( axis, distance ) {
  
				v1.copy( axis ).applyQuaternion( this.quaternion );
  
				this.position.add( v1.multiplyScalar( distance ) );
  
				return this;
  
			};
  
		}(),
  
		translateX: function () {
  
			var v1 = new Vector3( 1, 0, 0 );
  
			return function translateX( distance ) {
  
				return this.translateOnAxis( v1, distance );
  
			};
  
		}(),
  
		translateY: function () {
  
			var v1 = new Vector3( 0, 1, 0 );
  
			return function translateY( distance ) {
  
				return this.translateOnAxis( v1, distance );
  
			};
  
		}(),
  
		translateZ: function () {
  
			var v1 = new Vector3( 0, 0, 1 );
  
			return function translateZ( distance ) {
  
				return this.translateOnAxis( v1, distance );
  
			};
  
		}(),
  
		localToWorld: function ( vector ) {
  
			return vector.applyMatrix4( this.matrixWorld );
  
		},
  
		worldToLocal: function () {
  
			var m1 = new Matrix4();
  
			return function worldToLocal( vector ) {
  
				return vector.applyMatrix4( m1.getInverse( this.matrixWorld ) );
  
			};
  
		}(),
  
		lookAt: function () {
  
			// This method does not support objects with rotated and/or translated parent(s)
  
			var m1 = new Matrix4();
			var vector = new Vector3();
  
			return function lookAt( x, y, z ) {
  
				if ( x.isVector3 ) {
  
					vector.copy( x );
  
				} else {
  
					vector.set( x, y, z );
  
				}
  
				if ( this.isCamera ) {
  
					m1.lookAt( this.position, vector, this.up );
  
				} else {
  
					m1.lookAt( vector, this.position, this.up );
  
				}
  
				this.quaternion.setFromRotationMatrix( m1 );
  
			};
  
		}(),
  
		add: function ( object ) {
  
			if ( arguments.length > 1 ) {
  
				for ( var i = 0; i < arguments.length; i ++ ) {
  
					this.add( arguments[ i ] );
  
				}
  
				return this;
  
			}
  
			if ( object === this ) {
  
				console.error( "THREE.Object3D.add: object can't be added as a child of itself.", object );
				return this;
  
			}
  
			if ( ( object && object.isObject3D ) ) {
  
				if ( object.parent !== null ) {
  
					object.parent.remove( object );
  
				}
  
				object.parent = this;
				object.dispatchEvent( { type: 'added' } );
  
				this.children.push( object );
  
			} else {
  
				console.error( "THREE.Object3D.add: object not an instance of THREE.Object3D.", object );
  
			}
  
			return this;
  
		},
  
		remove: function ( object ) {
  
			if ( arguments.length > 1 ) {
  
				for ( var i = 0; i < arguments.length; i ++ ) {
  
					this.remove( arguments[ i ] );
  
				}
  
				return this;
  
			}
  
			var index = this.children.indexOf( object );
  
			if ( index !== - 1 ) {
  
				object.parent = null;
  
				object.dispatchEvent( { type: 'removed' } );
  
				this.children.splice( index, 1 );
  
			}
  
			return this;
  
		},
  
		getObjectById: function ( id ) {
  
			return this.getObjectByProperty( 'id', id );
  
		},
  
		getObjectByName: function ( name ) {
  
			return this.getObjectByProperty( 'name', name );
  
		},
  
		getObjectByProperty: function ( name, value ) {
  
			if ( this[ name ] === value ) return this;
  
			for ( var i = 0, l = this.children.length; i < l; i ++ ) {
  
				var child = this.children[ i ];
				var object = child.getObjectByProperty( name, value );
  
				if ( object !== undefined ) {
  
					return object;
  
				}
  
			}
  
			return undefined;
  
		},
  
		getWorldPosition: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Object3D: .getWorldPosition() target is now required' );
				target = new Vector3();
  
			}
  
			this.updateMatrixWorld( true );
  
			return target.setFromMatrixPosition( this.matrixWorld );
  
		},
  
		getWorldQuaternion: function () {
  
			var position = new Vector3();
			var scale = new Vector3();
  
			return function getWorldQuaternion( target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Object3D: .getWorldQuaternion() target is now required' );
					target = new Quaternion();
  
				}
  
				this.updateMatrixWorld( true );
  
				this.matrixWorld.decompose( position, target, scale );
  
				return target;
  
			};
  
		}(),
  
		getWorldScale: function () {
  
			var position = new Vector3();
			var quaternion = new Quaternion();
  
			return function getWorldScale( target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Object3D: .getWorldScale() target is now required' );
					target = new Vector3();
  
				}
  
				this.updateMatrixWorld( true );
  
				this.matrixWorld.decompose( position, quaternion, target );
  
				return target;
  
			};
  
		}(),
  
		getWorldDirection: function () {
  
			var quaternion = new Quaternion();
  
			return function getWorldDirection( target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Object3D: .getWorldDirection() target is now required' );
					target = new Vector3();
  
				}
  
				this.getWorldQuaternion( quaternion );
  
				return target.set( 0, 0, 1 ).applyQuaternion( quaternion );
  
			};
  
		}(),
  
		raycast: function () {},
  
		traverse: function ( callback ) {
  
			callback( this );
  
			var children = this.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				children[ i ].traverse( callback );
  
			}
  
		},
  
		traverseVisible: function ( callback ) {
  
			if ( this.visible === false ) return;
  
			callback( this );
  
			var children = this.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				children[ i ].traverseVisible( callback );
  
			}
  
		},
  
		traverseAncestors: function ( callback ) {
  
			var parent = this.parent;
  
			if ( parent !== null ) {
  
				callback( parent );
  
				parent.traverseAncestors( callback );
  
			}
  
		},
  
		updateMatrix: function () {
  
			this.matrix.compose( this.position, this.quaternion, this.scale );
  
			this.matrixWorldNeedsUpdate = true;
  
		},
  
		updateMatrixWorld: function ( force ) {
  
			if ( this.matrixAutoUpdate ) this.updateMatrix();
  
			if ( this.matrixWorldNeedsUpdate || force ) {
  
				if ( this.parent === null ) {
  
					this.matrixWorld.copy( this.matrix );
  
				} else {
  
					this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );
  
				}
  
				this.matrixWorldNeedsUpdate = false;
  
				force = true;
  
			}
  
			// update children
  
			var children = this.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				children[ i ].updateMatrixWorld( force );
  
			}
  
		},
  
		toJSON: function ( meta ) {
  
			// meta is a string when called from JSON.stringify
			var isRootObject = ( meta === undefined || typeof meta === 'string' );
  
			var output = {};
  
			// meta is a hash used to collect geometries, materials.
			// not providing it implies that this is the root object
			// being serialized.
			if ( isRootObject ) {
  
				// initialize meta obj
				meta = {
					geometries: {},
					materials: {},
					textures: {},
					images: {},
					shapes: {}
				};
  
				output.metadata = {
					version: 4.5,
					type: 'Object',
					generator: 'Object3D.toJSON'
				};
  
			}
  
			// standard Object3D serialization
  
			var object = {};
  
			object.uuid = this.uuid;
			object.type = this.type;
  
			if ( this.name !== '' ) object.name = this.name;
			if ( this.castShadow === true ) object.castShadow = true;
			if ( this.receiveShadow === true ) object.receiveShadow = true;
			if ( this.visible === false ) object.visible = false;
			if ( this.frustumCulled === false ) object.frustumCulled = false;
			if ( this.renderOrder !== 0 ) object.renderOrder = this.renderOrder;
			if ( JSON.stringify( this.userData ) !== '{}' ) object.userData = this.userData;
  
			object.matrix = this.matrix.toArray();
  
			if ( this.matrixAutoUpdate === false ) object.matrixAutoUpdate = false;
  
			//
  
			function serialize( library, element ) {
  
				if ( library[ element.uuid ] === undefined ) {
  
					library[ element.uuid ] = element.toJSON( meta );
  
				}
  
				return element.uuid;
  
			}
  
			if ( this.geometry !== undefined ) {
  
				object.geometry = serialize( meta.geometries, this.geometry );
  
				var parameters = this.geometry.parameters;
  
				if ( parameters !== undefined && parameters.shapes !== undefined ) {
  
					var shapes = parameters.shapes;
  
					if ( Array.isArray( shapes ) ) {
  
						for ( var i = 0, l = shapes.length; i < l; i ++ ) {
  
							var shape = shapes[ i ];
  
							serialize( meta.shapes, shape );
  
						}
  
					} else {
  
						serialize( meta.shapes, shapes );
  
					}
  
				}
  
			}
  
			if ( this.material !== undefined ) {
  
				if ( Array.isArray( this.material ) ) {
  
					var uuids = [];
  
					for ( var i = 0, l = this.material.length; i < l; i ++ ) {
  
						uuids.push( serialize( meta.materials, this.material[ i ] ) );
  
					}
  
					object.material = uuids;
  
				} else {
  
					object.material = serialize( meta.materials, this.material );
  
				}
  
			}
  
			//
  
			if ( this.children.length > 0 ) {
  
				object.children = [];
  
				for ( var i = 0; i < this.children.length; i ++ ) {
  
					object.children.push( this.children[ i ].toJSON( meta ).object );
  
				}
  
			}
  
			if ( isRootObject ) {
  
				var geometries = extractFromCache( meta.geometries );
				var materials = extractFromCache( meta.materials );
				var textures = extractFromCache( meta.textures );
				var images = extractFromCache( meta.images );
				var shapes = extractFromCache( meta.shapes );
  
				if ( geometries.length > 0 ) output.geometries = geometries;
				if ( materials.length > 0 ) output.materials = materials;
				if ( textures.length > 0 ) output.textures = textures;
				if ( images.length > 0 ) output.images = images;
				if ( shapes.length > 0 ) output.shapes = shapes;
  
			}
  
			output.object = object;
  
			return output;
  
			// extract data from the cache hash
			// remove metadata on each item
			// and return as array
			function extractFromCache( cache ) {
  
				var values = [];
				for ( var key in cache ) {
  
					var data = cache[ key ];
					delete data.metadata;
					values.push( data );
  
				}
				return values;
  
			}
  
		},
  
		clone: function ( recursive ) {
  
			return new this.constructor().copy( this, recursive );
  
		},
  
		copy: function ( source, recursive ) {
  
			if ( recursive === undefined ) recursive = true;
  
			this.name = source.name;
  
			this.up.copy( source.up );
  
			this.position.copy( source.position );
			this.quaternion.copy( source.quaternion );
			this.scale.copy( source.scale );
  
			this.matrix.copy( source.matrix );
			this.matrixWorld.copy( source.matrixWorld );
  
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;
  
			this.layers.mask = source.layers.mask;
			this.visible = source.visible;
  
			this.castShadow = source.castShadow;
			this.receiveShadow = source.receiveShadow;
  
			this.frustumCulled = source.frustumCulled;
			this.renderOrder = source.renderOrder;
  
			this.userData = JSON.parse( JSON.stringify( source.userData ) );
  
			if ( recursive === true ) {
  
				for ( var i = 0; i < source.children.length; i ++ ) {
  
					var child = source.children[ i ];
					this.add( child.clone() );
  
				}
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author WestLangley / http://github.com/WestLangley
	*/
  
	function Camera() {
  
		Object3D.call( this );
  
		this.type = 'Camera';
  
		this.matrixWorldInverse = new Matrix4();
		this.projectionMatrix = new Matrix4();
  
	}
  
	Camera.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Camera,
  
		isCamera: true,
  
		copy: function ( source, recursive ) {
  
			Object3D.prototype.copy.call( this, source, recursive );
  
			this.matrixWorldInverse.copy( source.matrixWorldInverse );
			this.projectionMatrix.copy( source.projectionMatrix );
  
			return this;
  
		},
  
		getWorldDirection: function () {
  
			var quaternion = new Quaternion();
  
			return function getWorldDirection( target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Camera: .getWorldDirection() target is now required' );
					target = new Vector3();
  
				}
  
				this.getWorldQuaternion( quaternion );
  
				return target.set( 0, 0, - 1 ).applyQuaternion( quaternion );
  
			};
  
		}(),
  
		updateMatrixWorld: function ( force ) {
  
			Object3D.prototype.updateMatrixWorld.call( this, force );
  
			this.matrixWorldInverse.getInverse( this.matrixWorld );
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author arose / http://github.com/arose
	 */
  
	function OrthographicCamera( left, right, top, bottom, near, far ) {
  
		Camera.call( this );
  
		this.type = 'OrthographicCamera';
  
		this.zoom = 1;
		this.view = null;
  
		this.left = left;
		this.right = right;
		this.top = top;
		this.bottom = bottom;
  
		this.near = ( near !== undefined ) ? near : 0.1;
		this.far = ( far !== undefined ) ? far : 2000;
  
		this.updateProjectionMatrix();
  
	}
  
	OrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {
  
		constructor: OrthographicCamera,
  
		isOrthographicCamera: true,
  
		copy: function ( source, recursive ) {
  
			Camera.prototype.copy.call( this, source, recursive );
  
			this.left = source.left;
			this.right = source.right;
			this.top = source.top;
			this.bottom = source.bottom;
			this.near = source.near;
			this.far = source.far;
  
			this.zoom = source.zoom;
			this.view = source.view === null ? null : Object.assign( {}, source.view );
  
			return this;
  
		},
  
		setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {
  
			if ( this.view === null ) {
  
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
  
			}
  
			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
  
			this.updateProjectionMatrix();
  
		},
  
		clearViewOffset: function () {
  
			if ( this.view !== null ) {
  
				this.view.enabled = false;
  
			}
  
			this.updateProjectionMatrix();
  
		},
  
		updateProjectionMatrix: function () {
  
			var dx = ( this.right - this.left ) / ( 2 * this.zoom );
			var dy = ( this.top - this.bottom ) / ( 2 * this.zoom );
			var cx = ( this.right + this.left ) / 2;
			var cy = ( this.top + this.bottom ) / 2;
  
			var left = cx - dx;
			var right = cx + dx;
			var top = cy + dy;
			var bottom = cy - dy;
  
			if ( this.view !== null && this.view.enabled ) {
  
				var zoomW = this.zoom / ( this.view.width / this.view.fullWidth );
				var zoomH = this.zoom / ( this.view.height / this.view.fullHeight );
				var scaleW = ( this.right - this.left ) / this.view.width;
				var scaleH = ( this.top - this.bottom ) / this.view.height;
  
				left += scaleW * ( this.view.offsetX / zoomW );
				right = left + scaleW * ( this.view.width / zoomW );
				top -= scaleH * ( this.view.offsetY / zoomH );
				bottom = top - scaleH * ( this.view.height / zoomH );
  
			}
  
			this.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );
  
		},
  
		toJSON: function ( meta ) {
  
			var data = Object3D.prototype.toJSON.call( this, meta );
  
			data.object.zoom = this.zoom;
			data.object.left = this.left;
			data.object.right = this.right;
			data.object.top = this.top;
			data.object.bottom = this.bottom;
			data.object.near = this.near;
			data.object.far = this.far;
  
			if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );
  
			return data;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Face3( a, b, c, normal, color, materialIndex ) {
  
		this.a = a;
		this.b = b;
		this.c = c;
  
		this.normal = ( normal && normal.isVector3 ) ? normal : new Vector3();
		this.vertexNormals = Array.isArray( normal ) ? normal : [];
  
		this.color = ( color && color.isColor ) ? color : new Color();
		this.vertexColors = Array.isArray( color ) ? color : [];
  
		this.materialIndex = materialIndex !== undefined ? materialIndex : 0;
  
	}
  
	Object.assign( Face3.prototype, {
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( source ) {
  
			this.a = source.a;
			this.b = source.b;
			this.c = source.c;
  
			this.normal.copy( source.normal );
			this.color.copy( source.color );
  
			this.materialIndex = source.materialIndex;
  
			for ( var i = 0, il = source.vertexNormals.length; i < il; i ++ ) {
  
				this.vertexNormals[ i ] = source.vertexNormals[ i ].clone();
  
			}
  
			for ( var i = 0, il = source.vertexColors.length; i < il; i ++ ) {
  
				this.vertexColors[ i ] = source.vertexColors[ i ].clone();
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author kile / http://kile.stravaganza.org/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author bhouston / http://clara.io
	 */
  
	var geometryId = 0; // Geometry uses even numbers as Id
  
	function Geometry() {
  
		Object.defineProperty( this, 'id', { value: geometryId += 2 } );
  
		this.uuid = _Math.generateUUID();
  
		this.name = '';
		this.type = 'Geometry';
  
		this.vertices = [];
		this.colors = [];
		this.faces = [];
		this.faceVertexUvs = [[]];
  
		this.morphTargets = [];
		this.morphNormals = [];
  
		this.skinWeights = [];
		this.skinIndices = [];
  
		this.lineDistances = [];
  
		this.boundingBox = null;
		this.boundingSphere = null;
  
		// update flags
  
		this.elementsNeedUpdate = false;
		this.verticesNeedUpdate = false;
		this.uvsNeedUpdate = false;
		this.normalsNeedUpdate = false;
		this.colorsNeedUpdate = false;
		this.lineDistancesNeedUpdate = false;
		this.groupsNeedUpdate = false;
  
	}
  
	Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: Geometry,
  
		isGeometry: true,
  
		applyMatrix: function ( matrix ) {
  
			var normalMatrix = new Matrix3().getNormalMatrix( matrix );
  
			for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {
  
				var vertex = this.vertices[ i ];
				vertex.applyMatrix4( matrix );
  
			}
  
			for ( var i = 0, il = this.faces.length; i < il; i ++ ) {
  
				var face = this.faces[ i ];
				face.normal.applyMatrix3( normalMatrix ).normalize();
  
				for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {
  
					face.vertexNormals[ j ].applyMatrix3( normalMatrix ).normalize();
  
				}
  
			}
  
			if ( this.boundingBox !== null ) {
  
				this.computeBoundingBox();
  
			}
  
			if ( this.boundingSphere !== null ) {
  
				this.computeBoundingSphere();
  
			}
  
			this.verticesNeedUpdate = true;
			this.normalsNeedUpdate = true;
  
			return this;
  
		},
  
		rotateX: function () {
  
			// rotate geometry around world x-axis
  
			var m1 = new Matrix4();
  
			return function rotateX( angle ) {
  
				m1.makeRotationX( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		rotateY: function () {
  
			// rotate geometry around world y-axis
  
			var m1 = new Matrix4();
  
			return function rotateY( angle ) {
  
				m1.makeRotationY( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		rotateZ: function () {
  
			// rotate geometry around world z-axis
  
			var m1 = new Matrix4();
  
			return function rotateZ( angle ) {
  
				m1.makeRotationZ( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		translate: function () {
  
			// translate geometry
  
			var m1 = new Matrix4();
  
			return function translate( x, y, z ) {
  
				m1.makeTranslation( x, y, z );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		scale: function () {
  
			// scale geometry
  
			var m1 = new Matrix4();
  
			return function scale( x, y, z ) {
  
				m1.makeScale( x, y, z );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		lookAt: function () {
  
			var obj = new Object3D();
  
			return function lookAt( vector ) {
  
				obj.lookAt( vector );
  
				obj.updateMatrix();
  
				this.applyMatrix( obj.matrix );
  
			};
  
		}(),
  
		fromBufferGeometry: function ( geometry ) {
  
			var scope = this;
  
			var indices = geometry.index !== null ? geometry.index.array : undefined;
			var attributes = geometry.attributes;
  
			var positions = attributes.position.array;
			var normals = attributes.normal !== undefined ? attributes.normal.array : undefined;
			var colors = attributes.color !== undefined ? attributes.color.array : undefined;
			var uvs = attributes.uv !== undefined ? attributes.uv.array : undefined;
			var uvs2 = attributes.uv2 !== undefined ? attributes.uv2.array : undefined;
  
			if ( uvs2 !== undefined ) this.faceVertexUvs[ 1 ] = [];
  
			var tempNormals = [];
			var tempUVs = [];
			var tempUVs2 = [];
  
			for ( var i = 0, j = 0; i < positions.length; i += 3, j += 2 ) {
  
				scope.vertices.push( new Vector3( positions[ i ], positions[ i + 1 ], positions[ i + 2 ] ) );
  
				if ( normals !== undefined ) {
  
					tempNormals.push( new Vector3( normals[ i ], normals[ i + 1 ], normals[ i + 2 ] ) );
  
				}
  
				if ( colors !== undefined ) {
  
					scope.colors.push( new Color( colors[ i ], colors[ i + 1 ], colors[ i + 2 ] ) );
  
				}
  
				if ( uvs !== undefined ) {
  
					tempUVs.push( new Vector2( uvs[ j ], uvs[ j + 1 ] ) );
  
				}
  
				if ( uvs2 !== undefined ) {
  
					tempUVs2.push( new Vector2( uvs2[ j ], uvs2[ j + 1 ] ) );
  
				}
  
			}
  
			function addFace( a, b, c, materialIndex ) {
  
				var vertexNormals = normals !== undefined ? [ tempNormals[ a ].clone(), tempNormals[ b ].clone(), tempNormals[ c ].clone() ] : [];
				var vertexColors = colors !== undefined ? [ scope.colors[ a ].clone(), scope.colors[ b ].clone(), scope.colors[ c ].clone() ] : [];
  
				var face = new Face3( a, b, c, vertexNormals, vertexColors, materialIndex );
  
				scope.faces.push( face );
  
				if ( uvs !== undefined ) {
  
					scope.faceVertexUvs[ 0 ].push( [ tempUVs[ a ].clone(), tempUVs[ b ].clone(), tempUVs[ c ].clone() ] );
  
				}
  
				if ( uvs2 !== undefined ) {
  
					scope.faceVertexUvs[ 1 ].push( [ tempUVs2[ a ].clone(), tempUVs2[ b ].clone(), tempUVs2[ c ].clone() ] );
  
				}
  
			}
  
			var groups = geometry.groups;
  
			if ( groups.length > 0 ) {
  
				for ( var i = 0; i < groups.length; i ++ ) {
  
					var group = groups[ i ];
  
					var start = group.start;
					var count = group.count;
  
					for ( var j = start, jl = start + count; j < jl; j += 3 ) {
  
						if ( indices !== undefined ) {
  
							addFace( indices[ j ], indices[ j + 1 ], indices[ j + 2 ], group.materialIndex );
  
						} else {
  
							addFace( j, j + 1, j + 2, group.materialIndex );
  
						}
  
					}
  
				}
  
			} else {
  
				if ( indices !== undefined ) {
  
					for ( var i = 0; i < indices.length; i += 3 ) {
  
						addFace( indices[ i ], indices[ i + 1 ], indices[ i + 2 ] );
  
					}
  
				} else {
  
					for ( var i = 0; i < positions.length / 3; i += 3 ) {
  
						addFace( i, i + 1, i + 2 );
  
					}
  
				}
  
			}
  
			this.computeFaceNormals();
  
			if ( geometry.boundingBox !== null ) {
  
				this.boundingBox = geometry.boundingBox.clone();
  
			}
  
			if ( geometry.boundingSphere !== null ) {
  
				this.boundingSphere = geometry.boundingSphere.clone();
  
			}
  
			return this;
  
		},
  
		center: function () {
  
			var offset = new Vector3();
  
			return function center() {
  
				this.computeBoundingBox();
  
				this.boundingBox.getCenter( offset ).negate();
  
				this.translate( offset.x, offset.y, offset.z );
  
				return this;
  
			};
  
		}(),
  
		normalize: function () {
  
			this.computeBoundingSphere();
  
			var center = this.boundingSphere.center;
			var radius = this.boundingSphere.radius;
  
			var s = radius === 0 ? 1 : 1.0 / radius;
  
			var matrix = new Matrix4();
			matrix.set(
				s, 0, 0, - s * center.x,
				0, s, 0, - s * center.y,
				0, 0, s, - s * center.z,
				0, 0, 0, 1
			);
  
			this.applyMatrix( matrix );
  
			return this;
  
		},
  
		computeFaceNormals: function () {
  
			var cb = new Vector3(), ab = new Vector3();
  
			for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
				var face = this.faces[ f ];
  
				var vA = this.vertices[ face.a ];
				var vB = this.vertices[ face.b ];
				var vC = this.vertices[ face.c ];
  
				cb.subVectors( vC, vB );
				ab.subVectors( vA, vB );
				cb.cross( ab );
  
				cb.normalize();
  
				face.normal.copy( cb );
  
			}
  
		},
  
		computeVertexNormals: function ( areaWeighted ) {
  
			if ( areaWeighted === undefined ) areaWeighted = true;
  
			var v, vl, f, fl, face, vertices;
  
			vertices = new Array( this.vertices.length );
  
			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {
  
				vertices[ v ] = new Vector3();
  
			}
  
			if ( areaWeighted ) {
  
				// vertex normals weighted by triangle areas
				// http://www.iquilezles.org/www/articles/normals/normals.htm
  
				var vA, vB, vC;
				var cb = new Vector3(), ab = new Vector3();
  
				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
					face = this.faces[ f ];
  
					vA = this.vertices[ face.a ];
					vB = this.vertices[ face.b ];
					vC = this.vertices[ face.c ];
  
					cb.subVectors( vC, vB );
					ab.subVectors( vA, vB );
					cb.cross( ab );
  
					vertices[ face.a ].add( cb );
					vertices[ face.b ].add( cb );
					vertices[ face.c ].add( cb );
  
				}
  
			} else {
  
				this.computeFaceNormals();
  
				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
					face = this.faces[ f ];
  
					vertices[ face.a ].add( face.normal );
					vertices[ face.b ].add( face.normal );
					vertices[ face.c ].add( face.normal );
  
				}
  
			}
  
			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {
  
				vertices[ v ].normalize();
  
			}
  
			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
				face = this.faces[ f ];
  
				var vertexNormals = face.vertexNormals;
  
				if ( vertexNormals.length === 3 ) {
  
					vertexNormals[ 0 ].copy( vertices[ face.a ] );
					vertexNormals[ 1 ].copy( vertices[ face.b ] );
					vertexNormals[ 2 ].copy( vertices[ face.c ] );
  
				} else {
  
					vertexNormals[ 0 ] = vertices[ face.a ].clone();
					vertexNormals[ 1 ] = vertices[ face.b ].clone();
					vertexNormals[ 2 ] = vertices[ face.c ].clone();
  
				}
  
			}
  
			if ( this.faces.length > 0 ) {
  
				this.normalsNeedUpdate = true;
  
			}
  
		},
  
		computeFlatVertexNormals: function () {
  
			var f, fl, face;
  
			this.computeFaceNormals();
  
			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
				face = this.faces[ f ];
  
				var vertexNormals = face.vertexNormals;
  
				if ( vertexNormals.length === 3 ) {
  
					vertexNormals[ 0 ].copy( face.normal );
					vertexNormals[ 1 ].copy( face.normal );
					vertexNormals[ 2 ].copy( face.normal );
  
				} else {
  
					vertexNormals[ 0 ] = face.normal.clone();
					vertexNormals[ 1 ] = face.normal.clone();
					vertexNormals[ 2 ] = face.normal.clone();
  
				}
  
			}
  
			if ( this.faces.length > 0 ) {
  
				this.normalsNeedUpdate = true;
  
			}
  
		},
  
		computeMorphNormals: function () {
  
			var i, il, f, fl, face;
  
			// save original normals
			// - create temp variables on first access
			//   otherwise just copy (for faster repeated calls)
  
			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
				face = this.faces[ f ];
  
				if ( ! face.__originalFaceNormal ) {
  
					face.__originalFaceNormal = face.normal.clone();
  
				} else {
  
					face.__originalFaceNormal.copy( face.normal );
  
				}
  
				if ( ! face.__originalVertexNormals ) face.__originalVertexNormals = [];
  
				for ( i = 0, il = face.vertexNormals.length; i < il; i ++ ) {
  
					if ( ! face.__originalVertexNormals[ i ] ) {
  
						face.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();
  
					} else {
  
						face.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );
  
					}
  
				}
  
			}
  
			// use temp geometry to compute face and vertex normals for each morph
  
			var tmpGeo = new Geometry();
			tmpGeo.faces = this.faces;
  
			for ( i = 0, il = this.morphTargets.length; i < il; i ++ ) {
  
				// create on first access
  
				if ( ! this.morphNormals[ i ] ) {
  
					this.morphNormals[ i ] = {};
					this.morphNormals[ i ].faceNormals = [];
					this.morphNormals[ i ].vertexNormals = [];
  
					var dstNormalsFace = this.morphNormals[ i ].faceNormals;
					var dstNormalsVertex = this.morphNormals[ i ].vertexNormals;
  
					var faceNormal, vertexNormals;
  
					for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
						faceNormal = new Vector3();
						vertexNormals = { a: new Vector3(), b: new Vector3(), c: new Vector3() };
  
						dstNormalsFace.push( faceNormal );
						dstNormalsVertex.push( vertexNormals );
  
					}
  
				}
  
				var morphNormals = this.morphNormals[ i ];
  
				// set vertices to morph target
  
				tmpGeo.vertices = this.morphTargets[ i ].vertices;
  
				// compute morph normals
  
				tmpGeo.computeFaceNormals();
				tmpGeo.computeVertexNormals();
  
				// store morph normals
  
				var faceNormal, vertexNormals;
  
				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
					face = this.faces[ f ];
  
					faceNormal = morphNormals.faceNormals[ f ];
					vertexNormals = morphNormals.vertexNormals[ f ];
  
					faceNormal.copy( face.normal );
  
					vertexNormals.a.copy( face.vertexNormals[ 0 ] );
					vertexNormals.b.copy( face.vertexNormals[ 1 ] );
					vertexNormals.c.copy( face.vertexNormals[ 2 ] );
  
				}
  
			}
  
			// restore original normals
  
			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
  
				face = this.faces[ f ];
  
				face.normal = face.__originalFaceNormal;
				face.vertexNormals = face.__originalVertexNormals;
  
			}
  
		},
  
		computeBoundingBox: function () {
  
			if ( this.boundingBox === null ) {
  
				this.boundingBox = new Box3();
  
			}
  
			this.boundingBox.setFromPoints( this.vertices );
  
		},
  
		computeBoundingSphere: function () {
  
			if ( this.boundingSphere === null ) {
  
				this.boundingSphere = new Sphere();
  
			}
  
			this.boundingSphere.setFromPoints( this.vertices );
  
		},
  
		merge: function ( geometry, matrix, materialIndexOffset ) {
  
			if ( ! ( geometry && geometry.isGeometry ) ) {
  
				console.error( 'THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry );
				return;
  
			}
  
			var normalMatrix,
				vertexOffset = this.vertices.length,
				vertices1 = this.vertices,
				vertices2 = geometry.vertices,
				faces1 = this.faces,
				faces2 = geometry.faces,
				uvs1 = this.faceVertexUvs[ 0 ],
				uvs2 = geometry.faceVertexUvs[ 0 ],
				colors1 = this.colors,
				colors2 = geometry.colors;
  
			if ( materialIndexOffset === undefined ) materialIndexOffset = 0;
  
			if ( matrix !== undefined ) {
  
				normalMatrix = new Matrix3().getNormalMatrix( matrix );
  
			}
  
			// vertices
  
			for ( var i = 0, il = vertices2.length; i < il; i ++ ) {
  
				var vertex = vertices2[ i ];
  
				var vertexCopy = vertex.clone();
  
				if ( matrix !== undefined ) vertexCopy.applyMatrix4( matrix );
  
				vertices1.push( vertexCopy );
  
			}
  
			// colors
  
			for ( var i = 0, il = colors2.length; i < il; i ++ ) {
  
				colors1.push( colors2[ i ].clone() );
  
			}
  
			// faces
  
			for ( i = 0, il = faces2.length; i < il; i ++ ) {
  
				var face = faces2[ i ], faceCopy, normal, color,
					faceVertexNormals = face.vertexNormals,
					faceVertexColors = face.vertexColors;
  
				faceCopy = new Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );
				faceCopy.normal.copy( face.normal );
  
				if ( normalMatrix !== undefined ) {
  
					faceCopy.normal.applyMatrix3( normalMatrix ).normalize();
  
				}
  
				for ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {
  
					normal = faceVertexNormals[ j ].clone();
  
					if ( normalMatrix !== undefined ) {
  
						normal.applyMatrix3( normalMatrix ).normalize();
  
					}
  
					faceCopy.vertexNormals.push( normal );
  
				}
  
				faceCopy.color.copy( face.color );
  
				for ( var j = 0, jl = faceVertexColors.length; j < jl; j ++ ) {
  
					color = faceVertexColors[ j ];
					faceCopy.vertexColors.push( color.clone() );
  
				}
  
				faceCopy.materialIndex = face.materialIndex + materialIndexOffset;
  
				faces1.push( faceCopy );
  
			}
  
			// uvs
  
			for ( i = 0, il = uvs2.length; i < il; i ++ ) {
  
				var uv = uvs2[ i ], uvCopy = [];
  
				if ( uv === undefined ) {
  
					continue;
  
				}
  
				for ( var j = 0, jl = uv.length; j < jl; j ++ ) {
  
					uvCopy.push( uv[ j ].clone() );
  
				}
  
				uvs1.push( uvCopy );
  
			}
  
		},
  
		mergeMesh: function ( mesh ) {
  
			if ( ! ( mesh && mesh.isMesh ) ) {
  
				console.error( 'THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh );
				return;
  
			}
  
			if ( mesh.matrixAutoUpdate ) mesh.updateMatrix();
  
			this.merge( mesh.geometry, mesh.matrix );
  
		},
  
		/*
		 * Checks for duplicate vertices with hashmap.
		 * Duplicated vertices are removed
		 * and faces' vertices are updated.
		 */
  
		mergeVertices: function () {
  
			var verticesMap = {}; // Hashmap for looking up vertices by position coordinates (and making sure they are unique)
			var unique = [], changes = [];
  
			var v, key;
			var precisionPoints = 4; // number of decimal points, e.g. 4 for epsilon of 0.0001
			var precision = Math.pow( 10, precisionPoints );
			var i, il, face;
			var indices, j, jl;
  
			for ( i = 0, il = this.vertices.length; i < il; i ++ ) {
  
				v = this.vertices[ i ];
				key = Math.round( v.x * precision ) + '_' + Math.round( v.y * precision ) + '_' + Math.round( v.z * precision );
  
				if ( verticesMap[ key ] === undefined ) {
  
					verticesMap[ key ] = i;
					unique.push( this.vertices[ i ] );
					changes[ i ] = unique.length - 1;
  
				} else {
  
					//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);
					changes[ i ] = changes[ verticesMap[ key ] ];
  
				}
  
			}
  
  
			// if faces are completely degenerate after merging vertices, we
			// have to remove them from the geometry.
			var faceIndicesToRemove = [];
  
			for ( i = 0, il = this.faces.length; i < il; i ++ ) {
  
				face = this.faces[ i ];
  
				face.a = changes[ face.a ];
				face.b = changes[ face.b ];
				face.c = changes[ face.c ];
  
				indices = [ face.a, face.b, face.c ];
  
				// if any duplicate vertices are found in a Face3
				// we have to remove the face as nothing can be saved
				for ( var n = 0; n < 3; n ++ ) {
  
					if ( indices[ n ] === indices[ ( n + 1 ) % 3 ] ) {
  
						faceIndicesToRemove.push( i );
						break;
  
					}
  
				}
  
			}
  
			for ( i = faceIndicesToRemove.length - 1; i >= 0; i -- ) {
  
				var idx = faceIndicesToRemove[ i ];
  
				this.faces.splice( idx, 1 );
  
				for ( j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {
  
					this.faceVertexUvs[ j ].splice( idx, 1 );
  
				}
  
			}
  
			// Use unique set of vertices
  
			var diff = this.vertices.length - unique.length;
			this.vertices = unique;
			return diff;
  
		},
  
		setFromPoints: function ( points ) {
  
			this.vertices = [];
  
			for ( var i = 0, l = points.length; i < l; i ++ ) {
  
				var point = points[ i ];
				this.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );
  
			}
  
			return this;
  
		},
  
		sortFacesByMaterialIndex: function () {
  
			var faces = this.faces;
			var length = faces.length;
  
			// tag faces
  
			for ( var i = 0; i < length; i ++ ) {
  
				faces[ i ]._id = i;
  
			}
  
			// sort faces
  
			function materialIndexSort( a, b ) {
  
				return a.materialIndex - b.materialIndex;
  
			}
  
			faces.sort( materialIndexSort );
  
			// sort uvs
  
			var uvs1 = this.faceVertexUvs[ 0 ];
			var uvs2 = this.faceVertexUvs[ 1 ];
  
			var newUvs1, newUvs2;
  
			if ( uvs1 && uvs1.length === length ) newUvs1 = [];
			if ( uvs2 && uvs2.length === length ) newUvs2 = [];
  
			for ( var i = 0; i < length; i ++ ) {
  
				var id = faces[ i ]._id;
  
				if ( newUvs1 ) newUvs1.push( uvs1[ id ] );
				if ( newUvs2 ) newUvs2.push( uvs2[ id ] );
  
			}
  
			if ( newUvs1 ) this.faceVertexUvs[ 0 ] = newUvs1;
			if ( newUvs2 ) this.faceVertexUvs[ 1 ] = newUvs2;
  
		},
  
		toJSON: function () {
  
			var data = {
				metadata: {
					version: 4.5,
					type: 'Geometry',
					generator: 'Geometry.toJSON'
				}
			};
  
			// standard Geometry serialization
  
			data.uuid = this.uuid;
			data.type = this.type;
			if ( this.name !== '' ) data.name = this.name;
  
			if ( this.parameters !== undefined ) {
  
				var parameters = this.parameters;
  
				for ( var key in parameters ) {
  
					if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];
  
				}
  
				return data;
  
			}
  
			var vertices = [];
  
			for ( var i = 0; i < this.vertices.length; i ++ ) {
  
				var vertex = this.vertices[ i ];
				vertices.push( vertex.x, vertex.y, vertex.z );
  
			}
  
			var faces = [];
			var normals = [];
			var normalsHash = {};
			var colors = [];
			var colorsHash = {};
			var uvs = [];
			var uvsHash = {};
  
			for ( var i = 0; i < this.faces.length; i ++ ) {
  
				var face = this.faces[ i ];
  
				var hasMaterial = true;
				var hasFaceUv = false; // deprecated
				var hasFaceVertexUv = this.faceVertexUvs[ 0 ][ i ] !== undefined;
				var hasFaceNormal = face.normal.length() > 0;
				var hasFaceVertexNormal = face.vertexNormals.length > 0;
				var hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;
				var hasFaceVertexColor = face.vertexColors.length > 0;
  
				var faceType = 0;
  
				faceType = setBit( faceType, 0, 0 ); // isQuad
				faceType = setBit( faceType, 1, hasMaterial );
				faceType = setBit( faceType, 2, hasFaceUv );
				faceType = setBit( faceType, 3, hasFaceVertexUv );
				faceType = setBit( faceType, 4, hasFaceNormal );
				faceType = setBit( faceType, 5, hasFaceVertexNormal );
				faceType = setBit( faceType, 6, hasFaceColor );
				faceType = setBit( faceType, 7, hasFaceVertexColor );
  
				faces.push( faceType );
				faces.push( face.a, face.b, face.c );
				faces.push( face.materialIndex );
  
				if ( hasFaceVertexUv ) {
  
					var faceVertexUvs = this.faceVertexUvs[ 0 ][ i ];
  
					faces.push(
						getUvIndex( faceVertexUvs[ 0 ] ),
						getUvIndex( faceVertexUvs[ 1 ] ),
						getUvIndex( faceVertexUvs[ 2 ] )
					);
  
				}
  
				if ( hasFaceNormal ) {
  
					faces.push( getNormalIndex( face.normal ) );
  
				}
  
				if ( hasFaceVertexNormal ) {
  
					var vertexNormals = face.vertexNormals;
  
					faces.push(
						getNormalIndex( vertexNormals[ 0 ] ),
						getNormalIndex( vertexNormals[ 1 ] ),
						getNormalIndex( vertexNormals[ 2 ] )
					);
  
				}
  
				if ( hasFaceColor ) {
  
					faces.push( getColorIndex( face.color ) );
  
				}
  
				if ( hasFaceVertexColor ) {
  
					var vertexColors = face.vertexColors;
  
					faces.push(
						getColorIndex( vertexColors[ 0 ] ),
						getColorIndex( vertexColors[ 1 ] ),
						getColorIndex( vertexColors[ 2 ] )
					);
  
				}
  
			}
  
			function setBit( value, position, enabled ) {
  
				return enabled ? value | ( 1 << position ) : value & ( ~ ( 1 << position ) );
  
			}
  
			function getNormalIndex( normal ) {
  
				var hash = normal.x.toString() + normal.y.toString() + normal.z.toString();
  
				if ( normalsHash[ hash ] !== undefined ) {
  
					return normalsHash[ hash ];
  
				}
  
				normalsHash[ hash ] = normals.length / 3;
				normals.push( normal.x, normal.y, normal.z );
  
				return normalsHash[ hash ];
  
			}
  
			function getColorIndex( color ) {
  
				var hash = color.r.toString() + color.g.toString() + color.b.toString();
  
				if ( colorsHash[ hash ] !== undefined ) {
  
					return colorsHash[ hash ];
  
				}
  
				colorsHash[ hash ] = colors.length;
				colors.push( color.getHex() );
  
				return colorsHash[ hash ];
  
			}
  
			function getUvIndex( uv ) {
  
				var hash = uv.x.toString() + uv.y.toString();
  
				if ( uvsHash[ hash ] !== undefined ) {
  
					return uvsHash[ hash ];
  
				}
  
				uvsHash[ hash ] = uvs.length / 2;
				uvs.push( uv.x, uv.y );
  
				return uvsHash[ hash ];
  
			}
  
			data.data = {};
  
			data.data.vertices = vertices;
			data.data.normals = normals;
			if ( colors.length > 0 ) data.data.colors = colors;
			if ( uvs.length > 0 ) data.data.uvs = [ uvs ]; // temporal backward compatibility
			data.data.faces = faces;
  
			return data;
  
		},
  
		clone: function () {
  
			/*
			 // Handle primitives
  
			 var parameters = this.parameters;
  
			 if ( parameters !== undefined ) {
  
			 var values = [];
  
			 for ( var key in parameters ) {
  
			 values.push( parameters[ key ] );
  
			 }
  
			 var geometry = Object.create( this.constructor.prototype );
			 this.constructor.apply( geometry, values );
			 return geometry;
  
			 }
  
			 return new this.constructor().copy( this );
			 */
  
			return new Geometry().copy( this );
  
		},
  
		copy: function ( source ) {
  
			var i, il, j, jl, k, kl;
  
			// reset
  
			this.vertices = [];
			this.colors = [];
			this.faces = [];
			this.faceVertexUvs = [[]];
			this.morphTargets = [];
			this.morphNormals = [];
			this.skinWeights = [];
			this.skinIndices = [];
			this.lineDistances = [];
			this.boundingBox = null;
			this.boundingSphere = null;
  
			// name
  
			this.name = source.name;
  
			// vertices
  
			var vertices = source.vertices;
  
			for ( i = 0, il = vertices.length; i < il; i ++ ) {
  
				this.vertices.push( vertices[ i ].clone() );
  
			}
  
			// colors
  
			var colors = source.colors;
  
			for ( i = 0, il = colors.length; i < il; i ++ ) {
  
				this.colors.push( colors[ i ].clone() );
  
			}
  
			// faces
  
			var faces = source.faces;
  
			for ( i = 0, il = faces.length; i < il; i ++ ) {
  
				this.faces.push( faces[ i ].clone() );
  
			}
  
			// face vertex uvs
  
			for ( i = 0, il = source.faceVertexUvs.length; i < il; i ++ ) {
  
				var faceVertexUvs = source.faceVertexUvs[ i ];
  
				if ( this.faceVertexUvs[ i ] === undefined ) {
  
					this.faceVertexUvs[ i ] = [];
  
				}
  
				for ( j = 0, jl = faceVertexUvs.length; j < jl; j ++ ) {
  
					var uvs = faceVertexUvs[ j ], uvsCopy = [];
  
					for ( k = 0, kl = uvs.length; k < kl; k ++ ) {
  
						var uv = uvs[ k ];
  
						uvsCopy.push( uv.clone() );
  
					}
  
					this.faceVertexUvs[ i ].push( uvsCopy );
  
				}
  
			}
  
			// morph targets
  
			var morphTargets = source.morphTargets;
  
			for ( i = 0, il = morphTargets.length; i < il; i ++ ) {
  
				var morphTarget = {};
				morphTarget.name = morphTargets[ i ].name;
  
				// vertices
  
				if ( morphTargets[ i ].vertices !== undefined ) {
  
					morphTarget.vertices = [];
  
					for ( j = 0, jl = morphTargets[ i ].vertices.length; j < jl; j ++ ) {
  
						morphTarget.vertices.push( morphTargets[ i ].vertices[ j ].clone() );
  
					}
  
				}
  
				// normals
  
				if ( morphTargets[ i ].normals !== undefined ) {
  
					morphTarget.normals = [];
  
					for ( j = 0, jl = morphTargets[ i ].normals.length; j < jl; j ++ ) {
  
						morphTarget.normals.push( morphTargets[ i ].normals[ j ].clone() );
  
					}
  
				}
  
				this.morphTargets.push( morphTarget );
  
			}
  
			// morph normals
  
			var morphNormals = source.morphNormals;
  
			for ( i = 0, il = morphNormals.length; i < il; i ++ ) {
  
				var morphNormal = {};
  
				// vertex normals
  
				if ( morphNormals[ i ].vertexNormals !== undefined ) {
  
					morphNormal.vertexNormals = [];
  
					for ( j = 0, jl = morphNormals[ i ].vertexNormals.length; j < jl; j ++ ) {
  
						var srcVertexNormal = morphNormals[ i ].vertexNormals[ j ];
						var destVertexNormal = {};
  
						destVertexNormal.a = srcVertexNormal.a.clone();
						destVertexNormal.b = srcVertexNormal.b.clone();
						destVertexNormal.c = srcVertexNormal.c.clone();
  
						morphNormal.vertexNormals.push( destVertexNormal );
  
					}
  
				}
  
				// face normals
  
				if ( morphNormals[ i ].faceNormals !== undefined ) {
  
					morphNormal.faceNormals = [];
  
					for ( j = 0, jl = morphNormals[ i ].faceNormals.length; j < jl; j ++ ) {
  
						morphNormal.faceNormals.push( morphNormals[ i ].faceNormals[ j ].clone() );
  
					}
  
				}
  
				this.morphNormals.push( morphNormal );
  
			}
  
			// skin weights
  
			var skinWeights = source.skinWeights;
  
			for ( i = 0, il = skinWeights.length; i < il; i ++ ) {
  
				this.skinWeights.push( skinWeights[ i ].clone() );
  
			}
  
			// skin indices
  
			var skinIndices = source.skinIndices;
  
			for ( i = 0, il = skinIndices.length; i < il; i ++ ) {
  
				this.skinIndices.push( skinIndices[ i ].clone() );
  
			}
  
			// line distances
  
			var lineDistances = source.lineDistances;
  
			for ( i = 0, il = lineDistances.length; i < il; i ++ ) {
  
				this.lineDistances.push( lineDistances[ i ] );
  
			}
  
			// bounding box
  
			var boundingBox = source.boundingBox;
  
			if ( boundingBox !== null ) {
  
				this.boundingBox = boundingBox.clone();
  
			}
  
			// bounding sphere
  
			var boundingSphere = source.boundingSphere;
  
			if ( boundingSphere !== null ) {
  
				this.boundingSphere = boundingSphere.clone();
  
			}
  
			// update flags
  
			this.elementsNeedUpdate = source.elementsNeedUpdate;
			this.verticesNeedUpdate = source.verticesNeedUpdate;
			this.uvsNeedUpdate = source.uvsNeedUpdate;
			this.normalsNeedUpdate = source.normalsNeedUpdate;
			this.colorsNeedUpdate = source.colorsNeedUpdate;
			this.lineDistancesNeedUpdate = source.lineDistancesNeedUpdate;
			this.groupsNeedUpdate = source.groupsNeedUpdate;
  
			return this;
  
		},
  
		dispose: function () {
  
			this.dispatchEvent( { type: 'dispose' } );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function BufferAttribute( array, itemSize, normalized ) {
  
		if ( Array.isArray( array ) ) {
  
			throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );
  
		}
  
		this.name = '';
  
		this.array = array;
		this.itemSize = itemSize;
		this.count = array !== undefined ? array.length / itemSize : 0;
		this.normalized = normalized === true;
  
		this.dynamic = false;
		this.updateRange = { offset: 0, count: - 1 };
  
		this.version = 0;
  
	}
  
	Object.defineProperty( BufferAttribute.prototype, 'needsUpdate', {
  
		set: function ( value ) {
  
			if ( value === true ) this.version ++;
  
		}
  
	} );
  
	Object.assign( BufferAttribute.prototype, {
  
		isBufferAttribute: true,
  
		onUploadCallback: function () {},
  
		setArray: function ( array ) {
  
			if ( Array.isArray( array ) ) {
  
				throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );
  
			}
  
			this.count = array !== undefined ? array.length / this.itemSize : 0;
			this.array = array;
  
			return this;
  
		},
  
		setDynamic: function ( value ) {
  
			this.dynamic = value;
  
			return this;
  
		},
  
		copy: function ( source ) {
  
			this.name = source.name;
			this.array = new source.array.constructor( source.array );
			this.itemSize = source.itemSize;
			this.count = source.count;
			this.normalized = source.normalized;
  
			this.dynamic = source.dynamic;
  
			return this;
  
		},
  
		copyAt: function ( index1, attribute, index2 ) {
  
			index1 *= this.itemSize;
			index2 *= attribute.itemSize;
  
			for ( var i = 0, l = this.itemSize; i < l; i ++ ) {
  
				this.array[ index1 + i ] = attribute.array[ index2 + i ];
  
			}
  
			return this;
  
		},
  
		copyArray: function ( array ) {
  
			this.array.set( array );
  
			return this;
  
		},
  
		copyColorsArray: function ( colors ) {
  
			var array = this.array, offset = 0;
  
			for ( var i = 0, l = colors.length; i < l; i ++ ) {
  
				var color = colors[ i ];
  
				if ( color === undefined ) {
  
					console.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );
					color = new Color();
  
				}
  
				array[ offset ++ ] = color.r;
				array[ offset ++ ] = color.g;
				array[ offset ++ ] = color.b;
  
			}
  
			return this;
  
		},
  
		copyVector2sArray: function ( vectors ) {
  
			var array = this.array, offset = 0;
  
			for ( var i = 0, l = vectors.length; i < l; i ++ ) {
  
				var vector = vectors[ i ];
  
				if ( vector === undefined ) {
  
					console.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );
					vector = new Vector2();
  
				}
  
				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;
  
			}
  
			return this;
  
		},
  
		copyVector3sArray: function ( vectors ) {
  
			var array = this.array, offset = 0;
  
			for ( var i = 0, l = vectors.length; i < l; i ++ ) {
  
				var vector = vectors[ i ];
  
				if ( vector === undefined ) {
  
					console.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );
					vector = new Vector3();
  
				}
  
				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;
				array[ offset ++ ] = vector.z;
  
			}
  
			return this;
  
		},
  
		copyVector4sArray: function ( vectors ) {
  
			var array = this.array, offset = 0;
  
			for ( var i = 0, l = vectors.length; i < l; i ++ ) {
  
				var vector = vectors[ i ];
  
				if ( vector === undefined ) {
  
					console.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );
					vector = new Vector4();
  
				}
  
				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;
				array[ offset ++ ] = vector.z;
				array[ offset ++ ] = vector.w;
  
			}
  
			return this;
  
		},
  
		set: function ( value, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.array.set( value, offset );
  
			return this;
  
		},
  
		getX: function ( index ) {
  
			return this.array[ index * this.itemSize ];
  
		},
  
		setX: function ( index, x ) {
  
			this.array[ index * this.itemSize ] = x;
  
			return this;
  
		},
  
		getY: function ( index ) {
  
			return this.array[ index * this.itemSize + 1 ];
  
		},
  
		setY: function ( index, y ) {
  
			this.array[ index * this.itemSize + 1 ] = y;
  
			return this;
  
		},
  
		getZ: function ( index ) {
  
			return this.array[ index * this.itemSize + 2 ];
  
		},
  
		setZ: function ( index, z ) {
  
			this.array[ index * this.itemSize + 2 ] = z;
  
			return this;
  
		},
  
		getW: function ( index ) {
  
			return this.array[ index * this.itemSize + 3 ];
  
		},
  
		setW: function ( index, w ) {
  
			this.array[ index * this.itemSize + 3 ] = w;
  
			return this;
  
		},
  
		setXY: function ( index, x, y ) {
  
			index *= this.itemSize;
  
			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;
  
			return this;
  
		},
  
		setXYZ: function ( index, x, y, z ) {
  
			index *= this.itemSize;
  
			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;
			this.array[ index + 2 ] = z;
  
			return this;
  
		},
  
		setXYZW: function ( index, x, y, z, w ) {
  
			index *= this.itemSize;
  
			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;
			this.array[ index + 2 ] = z;
			this.array[ index + 3 ] = w;
  
			return this;
  
		},
  
		onUpload: function ( callback ) {
  
			this.onUploadCallback = callback;
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor( this.array, this.itemSize ).copy( this );
  
		}
  
	} );
  
	//
  
	function Int8BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Int8Array( array ), itemSize, normalized );
  
	}
  
	Int8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Int8BufferAttribute.prototype.constructor = Int8BufferAttribute;
  
  
	function Uint8BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Uint8Array( array ), itemSize, normalized );
  
	}
  
	Uint8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint8BufferAttribute.prototype.constructor = Uint8BufferAttribute;
  
  
	function Uint8ClampedBufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Uint8ClampedArray( array ), itemSize, normalized );
  
	}
  
	Uint8ClampedBufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint8ClampedBufferAttribute.prototype.constructor = Uint8ClampedBufferAttribute;
  
  
	function Int16BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Int16Array( array ), itemSize, normalized );
  
	}
  
	Int16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Int16BufferAttribute.prototype.constructor = Int16BufferAttribute;
  
  
	function Uint16BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );
  
	}
  
	Uint16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;
  
  
	function Int32BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Int32Array( array ), itemSize, normalized );
  
	}
  
	Int32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Int32BufferAttribute.prototype.constructor = Int32BufferAttribute;
  
  
	function Uint32BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Uint32Array( array ), itemSize, normalized );
  
	}
  
	Uint32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;
  
  
	function Float32BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Float32Array( array ), itemSize, normalized );
  
	}
  
	Float32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Float32BufferAttribute.prototype.constructor = Float32BufferAttribute;
  
  
	function Float64BufferAttribute( array, itemSize, normalized ) {
  
		BufferAttribute.call( this, new Float64Array( array ), itemSize, normalized );
  
	}
  
	Float64BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Float64BufferAttribute.prototype.constructor = Float64BufferAttribute;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function DirectGeometry() {
  
		this.vertices = [];
		this.normals = [];
		this.colors = [];
		this.uvs = [];
		this.uvs2 = [];
  
		this.groups = [];
  
		this.morphTargets = {};
  
		this.skinWeights = [];
		this.skinIndices = [];
  
		// this.lineDistances = [];
  
		this.boundingBox = null;
		this.boundingSphere = null;
  
		// update flags
  
		this.verticesNeedUpdate = false;
		this.normalsNeedUpdate = false;
		this.colorsNeedUpdate = false;
		this.uvsNeedUpdate = false;
		this.groupsNeedUpdate = false;
  
	}
  
	Object.assign( DirectGeometry.prototype, {
  
		computeGroups: function ( geometry ) {
  
			var group;
			var groups = [];
			var materialIndex = undefined;
  
			var faces = geometry.faces;
  
			for ( var i = 0; i < faces.length; i ++ ) {
  
				var face = faces[ i ];
  
				// materials
  
				if ( face.materialIndex !== materialIndex ) {
  
					materialIndex = face.materialIndex;
  
					if ( group !== undefined ) {
  
						group.count = ( i * 3 ) - group.start;
						groups.push( group );
  
					}
  
					group = {
						start: i * 3,
						materialIndex: materialIndex
					};
  
				}
  
			}
  
			if ( group !== undefined ) {
  
				group.count = ( i * 3 ) - group.start;
				groups.push( group );
  
			}
  
			this.groups = groups;
  
		},
  
		fromGeometry: function ( geometry ) {
  
			var faces = geometry.faces;
			var vertices = geometry.vertices;
			var faceVertexUvs = geometry.faceVertexUvs;
  
			var hasFaceVertexUv = faceVertexUvs[ 0 ] && faceVertexUvs[ 0 ].length > 0;
			var hasFaceVertexUv2 = faceVertexUvs[ 1 ] && faceVertexUvs[ 1 ].length > 0;
  
			// morphs
  
			var morphTargets = geometry.morphTargets;
			var morphTargetsLength = morphTargets.length;
  
			var morphTargetsPosition;
  
			if ( morphTargetsLength > 0 ) {
  
				morphTargetsPosition = [];
  
				for ( var i = 0; i < morphTargetsLength; i ++ ) {
  
					morphTargetsPosition[ i ] = [];
  
				}
  
				this.morphTargets.position = morphTargetsPosition;
  
			}
  
			var morphNormals = geometry.morphNormals;
			var morphNormalsLength = morphNormals.length;
  
			var morphTargetsNormal;
  
			if ( morphNormalsLength > 0 ) {
  
				morphTargetsNormal = [];
  
				for ( var i = 0; i < morphNormalsLength; i ++ ) {
  
					morphTargetsNormal[ i ] = [];
  
				}
  
				this.morphTargets.normal = morphTargetsNormal;
  
			}
  
			// skins
  
			var skinIndices = geometry.skinIndices;
			var skinWeights = geometry.skinWeights;
  
			var hasSkinIndices = skinIndices.length === vertices.length;
			var hasSkinWeights = skinWeights.length === vertices.length;
  
			//
  
			if ( faces.length === 0 ) {
  
				console.error( 'THREE.DirectGeometry: Faceless geometries are not supported.' );
  
			}
  
			for ( var i = 0; i < faces.length; i ++ ) {
  
				var face = faces[ i ];
  
				this.vertices.push( vertices[ face.a ], vertices[ face.b ], vertices[ face.c ] );
  
				var vertexNormals = face.vertexNormals;
  
				if ( vertexNormals.length === 3 ) {
  
					this.normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );
  
				} else {
  
					var normal = face.normal;
  
					this.normals.push( normal, normal, normal );
  
				}
  
				var vertexColors = face.vertexColors;
  
				if ( vertexColors.length === 3 ) {
  
					this.colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );
  
				} else {
  
					var color = face.color;
  
					this.colors.push( color, color, color );
  
				}
  
				if ( hasFaceVertexUv === true ) {
  
					var vertexUvs = faceVertexUvs[ 0 ][ i ];
  
					if ( vertexUvs !== undefined ) {
  
						this.uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );
  
					} else {
  
						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv ', i );
  
						this.uvs.push( new Vector2(), new Vector2(), new Vector2() );
  
					}
  
				}
  
				if ( hasFaceVertexUv2 === true ) {
  
					var vertexUvs = faceVertexUvs[ 1 ][ i ];
  
					if ( vertexUvs !== undefined ) {
  
						this.uvs2.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );
  
					} else {
  
						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv2 ', i );
  
						this.uvs2.push( new Vector2(), new Vector2(), new Vector2() );
  
					}
  
				}
  
				// morphs
  
				for ( var j = 0; j < morphTargetsLength; j ++ ) {
  
					var morphTarget = morphTargets[ j ].vertices;
  
					morphTargetsPosition[ j ].push( morphTarget[ face.a ], morphTarget[ face.b ], morphTarget[ face.c ] );
  
				}
  
				for ( var j = 0; j < morphNormalsLength; j ++ ) {
  
					var morphNormal = morphNormals[ j ].vertexNormals[ i ];
  
					morphTargetsNormal[ j ].push( morphNormal.a, morphNormal.b, morphNormal.c );
  
				}
  
				// skins
  
				if ( hasSkinIndices ) {
  
					this.skinIndices.push( skinIndices[ face.a ], skinIndices[ face.b ], skinIndices[ face.c ] );
  
				}
  
				if ( hasSkinWeights ) {
  
					this.skinWeights.push( skinWeights[ face.a ], skinWeights[ face.b ], skinWeights[ face.c ] );
  
				}
  
			}
  
			this.computeGroups( geometry );
  
			this.verticesNeedUpdate = geometry.verticesNeedUpdate;
			this.normalsNeedUpdate = geometry.normalsNeedUpdate;
			this.colorsNeedUpdate = geometry.colorsNeedUpdate;
			this.uvsNeedUpdate = geometry.uvsNeedUpdate;
			this.groupsNeedUpdate = geometry.groupsNeedUpdate;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function arrayMax( array ) {
  
		if ( array.length === 0 ) return - Infinity;
  
		var max = array[ 0 ];
  
		for ( var i = 1, l = array.length; i < l; ++ i ) {
  
			if ( array[ i ] > max ) max = array[ i ];
  
		}
  
		return max;
  
	}
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var bufferGeometryId = 1; // BufferGeometry uses odd numbers as Id
  
	function BufferGeometry() {
  
		Object.defineProperty( this, 'id', { value: bufferGeometryId += 2 } );
  
		this.uuid = _Math.generateUUID();
  
		this.name = '';
		this.type = 'BufferGeometry';
  
		this.index = null;
		this.attributes = {};
  
		this.morphAttributes = {};
  
		this.groups = [];
  
		this.boundingBox = null;
		this.boundingSphere = null;
  
		this.drawRange = { start: 0, count: Infinity };
  
		this.userData = {};
  
	}
  
	BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: BufferGeometry,
  
		isBufferGeometry: true,
  
		getIndex: function () {
  
			return this.index;
  
		},
  
		setIndex: function ( index ) {
  
			if ( Array.isArray( index ) ) {
  
				this.index = new ( arrayMax( index ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( index, 1 );
  
			} else {
  
				this.index = index;
  
			}
  
		},
  
		addAttribute: function ( name, attribute ) {
  
			if ( ! ( attribute && attribute.isBufferAttribute ) && ! ( attribute && attribute.isInterleavedBufferAttribute ) ) {
  
				console.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );
  
				return this.addAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );
  
			}
  
			if ( name === 'index' ) {
  
				console.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );
				this.setIndex( attribute );
  
				return this;
  
			}
  
			this.attributes[ name ] = attribute;
  
			return this;
  
		},
  
		getAttribute: function ( name ) {
  
			return this.attributes[ name ];
  
		},
  
		removeAttribute: function ( name ) {
  
			delete this.attributes[ name ];
  
			return this;
  
		},
  
		addGroup: function ( start, count, materialIndex ) {
  
			this.groups.push( {
  
				start: start,
				count: count,
				materialIndex: materialIndex !== undefined ? materialIndex : 0
  
			} );
  
		},
  
		clearGroups: function () {
  
			this.groups = [];
  
		},
  
		setDrawRange: function ( start, count ) {
  
			this.drawRange.start = start;
			this.drawRange.count = count;
  
		},
  
		applyMatrix: function ( matrix ) {
  
			var position = this.attributes.position;
  
			if ( position !== undefined ) {
  
				matrix.applyToBufferAttribute( position );
				position.needsUpdate = true;
  
			}
  
			var normal = this.attributes.normal;
  
			if ( normal !== undefined ) {
  
				var normalMatrix = new Matrix3().getNormalMatrix( matrix );
  
				normalMatrix.applyToBufferAttribute( normal );
				normal.needsUpdate = true;
  
			}
  
			if ( this.boundingBox !== null ) {
  
				this.computeBoundingBox();
  
			}
  
			if ( this.boundingSphere !== null ) {
  
				this.computeBoundingSphere();
  
			}
  
			return this;
  
		},
  
		rotateX: function () {
  
			// rotate geometry around world x-axis
  
			var m1 = new Matrix4();
  
			return function rotateX( angle ) {
  
				m1.makeRotationX( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		rotateY: function () {
  
			// rotate geometry around world y-axis
  
			var m1 = new Matrix4();
  
			return function rotateY( angle ) {
  
				m1.makeRotationY( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		rotateZ: function () {
  
			// rotate geometry around world z-axis
  
			var m1 = new Matrix4();
  
			return function rotateZ( angle ) {
  
				m1.makeRotationZ( angle );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		translate: function () {
  
			// translate geometry
  
			var m1 = new Matrix4();
  
			return function translate( x, y, z ) {
  
				m1.makeTranslation( x, y, z );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		scale: function () {
  
			// scale geometry
  
			var m1 = new Matrix4();
  
			return function scale( x, y, z ) {
  
				m1.makeScale( x, y, z );
  
				this.applyMatrix( m1 );
  
				return this;
  
			};
  
		}(),
  
		lookAt: function () {
  
			var obj = new Object3D();
  
			return function lookAt( vector ) {
  
				obj.lookAt( vector );
  
				obj.updateMatrix();
  
				this.applyMatrix( obj.matrix );
  
			};
  
		}(),
  
		center: function () {
  
			var offset = new Vector3();
  
			return function center() {
  
				this.computeBoundingBox();
  
				this.boundingBox.getCenter( offset ).negate();
  
				this.translate( offset.x, offset.y, offset.z );
  
				return this;
  
			};
  
		}(),
  
		setFromObject: function ( object ) {
  
			// console.log( 'THREE.BufferGeometry.setFromObject(). Converting', object, this );
  
			var geometry = object.geometry;
  
			if ( object.isPoints || object.isLine ) {
  
				var positions = new Float32BufferAttribute( geometry.vertices.length * 3, 3 );
				var colors = new Float32BufferAttribute( geometry.colors.length * 3, 3 );
  
				this.addAttribute( 'position', positions.copyVector3sArray( geometry.vertices ) );
				this.addAttribute( 'color', colors.copyColorsArray( geometry.colors ) );
  
				if ( geometry.lineDistances && geometry.lineDistances.length === geometry.vertices.length ) {
  
					var lineDistances = new Float32BufferAttribute( geometry.lineDistances.length, 1 );
  
					this.addAttribute( 'lineDistance', lineDistances.copyArray( geometry.lineDistances ) );
  
				}
  
				if ( geometry.boundingSphere !== null ) {
  
					this.boundingSphere = geometry.boundingSphere.clone();
  
				}
  
				if ( geometry.boundingBox !== null ) {
  
					this.boundingBox = geometry.boundingBox.clone();
  
				}
  
			} else if ( object.isMesh ) {
  
				if ( geometry && geometry.isGeometry ) {
  
					this.fromGeometry( geometry );
  
				}
  
			}
  
			return this;
  
		},
  
		setFromPoints: function ( points ) {
  
			var position = [];
  
			for ( var i = 0, l = points.length; i < l; i ++ ) {
  
				var point = points[ i ];
				position.push( point.x, point.y, point.z || 0 );
  
			}
  
			this.addAttribute( 'position', new Float32BufferAttribute( position, 3 ) );
  
			return this;
  
		},
  
		updateFromObject: function ( object ) {
  
			var geometry = object.geometry;
  
			if ( object.isMesh ) {
  
				var direct = geometry.__directGeometry;
  
				if ( geometry.elementsNeedUpdate === true ) {
  
					direct = undefined;
					geometry.elementsNeedUpdate = false;
  
				}
  
				if ( direct === undefined ) {
  
					return this.fromGeometry( geometry );
  
				}
  
				direct.verticesNeedUpdate = geometry.verticesNeedUpdate;
				direct.normalsNeedUpdate = geometry.normalsNeedUpdate;
				direct.colorsNeedUpdate = geometry.colorsNeedUpdate;
				direct.uvsNeedUpdate = geometry.uvsNeedUpdate;
				direct.groupsNeedUpdate = geometry.groupsNeedUpdate;
  
				geometry.verticesNeedUpdate = false;
				geometry.normalsNeedUpdate = false;
				geometry.colorsNeedUpdate = false;
				geometry.uvsNeedUpdate = false;
				geometry.groupsNeedUpdate = false;
  
				geometry = direct;
  
			}
  
			var attribute;
  
			if ( geometry.verticesNeedUpdate === true ) {
  
				attribute = this.attributes.position;
  
				if ( attribute !== undefined ) {
  
					attribute.copyVector3sArray( geometry.vertices );
					attribute.needsUpdate = true;
  
				}
  
				geometry.verticesNeedUpdate = false;
  
			}
  
			if ( geometry.normalsNeedUpdate === true ) {
  
				attribute = this.attributes.normal;
  
				if ( attribute !== undefined ) {
  
					attribute.copyVector3sArray( geometry.normals );
					attribute.needsUpdate = true;
  
				}
  
				geometry.normalsNeedUpdate = false;
  
			}
  
			if ( geometry.colorsNeedUpdate === true ) {
  
				attribute = this.attributes.color;
  
				if ( attribute !== undefined ) {
  
					attribute.copyColorsArray( geometry.colors );
					attribute.needsUpdate = true;
  
				}
  
				geometry.colorsNeedUpdate = false;
  
			}
  
			if ( geometry.uvsNeedUpdate ) {
  
				attribute = this.attributes.uv;
  
				if ( attribute !== undefined ) {
  
					attribute.copyVector2sArray( geometry.uvs );
					attribute.needsUpdate = true;
  
				}
  
				geometry.uvsNeedUpdate = false;
  
			}
  
			if ( geometry.lineDistancesNeedUpdate ) {
  
				attribute = this.attributes.lineDistance;
  
				if ( attribute !== undefined ) {
  
					attribute.copyArray( geometry.lineDistances );
					attribute.needsUpdate = true;
  
				}
  
				geometry.lineDistancesNeedUpdate = false;
  
			}
  
			if ( geometry.groupsNeedUpdate ) {
  
				geometry.computeGroups( object.geometry );
				this.groups = geometry.groups;
  
				geometry.groupsNeedUpdate = false;
  
			}
  
			return this;
  
		},
  
		fromGeometry: function ( geometry ) {
  
			geometry.__directGeometry = new DirectGeometry().fromGeometry( geometry );
  
			return this.fromDirectGeometry( geometry.__directGeometry );
  
		},
  
		fromDirectGeometry: function ( geometry ) {
  
			var positions = new Float32Array( geometry.vertices.length * 3 );
			this.addAttribute( 'position', new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices ) );
  
			if ( geometry.normals.length > 0 ) {
  
				var normals = new Float32Array( geometry.normals.length * 3 );
				this.addAttribute( 'normal', new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals ) );
  
			}
  
			if ( geometry.colors.length > 0 ) {
  
				var colors = new Float32Array( geometry.colors.length * 3 );
				this.addAttribute( 'color', new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors ) );
  
			}
  
			if ( geometry.uvs.length > 0 ) {
  
				var uvs = new Float32Array( geometry.uvs.length * 2 );
				this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs ) );
  
			}
  
			if ( geometry.uvs2.length > 0 ) {
  
				var uvs2 = new Float32Array( geometry.uvs2.length * 2 );
				this.addAttribute( 'uv2', new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 ) );
  
			}
  
			// groups
  
			this.groups = geometry.groups;
  
			// morphs
  
			for ( var name in geometry.morphTargets ) {
  
				var array = [];
				var morphTargets = geometry.morphTargets[ name ];
  
				for ( var i = 0, l = morphTargets.length; i < l; i ++ ) {
  
					var morphTarget = morphTargets[ i ];
  
					var attribute = new Float32BufferAttribute( morphTarget.length * 3, 3 );
  
					array.push( attribute.copyVector3sArray( morphTarget ) );
  
				}
  
				this.morphAttributes[ name ] = array;
  
			}
  
			// skinning
  
			if ( geometry.skinIndices.length > 0 ) {
  
				var skinIndices = new Float32BufferAttribute( geometry.skinIndices.length * 4, 4 );
				this.addAttribute( 'skinIndex', skinIndices.copyVector4sArray( geometry.skinIndices ) );
  
			}
  
			if ( geometry.skinWeights.length > 0 ) {
  
				var skinWeights = new Float32BufferAttribute( geometry.skinWeights.length * 4, 4 );
				this.addAttribute( 'skinWeight', skinWeights.copyVector4sArray( geometry.skinWeights ) );
  
			}
  
			//
  
			if ( geometry.boundingSphere !== null ) {
  
				this.boundingSphere = geometry.boundingSphere.clone();
  
			}
  
			if ( geometry.boundingBox !== null ) {
  
				this.boundingBox = geometry.boundingBox.clone();
  
			}
  
			return this;
  
		},
  
		computeBoundingBox: function () {
  
			if ( this.boundingBox === null ) {
  
				this.boundingBox = new Box3();
  
			}
  
			var position = this.attributes.position;
  
			if ( position !== undefined ) {
  
				this.boundingBox.setFromBufferAttribute( position );
  
			} else {
  
				this.boundingBox.makeEmpty();
  
			}
  
			if ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {
  
				console.error( 'THREE.BufferGeometry.computeBoundingBox: Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this );
  
			}
  
		},
  
		computeBoundingSphere: function () {
  
			var box = new Box3();
			var vector = new Vector3();
  
			return function computeBoundingSphere() {
  
				if ( this.boundingSphere === null ) {
  
					this.boundingSphere = new Sphere();
  
				}
  
				var position = this.attributes.position;
  
				if ( position ) {
  
					var center = this.boundingSphere.center;
  
					box.setFromBufferAttribute( position );
					box.getCenter( center );
  
					// hoping to find a boundingSphere with a radius smaller than the
					// boundingSphere of the boundingBox: sqrt(3) smaller in the best case
  
					var maxRadiusSq = 0;
  
					for ( var i = 0, il = position.count; i < il; i ++ ) {
  
						vector.x = position.getX( i );
						vector.y = position.getY( i );
						vector.z = position.getZ( i );
						maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( vector ) );
  
					}
  
					this.boundingSphere.radius = Math.sqrt( maxRadiusSq );
  
					if ( isNaN( this.boundingSphere.radius ) ) {
  
						console.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this );
  
					}
  
				}
  
			};
  
		}(),
  
		computeFaceNormals: function () {
  
			// backwards compatibility
  
		},
  
		computeVertexNormals: function () {
  
			var index = this.index;
			var attributes = this.attributes;
			var groups = this.groups;
  
			if ( attributes.position ) {
  
				var positions = attributes.position.array;
  
				if ( attributes.normal === undefined ) {
  
					this.addAttribute( 'normal', new BufferAttribute( new Float32Array( positions.length ), 3 ) );
  
				} else {
  
					// reset existing normals to zero
  
					var array = attributes.normal.array;
  
					for ( var i = 0, il = array.length; i < il; i ++ ) {
  
						array[ i ] = 0;
  
					}
  
				}
  
				var normals = attributes.normal.array;
  
				var vA, vB, vC;
				var pA = new Vector3(), pB = new Vector3(), pC = new Vector3();
				var cb = new Vector3(), ab = new Vector3();
  
				// indexed elements
  
				if ( index ) {
  
					var indices = index.array;
  
					if ( groups.length === 0 ) {
  
						this.addGroup( 0, indices.length );
  
					}
  
					for ( var j = 0, jl = groups.length; j < jl; ++ j ) {
  
						var group = groups[ j ];
  
						var start = group.start;
						var count = group.count;
  
						for ( var i = start, il = start + count; i < il; i += 3 ) {
  
							vA = indices[ i + 0 ] * 3;
							vB = indices[ i + 1 ] * 3;
							vC = indices[ i + 2 ] * 3;
  
							pA.fromArray( positions, vA );
							pB.fromArray( positions, vB );
							pC.fromArray( positions, vC );
  
							cb.subVectors( pC, pB );
							ab.subVectors( pA, pB );
							cb.cross( ab );
  
							normals[ vA ] += cb.x;
							normals[ vA + 1 ] += cb.y;
							normals[ vA + 2 ] += cb.z;
  
							normals[ vB ] += cb.x;
							normals[ vB + 1 ] += cb.y;
							normals[ vB + 2 ] += cb.z;
  
							normals[ vC ] += cb.x;
							normals[ vC + 1 ] += cb.y;
							normals[ vC + 2 ] += cb.z;
  
						}
  
					}
  
				} else {
  
					// non-indexed elements (unconnected triangle soup)
  
					for ( var i = 0, il = positions.length; i < il; i += 9 ) {
  
						pA.fromArray( positions, i );
						pB.fromArray( positions, i + 3 );
						pC.fromArray( positions, i + 6 );
  
						cb.subVectors( pC, pB );
						ab.subVectors( pA, pB );
						cb.cross( ab );
  
						normals[ i ] = cb.x;
						normals[ i + 1 ] = cb.y;
						normals[ i + 2 ] = cb.z;
  
						normals[ i + 3 ] = cb.x;
						normals[ i + 4 ] = cb.y;
						normals[ i + 5 ] = cb.z;
  
						normals[ i + 6 ] = cb.x;
						normals[ i + 7 ] = cb.y;
						normals[ i + 8 ] = cb.z;
  
					}
  
				}
  
				this.normalizeNormals();
  
				attributes.normal.needsUpdate = true;
  
			}
  
		},
  
		merge: function ( geometry, offset ) {
  
			if ( ! ( geometry && geometry.isBufferGeometry ) ) {
  
				console.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );
				return;
  
			}
  
			if ( offset === undefined ) {
  
				offset = 0;
  
				console.warn(
					'THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. '
					+ 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.'
				);
  
			}
  
			var attributes = this.attributes;
  
			for ( var key in attributes ) {
  
				if ( geometry.attributes[ key ] === undefined ) continue;
  
				var attribute1 = attributes[ key ];
				var attributeArray1 = attribute1.array;
  
				var attribute2 = geometry.attributes[ key ];
				var attributeArray2 = attribute2.array;
  
				var attributeSize = attribute2.itemSize;
  
				for ( var i = 0, j = attributeSize * offset; i < attributeArray2.length; i ++, j ++ ) {
  
					attributeArray1[ j ] = attributeArray2[ i ];
  
				}
  
			}
  
			return this;
  
		},
  
		normalizeNormals: function () {
  
			var vector = new Vector3();
  
			return function normalizeNormals() {
  
				var normals = this.attributes.normal;
  
				for ( var i = 0, il = normals.count; i < il; i ++ ) {
  
					vector.x = normals.getX( i );
					vector.y = normals.getY( i );
					vector.z = normals.getZ( i );
  
					vector.normalize();
  
					normals.setXYZ( i, vector.x, vector.y, vector.z );
  
				}
  
			};
  
		}(),
  
		toNonIndexed: function () {
  
			if ( this.index === null ) {
  
				console.warn( 'THREE.BufferGeometry.toNonIndexed(): Geometry is already non-indexed.' );
				return this;
  
			}
  
			var geometry2 = new BufferGeometry();
  
			var indices = this.index.array;
			var attributes = this.attributes;
  
			for ( var name in attributes ) {
  
				var attribute = attributes[ name ];
  
				var array = attribute.array;
				var itemSize = attribute.itemSize;
  
				var array2 = new array.constructor( indices.length * itemSize );
  
				var index = 0, index2 = 0;
  
				for ( var i = 0, l = indices.length; i < l; i ++ ) {
  
					index = indices[ i ] * itemSize;
  
					for ( var j = 0; j < itemSize; j ++ ) {
  
						array2[ index2 ++ ] = array[ index ++ ];
  
					}
  
				}
  
				geometry2.addAttribute( name, new BufferAttribute( array2, itemSize ) );
  
			}
  
			var groups = this.groups;
  
			for ( var i = 0, l = groups.length; i < l; i ++ ) {
  
				var group = groups[ i ];
				geometry2.addGroup( group.start, group.count, group.materialIndex );
  
			}
  
			return geometry2;
  
		},
  
		toJSON: function () {
  
			var data = {
				metadata: {
					version: 4.5,
					type: 'BufferGeometry',
					generator: 'BufferGeometry.toJSON'
				}
			};
  
			// standard BufferGeometry serialization
  
			data.uuid = this.uuid;
			data.type = this.type;
			if ( this.name !== '' ) data.name = this.name;
			if ( Object.keys( this.userData ).length > 0 ) data.userData = this.userData;
  
			if ( this.parameters !== undefined ) {
  
				var parameters = this.parameters;
  
				for ( var key in parameters ) {
  
					if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];
  
				}
  
				return data;
  
			}
  
			data.data = { attributes: {} };
  
			var index = this.index;
  
			if ( index !== null ) {
  
				var array = Array.prototype.slice.call( index.array );
  
				data.data.index = {
					type: index.array.constructor.name,
					array: array
				};
  
			}
  
			var attributes = this.attributes;
  
			for ( var key in attributes ) {
  
				var attribute = attributes[ key ];
  
				var array = Array.prototype.slice.call( attribute.array );
  
				data.data.attributes[ key ] = {
					itemSize: attribute.itemSize,
					type: attribute.array.constructor.name,
					array: array,
					normalized: attribute.normalized
				};
  
			}
  
			var groups = this.groups;
  
			if ( groups.length > 0 ) {
  
				data.data.groups = JSON.parse( JSON.stringify( groups ) );
  
			}
  
			var boundingSphere = this.boundingSphere;
  
			if ( boundingSphere !== null ) {
  
				data.data.boundingSphere = {
					center: boundingSphere.center.toArray(),
					radius: boundingSphere.radius
				};
  
			}
  
			return data;
  
		},
  
		clone: function () {
  
			/*
			 // Handle primitives
  
			 var parameters = this.parameters;
  
			 if ( parameters !== undefined ) {
  
			 var values = [];
  
			 for ( var key in parameters ) {
  
			 values.push( parameters[ key ] );
  
			 }
  
			 var geometry = Object.create( this.constructor.prototype );
			 this.constructor.apply( geometry, values );
			 return geometry;
  
			 }
  
			 return new this.constructor().copy( this );
			 */
  
			return new BufferGeometry().copy( this );
  
		},
  
		copy: function ( source ) {
  
			var name, i, l;
  
			// reset
  
			this.index = null;
			this.attributes = {};
			this.morphAttributes = {};
			this.groups = [];
			this.boundingBox = null;
			this.boundingSphere = null;
  
			// name
  
			this.name = source.name;
  
			// index
  
			var index = source.index;
  
			if ( index !== null ) {
  
				this.setIndex( index.clone() );
  
			}
  
			// attributes
  
			var attributes = source.attributes;
  
			for ( name in attributes ) {
  
				var attribute = attributes[ name ];
				this.addAttribute( name, attribute.clone() );
  
			}
  
			// morph attributes
  
			var morphAttributes = source.morphAttributes;
  
			for ( name in morphAttributes ) {
  
				var array = [];
				var morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes
  
				for ( i = 0, l = morphAttribute.length; i < l; i ++ ) {
  
					array.push( morphAttribute[ i ].clone() );
  
				}
  
				this.morphAttributes[ name ] = array;
  
			}
  
			// groups
  
			var groups = source.groups;
  
			for ( i = 0, l = groups.length; i < l; i ++ ) {
  
				var group = groups[ i ];
				this.addGroup( group.start, group.count, group.materialIndex );
  
			}
  
			// bounding box
  
			var boundingBox = source.boundingBox;
  
			if ( boundingBox !== null ) {
  
				this.boundingBox = boundingBox.clone();
  
			}
  
			// bounding sphere
  
			var boundingSphere = source.boundingSphere;
  
			if ( boundingSphere !== null ) {
  
				this.boundingSphere = boundingSphere.clone();
  
			}
  
			// draw range
  
			this.drawRange.start = source.drawRange.start;
			this.drawRange.count = source.drawRange.count;
  
			// user data
  
			this.userData = source.userData;
  
			return this;
  
		},
  
		dispose: function () {
  
			this.dispatchEvent( { type: 'dispose' } );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// BoxGeometry
  
	function BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {
  
		Geometry.call( this );
  
		this.type = 'BoxGeometry';
  
		this.parameters = {
			width: width,
			height: height,
			depth: depth,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			depthSegments: depthSegments
		};
  
		this.fromBufferGeometry( new BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) );
		this.mergeVertices();
  
	}
  
	BoxGeometry.prototype = Object.create( Geometry.prototype );
	BoxGeometry.prototype.constructor = BoxGeometry;
  
	// BoxBufferGeometry
  
	function BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {
  
		BufferGeometry.call( this );
  
		this.type = 'BoxBufferGeometry';
  
		this.parameters = {
			width: width,
			height: height,
			depth: depth,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			depthSegments: depthSegments
		};
  
		var scope = this;
  
		width = width || 1;
		height = height || 1;
		depth = depth || 1;
  
		// segments
  
		widthSegments = Math.floor( widthSegments ) || 1;
		heightSegments = Math.floor( heightSegments ) || 1;
		depthSegments = Math.floor( depthSegments ) || 1;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var numberOfVertices = 0;
		var groupStart = 0;
  
		// build each side of the box geometry
  
		buildPlane( 'z', 'y', 'x', - 1, - 1, depth, height, width, depthSegments, heightSegments, 0 ); // px
		buildPlane( 'z', 'y', 'x', 1, - 1, depth, height, - width, depthSegments, heightSegments, 1 ); // nx
		buildPlane( 'x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2 ); // py
		buildPlane( 'x', 'z', 'y', 1, - 1, width, depth, - height, widthSegments, depthSegments, 3 ); // ny
		buildPlane( 'x', 'y', 'z', 1, - 1, width, height, depth, widthSegments, heightSegments, 4 ); // pz
		buildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth, widthSegments, heightSegments, 5 ); // nz
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
		function buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {
  
			var segmentWidth = width / gridX;
			var segmentHeight = height / gridY;
  
			var widthHalf = width / 2;
			var heightHalf = height / 2;
			var depthHalf = depth / 2;
  
			var gridX1 = gridX + 1;
			var gridY1 = gridY + 1;
  
			var vertexCounter = 0;
			var groupCount = 0;
  
			var ix, iy;
  
			var vector = new Vector3();
  
			// generate vertices, normals and uvs
  
			for ( iy = 0; iy < gridY1; iy ++ ) {
  
				var y = iy * segmentHeight - heightHalf;
  
				for ( ix = 0; ix < gridX1; ix ++ ) {
  
					var x = ix * segmentWidth - widthHalf;
  
					// set values to correct vector component
  
					vector[ u ] = x * udir;
					vector[ v ] = y * vdir;
					vector[ w ] = depthHalf;
  
					// now apply vector to vertex buffer
  
					vertices.push( vector.x, vector.y, vector.z );
  
					// set values to correct vector component
  
					vector[ u ] = 0;
					vector[ v ] = 0;
					vector[ w ] = depth > 0 ? 1 : - 1;
  
					// now apply vector to normal buffer
  
					normals.push( vector.x, vector.y, vector.z );
  
					// uvs
  
					uvs.push( ix / gridX );
					uvs.push( 1 - ( iy / gridY ) );
  
					// counters
  
					vertexCounter += 1;
  
				}
  
			}
  
			// indices
  
			// 1. you need three indices to draw a single face
			// 2. a single segment consists of two faces
			// 3. so we need to generate six (2*3) indices per segment
  
			for ( iy = 0; iy < gridY; iy ++ ) {
  
				for ( ix = 0; ix < gridX; ix ++ ) {
  
					var a = numberOfVertices + ix + gridX1 * iy;
					var b = numberOfVertices + ix + gridX1 * ( iy + 1 );
					var c = numberOfVertices + ( ix + 1 ) + gridX1 * ( iy + 1 );
					var d = numberOfVertices + ( ix + 1 ) + gridX1 * iy;
  
					// faces
  
					indices.push( a, b, d );
					indices.push( b, c, d );
  
					// increase counter
  
					groupCount += 6;
  
				}
  
			}
  
			// add a group to the geometry. this will ensure multi material support
  
			scope.addGroup( groupStart, groupCount, materialIndex );
  
			// calculate new start value for groups
  
			groupStart += groupCount;
  
			// update total number of vertices
  
			numberOfVertices += vertexCounter;
  
		}
  
	}
  
	BoxBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	BoxBufferGeometry.prototype.constructor = BoxBufferGeometry;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// PlaneGeometry
  
	function PlaneGeometry( width, height, widthSegments, heightSegments ) {
  
		Geometry.call( this );
  
		this.type = 'PlaneGeometry';
  
		this.parameters = {
			width: width,
			height: height,
			widthSegments: widthSegments,
			heightSegments: heightSegments
		};
  
		this.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );
		this.mergeVertices();
  
	}
  
	PlaneGeometry.prototype = Object.create( Geometry.prototype );
	PlaneGeometry.prototype.constructor = PlaneGeometry;
  
	// PlaneBufferGeometry
  
	function PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {
  
		BufferGeometry.call( this );
  
		this.type = 'PlaneBufferGeometry';
  
		this.parameters = {
			width: width,
			height: height,
			widthSegments: widthSegments,
			heightSegments: heightSegments
		};
  
		width = width || 1;
		height = height || 1;
  
		var width_half = width / 2;
		var height_half = height / 2;
  
		var gridX = Math.floor( widthSegments ) || 1;
		var gridY = Math.floor( heightSegments ) || 1;
  
		var gridX1 = gridX + 1;
		var gridY1 = gridY + 1;
  
		var segment_width = width / gridX;
		var segment_height = height / gridY;
  
		var ix, iy;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// generate vertices, normals and uvs
  
		for ( iy = 0; iy < gridY1; iy ++ ) {
  
			var y = iy * segment_height - height_half;
  
			for ( ix = 0; ix < gridX1; ix ++ ) {
  
				var x = ix * segment_width - width_half;
  
				vertices.push( x, - y, 0 );
  
				normals.push( 0, 0, 1 );
  
				uvs.push( ix / gridX );
				uvs.push( 1 - ( iy / gridY ) );
  
			}
  
		}
  
		// indices
  
		for ( iy = 0; iy < gridY; iy ++ ) {
  
			for ( ix = 0; ix < gridX; ix ++ ) {
  
				var a = ix + gridX1 * iy;
				var b = ix + gridX1 * ( iy + 1 );
				var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
				var d = ( ix + 1 ) + gridX1 * iy;
  
				// faces
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	PlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	PlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	var materialId = 0;
  
	function Material() {
  
		Object.defineProperty( this, 'id', { value: materialId ++ } );
  
		this.uuid = _Math.generateUUID();
  
		this.name = '';
		this.type = 'Material';
  
		this.fog = true;
		this.lights = true;
  
		this.blending = NormalBlending;
		this.side = FrontSide;
		this.flatShading = false;
		this.vertexColors = NoColors; // THREE.NoColors, THREE.VertexColors, THREE.FaceColors
  
		this.opacity = 1;
		this.transparent = false;
  
		this.blendSrc = SrcAlphaFactor;
		this.blendDst = OneMinusSrcAlphaFactor;
		this.blendEquation = AddEquation;
		this.blendSrcAlpha = null;
		this.blendDstAlpha = null;
		this.blendEquationAlpha = null;
  
		this.depthFunc = LessEqualDepth;
		this.depthTest = true;
		this.depthWrite = true;
  
		this.clippingPlanes = null;
		this.clipIntersection = false;
		this.clipShadows = false;
  
		this.shadowSide = null;
  
		this.colorWrite = true;
  
		this.precision = null; // override the renderer's default precision for this material
  
		this.polygonOffset = false;
		this.polygonOffsetFactor = 0;
		this.polygonOffsetUnits = 0;
  
		this.dithering = false;
  
		this.alphaTest = 0;
		this.premultipliedAlpha = false;
  
		this.overdraw = 0; // Overdrawn pixels (typically between 0 and 1) for fixing antialiasing gaps in CanvasRenderer
  
		this.visible = true;
  
		this.userData = {};
  
		this.needsUpdate = true;
  
	}
  
	Material.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: Material,
  
		isMaterial: true,
  
		onBeforeCompile: function () {},
  
		setValues: function ( values ) {
  
			if ( values === undefined ) return;
  
			for ( var key in values ) {
  
				var newValue = values[ key ];
  
				if ( newValue === undefined ) {
  
					console.warn( "THREE.Material: '" + key + "' parameter is undefined." );
					continue;
  
				}
  
				// for backward compatability if shading is set in the constructor
				if ( key === 'shading' ) {
  
					console.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
					this.flatShading = ( newValue === FlatShading ) ? true : false;
					continue;
  
				}
  
				var currentValue = this[ key ];
  
				if ( currentValue === undefined ) {
  
					console.warn( "THREE." + this.type + ": '" + key + "' is not a property of this material." );
					continue;
  
				}
  
				if ( currentValue && currentValue.isColor ) {
  
					currentValue.set( newValue );
  
				} else if ( ( currentValue && currentValue.isVector3 ) && ( newValue && newValue.isVector3 ) ) {
  
					currentValue.copy( newValue );
  
				} else if ( key === 'overdraw' ) {
  
					// ensure overdraw is backwards-compatible with legacy boolean type
					this[ key ] = Number( newValue );
  
				} else {
  
					this[ key ] = newValue;
  
				}
  
			}
  
		},
  
		toJSON: function ( meta ) {
  
			var isRoot = ( meta === undefined || typeof meta === 'string' );
  
			if ( isRoot ) {
  
				meta = {
					textures: {},
					images: {}
				};
  
			}
  
			var data = {
				metadata: {
					version: 4.5,
					type: 'Material',
					generator: 'Material.toJSON'
				}
			};
  
			// standard Material serialization
			data.uuid = this.uuid;
			data.type = this.type;
  
			if ( this.name !== '' ) data.name = this.name;
  
			if ( this.color && this.color.isColor ) data.color = this.color.getHex();
  
			if ( this.roughness !== undefined ) data.roughness = this.roughness;
			if ( this.metalness !== undefined ) data.metalness = this.metalness;
  
			if ( this.emissive && this.emissive.isColor ) data.emissive = this.emissive.getHex();
			if ( this.emissiveIntensity !== 1 ) data.emissiveIntensity = this.emissiveIntensity;
  
			if ( this.specular && this.specular.isColor ) data.specular = this.specular.getHex();
			if ( this.shininess !== undefined ) data.shininess = this.shininess;
			if ( this.clearCoat !== undefined ) data.clearCoat = this.clearCoat;
			if ( this.clearCoatRoughness !== undefined ) data.clearCoatRoughness = this.clearCoatRoughness;
  
			if ( this.map && this.map.isTexture ) data.map = this.map.toJSON( meta ).uuid;
			if ( this.alphaMap && this.alphaMap.isTexture ) data.alphaMap = this.alphaMap.toJSON( meta ).uuid;
			if ( this.lightMap && this.lightMap.isTexture ) data.lightMap = this.lightMap.toJSON( meta ).uuid;
  
			if ( this.aoMap && this.aoMap.isTexture ) {
  
				data.aoMap = this.aoMap.toJSON( meta ).uuid;
				data.aoMapIntensity = this.aoMapIntensity;
  
			}
  
			if ( this.bumpMap && this.bumpMap.isTexture ) {
  
				data.bumpMap = this.bumpMap.toJSON( meta ).uuid;
				data.bumpScale = this.bumpScale;
  
			}
  
			if ( this.normalMap && this.normalMap.isTexture ) {
  
				data.normalMap = this.normalMap.toJSON( meta ).uuid;
				data.normalScale = this.normalScale.toArray();
  
			}
  
			if ( this.displacementMap && this.displacementMap.isTexture ) {
  
				data.displacementMap = this.displacementMap.toJSON( meta ).uuid;
				data.displacementScale = this.displacementScale;
				data.displacementBias = this.displacementBias;
  
			}
  
			if ( this.roughnessMap && this.roughnessMap.isTexture ) data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid;
			if ( this.metalnessMap && this.metalnessMap.isTexture ) data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid;
  
			if ( this.emissiveMap && this.emissiveMap.isTexture ) data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid;
			if ( this.specularMap && this.specularMap.isTexture ) data.specularMap = this.specularMap.toJSON( meta ).uuid;
  
			if ( this.envMap && this.envMap.isTexture ) {
  
				data.envMap = this.envMap.toJSON( meta ).uuid;
				data.reflectivity = this.reflectivity; // Scale behind envMap
  
			}
  
			if ( this.gradientMap && this.gradientMap.isTexture ) {
  
				data.gradientMap = this.gradientMap.toJSON( meta ).uuid;
  
			}
  
			if ( this.size !== undefined ) data.size = this.size;
			if ( this.sizeAttenuation !== undefined ) data.sizeAttenuation = this.sizeAttenuation;
  
			if ( this.blending !== NormalBlending ) data.blending = this.blending;
			if ( this.flatShading === true ) data.flatShading = this.flatShading;
			if ( this.side !== FrontSide ) data.side = this.side;
			if ( this.vertexColors !== NoColors ) data.vertexColors = this.vertexColors;
  
			if ( this.opacity < 1 ) data.opacity = this.opacity;
			if ( this.transparent === true ) data.transparent = this.transparent;
  
			data.depthFunc = this.depthFunc;
			data.depthTest = this.depthTest;
			data.depthWrite = this.depthWrite;
  
			// rotation (SpriteMaterial)
			if ( this.rotation !== 0 ) data.rotation = this.rotation;
  
			if ( this.linewidth !== 1 ) data.linewidth = this.linewidth;
			if ( this.dashSize !== undefined ) data.dashSize = this.dashSize;
			if ( this.gapSize !== undefined ) data.gapSize = this.gapSize;
			if ( this.scale !== undefined ) data.scale = this.scale;
  
			if ( this.dithering === true ) data.dithering = true;
  
			if ( this.alphaTest > 0 ) data.alphaTest = this.alphaTest;
			if ( this.premultipliedAlpha === true ) data.premultipliedAlpha = this.premultipliedAlpha;
  
			if ( this.wireframe === true ) data.wireframe = this.wireframe;
			if ( this.wireframeLinewidth > 1 ) data.wireframeLinewidth = this.wireframeLinewidth;
			if ( this.wireframeLinecap !== 'round' ) data.wireframeLinecap = this.wireframeLinecap;
			if ( this.wireframeLinejoin !== 'round' ) data.wireframeLinejoin = this.wireframeLinejoin;
  
			if ( this.morphTargets === true ) data.morphTargets = true;
			if ( this.skinning === true ) data.skinning = true;
  
			if ( this.visible === false ) data.visible = false;
			if ( JSON.stringify( this.userData ) !== '{}' ) data.userData = this.userData;
  
			// TODO: Copied from Object3D.toJSON
  
			function extractFromCache( cache ) {
  
				var values = [];
  
				for ( var key in cache ) {
  
					var data = cache[ key ];
					delete data.metadata;
					values.push( data );
  
				}
  
				return values;
  
			}
  
			if ( isRoot ) {
  
				var textures = extractFromCache( meta.textures );
				var images = extractFromCache( meta.images );
  
				if ( textures.length > 0 ) data.textures = textures;
				if ( images.length > 0 ) data.images = images;
  
			}
  
			return data;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( source ) {
  
			this.name = source.name;
  
			this.fog = source.fog;
			this.lights = source.lights;
  
			this.blending = source.blending;
			this.side = source.side;
			this.flatShading = source.flatShading;
			this.vertexColors = source.vertexColors;
  
			this.opacity = source.opacity;
			this.transparent = source.transparent;
  
			this.blendSrc = source.blendSrc;
			this.blendDst = source.blendDst;
			this.blendEquation = source.blendEquation;
			this.blendSrcAlpha = source.blendSrcAlpha;
			this.blendDstAlpha = source.blendDstAlpha;
			this.blendEquationAlpha = source.blendEquationAlpha;
  
			this.depthFunc = source.depthFunc;
			this.depthTest = source.depthTest;
			this.depthWrite = source.depthWrite;
  
			this.colorWrite = source.colorWrite;
  
			this.precision = source.precision;
  
			this.polygonOffset = source.polygonOffset;
			this.polygonOffsetFactor = source.polygonOffsetFactor;
			this.polygonOffsetUnits = source.polygonOffsetUnits;
  
			this.dithering = source.dithering;
  
			this.alphaTest = source.alphaTest;
			this.premultipliedAlpha = source.premultipliedAlpha;
  
			this.overdraw = source.overdraw;
  
			this.visible = source.visible;
			this.userData = JSON.parse( JSON.stringify( source.userData ) );
  
			this.clipShadows = source.clipShadows;
			this.clipIntersection = source.clipIntersection;
  
			var srcPlanes = source.clippingPlanes,
				dstPlanes = null;
  
			if ( srcPlanes !== null ) {
  
				var n = srcPlanes.length;
				dstPlanes = new Array( n );
  
				for ( var i = 0; i !== n; ++ i )
					dstPlanes[ i ] = srcPlanes[ i ].clone();
  
			}
  
			this.clippingPlanes = dstPlanes;
  
			this.shadowSide = source.shadowSide;
  
			return this;
  
		},
  
		dispose: function () {
  
			this.dispatchEvent( { type: 'dispose' } );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  depthTest: <bool>,
	 *  depthWrite: <bool>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>
	 * }
	 */
  
	function MeshBasicMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshBasicMaterial';
  
		this.color = new Color( 0xffffff ); // emissive
  
		this.map = null;
  
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
  
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
  
		this.specularMap = null;
  
		this.alphaMap = null;
  
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
  
		this.skinning = false;
		this.morphTargets = false;
  
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	MeshBasicMaterial.prototype = Object.create( Material.prototype );
	MeshBasicMaterial.prototype.constructor = MeshBasicMaterial;
  
	MeshBasicMaterial.prototype.isMeshBasicMaterial = true;
  
	MeshBasicMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
  
		this.map = source.map;
  
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
  
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
  
		this.specularMap = source.specularMap;
  
		this.alphaMap = source.alphaMap;
  
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
  
		return this;
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  defines: { "label" : "value" },
	 *  uniforms: { "parameter1": { value: 1.0 }, "parameter2": { value2: 2 } },
	 *
	 *  fragmentShader: <string>,
	 *  vertexShader: <string>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  lights: <bool>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */
  
	function ShaderMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'ShaderMaterial';
  
		this.defines = {};
		this.uniforms = {};
  
		this.vertexShader = 'void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}';
		this.fragmentShader = 'void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}';
  
		this.linewidth = 1;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
  
		this.fog = false; // set to use scene fog
		this.lights = false; // set to use scene lights
		this.clipping = false; // set to use user-defined clipping planes
  
		this.skinning = false; // set to use skinning attribute streams
		this.morphTargets = false; // set to use morph targets
		this.morphNormals = false; // set to use morph normals
  
		this.extensions = {
			derivatives: false, // set to use derivatives
			fragDepth: false, // set to use fragment depth values
			drawBuffers: false, // set to use draw buffers
			shaderTextureLOD: false // set to use shader texture LOD
		};
  
		// When rendered geometry doesn't include these attributes but the material does,
		// use these default values in WebGL. This avoids errors when buffer data is missing.
		this.defaultAttributeValues = {
			'color': [ 1, 1, 1 ],
			'uv': [ 0, 0 ],
			'uv2': [ 0, 0 ]
		};
  
		this.index0AttributeName = undefined;
		this.uniformsNeedUpdate = false;
  
		if ( parameters !== undefined ) {
  
			if ( parameters.attributes !== undefined ) {
  
				console.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );
  
			}
  
			this.setValues( parameters );
  
		}
  
	}
  
	ShaderMaterial.prototype = Object.create( Material.prototype );
	ShaderMaterial.prototype.constructor = ShaderMaterial;
  
	ShaderMaterial.prototype.isShaderMaterial = true;
  
	ShaderMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.fragmentShader = source.fragmentShader;
		this.vertexShader = source.vertexShader;
  
		this.uniforms = UniformsUtils.clone( source.uniforms );
  
		this.defines = Object.assign( {}, source.defines );
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
  
		this.lights = source.lights;
		this.clipping = source.clipping;
  
		this.skinning = source.skinning;
  
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
  
		this.extensions = source.extensions;
  
		return this;
  
	};
  
	ShaderMaterial.prototype.toJSON = function ( meta ) {
  
		var data = Material.prototype.toJSON.call( this, meta );
  
		data.uniforms = this.uniforms;
		data.vertexShader = this.vertexShader;
		data.fragmentShader = this.fragmentShader;
  
		return data;
  
	};
  
	/**
	 * @author bhouston / http://clara.io
	 */
  
	function Ray( origin, direction ) {
  
		this.origin = ( origin !== undefined ) ? origin : new Vector3();
		this.direction = ( direction !== undefined ) ? direction : new Vector3();
  
	}
  
	Object.assign( Ray.prototype, {
  
		set: function ( origin, direction ) {
  
			this.origin.copy( origin );
			this.direction.copy( direction );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( ray ) {
  
			this.origin.copy( ray.origin );
			this.direction.copy( ray.direction );
  
			return this;
  
		},
  
		at: function ( t, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Ray: .at() target is now required' );
				target = new Vector3();
  
			}
  
			return target.copy( this.direction ).multiplyScalar( t ).add( this.origin );
  
		},
  
		lookAt: function ( v ) {
  
			this.direction.copy( v ).sub( this.origin ).normalize();
  
			return this;
  
		},
  
		recast: function () {
  
			var v1 = new Vector3();
  
			return function recast( t ) {
  
				this.origin.copy( this.at( t, v1 ) );
  
				return this;
  
			};
  
		}(),
  
		closestPointToPoint: function ( point, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Ray: .closestPointToPoint() target is now required' );
				target = new Vector3();
  
			}
  
			target.subVectors( point, this.origin );
  
			var directionDistance = target.dot( this.direction );
  
			if ( directionDistance < 0 ) {
  
				return target.copy( this.origin );
  
			}
  
			return target.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );
  
		},
  
		distanceToPoint: function ( point ) {
  
			return Math.sqrt( this.distanceSqToPoint( point ) );
  
		},
  
		distanceSqToPoint: function () {
  
			var v1 = new Vector3();
  
			return function distanceSqToPoint( point ) {
  
				var directionDistance = v1.subVectors( point, this.origin ).dot( this.direction );
  
				// point behind the ray
  
				if ( directionDistance < 0 ) {
  
					return this.origin.distanceToSquared( point );
  
				}
  
				v1.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );
  
				return v1.distanceToSquared( point );
  
			};
  
		}(),
  
		distanceSqToSegment: function () {
  
			var segCenter = new Vector3();
			var segDir = new Vector3();
			var diff = new Vector3();
  
			return function distanceSqToSegment( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {
  
				// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h
				// It returns the min distance between the ray and the segment
				// defined by v0 and v1
				// It can also set two optional targets :
				// - The closest point on the ray
				// - The closest point on the segment
  
				segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );
				segDir.copy( v1 ).sub( v0 ).normalize();
				diff.copy( this.origin ).sub( segCenter );
  
				var segExtent = v0.distanceTo( v1 ) * 0.5;
				var a01 = - this.direction.dot( segDir );
				var b0 = diff.dot( this.direction );
				var b1 = - diff.dot( segDir );
				var c = diff.lengthSq();
				var det = Math.abs( 1 - a01 * a01 );
				var s0, s1, sqrDist, extDet;
  
				if ( det > 0 ) {
  
					// The ray and segment are not parallel.
  
					s0 = a01 * b1 - b0;
					s1 = a01 * b0 - b1;
					extDet = segExtent * det;
  
					if ( s0 >= 0 ) {
  
						if ( s1 >= - extDet ) {
  
							if ( s1 <= extDet ) {
  
								// region 0
								// Minimum at interior points of ray and segment.
  
								var invDet = 1 / det;
								s0 *= invDet;
								s1 *= invDet;
								sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;
  
							} else {
  
								// region 1
  
								s1 = segExtent;
								s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
								sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
  
							}
  
						} else {
  
							// region 5
  
							s1 = - segExtent;
							s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
  
						}
  
					} else {
  
						if ( s1 <= - extDet ) {
  
							// region 4
  
							s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );
							s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
  
						} else if ( s1 <= extDet ) {
  
							// region 3
  
							s0 = 0;
							s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = s1 * ( s1 + 2 * b1 ) + c;
  
						} else {
  
							// region 2
  
							s0 = Math.max( 0, - ( a01 * segExtent + b0 ) );
							s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
  
						}
  
					}
  
				} else {
  
					// Ray and segment are parallel.
  
					s1 = ( a01 > 0 ) ? - segExtent : segExtent;
					s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
					sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
  
				}
  
				if ( optionalPointOnRay ) {
  
					optionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );
  
				}
  
				if ( optionalPointOnSegment ) {
  
					optionalPointOnSegment.copy( segDir ).multiplyScalar( s1 ).add( segCenter );
  
				}
  
				return sqrDist;
  
			};
  
		}(),
  
		intersectSphere: function () {
  
			var v1 = new Vector3();
  
			return function intersectSphere( sphere, target ) {
  
				v1.subVectors( sphere.center, this.origin );
				var tca = v1.dot( this.direction );
				var d2 = v1.dot( v1 ) - tca * tca;
				var radius2 = sphere.radius * sphere.radius;
  
				if ( d2 > radius2 ) return null;
  
				var thc = Math.sqrt( radius2 - d2 );
  
				// t0 = first intersect point - entrance on front of sphere
				var t0 = tca - thc;
  
				// t1 = second intersect point - exit point on back of sphere
				var t1 = tca + thc;
  
				// test to see if both t0 and t1 are behind the ray - if so, return null
				if ( t0 < 0 && t1 < 0 ) return null;
  
				// test to see if t0 is behind the ray:
				// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
				// in order to always return an intersect point that is in front of the ray.
				if ( t0 < 0 ) return this.at( t1, target );
  
				// else t0 is in front of the ray, so return the first collision point scaled by t0
				return this.at( t0, target );
  
			};
  
		}(),
  
		intersectsSphere: function ( sphere ) {
  
			return this.distanceToPoint( sphere.center ) <= sphere.radius;
  
		},
  
		distanceToPlane: function ( plane ) {
  
			var denominator = plane.normal.dot( this.direction );
  
			if ( denominator === 0 ) {
  
				// line is coplanar, return origin
				if ( plane.distanceToPoint( this.origin ) === 0 ) {
  
					return 0;
  
				}
  
				// Null is preferable to undefined since undefined means.... it is undefined
  
				return null;
  
			}
  
			var t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;
  
			// Return if the ray never intersects the plane
  
			return t >= 0 ? t : null;
  
		},
  
		intersectPlane: function ( plane, target ) {
  
			var t = this.distanceToPlane( plane );
  
			if ( t === null ) {
  
				return null;
  
			}
  
			return this.at( t, target );
  
		},
  
		intersectsPlane: function ( plane ) {
  
			// check if the ray lies on the plane first
  
			var distToPoint = plane.distanceToPoint( this.origin );
  
			if ( distToPoint === 0 ) {
  
				return true;
  
			}
  
			var denominator = plane.normal.dot( this.direction );
  
			if ( denominator * distToPoint < 0 ) {
  
				return true;
  
			}
  
			// ray origin is behind the plane (and is pointing behind it)
  
			return false;
  
		},
  
		intersectBox: function ( box, target ) {
  
			var tmin, tmax, tymin, tymax, tzmin, tzmax;
  
			var invdirx = 1 / this.direction.x,
				invdiry = 1 / this.direction.y,
				invdirz = 1 / this.direction.z;
  
			var origin = this.origin;
  
			if ( invdirx >= 0 ) {
  
				tmin = ( box.min.x - origin.x ) * invdirx;
				tmax = ( box.max.x - origin.x ) * invdirx;
  
			} else {
  
				tmin = ( box.max.x - origin.x ) * invdirx;
				tmax = ( box.min.x - origin.x ) * invdirx;
  
			}
  
			if ( invdiry >= 0 ) {
  
				tymin = ( box.min.y - origin.y ) * invdiry;
				tymax = ( box.max.y - origin.y ) * invdiry;
  
			} else {
  
				tymin = ( box.max.y - origin.y ) * invdiry;
				tymax = ( box.min.y - origin.y ) * invdiry;
  
			}
  
			if ( ( tmin > tymax ) || ( tymin > tmax ) ) return null;
  
			// These lines also handle the case where tmin or tmax is NaN
			// (result of 0 * Infinity). x !== x returns true if x is NaN
  
			if ( tymin > tmin || tmin !== tmin ) tmin = tymin;
  
			if ( tymax < tmax || tmax !== tmax ) tmax = tymax;
  
			if ( invdirz >= 0 ) {
  
				tzmin = ( box.min.z - origin.z ) * invdirz;
				tzmax = ( box.max.z - origin.z ) * invdirz;
  
			} else {
  
				tzmin = ( box.max.z - origin.z ) * invdirz;
				tzmax = ( box.min.z - origin.z ) * invdirz;
  
			}
  
			if ( ( tmin > tzmax ) || ( tzmin > tmax ) ) return null;
  
			if ( tzmin > tmin || tmin !== tmin ) tmin = tzmin;
  
			if ( tzmax < tmax || tmax !== tmax ) tmax = tzmax;
  
			//return point closest to the ray (positive side)
  
			if ( tmax < 0 ) return null;
  
			return this.at( tmin >= 0 ? tmin : tmax, target );
  
		},
  
		intersectsBox: ( function () {
  
			var v = new Vector3();
  
			return function intersectsBox( box ) {
  
				return this.intersectBox( box, v ) !== null;
  
			};
  
		} )(),
  
		intersectTriangle: function () {
  
			// Compute the offset origin, edges, and normal.
			var diff = new Vector3();
			var edge1 = new Vector3();
			var edge2 = new Vector3();
			var normal = new Vector3();
  
			return function intersectTriangle( a, b, c, backfaceCulling, target ) {
  
				// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h
  
				edge1.subVectors( b, a );
				edge2.subVectors( c, a );
				normal.crossVectors( edge1, edge2 );
  
				// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
				// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
				//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
				//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
				//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)
				var DdN = this.direction.dot( normal );
				var sign;
  
				if ( DdN > 0 ) {
  
					if ( backfaceCulling ) return null;
					sign = 1;
  
				} else if ( DdN < 0 ) {
  
					sign = - 1;
					DdN = - DdN;
  
				} else {
  
					return null;
  
				}
  
				diff.subVectors( this.origin, a );
				var DdQxE2 = sign * this.direction.dot( edge2.crossVectors( diff, edge2 ) );
  
				// b1 < 0, no intersection
				if ( DdQxE2 < 0 ) {
  
					return null;
  
				}
  
				var DdE1xQ = sign * this.direction.dot( edge1.cross( diff ) );
  
				// b2 < 0, no intersection
				if ( DdE1xQ < 0 ) {
  
					return null;
  
				}
  
				// b1+b2 > 1, no intersection
				if ( DdQxE2 + DdE1xQ > DdN ) {
  
					return null;
  
				}
  
				// Line intersects triangle, check if ray does.
				var QdN = - sign * diff.dot( normal );
  
				// t < 0, no intersection
				if ( QdN < 0 ) {
  
					return null;
  
				}
  
				// Ray intersects triangle.
				return this.at( QdN / DdN, target );
  
			};
  
		}(),
  
		applyMatrix4: function ( matrix4 ) {
  
			this.origin.applyMatrix4( matrix4 );
			this.direction.transformDirection( matrix4 );
  
			return this;
  
		},
  
		equals: function ( ray ) {
  
			return ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 */
  
	function Line3( start, end ) {
  
		this.start = ( start !== undefined ) ? start : new Vector3();
		this.end = ( end !== undefined ) ? end : new Vector3();
  
	}
  
	Object.assign( Line3.prototype, {
  
		set: function ( start, end ) {
  
			this.start.copy( start );
			this.end.copy( end );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( line ) {
  
			this.start.copy( line.start );
			this.end.copy( line.end );
  
			return this;
  
		},
  
		getCenter: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Line3: .getCenter() target is now required' );
				target = new Vector3();
  
			}
  
			return target.addVectors( this.start, this.end ).multiplyScalar( 0.5 );
  
		},
  
		delta: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Line3: .delta() target is now required' );
				target = new Vector3();
  
			}
  
			return target.subVectors( this.end, this.start );
  
		},
  
		distanceSq: function () {
  
			return this.start.distanceToSquared( this.end );
  
		},
  
		distance: function () {
  
			return this.start.distanceTo( this.end );
  
		},
  
		at: function ( t, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Line3: .at() target is now required' );
				target = new Vector3();
  
			}
  
			return this.delta( target ).multiplyScalar( t ).add( this.start );
  
		},
  
		closestPointToPointParameter: function () {
  
			var startP = new Vector3();
			var startEnd = new Vector3();
  
			return function closestPointToPointParameter( point, clampToLine ) {
  
				startP.subVectors( point, this.start );
				startEnd.subVectors( this.end, this.start );
  
				var startEnd2 = startEnd.dot( startEnd );
				var startEnd_startP = startEnd.dot( startP );
  
				var t = startEnd_startP / startEnd2;
  
				if ( clampToLine ) {
  
					t = _Math.clamp( t, 0, 1 );
  
				}
  
				return t;
  
			};
  
		}(),
  
		closestPointToPoint: function ( point, clampToLine, target ) {
  
			var t = this.closestPointToPointParameter( point, clampToLine );
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Line3: .closestPointToPoint() target is now required' );
				target = new Vector3();
  
			}
  
			return this.delta( target ).multiplyScalar( t ).add( this.start );
  
		},
  
		applyMatrix4: function ( matrix ) {
  
			this.start.applyMatrix4( matrix );
			this.end.applyMatrix4( matrix );
  
			return this;
  
		},
  
		equals: function ( line ) {
  
			return line.start.equals( this.start ) && line.end.equals( this.end );
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Triangle( a, b, c ) {
  
		this.a = ( a !== undefined ) ? a : new Vector3();
		this.b = ( b !== undefined ) ? b : new Vector3();
		this.c = ( c !== undefined ) ? c : new Vector3();
  
	}
  
	Object.assign( Triangle, {
  
		getNormal: function () {
  
			var v0 = new Vector3();
  
			return function getNormal( a, b, c, target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Triangle: .getNormal() target is now required' );
					target = new Vector3();
  
				}
  
				target.subVectors( c, b );
				v0.subVectors( a, b );
				target.cross( v0 );
  
				var targetLengthSq = target.lengthSq();
				if ( targetLengthSq > 0 ) {
  
					return target.multiplyScalar( 1 / Math.sqrt( targetLengthSq ) );
  
				}
  
				return target.set( 0, 0, 0 );
  
			};
  
		}(),
  
		// static/instance method to calculate barycentric coordinates
		// based on: http://www.blackpawn.com/texts/pointinpoly/default.html
		getBarycoord: function () {
  
			var v0 = new Vector3();
			var v1 = new Vector3();
			var v2 = new Vector3();
  
			return function getBarycoord( point, a, b, c, target ) {
  
				v0.subVectors( c, a );
				v1.subVectors( b, a );
				v2.subVectors( point, a );
  
				var dot00 = v0.dot( v0 );
				var dot01 = v0.dot( v1 );
				var dot02 = v0.dot( v2 );
				var dot11 = v1.dot( v1 );
				var dot12 = v1.dot( v2 );
  
				var denom = ( dot00 * dot11 - dot01 * dot01 );
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Triangle: .getBarycoord() target is now required' );
					target = new Vector3();
  
				}
  
				// collinear or singular triangle
				if ( denom === 0 ) {
  
					// arbitrary location outside of triangle?
					// not sure if this is the best idea, maybe should be returning undefined
					return target.set( - 2, - 1, - 1 );
  
				}
  
				var invDenom = 1 / denom;
				var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;
				var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;
  
				// barycentric coordinates must always sum to 1
				return target.set( 1 - u - v, v, u );
  
			};
  
		}(),
  
		containsPoint: function () {
  
			var v1 = new Vector3();
  
			return function containsPoint( point, a, b, c ) {
  
				Triangle.getBarycoord( point, a, b, c, v1 );
  
				return ( v1.x >= 0 ) && ( v1.y >= 0 ) && ( ( v1.x + v1.y ) <= 1 );
  
			};
  
		}()
  
	} );
  
	Object.assign( Triangle.prototype, {
  
		set: function ( a, b, c ) {
  
			this.a.copy( a );
			this.b.copy( b );
			this.c.copy( c );
  
			return this;
  
		},
  
		setFromPointsAndIndices: function ( points, i0, i1, i2 ) {
  
			this.a.copy( points[ i0 ] );
			this.b.copy( points[ i1 ] );
			this.c.copy( points[ i2 ] );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( triangle ) {
  
			this.a.copy( triangle.a );
			this.b.copy( triangle.b );
			this.c.copy( triangle.c );
  
			return this;
  
		},
  
		getArea: function () {
  
			var v0 = new Vector3();
			var v1 = new Vector3();
  
			return function getArea() {
  
				v0.subVectors( this.c, this.b );
				v1.subVectors( this.a, this.b );
  
				return v0.cross( v1 ).length() * 0.5;
  
			};
  
		}(),
  
		getMidpoint: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Triangle: .getMidpoint() target is now required' );
				target = new Vector3();
  
			}
  
			return target.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );
  
		},
  
		getNormal: function ( target ) {
  
			return Triangle.getNormal( this.a, this.b, this.c, target );
  
		},
  
		getPlane: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Triangle: .getPlane() target is now required' );
				target = new Vector3();
  
			}
  
			return target.setFromCoplanarPoints( this.a, this.b, this.c );
  
		},
  
		getBarycoord: function ( point, target ) {
  
			return Triangle.getBarycoord( point, this.a, this.b, this.c, target );
  
		},
  
		containsPoint: function ( point ) {
  
			return Triangle.containsPoint( point, this.a, this.b, this.c );
  
		},
  
		intersectsBox: function ( box ) {
  
			return box.intersectsTriangle( this );
  
		},
  
		closestPointToPoint: function () {
  
			var plane = new Plane();
			var edgeList = [ new Line3(), new Line3(), new Line3() ];
			var projectedPoint = new Vector3();
			var closestPoint = new Vector3();
  
			return function closestPointToPoint( point, target ) {
  
				if ( target === undefined ) {
  
					console.warn( 'THREE.Triangle: .closestPointToPoint() target is now required' );
					target = new Vector3();
  
				}
  
				var minDistance = Infinity;
  
				// project the point onto the plane of the triangle
  
				plane.setFromCoplanarPoints( this.a, this.b, this.c );
				plane.projectPoint( point, projectedPoint );
  
				// check if the projection lies within the triangle
  
				if ( this.containsPoint( projectedPoint ) === true ) {
  
					// if so, this is the closest point
  
					target.copy( projectedPoint );
  
				} else {
  
					// if not, the point falls outside the triangle. the target is the closest point to the triangle's edges or vertices
  
					edgeList[ 0 ].set( this.a, this.b );
					edgeList[ 1 ].set( this.b, this.c );
					edgeList[ 2 ].set( this.c, this.a );
  
					for ( var i = 0; i < edgeList.length; i ++ ) {
  
						edgeList[ i ].closestPointToPoint( projectedPoint, true, closestPoint );
  
						var distance = projectedPoint.distanceToSquared( closestPoint );
  
						if ( distance < minDistance ) {
  
							minDistance = distance;
  
							target.copy( closestPoint );
  
						}
  
					}
  
				}
  
				return target;
  
			};
  
		}(),
  
		equals: function ( triangle ) {
  
			return triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author jonobr1 / http://jonobr1.com/
	 */
  
	function Mesh( geometry, material ) {
  
		Object3D.call( this );
  
		this.type = 'Mesh';
  
		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new MeshBasicMaterial( { color: Math.random() * 0xffffff } );
  
		this.drawMode = TrianglesDrawMode;
  
		this.updateMorphTargets();
  
	}
  
	Mesh.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Mesh,
  
		isMesh: true,
  
		setDrawMode: function ( value ) {
  
			this.drawMode = value;
  
		},
  
		copy: function ( source ) {
  
			Object3D.prototype.copy.call( this, source );
  
			this.drawMode = source.drawMode;
  
			if ( source.morphTargetInfluences !== undefined ) {
  
				this.morphTargetInfluences = source.morphTargetInfluences.slice();
  
			}
  
			if ( source.morphTargetDictionary !== undefined ) {
  
				this.morphTargetDictionary = Object.assign( {}, source.morphTargetDictionary );
  
			}
  
			return this;
  
		},
  
		updateMorphTargets: function () {
  
			var geometry = this.geometry;
			var m, ml, name;
  
			if ( geometry.isBufferGeometry ) {
  
				var morphAttributes = geometry.morphAttributes;
				var keys = Object.keys( morphAttributes );
  
				if ( keys.length > 0 ) {
  
					var morphAttribute = morphAttributes[ keys[ 0 ] ];
  
					if ( morphAttribute !== undefined ) {
  
						this.morphTargetInfluences = [];
						this.morphTargetDictionary = {};
  
						for ( m = 0, ml = morphAttribute.length; m < ml; m ++ ) {
  
							name = morphAttribute[ m ].name || String( m );
  
							this.morphTargetInfluences.push( 0 );
							this.morphTargetDictionary[ name ] = m;
  
						}
  
					}
  
				}
  
			} else {
  
				var morphTargets = geometry.morphTargets;
  
				if ( morphTargets !== undefined && morphTargets.length > 0 ) {
  
					this.morphTargetInfluences = [];
					this.morphTargetDictionary = {};
  
					for ( m = 0, ml = morphTargets.length; m < ml; m ++ ) {
  
						name = morphTargets[ m ].name || String( m );
  
						this.morphTargetInfluences.push( 0 );
						this.morphTargetDictionary[ name ] = m;
  
					}
  
				}
  
			}
  
		},
  
		raycast: ( function () {
  
			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();
  
			var vA = new Vector3();
			var vB = new Vector3();
			var vC = new Vector3();
  
			var tempA = new Vector3();
			var tempB = new Vector3();
			var tempC = new Vector3();
  
			var uvA = new Vector2();
			var uvB = new Vector2();
			var uvC = new Vector2();
  
			var barycoord = new Vector3();
  
			var intersectionPoint = new Vector3();
			var intersectionPointWorld = new Vector3();
  
			function uvIntersection( point, p1, p2, p3, uv1, uv2, uv3 ) {
  
				Triangle.getBarycoord( point, p1, p2, p3, barycoord );
  
				uv1.multiplyScalar( barycoord.x );
				uv2.multiplyScalar( barycoord.y );
				uv3.multiplyScalar( barycoord.z );
  
				uv1.add( uv2 ).add( uv3 );
  
				return uv1.clone();
  
			}
  
			function checkIntersection( object, material, raycaster, ray, pA, pB, pC, point ) {
  
				var intersect;
  
				if ( material.side === BackSide ) {
  
					intersect = ray.intersectTriangle( pC, pB, pA, true, point );
  
				} else {
  
					intersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );
  
				}
  
				if ( intersect === null ) return null;
  
				intersectionPointWorld.copy( point );
				intersectionPointWorld.applyMatrix4( object.matrixWorld );
  
				var distance = raycaster.ray.origin.distanceTo( intersectionPointWorld );
  
				if ( distance < raycaster.near || distance > raycaster.far ) return null;
  
				return {
					distance: distance,
					point: intersectionPointWorld.clone(),
					object: object
				};
  
			}
  
			function checkBufferGeometryIntersection( object, raycaster, ray, position, uv, a, b, c ) {
  
				vA.fromBufferAttribute( position, a );
				vB.fromBufferAttribute( position, b );
				vC.fromBufferAttribute( position, c );
  
				var intersection = checkIntersection( object, object.material, raycaster, ray, vA, vB, vC, intersectionPoint );
  
				if ( intersection ) {
  
					if ( uv ) {
  
						uvA.fromBufferAttribute( uv, a );
						uvB.fromBufferAttribute( uv, b );
						uvC.fromBufferAttribute( uv, c );
  
						intersection.uv = uvIntersection( intersectionPoint, vA, vB, vC, uvA, uvB, uvC );
  
					}
  
					var face = new Face3( a, b, c );
					Triangle.getNormal( vA, vB, vC, face.normal );
  
					intersection.face = face;
  
				}
  
				return intersection;
  
			}
  
			return function raycast( raycaster, intersects ) {
  
				var geometry = this.geometry;
				var material = this.material;
				var matrixWorld = this.matrixWorld;
  
				if ( material === undefined ) return;
  
				// Checking boundingSphere distance to ray
  
				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();
  
				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );
  
				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;
  
				//
  
				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );
  
				// Check boundingBox before continuing
  
				if ( geometry.boundingBox !== null ) {
  
					if ( ray.intersectsBox( geometry.boundingBox ) === false ) return;
  
				}
  
				var intersection;
  
				if ( geometry.isBufferGeometry ) {
  
					var a, b, c;
					var index = geometry.index;
					var position = geometry.attributes.position;
					var uv = geometry.attributes.uv;
					var i, l;
  
					if ( index !== null ) {
  
						// indexed buffer geometry
  
						for ( i = 0, l = index.count; i < l; i += 3 ) {
  
							a = index.getX( i );
							b = index.getX( i + 1 );
							c = index.getX( i + 2 );
  
							intersection = checkBufferGeometryIntersection( this, raycaster, ray, position, uv, a, b, c );
  
							if ( intersection ) {
  
								intersection.faceIndex = Math.floor( i / 3 ); // triangle number in indexed buffer semantics
								intersects.push( intersection );
  
							}
  
						}
  
					} else if ( position !== undefined ) {
  
						// non-indexed buffer geometry
  
						for ( i = 0, l = position.count; i < l; i += 3 ) {
  
							a = i;
							b = i + 1;
							c = i + 2;
  
							intersection = checkBufferGeometryIntersection( this, raycaster, ray, position, uv, a, b, c );
  
							if ( intersection ) {
  
								intersection.faceIndex = Math.floor( i / 3 ); // triangle number in non-indexed buffer semantics
								intersects.push( intersection );
  
							}
  
						}
  
					}
  
				} else if ( geometry.isGeometry ) {
  
					var fvA, fvB, fvC;
					var isMultiMaterial = Array.isArray( material );
  
					var vertices = geometry.vertices;
					var faces = geometry.faces;
					var uvs;
  
					var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
					if ( faceVertexUvs.length > 0 ) uvs = faceVertexUvs;
  
					for ( var f = 0, fl = faces.length; f < fl; f ++ ) {
  
						var face = faces[ f ];
						var faceMaterial = isMultiMaterial ? material[ face.materialIndex ] : material;
  
						if ( faceMaterial === undefined ) continue;
  
						fvA = vertices[ face.a ];
						fvB = vertices[ face.b ];
						fvC = vertices[ face.c ];
  
						if ( faceMaterial.morphTargets === true ) {
  
							var morphTargets = geometry.morphTargets;
							var morphInfluences = this.morphTargetInfluences;
  
							vA.set( 0, 0, 0 );
							vB.set( 0, 0, 0 );
							vC.set( 0, 0, 0 );
  
							for ( var t = 0, tl = morphTargets.length; t < tl; t ++ ) {
  
								var influence = morphInfluences[ t ];
  
								if ( influence === 0 ) continue;
  
								var targets = morphTargets[ t ].vertices;
  
								vA.addScaledVector( tempA.subVectors( targets[ face.a ], fvA ), influence );
								vB.addScaledVector( tempB.subVectors( targets[ face.b ], fvB ), influence );
								vC.addScaledVector( tempC.subVectors( targets[ face.c ], fvC ), influence );
  
							}
  
							vA.add( fvA );
							vB.add( fvB );
							vC.add( fvC );
  
							fvA = vA;
							fvB = vB;
							fvC = vC;
  
						}
  
						intersection = checkIntersection( this, faceMaterial, raycaster, ray, fvA, fvB, fvC, intersectionPoint );
  
						if ( intersection ) {
  
							if ( uvs && uvs[ f ] ) {
  
								var uvs_f = uvs[ f ];
								uvA.copy( uvs_f[ 0 ] );
								uvB.copy( uvs_f[ 1 ] );
								uvC.copy( uvs_f[ 2 ] );
  
								intersection.uv = uvIntersection( intersectionPoint, fvA, fvB, fvC, uvA, uvB, uvC );
  
							}
  
							intersection.face = face;
							intersection.faceIndex = f;
							intersects.push( intersection );
  
						}
  
					}
  
				}
  
			};
  
		}() ),
  
		clone: function () {
  
			return new this.constructor( this.geometry, this.material ).copy( this );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLBackground( renderer, state, objects, premultipliedAlpha ) {
  
		var clearColor = new Color( 0x000000 );
		var clearAlpha = 0;
  
		var planeCamera, planeMesh;
		var boxMesh;
  
		function render( renderList, scene, camera, forceClear ) {
  
			var background = scene.background;
  
			if ( background === null ) {
  
				setClear( clearColor, clearAlpha );
  
			} else if ( background && background.isColor ) {
  
				setClear( background, 1 );
				forceClear = true;
  
			}
  
			if ( renderer.autoClear || forceClear ) {
  
				renderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );
  
			}
  
			if ( background && background.isCubeTexture ) {
  
				if ( boxMesh === undefined ) {
  
					boxMesh = new Mesh(
						new BoxBufferGeometry( 1, 1, 1 ),
						new ShaderMaterial( {
							uniforms: ShaderLib.cube.uniforms,
							vertexShader: ShaderLib.cube.vertexShader,
							fragmentShader: ShaderLib.cube.fragmentShader,
							side: BackSide,
							depthTest: true,
							depthWrite: false,
							fog: false
						} )
					);
  
					boxMesh.geometry.removeAttribute( 'normal' );
					boxMesh.geometry.removeAttribute( 'uv' );
  
					boxMesh.onBeforeRender = function ( renderer, scene, camera ) {
  
						this.matrixWorld.copyPosition( camera.matrixWorld );
  
					};
  
					objects.update( boxMesh );
  
				}
  
				boxMesh.material.uniforms.tCube.value = background;
  
				renderList.push( boxMesh, boxMesh.geometry, boxMesh.material, 0, null );
  
			} else if ( background && background.isTexture ) {
  
				if ( planeCamera === undefined ) {
  
					planeCamera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
  
					planeMesh = new Mesh(
						new PlaneBufferGeometry( 2, 2 ),
						new MeshBasicMaterial( { depthTest: false, depthWrite: false, fog: false } )
					);
  
					objects.update( planeMesh );
  
				}
  
				planeMesh.material.map = background;
  
				// TODO Push this to renderList
  
				renderer.renderBufferDirect( planeCamera, null, planeMesh.geometry, planeMesh.material, planeMesh, null );
  
			}
  
		}
  
		function setClear( color, alpha ) {
  
			state.buffers.color.setClear( color.r, color.g, color.b, alpha, premultipliedAlpha );
  
		}
  
		return {
  
			getClearColor: function () {
  
				return clearColor;
  
			},
			setClearColor: function ( color, alpha ) {
  
				clearColor.set( color );
				clearAlpha = alpha !== undefined ? alpha : 1;
				setClear( clearColor, clearAlpha );
  
			},
			getClearAlpha: function () {
  
				return clearAlpha;
  
			},
			setClearAlpha: function ( alpha ) {
  
				clearAlpha = alpha;
				setClear( clearColor, clearAlpha );
  
			},
			render: render
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLBufferRenderer( gl, extensions, info ) {
  
		var mode;
  
		function setMode( value ) {
  
			mode = value;
  
		}
  
		function render( start, count ) {
  
			gl.drawArrays( mode, start, count );
  
			info.update( count, mode );
  
		}
  
		function renderInstances( geometry, start, count ) {
  
			var extension = extensions.get( 'ANGLE_instanced_arrays' );
  
			if ( extension === null ) {
  
				console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
				return;
  
			}
  
			extension.drawArraysInstancedANGLE( mode, start, count, geometry.maxInstancedCount );
  
			info.update( count, mode, geometry.maxInstancedCount );
  
		}
  
		//
  
		this.setMode = setMode;
		this.render = render;
		this.renderInstances = renderInstances;
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLCapabilities( gl, extensions, parameters ) {
  
		var maxAnisotropy;
  
		function getMaxAnisotropy() {
  
			if ( maxAnisotropy !== undefined ) return maxAnisotropy;
  
			var extension = extensions.get( 'EXT_texture_filter_anisotropic' );
  
			if ( extension !== null ) {
  
				maxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );
  
			} else {
  
				maxAnisotropy = 0;
  
			}
  
			return maxAnisotropy;
  
		}
  
		function getMaxPrecision( precision ) {
  
			if ( precision === 'highp' ) {
  
				if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.HIGH_FLOAT ).precision > 0 &&
					 gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.HIGH_FLOAT ).precision > 0 ) {
  
					return 'highp';
  
				}
  
				precision = 'mediump';
  
			}
  
			if ( precision === 'mediump' ) {
  
				if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.MEDIUM_FLOAT ).precision > 0 &&
					 gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT ).precision > 0 ) {
  
					return 'mediump';
  
				}
  
			}
  
			return 'lowp';
  
		}
  
		var precision = parameters.precision !== undefined ? parameters.precision : 'highp';
		var maxPrecision = getMaxPrecision( precision );
  
		if ( maxPrecision !== precision ) {
  
			console.warn( 'THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.' );
			precision = maxPrecision;
  
		}
  
		var logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;
  
		var maxTextures = gl.getParameter( gl.MAX_TEXTURE_IMAGE_UNITS );
		var maxVertexTextures = gl.getParameter( gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS );
		var maxTextureSize = gl.getParameter( gl.MAX_TEXTURE_SIZE );
		var maxCubemapSize = gl.getParameter( gl.MAX_CUBE_MAP_TEXTURE_SIZE );
  
		var maxAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
		var maxVertexUniforms = gl.getParameter( gl.MAX_VERTEX_UNIFORM_VECTORS );
		var maxVaryings = gl.getParameter( gl.MAX_VARYING_VECTORS );
		var maxFragmentUniforms = gl.getParameter( gl.MAX_FRAGMENT_UNIFORM_VECTORS );
  
		var vertexTextures = maxVertexTextures > 0;
		var floatFragmentTextures = !! extensions.get( 'OES_texture_float' );
		var floatVertexTextures = vertexTextures && floatFragmentTextures;
  
		return {
  
			getMaxAnisotropy: getMaxAnisotropy,
			getMaxPrecision: getMaxPrecision,
  
			precision: precision,
			logarithmicDepthBuffer: logarithmicDepthBuffer,
  
			maxTextures: maxTextures,
			maxVertexTextures: maxVertexTextures,
			maxTextureSize: maxTextureSize,
			maxCubemapSize: maxCubemapSize,
  
			maxAttributes: maxAttributes,
			maxVertexUniforms: maxVertexUniforms,
			maxVaryings: maxVaryings,
			maxFragmentUniforms: maxFragmentUniforms,
  
			vertexTextures: vertexTextures,
			floatFragmentTextures: floatFragmentTextures,
			floatVertexTextures: floatVertexTextures
  
		};
  
	}
  
	/**
	 * @author tschw
	 */
  
	function WebGLClipping() {
  
		var scope = this,
  
			globalState = null,
			numGlobalPlanes = 0,
			localClippingEnabled = false,
			renderingShadows = false,
  
			plane = new Plane(),
			viewNormalMatrix = new Matrix3(),
  
			uniform = { value: null, needsUpdate: false };
  
		this.uniform = uniform;
		this.numPlanes = 0;
		this.numIntersection = 0;
  
		this.init = function ( planes, enableLocalClipping, camera ) {
  
			var enabled =
				planes.length !== 0 ||
				enableLocalClipping ||
				// enable state of previous frame - the clipping code has to
				// run another frame in order to reset the state:
				numGlobalPlanes !== 0 ||
				localClippingEnabled;
  
			localClippingEnabled = enableLocalClipping;
  
			globalState = projectPlanes( planes, camera, 0 );
			numGlobalPlanes = planes.length;
  
			return enabled;
  
		};
  
		this.beginShadows = function () {
  
			renderingShadows = true;
			projectPlanes( null );
  
		};
  
		this.endShadows = function () {
  
			renderingShadows = false;
			resetGlobalState();
  
		};
  
		this.setState = function ( planes, clipIntersection, clipShadows, camera, cache, fromCache ) {
  
			if ( ! localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && ! clipShadows ) {
  
				// there's no local clipping
  
				if ( renderingShadows ) {
  
					// there's no global clipping
  
					projectPlanes( null );
  
				} else {
  
					resetGlobalState();
  
				}
  
			} else {
  
				var nGlobal = renderingShadows ? 0 : numGlobalPlanes,
					lGlobal = nGlobal * 4,
  
					dstArray = cache.clippingState || null;
  
				uniform.value = dstArray; // ensure unique state
  
				dstArray = projectPlanes( planes, camera, lGlobal, fromCache );
  
				for ( var i = 0; i !== lGlobal; ++ i ) {
  
					dstArray[ i ] = globalState[ i ];
  
				}
  
				cache.clippingState = dstArray;
				this.numIntersection = clipIntersection ? this.numPlanes : 0;
				this.numPlanes += nGlobal;
  
			}
  
  
		};
  
		function resetGlobalState() {
  
			if ( uniform.value !== globalState ) {
  
				uniform.value = globalState;
				uniform.needsUpdate = numGlobalPlanes > 0;
  
			}
  
			scope.numPlanes = numGlobalPlanes;
			scope.numIntersection = 0;
  
		}
  
		function projectPlanes( planes, camera, dstOffset, skipTransform ) {
  
			var nPlanes = planes !== null ? planes.length : 0,
				dstArray = null;
  
			if ( nPlanes !== 0 ) {
  
				dstArray = uniform.value;
  
				if ( skipTransform !== true || dstArray === null ) {
  
					var flatSize = dstOffset + nPlanes * 4,
						viewMatrix = camera.matrixWorldInverse;
  
					viewNormalMatrix.getNormalMatrix( viewMatrix );
  
					if ( dstArray === null || dstArray.length < flatSize ) {
  
						dstArray = new Float32Array( flatSize );
  
					}
  
					for ( var i = 0, i4 = dstOffset; i !== nPlanes; ++ i, i4 += 4 ) {
  
						plane.copy( planes[ i ] ).applyMatrix4( viewMatrix, viewNormalMatrix );
  
						plane.normal.toArray( dstArray, i4 );
						dstArray[ i4 + 3 ] = plane.constant;
  
					}
  
				}
  
				uniform.value = dstArray;
				uniform.needsUpdate = true;
  
			}
  
			scope.numPlanes = nPlanes;
  
			return dstArray;
  
		}
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLExtensions( gl ) {
  
		var extensions = {};
  
		return {
  
			get: function ( name ) {
  
				if ( extensions[ name ] !== undefined ) {
  
					return extensions[ name ];
  
				}
  
				var extension;
  
				switch ( name ) {
  
					case 'WEBGL_depth_texture':
						extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
						break;
  
					case 'EXT_texture_filter_anisotropic':
						extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
						break;
  
					case 'WEBGL_compressed_texture_s3tc':
						extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
						break;
  
					case 'WEBGL_compressed_texture_pvrtc':
						extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
						break;
  
					default:
						extension = gl.getExtension( name );
  
				}
  
				if ( extension === null ) {
  
					console.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );
  
				}
  
				extensions[ name ] = extension;
  
				return extension;
  
			}
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLGeometries( gl, attributes, info ) {
  
		var geometries = {};
		var wireframeAttributes = {};
  
		function onGeometryDispose( event ) {
  
			var geometry = event.target;
			var buffergeometry = geometries[ geometry.id ];
  
			if ( buffergeometry.index !== null ) {
  
				attributes.remove( buffergeometry.index );
  
			}
  
			for ( var name in buffergeometry.attributes ) {
  
				attributes.remove( buffergeometry.attributes[ name ] );
  
			}
  
			geometry.removeEventListener( 'dispose', onGeometryDispose );
  
			delete geometries[ geometry.id ];
  
			// TODO Remove duplicate code
  
			var attribute = wireframeAttributes[ geometry.id ];
  
			if ( attribute ) {
  
				attributes.remove( attribute );
				delete wireframeAttributes[ geometry.id ];
  
			}
  
			attribute = wireframeAttributes[ buffergeometry.id ];
  
			if ( attribute ) {
  
				attributes.remove( attribute );
				delete wireframeAttributes[ buffergeometry.id ];
  
			}
  
			//
  
			info.memory.geometries --;
  
		}
  
		function get( object, geometry ) {
  
			var buffergeometry = geometries[ geometry.id ];
  
			if ( buffergeometry ) return buffergeometry;
  
			geometry.addEventListener( 'dispose', onGeometryDispose );
  
			if ( geometry.isBufferGeometry ) {
  
				buffergeometry = geometry;
  
			} else if ( geometry.isGeometry ) {
  
				if ( geometry._bufferGeometry === undefined ) {
  
					geometry._bufferGeometry = new BufferGeometry().setFromObject( object );
  
				}
  
				buffergeometry = geometry._bufferGeometry;
  
			}
  
			geometries[ geometry.id ] = buffergeometry;
  
			info.memory.geometries ++;
  
			return buffergeometry;
  
		}
  
		function update( geometry ) {
  
			var index = geometry.index;
			var geometryAttributes = geometry.attributes;
  
			if ( index !== null ) {
  
				attributes.update( index, gl.ELEMENT_ARRAY_BUFFER );
  
			}
  
			for ( var name in geometryAttributes ) {
  
				attributes.update( geometryAttributes[ name ], gl.ARRAY_BUFFER );
  
			}
  
			// morph targets
  
			var morphAttributes = geometry.morphAttributes;
  
			for ( var name in morphAttributes ) {
  
				var array = morphAttributes[ name ];
  
				for ( var i = 0, l = array.length; i < l; i ++ ) {
  
					attributes.update( array[ i ], gl.ARRAY_BUFFER );
  
				}
  
			}
  
		}
  
		function getWireframeAttribute( geometry ) {
  
			var attribute = wireframeAttributes[ geometry.id ];
  
			if ( attribute ) return attribute;
  
			var indices = [];
  
			var geometryIndex = geometry.index;
			var geometryAttributes = geometry.attributes;
  
			// console.time( 'wireframe' );
  
			if ( geometryIndex !== null ) {
  
				var array = geometryIndex.array;
  
				for ( var i = 0, l = array.length; i < l; i += 3 ) {
  
					var a = array[ i + 0 ];
					var b = array[ i + 1 ];
					var c = array[ i + 2 ];
  
					indices.push( a, b, b, c, c, a );
  
				}
  
			} else {
  
				var array = geometryAttributes.position.array;
  
				for ( var i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {
  
					var a = i + 0;
					var b = i + 1;
					var c = i + 2;
  
					indices.push( a, b, b, c, c, a );
  
				}
  
			}
  
			// console.timeEnd( 'wireframe' );
  
			attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );
  
			attributes.update( attribute, gl.ELEMENT_ARRAY_BUFFER );
  
			wireframeAttributes[ geometry.id ] = attribute;
  
			return attribute;
  
		}
  
		return {
  
			get: get,
			update: update,
  
			getWireframeAttribute: getWireframeAttribute
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLIndexedBufferRenderer( gl, extensions, info ) {
  
		var mode;
  
		function setMode( value ) {
  
			mode = value;
  
		}
  
		var type, bytesPerElement;
  
		function setIndex( value ) {
  
			type = value.type;
			bytesPerElement = value.bytesPerElement;
  
		}
  
		function render( start, count ) {
  
			gl.drawElements( mode, count, type, start * bytesPerElement );
  
			info.update( count, mode );
  
		}
  
		function renderInstances( geometry, start, count ) {
  
			var extension = extensions.get( 'ANGLE_instanced_arrays' );
  
			if ( extension === null ) {
  
				console.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
				return;
  
			}
  
			extension.drawElementsInstancedANGLE( mode, count, type, start * bytesPerElement, geometry.maxInstancedCount );
  
			info.update( count, mode, geometry.maxInstancedCount );
  
		}
  
		//
  
		this.setMode = setMode;
		this.setIndex = setIndex;
		this.render = render;
		this.renderInstances = renderInstances;
  
	}
  
	/**
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function WebGLInfo( gl ) {
  
		var memory = {
			geometries: 0,
			textures: 0
		};
  
		var render = {
			frame: 0,
			calls: 0,
			triangles: 0,
			points: 0,
			lines: 0
		};
  
		function update( count, mode, instanceCount ) {
  
			instanceCount = instanceCount || 1;
  
			render.calls ++;
  
			switch ( mode ) {
  
				case gl.TRIANGLES:
					render.triangles += instanceCount * ( count / 3 );
					break;
  
				case gl.TRIANGLE_STRIP:
				case gl.TRIANGLE_FAN:
					render.triangles += instanceCount * ( count - 2 );
					break;
  
				case gl.LINES:
					render.lines += instanceCount * ( count / 2 );
					break;
  
				case gl.LINE_STRIP:
					render.lines += instanceCount * ( count - 1 );
					break;
  
				case gl.LINE_LOOP:
					render.lines += instanceCount * count;
					break;
  
				case gl.POINTS:
					render.points += instanceCount * count;
					break;
  
				default:
					console.error( 'THREE.WebGLInfo: Unknown draw mode:', mode );
					break;
  
			}
  
		}
  
		function reset() {
  
			render.frame ++;
			render.calls = 0;
			render.triangles = 0;
			render.points = 0;
			render.lines = 0;
  
		}
  
		return {
			memory: memory,
			render: render,
			programs: null,
			autoReset: true,
			reset: reset,
			update: update
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function absNumericalSort( a, b ) {
  
		return Math.abs( b[ 1 ] ) - Math.abs( a[ 1 ] );
  
	}
  
	function WebGLMorphtargets( gl ) {
  
		var influencesList = {};
		var morphInfluences = new Float32Array( 8 );
  
		function update( object, geometry, material, program ) {
  
			var objectInfluences = object.morphTargetInfluences;
  
			var length = objectInfluences.length;
  
			var influences = influencesList[ geometry.id ];
  
			if ( influences === undefined ) {
  
				// initialise list
  
				influences = [];
  
				for ( var i = 0; i < length; i ++ ) {
  
					influences[ i ] = [ i, 0 ];
  
				}
  
				influencesList[ geometry.id ] = influences;
  
			}
  
			var morphTargets = material.morphTargets && geometry.morphAttributes.position;
			var morphNormals = material.morphNormals && geometry.morphAttributes.normal;
  
			// Remove current morphAttributes
  
			for ( var i = 0; i < length; i ++ ) {
  
				var influence = influences[ i ];
  
				if ( influence[ 1 ] !== 0 ) {
  
					if ( morphTargets ) geometry.removeAttribute( 'morphTarget' + i );
					if ( morphNormals ) geometry.removeAttribute( 'morphNormal' + i );
  
				}
  
			}
  
			// Collect influences
  
			for ( var i = 0; i < length; i ++ ) {
  
				var influence = influences[ i ];
  
				influence[ 0 ] = i;
				influence[ 1 ] = objectInfluences[ i ];
  
			}
  
			influences.sort( absNumericalSort );
  
			// Add morphAttributes
  
			for ( var i = 0; i < 8; i ++ ) {
  
				var influence = influences[ i ];
  
				if ( influence ) {
  
					var index = influence[ 0 ];
					var value = influence[ 1 ];
  
					if ( value ) {
  
						if ( morphTargets ) geometry.addAttribute( 'morphTarget' + i, morphTargets[ index ] );
						if ( morphNormals ) geometry.addAttribute( 'morphNormal' + i, morphNormals[ index ] );
  
						morphInfluences[ i ] = value;
						continue;
  
					}
  
				}
  
				morphInfluences[ i ] = 0;
  
			}
  
			program.getUniforms().setValue( gl, 'morphTargetInfluences', morphInfluences );
  
		}
  
		return {
  
			update: update
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLObjects( geometries, info ) {
  
		var updateList = {};
  
		function update( object ) {
  
			var frame = info.render.frame;
  
			var geometry = object.geometry;
			var buffergeometry = geometries.get( object, geometry );
  
			// Update once per frame
  
			if ( updateList[ buffergeometry.id ] !== frame ) {
  
				if ( geometry.isGeometry ) {
  
					buffergeometry.updateFromObject( object );
  
				}
  
				geometries.update( buffergeometry );
  
				updateList[ buffergeometry.id ] = frame;
  
			}
  
			return buffergeometry;
  
		}
  
		function dispose() {
  
			updateList = {};
  
		}
  
		return {
  
			update: update,
			dispose: dispose
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {
  
		images = images !== undefined ? images : [];
		mapping = mapping !== undefined ? mapping : CubeReflectionMapping;
  
		Texture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );
  
		this.flipY = false;
  
	}
  
	CubeTexture.prototype = Object.create( Texture.prototype );
	CubeTexture.prototype.constructor = CubeTexture;
  
	CubeTexture.prototype.isCubeTexture = true;
  
	Object.defineProperty( CubeTexture.prototype, 'images', {
  
		get: function () {
  
			return this.image;
  
		},
  
		set: function ( value ) {
  
			this.image = value;
  
		}
  
	} );
  
	/**
	 * @author tschw
	 *
	 * Uniforms of a program.
	 * Those form a tree structure with a special top-level container for the root,
	 * which you get by calling 'new WebGLUniforms( gl, program, renderer )'.
	 *
	 *
	 * Properties of inner nodes including the top-level container:
	 *
	 * .seq - array of nested uniforms
	 * .map - nested uniforms by name
	 *
	 *
	 * Methods of all nodes except the top-level container:
	 *
	 * .setValue( gl, value, [renderer] )
	 *
	 * 		uploads a uniform value(s)
	 *  	the 'renderer' parameter is needed for sampler uniforms
	 *
	 *
	 * Static methods of the top-level container (renderer factorizations):
	 *
	 * .upload( gl, seq, values, renderer )
	 *
	 * 		sets uniforms in 'seq' to 'values[id].value'
	 *
	 * .seqWithValue( seq, values ) : filteredSeq
	 *
	 * 		filters 'seq' entries with corresponding entry in values
	 *
	 *
	 * Methods of the top-level container (renderer factorizations):
	 *
	 * .setValue( gl, name, value )
	 *
	 * 		sets uniform with  name 'name' to 'value'
	 *
	 * .set( gl, obj, prop )
	 *
	 * 		sets uniform from object and property with same name than uniform
	 *
	 * .setOptional( gl, obj, prop )
	 *
	 * 		like .set for an optional property of the object
	 *
	 */
  
	var emptyTexture = new Texture();
	var emptyCubeTexture = new CubeTexture();
  
	// --- Base for inner nodes (including the root) ---
  
	function UniformContainer() {
  
		this.seq = [];
		this.map = {};
  
	}
  
	// --- Utilities ---
  
	// Array Caches (provide typed arrays for temporary by size)
  
	var arrayCacheF32 = [];
	var arrayCacheI32 = [];
  
	// Float32Array caches used for uploading Matrix uniforms
  
	var mat4array = new Float32Array( 16 );
	var mat3array = new Float32Array( 9 );
	var mat2array = new Float32Array( 4 );
  
	// Flattening for arrays of vectors and matrices
  
	function flatten( array, nBlocks, blockSize ) {
  
		var firstElem = array[ 0 ];
  
		if ( firstElem <= 0 || firstElem > 0 ) return array;
		// unoptimized: ! isNaN( firstElem )
		// see http://jacksondunstan.com/articles/983
  
		var n = nBlocks * blockSize,
			r = arrayCacheF32[ n ];
  
		if ( r === undefined ) {
  
			r = new Float32Array( n );
			arrayCacheF32[ n ] = r;
  
		}
  
		if ( nBlocks !== 0 ) {
  
			firstElem.toArray( r, 0 );
  
			for ( var i = 1, offset = 0; i !== nBlocks; ++ i ) {
  
				offset += blockSize;
				array[ i ].toArray( r, offset );
  
			}
  
		}
  
		return r;
  
	}
  
	function arraysEqual( a, b ) {
  
		if ( a.length !== b.length ) return false;
  
		for ( var i = 0, l = a.length; i < l; i ++ ) {
  
			if ( a[ i ] !== b[ i ] ) return false;
  
		}
  
		return true;
  
	}
  
	function copyArray( a, b ) {
  
		for ( var i = 0, l = b.length; i < l; i ++ ) {
  
			a[ i ] = b[ i ];
  
		}
  
	}
  
	// Texture unit allocation
  
	function allocTexUnits( renderer, n ) {
  
		var r = arrayCacheI32[ n ];
  
		if ( r === undefined ) {
  
			r = new Int32Array( n );
			arrayCacheI32[ n ] = r;
  
		}
  
		for ( var i = 0; i !== n; ++ i )
			r[ i ] = renderer.allocTextureUnit();
  
		return r;
  
	}
  
	// --- Setters ---
  
	// Note: Defining these methods externally, because they come in a bunch
	// and this way their names minify.
  
	// Single scalar
  
	function setValue1f( gl, v ) {
  
		var cache = this.cache;
  
		if ( cache[ 0 ] === v ) return;
  
		gl.uniform1f( this.addr, v );
  
		cache[ 0 ] = v;
  
	}
  
	function setValue1i( gl, v ) {
  
		var cache = this.cache;
  
		if ( cache[ 0 ] === v ) return;
  
		gl.uniform1i( this.addr, v );
  
		cache[ 0 ] = v;
  
	}
  
	// Single float vector (from flat array or THREE.VectorN)
  
	function setValue2fv( gl, v ) {
  
		var cache = this.cache;
  
		if ( v.x !== undefined ) {
  
			if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y ) {
  
				gl.uniform2f( this.addr, v.x, v.y );
  
				cache[ 0 ] = v.x;
				cache[ 1 ] = v.y;
  
			}
  
		} else {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniform2fv( this.addr, v );
  
			copyArray( cache, v );
  
		}
  
	}
  
	function setValue3fv( gl, v ) {
  
		var cache = this.cache;
  
		if ( v.x !== undefined ) {
  
			if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z ) {
  
				gl.uniform3f( this.addr, v.x, v.y, v.z );
  
				cache[ 0 ] = v.x;
				cache[ 1 ] = v.y;
				cache[ 2 ] = v.z;
  
			}
  
		} else if ( v.r !== undefined ) {
  
			if ( cache[ 0 ] !== v.r || cache[ 1 ] !== v.g || cache[ 2 ] !== v.b ) {
  
				gl.uniform3f( this.addr, v.r, v.g, v.b );
  
				cache[ 0 ] = v.r;
				cache[ 1 ] = v.g;
				cache[ 2 ] = v.b;
  
			}
  
		} else {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniform3fv( this.addr, v );
  
			copyArray( cache, v );
  
		}
  
	}
  
	function setValue4fv( gl, v ) {
  
		var cache = this.cache;
  
		if ( v.x !== undefined ) {
  
			if ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z || cache[ 3 ] !== v.w ) {
  
				gl.uniform4f( this.addr, v.x, v.y, v.z, v.w );
  
				cache[ 0 ] = v.x;
				cache[ 1 ] = v.y;
				cache[ 2 ] = v.z;
				cache[ 3 ] = v.w;
  
			}
  
		} else {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniform4fv( this.addr, v );
  
			copyArray( cache, v );
  
		}
  
	}
  
	// Single matrix (from flat array or MatrixN)
  
	function setValue2fm( gl, v ) {
  
		var cache = this.cache;
		var elements = v.elements;
  
		if ( elements === undefined ) {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniformMatrix2fv( this.addr, false, v );
  
			copyArray( cache, v );
  
		} else {
  
			if ( arraysEqual( cache, elements ) ) return;
  
			mat2array.set( elements );
  
			gl.uniformMatrix2fv( this.addr, false, mat2array );
  
			copyArray( cache, elements );
  
		}
  
	}
  
	function setValue3fm( gl, v ) {
  
		var cache = this.cache;
		var elements = v.elements;
  
		if ( elements === undefined ) {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniformMatrix3fv( this.addr, false, v );
  
			copyArray( cache, v );
  
		} else {
  
			if ( arraysEqual( cache, elements ) ) return;
  
			mat3array.set( elements );
  
			gl.uniformMatrix3fv( this.addr, false, mat3array );
  
			copyArray( cache, elements );
  
		}
  
	}
  
	function setValue4fm( gl, v ) {
  
		var cache = this.cache;
		var elements = v.elements;
  
		if ( elements === undefined ) {
  
			if ( arraysEqual( cache, v ) ) return;
  
			gl.uniformMatrix4fv( this.addr, false, v );
  
			copyArray( cache, v );
  
		} else {
  
			if ( arraysEqual( cache, elements ) ) return;
  
			mat4array.set( elements );
  
			gl.uniformMatrix4fv( this.addr, false, mat4array );
  
			copyArray( cache, elements );
  
		}
  
	}
  
	// Single texture (2D / Cube)
  
	function setValueT1( gl, v, renderer ) {
  
		var cache = this.cache;
		var unit = renderer.allocTextureUnit();
  
		if ( cache[ 0 ] !== unit ) {
  
			gl.uniform1i( this.addr, unit );
			cache[ 0 ] = unit;
  
		}
  
		renderer.setTexture2D( v || emptyTexture, unit );
  
	}
  
	function setValueT6( gl, v, renderer ) {
  
		var cache = this.cache;
		var unit = renderer.allocTextureUnit();
  
		if ( cache[ 0 ] !== unit ) {
  
			gl.uniform1i( this.addr, unit );
			cache[ 0 ] = unit;
  
		}
  
		renderer.setTextureCube( v || emptyCubeTexture, unit );
  
	}
  
	// Integer / Boolean vectors or arrays thereof (always flat arrays)
  
	function setValue2iv( gl, v ) {
  
		var cache = this.cache;
  
		if ( arraysEqual( cache, v ) ) return;
  
		gl.uniform2iv( this.addr, v );
  
		copyArray( cache, v );
  
	}
  
	function setValue3iv( gl, v ) {
  
		var cache = this.cache;
  
		if ( arraysEqual( cache, v ) ) return;
  
		gl.uniform3iv( this.addr, v );
  
		copyArray( cache, v );
  
	}
  
	function setValue4iv( gl, v ) {
  
		var cache = this.cache;
  
		if ( arraysEqual( cache, v ) ) return;
  
		gl.uniform4iv( this.addr, v );
  
		copyArray( cache, v );
  
	}
  
	// Helper to pick the right setter for the singular case
  
	function getSingularSetter( type ) {
  
		switch ( type ) {
  
			case 0x1406: return setValue1f; // FLOAT
			case 0x8b50: return setValue2fv; // _VEC2
			case 0x8b51: return setValue3fv; // _VEC3
			case 0x8b52: return setValue4fv; // _VEC4
  
			case 0x8b5a: return setValue2fm; // _MAT2
			case 0x8b5b: return setValue3fm; // _MAT3
			case 0x8b5c: return setValue4fm; // _MAT4
  
			case 0x8b5e: case 0x8d66: return setValueT1; // SAMPLER_2D, SAMPLER_EXTERNAL_OES
			case 0x8b60: return setValueT6; // SAMPLER_CUBE
  
			case 0x1404: case 0x8b56: return setValue1i; // INT, BOOL
			case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
			case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
			case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4
  
		}
  
	}
  
	// Array of scalars
  
	function setValue1fv( gl, v ) {
  
		var cache = this.cache;
  
		if ( arraysEqual( cache, v ) ) return;
  
		gl.uniform1fv( this.addr, v );
  
		copyArray( cache, v );
  
	}
	function setValue1iv( gl, v ) {
  
		var cache = this.cache;
  
		if ( arraysEqual( cache, v ) ) return;
  
		gl.uniform1iv( this.addr, v );
  
		copyArray( cache, v );
  
	}
  
	// Array of vectors (flat or from THREE classes)
  
	function setValueV2a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 2 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniform2fv( this.addr, data );
  
		this.updateCache( data );
  
	}
  
	function setValueV3a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 3 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniform3fv( this.addr, data );
  
		this.updateCache( data );
  
	}
  
	function setValueV4a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 4 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniform4fv( this.addr, data );
  
		this.updateCache( data );
  
	}
  
	// Array of matrices (flat or from THREE clases)
  
	function setValueM2a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 4 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniformMatrix2fv( this.addr, false, data );
  
		this.updateCache( data );
  
	}
  
	function setValueM3a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 9 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniformMatrix3fv( this.addr, false, data );
  
		this.updateCache( data );
  
	}
  
	function setValueM4a( gl, v ) {
  
		var cache = this.cache;
		var data = flatten( v, this.size, 16 );
  
		if ( arraysEqual( cache, data ) ) return;
  
		gl.uniformMatrix4fv( this.addr, false, data );
  
		this.updateCache( data );
  
	}
  
	// Array of textures (2D / Cube)
  
	function setValueT1a( gl, v, renderer ) {
  
		var cache = this.cache;
		var n = v.length;
  
		var units = allocTexUnits( renderer, n );
  
		if ( arraysEqual( cache, units ) === false ) {
  
			gl.uniform1iv( this.addr, units );
			copyArray( cache, units );
  
		}
  
		for ( var i = 0; i !== n; ++ i ) {
  
			renderer.setTexture2D( v[ i ] || emptyTexture, units[ i ] );
  
		}
  
	}
  
	function setValueT6a( gl, v, renderer ) {
  
		var cache = this.cache;
		var n = v.length;
  
		var units = allocTexUnits( renderer, n );
  
		if ( arraysEqual( cache, units ) === false ) {
  
			gl.uniform1iv( this.addr, units );
			copyArray( cache, units );
  
		}
  
		for ( var i = 0; i !== n; ++ i ) {
  
			renderer.setTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );
  
		}
  
	}
  
	// Helper to pick the right setter for a pure (bottom-level) array
  
	function getPureArraySetter( type ) {
  
		switch ( type ) {
  
			case 0x1406: return setValue1fv; // FLOAT
			case 0x8b50: return setValueV2a; // _VEC2
			case 0x8b51: return setValueV3a; // _VEC3
			case 0x8b52: return setValueV4a; // _VEC4
  
			case 0x8b5a: return setValueM2a; // _MAT2
			case 0x8b5b: return setValueM3a; // _MAT3
			case 0x8b5c: return setValueM4a; // _MAT4
  
			case 0x8b5e: return setValueT1a; // SAMPLER_2D
			case 0x8b60: return setValueT6a; // SAMPLER_CUBE
  
			case 0x1404: case 0x8b56: return setValue1iv; // INT, BOOL
			case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
			case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
			case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4
  
		}
  
	}
  
	// --- Uniform Classes ---
  
	function SingleUniform( id, activeInfo, addr ) {
  
		this.id = id;
		this.addr = addr;
		this.cache = [];
		this.setValue = getSingularSetter( activeInfo.type );
  
		// this.path = activeInfo.name; // DEBUG
  
	}
  
	function PureArrayUniform( id, activeInfo, addr ) {
  
		this.id = id;
		this.addr = addr;
		this.cache = [];
		this.size = activeInfo.size;
		this.setValue = getPureArraySetter( activeInfo.type );
  
		// this.path = activeInfo.name; // DEBUG
  
	}
  
	PureArrayUniform.prototype.updateCache = function ( data ) {
  
		var cache = this.cache;
  
		if ( data instanceof Float32Array && cache.length !== data.length ) {
  
			this.cache = new Float32Array( data.length );
  
		}
  
		copyArray( cache, data );
  
	};
  
	function StructuredUniform( id ) {
  
		this.id = id;
  
		UniformContainer.call( this ); // mix-in
  
	}
  
	StructuredUniform.prototype.setValue = function ( gl, value ) {
  
		// Note: Don't need an extra 'renderer' parameter, since samplers
		// are not allowed in structured uniforms.
  
		var seq = this.seq;
  
		for ( var i = 0, n = seq.length; i !== n; ++ i ) {
  
			var u = seq[ i ];
			u.setValue( gl, value[ u.id ] );
  
		}
  
	};
  
	// --- Top-level ---
  
	// Parser - builds up the property tree from the path strings
  
	var RePathPart = /([\w\d_]+)(\])?(\[|\.)?/g;
  
	// extracts
	// 	- the identifier (member name or array index)
	//  - followed by an optional right bracket (found when array index)
	//  - followed by an optional left bracket or dot (type of subscript)
	//
	// Note: These portions can be read in a non-overlapping fashion and
	// allow straightforward parsing of the hierarchy that WebGL encodes
	// in the uniform names.
  
	function addUniform( container, uniformObject ) {
  
		container.seq.push( uniformObject );
		container.map[ uniformObject.id ] = uniformObject;
  
	}
  
	function parseUniform( activeInfo, addr, container ) {
  
		var path = activeInfo.name,
			pathLength = path.length;
  
		// reset RegExp object, because of the early exit of a previous run
		RePathPart.lastIndex = 0;
  
		while ( true ) {
  
			var match = RePathPart.exec( path ),
				matchEnd = RePathPart.lastIndex,
  
				id = match[ 1 ],
				idIsIndex = match[ 2 ] === ']',
				subscript = match[ 3 ];
  
			if ( idIsIndex ) id = id | 0; // convert to integer
  
			if ( subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength ) {
  
				// bare name or "pure" bottom-level array "[0]" suffix
  
				addUniform( container, subscript === undefined ?
					new SingleUniform( id, activeInfo, addr ) :
					new PureArrayUniform( id, activeInfo, addr ) );
  
				break;
  
			} else {
  
				// step into inner node / create it in case it doesn't exist
  
				var map = container.map, next = map[ id ];
  
				if ( next === undefined ) {
  
					next = new StructuredUniform( id );
					addUniform( container, next );
  
				}
  
				container = next;
  
			}
  
		}
  
	}
  
	// Root Container
  
	function WebGLUniforms( gl, program, renderer ) {
  
		UniformContainer.call( this );
  
		this.renderer = renderer;
  
		var n = gl.getProgramParameter( program, gl.ACTIVE_UNIFORMS );
  
		for ( var i = 0; i < n; ++ i ) {
  
			var info = gl.getActiveUniform( program, i ),
				addr = gl.getUniformLocation( program, info.name );
  
			parseUniform( info, addr, this );
  
		}
  
	}
  
	WebGLUniforms.prototype.setValue = function ( gl, name, value ) {
  
		var u = this.map[ name ];
  
		if ( u !== undefined ) u.setValue( gl, value, this.renderer );
  
	};
  
	WebGLUniforms.prototype.setOptional = function ( gl, object, name ) {
  
		var v = object[ name ];
  
		if ( v !== undefined ) this.setValue( gl, name, v );
  
	};
  
  
	// Static interface
  
	WebGLUniforms.upload = function ( gl, seq, values, renderer ) {
  
		for ( var i = 0, n = seq.length; i !== n; ++ i ) {
  
			var u = seq[ i ],
				v = values[ u.id ];
  
			if ( v.needsUpdate !== false ) {
  
				// note: always updating when .needsUpdate is undefined
				u.setValue( gl, v.value, renderer );
  
			}
  
		}
  
	};
  
	WebGLUniforms.seqWithValue = function ( seq, values ) {
  
		var r = [];
  
		for ( var i = 0, n = seq.length; i !== n; ++ i ) {
  
			var u = seq[ i ];
			if ( u.id in values ) r.push( u );
  
		}
  
		return r;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function addLineNumbers( string ) {
  
		var lines = string.split( '\n' );
  
		for ( var i = 0; i < lines.length; i ++ ) {
  
			lines[ i ] = ( i + 1 ) + ': ' + lines[ i ];
  
		}
  
		return lines.join( '\n' );
  
	}
  
	function WebGLShader( gl, type, string ) {
  
		var shader = gl.createShader( type );
  
		gl.shaderSource( shader, string );
		gl.compileShader( shader );
  
		if ( gl.getShaderParameter( shader, gl.COMPILE_STATUS ) === false ) {
  
			console.error( 'THREE.WebGLShader: Shader couldn\'t compile.' );
  
		}
  
		if ( gl.getShaderInfoLog( shader ) !== '' ) {
  
			console.warn( 'THREE.WebGLShader: gl.getShaderInfoLog()', type === gl.VERTEX_SHADER ? 'vertex' : 'fragment', gl.getShaderInfoLog( shader ), addLineNumbers( string ) );
  
		}
  
		// --enable-privileged-webgl-extension
		// console.log( type, gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );
  
		return shader;
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var programIdCount = 0;
  
	function getEncodingComponents( encoding ) {
  
		switch ( encoding ) {
  
			case LinearEncoding:
				return [ 'Linear', '( value )' ];
			case sRGBEncoding:
				return [ 'sRGB', '( value )' ];
			case RGBEEncoding:
				return [ 'RGBE', '( value )' ];
			case RGBM7Encoding:
				return [ 'RGBM', '( value, 7.0 )' ];
			case RGBM16Encoding:
				return [ 'RGBM', '( value, 16.0 )' ];
			case RGBDEncoding:
				return [ 'RGBD', '( value, 256.0 )' ];
			case GammaEncoding:
				return [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];
			default:
				throw new Error( 'unsupported encoding: ' + encoding );
  
		}
  
	}
  
	function getTexelDecodingFunction( functionName, encoding ) {
  
		var components = getEncodingComponents( encoding );
		return 'vec4 ' + functionName + '( vec4 value ) { return ' + components[ 0 ] + 'ToLinear' + components[ 1 ] + '; }';
  
	}
  
	function getTexelEncodingFunction( functionName, encoding ) {
  
		var components = getEncodingComponents( encoding );
		return 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[ 0 ] + components[ 1 ] + '; }';
  
	}
  
	function getToneMappingFunction( functionName, toneMapping ) {
  
		var toneMappingName;
  
		switch ( toneMapping ) {
  
			case LinearToneMapping:
				toneMappingName = 'Linear';
				break;
  
			case ReinhardToneMapping:
				toneMappingName = 'Reinhard';
				break;
  
			case Uncharted2ToneMapping:
				toneMappingName = 'Uncharted2';
				break;
  
			case CineonToneMapping:
				toneMappingName = 'OptimizedCineon';
				break;
  
			default:
				throw new Error( 'unsupported toneMapping: ' + toneMapping );
  
		}
  
		return 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';
  
	}
  
	function generateExtensions( extensions, parameters, rendererExtensions ) {
  
		extensions = extensions || {};
  
		var chunks = [
			( extensions.derivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.normalMap || parameters.flatShading ) ? '#extension GL_OES_standard_derivatives : enable' : '',
			( extensions.fragDepth || parameters.logarithmicDepthBuffer ) && rendererExtensions.get( 'EXT_frag_depth' ) ? '#extension GL_EXT_frag_depth : enable' : '',
			( extensions.drawBuffers ) && rendererExtensions.get( 'WEBGL_draw_buffers' ) ? '#extension GL_EXT_draw_buffers : require' : '',
			( extensions.shaderTextureLOD || parameters.envMap ) && rendererExtensions.get( 'EXT_shader_texture_lod' ) ? '#extension GL_EXT_shader_texture_lod : enable' : ''
		];
  
		return chunks.filter( filterEmptyLine ).join( '\n' );
  
	}
  
	function generateDefines( defines ) {
  
		var chunks = [];
  
		for ( var name in defines ) {
  
			var value = defines[ name ];
  
			if ( value === false ) continue;
  
			chunks.push( '#define ' + name + ' ' + value );
  
		}
  
		return chunks.join( '\n' );
  
	}
  
	function fetchAttributeLocations( gl, program ) {
  
		var attributes = {};
  
		var n = gl.getProgramParameter( program, gl.ACTIVE_ATTRIBUTES );
  
		for ( var i = 0; i < n; i ++ ) {
  
			var info = gl.getActiveAttrib( program, i );
			var name = info.name;
  
			// console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );
  
			attributes[ name ] = gl.getAttribLocation( program, name );
  
		}
  
		return attributes;
  
	}
  
	function filterEmptyLine( string ) {
  
		return string !== '';
  
	}
  
	function replaceLightNums( string, parameters ) {
  
		return string
			.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )
			.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )
			.replace( /NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights )
			.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )
			.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights );
  
	}
  
	function replaceClippingPlaneNums( string, parameters ) {
  
		return string
			.replace( /NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes )
			.replace( /UNION_CLIPPING_PLANES/g, ( parameters.numClippingPlanes - parameters.numClipIntersection ) );
  
	}
  
	function parseIncludes( string ) {
  
		var pattern = /^[ \t]*#include +<([\w\d.]+)>/gm;
  
		function replace( match, include ) {
  
			var replace = ShaderChunk[ include ];
  
			if ( replace === undefined ) {
  
				throw new Error( 'Can not resolve #include <' + include + '>' );
  
			}
  
			return parseIncludes( replace );
  
		}
  
		return string.replace( pattern, replace );
  
	}
  
	function unrollLoops( string ) {
  
		var pattern = /#pragma unroll_loop[\s]+?for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;
  
		function replace( match, start, end, snippet ) {
  
			var unroll = '';
  
			for ( var i = parseInt( start ); i < parseInt( end ); i ++ ) {
  
				unroll += snippet.replace( /\[ i \]/g, '[ ' + i + ' ]' );
  
			}
  
			return unroll;
  
		}
  
		return string.replace( pattern, replace );
  
	}
  
	function WebGLProgram( renderer, extensions, code, material, shader, parameters ) {
  
		var gl = renderer.context;
  
		var defines = material.defines;
  
		var vertexShader = shader.vertexShader;
		var fragmentShader = shader.fragmentShader;
  
		var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';
  
		if ( parameters.shadowMapType === PCFShadowMap ) {
  
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';
  
		} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {
  
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';
  
		}
  
		var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
		var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';
		var envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
  
		if ( parameters.envMap ) {
  
			switch ( material.envMap.mapping ) {
  
				case CubeReflectionMapping:
				case CubeRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
					break;
  
				case CubeUVReflectionMapping:
				case CubeUVRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
					break;
  
				case EquirectangularReflectionMapping:
				case EquirectangularRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';
					break;
  
				case SphericalReflectionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_SPHERE';
					break;
  
			}
  
			switch ( material.envMap.mapping ) {
  
				case CubeRefractionMapping:
				case EquirectangularRefractionMapping:
					envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
					break;
  
			}
  
			switch ( material.combine ) {
  
				case MultiplyOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
					break;
  
				case MixOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
					break;
  
				case AddOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
					break;
  
			}
  
		}
  
		var gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;
  
		// console.log( 'building new program ' );
  
		//
  
		var customExtensions = generateExtensions( material.extensions, parameters, extensions );
  
		var customDefines = generateDefines( defines );
  
		//
  
		var program = gl.createProgram();
  
		var prefixVertex, prefixFragment;
  
		if ( material.isRawShaderMaterial ) {
  
			prefixVertex = [
  
				customDefines
  
			].filter( filterEmptyLine ).join( '\n' );
  
			if ( prefixVertex.length > 0 ) {
  
				prefixVertex += '\n';
  
			}
  
			prefixFragment = [
  
				customExtensions,
				customDefines
  
			].filter( filterEmptyLine ).join( '\n' );
  
			if ( prefixFragment.length > 0 ) {
  
				prefixFragment += '\n';
  
			}
  
		} else {
  
			prefixVertex = [
  
				'precision ' + parameters.precision + ' float;',
				'precision ' + parameters.precision + ' int;',
  
				'#define SHADER_NAME ' + shader.name,
  
				customDefines,
  
				parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',
  
				'#define GAMMA_FACTOR ' + gammaFactorDefine,
  
				'#define MAX_BONES ' + parameters.maxBones,
				( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
				( parameters.useFog && parameters.fogExp ) ? '#define FOG_EXP2' : '',
  
				parameters.map ? '#define USE_MAP' : '',
				parameters.envMap ? '#define USE_ENVMAP' : '',
				parameters.envMap ? '#define ' + envMapModeDefine : '',
				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
				parameters.aoMap ? '#define USE_AOMAP' : '',
				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
				parameters.normalMap ? '#define USE_NORMALMAP' : '',
				parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',
				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
				parameters.vertexColors ? '#define USE_COLOR' : '',
  
				parameters.flatShading ? '#define FLAT_SHADED' : '',
  
				parameters.skinning ? '#define USE_SKINNING' : '',
				parameters.useVertexTexture ? '#define BONE_TEXTURE' : '',
  
				parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',
				parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',
				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
				parameters.flipSided ? '#define FLIP_SIDED' : '',
  
				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',
  
				parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',
  
				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
				parameters.logarithmicDepthBuffer && extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',
  
				'uniform mat4 modelMatrix;',
				'uniform mat4 modelViewMatrix;',
				'uniform mat4 projectionMatrix;',
				'uniform mat4 viewMatrix;',
				'uniform mat3 normalMatrix;',
				'uniform vec3 cameraPosition;',
  
				'attribute vec3 position;',
				'attribute vec3 normal;',
				'attribute vec2 uv;',
  
				'#ifdef USE_COLOR',
  
				'	attribute vec3 color;',
  
				'#endif',
  
				'#ifdef USE_MORPHTARGETS',
  
				'	attribute vec3 morphTarget0;',
				'	attribute vec3 morphTarget1;',
				'	attribute vec3 morphTarget2;',
				'	attribute vec3 morphTarget3;',
  
				'	#ifdef USE_MORPHNORMALS',
  
				'		attribute vec3 morphNormal0;',
				'		attribute vec3 morphNormal1;',
				'		attribute vec3 morphNormal2;',
				'		attribute vec3 morphNormal3;',
  
				'	#else',
  
				'		attribute vec3 morphTarget4;',
				'		attribute vec3 morphTarget5;',
				'		attribute vec3 morphTarget6;',
				'		attribute vec3 morphTarget7;',
  
				'	#endif',
  
				'#endif',
  
				'#ifdef USE_SKINNING',
  
				'	attribute vec4 skinIndex;',
				'	attribute vec4 skinWeight;',
  
				'#endif',
  
				'\n'
  
			].filter( filterEmptyLine ).join( '\n' );
  
			prefixFragment = [
  
				customExtensions,
  
				'precision ' + parameters.precision + ' float;',
				'precision ' + parameters.precision + ' int;',
  
				'#define SHADER_NAME ' + shader.name,
  
				customDefines,
  
				parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest + ( parameters.alphaTest % 1 ? '' : '.0' ) : '', // add '.0' if integer
  
				'#define GAMMA_FACTOR ' + gammaFactorDefine,
  
				( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
				( parameters.useFog && parameters.fogExp ) ? '#define FOG_EXP2' : '',
  
				parameters.map ? '#define USE_MAP' : '',
				parameters.envMap ? '#define USE_ENVMAP' : '',
				parameters.envMap ? '#define ' + envMapTypeDefine : '',
				parameters.envMap ? '#define ' + envMapModeDefine : '',
				parameters.envMap ? '#define ' + envMapBlendingDefine : '',
				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
				parameters.aoMap ? '#define USE_AOMAP' : '',
				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
				parameters.normalMap ? '#define USE_NORMALMAP' : '',
				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
				parameters.vertexColors ? '#define USE_COLOR' : '',
  
				parameters.gradientMap ? '#define USE_GRADIENTMAP' : '',
  
				parameters.flatShading ? '#define FLAT_SHADED' : '',
  
				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
				parameters.flipSided ? '#define FLIP_SIDED' : '',
  
				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',
  
				parameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '',
  
				parameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '',
  
				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
				parameters.logarithmicDepthBuffer && extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',
  
				parameters.envMap && extensions.get( 'EXT_shader_texture_lod' ) ? '#define TEXTURE_LOD_EXT' : '',
  
				'uniform mat4 viewMatrix;',
				'uniform vec3 cameraPosition;',
  
				( parameters.toneMapping !== NoToneMapping ) ? '#define TONE_MAPPING' : '',
				( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below
				( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',
  
				parameters.dithering ? '#define DITHERING' : '',
  
				( parameters.outputEncoding || parameters.mapEncoding || parameters.envMapEncoding || parameters.emissiveMapEncoding ) ? ShaderChunk[ 'encodings_pars_fragment' ] : '', // this code is required here because it is used by the various encoding/decoding function defined below
				parameters.mapEncoding ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',
				parameters.envMapEncoding ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',
				parameters.emissiveMapEncoding ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',
				parameters.outputEncoding ? getTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ) : '',
  
				parameters.depthPacking ? '#define DEPTH_PACKING ' + material.depthPacking : '',
  
				'\n'
  
			].filter( filterEmptyLine ).join( '\n' );
  
		}
  
		vertexShader = parseIncludes( vertexShader );
		vertexShader = replaceLightNums( vertexShader, parameters );
		vertexShader = replaceClippingPlaneNums( vertexShader, parameters );
  
		fragmentShader = parseIncludes( fragmentShader );
		fragmentShader = replaceLightNums( fragmentShader, parameters );
		fragmentShader = replaceClippingPlaneNums( fragmentShader, parameters );
  
		vertexShader = unrollLoops( vertexShader );
		fragmentShader = unrollLoops( fragmentShader );
  
		var vertexGlsl = prefixVertex + vertexShader;
		var fragmentGlsl = prefixFragment + fragmentShader;
  
		// console.log( '*VERTEX*', vertexGlsl );
		// console.log( '*FRAGMENT*', fragmentGlsl );
  
		var glVertexShader = WebGLShader( gl, gl.VERTEX_SHADER, vertexGlsl );
		var glFragmentShader = WebGLShader( gl, gl.FRAGMENT_SHADER, fragmentGlsl );
  
		gl.attachShader( program, glVertexShader );
		gl.attachShader( program, glFragmentShader );
  
		// Force a particular attribute to index 0.
  
		if ( material.index0AttributeName !== undefined ) {
  
			gl.bindAttribLocation( program, 0, material.index0AttributeName );
  
		} else if ( parameters.morphTargets === true ) {
  
			// programs with morphTargets displace position out of attribute 0
			gl.bindAttribLocation( program, 0, 'position' );
  
		}
  
		gl.linkProgram( program );
  
		var programLog = gl.getProgramInfoLog( program ).trim();
		var vertexLog = gl.getShaderInfoLog( glVertexShader ).trim();
		var fragmentLog = gl.getShaderInfoLog( glFragmentShader ).trim();
  
		var runnable = true;
		var haveDiagnostics = true;
  
		// console.log( '**VERTEX**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glVertexShader ) );
		// console.log( '**FRAGMENT**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glFragmentShader ) );
  
		if ( gl.getProgramParameter( program, gl.LINK_STATUS ) === false ) {
  
			runnable = false;
  
			console.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), 'gl.VALIDATE_STATUS', gl.getProgramParameter( program, gl.VALIDATE_STATUS ), 'gl.getProgramInfoLog', programLog, vertexLog, fragmentLog );
  
		} else if ( programLog !== '' ) {
  
			console.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );
  
		} else if ( vertexLog === '' || fragmentLog === '' ) {
  
			haveDiagnostics = false;
  
		}
  
		if ( haveDiagnostics ) {
  
			this.diagnostics = {
  
				runnable: runnable,
				material: material,
  
				programLog: programLog,
  
				vertexShader: {
  
					log: vertexLog,
					prefix: prefixVertex
  
				},
  
				fragmentShader: {
  
					log: fragmentLog,
					prefix: prefixFragment
  
				}
  
			};
  
		}
  
		// clean up
  
		gl.deleteShader( glVertexShader );
		gl.deleteShader( glFragmentShader );
  
		// set up caching for uniform locations
  
		var cachedUniforms;
  
		this.getUniforms = function () {
  
			if ( cachedUniforms === undefined ) {
  
				cachedUniforms = new WebGLUniforms( gl, program, renderer );
  
			}
  
			return cachedUniforms;
  
		};
  
		// set up caching for attribute locations
  
		var cachedAttributes;
  
		this.getAttributes = function () {
  
			if ( cachedAttributes === undefined ) {
  
				cachedAttributes = fetchAttributeLocations( gl, program );
  
			}
  
			return cachedAttributes;
  
		};
  
		// free resource
  
		this.destroy = function () {
  
			gl.deleteProgram( program );
			this.program = undefined;
  
		};
  
		// DEPRECATED
  
		Object.defineProperties( this, {
  
			uniforms: {
				get: function () {
  
					console.warn( 'THREE.WebGLProgram: .uniforms is now .getUniforms().' );
					return this.getUniforms();
  
				}
			},
  
			attributes: {
				get: function () {
  
					console.warn( 'THREE.WebGLProgram: .attributes is now .getAttributes().' );
					return this.getAttributes();
  
				}
			}
  
		} );
  
  
		//
  
		this.name = shader.name;
		this.id = programIdCount ++;
		this.code = code;
		this.usedTimes = 1;
		this.program = program;
		this.vertexShader = glVertexShader;
		this.fragmentShader = glFragmentShader;
  
		return this;
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLPrograms( renderer, extensions, capabilities ) {
  
		var programs = [];
  
		var shaderIDs = {
			MeshDepthMaterial: 'depth',
			MeshDistanceMaterial: 'distanceRGBA',
			MeshNormalMaterial: 'normal',
			MeshBasicMaterial: 'basic',
			MeshLambertMaterial: 'lambert',
			MeshPhongMaterial: 'phong',
			MeshToonMaterial: 'phong',
			MeshStandardMaterial: 'physical',
			MeshPhysicalMaterial: 'physical',
			LineBasicMaterial: 'basic',
			LineDashedMaterial: 'dashed',
			PointsMaterial: 'points',
			ShadowMaterial: 'shadow'
		};
  
		var parameterNames = [
			"precision", "supportsVertexTextures", "map", "mapEncoding", "envMap", "envMapMode", "envMapEncoding",
			"lightMap", "aoMap", "emissiveMap", "emissiveMapEncoding", "bumpMap", "normalMap", "displacementMap", "specularMap",
			"roughnessMap", "metalnessMap", "gradientMap",
			"alphaMap", "combine", "vertexColors", "fog", "useFog", "fogExp",
			"flatShading", "sizeAttenuation", "logarithmicDepthBuffer", "skinning",
			"maxBones", "useVertexTexture", "morphTargets", "morphNormals",
			"maxMorphTargets", "maxMorphNormals", "premultipliedAlpha",
			"numDirLights", "numPointLights", "numSpotLights", "numHemiLights", "numRectAreaLights",
			"shadowMapEnabled", "shadowMapType", "toneMapping", 'physicallyCorrectLights',
			"alphaTest", "doubleSided", "flipSided", "numClippingPlanes", "numClipIntersection", "depthPacking", "dithering"
		];
  
  
		function allocateBones( object ) {
  
			var skeleton = object.skeleton;
			var bones = skeleton.bones;
  
			if ( capabilities.floatVertexTextures ) {
  
				return 1024;
  
			} else {
  
				// default for when object is not specified
				// ( for example when prebuilding shader to be used with multiple objects )
				//
				//  - leave some extra space for other uniforms
				//  - limit here is ANGLE's 254 max uniform vectors
				//    (up to 54 should be safe)
  
				var nVertexUniforms = capabilities.maxVertexUniforms;
				var nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );
  
				var maxBones = Math.min( nVertexMatrices, bones.length );
  
				if ( maxBones < bones.length ) {
  
					console.warn( 'THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.' );
					return 0;
  
				}
  
				return maxBones;
  
			}
  
		}
  
		function getTextureEncodingFromMap( map, gammaOverrideLinear ) {
  
			var encoding;
  
			if ( ! map ) {
  
				encoding = LinearEncoding;
  
			} else if ( map.isTexture ) {
  
				encoding = map.encoding;
  
			} else if ( map.isWebGLRenderTarget ) {
  
				console.warn( "THREE.WebGLPrograms.getTextureEncodingFromMap: don't use render targets as textures. Use their .texture property instead." );
				encoding = map.texture.encoding;
  
			}
  
			// add backwards compatibility for WebGLRenderer.gammaInput/gammaOutput parameter, should probably be removed at some point.
			if ( encoding === LinearEncoding && gammaOverrideLinear ) {
  
				encoding = GammaEncoding;
  
			}
  
			return encoding;
  
		}
  
		this.getParameters = function ( material, lights, shadows, fog, nClipPlanes, nClipIntersection, object ) {
  
			var shaderID = shaderIDs[ material.type ];
  
			// heuristics to create shader parameters according to lights in the scene
			// (not to blow over maxLights budget)
  
			var maxBones = object.isSkinnedMesh ? allocateBones( object ) : 0;
			var precision = capabilities.precision;
  
			if ( material.precision !== null ) {
  
				precision = capabilities.getMaxPrecision( material.precision );
  
				if ( precision !== material.precision ) {
  
					console.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );
  
				}
  
			}
  
			var currentRenderTarget = renderer.getRenderTarget();
  
			var parameters = {
  
				shaderID: shaderID,
  
				precision: precision,
				supportsVertexTextures: capabilities.vertexTextures,
				outputEncoding: getTextureEncodingFromMap( ( ! currentRenderTarget ) ? null : currentRenderTarget.texture, renderer.gammaOutput ),
				map: !! material.map,
				mapEncoding: getTextureEncodingFromMap( material.map, renderer.gammaInput ),
				envMap: !! material.envMap,
				envMapMode: material.envMap && material.envMap.mapping,
				envMapEncoding: getTextureEncodingFromMap( material.envMap, renderer.gammaInput ),
				envMapCubeUV: ( !! material.envMap ) && ( ( material.envMap.mapping === CubeUVReflectionMapping ) || ( material.envMap.mapping === CubeUVRefractionMapping ) ),
				lightMap: !! material.lightMap,
				aoMap: !! material.aoMap,
				emissiveMap: !! material.emissiveMap,
				emissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap, renderer.gammaInput ),
				bumpMap: !! material.bumpMap,
				normalMap: !! material.normalMap,
				displacementMap: !! material.displacementMap,
				roughnessMap: !! material.roughnessMap,
				metalnessMap: !! material.metalnessMap,
				specularMap: !! material.specularMap,
				alphaMap: !! material.alphaMap,
  
				gradientMap: !! material.gradientMap,
  
				combine: material.combine,
  
				vertexColors: material.vertexColors,
  
				fog: !! fog,
				useFog: material.fog,
				fogExp: ( fog && fog.isFogExp2 ),
  
				flatShading: material.flatShading,
  
				sizeAttenuation: material.sizeAttenuation,
				logarithmicDepthBuffer: capabilities.logarithmicDepthBuffer,
  
				skinning: material.skinning && maxBones > 0,
				maxBones: maxBones,
				useVertexTexture: capabilities.floatVertexTextures,
  
				morphTargets: material.morphTargets,
				morphNormals: material.morphNormals,
				maxMorphTargets: renderer.maxMorphTargets,
				maxMorphNormals: renderer.maxMorphNormals,
  
				numDirLights: lights.directional.length,
				numPointLights: lights.point.length,
				numSpotLights: lights.spot.length,
				numRectAreaLights: lights.rectArea.length,
				numHemiLights: lights.hemi.length,
  
				numClippingPlanes: nClipPlanes,
				numClipIntersection: nClipIntersection,
  
				dithering: material.dithering,
  
				shadowMapEnabled: renderer.shadowMap.enabled && object.receiveShadow && shadows.length > 0,
				shadowMapType: renderer.shadowMap.type,
  
				toneMapping: renderer.toneMapping,
				physicallyCorrectLights: renderer.physicallyCorrectLights,
  
				premultipliedAlpha: material.premultipliedAlpha,
  
				alphaTest: material.alphaTest,
				doubleSided: material.side === DoubleSide,
				flipSided: material.side === BackSide,
  
				depthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false
  
			};
  
			return parameters;
  
		};
  
		this.getProgramCode = function ( material, parameters ) {
  
			var array = [];
  
			if ( parameters.shaderID ) {
  
				array.push( parameters.shaderID );
  
			} else {
  
				array.push( material.fragmentShader );
				array.push( material.vertexShader );
  
			}
  
			if ( material.defines !== undefined ) {
  
				for ( var name in material.defines ) {
  
					array.push( name );
					array.push( material.defines[ name ] );
  
				}
  
			}
  
			for ( var i = 0; i < parameterNames.length; i ++ ) {
  
				array.push( parameters[ parameterNames[ i ] ] );
  
			}
  
			array.push( material.onBeforeCompile.toString() );
  
			array.push( renderer.gammaOutput );
  
			return array.join();
  
		};
  
		this.acquireProgram = function ( material, shader, parameters, code ) {
  
			var program;
  
			// Check if code has been already compiled
			for ( var p = 0, pl = programs.length; p < pl; p ++ ) {
  
				var programInfo = programs[ p ];
  
				if ( programInfo.code === code ) {
  
					program = programInfo;
					++ program.usedTimes;
  
					break;
  
				}
  
			}
  
			if ( program === undefined ) {
  
				program = new WebGLProgram( renderer, extensions, code, material, shader, parameters );
				programs.push( program );
  
			}
  
			return program;
  
		};
  
		this.releaseProgram = function ( program ) {
  
			if ( -- program.usedTimes === 0 ) {
  
				// Remove from unordered set
				var i = programs.indexOf( program );
				programs[ i ] = programs[ programs.length - 1 ];
				programs.pop();
  
				// Free WebGL resources
				program.destroy();
  
			}
  
		};
  
		// Exposed for resource monitoring & error feedback via renderer.info:
		this.programs = programs;
  
	}
  
	/**
	 * @author fordacious / fordacious.github.io
	 */
  
	function WebGLProperties() {
  
		var properties = new WeakMap();
  
		function get( object ) {
  
			var map = properties.get( object );
  
			if ( map === undefined ) {
  
				map = {};
				properties.set( object, map );
  
			}
  
			return map;
  
		}
  
		function remove( object ) {
  
			properties.delete( object );
  
		}
  
		function update( object, key, value ) {
  
			properties.get( object )[ key ] = value;
  
		}
  
		function dispose() {
  
			properties = new WeakMap();
  
		}
  
		return {
			get: get,
			remove: remove,
			update: update,
			dispose: dispose
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function painterSortStable( a, b ) {
  
		if ( a.renderOrder !== b.renderOrder ) {
  
			return a.renderOrder - b.renderOrder;
  
		} else if ( a.program && b.program && a.program !== b.program ) {
  
			return a.program.id - b.program.id;
  
		} else if ( a.material.id !== b.material.id ) {
  
			return a.material.id - b.material.id;
  
		} else if ( a.z !== b.z ) {
  
			return a.z - b.z;
  
		} else {
  
			return a.id - b.id;
  
		}
  
	}
  
	function reversePainterSortStable( a, b ) {
  
		if ( a.renderOrder !== b.renderOrder ) {
  
			return a.renderOrder - b.renderOrder;
  
		} if ( a.z !== b.z ) {
  
			return b.z - a.z;
  
		} else {
  
			return a.id - b.id;
  
		}
  
	}
  
	function WebGLRenderList() {
  
		var renderItems = [];
		var renderItemsIndex = 0;
  
		var opaque = [];
		var transparent = [];
  
		function init() {
  
			renderItemsIndex = 0;
  
			opaque.length = 0;
			transparent.length = 0;
  
		}
  
		function push( object, geometry, material, z, group ) {
  
			var renderItem = renderItems[ renderItemsIndex ];
  
			if ( renderItem === undefined ) {
  
				renderItem = {
					id: object.id,
					object: object,
					geometry: geometry,
					material: material,
					program: material.program,
					renderOrder: object.renderOrder,
					z: z,
					group: group
				};
  
				renderItems[ renderItemsIndex ] = renderItem;
  
			} else {
  
				renderItem.id = object.id;
				renderItem.object = object;
				renderItem.geometry = geometry;
				renderItem.material = material;
				renderItem.program = material.program;
				renderItem.renderOrder = object.renderOrder;
				renderItem.z = z;
				renderItem.group = group;
  
			}
  
			( material.transparent === true ? transparent : opaque ).push( renderItem );
  
			renderItemsIndex ++;
  
		}
  
		function sort() {
  
			if ( opaque.length > 1 ) opaque.sort( painterSortStable );
			if ( transparent.length > 1 ) transparent.sort( reversePainterSortStable );
  
		}
  
		return {
			opaque: opaque,
			transparent: transparent,
  
			init: init,
			push: push,
  
			sort: sort
		};
  
	}
  
	function WebGLRenderLists() {
  
		var lists = {};
  
		function get( scene, camera ) {
  
			var hash = scene.id + ',' + camera.id;
			var list = lists[ hash ];
  
			if ( list === undefined ) {
  
				// console.log( 'THREE.WebGLRenderLists:', hash );
  
				list = new WebGLRenderList();
				lists[ hash ] = list;
  
			}
  
			return list;
  
		}
  
		function dispose() {
  
			lists = {};
  
		}
  
		return {
			get: get,
			dispose: dispose
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function UniformsCache() {
  
		var lights = {};
  
		return {
  
			get: function ( light ) {
  
				if ( lights[ light.id ] !== undefined ) {
  
					return lights[ light.id ];
  
				}
  
				var uniforms;
  
				switch ( light.type ) {
  
					case 'DirectionalLight':
						uniforms = {
							direction: new Vector3(),
							color: new Color(),
  
							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;
  
					case 'SpotLight':
						uniforms = {
							position: new Vector3(),
							direction: new Vector3(),
							color: new Color(),
							distance: 0,
							coneCos: 0,
							penumbraCos: 0,
							decay: 0,
  
							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;
  
					case 'PointLight':
						uniforms = {
							position: new Vector3(),
							color: new Color(),
							distance: 0,
							decay: 0,
  
							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2(),
							shadowCameraNear: 1,
							shadowCameraFar: 1000
						};
						break;
  
					case 'HemisphereLight':
						uniforms = {
							direction: new Vector3(),
							skyColor: new Color(),
							groundColor: new Color()
						};
						break;
  
					case 'RectAreaLight':
						uniforms = {
							color: new Color(),
							position: new Vector3(),
							halfWidth: new Vector3(),
							halfHeight: new Vector3()
							// TODO (abelnation): set RectAreaLight shadow uniforms
						};
						break;
  
				}
  
				lights[ light.id ] = uniforms;
  
				return uniforms;
  
			}
  
		};
  
	}
  
	var count = 0;
  
	function WebGLLights() {
  
		var cache = new UniformsCache();
  
		var state = {
  
			id: count ++,
  
			hash: '',
  
			ambient: [ 0, 0, 0 ],
			directional: [],
			directionalShadowMap: [],
			directionalShadowMatrix: [],
			spot: [],
			spotShadowMap: [],
			spotShadowMatrix: [],
			rectArea: [],
			point: [],
			pointShadowMap: [],
			pointShadowMatrix: [],
			hemi: []
  
		};
  
		var vector3 = new Vector3();
		var matrix4 = new Matrix4();
		var matrix42 = new Matrix4();
  
		function setup( lights, shadows, camera ) {
  
			var r = 0, g = 0, b = 0;
  
			var directionalLength = 0;
			var pointLength = 0;
			var spotLength = 0;
			var rectAreaLength = 0;
			var hemiLength = 0;
  
			var viewMatrix = camera.matrixWorldInverse;
  
			for ( var i = 0, l = lights.length; i < l; i ++ ) {
  
				var light = lights[ i ];
  
				var color = light.color;
				var intensity = light.intensity;
				var distance = light.distance;
  
				var shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;
  
				if ( light.isAmbientLight ) {
  
					r += color.r * intensity;
					g += color.g * intensity;
					b += color.b * intensity;
  
				} else if ( light.isDirectionalLight ) {
  
					var uniforms = cache.get( light );
  
					uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					vector3.setFromMatrixPosition( light.target.matrixWorld );
					uniforms.direction.sub( vector3 );
					uniforms.direction.transformDirection( viewMatrix );
  
					uniforms.shadow = light.castShadow;
  
					if ( light.castShadow ) {
  
						var shadow = light.shadow;
  
						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;
  
					}
  
					state.directionalShadowMap[ directionalLength ] = shadowMap;
					state.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;
					state.directional[ directionalLength ] = uniforms;
  
					directionalLength ++;
  
				} else if ( light.isSpotLight ) {
  
					var uniforms = cache.get( light );
  
					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );
  
					uniforms.color.copy( color ).multiplyScalar( intensity );
					uniforms.distance = distance;
  
					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					vector3.setFromMatrixPosition( light.target.matrixWorld );
					uniforms.direction.sub( vector3 );
					uniforms.direction.transformDirection( viewMatrix );
  
					uniforms.coneCos = Math.cos( light.angle );
					uniforms.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );
					uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;
  
					uniforms.shadow = light.castShadow;
  
					if ( light.castShadow ) {
  
						var shadow = light.shadow;
  
						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;
  
					}
  
					state.spotShadowMap[ spotLength ] = shadowMap;
					state.spotShadowMatrix[ spotLength ] = light.shadow.matrix;
					state.spot[ spotLength ] = uniforms;
  
					spotLength ++;
  
				} else if ( light.isRectAreaLight ) {
  
					var uniforms = cache.get( light );
  
					// (a) intensity is the total visible light emitted
					//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );
  
					// (b) intensity is the brightness of the light
					uniforms.color.copy( color ).multiplyScalar( intensity );
  
					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );
  
					// extract local rotation of light to derive width/height half vectors
					matrix42.identity();
					matrix4.copy( light.matrixWorld );
					matrix4.premultiply( viewMatrix );
					matrix42.extractRotation( matrix4 );
  
					uniforms.halfWidth.set( light.width * 0.5, 0.0, 0.0 );
					uniforms.halfHeight.set( 0.0, light.height * 0.5, 0.0 );
  
					uniforms.halfWidth.applyMatrix4( matrix42 );
					uniforms.halfHeight.applyMatrix4( matrix42 );
  
					// TODO (abelnation): RectAreaLight distance?
					// uniforms.distance = distance;
  
					state.rectArea[ rectAreaLength ] = uniforms;
  
					rectAreaLength ++;
  
				} else if ( light.isPointLight ) {
  
					var uniforms = cache.get( light );
  
					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );
  
					uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
					uniforms.distance = light.distance;
					uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;
  
					uniforms.shadow = light.castShadow;
  
					if ( light.castShadow ) {
  
						var shadow = light.shadow;
  
						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;
						uniforms.shadowCameraNear = shadow.camera.near;
						uniforms.shadowCameraFar = shadow.camera.far;
  
					}
  
					state.pointShadowMap[ pointLength ] = shadowMap;
					state.pointShadowMatrix[ pointLength ] = light.shadow.matrix;
					state.point[ pointLength ] = uniforms;
  
					pointLength ++;
  
				} else if ( light.isHemisphereLight ) {
  
					var uniforms = cache.get( light );
  
					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					uniforms.direction.transformDirection( viewMatrix );
					uniforms.direction.normalize();
  
					uniforms.skyColor.copy( light.color ).multiplyScalar( intensity );
					uniforms.groundColor.copy( light.groundColor ).multiplyScalar( intensity );
  
					state.hemi[ hemiLength ] = uniforms;
  
					hemiLength ++;
  
				}
  
			}
  
			state.ambient[ 0 ] = r;
			state.ambient[ 1 ] = g;
			state.ambient[ 2 ] = b;
  
			state.directional.length = directionalLength;
			state.spot.length = spotLength;
			state.rectArea.length = rectAreaLength;
			state.point.length = pointLength;
			state.hemi.length = hemiLength;
  
			state.hash = state.id + ',' + directionalLength + ',' + pointLength + ',' + spotLength + ',' + rectAreaLength + ',' + hemiLength + ',' + shadows.length;
  
		}
  
		return {
			setup: setup,
			state: state
		};
  
	}
  
	/**
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function WebGLRenderState() {
  
		var lights = new WebGLLights();
  
		var lightsArray = [];
		var shadowsArray = [];
		var spritesArray = [];
  
		function init() {
  
			lightsArray.length = 0;
			shadowsArray.length = 0;
			spritesArray.length = 0;
  
		}
  
		function pushLight( light ) {
  
			lightsArray.push( light );
  
		}
  
		function pushShadow( shadowLight ) {
  
			shadowsArray.push( shadowLight );
  
		}
  
		function pushSprite( shadowLight ) {
  
			spritesArray.push( shadowLight );
  
		}
  
		function setupLights( camera ) {
  
			lights.setup( lightsArray, shadowsArray, camera );
  
		}
  
		var state = {
			lightsArray: lightsArray,
			shadowsArray: shadowsArray,
			spritesArray: spritesArray,
  
			lights: lights
		};
  
		return {
			init: init,
			state: state,
			setupLights: setupLights,
  
			pushLight: pushLight,
			pushShadow: pushShadow,
			pushSprite: pushSprite
		};
  
	}
  
	function WebGLRenderStates() {
  
		var renderStates = {};
  
		function get( scene, camera ) {
  
			var hash = scene.id + ',' + camera.id;
  
			var renderState = renderStates[ hash ];
  
			if ( renderState === undefined ) {
  
				renderState = new WebGLRenderState();
				renderStates[ hash ] = renderState;
  
			}
  
			return renderState;
  
		}
  
		function dispose() {
  
			renderStates = {};
  
		}
  
		return {
			get: get,
			dispose: dispose
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author bhouston / https://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>
	 * }
	 */
  
	function MeshDepthMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshDepthMaterial';
  
		this.depthPacking = BasicDepthPacking;
  
		this.skinning = false;
		this.morphTargets = false;
  
		this.map = null;
  
		this.alphaMap = null;
  
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
  
		this.fog = false;
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	MeshDepthMaterial.prototype = Object.create( Material.prototype );
	MeshDepthMaterial.prototype.constructor = MeshDepthMaterial;
  
	MeshDepthMaterial.prototype.isMeshDepthMaterial = true;
  
	MeshDepthMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.depthPacking = source.depthPacking;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
  
		this.map = source.map;
  
		this.alphaMap = source.alphaMap;
  
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
  
		return this;
  
	};
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *
	 *  referencePosition: <float>,
	 *  nearDistance: <float>,
	 *  farDistance: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>
	 *
	 * }
	 */
  
	function MeshDistanceMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshDistanceMaterial';
  
		this.referencePosition = new Vector3();
		this.nearDistance = 1;
		this.farDistance = 1000;
  
		this.skinning = false;
		this.morphTargets = false;
  
		this.map = null;
  
		this.alphaMap = null;
  
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
  
		this.fog = false;
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	MeshDistanceMaterial.prototype = Object.create( Material.prototype );
	MeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;
  
	MeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;
  
	MeshDistanceMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.referencePosition.copy( source.referencePosition );
		this.nearDistance = source.nearDistance;
		this.farDistance = source.farDistance;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
  
		this.map = source.map;
  
		this.alphaMap = source.alphaMap;
  
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
  
		return this;
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLShadowMap( _renderer, _objects, maxTextureSize ) {
  
		var _frustum = new Frustum(),
			_projScreenMatrix = new Matrix4(),
  
			_shadowMapSize = new Vector2(),
			_maxShadowMapSize = new Vector2( maxTextureSize, maxTextureSize ),
  
			_lookTarget = new Vector3(),
			_lightPositionWorld = new Vector3(),
  
			_MorphingFlag = 1,
			_SkinningFlag = 2,
  
			_NumberOfMaterialVariants = ( _MorphingFlag | _SkinningFlag ) + 1,
  
			_depthMaterials = new Array( _NumberOfMaterialVariants ),
			_distanceMaterials = new Array( _NumberOfMaterialVariants ),
  
			_materialCache = {};
  
		var shadowSide = { 0: BackSide, 1: FrontSide, 2: DoubleSide };
  
		var cubeDirections = [
			new Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),
			new Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )
		];
  
		var cubeUps = [
			new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),
			new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),	new Vector3( 0, 0, - 1 )
		];
  
		var cube2DViewPorts = [
			new Vector4(), new Vector4(), new Vector4(),
			new Vector4(), new Vector4(), new Vector4()
		];
  
		// init
  
		for ( var i = 0; i !== _NumberOfMaterialVariants; ++ i ) {
  
			var useMorphing = ( i & _MorphingFlag ) !== 0;
			var useSkinning = ( i & _SkinningFlag ) !== 0;
  
			var depthMaterial = new MeshDepthMaterial( {
  
				depthPacking: RGBADepthPacking,
  
				morphTargets: useMorphing,
				skinning: useSkinning
  
			} );
  
			_depthMaterials[ i ] = depthMaterial;
  
			//
  
			var distanceMaterial = new MeshDistanceMaterial( {
  
				morphTargets: useMorphing,
				skinning: useSkinning
  
			} );
  
			_distanceMaterials[ i ] = distanceMaterial;
  
		}
  
		//
  
		var scope = this;
  
		this.enabled = false;
  
		this.autoUpdate = true;
		this.needsUpdate = false;
  
		this.type = PCFShadowMap;
  
		this.render = function ( lights, scene, camera ) {
  
			if ( scope.enabled === false ) return;
			if ( scope.autoUpdate === false && scope.needsUpdate === false ) return;
  
			if ( lights.length === 0 ) return;
  
			// TODO Clean up (needed in case of contextlost)
			var _gl = _renderer.context;
			var _state = _renderer.state;
  
			// Set GL state for depth map.
			_state.disable( _gl.BLEND );
			_state.buffers.color.setClear( 1, 1, 1, 1 );
			_state.buffers.depth.setTest( true );
			_state.setScissorTest( false );
  
			// render depth map
  
			var faceCount;
  
			for ( var i = 0, il = lights.length; i < il; i ++ ) {
  
				var light = lights[ i ];
				var shadow = light.shadow;
				var isPointLight = light && light.isPointLight;
  
				if ( shadow === undefined ) {
  
					console.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );
					continue;
  
				}
  
				var shadowCamera = shadow.camera;
  
				_shadowMapSize.copy( shadow.mapSize );
				_shadowMapSize.min( _maxShadowMapSize );
  
				if ( isPointLight ) {
  
					var vpWidth = _shadowMapSize.x;
					var vpHeight = _shadowMapSize.y;
  
					// These viewports map a cube-map onto a 2D texture with the
					// following orientation:
					//
					//  xzXZ
					//   y Y
					//
					// X - Positive x direction
					// x - Negative x direction
					// Y - Positive y direction
					// y - Negative y direction
					// Z - Positive z direction
					// z - Negative z direction
  
					// positive X
					cube2DViewPorts[ 0 ].set( vpWidth * 2, vpHeight, vpWidth, vpHeight );
					// negative X
					cube2DViewPorts[ 1 ].set( 0, vpHeight, vpWidth, vpHeight );
					// positive Z
					cube2DViewPorts[ 2 ].set( vpWidth * 3, vpHeight, vpWidth, vpHeight );
					// negative Z
					cube2DViewPorts[ 3 ].set( vpWidth, vpHeight, vpWidth, vpHeight );
					// positive Y
					cube2DViewPorts[ 4 ].set( vpWidth * 3, 0, vpWidth, vpHeight );
					// negative Y
					cube2DViewPorts[ 5 ].set( vpWidth, 0, vpWidth, vpHeight );
  
					_shadowMapSize.x *= 4.0;
					_shadowMapSize.y *= 2.0;
  
				}
  
				if ( shadow.map === null ) {
  
					var pars = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };
  
					shadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );
					shadow.map.texture.name = light.name + ".shadowMap";
  
					shadowCamera.updateProjectionMatrix();
  
				}
  
				if ( shadow.isSpotLightShadow ) {
  
					shadow.update( light );
  
				}
  
				var shadowMap = shadow.map;
				var shadowMatrix = shadow.matrix;
  
				_lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
				shadowCamera.position.copy( _lightPositionWorld );
  
				if ( isPointLight ) {
  
					faceCount = 6;
  
					// for point lights we set the shadow matrix to be a translation-only matrix
					// equal to inverse of the light's position
  
					shadowMatrix.makeTranslation( - _lightPositionWorld.x, - _lightPositionWorld.y, - _lightPositionWorld.z );
  
				} else {
  
					faceCount = 1;
  
					_lookTarget.setFromMatrixPosition( light.target.matrixWorld );
					shadowCamera.lookAt( _lookTarget );
					shadowCamera.updateMatrixWorld();
  
					// compute shadow matrix
  
					shadowMatrix.set(
						0.5, 0.0, 0.0, 0.5,
						0.0, 0.5, 0.0, 0.5,
						0.0, 0.0, 0.5, 0.5,
						0.0, 0.0, 0.0, 1.0
					);
  
					shadowMatrix.multiply( shadowCamera.projectionMatrix );
					shadowMatrix.multiply( shadowCamera.matrixWorldInverse );
  
				}
  
				_renderer.setRenderTarget( shadowMap );
				_renderer.clear();
  
				// render shadow map for each cube face (if omni-directional) or
				// run a single pass if not
  
				for ( var face = 0; face < faceCount; face ++ ) {
  
					if ( isPointLight ) {
  
						_lookTarget.copy( shadowCamera.position );
						_lookTarget.add( cubeDirections[ face ] );
						shadowCamera.up.copy( cubeUps[ face ] );
						shadowCamera.lookAt( _lookTarget );
						shadowCamera.updateMatrixWorld();
  
						var vpDimensions = cube2DViewPorts[ face ];
						_state.viewport( vpDimensions );
  
					}
  
					// update camera matrices and frustum
  
					_projScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );
					_frustum.setFromMatrix( _projScreenMatrix );
  
					// set object matrices & frustum culling
  
					renderObject( scene, camera, shadowCamera, isPointLight );
  
				}
  
			}
  
			scope.needsUpdate = false;
  
		};
  
		function getDepthMaterial( object, material, isPointLight, lightPositionWorld, shadowCameraNear, shadowCameraFar ) {
  
			var geometry = object.geometry;
  
			var result = null;
  
			var materialVariants = _depthMaterials;
			var customMaterial = object.customDepthMaterial;
  
			if ( isPointLight ) {
  
				materialVariants = _distanceMaterials;
				customMaterial = object.customDistanceMaterial;
  
			}
  
			if ( ! customMaterial ) {
  
				var useMorphing = false;
  
				if ( material.morphTargets ) {
  
					if ( geometry && geometry.isBufferGeometry ) {
  
						useMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;
  
					} else if ( geometry && geometry.isGeometry ) {
  
						useMorphing = geometry.morphTargets && geometry.morphTargets.length > 0;
  
					}
  
				}
  
				if ( object.isSkinnedMesh && material.skinning === false ) {
  
					console.warn( 'THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object );
  
				}
  
				var useSkinning = object.isSkinnedMesh && material.skinning;
  
				var variantIndex = 0;
  
				if ( useMorphing ) variantIndex |= _MorphingFlag;
				if ( useSkinning ) variantIndex |= _SkinningFlag;
  
				result = materialVariants[ variantIndex ];
  
			} else {
  
				result = customMaterial;
  
			}
  
			if ( _renderer.localClippingEnabled &&
					material.clipShadows === true &&
					material.clippingPlanes.length !== 0 ) {
  
				// in this case we need a unique material instance reflecting the
				// appropriate state
  
				var keyA = result.uuid, keyB = material.uuid;
  
				var materialsForVariant = _materialCache[ keyA ];
  
				if ( materialsForVariant === undefined ) {
  
					materialsForVariant = {};
					_materialCache[ keyA ] = materialsForVariant;
  
				}
  
				var cachedMaterial = materialsForVariant[ keyB ];
  
				if ( cachedMaterial === undefined ) {
  
					cachedMaterial = result.clone();
					materialsForVariant[ keyB ] = cachedMaterial;
  
				}
  
				result = cachedMaterial;
  
			}
  
			result.visible = material.visible;
			result.wireframe = material.wireframe;
  
			result.side = ( material.shadowSide != null ) ? material.shadowSide : shadowSide[ material.side ];
  
			result.clipShadows = material.clipShadows;
			result.clippingPlanes = material.clippingPlanes;
			result.clipIntersection = material.clipIntersection;
  
			result.wireframeLinewidth = material.wireframeLinewidth;
			result.linewidth = material.linewidth;
  
			if ( isPointLight && result.isMeshDistanceMaterial ) {
  
				result.referencePosition.copy( lightPositionWorld );
				result.nearDistance = shadowCameraNear;
				result.farDistance = shadowCameraFar;
  
			}
  
			return result;
  
		}
  
		function renderObject( object, camera, shadowCamera, isPointLight ) {
  
			if ( object.visible === false ) return;
  
			var visible = object.layers.test( camera.layers );
  
			if ( visible && ( object.isMesh || object.isLine || object.isPoints ) ) {
  
				if ( object.castShadow && ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) ) {
  
					object.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );
  
					var geometry = _objects.update( object );
					var material = object.material;
  
					if ( Array.isArray( material ) ) {
  
						var groups = geometry.groups;
  
						for ( var k = 0, kl = groups.length; k < kl; k ++ ) {
  
							var group = groups[ k ];
							var groupMaterial = material[ group.materialIndex ];
  
							if ( groupMaterial && groupMaterial.visible ) {
  
								var depthMaterial = getDepthMaterial( object, groupMaterial, isPointLight, _lightPositionWorld, shadowCamera.near, shadowCamera.far );
								_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );
  
							}
  
						}
  
					} else if ( material.visible ) {
  
						var depthMaterial = getDepthMaterial( object, material, isPointLight, _lightPositionWorld, shadowCamera.near, shadowCamera.far );
						_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, null );
  
					}
  
				}
  
			}
  
			var children = object.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				renderObject( children[ i ], camera, shadowCamera, isPointLight );
  
			}
  
		}
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {
  
		Texture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );
  
		this.needsUpdate = true;
  
	}
  
	CanvasTexture.prototype = Object.create( Texture.prototype );
	CanvasTexture.prototype.constructor = CanvasTexture;
	CanvasTexture.prototype.isCanvasTexture = true;
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function WebGLSpriteRenderer( renderer, gl, state, textures, capabilities ) {
  
		var vertexBuffer, elementBuffer;
		var program, attributes, uniforms;
  
		var texture;
  
		// decompose matrixWorld
  
		var spritePosition = new Vector3();
		var spriteRotation = new Quaternion();
		var spriteScale = new Vector3();
  
		function init() {
  
			var vertices = new Float32Array( [
				- 0.5, - 0.5, 0, 0,
				  0.5, - 0.5, 1, 0,
				  0.5, 0.5, 1, 1,
				- 0.5, 0.5, 0, 1
			] );
  
			var faces = new Uint16Array( [
				0, 1, 2,
				0, 2, 3
			] );
  
			vertexBuffer = gl.createBuffer();
			elementBuffer = gl.createBuffer();
  
			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.bufferData( gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW );
  
			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
			gl.bufferData( gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW );
  
			program = createProgram();
  
			attributes = {
				position: gl.getAttribLocation( program, 'position' ),
				uv: gl.getAttribLocation( program, 'uv' )
			};
  
			uniforms = {
				uvOffset: gl.getUniformLocation( program, 'uvOffset' ),
				uvScale: gl.getUniformLocation( program, 'uvScale' ),
  
				rotation: gl.getUniformLocation( program, 'rotation' ),
				center: gl.getUniformLocation( program, 'center' ),
				scale: gl.getUniformLocation( program, 'scale' ),
  
				color: gl.getUniformLocation( program, 'color' ),
				map: gl.getUniformLocation( program, 'map' ),
				opacity: gl.getUniformLocation( program, 'opacity' ),
  
				modelViewMatrix: gl.getUniformLocation( program, 'modelViewMatrix' ),
				projectionMatrix: gl.getUniformLocation( program, 'projectionMatrix' ),
  
				fogType: gl.getUniformLocation( program, 'fogType' ),
				fogDensity: gl.getUniformLocation( program, 'fogDensity' ),
				fogNear: gl.getUniformLocation( program, 'fogNear' ),
				fogFar: gl.getUniformLocation( program, 'fogFar' ),
				fogColor: gl.getUniformLocation( program, 'fogColor' ),
				fogDepth: gl.getUniformLocation( program, 'fogDepth' ),
  
				alphaTest: gl.getUniformLocation( program, 'alphaTest' )
			};
  
			var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
			canvas.width = 8;
			canvas.height = 8;
  
			var context = canvas.getContext( '2d' );
			context.fillStyle = 'white';
			context.fillRect( 0, 0, 8, 8 );
  
			texture = new CanvasTexture( canvas );
  
		}
  
		this.render = function ( sprites, scene, camera ) {
  
			if ( sprites.length === 0 ) return;
  
			// setup gl
  
			if ( program === undefined ) {
  
				init();
  
			}
  
			state.useProgram( program );
  
			state.initAttributes();
			state.enableAttribute( attributes.position );
			state.enableAttribute( attributes.uv );
			state.disableUnusedAttributes();
  
			state.disable( gl.CULL_FACE );
			state.enable( gl.BLEND );
  
			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.vertexAttribPointer( attributes.position, 2, gl.FLOAT, false, 2 * 8, 0 );
			gl.vertexAttribPointer( attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8 );
  
			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
  
			gl.uniformMatrix4fv( uniforms.projectionMatrix, false, camera.projectionMatrix.elements );
  
			state.activeTexture( gl.TEXTURE0 );
			gl.uniform1i( uniforms.map, 0 );
  
			var oldFogType = 0;
			var sceneFogType = 0;
			var fog = scene.fog;
  
			if ( fog ) {
  
				gl.uniform3f( uniforms.fogColor, fog.color.r, fog.color.g, fog.color.b );
  
				if ( fog.isFog ) {
  
					gl.uniform1f( uniforms.fogNear, fog.near );
					gl.uniform1f( uniforms.fogFar, fog.far );
  
					gl.uniform1i( uniforms.fogType, 1 );
					oldFogType = 1;
					sceneFogType = 1;
  
				} else if ( fog.isFogExp2 ) {
  
					gl.uniform1f( uniforms.fogDensity, fog.density );
  
					gl.uniform1i( uniforms.fogType, 2 );
					oldFogType = 2;
					sceneFogType = 2;
  
				}
  
			} else {
  
				gl.uniform1i( uniforms.fogType, 0 );
				oldFogType = 0;
				sceneFogType = 0;
  
			}
  
  
			// update positions and sort
  
			for ( var i = 0, l = sprites.length; i < l; i ++ ) {
  
				var sprite = sprites[ i ];
  
				sprite.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, sprite.matrixWorld );
				sprite.z = - sprite.modelViewMatrix.elements[ 14 ];
  
			}
  
			sprites.sort( painterSortStable );
  
			// render all sprites
  
			var scale = [];
			var center = [];
  
			for ( var i = 0, l = sprites.length; i < l; i ++ ) {
  
				var sprite = sprites[ i ];
				var material = sprite.material;
  
				if ( material.visible === false ) continue;
  
				sprite.onBeforeRender( renderer, scene, camera, undefined, material, undefined );
  
				gl.uniform1f( uniforms.alphaTest, material.alphaTest );
				gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, sprite.modelViewMatrix.elements );
  
				sprite.matrixWorld.decompose( spritePosition, spriteRotation, spriteScale );
  
				scale[ 0 ] = spriteScale.x;
				scale[ 1 ] = spriteScale.y;
  
				center[ 0 ] = sprite.center.x - 0.5;
				center[ 1 ] = sprite.center.y - 0.5;
  
				var fogType = 0;
  
				if ( scene.fog && material.fog ) {
  
					fogType = sceneFogType;
  
				}
  
				if ( oldFogType !== fogType ) {
  
					gl.uniform1i( uniforms.fogType, fogType );
					oldFogType = fogType;
  
				}
  
				if ( material.map !== null ) {
  
					gl.uniform2f( uniforms.uvOffset, material.map.offset.x, material.map.offset.y );
					gl.uniform2f( uniforms.uvScale, material.map.repeat.x, material.map.repeat.y );
  
				} else {
  
					gl.uniform2f( uniforms.uvOffset, 0, 0 );
					gl.uniform2f( uniforms.uvScale, 1, 1 );
  
				}
  
				gl.uniform1f( uniforms.opacity, material.opacity );
				gl.uniform3f( uniforms.color, material.color.r, material.color.g, material.color.b );
  
				gl.uniform1f( uniforms.rotation, material.rotation );
				gl.uniform2fv( uniforms.center, center );
				gl.uniform2fv( uniforms.scale, scale );
  
				state.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );
				state.buffers.depth.setTest( material.depthTest );
				state.buffers.depth.setMask( material.depthWrite );
				state.buffers.color.setMask( material.colorWrite );
  
				textures.setTexture2D( material.map || texture, 0 );
  
				gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );
  
				sprite.onAfterRender( renderer, scene, camera, undefined, material, undefined );
  
			}
  
			// restore gl
  
			state.enable( gl.CULL_FACE );
  
			state.reset();
  
		};
  
		function createProgram() {
  
			var program = gl.createProgram();
  
			var vertexShader = gl.createShader( gl.VERTEX_SHADER );
			var fragmentShader = gl.createShader( gl.FRAGMENT_SHADER );
  
			gl.shaderSource( vertexShader, [
  
				'precision ' + capabilities.precision + ' float;',
  
				'#define SHADER_NAME ' + 'SpriteMaterial',
  
				'uniform mat4 modelViewMatrix;',
				'uniform mat4 projectionMatrix;',
				'uniform float rotation;',
				'uniform vec2 center;',
				'uniform vec2 scale;',
				'uniform vec2 uvOffset;',
				'uniform vec2 uvScale;',
  
				'attribute vec2 position;',
				'attribute vec2 uv;',
  
				'varying vec2 vUV;',
				'varying float fogDepth;',
  
				'void main() {',
  
				'	vUV = uvOffset + uv * uvScale;',
  
				'	vec2 alignedPosition = ( position - center ) * scale;',
  
				'	vec2 rotatedPosition;',
				'	rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;',
				'	rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;',
  
				'	vec4 mvPosition;',
  
				'	mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );',
				'	mvPosition.xy += rotatedPosition;',
  
				'	gl_Position = projectionMatrix * mvPosition;',
  
				'	fogDepth = - mvPosition.z;',
  
				'}'
  
			].join( '\n' ) );
  
			gl.shaderSource( fragmentShader, [
  
				'precision ' + capabilities.precision + ' float;',
  
				'#define SHADER_NAME ' + 'SpriteMaterial',
  
				'uniform vec3 color;',
				'uniform sampler2D map;',
				'uniform float opacity;',
  
				'uniform int fogType;',
				'uniform vec3 fogColor;',
				'uniform float fogDensity;',
				'uniform float fogNear;',
				'uniform float fogFar;',
				'uniform float alphaTest;',
  
				'varying vec2 vUV;',
				'varying float fogDepth;',
  
				'void main() {',
  
				'	vec4 texture = texture2D( map, vUV );',
  
				'	gl_FragColor = vec4( color * texture.xyz, texture.a * opacity );',
  
				'	if ( gl_FragColor.a < alphaTest ) discard;',
  
				'	if ( fogType > 0 ) {',
  
				'		float fogFactor = 0.0;',
  
				'		if ( fogType == 1 ) {',
  
				'			fogFactor = smoothstep( fogNear, fogFar, fogDepth );',
  
				'		} else {',
  
				'			const float LOG2 = 1.442695;',
				'			fogFactor = exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 );',
				'			fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );',
  
				'		}',
  
				'		gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );',
  
				'	}',
  
				'}'
  
			].join( '\n' ) );
  
			gl.compileShader( vertexShader );
			gl.compileShader( fragmentShader );
  
			gl.attachShader( program, vertexShader );
			gl.attachShader( program, fragmentShader );
  
			gl.linkProgram( program );
  
			return program;
  
		}
  
		function painterSortStable( a, b ) {
  
			if ( a.renderOrder !== b.renderOrder ) {
  
				return a.renderOrder - b.renderOrder;
  
			} else if ( a.z !== b.z ) {
  
				return b.z - a.z;
  
			} else {
  
				return b.id - a.id;
  
			}
  
		}
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLState( gl, extensions, utils ) {
  
		function ColorBuffer() {
  
			var locked = false;
  
			var color = new Vector4();
			var currentColorMask = null;
			var currentColorClear = new Vector4( 0, 0, 0, 0 );
  
			return {
  
				setMask: function ( colorMask ) {
  
					if ( currentColorMask !== colorMask && ! locked ) {
  
						gl.colorMask( colorMask, colorMask, colorMask, colorMask );
						currentColorMask = colorMask;
  
					}
  
				},
  
				setLocked: function ( lock ) {
  
					locked = lock;
  
				},
  
				setClear: function ( r, g, b, a, premultipliedAlpha ) {
  
					if ( premultipliedAlpha === true ) {
  
						r *= a; g *= a; b *= a;
  
					}
  
					color.set( r, g, b, a );
  
					if ( currentColorClear.equals( color ) === false ) {
  
						gl.clearColor( r, g, b, a );
						currentColorClear.copy( color );
  
					}
  
				},
  
				reset: function () {
  
					locked = false;
  
					currentColorMask = null;
					currentColorClear.set( - 1, 0, 0, 0 ); // set to invalid state
  
				}
  
			};
  
		}
  
		function DepthBuffer() {
  
			var locked = false;
  
			var currentDepthMask = null;
			var currentDepthFunc = null;
			var currentDepthClear = null;
  
			return {
  
				setTest: function ( depthTest ) {
  
					if ( depthTest ) {
  
						enable( gl.DEPTH_TEST );
  
					} else {
  
						disable( gl.DEPTH_TEST );
  
					}
  
				},
  
				setMask: function ( depthMask ) {
  
					if ( currentDepthMask !== depthMask && ! locked ) {
  
						gl.depthMask( depthMask );
						currentDepthMask = depthMask;
  
					}
  
				},
  
				setFunc: function ( depthFunc ) {
  
					if ( currentDepthFunc !== depthFunc ) {
  
						if ( depthFunc ) {
  
							switch ( depthFunc ) {
  
								case NeverDepth:
  
									gl.depthFunc( gl.NEVER );
									break;
  
								case AlwaysDepth:
  
									gl.depthFunc( gl.ALWAYS );
									break;
  
								case LessDepth:
  
									gl.depthFunc( gl.LESS );
									break;
  
								case LessEqualDepth:
  
									gl.depthFunc( gl.LEQUAL );
									break;
  
								case EqualDepth:
  
									gl.depthFunc( gl.EQUAL );
									break;
  
								case GreaterEqualDepth:
  
									gl.depthFunc( gl.GEQUAL );
									break;
  
								case GreaterDepth:
  
									gl.depthFunc( gl.GREATER );
									break;
  
								case NotEqualDepth:
  
									gl.depthFunc( gl.NOTEQUAL );
									break;
  
								default:
  
									gl.depthFunc( gl.LEQUAL );
  
							}
  
						} else {
  
							gl.depthFunc( gl.LEQUAL );
  
						}
  
						currentDepthFunc = depthFunc;
  
					}
  
				},
  
				setLocked: function ( lock ) {
  
					locked = lock;
  
				},
  
				setClear: function ( depth ) {
  
					if ( currentDepthClear !== depth ) {
  
						gl.clearDepth( depth );
						currentDepthClear = depth;
  
					}
  
				},
  
				reset: function () {
  
					locked = false;
  
					currentDepthMask = null;
					currentDepthFunc = null;
					currentDepthClear = null;
  
				}
  
			};
  
		}
  
		function StencilBuffer() {
  
			var locked = false;
  
			var currentStencilMask = null;
			var currentStencilFunc = null;
			var currentStencilRef = null;
			var currentStencilFuncMask = null;
			var currentStencilFail = null;
			var currentStencilZFail = null;
			var currentStencilZPass = null;
			var currentStencilClear = null;
  
			return {
  
				setTest: function ( stencilTest ) {
  
					if ( stencilTest ) {
  
						enable( gl.STENCIL_TEST );
  
					} else {
  
						disable( gl.STENCIL_TEST );
  
					}
  
				},
  
				setMask: function ( stencilMask ) {
  
					if ( currentStencilMask !== stencilMask && ! locked ) {
  
						gl.stencilMask( stencilMask );
						currentStencilMask = stencilMask;
  
					}
  
				},
  
				setFunc: function ( stencilFunc, stencilRef, stencilMask ) {
  
					if ( currentStencilFunc !== stencilFunc ||
						 currentStencilRef 	!== stencilRef 	||
						 currentStencilFuncMask !== stencilMask ) {
  
						gl.stencilFunc( stencilFunc, stencilRef, stencilMask );
  
						currentStencilFunc = stencilFunc;
						currentStencilRef = stencilRef;
						currentStencilFuncMask = stencilMask;
  
					}
  
				},
  
				setOp: function ( stencilFail, stencilZFail, stencilZPass ) {
  
					if ( currentStencilFail	 !== stencilFail 	||
						 currentStencilZFail !== stencilZFail ||
						 currentStencilZPass !== stencilZPass ) {
  
						gl.stencilOp( stencilFail, stencilZFail, stencilZPass );
  
						currentStencilFail = stencilFail;
						currentStencilZFail = stencilZFail;
						currentStencilZPass = stencilZPass;
  
					}
  
				},
  
				setLocked: function ( lock ) {
  
					locked = lock;
  
				},
  
				setClear: function ( stencil ) {
  
					if ( currentStencilClear !== stencil ) {
  
						gl.clearStencil( stencil );
						currentStencilClear = stencil;
  
					}
  
				},
  
				reset: function () {
  
					locked = false;
  
					currentStencilMask = null;
					currentStencilFunc = null;
					currentStencilRef = null;
					currentStencilFuncMask = null;
					currentStencilFail = null;
					currentStencilZFail = null;
					currentStencilZPass = null;
					currentStencilClear = null;
  
				}
  
			};
  
		}
  
		//
  
		var colorBuffer = new ColorBuffer();
		var depthBuffer = new DepthBuffer();
		var stencilBuffer = new StencilBuffer();
  
		var maxVertexAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
		var newAttributes = new Uint8Array( maxVertexAttributes );
		var enabledAttributes = new Uint8Array( maxVertexAttributes );
		var attributeDivisors = new Uint8Array( maxVertexAttributes );
  
		var capabilities = {};
  
		var compressedTextureFormats = null;
  
		var currentProgram = null;
  
		var currentBlending = null;
		var currentBlendEquation = null;
		var currentBlendSrc = null;
		var currentBlendDst = null;
		var currentBlendEquationAlpha = null;
		var currentBlendSrcAlpha = null;
		var currentBlendDstAlpha = null;
		var currentPremultipledAlpha = false;
  
		var currentFlipSided = null;
		var currentCullFace = null;
  
		var currentLineWidth = null;
  
		var currentPolygonOffsetFactor = null;
		var currentPolygonOffsetUnits = null;
  
		var maxTextures = gl.getParameter( gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS );
  
		var lineWidthAvailable = false;
		var version = 0;
		var glVersion = gl.getParameter( gl.VERSION );
  
		if ( glVersion.indexOf( 'WebGL' ) !== - 1 ) {
  
			version = parseFloat( /^WebGL\ ([0-9])/.exec( glVersion )[ 1 ] );
			lineWidthAvailable = ( version >= 1.0 );
  
		} else if ( glVersion.indexOf( 'OpenGL ES' ) !== - 1 ) {
  
			version = parseFloat( /^OpenGL\ ES\ ([0-9])/.exec( glVersion )[ 1 ] );
			lineWidthAvailable = ( version >= 2.0 );
  
		}
  
		var currentTextureSlot = null;
		var currentBoundTextures = {};
  
		var currentScissor = new Vector4();
		var currentViewport = new Vector4();
  
		function createTexture( type, target, count ) {
  
			var data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.
			var texture = gl.createTexture();
  
			gl.bindTexture( type, texture );
			gl.texParameteri( type, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
			gl.texParameteri( type, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
  
			for ( var i = 0; i < count; i ++ ) {
  
				gl.texImage2D( target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );
  
			}
  
			return texture;
  
		}
  
		var emptyTextures = {};
		emptyTextures[ gl.TEXTURE_2D ] = createTexture( gl.TEXTURE_2D, gl.TEXTURE_2D, 1 );
		emptyTextures[ gl.TEXTURE_CUBE_MAP ] = createTexture( gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6 );
  
		// init
  
		colorBuffer.setClear( 0, 0, 0, 1 );
		depthBuffer.setClear( 1 );
		stencilBuffer.setClear( 0 );
  
		enable( gl.DEPTH_TEST );
		depthBuffer.setFunc( LessEqualDepth );
  
		setFlipSided( false );
		setCullFace( CullFaceBack );
		enable( gl.CULL_FACE );
  
		enable( gl.BLEND );
		setBlending( NormalBlending );
  
		//
  
		function initAttributes() {
  
			for ( var i = 0, l = newAttributes.length; i < l; i ++ ) {
  
				newAttributes[ i ] = 0;
  
			}
  
		}
  
		function enableAttribute( attribute ) {
  
			enableAttributeAndDivisor( attribute, 0 );
  
		}
  
		function enableAttributeAndDivisor( attribute, meshPerAttribute ) {
  
			newAttributes[ attribute ] = 1;
  
			if ( enabledAttributes[ attribute ] === 0 ) {
  
				gl.enableVertexAttribArray( attribute );
				enabledAttributes[ attribute ] = 1;
  
			}
  
			if ( attributeDivisors[ attribute ] !== meshPerAttribute ) {
  
				var extension = extensions.get( 'ANGLE_instanced_arrays' );
  
				extension.vertexAttribDivisorANGLE( attribute, meshPerAttribute );
				attributeDivisors[ attribute ] = meshPerAttribute;
  
			}
  
		}
  
		function disableUnusedAttributes() {
  
			for ( var i = 0, l = enabledAttributes.length; i !== l; ++ i ) {
  
				if ( enabledAttributes[ i ] !== newAttributes[ i ] ) {
  
					gl.disableVertexAttribArray( i );
					enabledAttributes[ i ] = 0;
  
				}
  
			}
  
		}
  
		function enable( id ) {
  
			if ( capabilities[ id ] !== true ) {
  
				gl.enable( id );
				capabilities[ id ] = true;
  
			}
  
		}
  
		function disable( id ) {
  
			if ( capabilities[ id ] !== false ) {
  
				gl.disable( id );
				capabilities[ id ] = false;
  
			}
  
		}
  
		function getCompressedTextureFormats() {
  
			if ( compressedTextureFormats === null ) {
  
				compressedTextureFormats = [];
  
				if ( extensions.get( 'WEBGL_compressed_texture_pvrtc' ) ||
					 extensions.get( 'WEBGL_compressed_texture_s3tc' ) ||
					 extensions.get( 'WEBGL_compressed_texture_etc1' ) ||
					 extensions.get( 'WEBGL_compressed_texture_astc' ) ) {
  
					var formats = gl.getParameter( gl.COMPRESSED_TEXTURE_FORMATS );
  
					for ( var i = 0; i < formats.length; i ++ ) {
  
						compressedTextureFormats.push( formats[ i ] );
  
					}
  
				}
  
			}
  
			return compressedTextureFormats;
  
		}
  
		function useProgram( program ) {
  
			if ( currentProgram !== program ) {
  
				gl.useProgram( program );
  
				currentProgram = program;
  
				return true;
  
			}
  
			return false;
  
		}
  
		function setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {
  
			if ( blending !== NoBlending ) {
  
				enable( gl.BLEND );
  
			} else {
  
				disable( gl.BLEND );
  
			}
  
			if ( blending !== CustomBlending ) {
  
				if ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {
  
					switch ( blending ) {
  
						case AdditiveBlending:
  
							if ( premultipliedAlpha ) {
  
								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ONE, gl.ONE, gl.ONE, gl.ONE );
  
							} else {
  
								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.SRC_ALPHA, gl.ONE );
  
							}
							break;
  
						case SubtractiveBlending:
  
							if ( premultipliedAlpha ) {
  
								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ZERO, gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ONE_MINUS_SRC_ALPHA );
  
							} else {
  
								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.ZERO, gl.ONE_MINUS_SRC_COLOR );
  
							}
							break;
  
						case MultiplyBlending:
  
							if ( premultipliedAlpha ) {
  
								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA );
  
							} else {
  
								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.ZERO, gl.SRC_COLOR );
  
							}
							break;
  
						default:
  
							if ( premultipliedAlpha ) {
  
								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );
  
							} else {
  
								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );
  
							}
  
					}
  
				}
  
				currentBlendEquation = null;
				currentBlendSrc = null;
				currentBlendDst = null;
				currentBlendEquationAlpha = null;
				currentBlendSrcAlpha = null;
				currentBlendDstAlpha = null;
  
			} else {
  
				blendEquationAlpha = blendEquationAlpha || blendEquation;
				blendSrcAlpha = blendSrcAlpha || blendSrc;
				blendDstAlpha = blendDstAlpha || blendDst;
  
				if ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {
  
					gl.blendEquationSeparate( utils.convert( blendEquation ), utils.convert( blendEquationAlpha ) );
  
					currentBlendEquation = blendEquation;
					currentBlendEquationAlpha = blendEquationAlpha;
  
				}
  
				if ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {
  
					gl.blendFuncSeparate( utils.convert( blendSrc ), utils.convert( blendDst ), utils.convert( blendSrcAlpha ), utils.convert( blendDstAlpha ) );
  
					currentBlendSrc = blendSrc;
					currentBlendDst = blendDst;
					currentBlendSrcAlpha = blendSrcAlpha;
					currentBlendDstAlpha = blendDstAlpha;
  
				}
  
			}
  
			currentBlending = blending;
			currentPremultipledAlpha = premultipliedAlpha;
  
		}
  
		function setMaterial( material, frontFaceCW ) {
  
			material.side === DoubleSide
				? disable( gl.CULL_FACE )
				: enable( gl.CULL_FACE );
  
			var flipSided = ( material.side === BackSide );
			if ( frontFaceCW ) flipSided = ! flipSided;
  
			setFlipSided( flipSided );
  
			material.transparent === true
				? setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha )
				: setBlending( NoBlending );
  
			depthBuffer.setFunc( material.depthFunc );
			depthBuffer.setTest( material.depthTest );
			depthBuffer.setMask( material.depthWrite );
			colorBuffer.setMask( material.colorWrite );
  
			setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );
  
		}
  
		//
  
		function setFlipSided( flipSided ) {
  
			if ( currentFlipSided !== flipSided ) {
  
				if ( flipSided ) {
  
					gl.frontFace( gl.CW );
  
				} else {
  
					gl.frontFace( gl.CCW );
  
				}
  
				currentFlipSided = flipSided;
  
			}
  
		}
  
		function setCullFace( cullFace ) {
  
			if ( cullFace !== CullFaceNone ) {
  
				enable( gl.CULL_FACE );
  
				if ( cullFace !== currentCullFace ) {
  
					if ( cullFace === CullFaceBack ) {
  
						gl.cullFace( gl.BACK );
  
					} else if ( cullFace === CullFaceFront ) {
  
						gl.cullFace( gl.FRONT );
  
					} else {
  
						gl.cullFace( gl.FRONT_AND_BACK );
  
					}
  
				}
  
			} else {
  
				disable( gl.CULL_FACE );
  
			}
  
			currentCullFace = cullFace;
  
		}
  
		function setLineWidth( width ) {
  
			if ( width !== currentLineWidth ) {
  
				if ( lineWidthAvailable ) gl.lineWidth( width );
  
				currentLineWidth = width;
  
			}
  
		}
  
		function setPolygonOffset( polygonOffset, factor, units ) {
  
			if ( polygonOffset ) {
  
				enable( gl.POLYGON_OFFSET_FILL );
  
				if ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {
  
					gl.polygonOffset( factor, units );
  
					currentPolygonOffsetFactor = factor;
					currentPolygonOffsetUnits = units;
  
				}
  
			} else {
  
				disable( gl.POLYGON_OFFSET_FILL );
  
			}
  
		}
  
		function setScissorTest( scissorTest ) {
  
			if ( scissorTest ) {
  
				enable( gl.SCISSOR_TEST );
  
			} else {
  
				disable( gl.SCISSOR_TEST );
  
			}
  
		}
  
		// texture
  
		function activeTexture( webglSlot ) {
  
			if ( webglSlot === undefined ) webglSlot = gl.TEXTURE0 + maxTextures - 1;
  
			if ( currentTextureSlot !== webglSlot ) {
  
				gl.activeTexture( webglSlot );
				currentTextureSlot = webglSlot;
  
			}
  
		}
  
		function bindTexture( webglType, webglTexture ) {
  
			if ( currentTextureSlot === null ) {
  
				activeTexture();
  
			}
  
			var boundTexture = currentBoundTextures[ currentTextureSlot ];
  
			if ( boundTexture === undefined ) {
  
				boundTexture = { type: undefined, texture: undefined };
				currentBoundTextures[ currentTextureSlot ] = boundTexture;
  
			}
  
			if ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {
  
				gl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );
  
				boundTexture.type = webglType;
				boundTexture.texture = webglTexture;
  
			}
  
		}
  
		function compressedTexImage2D() {
  
			try {
  
				gl.compressedTexImage2D.apply( gl, arguments );
  
			} catch ( error ) {
  
				console.error( 'THREE.WebGLState:', error );
  
			}
  
		}
  
		function texImage2D() {
  
			try {
  
				gl.texImage2D.apply( gl, arguments );
  
			} catch ( error ) {
  
				console.error( 'THREE.WebGLState:', error );
  
			}
  
		}
  
		//
  
		function scissor( scissor ) {
  
			if ( currentScissor.equals( scissor ) === false ) {
  
				gl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );
				currentScissor.copy( scissor );
  
			}
  
		}
  
		function viewport( viewport ) {
  
			if ( currentViewport.equals( viewport ) === false ) {
  
				gl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );
				currentViewport.copy( viewport );
  
			}
  
		}
  
		//
  
		function reset() {
  
			for ( var i = 0; i < enabledAttributes.length; i ++ ) {
  
				if ( enabledAttributes[ i ] === 1 ) {
  
					gl.disableVertexAttribArray( i );
					enabledAttributes[ i ] = 0;
  
				}
  
			}
  
			capabilities = {};
  
			compressedTextureFormats = null;
  
			currentTextureSlot = null;
			currentBoundTextures = {};
  
			currentProgram = null;
  
			currentBlending = null;
  
			currentFlipSided = null;
			currentCullFace = null;
  
			colorBuffer.reset();
			depthBuffer.reset();
			stencilBuffer.reset();
  
		}
  
		return {
  
			buffers: {
				color: colorBuffer,
				depth: depthBuffer,
				stencil: stencilBuffer
			},
  
			initAttributes: initAttributes,
			enableAttribute: enableAttribute,
			enableAttributeAndDivisor: enableAttributeAndDivisor,
			disableUnusedAttributes: disableUnusedAttributes,
			enable: enable,
			disable: disable,
			getCompressedTextureFormats: getCompressedTextureFormats,
  
			useProgram: useProgram,
  
			setBlending: setBlending,
			setMaterial: setMaterial,
  
			setFlipSided: setFlipSided,
			setCullFace: setCullFace,
  
			setLineWidth: setLineWidth,
			setPolygonOffset: setPolygonOffset,
  
			setScissorTest: setScissorTest,
  
			activeTexture: activeTexture,
			bindTexture: bindTexture,
			compressedTexImage2D: compressedTexImage2D,
			texImage2D: texImage2D,
  
			scissor: scissor,
			viewport: viewport,
  
			reset: reset
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info ) {
  
		var _isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && _gl instanceof WebGL2RenderingContext ); /* global WebGL2RenderingContext */
		var _videoTextures = {};
		var _canvas;
  
		//
  
		function clampToMaxSize( image, maxSize ) {
  
			if ( image.width > maxSize || image.height > maxSize ) {
  
				if ( 'data' in image ) {
  
					console.warn( 'THREE.WebGLRenderer: image in DataTexture is too big (' + image.width + 'x' + image.height + ').' );
					return;
  
				}
  
				// Warning: Scaling through the canvas will only work with images that use
				// premultiplied alpha.
  
				var scale = maxSize / Math.max( image.width, image.height );
  
				var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
				canvas.width = Math.floor( image.width * scale );
				canvas.height = Math.floor( image.height * scale );
  
				var context = canvas.getContext( '2d' );
				context.drawImage( image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height );
  
				console.warn( 'THREE.WebGLRenderer: image is too big (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image );
  
				return canvas;
  
			}
  
			return image;
  
		}
  
		function isPowerOfTwo( image ) {
  
			return _Math.isPowerOfTwo( image.width ) && _Math.isPowerOfTwo( image.height );
  
		}
  
		function makePowerOfTwo( image ) {
  
			if ( image instanceof HTMLImageElement || image instanceof HTMLCanvasElement || image instanceof ImageBitmap ) {
  
				if ( _canvas === undefined ) _canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
  
				_canvas.width = _Math.floorPowerOfTwo( image.width );
				_canvas.height = _Math.floorPowerOfTwo( image.height );
  
				var context = _canvas.getContext( '2d' );
				context.drawImage( image, 0, 0, _canvas.width, _canvas.height );
  
				console.warn( 'THREE.WebGLRenderer: image is not power of two (' + image.width + 'x' + image.height + '). Resized to ' + _canvas.width + 'x' + _canvas.height, image );
  
				return _canvas;
  
			}
  
			return image;
  
		}
  
		function textureNeedsPowerOfTwo( texture ) {
  
			return ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) ||
				( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter );
  
		}
  
		function textureNeedsGenerateMipmaps( texture, isPowerOfTwo ) {
  
			return texture.generateMipmaps && isPowerOfTwo &&
				texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
  
		}
  
		function generateMipmap( target, texture, width, height ) {
  
			_gl.generateMipmap( target );
  
			var textureProperties = properties.get( texture );
  
			// Note: Math.log( x ) * Math.LOG2E used instead of Math.log2( x ) which is not supported by IE11
			textureProperties.__maxMipLevel = Math.log( Math.max( width, height ) ) * Math.LOG2E;
  
		}
  
		// Fallback filters for non-power-of-2 textures
  
		function filterFallback( f ) {
  
			if ( f === NearestFilter || f === NearestMipMapNearestFilter || f === NearestMipMapLinearFilter ) {
  
				return _gl.NEAREST;
  
			}
  
			return _gl.LINEAR;
  
		}
  
		//
  
		function onTextureDispose( event ) {
  
			var texture = event.target;
  
			texture.removeEventListener( 'dispose', onTextureDispose );
  
			deallocateTexture( texture );
  
			if ( texture.isVideoTexture ) {
  
				delete _videoTextures[ texture.id ];
  
			}
  
			info.memory.textures --;
  
		}
  
		function onRenderTargetDispose( event ) {
  
			var renderTarget = event.target;
  
			renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );
  
			deallocateRenderTarget( renderTarget );
  
			info.memory.textures --;
  
		}
  
		//
  
		function deallocateTexture( texture ) {
  
			var textureProperties = properties.get( texture );
  
			if ( texture.image && textureProperties.__image__webglTextureCube ) {
  
				// cube texture
  
				_gl.deleteTexture( textureProperties.__image__webglTextureCube );
  
			} else {
  
				// 2D texture
  
				if ( textureProperties.__webglInit === undefined ) return;
  
				_gl.deleteTexture( textureProperties.__webglTexture );
  
			}
  
			// remove all webgl properties
			properties.remove( texture );
  
		}
  
		function deallocateRenderTarget( renderTarget ) {
  
			var renderTargetProperties = properties.get( renderTarget );
			var textureProperties = properties.get( renderTarget.texture );
  
			if ( ! renderTarget ) return;
  
			if ( textureProperties.__webglTexture !== undefined ) {
  
				_gl.deleteTexture( textureProperties.__webglTexture );
  
			}
  
			if ( renderTarget.depthTexture ) {
  
				renderTarget.depthTexture.dispose();
  
			}
  
			if ( renderTarget.isWebGLRenderTargetCube ) {
  
				for ( var i = 0; i < 6; i ++ ) {
  
					_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );
					if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );
  
				}
  
			} else {
  
				_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );
				if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );
  
			}
  
			properties.remove( renderTarget.texture );
			properties.remove( renderTarget );
  
		}
  
		//
  
  
  
		function setTexture2D( texture, slot ) {
  
			var textureProperties = properties.get( texture );
  
			if ( texture.isVideoTexture ) updateVideoTexture( texture );
  
			if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
  
				var image = texture.image;
  
				if ( image === undefined ) {
  
					console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined', texture );
  
				} else if ( image.complete === false ) {
  
					console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete', texture );
  
				} else {
  
					uploadTexture( textureProperties, texture, slot );
					return;
  
				}
  
			}
  
			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );
  
		}
  
		function setTextureCube( texture, slot ) {
  
			var textureProperties = properties.get( texture );
  
			if ( texture.image.length === 6 ) {
  
				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
  
					if ( ! textureProperties.__image__webglTextureCube ) {
  
						texture.addEventListener( 'dispose', onTextureDispose );
  
						textureProperties.__image__webglTextureCube = _gl.createTexture();
  
						info.memory.textures ++;
  
					}
  
					state.activeTexture( _gl.TEXTURE0 + slot );
					state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );
  
					_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
  
					var isCompressed = ( texture && texture.isCompressedTexture );
					var isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );
  
					var cubeImage = [];
  
					for ( var i = 0; i < 6; i ++ ) {
  
						if ( ! isCompressed && ! isDataTexture ) {
  
							cubeImage[ i ] = clampToMaxSize( texture.image[ i ], capabilities.maxCubemapSize );
  
						} else {
  
							cubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];
  
						}
  
					}
  
					var image = cubeImage[ 0 ],
						isPowerOfTwoImage = isPowerOfTwo( image ),
						glFormat = utils.convert( texture.format ),
						glType = utils.convert( texture.type );
  
					setTextureParameters( _gl.TEXTURE_CUBE_MAP, texture, isPowerOfTwoImage );
  
					for ( var i = 0; i < 6; i ++ ) {
  
						if ( ! isCompressed ) {
  
							if ( isDataTexture ) {
  
								state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, cubeImage[ i ].width, cubeImage[ i ].height, 0, glFormat, glType, cubeImage[ i ].data );
  
							} else {
  
								state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[ i ] );
  
							}
  
						} else {
  
							var mipmap, mipmaps = cubeImage[ i ].mipmaps;
  
							for ( var j = 0, jl = mipmaps.length; j < jl; j ++ ) {
  
								mipmap = mipmaps[ j ];
  
								if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {
  
									if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {
  
										state.compressedTexImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );
  
									} else {
  
										console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()' );
  
									}
  
								} else {
  
									state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );
  
								}
  
							}
  
						}
  
					}
  
					if ( ! isCompressed ) {
  
						textureProperties.__maxMipLevel = 0;
  
					} else {
  
						textureProperties.__maxMipLevel = mipmaps.length - 1;
  
					}
  
					if ( textureNeedsGenerateMipmaps( texture, isPowerOfTwoImage ) ) {
  
						// We assume images for cube map have the same size.
						generateMipmap( _gl.TEXTURE_CUBE_MAP, texture, image.width, image.height );
  
					}
  
					textureProperties.__version = texture.version;
  
					if ( texture.onUpdate ) texture.onUpdate( texture );
  
				} else {
  
					state.activeTexture( _gl.TEXTURE0 + slot );
					state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );
  
				}
  
			}
  
		}
  
		function setTextureCubeDynamic( texture, slot ) {
  
			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_CUBE_MAP, properties.get( texture ).__webglTexture );
  
		}
  
		function setTextureParameters( textureType, texture, isPowerOfTwoImage ) {
  
			var extension;
  
			if ( isPowerOfTwoImage ) {
  
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, utils.convert( texture.wrapS ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, utils.convert( texture.wrapT ) );
  
				_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, utils.convert( texture.magFilter ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, utils.convert( texture.minFilter ) );
  
			} else {
  
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );
  
				if ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {
  
					console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.', texture );
  
				}
  
				_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, filterFallback( texture.magFilter ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, filterFallback( texture.minFilter ) );
  
				if ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {
  
					console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.', texture );
  
				}
  
			}
  
			extension = extensions.get( 'EXT_texture_filter_anisotropic' );
  
			if ( extension ) {
  
				if ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) return;
				if ( texture.type === HalfFloatType && extensions.get( 'OES_texture_half_float_linear' ) === null ) return;
  
				if ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {
  
					_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );
					properties.get( texture ).__currentAnisotropy = texture.anisotropy;
  
				}
  
			}
  
		}
  
		function uploadTexture( textureProperties, texture, slot ) {
  
			if ( textureProperties.__webglInit === undefined ) {
  
				textureProperties.__webglInit = true;
  
				texture.addEventListener( 'dispose', onTextureDispose );
  
				textureProperties.__webglTexture = _gl.createTexture();
  
				info.memory.textures ++;
  
			}
  
			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );
  
			_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
			_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
			_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
  
			var image = clampToMaxSize( texture.image, capabilities.maxTextureSize );
  
			if ( textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( image ) === false ) {
  
				image = makePowerOfTwo( image );
  
			}
  
			var isPowerOfTwoImage = isPowerOfTwo( image ),
				glFormat = utils.convert( texture.format ),
				glType = utils.convert( texture.type );
  
			setTextureParameters( _gl.TEXTURE_2D, texture, isPowerOfTwoImage );
  
			var mipmap, mipmaps = texture.mipmaps;
  
			if ( texture.isDepthTexture ) {
  
				// populate depth texture with dummy data
  
				var internalFormat = _gl.DEPTH_COMPONENT;
  
				if ( texture.type === FloatType ) {
  
					if ( ! _isWebGL2 ) throw new Error( 'Float Depth Texture only supported in WebGL2.0' );
					internalFormat = _gl.DEPTH_COMPONENT32F;
  
				} else if ( _isWebGL2 ) {
  
					// WebGL 2.0 requires signed internalformat for glTexImage2D
					internalFormat = _gl.DEPTH_COMPONENT16;
  
				}
  
				if ( texture.format === DepthFormat && internalFormat === _gl.DEPTH_COMPONENT ) {
  
					// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					if ( texture.type !== UnsignedShortType && texture.type !== UnsignedIntType ) {
  
						console.warn( 'THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.' );
  
						texture.type = UnsignedShortType;
						glType = utils.convert( texture.type );
  
					}
  
				}
  
				// Depth stencil textures need the DEPTH_STENCIL internal format
				// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
				if ( texture.format === DepthStencilFormat ) {
  
					internalFormat = _gl.DEPTH_STENCIL;
  
					// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					if ( texture.type !== UnsignedInt248Type ) {
  
						console.warn( 'THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.' );
  
						texture.type = UnsignedInt248Type;
						glType = utils.convert( texture.type );
  
					}
  
				}
  
				state.texImage2D( _gl.TEXTURE_2D, 0, internalFormat, image.width, image.height, 0, glFormat, glType, null );
  
			} else if ( texture.isDataTexture ) {
  
				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels
  
				if ( mipmaps.length > 0 && isPowerOfTwoImage ) {
  
					for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {
  
						mipmap = mipmaps[ i ];
						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );
  
					}
  
					texture.generateMipmaps = false;
					textureProperties.__maxMipLevel = mipmaps.length - 1;
  
				} else {
  
					state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, image.width, image.height, 0, glFormat, glType, image.data );
					textureProperties.__maxMipLevel = 0;
  
				}
  
			} else if ( texture.isCompressedTexture ) {
  
				for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {
  
					mipmap = mipmaps[ i ];
  
					if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {
  
						if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {
  
							state.compressedTexImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );
  
						} else {
  
							console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );
  
						}
  
					} else {
  
						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );
  
					}
  
				}
  
				textureProperties.__maxMipLevel = mipmaps.length - 1;
  
			} else {
  
				// regular Texture (image, video, canvas)
  
				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels
  
				if ( mipmaps.length > 0 && isPowerOfTwoImage ) {
  
					for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {
  
						mipmap = mipmaps[ i ];
						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, glFormat, glType, mipmap );
  
					}
  
					texture.generateMipmaps = false;
					textureProperties.__maxMipLevel = mipmaps.length - 1;
  
				} else {
  
					state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, glFormat, glType, image );
					textureProperties.__maxMipLevel = 0;
  
				}
  
			}
  
			if ( textureNeedsGenerateMipmaps( texture, isPowerOfTwoImage ) ) {
  
				generateMipmap( _gl.TEXTURE_2D, texture, image.width, image.height );
  
			}
  
			textureProperties.__version = texture.version;
  
			if ( texture.onUpdate ) texture.onUpdate( texture );
  
		}
  
		// Render targets
  
		// Setup storage for target texture and bind it to correct framebuffer
		function setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {
  
			var glFormat = utils.convert( renderTarget.texture.format );
			var glType = utils.convert( renderTarget.texture.type );
			state.texImage2D( textureTarget, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
			_gl.framebufferTexture2D( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );
  
		}
  
		// Setup storage for internal depth/stencil buffers and bind to correct framebuffer
		function setupRenderBufferStorage( renderbuffer, renderTarget ) {
  
			_gl.bindRenderbuffer( _gl.RENDERBUFFER, renderbuffer );
  
			if ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {
  
				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_COMPONENT16, renderTarget.width, renderTarget.height );
				_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );
  
			} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {
  
				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height );
				_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );
  
			} else {
  
				// FIXME: We don't support !depth !stencil
				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.RGBA4, renderTarget.width, renderTarget.height );
  
			}
  
			_gl.bindRenderbuffer( _gl.RENDERBUFFER, null );
  
		}
  
		// Setup resources for a Depth Texture for a FBO (needs an extension)
		function setupDepthTexture( framebuffer, renderTarget ) {
  
			var isCube = ( renderTarget && renderTarget.isWebGLRenderTargetCube );
			if ( isCube ) throw new Error( 'Depth Texture with cube render targets is not supported' );
  
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
  
			if ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) {
  
				throw new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' );
  
			}
  
			// upload an empty depth texture with framebuffer size
			if ( ! properties.get( renderTarget.depthTexture ).__webglTexture ||
					renderTarget.depthTexture.image.width !== renderTarget.width ||
					renderTarget.depthTexture.image.height !== renderTarget.height ) {
  
				renderTarget.depthTexture.image.width = renderTarget.width;
				renderTarget.depthTexture.image.height = renderTarget.height;
				renderTarget.depthTexture.needsUpdate = true;
  
			}
  
			setTexture2D( renderTarget.depthTexture, 0 );
  
			var webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;
  
			if ( renderTarget.depthTexture.format === DepthFormat ) {
  
				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0 );
  
			} else if ( renderTarget.depthTexture.format === DepthStencilFormat ) {
  
				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0 );
  
			} else {
  
				throw new Error( 'Unknown depthTexture format' );
  
			}
  
		}
  
		// Setup GL resources for a non-texture depth buffer
		function setupDepthRenderbuffer( renderTarget ) {
  
			var renderTargetProperties = properties.get( renderTarget );
  
			var isCube = ( renderTarget.isWebGLRenderTargetCube === true );
  
			if ( renderTarget.depthTexture ) {
  
				if ( isCube ) throw new Error( 'target.depthTexture not supported in Cube render targets' );
  
				setupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );
  
			} else {
  
				if ( isCube ) {
  
					renderTargetProperties.__webglDepthbuffer = [];
  
					for ( var i = 0; i < 6; i ++ ) {
  
						_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer[ i ] );
						renderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();
						setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget );
  
					}
  
				} else {
  
					_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer );
					renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
					setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget );
  
				}
  
			}
  
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );
  
		}
  
		// Set up GL resources for the render target
		function setupRenderTarget( renderTarget ) {
  
			var renderTargetProperties = properties.get( renderTarget );
			var textureProperties = properties.get( renderTarget.texture );
  
			renderTarget.addEventListener( 'dispose', onRenderTargetDispose );
  
			textureProperties.__webglTexture = _gl.createTexture();
  
			info.memory.textures ++;
  
			var isCube = ( renderTarget.isWebGLRenderTargetCube === true );
			var isTargetPowerOfTwo = isPowerOfTwo( renderTarget );
  
			// Setup framebuffer
  
			if ( isCube ) {
  
				renderTargetProperties.__webglFramebuffer = [];
  
				for ( var i = 0; i < 6; i ++ ) {
  
					renderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();
  
				}
  
			} else {
  
				renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();
  
			}
  
			// Setup color buffer
  
			if ( isCube ) {
  
				state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture );
				setTextureParameters( _gl.TEXTURE_CUBE_MAP, renderTarget.texture, isTargetPowerOfTwo );
  
				for ( var i = 0; i < 6; i ++ ) {
  
					setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i ], renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i );
  
				}
  
				if ( textureNeedsGenerateMipmaps( renderTarget.texture, isTargetPowerOfTwo ) ) {
  
					generateMipmap( _gl.TEXTURE_CUBE_MAP, renderTarget.texture, renderTarget.width, renderTarget.height );
  
				}
  
				state.bindTexture( _gl.TEXTURE_CUBE_MAP, null );
  
			} else {
  
				state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );
				setTextureParameters( _gl.TEXTURE_2D, renderTarget.texture, isTargetPowerOfTwo );
				setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D );
  
				if ( textureNeedsGenerateMipmaps( renderTarget.texture, isTargetPowerOfTwo ) ) {
  
					generateMipmap( _gl.TEXTURE_2D, renderTarget.texture, renderTarget.width, renderTarget.height );
  
				}
  
				state.bindTexture( _gl.TEXTURE_2D, null );
  
			}
  
			// Setup depth and stencil buffers
  
			if ( renderTarget.depthBuffer ) {
  
				setupDepthRenderbuffer( renderTarget );
  
			}
  
		}
  
		function updateRenderTargetMipmap( renderTarget ) {
  
			var texture = renderTarget.texture;
			var isTargetPowerOfTwo = isPowerOfTwo( renderTarget );
  
			if ( textureNeedsGenerateMipmaps( texture, isTargetPowerOfTwo ) ) {
  
				var target = renderTarget.isWebGLRenderTargetCube ? _gl.TEXTURE_CUBE_MAP : _gl.TEXTURE_2D;
				var webglTexture = properties.get( texture ).__webglTexture;
  
				state.bindTexture( target, webglTexture );
				generateMipmap( target, texture, renderTarget.width, renderTarget.height );
				state.bindTexture( target, null );
  
			}
  
		}
  
		function updateVideoTexture( texture ) {
  
			var id = texture.id;
			var frame = info.render.frame;
  
			// Check the last frame we updated the VideoTexture
  
			if ( _videoTextures[ id ] !== frame ) {
  
				_videoTextures[ id ] = frame;
				texture.update();
  
			}
  
		}
  
		this.setTexture2D = setTexture2D;
		this.setTextureCube = setTextureCube;
		this.setTextureCubeDynamic = setTextureCubeDynamic;
		this.setupRenderTarget = setupRenderTarget;
		this.updateRenderTargetMipmap = updateRenderTargetMipmap;
  
	}
  
	/**
	 * @author thespite / http://www.twitter.com/thespite
	 */
  
	function WebGLUtils( gl, extensions ) {
  
		function convert( p ) {
  
			var extension;
  
			if ( p === RepeatWrapping ) return gl.REPEAT;
			if ( p === ClampToEdgeWrapping ) return gl.CLAMP_TO_EDGE;
			if ( p === MirroredRepeatWrapping ) return gl.MIRRORED_REPEAT;
  
			if ( p === NearestFilter ) return gl.NEAREST;
			if ( p === NearestMipMapNearestFilter ) return gl.NEAREST_MIPMAP_NEAREST;
			if ( p === NearestMipMapLinearFilter ) return gl.NEAREST_MIPMAP_LINEAR;
  
			if ( p === LinearFilter ) return gl.LINEAR;
			if ( p === LinearMipMapNearestFilter ) return gl.LINEAR_MIPMAP_NEAREST;
			if ( p === LinearMipMapLinearFilter ) return gl.LINEAR_MIPMAP_LINEAR;
  
			if ( p === UnsignedByteType ) return gl.UNSIGNED_BYTE;
			if ( p === UnsignedShort4444Type ) return gl.UNSIGNED_SHORT_4_4_4_4;
			if ( p === UnsignedShort5551Type ) return gl.UNSIGNED_SHORT_5_5_5_1;
			if ( p === UnsignedShort565Type ) return gl.UNSIGNED_SHORT_5_6_5;
  
			if ( p === ByteType ) return gl.BYTE;
			if ( p === ShortType ) return gl.SHORT;
			if ( p === UnsignedShortType ) return gl.UNSIGNED_SHORT;
			if ( p === IntType ) return gl.INT;
			if ( p === UnsignedIntType ) return gl.UNSIGNED_INT;
			if ( p === FloatType ) return gl.FLOAT;
  
			if ( p === HalfFloatType ) {
  
				extension = extensions.get( 'OES_texture_half_float' );
  
				if ( extension !== null ) return extension.HALF_FLOAT_OES;
  
			}
  
			if ( p === AlphaFormat ) return gl.ALPHA;
			if ( p === RGBFormat ) return gl.RGB;
			if ( p === RGBAFormat ) return gl.RGBA;
			if ( p === LuminanceFormat ) return gl.LUMINANCE;
			if ( p === LuminanceAlphaFormat ) return gl.LUMINANCE_ALPHA;
			if ( p === DepthFormat ) return gl.DEPTH_COMPONENT;
			if ( p === DepthStencilFormat ) return gl.DEPTH_STENCIL;
  
			if ( p === AddEquation ) return gl.FUNC_ADD;
			if ( p === SubtractEquation ) return gl.FUNC_SUBTRACT;
			if ( p === ReverseSubtractEquation ) return gl.FUNC_REVERSE_SUBTRACT;
  
			if ( p === ZeroFactor ) return gl.ZERO;
			if ( p === OneFactor ) return gl.ONE;
			if ( p === SrcColorFactor ) return gl.SRC_COLOR;
			if ( p === OneMinusSrcColorFactor ) return gl.ONE_MINUS_SRC_COLOR;
			if ( p === SrcAlphaFactor ) return gl.SRC_ALPHA;
			if ( p === OneMinusSrcAlphaFactor ) return gl.ONE_MINUS_SRC_ALPHA;
			if ( p === DstAlphaFactor ) return gl.DST_ALPHA;
			if ( p === OneMinusDstAlphaFactor ) return gl.ONE_MINUS_DST_ALPHA;
  
			if ( p === DstColorFactor ) return gl.DST_COLOR;
			if ( p === OneMinusDstColorFactor ) return gl.ONE_MINUS_DST_COLOR;
			if ( p === SrcAlphaSaturateFactor ) return gl.SRC_ALPHA_SATURATE;
  
			if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format ||
				p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {
  
				extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );
  
				if ( extension !== null ) {
  
					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
  
				}
  
			}
  
			if ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format ||
				p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {
  
				extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );
  
				if ( extension !== null ) {
  
					if ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
					if ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
					if ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
					if ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
  
				}
  
			}
  
			if ( p === RGB_ETC1_Format ) {
  
				extension = extensions.get( 'WEBGL_compressed_texture_etc1' );
  
				if ( extension !== null ) return extension.COMPRESSED_RGB_ETC1_WEBGL;
  
			}
  
			if ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||
				p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||
				p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||
				p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||
				p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ) {
  
				extension = extensions.get( 'WEBGL_compressed_texture_astc' );
  
				if ( extension !== null ) {
  
					return p;
  
				}
  
			}
  
			if ( p === MinEquation || p === MaxEquation ) {
  
				extension = extensions.get( 'EXT_blend_minmax' );
  
				if ( extension !== null ) {
  
					if ( p === MinEquation ) return extension.MIN_EXT;
					if ( p === MaxEquation ) return extension.MAX_EXT;
  
				}
  
			}
  
			if ( p === UnsignedInt248Type ) {
  
				extension = extensions.get( 'WEBGL_depth_texture' );
  
				if ( extension !== null ) return extension.UNSIGNED_INT_24_8_WEBGL;
  
			}
  
			return 0;
  
		}
  
		return { convert: convert };
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author greggman / http://games.greggman.com/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author tschw
	 */
  
	function PerspectiveCamera( fov, aspect, near, far ) {
  
		Camera.call( this );
  
		this.type = 'PerspectiveCamera';
  
		this.fov = fov !== undefined ? fov : 50;
		this.zoom = 1;
  
		this.near = near !== undefined ? near : 0.1;
		this.far = far !== undefined ? far : 2000;
		this.focus = 10;
  
		this.aspect = aspect !== undefined ? aspect : 1;
		this.view = null;
  
		this.filmGauge = 35;	// width of the film (default in millimeters)
		this.filmOffset = 0;	// horizontal film offset (same unit as gauge)
  
		this.updateProjectionMatrix();
  
	}
  
	PerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {
  
		constructor: PerspectiveCamera,
  
		isPerspectiveCamera: true,
  
		copy: function ( source, recursive ) {
  
			Camera.prototype.copy.call( this, source, recursive );
  
			this.fov = source.fov;
			this.zoom = source.zoom;
  
			this.near = source.near;
			this.far = source.far;
			this.focus = source.focus;
  
			this.aspect = source.aspect;
			this.view = source.view === null ? null : Object.assign( {}, source.view );
  
			this.filmGauge = source.filmGauge;
			this.filmOffset = source.filmOffset;
  
			return this;
  
		},
  
		/**
		 * Sets the FOV by focal length in respect to the current .filmGauge.
		 *
		 * The default film gauge is 35, so that the focal length can be specified for
		 * a 35mm (full frame) camera.
		 *
		 * Values for focal length and film gauge must have the same unit.
		 */
		setFocalLength: function ( focalLength ) {
  
			// see http://www.bobatkins.com/photography/technical/field_of_view.html
			var vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;
  
			this.fov = _Math.RAD2DEG * 2 * Math.atan( vExtentSlope );
			this.updateProjectionMatrix();
  
		},
  
		/**
		 * Calculates the focal length from the current .fov and .filmGauge.
		 */
		getFocalLength: function () {
  
			var vExtentSlope = Math.tan( _Math.DEG2RAD * 0.5 * this.fov );
  
			return 0.5 * this.getFilmHeight() / vExtentSlope;
  
		},
  
		getEffectiveFOV: function () {
  
			return _Math.RAD2DEG * 2 * Math.atan(
				Math.tan( _Math.DEG2RAD * 0.5 * this.fov ) / this.zoom );
  
		},
  
		getFilmWidth: function () {
  
			// film not completely covered in portrait format (aspect < 1)
			return this.filmGauge * Math.min( this.aspect, 1 );
  
		},
  
		getFilmHeight: function () {
  
			// film not completely covered in landscape format (aspect > 1)
			return this.filmGauge / Math.max( this.aspect, 1 );
  
		},
  
		/**
		 * Sets an offset in a larger frustum. This is useful for multi-window or
		 * multi-monitor/multi-machine setups.
		 *
		 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
		 * the monitors are in grid like this
		 *
		 *   +---+---+---+
		 *   | A | B | C |
		 *   +---+---+---+
		 *   | D | E | F |
		 *   +---+---+---+
		 *
		 * then for each monitor you would call it like this
		 *
		 *   var w = 1920;
		 *   var h = 1080;
		 *   var fullWidth = w * 3;
		 *   var fullHeight = h * 2;
		 *
		 *   --A--
		 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
		 *   --B--
		 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
		 *   --C--
		 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
		 *   --D--
		 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
		 *   --E--
		 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
		 *   --F--
		 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
		 *
		 *   Note there is no reason monitors have to be the same size or in a grid.
		 */
		setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {
  
			this.aspect = fullWidth / fullHeight;
  
			if ( this.view === null ) {
  
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
  
			}
  
			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
  
			this.updateProjectionMatrix();
  
		},
  
		clearViewOffset: function () {
  
			if ( this.view !== null ) {
  
				this.view.enabled = false;
  
			}
  
			this.updateProjectionMatrix();
  
		},
  
		updateProjectionMatrix: function () {
  
			var near = this.near,
				top = near * Math.tan(
					_Math.DEG2RAD * 0.5 * this.fov ) / this.zoom,
				height = 2 * top,
				width = this.aspect * height,
				left = - 0.5 * width,
				view = this.view;
  
			if ( this.view !== null && this.view.enabled ) {
  
				var fullWidth = view.fullWidth,
					fullHeight = view.fullHeight;
  
				left += view.offsetX * width / fullWidth;
				top -= view.offsetY * height / fullHeight;
				width *= view.width / fullWidth;
				height *= view.height / fullHeight;
  
			}
  
			var skew = this.filmOffset;
			if ( skew !== 0 ) left += near * skew / this.getFilmWidth();
  
			this.projectionMatrix.makePerspective( left, left + width, top, top - height, near, this.far );
  
		},
  
		toJSON: function ( meta ) {
  
			var data = Object3D.prototype.toJSON.call( this, meta );
  
			data.object.fov = this.fov;
			data.object.zoom = this.zoom;
  
			data.object.near = this.near;
			data.object.far = this.far;
			data.object.focus = this.focus;
  
			data.object.aspect = this.aspect;
  
			if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );
  
			data.object.filmGauge = this.filmGauge;
			data.object.filmOffset = this.filmOffset;
  
			return data;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function ArrayCamera( array ) {
  
		PerspectiveCamera.call( this );
  
		this.cameras = array || [];
  
	}
  
	ArrayCamera.prototype = Object.assign( Object.create( PerspectiveCamera.prototype ), {
  
		constructor: ArrayCamera,
  
		isArrayCamera: true
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebVRManager( renderer ) {
  
		var scope = this;
  
		var device = null;
		var frameData = null;
  
		var poseTarget = null;
  
		var standingMatrix = new Matrix4();
		var standingMatrixInverse = new Matrix4();
  
		if ( typeof window !== 'undefined' && 'VRFrameData' in window ) {
  
			frameData = new window.VRFrameData();
			window.addEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );
  
		}
  
		var matrixWorldInverse = new Matrix4();
		var tempQuaternion = new Quaternion();
		var tempPosition = new Vector3();
  
		var cameraL = new PerspectiveCamera();
		cameraL.bounds = new Vector4( 0.0, 0.0, 0.5, 1.0 );
		cameraL.layers.enable( 1 );
  
		var cameraR = new PerspectiveCamera();
		cameraR.bounds = new Vector4( 0.5, 0.0, 0.5, 1.0 );
		cameraR.layers.enable( 2 );
  
		var cameraVR = new ArrayCamera( [ cameraL, cameraR ] );
		cameraVR.layers.enable( 1 );
		cameraVR.layers.enable( 2 );
  
		//
  
		function isPresenting() {
  
			return device !== null && device.isPresenting === true;
  
		}
  
		var currentSize, currentPixelRatio;
  
		function onVRDisplayPresentChange() {
  
			if ( isPresenting() ) {
  
				var eyeParameters = device.getEyeParameters( 'left' );
				var renderWidth = eyeParameters.renderWidth;
				var renderHeight = eyeParameters.renderHeight;
  
				currentPixelRatio = renderer.getPixelRatio();
				currentSize = renderer.getSize();
  
				renderer.setDrawingBufferSize( renderWidth * 2, renderHeight, 1 );
  
				animation.start();
  
			} else if ( scope.enabled ) {
  
				renderer.setDrawingBufferSize( currentSize.width, currentSize.height, currentPixelRatio );
  
				animation.stop();
  
			}
  
		}
  
		//
  
		this.enabled = false;
		this.userHeight = 1.6;
  
		this.getDevice = function () {
  
			return device;
  
		};
  
		this.setDevice = function ( value ) {
  
			if ( value !== undefined ) device = value;
  
			animation.setContext( value );
  
		};
  
		this.setPoseTarget = function ( object ) {
  
			if ( object !== undefined ) poseTarget = object;
  
		};
  
		this.getCamera = function ( camera ) {
  
			if ( device === null ) return camera;
  
			device.depthNear = camera.near;
			device.depthFar = camera.far;
  
			device.getFrameData( frameData );
  
			//
  
			var stageParameters = device.stageParameters;
  
			if ( stageParameters ) {
  
				standingMatrix.fromArray( stageParameters.sittingToStandingTransform );
  
			} else {
  
				standingMatrix.makeTranslation( 0, scope.userHeight, 0 );
  
			}
  
  
			var pose = frameData.pose;
			var poseObject = poseTarget !== null ? poseTarget : camera;
  
			// We want to manipulate poseObject by its position and quaternion components since users may rely on them.
			poseObject.matrix.copy( standingMatrix );
			poseObject.matrix.decompose( poseObject.position, poseObject.quaternion, poseObject.scale );
  
			if ( pose.orientation !== null ) {
  
				tempQuaternion.fromArray( pose.orientation );
				poseObject.quaternion.multiply( tempQuaternion );
  
			}
  
			if ( pose.position !== null ) {
  
				tempQuaternion.setFromRotationMatrix( standingMatrix );
				tempPosition.fromArray( pose.position );
				tempPosition.applyQuaternion( tempQuaternion );
				poseObject.position.add( tempPosition );
  
			}
  
			poseObject.updateMatrixWorld();
  
			if ( device.isPresenting === false ) return camera;
  
			//
  
			cameraL.near = camera.near;
			cameraR.near = camera.near;
  
			cameraL.far = camera.far;
			cameraR.far = camera.far;
  
			cameraVR.matrixWorld.copy( camera.matrixWorld );
			cameraVR.matrixWorldInverse.copy( camera.matrixWorldInverse );
  
			cameraL.matrixWorldInverse.fromArray( frameData.leftViewMatrix );
			cameraR.matrixWorldInverse.fromArray( frameData.rightViewMatrix );
  
			// TODO (mrdoob) Double check this code
  
			standingMatrixInverse.getInverse( standingMatrix );
  
			cameraL.matrixWorldInverse.multiply( standingMatrixInverse );
			cameraR.matrixWorldInverse.multiply( standingMatrixInverse );
  
			var parent = poseObject.parent;
  
			if ( parent !== null ) {
  
				matrixWorldInverse.getInverse( parent.matrixWorld );
  
				cameraL.matrixWorldInverse.multiply( matrixWorldInverse );
				cameraR.matrixWorldInverse.multiply( matrixWorldInverse );
  
			}
  
			// envMap and Mirror needs camera.matrixWorld
  
			cameraL.matrixWorld.getInverse( cameraL.matrixWorldInverse );
			cameraR.matrixWorld.getInverse( cameraR.matrixWorldInverse );
  
			cameraL.projectionMatrix.fromArray( frameData.leftProjectionMatrix );
			cameraR.projectionMatrix.fromArray( frameData.rightProjectionMatrix );
  
			// HACK (mrdoob)
			// https://github.com/w3c/webvr/issues/203
  
			cameraVR.projectionMatrix.copy( cameraL.projectionMatrix );
  
			//
  
			var layers = device.getLayers();
  
			if ( layers.length ) {
  
				var layer = layers[ 0 ];
  
				if ( layer.leftBounds !== null && layer.leftBounds.length === 4 ) {
  
					cameraL.bounds.fromArray( layer.leftBounds );
  
				}
  
				if ( layer.rightBounds !== null && layer.rightBounds.length === 4 ) {
  
					cameraR.bounds.fromArray( layer.rightBounds );
  
				}
  
			}
  
			return cameraVR;
  
		};
  
		this.getStandingMatrix = function () {
  
			return standingMatrix;
  
		};
  
		this.isPresenting = isPresenting;
  
		// Animation Loop
  
		var animation = new WebGLAnimation();
  
		this.setAnimationLoop = function ( callback ) {
  
			animation.setAnimationLoop( callback );
  
		};
  
		this.submitFrame = function () {
  
			if ( isPresenting() ) device.submitFrame();
  
		};
  
		this.dispose = function () {
  
			if ( typeof window !== 'undefined' ) {
  
				window.removeEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange );
  
			}
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function WebXRManager( renderer ) {
  
		var gl = renderer.context;
  
		var device = null;
		var session = null;
  
		var frameOfRef = null;
  
		var pose = null;
  
		function isPresenting() {
  
			return session !== null && frameOfRef !== null;
  
		}
  
		//
  
		var cameraL = new PerspectiveCamera();
		cameraL.layers.enable( 1 );
		cameraL.viewport = new Vector4();
  
		var cameraR = new PerspectiveCamera();
		cameraR.layers.enable( 2 );
		cameraR.viewport = new Vector4();
  
		var cameraVR = new ArrayCamera( [ cameraL, cameraR ] );
		cameraVR.layers.enable( 1 );
		cameraVR.layers.enable( 2 );
  
		//
  
		this.enabled = false;
  
		this.getDevice = function () {
  
			return device;
  
		};
  
		this.setDevice = function ( value ) {
  
			if ( value !== undefined ) device = value;
  
			gl.setCompatibleXRDevice( value );
  
		};
  
		//
  
		this.setSession = function ( value, options ) {
  
			session = value;
  
			if ( session !== null ) {
  
				session.addEventListener( 'end', function () {
  
					renderer.setFramebuffer( null );
					animation.stop();
  
				} );
  
				session.baseLayer = new XRWebGLLayer( session, gl );
				session.requestFrameOfReference( options.frameOfReferenceType ).then( function ( value ) {
  
					frameOfRef = value;
  
					renderer.setFramebuffer( session.baseLayer.framebuffer );
  
					animation.setContext( session );
					animation.start();
  
				} );
  
			}
  
		};
  
		function updateCamera( camera, parent ) {
  
			if ( parent === null ) {
  
				camera.matrixWorld.copy( camera.matrix );
  
			} else {
  
				camera.matrixWorld.multiplyMatrices( parent.matrixWorld, camera.matrix );
  
			}
  
			camera.matrixWorldInverse.getInverse( camera.matrixWorld );
  
		}
  
		this.getCamera = function ( camera ) {
  
			if ( isPresenting() ) {
  
				var parent = camera.parent;
				var cameras = cameraVR.cameras;
  
				// apply camera.parent to cameraVR
  
				updateCamera( cameraVR, parent );
  
				for ( var i = 0; i < cameras.length; i ++ ) {
  
					updateCamera( cameras[ i ], parent );
  
				}
  
				// update camera and its children
  
				camera.matrixWorld.copy( cameraVR.matrixWorld );
  
				var children = camera.children;
  
				for ( var i = 0, l = children.length; i < l; i ++ ) {
  
					children[ i ].updateMatrixWorld( true );
  
				}
  
				return cameraVR;
  
			}
  
			return camera;
  
		};
  
		this.isPresenting = isPresenting;
  
		// Animation Loop
  
		var onAnimationFrameCallback = null;
  
		function onAnimationFrame( time, frame ) {
  
			pose = frame.getDevicePose( frameOfRef );
  
			var layer = session.baseLayer;
			var views = frame.views;
  
			for ( var i = 0; i < views.length; i ++ ) {
  
				var view = views[ i ];
				var viewport = layer.getViewport( view );
				var viewMatrix = pose.getViewMatrix( view );
  
				var camera = cameraVR.cameras[ i ];
				camera.matrix.fromArray( viewMatrix ).getInverse( camera.matrix );
				camera.projectionMatrix.fromArray( view.projectionMatrix );
				camera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );
  
				if ( i === 0 ) {
  
					cameraVR.matrix.copy( camera.matrix );
  
					// HACK (mrdoob)
					// https://github.com/w3c/webvr/issues/203
  
					cameraVR.projectionMatrix.copy( camera.projectionMatrix );
  
				}
  
			}
  
			if ( onAnimationFrameCallback ) onAnimationFrameCallback();
  
		}
  
		var animation = new WebGLAnimation();
		animation.setAnimationLoop( onAnimationFrame );
  
		this.setAnimationLoop = function ( callback ) {
  
			onAnimationFrameCallback = callback;
  
		};
  
		// DEPRECATED
  
		this.getStandingMatrix = function () {
  
			console.warn( 'THREE.WebXRManager: getStandingMatrix() is no longer needed.' );
			return new THREE.Matrix4();
  
		};
  
		this.submitFrame = function () {};
  
	}
  
	/**
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author szimek / https://github.com/szimek/
	 * @author tschw
	 */
  
	function WebGLRenderer( parameters ) {
  
		console.log( 'THREE.WebGLRenderer', REVISION );
  
		parameters = parameters || {};
  
		var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ),
			_context = parameters.context !== undefined ? parameters.context : null,
  
			_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
			_depth = parameters.depth !== undefined ? parameters.depth : true,
			_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
			_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
			_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
			_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,
			_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default';
  
		var currentRenderList = null;
		var currentRenderState = null;
  
		// public properties
  
		this.domElement = _canvas;
		this.context = null;
  
		// clearing
  
		this.autoClear = true;
		this.autoClearColor = true;
		this.autoClearDepth = true;
		this.autoClearStencil = true;
  
		// scene graph
  
		this.sortObjects = true;
  
		// user-defined clipping
  
		this.clippingPlanes = [];
		this.localClippingEnabled = false;
  
		// physically based shading
  
		this.gammaFactor = 2.0;	// for backwards compatibility
		this.gammaInput = false;
		this.gammaOutput = false;
  
		// physical lights
  
		this.physicallyCorrectLights = false;
  
		// tone mapping
  
		this.toneMapping = LinearToneMapping;
		this.toneMappingExposure = 1.0;
		this.toneMappingWhitePoint = 1.0;
  
		// morphs
  
		this.maxMorphTargets = 8;
		this.maxMorphNormals = 4;
  
		// internal properties
  
		var _this = this,
  
			_isContextLost = false,
  
			// internal state cache
  
			_framebuffer = null,
  
			_currentRenderTarget = null,
			_currentFramebuffer = null,
			_currentMaterialId = - 1,
			_currentGeometryProgram = '',
  
			_currentCamera = null,
			_currentArrayCamera = null,
  
			_currentViewport = new Vector4(),
			_currentScissor = new Vector4(),
			_currentScissorTest = null,
  
			//
  
			_usedTextureUnits = 0,
  
			//
  
			_width = _canvas.width,
			_height = _canvas.height,
  
			_pixelRatio = 1,
  
			_viewport = new Vector4( 0, 0, _width, _height ),
			_scissor = new Vector4( 0, 0, _width, _height ),
			_scissorTest = false,
  
			// frustum
  
			_frustum = new Frustum(),
  
			// clipping
  
			_clipping = new WebGLClipping(),
			_clippingEnabled = false,
			_localClippingEnabled = false,
  
			// camera matrices cache
  
			_projScreenMatrix = new Matrix4(),
  
			_vector3 = new Vector3();
  
		function getTargetPixelRatio() {
  
			return _currentRenderTarget === null ? _pixelRatio : 1;
  
		}
  
		// initialize
  
		var _gl;
  
		try {
  
			var contextAttributes = {
				alpha: _alpha,
				depth: _depth,
				stencil: _stencil,
				antialias: _antialias,
				premultipliedAlpha: _premultipliedAlpha,
				preserveDrawingBuffer: _preserveDrawingBuffer,
				powerPreference: _powerPreference
			};
  
			// event listeners must be registered before WebGL context is created, see #12753
  
			_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
			_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );
  
			_gl = _context || _canvas.getContext( 'webgl', contextAttributes ) || _canvas.getContext( 'experimental-webgl', contextAttributes );
  
			if ( _gl === null ) {
  
				if ( _canvas.getContext( 'webgl' ) !== null ) {
  
					throw new Error( 'Error creating WebGL context with your selected attributes.' );
  
				} else {
  
					throw new Error( 'Error creating WebGL context.' );
  
				}
  
			}
  
			// Some experimental-webgl implementations do not have getShaderPrecisionFormat
  
			if ( _gl.getShaderPrecisionFormat === undefined ) {
  
				_gl.getShaderPrecisionFormat = function () {
  
					return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };
  
				};
  
			}
  
		} catch ( error ) {
  
			console.error( 'THREE.WebGLRenderer: ' + error.message );
  
		}
  
		var extensions, capabilities, state, info;
		var properties, textures, attributes, geometries, objects;
		var programCache, renderLists, renderStates;
  
		var background, morphtargets, bufferRenderer, indexedBufferRenderer;
		var spriteRenderer;
  
		var utils;
  
		function initGLContext() {
  
			extensions = new WebGLExtensions( _gl );
			extensions.get( 'WEBGL_depth_texture' );
			extensions.get( 'OES_texture_float' );
			extensions.get( 'OES_texture_float_linear' );
			extensions.get( 'OES_texture_half_float' );
			extensions.get( 'OES_texture_half_float_linear' );
			extensions.get( 'OES_standard_derivatives' );
			extensions.get( 'OES_element_index_uint' );
			extensions.get( 'ANGLE_instanced_arrays' );
  
			utils = new WebGLUtils( _gl, extensions );
  
			capabilities = new WebGLCapabilities( _gl, extensions, parameters );
  
			state = new WebGLState( _gl, extensions, utils );
			state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
			state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );
  
			info = new WebGLInfo( _gl );
			properties = new WebGLProperties();
			textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );
			attributes = new WebGLAttributes( _gl );
			geometries = new WebGLGeometries( _gl, attributes, info );
			objects = new WebGLObjects( geometries, info );
			morphtargets = new WebGLMorphtargets( _gl );
			programCache = new WebGLPrograms( _this, extensions, capabilities );
			renderLists = new WebGLRenderLists();
			renderStates = new WebGLRenderStates();
  
			background = new WebGLBackground( _this, state, objects, _premultipliedAlpha );
  
			bufferRenderer = new WebGLBufferRenderer( _gl, extensions, info );
			indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info );
  
			spriteRenderer = new WebGLSpriteRenderer( _this, _gl, state, textures, capabilities );
  
			info.programs = programCache.programs;
  
			_this.context = _gl;
			_this.capabilities = capabilities;
			_this.extensions = extensions;
			_this.properties = properties;
			_this.renderLists = renderLists;
			_this.state = state;
			_this.info = info;
  
		}
  
		initGLContext();
  
		// vr
  
		var vr = ( 'xr' in navigator ) ? new WebXRManager( _this ) : new WebVRManager( _this );
  
		this.vr = vr;
  
		// shadow map
  
		var shadowMap = new WebGLShadowMap( _this, objects, capabilities.maxTextureSize );
  
		this.shadowMap = shadowMap;
  
		// API
  
		this.getContext = function () {
  
			return _gl;
  
		};
  
		this.getContextAttributes = function () {
  
			return _gl.getContextAttributes();
  
		};
  
		this.forceContextLoss = function () {
  
			var extension = extensions.get( 'WEBGL_lose_context' );
			if ( extension ) extension.loseContext();
  
		};
  
		this.forceContextRestore = function () {
  
			var extension = extensions.get( 'WEBGL_lose_context' );
			if ( extension ) extension.restoreContext();
  
		};
  
		this.getPixelRatio = function () {
  
			return _pixelRatio;
  
		};
  
		this.setPixelRatio = function ( value ) {
  
			if ( value === undefined ) return;
  
			_pixelRatio = value;
  
			this.setSize( _width, _height, false );
  
		};
  
		this.getSize = function () {
  
			return {
				width: _width,
				height: _height
			};
  
		};
  
		this.setSize = function ( width, height, updateStyle ) {
  
			if ( vr.isPresenting() ) {
  
				console.warn( 'THREE.WebGLRenderer: Can\'t change size while VR device is presenting.' );
				return;
  
			}
  
			_width = width;
			_height = height;
  
			_canvas.width = width * _pixelRatio;
			_canvas.height = height * _pixelRatio;
  
			if ( updateStyle !== false ) {
  
				_canvas.style.width = width + 'px';
				_canvas.style.height = height + 'px';
  
			}
  
			this.setViewport( 0, 0, width, height );
  
		};
  
		this.getDrawingBufferSize = function () {
  
			return {
				width: _width * _pixelRatio,
				height: _height * _pixelRatio
			};
  
		};
  
		this.setDrawingBufferSize = function ( width, height, pixelRatio ) {
  
			_width = width;
			_height = height;
  
			_pixelRatio = pixelRatio;
  
			_canvas.width = width * pixelRatio;
			_canvas.height = height * pixelRatio;
  
			this.setViewport( 0, 0, width, height );
  
		};
  
		this.getCurrentViewport = function () {
  
			return _currentViewport;
  
		};
  
		this.setViewport = function ( x, y, width, height ) {
  
			_viewport.set( x, _height - y - height, width, height );
			state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );
  
		};
  
		this.setScissor = function ( x, y, width, height ) {
  
			_scissor.set( x, _height - y - height, width, height );
			state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
  
		};
  
		this.setScissorTest = function ( boolean ) {
  
			state.setScissorTest( _scissorTest = boolean );
  
		};
  
		// Clearing
  
		this.getClearColor = function () {
  
			return background.getClearColor();
  
		};
  
		this.setClearColor = function () {
  
			background.setClearColor.apply( background, arguments );
  
		};
  
		this.getClearAlpha = function () {
  
			return background.getClearAlpha();
  
		};
  
		this.setClearAlpha = function () {
  
			background.setClearAlpha.apply( background, arguments );
  
		};
  
		this.clear = function ( color, depth, stencil ) {
  
			var bits = 0;
  
			if ( color === undefined || color ) bits |= _gl.COLOR_BUFFER_BIT;
			if ( depth === undefined || depth ) bits |= _gl.DEPTH_BUFFER_BIT;
			if ( stencil === undefined || stencil ) bits |= _gl.STENCIL_BUFFER_BIT;
  
			_gl.clear( bits );
  
		};
  
		this.clearColor = function () {
  
			this.clear( true, false, false );
  
		};
  
		this.clearDepth = function () {
  
			this.clear( false, true, false );
  
		};
  
		this.clearStencil = function () {
  
			this.clear( false, false, true );
  
		};
  
		this.clearTarget = function ( renderTarget, color, depth, stencil ) {
  
			this.setRenderTarget( renderTarget );
			this.clear( color, depth, stencil );
  
		};
  
		//
  
		this.dispose = function () {
  
			_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
			_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );
  
			renderLists.dispose();
			renderStates.dispose();
			properties.dispose();
			objects.dispose();
  
			vr.dispose();
  
			animation.stop();
  
		};
  
		// Events
  
		function onContextLost( event ) {
  
			event.preventDefault();
  
			console.log( 'THREE.WebGLRenderer: Context Lost.' );
  
			_isContextLost = true;
  
		}
  
		function onContextRestore( /* event */ ) {
  
			console.log( 'THREE.WebGLRenderer: Context Restored.' );
  
			_isContextLost = false;
  
			initGLContext();
  
		}
  
		function onMaterialDispose( event ) {
  
			var material = event.target;
  
			material.removeEventListener( 'dispose', onMaterialDispose );
  
			deallocateMaterial( material );
  
		}
  
		// Buffer deallocation
  
		function deallocateMaterial( material ) {
  
			releaseMaterialProgramReference( material );
  
			properties.remove( material );
  
		}
  
  
		function releaseMaterialProgramReference( material ) {
  
			var programInfo = properties.get( material ).program;
  
			material.program = undefined;
  
			if ( programInfo !== undefined ) {
  
				programCache.releaseProgram( programInfo );
  
			}
  
		}
  
		// Buffer rendering
  
		function renderObjectImmediate( object, program, material ) {
  
			object.render( function ( object ) {
  
				_this.renderBufferImmediate( object, program, material );
  
			} );
  
		}
  
		this.renderBufferImmediate = function ( object, program, material ) {
  
			state.initAttributes();
  
			var buffers = properties.get( object );
  
			if ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();
			if ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();
			if ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();
			if ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();
  
			var programAttributes = program.getAttributes();
  
			if ( object.hasPositions ) {
  
				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.position );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW );
  
				state.enableAttribute( programAttributes.position );
				_gl.vertexAttribPointer( programAttributes.position, 3, _gl.FLOAT, false, 0, 0 );
  
			}
  
			if ( object.hasNormals ) {
  
				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.normal );
  
				if ( ! material.isMeshPhongMaterial &&
					! material.isMeshStandardMaterial &&
					! material.isMeshNormalMaterial &&
					material.flatShading === true ) {
  
					for ( var i = 0, l = object.count * 3; i < l; i += 9 ) {
  
						var array = object.normalArray;
  
						var nx = ( array[ i + 0 ] + array[ i + 3 ] + array[ i + 6 ] ) / 3;
						var ny = ( array[ i + 1 ] + array[ i + 4 ] + array[ i + 7 ] ) / 3;
						var nz = ( array[ i + 2 ] + array[ i + 5 ] + array[ i + 8 ] ) / 3;
  
						array[ i + 0 ] = nx;
						array[ i + 1 ] = ny;
						array[ i + 2 ] = nz;
  
						array[ i + 3 ] = nx;
						array[ i + 4 ] = ny;
						array[ i + 5 ] = nz;
  
						array[ i + 6 ] = nx;
						array[ i + 7 ] = ny;
						array[ i + 8 ] = nz;
  
					}
  
				}
  
				_gl.bufferData( _gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW );
  
				state.enableAttribute( programAttributes.normal );
  
				_gl.vertexAttribPointer( programAttributes.normal, 3, _gl.FLOAT, false, 0, 0 );
  
			}
  
			if ( object.hasUvs && material.map ) {
  
				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.uv );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW );
  
				state.enableAttribute( programAttributes.uv );
  
				_gl.vertexAttribPointer( programAttributes.uv, 2, _gl.FLOAT, false, 0, 0 );
  
			}
  
			if ( object.hasColors && material.vertexColors !== NoColors ) {
  
				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.color );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW );
  
				state.enableAttribute( programAttributes.color );
  
				_gl.vertexAttribPointer( programAttributes.color, 3, _gl.FLOAT, false, 0, 0 );
  
			}
  
			state.disableUnusedAttributes();
  
			_gl.drawArrays( _gl.TRIANGLES, 0, object.count );
  
			object.count = 0;
  
		};
  
		this.renderBufferDirect = function ( camera, fog, geometry, material, object, group ) {
  
			var frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );
  
			state.setMaterial( material, frontFaceCW );
  
			var program = setProgram( camera, fog, material, object );
			var geometryProgram = geometry.id + '_' + program.id + '_' + ( material.wireframe === true );
  
			var updateBuffers = false;
  
			if ( geometryProgram !== _currentGeometryProgram ) {
  
				_currentGeometryProgram = geometryProgram;
				updateBuffers = true;
  
			}
  
			if ( object.morphTargetInfluences ) {
  
				morphtargets.update( object, geometry, material, program );
  
				updateBuffers = true;
  
			}
  
			//
  
			var index = geometry.index;
			var position = geometry.attributes.position;
			var rangeFactor = 1;
  
			if ( material.wireframe === true ) {
  
				index = geometries.getWireframeAttribute( geometry );
				rangeFactor = 2;
  
			}
  
			var attribute;
			var renderer = bufferRenderer;
  
			if ( index !== null ) {
  
				attribute = attributes.get( index );
  
				renderer = indexedBufferRenderer;
				renderer.setIndex( attribute );
  
			}
  
			if ( updateBuffers ) {
  
				setupVertexAttributes( material, program, geometry );
  
				if ( index !== null ) {
  
					_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, attribute.buffer );
  
				}
  
			}
  
			//
  
			var dataCount = Infinity;
  
			if ( index !== null ) {
  
				dataCount = index.count;
  
			} else if ( position !== undefined ) {
  
				dataCount = position.count;
  
			}
  
			var rangeStart = geometry.drawRange.start * rangeFactor;
			var rangeCount = geometry.drawRange.count * rangeFactor;
  
			var groupStart = group !== null ? group.start * rangeFactor : 0;
			var groupCount = group !== null ? group.count * rangeFactor : Infinity;
  
			var drawStart = Math.max( rangeStart, groupStart );
			var drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;
  
			var drawCount = Math.max( 0, drawEnd - drawStart + 1 );
  
			if ( drawCount === 0 ) return;
  
			//
  
			if ( object.isMesh ) {
  
				if ( material.wireframe === true ) {
  
					state.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );
					renderer.setMode( _gl.LINES );
  
				} else {
  
					switch ( object.drawMode ) {
  
						case TrianglesDrawMode:
							renderer.setMode( _gl.TRIANGLES );
							break;
  
						case TriangleStripDrawMode:
							renderer.setMode( _gl.TRIANGLE_STRIP );
							break;
  
						case TriangleFanDrawMode:
							renderer.setMode( _gl.TRIANGLE_FAN );
							break;
  
					}
  
				}
  
  
			} else if ( object.isLine ) {
  
				var lineWidth = material.linewidth;
  
				if ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material
  
				state.setLineWidth( lineWidth * getTargetPixelRatio() );
  
				if ( object.isLineSegments ) {
  
					renderer.setMode( _gl.LINES );
  
				} else if ( object.isLineLoop ) {
  
					renderer.setMode( _gl.LINE_LOOP );
  
				} else {
  
					renderer.setMode( _gl.LINE_STRIP );
  
				}
  
			} else if ( object.isPoints ) {
  
				renderer.setMode( _gl.POINTS );
  
			}
  
			if ( geometry && geometry.isInstancedBufferGeometry ) {
  
				if ( geometry.maxInstancedCount > 0 ) {
  
					renderer.renderInstances( geometry, drawStart, drawCount );
  
				}
  
			} else {
  
				renderer.render( drawStart, drawCount );
  
			}
  
		};
  
		function setupVertexAttributes( material, program, geometry ) {
  
			if ( geometry && geometry.isInstancedBufferGeometry ) {
  
				if ( extensions.get( 'ANGLE_instanced_arrays' ) === null ) {
  
					console.error( 'THREE.WebGLRenderer.setupVertexAttributes: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
					return;
  
				}
  
			}
  
			state.initAttributes();
  
			var geometryAttributes = geometry.attributes;
  
			var programAttributes = program.getAttributes();
  
			var materialDefaultAttributeValues = material.defaultAttributeValues;
  
			for ( var name in programAttributes ) {
  
				var programAttribute = programAttributes[ name ];
  
				if ( programAttribute >= 0 ) {
  
					var geometryAttribute = geometryAttributes[ name ];
  
					if ( geometryAttribute !== undefined ) {
  
						var normalized = geometryAttribute.normalized;
						var size = geometryAttribute.itemSize;
  
						var attribute = attributes.get( geometryAttribute );
  
						// TODO Attribute may not be available on context restore
  
						if ( attribute === undefined ) continue;
  
						var buffer = attribute.buffer;
						var type = attribute.type;
						var bytesPerElement = attribute.bytesPerElement;
  
						if ( geometryAttribute.isInterleavedBufferAttribute ) {
  
							var data = geometryAttribute.data;
							var stride = data.stride;
							var offset = geometryAttribute.offset;
  
							if ( data && data.isInstancedInterleavedBuffer ) {
  
								state.enableAttributeAndDivisor( programAttribute, data.meshPerAttribute );
  
								if ( geometry.maxInstancedCount === undefined ) {
  
									geometry.maxInstancedCount = data.meshPerAttribute * data.count;
  
								}
  
							} else {
  
								state.enableAttribute( programAttribute );
  
							}
  
							_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
							_gl.vertexAttribPointer( programAttribute, size, type, normalized, stride * bytesPerElement, offset * bytesPerElement );
  
						} else {
  
							if ( geometryAttribute.isInstancedBufferAttribute ) {
  
								state.enableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute );
  
								if ( geometry.maxInstancedCount === undefined ) {
  
									geometry.maxInstancedCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;
  
								}
  
							} else {
  
								state.enableAttribute( programAttribute );
  
							}
  
							_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
							_gl.vertexAttribPointer( programAttribute, size, type, normalized, 0, 0 );
  
						}
  
					} else if ( materialDefaultAttributeValues !== undefined ) {
  
						var value = materialDefaultAttributeValues[ name ];
  
						if ( value !== undefined ) {
  
							switch ( value.length ) {
  
								case 2:
									_gl.vertexAttrib2fv( programAttribute, value );
									break;
  
								case 3:
									_gl.vertexAttrib3fv( programAttribute, value );
									break;
  
								case 4:
									_gl.vertexAttrib4fv( programAttribute, value );
									break;
  
								default:
									_gl.vertexAttrib1fv( programAttribute, value );
  
							}
  
						}
  
					}
  
				}
  
			}
  
			state.disableUnusedAttributes();
  
		}
  
		// Compile
  
		this.compile = function ( scene, camera ) {
  
			currentRenderState = renderStates.get( scene, camera );
			currentRenderState.init();
  
			scene.traverse( function ( object ) {
  
				if ( object.isLight ) {
  
					currentRenderState.pushLight( object );
  
					if ( object.castShadow ) {
  
						currentRenderState.pushShadow( object );
  
					}
  
				}
  
			} );
  
			currentRenderState.setupLights( camera );
  
			scene.traverse( function ( object ) {
  
				if ( object.material ) {
  
					if ( Array.isArray( object.material ) ) {
  
						for ( var i = 0; i < object.material.length; i ++ ) {
  
							initMaterial( object.material[ i ], scene.fog, object );
  
						}
  
					} else {
  
						initMaterial( object.material, scene.fog, object );
  
					}
  
				}
  
			} );
  
		};
  
		// Animation Loop
  
		var onAnimationFrameCallback = null;
  
		function onAnimationFrame() {
  
			if ( vr.isPresenting() ) return;
			if ( onAnimationFrameCallback ) onAnimationFrameCallback();
  
		}
  
		var animation = new WebGLAnimation();
		animation.setAnimationLoop( onAnimationFrame );
		animation.setContext( window );
  
		this.setAnimationLoop = function ( callback ) {
  
			onAnimationFrameCallback = callback;
			vr.setAnimationLoop( callback );
  
			animation.start();
  
		};
  
		// Rendering
  
		this.render = function ( scene, camera, renderTarget, forceClear ) {
  
			if ( ! ( camera && camera.isCamera ) ) {
  
				console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
				return;
  
			}
  
			if ( _isContextLost ) return;
  
			// reset caching for this frame
  
			_currentGeometryProgram = '';
			_currentMaterialId = - 1;
			_currentCamera = null;
  
			// update scene graph
  
			if ( scene.autoUpdate === true ) scene.updateMatrixWorld();
  
			// update camera matrices and frustum
  
			if ( camera.parent === null ) camera.updateMatrixWorld();
  
			if ( vr.enabled ) {
  
				camera = vr.getCamera( camera );
  
			}
  
			//
  
			currentRenderState = renderStates.get( scene, camera );
			currentRenderState.init();
  
			scene.onBeforeRender( _this, scene, camera, renderTarget );
  
			_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
			_frustum.setFromMatrix( _projScreenMatrix );
  
			_localClippingEnabled = this.localClippingEnabled;
			_clippingEnabled = _clipping.init( this.clippingPlanes, _localClippingEnabled, camera );
  
			currentRenderList = renderLists.get( scene, camera );
			currentRenderList.init();
  
			projectObject( scene, camera, _this.sortObjects );
  
			if ( _this.sortObjects === true ) {
  
				currentRenderList.sort();
  
			}
  
			//
  
			if ( _clippingEnabled ) _clipping.beginShadows();
  
			var shadowsArray = currentRenderState.state.shadowsArray;
  
			shadowMap.render( shadowsArray, scene, camera );
  
			currentRenderState.setupLights( camera );
  
			if ( _clippingEnabled ) _clipping.endShadows();
  
			//
  
			if ( this.info.autoReset ) this.info.reset();
  
			if ( renderTarget === undefined ) {
  
				renderTarget = null;
  
			}
  
			this.setRenderTarget( renderTarget );
  
			//
  
			background.render( currentRenderList, scene, camera, forceClear );
  
			// render scene
  
			var opaqueObjects = currentRenderList.opaque;
			var transparentObjects = currentRenderList.transparent;
  
			if ( scene.overrideMaterial ) {
  
				var overrideMaterial = scene.overrideMaterial;
  
				if ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera, overrideMaterial );
				if ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera, overrideMaterial );
  
			} else {
  
				// opaque pass (front-to-back order)
  
				if ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera );
  
				// transparent pass (back-to-front order)
  
				if ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera );
  
			}
  
			// custom renderers
  
			var spritesArray = currentRenderState.state.spritesArray;
  
			spriteRenderer.render( spritesArray, scene, camera );
  
			// Generate mipmap if we're using any kind of mipmap filtering
  
			if ( renderTarget ) {
  
				textures.updateRenderTargetMipmap( renderTarget );
  
			}
  
			// Ensure depth buffer writing is enabled so it can be cleared on next render
  
			state.buffers.depth.setTest( true );
			state.buffers.depth.setMask( true );
			state.buffers.color.setMask( true );
  
			state.setPolygonOffset( false );
  
			scene.onAfterRender( _this, scene, camera );
  
			if ( vr.enabled ) {
  
				vr.submitFrame();
  
			}
  
			// _gl.finish();
  
			currentRenderList = null;
			currentRenderState = null;
  
		};
  
		/*
		// TODO Duplicated code (Frustum)
  
		var _sphere = new Sphere();
  
		function isObjectViewable( object ) {
  
			var geometry = object.geometry;
  
			if ( geometry.boundingSphere === null )
				geometry.computeBoundingSphere();
  
			_sphere.copy( geometry.boundingSphere ).
			applyMatrix4( object.matrixWorld );
  
			return isSphereViewable( _sphere );
  
		}
  
		function isSpriteViewable( sprite ) {
  
			_sphere.center.set( 0, 0, 0 );
			_sphere.radius = 0.7071067811865476;
			_sphere.applyMatrix4( sprite.matrixWorld );
  
			return isSphereViewable( _sphere );
  
		}
  
		function isSphereViewable( sphere ) {
  
			if ( ! _frustum.intersectsSphere( sphere ) ) return false;
  
			var numPlanes = _clipping.numPlanes;
  
			if ( numPlanes === 0 ) return true;
  
			var planes = _this.clippingPlanes,
  
				center = sphere.center,
				negRad = - sphere.radius,
				i = 0;
  
			do {
  
				// out when deeper than radius in the negative halfspace
				if ( planes[ i ].distanceToPoint( center ) < negRad ) return false;
  
			} while ( ++ i !== numPlanes );
  
			return true;
  
		}
		*/
  
		function projectObject( object, camera, sortObjects ) {
  
			if ( object.visible === false ) return;
  
			var visible = object.layers.test( camera.layers );
  
			if ( visible ) {
  
				if ( object.isLight ) {
  
					currentRenderState.pushLight( object );
  
					if ( object.castShadow ) {
  
						currentRenderState.pushShadow( object );
  
					}
  
				} else if ( object.isSprite ) {
  
					if ( ! object.frustumCulled || _frustum.intersectsSprite( object ) ) {
  
						currentRenderState.pushSprite( object );
  
					}
  
				} else if ( object.isImmediateRenderObject ) {
  
					if ( sortObjects ) {
  
						_vector3.setFromMatrixPosition( object.matrixWorld )
							.applyMatrix4( _projScreenMatrix );
  
					}
  
					currentRenderList.push( object, null, object.material, _vector3.z, null );
  
				} else if ( object.isMesh || object.isLine || object.isPoints ) {
  
					if ( object.isSkinnedMesh ) {
  
						object.skeleton.update();
  
					}
  
					if ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) {
  
						if ( sortObjects ) {
  
							_vector3.setFromMatrixPosition( object.matrixWorld )
								.applyMatrix4( _projScreenMatrix );
  
						}
  
						var geometry = objects.update( object );
						var material = object.material;
  
						if ( Array.isArray( material ) ) {
  
							var groups = geometry.groups;
  
							for ( var i = 0, l = groups.length; i < l; i ++ ) {
  
								var group = groups[ i ];
								var groupMaterial = material[ group.materialIndex ];
  
								if ( groupMaterial && groupMaterial.visible ) {
  
									currentRenderList.push( object, geometry, groupMaterial, _vector3.z, group );
  
								}
  
							}
  
						} else if ( material.visible ) {
  
							currentRenderList.push( object, geometry, material, _vector3.z, null );
  
						}
  
					}
  
				}
  
			}
  
			var children = object.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				projectObject( children[ i ], camera, sortObjects );
  
			}
  
		}
  
		function renderObjects( renderList, scene, camera, overrideMaterial ) {
  
			for ( var i = 0, l = renderList.length; i < l; i ++ ) {
  
				var renderItem = renderList[ i ];
  
				var object = renderItem.object;
				var geometry = renderItem.geometry;
				var material = overrideMaterial === undefined ? renderItem.material : overrideMaterial;
				var group = renderItem.group;
  
				if ( camera.isArrayCamera ) {
  
					_currentArrayCamera = camera;
  
					var cameras = camera.cameras;
  
					for ( var j = 0, jl = cameras.length; j < jl; j ++ ) {
  
						var camera2 = cameras[ j ];
  
						if ( object.layers.test( camera2.layers ) ) {
  
							if ( 'viewport' in camera2 ) { // XR
  
								state.viewport( _currentViewport.copy( camera2.viewport ) );
  
							} else {
  
								var bounds = camera2.bounds;
  
								var x = bounds.x * _width;
								var y = bounds.y * _height;
								var width = bounds.z * _width;
								var height = bounds.w * _height;
  
								state.viewport( _currentViewport.set( x, y, width, height ).multiplyScalar( _pixelRatio ) );
  
							}
  
							renderObject( object, scene, camera2, geometry, material, group );
  
						}
  
					}
  
				} else {
  
					_currentArrayCamera = null;
  
					renderObject( object, scene, camera, geometry, material, group );
  
				}
  
			}
  
		}
  
		function renderObject( object, scene, camera, geometry, material, group ) {
  
			object.onBeforeRender( _this, scene, camera, geometry, material, group );
			currentRenderState = renderStates.get( scene, _currentArrayCamera || camera );
  
			object.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );
			object.normalMatrix.getNormalMatrix( object.modelViewMatrix );
  
			if ( object.isImmediateRenderObject ) {
  
				var frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );
  
				state.setMaterial( material, frontFaceCW );
  
				var program = setProgram( camera, scene.fog, material, object );
  
				_currentGeometryProgram = '';
  
				renderObjectImmediate( object, program, material );
  
			} else {
  
				_this.renderBufferDirect( camera, scene.fog, geometry, material, object, group );
  
			}
  
			object.onAfterRender( _this, scene, camera, geometry, material, group );
			currentRenderState = renderStates.get( scene, _currentArrayCamera || camera );
  
		}
  
		function initMaterial( material, fog, object ) {
  
			var materialProperties = properties.get( material );
  
			var lights = currentRenderState.state.lights;
			var shadowsArray = currentRenderState.state.shadowsArray;
  
			var parameters = programCache.getParameters(
				material, lights.state, shadowsArray, fog, _clipping.numPlanes, _clipping.numIntersection, object );
  
			var code = programCache.getProgramCode( material, parameters );
  
			var program = materialProperties.program;
			var programChange = true;
  
			if ( program === undefined ) {
  
				// new material
				material.addEventListener( 'dispose', onMaterialDispose );
  
			} else if ( program.code !== code ) {
  
				// changed glsl or parameters
				releaseMaterialProgramReference( material );
  
			} else if ( materialProperties.lightsHash !== lights.state.hash ) {
  
				properties.update( material, 'lightsHash', lights.state.hash );
				programChange = false;
  
			} else if ( parameters.shaderID !== undefined ) {
  
				// same glsl and uniform list
				return;
  
			} else {
  
				// only rebuild uniform list
				programChange = false;
  
			}
  
			if ( programChange ) {
  
				if ( parameters.shaderID ) {
  
					var shader = ShaderLib[ parameters.shaderID ];
  
					materialProperties.shader = {
						name: material.type,
						uniforms: UniformsUtils.clone( shader.uniforms ),
						vertexShader: shader.vertexShader,
						fragmentShader: shader.fragmentShader
					};
  
				} else {
  
					materialProperties.shader = {
						name: material.type,
						uniforms: material.uniforms,
						vertexShader: material.vertexShader,
						fragmentShader: material.fragmentShader
					};
  
				}
  
				material.onBeforeCompile( materialProperties.shader, _this );
  
				program = programCache.acquireProgram( material, materialProperties.shader, parameters, code );
  
				materialProperties.program = program;
				material.program = program;
  
			}
  
			var programAttributes = program.getAttributes();
  
			if ( material.morphTargets ) {
  
				material.numSupportedMorphTargets = 0;
  
				for ( var i = 0; i < _this.maxMorphTargets; i ++ ) {
  
					if ( programAttributes[ 'morphTarget' + i ] >= 0 ) {
  
						material.numSupportedMorphTargets ++;
  
					}
  
				}
  
			}
  
			if ( material.morphNormals ) {
  
				material.numSupportedMorphNormals = 0;
  
				for ( var i = 0; i < _this.maxMorphNormals; i ++ ) {
  
					if ( programAttributes[ 'morphNormal' + i ] >= 0 ) {
  
						material.numSupportedMorphNormals ++;
  
					}
  
				}
  
			}
  
			var uniforms = materialProperties.shader.uniforms;
  
			if ( ! material.isShaderMaterial &&
				! material.isRawShaderMaterial ||
				material.clipping === true ) {
  
				materialProperties.numClippingPlanes = _clipping.numPlanes;
				materialProperties.numIntersection = _clipping.numIntersection;
				uniforms.clippingPlanes = _clipping.uniform;
  
			}
  
			materialProperties.fog = fog;
  
			// store the light setup it was created for
  
			materialProperties.lightsHash = lights.state.hash;
  
			if ( material.lights ) {
  
				// wire up the material to this renderer's lighting state
  
				uniforms.ambientLightColor.value = lights.state.ambient;
				uniforms.directionalLights.value = lights.state.directional;
				uniforms.spotLights.value = lights.state.spot;
				uniforms.rectAreaLights.value = lights.state.rectArea;
				uniforms.pointLights.value = lights.state.point;
				uniforms.hemisphereLights.value = lights.state.hemi;
  
				uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
				uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
				uniforms.spotShadowMap.value = lights.state.spotShadowMap;
				uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
				uniforms.pointShadowMap.value = lights.state.pointShadowMap;
				uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;
				// TODO (abelnation): add area lights shadow info to uniforms
  
			}
  
			var progUniforms = materialProperties.program.getUniforms(),
				uniformsList =
					WebGLUniforms.seqWithValue( progUniforms.seq, uniforms );
  
			materialProperties.uniformsList = uniformsList;
  
		}
  
		function setProgram( camera, fog, material, object ) {
  
			_usedTextureUnits = 0;
  
			var materialProperties = properties.get( material );
			var lights = currentRenderState.state.lights;
  
			if ( _clippingEnabled ) {
  
				if ( _localClippingEnabled || camera !== _currentCamera ) {
  
					var useCache =
						camera === _currentCamera &&
						material.id === _currentMaterialId;
  
					// we might want to call this function with some ClippingGroup
					// object instead of the material, once it becomes feasible
					// (#8465, #8379)
					_clipping.setState(
						material.clippingPlanes, material.clipIntersection, material.clipShadows,
						camera, materialProperties, useCache );
  
				}
  
			}
  
			if ( material.needsUpdate === false ) {
  
				if ( materialProperties.program === undefined ) {
  
					material.needsUpdate = true;
  
				} else if ( material.fog && materialProperties.fog !== fog ) {
  
					material.needsUpdate = true;
  
				} else if ( material.lights && materialProperties.lightsHash !== lights.state.hash ) {
  
					material.needsUpdate = true;
  
				} else if ( materialProperties.numClippingPlanes !== undefined &&
					( materialProperties.numClippingPlanes !== _clipping.numPlanes ||
					materialProperties.numIntersection !== _clipping.numIntersection ) ) {
  
					material.needsUpdate = true;
  
				}
  
			}
  
			if ( material.needsUpdate ) {
  
				initMaterial( material, fog, object );
				material.needsUpdate = false;
  
			}
  
			var refreshProgram = false;
			var refreshMaterial = false;
			var refreshLights = false;
  
			var program = materialProperties.program,
				p_uniforms = program.getUniforms(),
				m_uniforms = materialProperties.shader.uniforms;
  
			if ( state.useProgram( program.program ) ) {
  
				refreshProgram = true;
				refreshMaterial = true;
				refreshLights = true;
  
			}
  
			if ( material.id !== _currentMaterialId ) {
  
				_currentMaterialId = material.id;
  
				refreshMaterial = true;
  
			}
  
			if ( refreshProgram || camera !== _currentCamera ) {
  
				p_uniforms.setValue( _gl, 'projectionMatrix', camera.projectionMatrix );
  
				if ( capabilities.logarithmicDepthBuffer ) {
  
					p_uniforms.setValue( _gl, 'logDepthBufFC',
						2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );
  
				}
  
				// Avoid unneeded uniform updates per ArrayCamera's sub-camera
  
				if ( _currentCamera !== ( _currentArrayCamera || camera ) ) {
  
					_currentCamera = ( _currentArrayCamera || camera );
  
					// lighting uniforms depend on the camera so enforce an update
					// now, in case this material supports lights - or later, when
					// the next material that does gets activated:
  
					refreshMaterial = true;		// set to true on material change
					refreshLights = true;		// remains set until update done
  
				}
  
				// load material specific uniforms
				// (shader material also gets them for the sake of genericity)
  
				if ( material.isShaderMaterial ||
					material.isMeshPhongMaterial ||
					material.isMeshStandardMaterial ||
					material.envMap ) {
  
					var uCamPos = p_uniforms.map.cameraPosition;
  
					if ( uCamPos !== undefined ) {
  
						uCamPos.setValue( _gl,
							_vector3.setFromMatrixPosition( camera.matrixWorld ) );
  
					}
  
				}
  
				if ( material.isMeshPhongMaterial ||
					material.isMeshLambertMaterial ||
					material.isMeshBasicMaterial ||
					material.isMeshStandardMaterial ||
					material.isShaderMaterial ||
					material.skinning ) {
  
					p_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );
  
				}
  
			}
  
			// skinning uniforms must be set even if material didn't change
			// auto-setting of texture unit for bone texture must go before other textures
			// not sure why, but otherwise weird things happen
  
			if ( material.skinning ) {
  
				p_uniforms.setOptional( _gl, object, 'bindMatrix' );
				p_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );
  
				var skeleton = object.skeleton;
  
				if ( skeleton ) {
  
					var bones = skeleton.bones;
  
					if ( capabilities.floatVertexTextures ) {
  
						if ( skeleton.boneTexture === undefined ) {
  
							// layout (1 matrix = 4 pixels)
							//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
							//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)
							//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)
							//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)
							//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)
  
  
							var size = Math.sqrt( bones.length * 4 ); // 4 pixels needed for 1 matrix
							size = _Math.ceilPowerOfTwo( size );
							size = Math.max( size, 4 );
  
							var boneMatrices = new Float32Array( size * size * 4 ); // 4 floats per RGBA pixel
							boneMatrices.set( skeleton.boneMatrices ); // copy current values
  
							var boneTexture = new DataTexture( boneMatrices, size, size, RGBAFormat, FloatType );
							boneTexture.needsUpdate = true;
  
							skeleton.boneMatrices = boneMatrices;
							skeleton.boneTexture = boneTexture;
							skeleton.boneTextureSize = size;
  
						}
  
						p_uniforms.setValue( _gl, 'boneTexture', skeleton.boneTexture );
						p_uniforms.setValue( _gl, 'boneTextureSize', skeleton.boneTextureSize );
  
					} else {
  
						p_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );
  
					}
  
				}
  
			}
  
			if ( refreshMaterial ) {
  
				p_uniforms.setValue( _gl, 'toneMappingExposure', _this.toneMappingExposure );
				p_uniforms.setValue( _gl, 'toneMappingWhitePoint', _this.toneMappingWhitePoint );
  
				if ( material.lights ) {
  
					// the current material requires lighting info
  
					// note: all lighting uniforms are always set correctly
					// they simply reference the renderer's state for their
					// values
					//
					// use the current material's .needsUpdate flags to set
					// the GL state when required
  
					markUniformsLightsNeedsUpdate( m_uniforms, refreshLights );
  
				}
  
				// refresh uniforms common to several materials
  
				if ( fog && material.fog ) {
  
					refreshUniformsFog( m_uniforms, fog );
  
				}
  
				if ( material.isMeshBasicMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
  
				} else if ( material.isMeshLambertMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsLambert( m_uniforms, material );
  
				} else if ( material.isMeshPhongMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
  
					if ( material.isMeshToonMaterial ) {
  
						refreshUniformsToon( m_uniforms, material );
  
					} else {
  
						refreshUniformsPhong( m_uniforms, material );
  
					}
  
				} else if ( material.isMeshStandardMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
  
					if ( material.isMeshPhysicalMaterial ) {
  
						refreshUniformsPhysical( m_uniforms, material );
  
					} else {
  
						refreshUniformsStandard( m_uniforms, material );
  
					}
  
				} else if ( material.isMeshDepthMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsDepth( m_uniforms, material );
  
				} else if ( material.isMeshDistanceMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsDistance( m_uniforms, material );
  
				} else if ( material.isMeshNormalMaterial ) {
  
					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsNormal( m_uniforms, material );
  
				} else if ( material.isLineBasicMaterial ) {
  
					refreshUniformsLine( m_uniforms, material );
  
					if ( material.isLineDashedMaterial ) {
  
						refreshUniformsDash( m_uniforms, material );
  
					}
  
				} else if ( material.isPointsMaterial ) {
  
					refreshUniformsPoints( m_uniforms, material );
  
				} else if ( material.isShadowMaterial ) {
  
					m_uniforms.color.value = material.color;
					m_uniforms.opacity.value = material.opacity;
  
				}
  
				// RectAreaLight Texture
				// TODO (mrdoob): Find a nicer implementation
  
				if ( m_uniforms.ltc_1 !== undefined ) m_uniforms.ltc_1.value = UniformsLib.LTC_1;
				if ( m_uniforms.ltc_2 !== undefined ) m_uniforms.ltc_2.value = UniformsLib.LTC_2;
  
				WebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, _this );
  
			}
  
			if ( material.isShaderMaterial && material.uniformsNeedUpdate === true ) {
  
				WebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, _this );
				material.uniformsNeedUpdate = false;
  
			}
  
			// common matrices
  
			p_uniforms.setValue( _gl, 'modelViewMatrix', object.modelViewMatrix );
			p_uniforms.setValue( _gl, 'normalMatrix', object.normalMatrix );
			p_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );
  
			return program;
  
		}
  
		// Uniforms (refresh uniforms objects)
  
		function refreshUniformsCommon( uniforms, material ) {
  
			uniforms.opacity.value = material.opacity;
  
			if ( material.color ) {
  
				uniforms.diffuse.value = material.color;
  
			}
  
			if ( material.emissive ) {
  
				uniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );
  
			}
  
			if ( material.map ) {
  
				uniforms.map.value = material.map;
  
			}
  
			if ( material.alphaMap ) {
  
				uniforms.alphaMap.value = material.alphaMap;
  
			}
  
			if ( material.specularMap ) {
  
				uniforms.specularMap.value = material.specularMap;
  
			}
  
			if ( material.envMap ) {
  
				uniforms.envMap.value = material.envMap;
  
				// don't flip CubeTexture envMaps, flip everything else:
				//  WebGLRenderTargetCube will be flipped for backwards compatibility
				//  WebGLRenderTargetCube.texture will be flipped because it's a Texture and NOT a CubeTexture
				// this check must be handled differently, or removed entirely, if WebGLRenderTargetCube uses a CubeTexture in the future
				uniforms.flipEnvMap.value = ( ! ( material.envMap && material.envMap.isCubeTexture ) ) ? 1 : - 1;
  
				uniforms.reflectivity.value = material.reflectivity;
				uniforms.refractionRatio.value = material.refractionRatio;
  
				uniforms.maxMipLevel.value = properties.get( material.envMap ).__maxMipLevel;
  
			}
  
			if ( material.lightMap ) {
  
				uniforms.lightMap.value = material.lightMap;
				uniforms.lightMapIntensity.value = material.lightMapIntensity;
  
			}
  
			if ( material.aoMap ) {
  
				uniforms.aoMap.value = material.aoMap;
				uniforms.aoMapIntensity.value = material.aoMapIntensity;
  
			}
  
			// uv repeat and offset setting priorities
			// 1. color map
			// 2. specular map
			// 3. normal map
			// 4. bump map
			// 5. alpha map
			// 6. emissive map
  
			var uvScaleMap;
  
			if ( material.map ) {
  
				uvScaleMap = material.map;
  
			} else if ( material.specularMap ) {
  
				uvScaleMap = material.specularMap;
  
			} else if ( material.displacementMap ) {
  
				uvScaleMap = material.displacementMap;
  
			} else if ( material.normalMap ) {
  
				uvScaleMap = material.normalMap;
  
			} else if ( material.bumpMap ) {
  
				uvScaleMap = material.bumpMap;
  
			} else if ( material.roughnessMap ) {
  
				uvScaleMap = material.roughnessMap;
  
			} else if ( material.metalnessMap ) {
  
				uvScaleMap = material.metalnessMap;
  
			} else if ( material.alphaMap ) {
  
				uvScaleMap = material.alphaMap;
  
			} else if ( material.emissiveMap ) {
  
				uvScaleMap = material.emissiveMap;
  
			}
  
			if ( uvScaleMap !== undefined ) {
  
				// backwards compatibility
				if ( uvScaleMap.isWebGLRenderTarget ) {
  
					uvScaleMap = uvScaleMap.texture;
  
				}
  
				if ( uvScaleMap.matrixAutoUpdate === true ) {
  
					uvScaleMap.updateMatrix();
  
				}
  
				uniforms.uvTransform.value.copy( uvScaleMap.matrix );
  
			}
  
		}
  
		function refreshUniformsLine( uniforms, material ) {
  
			uniforms.diffuse.value = material.color;
			uniforms.opacity.value = material.opacity;
  
		}
  
		function refreshUniformsDash( uniforms, material ) {
  
			uniforms.dashSize.value = material.dashSize;
			uniforms.totalSize.value = material.dashSize + material.gapSize;
			uniforms.scale.value = material.scale;
  
		}
  
		function refreshUniformsPoints( uniforms, material ) {
  
			uniforms.diffuse.value = material.color;
			uniforms.opacity.value = material.opacity;
			uniforms.size.value = material.size * _pixelRatio;
			uniforms.scale.value = _height * 0.5;
  
			uniforms.map.value = material.map;
  
			if ( material.map !== null ) {
  
				if ( material.map.matrixAutoUpdate === true ) {
  
					material.map.updateMatrix();
  
				}
  
				uniforms.uvTransform.value.copy( material.map.matrix );
  
			}
  
		}
  
		function refreshUniformsFog( uniforms, fog ) {
  
			uniforms.fogColor.value = fog.color;
  
			if ( fog.isFog ) {
  
				uniforms.fogNear.value = fog.near;
				uniforms.fogFar.value = fog.far;
  
			} else if ( fog.isFogExp2 ) {
  
				uniforms.fogDensity.value = fog.density;
  
			}
  
		}
  
		function refreshUniformsLambert( uniforms, material ) {
  
			if ( material.emissiveMap ) {
  
				uniforms.emissiveMap.value = material.emissiveMap;
  
			}
  
		}
  
		function refreshUniformsPhong( uniforms, material ) {
  
			uniforms.specular.value = material.specular;
			uniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )
  
			if ( material.emissiveMap ) {
  
				uniforms.emissiveMap.value = material.emissiveMap;
  
			}
  
			if ( material.bumpMap ) {
  
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;
  
			}
  
			if ( material.normalMap ) {
  
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );
				if ( material.side === BackSide ) uniforms.normalScale.value.negate();
  
			}
  
			if ( material.displacementMap ) {
  
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
  
			}
  
		}
  
		function refreshUniformsToon( uniforms, material ) {
  
			refreshUniformsPhong( uniforms, material );
  
			if ( material.gradientMap ) {
  
				uniforms.gradientMap.value = material.gradientMap;
  
			}
  
		}
  
		function refreshUniformsStandard( uniforms, material ) {
  
			uniforms.roughness.value = material.roughness;
			uniforms.metalness.value = material.metalness;
  
			if ( material.roughnessMap ) {
  
				uniforms.roughnessMap.value = material.roughnessMap;
  
			}
  
			if ( material.metalnessMap ) {
  
				uniforms.metalnessMap.value = material.metalnessMap;
  
			}
  
			if ( material.emissiveMap ) {
  
				uniforms.emissiveMap.value = material.emissiveMap;
  
			}
  
			if ( material.bumpMap ) {
  
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;
  
			}
  
			if ( material.normalMap ) {
  
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );
				if ( material.side === BackSide ) uniforms.normalScale.value.negate();
  
			}
  
			if ( material.displacementMap ) {
  
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
  
			}
  
			if ( material.envMap ) {
  
				//uniforms.envMap.value = material.envMap; // part of uniforms common
				uniforms.envMapIntensity.value = material.envMapIntensity;
  
			}
  
		}
  
		function refreshUniformsPhysical( uniforms, material ) {
  
			uniforms.clearCoat.value = material.clearCoat;
			uniforms.clearCoatRoughness.value = material.clearCoatRoughness;
  
			refreshUniformsStandard( uniforms, material );
  
		}
  
		function refreshUniformsDepth( uniforms, material ) {
  
			if ( material.displacementMap ) {
  
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
  
			}
  
		}
  
		function refreshUniformsDistance( uniforms, material ) {
  
			if ( material.displacementMap ) {
  
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
  
			}
  
			uniforms.referencePosition.value.copy( material.referencePosition );
			uniforms.nearDistance.value = material.nearDistance;
			uniforms.farDistance.value = material.farDistance;
  
		}
  
		function refreshUniformsNormal( uniforms, material ) {
  
			if ( material.bumpMap ) {
  
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;
  
			}
  
			if ( material.normalMap ) {
  
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );
				if ( material.side === BackSide ) uniforms.normalScale.value.negate();
  
			}
  
			if ( material.displacementMap ) {
  
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
  
			}
  
		}
  
		// If uniforms are marked as clean, they don't need to be loaded to the GPU.
  
		function markUniformsLightsNeedsUpdate( uniforms, value ) {
  
			uniforms.ambientLightColor.needsUpdate = value;
  
			uniforms.directionalLights.needsUpdate = value;
			uniforms.pointLights.needsUpdate = value;
			uniforms.spotLights.needsUpdate = value;
			uniforms.rectAreaLights.needsUpdate = value;
			uniforms.hemisphereLights.needsUpdate = value;
  
		}
  
		// Textures
  
		function allocTextureUnit() {
  
			var textureUnit = _usedTextureUnits;
  
			if ( textureUnit >= capabilities.maxTextures ) {
  
				console.warn( 'THREE.WebGLRenderer: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + capabilities.maxTextures );
  
			}
  
			_usedTextureUnits += 1;
  
			return textureUnit;
  
		}
  
		this.allocTextureUnit = allocTextureUnit;
  
		// this.setTexture2D = setTexture2D;
		this.setTexture2D = ( function () {
  
			var warned = false;
  
			// backwards compatibility: peel texture.texture
			return function setTexture2D( texture, slot ) {
  
				if ( texture && texture.isWebGLRenderTarget ) {
  
					if ( ! warned ) {
  
						console.warn( "THREE.WebGLRenderer.setTexture2D: don't use render targets as textures. Use their .texture property instead." );
						warned = true;
  
					}
  
					texture = texture.texture;
  
				}
  
				textures.setTexture2D( texture, slot );
  
			};
  
		}() );
  
		this.setTexture = ( function () {
  
			var warned = false;
  
			return function setTexture( texture, slot ) {
  
				if ( ! warned ) {
  
					console.warn( "THREE.WebGLRenderer: .setTexture is deprecated, use setTexture2D instead." );
					warned = true;
  
				}
  
				textures.setTexture2D( texture, slot );
  
			};
  
		}() );
  
		this.setTextureCube = ( function () {
  
			var warned = false;
  
			return function setTextureCube( texture, slot ) {
  
				// backwards compatibility: peel texture.texture
				if ( texture && texture.isWebGLRenderTargetCube ) {
  
					if ( ! warned ) {
  
						console.warn( "THREE.WebGLRenderer.setTextureCube: don't use cube render targets as textures. Use their .texture property instead." );
						warned = true;
  
					}
  
					texture = texture.texture;
  
				}
  
				// currently relying on the fact that WebGLRenderTargetCube.texture is a Texture and NOT a CubeTexture
				// TODO: unify these code paths
				if ( ( texture && texture.isCubeTexture ) ||
					( Array.isArray( texture.image ) && texture.image.length === 6 ) ) {
  
					// CompressedTexture can have Array in image :/
  
					// this function alone should take care of cube textures
					textures.setTextureCube( texture, slot );
  
				} else {
  
					// assumed: texture property of THREE.WebGLRenderTargetCube
  
					textures.setTextureCubeDynamic( texture, slot );
  
				}
  
			};
  
		}() );
  
		//
  
		this.setFramebuffer = function ( value ) {
  
			_framebuffer = value;
  
		};
  
		this.getRenderTarget = function () {
  
			return _currentRenderTarget;
  
		};
  
		this.setRenderTarget = function ( renderTarget ) {
  
			_currentRenderTarget = renderTarget;
  
			if ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {
  
				textures.setupRenderTarget( renderTarget );
  
			}
  
			var framebuffer = _framebuffer;
			var isCube = false;
  
			if ( renderTarget ) {
  
				var __webglFramebuffer = properties.get( renderTarget ).__webglFramebuffer;
  
				if ( renderTarget.isWebGLRenderTargetCube ) {
  
					framebuffer = __webglFramebuffer[ renderTarget.activeCubeFace ];
					isCube = true;
  
				} else {
  
					framebuffer = __webglFramebuffer;
  
				}
  
				_currentViewport.copy( renderTarget.viewport );
				_currentScissor.copy( renderTarget.scissor );
				_currentScissorTest = renderTarget.scissorTest;
  
			} else {
  
				_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio );
				_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio );
				_currentScissorTest = _scissorTest;
  
			}
  
			if ( _currentFramebuffer !== framebuffer ) {
  
				_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
				_currentFramebuffer = framebuffer;
  
			}
  
			state.viewport( _currentViewport );
			state.scissor( _currentScissor );
			state.setScissorTest( _currentScissorTest );
  
			if ( isCube ) {
  
				var textureProperties = properties.get( renderTarget.texture );
				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + renderTarget.activeCubeFace, textureProperties.__webglTexture, renderTarget.activeMipMapLevel );
  
			}
  
		};
  
		this.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer ) {
  
			if ( ! ( renderTarget && renderTarget.isWebGLRenderTarget ) ) {
  
				console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );
				return;
  
			}
  
			var framebuffer = properties.get( renderTarget ).__webglFramebuffer;
  
			if ( framebuffer ) {
  
				var restore = false;
  
				if ( framebuffer !== _currentFramebuffer ) {
  
					_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
  
					restore = true;
  
				}
  
				try {
  
					var texture = renderTarget.texture;
					var textureFormat = texture.format;
					var textureType = texture.type;
  
					if ( textureFormat !== RGBAFormat && utils.convert( textureFormat ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_FORMAT ) ) {
  
						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );
						return;
  
					}
  
					if ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_TYPE ) && // IE11, Edge and Chrome Mac < 52 (#9513)
						! ( textureType === FloatType && ( extensions.get( 'OES_texture_float' ) || extensions.get( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox
						! ( textureType === HalfFloatType && extensions.get( 'EXT_color_buffer_half_float' ) ) ) {
  
						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );
						return;
  
					}
  
					if ( _gl.checkFramebufferStatus( _gl.FRAMEBUFFER ) === _gl.FRAMEBUFFER_COMPLETE ) {
  
						// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)
  
						if ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {
  
							_gl.readPixels( x, y, width, height, utils.convert( textureFormat ), utils.convert( textureType ), buffer );
  
						}
  
					} else {
  
						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );
  
					}
  
				} finally {
  
					if ( restore ) {
  
						_gl.bindFramebuffer( _gl.FRAMEBUFFER, _currentFramebuffer );
  
					}
  
				}
  
			}
  
		};
  
		this.copyFramebufferToTexture = function ( position, texture, level ) {
  
			var width = texture.image.width;
			var height = texture.image.height;
			var glFormat = utils.convert( texture.format );
  
			this.setTexture2D( texture, 0 );
  
			_gl.copyTexImage2D( _gl.TEXTURE_2D, level || 0, glFormat, position.x, position.y, width, height, 0 );
  
		};
  
		this.copyTextureToTexture = function ( position, srcTexture, dstTexture, level ) {
  
			var width = srcTexture.image.width;
			var height = srcTexture.image.height;
			var glFormat = utils.convert( dstTexture.format );
			var glType = utils.convert( dstTexture.type );
  
			this.setTexture2D( dstTexture, 0 );
  
			if ( srcTexture.isDataTexture ) {
  
				_gl.texSubImage2D( _gl.TEXTURE_2D, level || 0, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );
  
			} else {
  
				_gl.texSubImage2D( _gl.TEXTURE_2D, level || 0, position.x, position.y, glFormat, glType, srcTexture.image );
  
			}
  
		};
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function FogExp2( color, density ) {
  
		this.name = '';
  
		this.color = new Color( color );
		this.density = ( density !== undefined ) ? density : 0.00025;
  
	}
  
	FogExp2.prototype.isFogExp2 = true;
  
	FogExp2.prototype.clone = function () {
  
		return new FogExp2( this.color, this.density );
  
	};
  
	FogExp2.prototype.toJSON = function ( /* meta */ ) {
  
		return {
			type: 'FogExp2',
			color: this.color.getHex(),
			density: this.density
		};
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Fog( color, near, far ) {
  
		this.name = '';
  
		this.color = new Color( color );
  
		this.near = ( near !== undefined ) ? near : 1;
		this.far = ( far !== undefined ) ? far : 1000;
  
	}
  
	Fog.prototype.isFog = true;
  
	Fog.prototype.clone = function () {
  
		return new Fog( this.color, this.near, this.far );
  
	};
  
	Fog.prototype.toJSON = function ( /* meta */ ) {
  
		return {
			type: 'Fog',
			color: this.color.getHex(),
			near: this.near,
			far: this.far
		};
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Scene() {
  
		Object3D.call( this );
  
		this.type = 'Scene';
  
		this.background = null;
		this.fog = null;
		this.overrideMaterial = null;
  
		this.autoUpdate = true; // checked by the renderer
  
	}
  
	Scene.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Scene,
  
		copy: function ( source, recursive ) {
  
			Object3D.prototype.copy.call( this, source, recursive );
  
			if ( source.background !== null ) this.background = source.background.clone();
			if ( source.fog !== null ) this.fog = source.fog.clone();
			if ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();
  
			this.autoUpdate = source.autoUpdate;
			this.matrixAutoUpdate = source.matrixAutoUpdate;
  
			return this;
  
		},
  
		toJSON: function ( meta ) {
  
			var data = Object3D.prototype.toJSON.call( this, meta );
  
			if ( this.background !== null ) data.object.background = this.background.toJSON( meta );
			if ( this.fog !== null ) data.object.fog = this.fog.toJSON();
  
			return data;
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *	uvOffset: new THREE.Vector2(),
	 *	uvScale: new THREE.Vector2()
	 * }
	 */
  
	function SpriteMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'SpriteMaterial';
  
		this.color = new Color( 0xffffff );
		this.map = null;
  
		this.rotation = 0;
  
		this.fog = false;
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	SpriteMaterial.prototype = Object.create( Material.prototype );
	SpriteMaterial.prototype.constructor = SpriteMaterial;
	SpriteMaterial.prototype.isSpriteMaterial = true;
  
	SpriteMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
		this.map = source.map;
  
		this.rotation = source.rotation;
  
		return this;
  
	};
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Sprite( material ) {
  
		Object3D.call( this );
  
		this.type = 'Sprite';
  
		this.material = ( material !== undefined ) ? material : new SpriteMaterial();
  
		this.center = new Vector2( 0.5, 0.5 );
  
	}
  
	Sprite.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Sprite,
  
		isSprite: true,
  
		raycast: ( function () {
  
			var intersectPoint = new Vector3();
			var worldPosition = new Vector3();
			var worldScale = new Vector3();
  
			return function raycast( raycaster, intersects ) {
  
				worldPosition.setFromMatrixPosition( this.matrixWorld );
				raycaster.ray.closestPointToPoint( worldPosition, intersectPoint );
  
				worldScale.setFromMatrixScale( this.matrixWorld );
				var guessSizeSq = worldScale.x * worldScale.y / 4;
  
				if ( worldPosition.distanceToSquared( intersectPoint ) > guessSizeSq ) return;
  
				var distance = raycaster.ray.origin.distanceTo( intersectPoint );
  
				if ( distance < raycaster.near || distance > raycaster.far ) return;
  
				intersects.push( {
  
					distance: distance,
					point: intersectPoint.clone(),
					face: null,
					object: this
  
				} );
  
			};
  
		}() ),
  
		clone: function () {
  
			return new this.constructor( this.material ).copy( this );
  
		},
  
		copy: function ( source ) {
  
			Object3D.prototype.copy.call( this, source );
  
			if ( source.center !== undefined ) this.center.copy( source.center );
  
			return this;
  
		}
  
  
	} );
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function LOD() {
  
		Object3D.call( this );
  
		this.type = 'LOD';
  
		Object.defineProperties( this, {
			levels: {
				enumerable: true,
				value: []
			}
		} );
  
	}
  
	LOD.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: LOD,
  
		copy: function ( source ) {
  
			Object3D.prototype.copy.call( this, source, false );
  
			var levels = source.levels;
  
			for ( var i = 0, l = levels.length; i < l; i ++ ) {
  
				var level = levels[ i ];
  
				this.addLevel( level.object.clone(), level.distance );
  
			}
  
			return this;
  
		},
  
		addLevel: function ( object, distance ) {
  
			if ( distance === undefined ) distance = 0;
  
			distance = Math.abs( distance );
  
			var levels = this.levels;
  
			for ( var l = 0; l < levels.length; l ++ ) {
  
				if ( distance < levels[ l ].distance ) {
  
					break;
  
				}
  
			}
  
			levels.splice( l, 0, { distance: distance, object: object } );
  
			this.add( object );
  
		},
  
		getObjectForDistance: function ( distance ) {
  
			var levels = this.levels;
  
			for ( var i = 1, l = levels.length; i < l; i ++ ) {
  
				if ( distance < levels[ i ].distance ) {
  
					break;
  
				}
  
			}
  
			return levels[ i - 1 ].object;
  
		},
  
		raycast: ( function () {
  
			var matrixPosition = new Vector3();
  
			return function raycast( raycaster, intersects ) {
  
				matrixPosition.setFromMatrixPosition( this.matrixWorld );
  
				var distance = raycaster.ray.origin.distanceTo( matrixPosition );
  
				this.getObjectForDistance( distance ).raycast( raycaster, intersects );
  
			};
  
		}() ),
  
		update: function () {
  
			var v1 = new Vector3();
			var v2 = new Vector3();
  
			return function update( camera ) {
  
				var levels = this.levels;
  
				if ( levels.length > 1 ) {
  
					v1.setFromMatrixPosition( camera.matrixWorld );
					v2.setFromMatrixPosition( this.matrixWorld );
  
					var distance = v1.distanceTo( v2 );
  
					levels[ 0 ].object.visible = true;
  
					for ( var i = 1, l = levels.length; i < l; i ++ ) {
  
						if ( distance >= levels[ i ].distance ) {
  
							levels[ i - 1 ].object.visible = false;
							levels[ i ].object.visible = true;
  
						} else {
  
							break;
  
						}
  
					}
  
					for ( ; i < l; i ++ ) {
  
						levels[ i ].object.visible = false;
  
					}
  
				}
  
			};
  
		}(),
  
		toJSON: function ( meta ) {
  
			var data = Object3D.prototype.toJSON.call( this, meta );
  
			data.object.levels = [];
  
			var levels = this.levels;
  
			for ( var i = 0, l = levels.length; i < l; i ++ ) {
  
				var level = levels[ i ];
  
				data.object.levels.push( {
					object: level.object.uuid,
					distance: level.distance
				} );
  
			}
  
			return data;
  
		}
  
	} );
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author michael guerrero / http://realitymeltdown.com
	 * @author ikerr / http://verold.com
	 */
  
	function Skeleton( bones, boneInverses ) {
  
		// copy the bone array
  
		bones = bones || [];
  
		this.bones = bones.slice( 0 );
		this.boneMatrices = new Float32Array( this.bones.length * 16 );
  
		// use the supplied bone inverses or calculate the inverses
  
		if ( boneInverses === undefined ) {
  
			this.calculateInverses();
  
		} else {
  
			if ( this.bones.length === boneInverses.length ) {
  
				this.boneInverses = boneInverses.slice( 0 );
  
			} else {
  
				console.warn( 'THREE.Skeleton boneInverses is the wrong length.' );
  
				this.boneInverses = [];
  
				for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
  
					this.boneInverses.push( new Matrix4() );
  
				}
  
			}
  
		}
  
	}
  
	Object.assign( Skeleton.prototype, {
  
		calculateInverses: function () {
  
			this.boneInverses = [];
  
			for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
  
				var inverse = new Matrix4();
  
				if ( this.bones[ i ] ) {
  
					inverse.getInverse( this.bones[ i ].matrixWorld );
  
				}
  
				this.boneInverses.push( inverse );
  
			}
  
		},
  
		pose: function () {
  
			var bone, i, il;
  
			// recover the bind-time world matrices
  
			for ( i = 0, il = this.bones.length; i < il; i ++ ) {
  
				bone = this.bones[ i ];
  
				if ( bone ) {
  
					bone.matrixWorld.getInverse( this.boneInverses[ i ] );
  
				}
  
			}
  
			// compute the local matrices, positions, rotations and scales
  
			for ( i = 0, il = this.bones.length; i < il; i ++ ) {
  
				bone = this.bones[ i ];
  
				if ( bone ) {
  
					if ( bone.parent && bone.parent.isBone ) {
  
						bone.matrix.getInverse( bone.parent.matrixWorld );
						bone.matrix.multiply( bone.matrixWorld );
  
					} else {
  
						bone.matrix.copy( bone.matrixWorld );
  
					}
  
					bone.matrix.decompose( bone.position, bone.quaternion, bone.scale );
  
				}
  
			}
  
		},
  
		update: ( function () {
  
			var offsetMatrix = new Matrix4();
			var identityMatrix = new Matrix4();
  
			return function update() {
  
				var bones = this.bones;
				var boneInverses = this.boneInverses;
				var boneMatrices = this.boneMatrices;
				var boneTexture = this.boneTexture;
  
				// flatten bone matrices to array
  
				for ( var i = 0, il = bones.length; i < il; i ++ ) {
  
					// compute the offset between the current and the original transform
  
					var matrix = bones[ i ] ? bones[ i ].matrixWorld : identityMatrix;
  
					offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );
					offsetMatrix.toArray( boneMatrices, i * 16 );
  
				}
  
				if ( boneTexture !== undefined ) {
  
					boneTexture.needsUpdate = true;
  
				}
  
			};
  
		} )(),
  
		clone: function () {
  
			return new Skeleton( this.bones, this.boneInverses );
  
		},
  
		getBoneByName: function ( name ) {
  
			for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
  
				var bone = this.bones[ i ];
  
				if ( bone.name === name ) {
  
					return bone;
  
				}
  
			}
  
			return undefined;
  
		}
  
	} );
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author ikerr / http://verold.com
	 */
  
	function Bone() {
  
		Object3D.call( this );
  
		this.type = 'Bone';
  
	}
  
	Bone.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Bone,
  
		isBone: true
  
	} );
  
	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author ikerr / http://verold.com
	 */
  
	function SkinnedMesh( geometry, material ) {
  
		Mesh.call( this, geometry, material );
  
		this.type = 'SkinnedMesh';
  
		this.bindMode = 'attached';
		this.bindMatrix = new Matrix4();
		this.bindMatrixInverse = new Matrix4();
  
		var bones = this.initBones();
		var skeleton = new Skeleton( bones );
  
		this.bind( skeleton, this.matrixWorld );
  
		this.normalizeSkinWeights();
  
	}
  
	SkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {
  
		constructor: SkinnedMesh,
  
		isSkinnedMesh: true,
  
		initBones: function () {
  
			var bones = [], bone, gbone;
			var i, il;
  
			if ( this.geometry && this.geometry.bones !== undefined ) {
  
				// first, create array of 'Bone' objects from geometry data
  
				for ( i = 0, il = this.geometry.bones.length; i < il; i ++ ) {
  
					gbone = this.geometry.bones[ i ];
  
					// create new 'Bone' object
  
					bone = new Bone();
					bones.push( bone );
  
					// apply values
  
					bone.name = gbone.name;
					bone.position.fromArray( gbone.pos );
					bone.quaternion.fromArray( gbone.rotq );
					if ( gbone.scl !== undefined ) bone.scale.fromArray( gbone.scl );
  
				}
  
				// second, create bone hierarchy
  
				for ( i = 0, il = this.geometry.bones.length; i < il; i ++ ) {
  
					gbone = this.geometry.bones[ i ];
  
					if ( ( gbone.parent !== - 1 ) && ( gbone.parent !== null ) && ( bones[ gbone.parent ] !== undefined ) ) {
  
						// subsequent bones in the hierarchy
  
						bones[ gbone.parent ].add( bones[ i ] );
  
					} else {
  
						// topmost bone, immediate child of the skinned mesh
  
						this.add( bones[ i ] );
  
					}
  
				}
  
			}
  
			// now the bones are part of the scene graph and children of the skinned mesh.
			// let's update the corresponding matrices
  
			this.updateMatrixWorld( true );
  
			return bones;
  
		},
  
		bind: function ( skeleton, bindMatrix ) {
  
			this.skeleton = skeleton;
  
			if ( bindMatrix === undefined ) {
  
				this.updateMatrixWorld( true );
  
				this.skeleton.calculateInverses();
  
				bindMatrix = this.matrixWorld;
  
			}
  
			this.bindMatrix.copy( bindMatrix );
			this.bindMatrixInverse.getInverse( bindMatrix );
  
		},
  
		pose: function () {
  
			this.skeleton.pose();
  
		},
  
		normalizeSkinWeights: function () {
  
			var scale, i;
  
			if ( this.geometry && this.geometry.isGeometry ) {
  
				for ( i = 0; i < this.geometry.skinWeights.length; i ++ ) {
  
					var sw = this.geometry.skinWeights[ i ];
  
					scale = 1.0 / sw.manhattanLength();
  
					if ( scale !== Infinity ) {
  
						sw.multiplyScalar( scale );
  
					} else {
  
						sw.set( 1, 0, 0, 0 ); // do something reasonable
  
					}
  
				}
  
			} else if ( this.geometry && this.geometry.isBufferGeometry ) {
  
				var vec = new Vector4();
  
				var skinWeight = this.geometry.attributes.skinWeight;
  
				for ( i = 0; i < skinWeight.count; i ++ ) {
  
					vec.x = skinWeight.getX( i );
					vec.y = skinWeight.getY( i );
					vec.z = skinWeight.getZ( i );
					vec.w = skinWeight.getW( i );
  
					scale = 1.0 / vec.manhattanLength();
  
					if ( scale !== Infinity ) {
  
						vec.multiplyScalar( scale );
  
					} else {
  
						vec.set( 1, 0, 0, 0 ); // do something reasonable
  
					}
  
					skinWeight.setXYZW( i, vec.x, vec.y, vec.z, vec.w );
  
				}
  
			}
  
		},
  
		updateMatrixWorld: function ( force ) {
  
			Mesh.prototype.updateMatrixWorld.call( this, force );
  
			if ( this.bindMode === 'attached' ) {
  
				this.bindMatrixInverse.getInverse( this.matrixWorld );
  
			} else if ( this.bindMode === 'detached' ) {
  
				this.bindMatrixInverse.getInverse( this.bindMatrix );
  
			} else {
  
				console.warn( 'THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode );
  
			}
  
		},
  
		clone: function () {
  
			return new this.constructor( this.geometry, this.material ).copy( this );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  linewidth: <float>,
	 *  linecap: "round",
	 *  linejoin: "round"
	 * }
	 */
  
	function LineBasicMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'LineBasicMaterial';
  
		this.color = new Color( 0xffffff );
  
		this.linewidth = 1;
		this.linecap = 'round';
		this.linejoin = 'round';
  
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	LineBasicMaterial.prototype = Object.create( Material.prototype );
	LineBasicMaterial.prototype.constructor = LineBasicMaterial;
  
	LineBasicMaterial.prototype.isLineBasicMaterial = true;
  
	LineBasicMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
  
		this.linewidth = source.linewidth;
		this.linecap = source.linecap;
		this.linejoin = source.linejoin;
  
		return this;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Line( geometry, material, mode ) {
  
		if ( mode === 1 ) {
  
			console.warn( 'THREE.Line: parameter THREE.LinePieces no longer supported. Created THREE.LineSegments instead.' );
			return new LineSegments( geometry, material );
  
		}
  
		Object3D.call( this );
  
		this.type = 'Line';
  
		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new LineBasicMaterial( { color: Math.random() * 0xffffff } );
  
	}
  
	Line.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Line,
  
		isLine: true,
  
		computeLineDistances: ( function () {
  
			var start = new Vector3();
			var end = new Vector3();
  
			return function computeLineDistances() {
  
				var geometry = this.geometry;
  
				if ( geometry.isBufferGeometry ) {
  
					// we assume non-indexed geometry
  
					if ( geometry.index === null ) {
  
						var positionAttribute = geometry.attributes.position;
						var lineDistances = [ 0 ];
  
						for ( var i = 1, l = positionAttribute.count; i < l; i ++ ) {
  
							start.fromBufferAttribute( positionAttribute, i - 1 );
							end.fromBufferAttribute( positionAttribute, i );
  
							lineDistances[ i ] = lineDistances[ i - 1 ];
							lineDistances[ i ] += start.distanceTo( end );
  
						}
  
						geometry.addAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );
  
					} else {
  
						console.warn( 'THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );
  
					}
  
				} else if ( geometry.isGeometry ) {
  
					var vertices = geometry.vertices;
					var lineDistances = geometry.lineDistances;
  
					lineDistances[ 0 ] = 0;
  
					for ( var i = 1, l = vertices.length; i < l; i ++ ) {
  
						lineDistances[ i ] = lineDistances[ i - 1 ];
						lineDistances[ i ] += vertices[ i - 1 ].distanceTo( vertices[ i ] );
  
					}
  
				}
  
				return this;
  
			};
  
		}() ),
  
		raycast: ( function () {
  
			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();
  
			return function raycast( raycaster, intersects ) {
  
				var precision = raycaster.linePrecision;
				var precisionSq = precision * precision;
  
				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;
  
				// Checking boundingSphere distance to ray
  
				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();
  
				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );
  
				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;
  
				//
  
				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );
  
				var vStart = new Vector3();
				var vEnd = new Vector3();
				var interSegment = new Vector3();
				var interRay = new Vector3();
				var step = ( this && this.isLineSegments ) ? 2 : 1;
  
				if ( geometry.isBufferGeometry ) {
  
					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;
  
					if ( index !== null ) {
  
						var indices = index.array;
  
						for ( var i = 0, l = indices.length - 1; i < l; i += step ) {
  
							var a = indices[ i ];
							var b = indices[ i + 1 ];
  
							vStart.fromArray( positions, a * 3 );
							vEnd.fromArray( positions, b * 3 );
  
							var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );
  
							if ( distSq > precisionSq ) continue;
  
							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation
  
							var distance = raycaster.ray.origin.distanceTo( interRay );
  
							if ( distance < raycaster.near || distance > raycaster.far ) continue;
  
							intersects.push( {
  
								distance: distance,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i,
								face: null,
								faceIndex: null,
								object: this
  
							} );
  
						}
  
					} else {
  
						for ( var i = 0, l = positions.length / 3 - 1; i < l; i += step ) {
  
							vStart.fromArray( positions, 3 * i );
							vEnd.fromArray( positions, 3 * i + 3 );
  
							var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );
  
							if ( distSq > precisionSq ) continue;
  
							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation
  
							var distance = raycaster.ray.origin.distanceTo( interRay );
  
							if ( distance < raycaster.near || distance > raycaster.far ) continue;
  
							intersects.push( {
  
								distance: distance,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i,
								face: null,
								faceIndex: null,
								object: this
  
							} );
  
						}
  
					}
  
				} else if ( geometry.isGeometry ) {
  
					var vertices = geometry.vertices;
					var nbVertices = vertices.length;
  
					for ( var i = 0; i < nbVertices - 1; i += step ) {
  
						var distSq = ray.distanceSqToSegment( vertices[ i ], vertices[ i + 1 ], interRay, interSegment );
  
						if ( distSq > precisionSq ) continue;
  
						interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation
  
						var distance = raycaster.ray.origin.distanceTo( interRay );
  
						if ( distance < raycaster.near || distance > raycaster.far ) continue;
  
						intersects.push( {
  
							distance: distance,
							// What do we want? intersection point on the ray or on the segment??
							// point: raycaster.ray.at( distance ),
							point: interSegment.clone().applyMatrix4( this.matrixWorld ),
							index: i,
							face: null,
							faceIndex: null,
							object: this
  
						} );
  
					}
  
				}
  
			};
  
		}() ),
  
		clone: function () {
  
			return new this.constructor( this.geometry, this.material ).copy( this );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function LineSegments( geometry, material ) {
  
		Line.call( this, geometry, material );
  
		this.type = 'LineSegments';
  
	}
  
	LineSegments.prototype = Object.assign( Object.create( Line.prototype ), {
  
		constructor: LineSegments,
  
		isLineSegments: true,
  
		computeLineDistances: ( function () {
  
			var start = new Vector3();
			var end = new Vector3();
  
			return function computeLineDistances() {
  
				var geometry = this.geometry;
  
				if ( geometry.isBufferGeometry ) {
  
					// we assume non-indexed geometry
  
					if ( geometry.index === null ) {
  
						var positionAttribute = geometry.attributes.position;
						var lineDistances = [];
  
						for ( var i = 0, l = positionAttribute.count; i < l; i += 2 ) {
  
							start.fromBufferAttribute( positionAttribute, i );
							end.fromBufferAttribute( positionAttribute, i + 1 );
  
							lineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];
							lineDistances[ i + 1 ] = lineDistances[ i ] + start.distanceTo( end );
  
						}
  
						geometry.addAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );
  
					} else {
  
						console.warn( 'THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );
  
					}
  
				} else if ( geometry.isGeometry ) {
  
					var vertices = geometry.vertices;
					var lineDistances = geometry.lineDistances;
  
					for ( var i = 0, l = vertices.length; i < l; i += 2 ) {
  
						start.copy( vertices[ i ] );
						end.copy( vertices[ i + 1 ] );
  
						lineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];
						lineDistances[ i + 1 ] = lineDistances[ i ] + start.distanceTo( end );
  
					}
  
				}
  
				return this;
  
			};
  
		}() )
  
	} );
  
	/**
	 * @author mgreter / http://github.com/mgreter
	 */
  
	function LineLoop( geometry, material ) {
  
		Line.call( this, geometry, material );
  
		this.type = 'LineLoop';
  
	}
  
	LineLoop.prototype = Object.assign( Object.create( Line.prototype ), {
  
		constructor: LineLoop,
  
		isLineLoop: true,
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  size: <float>,
	 *  sizeAttenuation: <bool>
	 *
	 *  morphTargets: <bool>
	 * }
	 */
  
	function PointsMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'PointsMaterial';
  
		this.color = new Color( 0xffffff );
  
		this.map = null;
  
		this.size = 1;
		this.sizeAttenuation = true;
  
		this.morphTargets = false;
  
		this.lights = false;
  
		this.setValues( parameters );
  
	}
  
	PointsMaterial.prototype = Object.create( Material.prototype );
	PointsMaterial.prototype.constructor = PointsMaterial;
  
	PointsMaterial.prototype.isPointsMaterial = true;
  
	PointsMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
  
		this.map = source.map;
  
		this.size = source.size;
		this.sizeAttenuation = source.sizeAttenuation;
  
		this.morphTargets = source.morphTargets;
  
		return this;
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Points( geometry, material ) {
  
		Object3D.call( this );
  
		this.type = 'Points';
  
		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new PointsMaterial( { color: Math.random() * 0xffffff } );
  
	}
  
	Points.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Points,
  
		isPoints: true,
  
		raycast: ( function () {
  
			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();
  
			return function raycast( raycaster, intersects ) {
  
				var object = this;
				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;
				var threshold = raycaster.params.Points.threshold;
  
				// Checking boundingSphere distance to ray
  
				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();
  
				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );
				sphere.radius += threshold;
  
				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;
  
				//
  
				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );
  
				var localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
				var localThresholdSq = localThreshold * localThreshold;
				var position = new Vector3();
				var intersectPoint = new Vector3();
  
				function testPoint( point, index ) {
  
					var rayPointDistanceSq = ray.distanceSqToPoint( point );
  
					if ( rayPointDistanceSq < localThresholdSq ) {
  
						ray.closestPointToPoint( point, intersectPoint );
						intersectPoint.applyMatrix4( matrixWorld );
  
						var distance = raycaster.ray.origin.distanceTo( intersectPoint );
  
						if ( distance < raycaster.near || distance > raycaster.far ) return;
  
						intersects.push( {
  
							distance: distance,
							distanceToRay: Math.sqrt( rayPointDistanceSq ),
							point: intersectPoint.clone(),
							index: index,
							face: null,
							object: object
  
						} );
  
					}
  
				}
  
				if ( geometry.isBufferGeometry ) {
  
					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;
  
					if ( index !== null ) {
  
						var indices = index.array;
  
						for ( var i = 0, il = indices.length; i < il; i ++ ) {
  
							var a = indices[ i ];
  
							position.fromArray( positions, a * 3 );
  
							testPoint( position, a );
  
						}
  
					} else {
  
						for ( var i = 0, l = positions.length / 3; i < l; i ++ ) {
  
							position.fromArray( positions, i * 3 );
  
							testPoint( position, i );
  
						}
  
					}
  
				} else {
  
					var vertices = geometry.vertices;
  
					for ( var i = 0, l = vertices.length; i < l; i ++ ) {
  
						testPoint( vertices[ i ], i );
  
					}
  
				}
  
			};
  
		}() ),
  
		clone: function () {
  
			return new this.constructor( this.geometry, this.material ).copy( this );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Group() {
  
		Object3D.call( this );
  
		this.type = 'Group';
  
	}
  
	Group.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Group,
  
		isGroup: true
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function VideoTexture( video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {
  
		Texture.call( this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );
  
		this.generateMipmaps = false;
  
	}
  
	VideoTexture.prototype = Object.assign( Object.create( Texture.prototype ), {
  
		constructor: VideoTexture,
  
		isVideoTexture: true,
  
		update: function () {
  
			var video = this.image;
  
			if ( video.readyState >= video.HAVE_CURRENT_DATA ) {
  
				this.needsUpdate = true;
  
			}
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {
  
		Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );
  
		this.image = { width: width, height: height };
		this.mipmaps = mipmaps;
  
		// no flipping for cube textures
		// (also flipping doesn't work for compressed textures )
  
		this.flipY = false;
  
		// can't generate mipmaps for compressed textures
		// mips must be embedded in DDS files
  
		this.generateMipmaps = false;
  
	}
  
	CompressedTexture.prototype = Object.create( Texture.prototype );
	CompressedTexture.prototype.constructor = CompressedTexture;
  
	CompressedTexture.prototype.isCompressedTexture = true;
  
	/**
	 * @author Matt DesLauriers / @mattdesl
	 * @author atix / arthursilber.de
	 */
  
	function DepthTexture( width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format ) {
  
		format = format !== undefined ? format : DepthFormat;
  
		if ( format !== DepthFormat && format !== DepthStencilFormat ) {
  
			throw new Error( 'DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat' );
  
		}
  
		if ( type === undefined && format === DepthFormat ) type = UnsignedShortType;
		if ( type === undefined && format === DepthStencilFormat ) type = UnsignedInt248Type;
  
		Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );
  
		this.image = { width: width, height: height };
  
		this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
		this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;
  
		this.flipY = false;
		this.generateMipmaps	= false;
  
	}
  
	DepthTexture.prototype = Object.create( Texture.prototype );
	DepthTexture.prototype.constructor = DepthTexture;
	DepthTexture.prototype.isDepthTexture = true;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function WireframeGeometry( geometry ) {
  
		BufferGeometry.call( this );
  
		this.type = 'WireframeGeometry';
  
		// buffer
  
		var vertices = [];
  
		// helper variables
  
		var i, j, l, o, ol;
		var edge = [ 0, 0 ], edges = {}, e, edge1, edge2;
		var key, keys = [ 'a', 'b', 'c' ];
		var vertex;
  
		// different logic for Geometry and BufferGeometry
  
		if ( geometry && geometry.isGeometry ) {
  
			// create a data structure that contains all edges without duplicates
  
			var faces = geometry.faces;
  
			for ( i = 0, l = faces.length; i < l; i ++ ) {
  
				var face = faces[ i ];
  
				for ( j = 0; j < 3; j ++ ) {
  
					edge1 = face[ keys[ j ] ];
					edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
					edge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates
					edge[ 1 ] = Math.max( edge1, edge2 );
  
					key = edge[ 0 ] + ',' + edge[ 1 ];
  
					if ( edges[ key ] === undefined ) {
  
						edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };
  
					}
  
				}
  
			}
  
			// generate vertices
  
			for ( key in edges ) {
  
				e = edges[ key ];
  
				vertex = geometry.vertices[ e.index1 ];
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				vertex = geometry.vertices[ e.index2 ];
				vertices.push( vertex.x, vertex.y, vertex.z );
  
			}
  
		} else if ( geometry && geometry.isBufferGeometry ) {
  
			var position, indices, groups;
			var group, start, count;
			var index1, index2;
  
			vertex = new Vector3();
  
			if ( geometry.index !== null ) {
  
				// indexed BufferGeometry
  
				position = geometry.attributes.position;
				indices = geometry.index;
				groups = geometry.groups;
  
				if ( groups.length === 0 ) {
  
					groups = [ { start: 0, count: indices.count, materialIndex: 0 } ];
  
				}
  
				// create a data structure that contains all eges without duplicates
  
				for ( o = 0, ol = groups.length; o < ol; ++ o ) {
  
					group = groups[ o ];
  
					start = group.start;
					count = group.count;
  
					for ( i = start, l = ( start + count ); i < l; i += 3 ) {
  
						for ( j = 0; j < 3; j ++ ) {
  
							edge1 = indices.getX( i + j );
							edge2 = indices.getX( i + ( j + 1 ) % 3 );
							edge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates
							edge[ 1 ] = Math.max( edge1, edge2 );
  
							key = edge[ 0 ] + ',' + edge[ 1 ];
  
							if ( edges[ key ] === undefined ) {
  
								edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };
  
							}
  
						}
  
					}
  
				}
  
				// generate vertices
  
				for ( key in edges ) {
  
					e = edges[ key ];
  
					vertex.fromBufferAttribute( position, e.index1 );
					vertices.push( vertex.x, vertex.y, vertex.z );
  
					vertex.fromBufferAttribute( position, e.index2 );
					vertices.push( vertex.x, vertex.y, vertex.z );
  
				}
  
			} else {
  
				// non-indexed BufferGeometry
  
				position = geometry.attributes.position;
  
				for ( i = 0, l = ( position.count / 3 ); i < l; i ++ ) {
  
					for ( j = 0; j < 3; j ++ ) {
  
						// three edges per triangle, an edge is represented as (index1, index2)
						// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)
  
						index1 = 3 * i + j;
						vertex.fromBufferAttribute( position, index1 );
						vertices.push( vertex.x, vertex.y, vertex.z );
  
						index2 = 3 * i + ( ( j + 1 ) % 3 );
						vertex.fromBufferAttribute( position, index2 );
						vertices.push( vertex.x, vertex.y, vertex.z );
  
					}
  
				}
  
			}
  
		}
  
		// build geometry
  
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
  
	}
  
	WireframeGeometry.prototype = Object.create( BufferGeometry.prototype );
	WireframeGeometry.prototype.constructor = WireframeGeometry;
  
	/**
	 * @author zz85 / https://github.com/zz85
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * Parametric Surfaces Geometry
	 * based on the brilliant article by @prideout http://prideout.net/blog/?p=44
	 */
  
	// ParametricGeometry
  
	function ParametricGeometry( func, slices, stacks ) {
  
		Geometry.call( this );
  
		this.type = 'ParametricGeometry';
  
		this.parameters = {
			func: func,
			slices: slices,
			stacks: stacks
		};
  
		this.fromBufferGeometry( new ParametricBufferGeometry( func, slices, stacks ) );
		this.mergeVertices();
  
	}
  
	ParametricGeometry.prototype = Object.create( Geometry.prototype );
	ParametricGeometry.prototype.constructor = ParametricGeometry;
  
	// ParametricBufferGeometry
  
	function ParametricBufferGeometry( func, slices, stacks ) {
  
		BufferGeometry.call( this );
  
		this.type = 'ParametricBufferGeometry';
  
		this.parameters = {
			func: func,
			slices: slices,
			stacks: stacks
		};
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		var EPS = 0.00001;
  
		var normal = new Vector3();
  
		var p0 = new Vector3(), p1 = new Vector3();
		var pu = new Vector3(), pv = new Vector3();
  
		var i, j;
  
		if ( func.length < 3 ) {
  
			console.error( 'THREE.ParametricGeometry: Function must now modify a Vector3 as third parameter.' );
  
		}
  
		// generate vertices, normals and uvs
  
		var sliceCount = slices + 1;
  
		for ( i = 0; i <= stacks; i ++ ) {
  
			var v = i / stacks;
  
			for ( j = 0; j <= slices; j ++ ) {
  
				var u = j / slices;
  
				// vertex
  
				func( u, v, p0 );
				vertices.push( p0.x, p0.y, p0.z );
  
				// normal
  
				// approximate tangent vectors via finite differences
  
				if ( u - EPS >= 0 ) {
  
					func( u - EPS, v, p1 );
					pu.subVectors( p0, p1 );
  
				} else {
  
					func( u + EPS, v, p1 );
					pu.subVectors( p1, p0 );
  
				}
  
				if ( v - EPS >= 0 ) {
  
					func( u, v - EPS, p1 );
					pv.subVectors( p0, p1 );
  
				} else {
  
					func( u, v + EPS, p1 );
					pv.subVectors( p1, p0 );
  
				}
  
				// cross product of tangent vectors returns surface normal
  
				normal.crossVectors( pu, pv ).normalize();
				normals.push( normal.x, normal.y, normal.z );
  
				// uv
  
				uvs.push( u, v );
  
			}
  
		}
  
		// generate indices
  
		for ( i = 0; i < stacks; i ++ ) {
  
			for ( j = 0; j < slices; j ++ ) {
  
				var a = i * sliceCount + j;
				var b = i * sliceCount + j + 1;
				var c = ( i + 1 ) * sliceCount + j + 1;
				var d = ( i + 1 ) * sliceCount + j;
  
				// faces one and two
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	ParametricBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ParametricBufferGeometry.prototype.constructor = ParametricBufferGeometry;
  
	/**
	 * @author clockworkgeek / https://github.com/clockworkgeek
	 * @author timothypratley / https://github.com/timothypratley
	 * @author WestLangley / http://github.com/WestLangley
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// PolyhedronGeometry
  
	function PolyhedronGeometry( vertices, indices, radius, detail ) {
  
		Geometry.call( this );
  
		this.type = 'PolyhedronGeometry';
  
		this.parameters = {
			vertices: vertices,
			indices: indices,
			radius: radius,
			detail: detail
		};
  
		this.fromBufferGeometry( new PolyhedronBufferGeometry( vertices, indices, radius, detail ) );
		this.mergeVertices();
  
	}
  
	PolyhedronGeometry.prototype = Object.create( Geometry.prototype );
	PolyhedronGeometry.prototype.constructor = PolyhedronGeometry;
  
	// PolyhedronBufferGeometry
  
	function PolyhedronBufferGeometry( vertices, indices, radius, detail ) {
  
		BufferGeometry.call( this );
  
		this.type = 'PolyhedronBufferGeometry';
  
		this.parameters = {
			vertices: vertices,
			indices: indices,
			radius: radius,
			detail: detail
		};
  
		radius = radius || 1;
		detail = detail || 0;
  
		// default buffer data
  
		var vertexBuffer = [];
		var uvBuffer = [];
  
		// the subdivision creates the vertex buffer data
  
		subdivide( detail );
  
		// all vertices should lie on a conceptual sphere with a given radius
  
		appplyRadius( radius );
  
		// finally, create the uv data
  
		generateUVs();
  
		// build non-indexed geometry
  
		this.addAttribute( 'position', new Float32BufferAttribute( vertexBuffer, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( vertexBuffer.slice(), 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvBuffer, 2 ) );
  
		if ( detail === 0 ) {
  
			this.computeVertexNormals(); // flat normals
  
		} else {
  
			this.normalizeNormals(); // smooth normals
  
		}
  
		// helper functions
  
		function subdivide( detail ) {
  
			var a = new Vector3();
			var b = new Vector3();
			var c = new Vector3();
  
			// iterate over all faces and apply a subdivison with the given detail value
  
			for ( var i = 0; i < indices.length; i += 3 ) {
  
				// get the vertices of the face
  
				getVertexByIndex( indices[ i + 0 ], a );
				getVertexByIndex( indices[ i + 1 ], b );
				getVertexByIndex( indices[ i + 2 ], c );
  
				// perform subdivision
  
				subdivideFace( a, b, c, detail );
  
			}
  
		}
  
		function subdivideFace( a, b, c, detail ) {
  
			var cols = Math.pow( 2, detail );
  
			// we use this multidimensional array as a data structure for creating the subdivision
  
			var v = [];
  
			var i, j;
  
			// construct all of the vertices for this subdivision
  
			for ( i = 0; i <= cols; i ++ ) {
  
				v[ i ] = [];
  
				var aj = a.clone().lerp( c, i / cols );
				var bj = b.clone().lerp( c, i / cols );
  
				var rows = cols - i;
  
				for ( j = 0; j <= rows; j ++ ) {
  
					if ( j === 0 && i === cols ) {
  
						v[ i ][ j ] = aj;
  
					} else {
  
						v[ i ][ j ] = aj.clone().lerp( bj, j / rows );
  
					}
  
				}
  
			}
  
			// construct all of the faces
  
			for ( i = 0; i < cols; i ++ ) {
  
				for ( j = 0; j < 2 * ( cols - i ) - 1; j ++ ) {
  
					var k = Math.floor( j / 2 );
  
					if ( j % 2 === 0 ) {
  
						pushVertex( v[ i ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k ] );
						pushVertex( v[ i ][ k ] );
  
					} else {
  
						pushVertex( v[ i ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k ] );
  
					}
  
				}
  
			}
  
		}
  
		function appplyRadius( radius ) {
  
			var vertex = new Vector3();
  
			// iterate over the entire buffer and apply the radius to each vertex
  
			for ( var i = 0; i < vertexBuffer.length; i += 3 ) {
  
				vertex.x = vertexBuffer[ i + 0 ];
				vertex.y = vertexBuffer[ i + 1 ];
				vertex.z = vertexBuffer[ i + 2 ];
  
				vertex.normalize().multiplyScalar( radius );
  
				vertexBuffer[ i + 0 ] = vertex.x;
				vertexBuffer[ i + 1 ] = vertex.y;
				vertexBuffer[ i + 2 ] = vertex.z;
  
			}
  
		}
  
		function generateUVs() {
  
			var vertex = new Vector3();
  
			for ( var i = 0; i < vertexBuffer.length; i += 3 ) {
  
				vertex.x = vertexBuffer[ i + 0 ];
				vertex.y = vertexBuffer[ i + 1 ];
				vertex.z = vertexBuffer[ i + 2 ];
  
				var u = azimuth( vertex ) / 2 / Math.PI + 0.5;
				var v = inclination( vertex ) / Math.PI + 0.5;
				uvBuffer.push( u, 1 - v );
  
			}
  
			correctUVs();
  
			correctSeam();
  
		}
  
		function correctSeam() {
  
			// handle case when face straddles the seam, see #3269
  
			for ( var i = 0; i < uvBuffer.length; i += 6 ) {
  
				// uv data of a single face
  
				var x0 = uvBuffer[ i + 0 ];
				var x1 = uvBuffer[ i + 2 ];
				var x2 = uvBuffer[ i + 4 ];
  
				var max = Math.max( x0, x1, x2 );
				var min = Math.min( x0, x1, x2 );
  
				// 0.9 is somewhat arbitrary
  
				if ( max > 0.9 && min < 0.1 ) {
  
					if ( x0 < 0.2 ) uvBuffer[ i + 0 ] += 1;
					if ( x1 < 0.2 ) uvBuffer[ i + 2 ] += 1;
					if ( x2 < 0.2 ) uvBuffer[ i + 4 ] += 1;
  
				}
  
			}
  
		}
  
		function pushVertex( vertex ) {
  
			vertexBuffer.push( vertex.x, vertex.y, vertex.z );
  
		}
  
		function getVertexByIndex( index, vertex ) {
  
			var stride = index * 3;
  
			vertex.x = vertices[ stride + 0 ];
			vertex.y = vertices[ stride + 1 ];
			vertex.z = vertices[ stride + 2 ];
  
		}
  
		function correctUVs() {
  
			var a = new Vector3();
			var b = new Vector3();
			var c = new Vector3();
  
			var centroid = new Vector3();
  
			var uvA = new Vector2();
			var uvB = new Vector2();
			var uvC = new Vector2();
  
			for ( var i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6 ) {
  
				a.set( vertexBuffer[ i + 0 ], vertexBuffer[ i + 1 ], vertexBuffer[ i + 2 ] );
				b.set( vertexBuffer[ i + 3 ], vertexBuffer[ i + 4 ], vertexBuffer[ i + 5 ] );
				c.set( vertexBuffer[ i + 6 ], vertexBuffer[ i + 7 ], vertexBuffer[ i + 8 ] );
  
				uvA.set( uvBuffer[ j + 0 ], uvBuffer[ j + 1 ] );
				uvB.set( uvBuffer[ j + 2 ], uvBuffer[ j + 3 ] );
				uvC.set( uvBuffer[ j + 4 ], uvBuffer[ j + 5 ] );
  
				centroid.copy( a ).add( b ).add( c ).divideScalar( 3 );
  
				var azi = azimuth( centroid );
  
				correctUV( uvA, j + 0, a, azi );
				correctUV( uvB, j + 2, b, azi );
				correctUV( uvC, j + 4, c, azi );
  
			}
  
		}
  
		function correctUV( uv, stride, vector, azimuth ) {
  
			if ( ( azimuth < 0 ) && ( uv.x === 1 ) ) {
  
				uvBuffer[ stride ] = uv.x - 1;
  
			}
  
			if ( ( vector.x === 0 ) && ( vector.z === 0 ) ) {
  
				uvBuffer[ stride ] = azimuth / 2 / Math.PI + 0.5;
  
			}
  
		}
  
		// Angle around the Y axis, counter-clockwise when looking from above.
  
		function azimuth( vector ) {
  
			return Math.atan2( vector.z, - vector.x );
  
		}
  
  
		// Angle above the XZ plane.
  
		function inclination( vector ) {
  
			return Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );
  
		}
  
	}
  
	PolyhedronBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	PolyhedronBufferGeometry.prototype.constructor = PolyhedronBufferGeometry;
  
	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// TetrahedronGeometry
  
	function TetrahedronGeometry( radius, detail ) {
  
		Geometry.call( this );
  
		this.type = 'TetrahedronGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
		this.fromBufferGeometry( new TetrahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();
  
	}
  
	TetrahedronGeometry.prototype = Object.create( Geometry.prototype );
	TetrahedronGeometry.prototype.constructor = TetrahedronGeometry;
  
	// TetrahedronBufferGeometry
  
	function TetrahedronBufferGeometry( radius, detail ) {
  
		var vertices = [
			1, 1, 1, 	- 1, - 1, 1, 	- 1, 1, - 1, 	1, - 1, - 1
		];
  
		var indices = [
			2, 1, 0, 	0, 3, 2,	1, 3, 0,	2, 3, 1
		];
  
		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );
  
		this.type = 'TetrahedronBufferGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
	}
  
	TetrahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	TetrahedronBufferGeometry.prototype.constructor = TetrahedronBufferGeometry;
  
	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// OctahedronGeometry
  
	function OctahedronGeometry( radius, detail ) {
  
		Geometry.call( this );
  
		this.type = 'OctahedronGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
		this.fromBufferGeometry( new OctahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();
  
	}
  
	OctahedronGeometry.prototype = Object.create( Geometry.prototype );
	OctahedronGeometry.prototype.constructor = OctahedronGeometry;
  
	// OctahedronBufferGeometry
  
	function OctahedronBufferGeometry( radius, detail ) {
  
		var vertices = [
			1, 0, 0, 	- 1, 0, 0,	0, 1, 0,
			0, - 1, 0, 	0, 0, 1,	0, 0, - 1
		];
  
		var indices = [
			0, 2, 4,	0, 4, 3,	0, 3, 5,
			0, 5, 2,	1, 2, 5,	1, 5, 3,
			1, 3, 4,	1, 4, 2
		];
  
		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );
  
		this.type = 'OctahedronBufferGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
	}
  
	OctahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	OctahedronBufferGeometry.prototype.constructor = OctahedronBufferGeometry;
  
	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// IcosahedronGeometry
  
	function IcosahedronGeometry( radius, detail ) {
  
		Geometry.call( this );
  
		this.type = 'IcosahedronGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
		this.fromBufferGeometry( new IcosahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();
  
	}
  
	IcosahedronGeometry.prototype = Object.create( Geometry.prototype );
	IcosahedronGeometry.prototype.constructor = IcosahedronGeometry;
  
	// IcosahedronBufferGeometry
  
	function IcosahedronBufferGeometry( radius, detail ) {
  
		var t = ( 1 + Math.sqrt( 5 ) ) / 2;
  
		var vertices = [
			- 1, t, 0, 	1, t, 0, 	- 1, - t, 0, 	1, - t, 0,
			 0, - 1, t, 	0, 1, t,	0, - 1, - t, 	0, 1, - t,
			 t, 0, - 1, 	t, 0, 1, 	- t, 0, - 1, 	- t, 0, 1
		];
  
		var indices = [
			 0, 11, 5, 	0, 5, 1, 	0, 1, 7, 	0, 7, 10, 	0, 10, 11,
			 1, 5, 9, 	5, 11, 4,	11, 10, 2,	10, 7, 6,	7, 1, 8,
			 3, 9, 4, 	3, 4, 2,	3, 2, 6,	3, 6, 8,	3, 8, 9,
			 4, 9, 5, 	2, 4, 11,	6, 2, 10,	8, 6, 7,	9, 8, 1
		];
  
		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );
  
		this.type = 'IcosahedronBufferGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
	}
  
	IcosahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	IcosahedronBufferGeometry.prototype.constructor = IcosahedronBufferGeometry;
  
	/**
	 * @author Abe Pazos / https://hamoid.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// DodecahedronGeometry
  
	function DodecahedronGeometry( radius, detail ) {
  
		Geometry.call( this );
  
		this.type = 'DodecahedronGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
		this.fromBufferGeometry( new DodecahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();
  
	}
  
	DodecahedronGeometry.prototype = Object.create( Geometry.prototype );
	DodecahedronGeometry.prototype.constructor = DodecahedronGeometry;
  
	// DodecahedronBufferGeometry
  
	function DodecahedronBufferGeometry( radius, detail ) {
  
		var t = ( 1 + Math.sqrt( 5 ) ) / 2;
		var r = 1 / t;
  
		var vertices = [
  
			// (±1, ±1, ±1)
			- 1, - 1, - 1,	- 1, - 1, 1,
			- 1, 1, - 1, - 1, 1, 1,
			1, - 1, - 1, 1, - 1, 1,
			1, 1, - 1, 1, 1, 1,
  
			// (0, ±1/φ, ±φ)
			 0, - r, - t, 0, - r, t,
			 0, r, - t, 0, r, t,
  
			// (±1/φ, ±φ, 0)
			- r, - t, 0, - r, t, 0,
			 r, - t, 0, r, t, 0,
  
			// (±φ, 0, ±1/φ)
			- t, 0, - r, t, 0, - r,
			- t, 0, r, t, 0, r
		];
  
		var indices = [
			3, 11, 7, 	3, 7, 15, 	3, 15, 13,
			7, 19, 17, 	7, 17, 6, 	7, 6, 15,
			17, 4, 8, 	17, 8, 10, 	17, 10, 6,
			8, 0, 16, 	8, 16, 2, 	8, 2, 10,
			0, 12, 1, 	0, 1, 18, 	0, 18, 16,
			6, 10, 2, 	6, 2, 13, 	6, 13, 15,
			2, 16, 18, 	2, 18, 3, 	2, 3, 13,
			18, 1, 9, 	18, 9, 11, 	18, 11, 3,
			4, 14, 12, 	4, 12, 0, 	4, 0, 8,
			11, 9, 5, 	11, 5, 19, 	11, 19, 7,
			19, 5, 14, 	19, 14, 4, 	19, 4, 17,
			1, 12, 14, 	1, 14, 5, 	1, 5, 9
		];
  
		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );
  
		this.type = 'DodecahedronBufferGeometry';
  
		this.parameters = {
			radius: radius,
			detail: detail
		};
  
	}
  
	DodecahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	DodecahedronBufferGeometry.prototype.constructor = DodecahedronBufferGeometry;
  
	/**
	 * @author oosmoxiecode / https://github.com/oosmoxiecode
	 * @author WestLangley / https://github.com/WestLangley
	 * @author zz85 / https://github.com/zz85
	 * @author miningold / https://github.com/miningold
	 * @author jonobr1 / https://github.com/jonobr1
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 */
  
	// TubeGeometry
  
	function TubeGeometry( path, tubularSegments, radius, radialSegments, closed, taper ) {
  
		Geometry.call( this );
  
		this.type = 'TubeGeometry';
  
		this.parameters = {
			path: path,
			tubularSegments: tubularSegments,
			radius: radius,
			radialSegments: radialSegments,
			closed: closed
		};
  
		if ( taper !== undefined ) console.warn( 'THREE.TubeGeometry: taper has been removed.' );
  
		var bufferGeometry = new TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed );
  
		// expose internals
  
		this.tangents = bufferGeometry.tangents;
		this.normals = bufferGeometry.normals;
		this.binormals = bufferGeometry.binormals;
  
		// create geometry
  
		this.fromBufferGeometry( bufferGeometry );
		this.mergeVertices();
  
	}
  
	TubeGeometry.prototype = Object.create( Geometry.prototype );
	TubeGeometry.prototype.constructor = TubeGeometry;
  
	// TubeBufferGeometry
  
	function TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed ) {
  
		BufferGeometry.call( this );
  
		this.type = 'TubeBufferGeometry';
  
		this.parameters = {
			path: path,
			tubularSegments: tubularSegments,
			radius: radius,
			radialSegments: radialSegments,
			closed: closed
		};
  
		tubularSegments = tubularSegments || 64;
		radius = radius || 1;
		radialSegments = radialSegments || 8;
		closed = closed || false;
  
		var frames = path.computeFrenetFrames( tubularSegments, closed );
  
		// expose internals
  
		this.tangents = frames.tangents;
		this.normals = frames.normals;
		this.binormals = frames.binormals;
  
		// helper variables
  
		var vertex = new Vector3();
		var normal = new Vector3();
		var uv = new Vector2();
		var P = new Vector3();
  
		var i, j;
  
		// buffer
  
		var vertices = [];
		var normals = [];
		var uvs = [];
		var indices = [];
  
		// create buffer data
  
		generateBufferData();
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
		// functions
  
		function generateBufferData() {
  
			for ( i = 0; i < tubularSegments; i ++ ) {
  
				generateSegment( i );
  
			}
  
			// if the geometry is not closed, generate the last row of vertices and normals
			// at the regular position on the given path
			//
			// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)
  
			generateSegment( ( closed === false ) ? tubularSegments : 0 );
  
			// uvs are generated in a separate function.
			// this makes it easy compute correct values for closed geometries
  
			generateUVs();
  
			// finally create faces
  
			generateIndices();
  
		}
  
		function generateSegment( i ) {
  
			// we use getPointAt to sample evenly distributed points from the given path
  
			P = path.getPointAt( i / tubularSegments, P );
  
			// retrieve corresponding normal and binormal
  
			var N = frames.normals[ i ];
			var B = frames.binormals[ i ];
  
			// generate normals and vertices for the current segment
  
			for ( j = 0; j <= radialSegments; j ++ ) {
  
				var v = j / radialSegments * Math.PI * 2;
  
				var sin = Math.sin( v );
				var cos = - Math.cos( v );
  
				// normal
  
				normal.x = ( cos * N.x + sin * B.x );
				normal.y = ( cos * N.y + sin * B.y );
				normal.z = ( cos * N.z + sin * B.z );
				normal.normalize();
  
				normals.push( normal.x, normal.y, normal.z );
  
				// vertex
  
				vertex.x = P.x + radius * normal.x;
				vertex.y = P.y + radius * normal.y;
				vertex.z = P.z + radius * normal.z;
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
			}
  
		}
  
		function generateIndices() {
  
			for ( j = 1; j <= tubularSegments; j ++ ) {
  
				for ( i = 1; i <= radialSegments; i ++ ) {
  
					var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
					var b = ( radialSegments + 1 ) * j + ( i - 1 );
					var c = ( radialSegments + 1 ) * j + i;
					var d = ( radialSegments + 1 ) * ( j - 1 ) + i;
  
					// faces
  
					indices.push( a, b, d );
					indices.push( b, c, d );
  
				}
  
			}
  
		}
  
		function generateUVs() {
  
			for ( i = 0; i <= tubularSegments; i ++ ) {
  
				for ( j = 0; j <= radialSegments; j ++ ) {
  
					uv.x = i / tubularSegments;
					uv.y = j / radialSegments;
  
					uvs.push( uv.x, uv.y );
  
				}
  
			}
  
		}
  
	}
  
	TubeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TubeBufferGeometry.prototype.constructor = TubeBufferGeometry;
  
	/**
	 * @author oosmoxiecode
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * based on http://www.blackpawn.com/texts/pqtorus/
	 */
  
	// TorusKnotGeometry
  
	function TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q, heightScale ) {
  
		Geometry.call( this );
  
		this.type = 'TorusKnotGeometry';
  
		this.parameters = {
			radius: radius,
			tube: tube,
			tubularSegments: tubularSegments,
			radialSegments: radialSegments,
			p: p,
			q: q
		};
  
		if ( heightScale !== undefined ) console.warn( 'THREE.TorusKnotGeometry: heightScale has been deprecated. Use .scale( x, y, z ) instead.' );
  
		this.fromBufferGeometry( new TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) );
		this.mergeVertices();
  
	}
  
	TorusKnotGeometry.prototype = Object.create( Geometry.prototype );
	TorusKnotGeometry.prototype.constructor = TorusKnotGeometry;
  
	// TorusKnotBufferGeometry
  
	function TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) {
  
		BufferGeometry.call( this );
  
		this.type = 'TorusKnotBufferGeometry';
  
		this.parameters = {
			radius: radius,
			tube: tube,
			tubularSegments: tubularSegments,
			radialSegments: radialSegments,
			p: p,
			q: q
		};
  
		radius = radius || 1;
		tube = tube || 0.4;
		tubularSegments = Math.floor( tubularSegments ) || 64;
		radialSegments = Math.floor( radialSegments ) || 8;
		p = p || 2;
		q = q || 3;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var i, j;
  
		var vertex = new Vector3();
		var normal = new Vector3();
  
		var P1 = new Vector3();
		var P2 = new Vector3();
  
		var B = new Vector3();
		var T = new Vector3();
		var N = new Vector3();
  
		// generate vertices, normals and uvs
  
		for ( i = 0; i <= tubularSegments; ++ i ) {
  
			// the radian "u" is used to calculate the position on the torus curve of the current tubular segement
  
			var u = i / tubularSegments * p * Math.PI * 2;
  
			// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
			// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions
  
			calculatePositionOnCurve( u, p, q, radius, P1 );
			calculatePositionOnCurve( u + 0.01, p, q, radius, P2 );
  
			// calculate orthonormal basis
  
			T.subVectors( P2, P1 );
			N.addVectors( P2, P1 );
			B.crossVectors( T, N );
			N.crossVectors( B, T );
  
			// normalize B, N. T can be ignored, we don't use it
  
			B.normalize();
			N.normalize();
  
			for ( j = 0; j <= radialSegments; ++ j ) {
  
				// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
				// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.
  
				var v = j / radialSegments * Math.PI * 2;
				var cx = - tube * Math.cos( v );
				var cy = tube * Math.sin( v );
  
				// now calculate the final vertex position.
				// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve
  
				vertex.x = P1.x + ( cx * N.x + cy * B.x );
				vertex.y = P1.y + ( cx * N.y + cy * B.y );
				vertex.z = P1.z + ( cx * N.z + cy * B.z );
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)
  
				normal.subVectors( vertex, P1 ).normalize();
  
				normals.push( normal.x, normal.y, normal.z );
  
				// uv
  
				uvs.push( i / tubularSegments );
				uvs.push( j / radialSegments );
  
			}
  
		}
  
		// generate indices
  
		for ( j = 1; j <= tubularSegments; j ++ ) {
  
			for ( i = 1; i <= radialSegments; i ++ ) {
  
				// indices
  
				var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
				var b = ( radialSegments + 1 ) * j + ( i - 1 );
				var c = ( radialSegments + 1 ) * j + i;
				var d = ( radialSegments + 1 ) * ( j - 1 ) + i;
  
				// faces
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
		// this function calculates the current position on the torus curve
  
		function calculatePositionOnCurve( u, p, q, radius, position ) {
  
			var cu = Math.cos( u );
			var su = Math.sin( u );
			var quOverP = q / p * u;
			var cs = Math.cos( quOverP );
  
			position.x = radius * ( 2 + cs ) * 0.5 * cu;
			position.y = radius * ( 2 + cs ) * su * 0.5;
			position.z = radius * Math.sin( quOverP ) * 0.5;
  
		}
  
	}
  
	TorusKnotBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TorusKnotBufferGeometry.prototype.constructor = TorusKnotBufferGeometry;
  
	/**
	 * @author oosmoxiecode
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// TorusGeometry
  
	function TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {
  
		Geometry.call( this );
  
		this.type = 'TorusGeometry';
  
		this.parameters = {
			radius: radius,
			tube: tube,
			radialSegments: radialSegments,
			tubularSegments: tubularSegments,
			arc: arc
		};
  
		this.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );
		this.mergeVertices();
  
	}
  
	TorusGeometry.prototype = Object.create( Geometry.prototype );
	TorusGeometry.prototype.constructor = TorusGeometry;
  
	// TorusBufferGeometry
  
	function TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {
  
		BufferGeometry.call( this );
  
		this.type = 'TorusBufferGeometry';
  
		this.parameters = {
			radius: radius,
			tube: tube,
			radialSegments: radialSegments,
			tubularSegments: tubularSegments,
			arc: arc
		};
  
		radius = radius || 1;
		tube = tube || 0.4;
		radialSegments = Math.floor( radialSegments ) || 8;
		tubularSegments = Math.floor( tubularSegments ) || 6;
		arc = arc || Math.PI * 2;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var center = new Vector3();
		var vertex = new Vector3();
		var normal = new Vector3();
  
		var j, i;
  
		// generate vertices, normals and uvs
  
		for ( j = 0; j <= radialSegments; j ++ ) {
  
			for ( i = 0; i <= tubularSegments; i ++ ) {
  
				var u = i / tubularSegments * arc;
				var v = j / radialSegments * Math.PI * 2;
  
				// vertex
  
				vertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );
				vertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );
				vertex.z = tube * Math.sin( v );
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// normal
  
				center.x = radius * Math.cos( u );
				center.y = radius * Math.sin( u );
				normal.subVectors( vertex, center ).normalize();
  
				normals.push( normal.x, normal.y, normal.z );
  
				// uv
  
				uvs.push( i / tubularSegments );
				uvs.push( j / radialSegments );
  
			}
  
		}
  
		// generate indices
  
		for ( j = 1; j <= radialSegments; j ++ ) {
  
			for ( i = 1; i <= tubularSegments; i ++ ) {
  
				// indices
  
				var a = ( tubularSegments + 1 ) * j + i - 1;
				var b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;
				var c = ( tubularSegments + 1 ) * ( j - 1 ) + i;
				var d = ( tubularSegments + 1 ) * j + i;
  
				// faces
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	TorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TorusBufferGeometry.prototype.constructor = TorusBufferGeometry;
  
	/**
	 * @author Mugen87 / https://github.com/Mugen87
	 * Port from https://github.com/mapbox/earcut (v2.1.2)
	 */
  
	var Earcut = {
  
		triangulate: function ( data, holeIndices, dim ) {
  
			dim = dim || 2;
  
			var hasHoles = holeIndices && holeIndices.length,
				outerLen = hasHoles ? holeIndices[ 0 ] * dim : data.length,
				outerNode = linkedList( data, 0, outerLen, dim, true ),
				triangles = [];
  
			if ( ! outerNode ) return triangles;
  
			var minX, minY, maxX, maxY, x, y, invSize;
  
			if ( hasHoles ) outerNode = eliminateHoles( data, holeIndices, outerNode, dim );
  
			// if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox
  
			if ( data.length > 80 * dim ) {
  
				minX = maxX = data[ 0 ];
				minY = maxY = data[ 1 ];
  
				for ( var i = dim; i < outerLen; i += dim ) {
  
					x = data[ i ];
					y = data[ i + 1 ];
					if ( x < minX ) minX = x;
					if ( y < minY ) minY = y;
					if ( x > maxX ) maxX = x;
					if ( y > maxY ) maxY = y;
  
				}
  
				// minX, minY and invSize are later used to transform coords into integers for z-order calculation
  
				invSize = Math.max( maxX - minX, maxY - minY );
				invSize = invSize !== 0 ? 1 / invSize : 0;
  
			}
  
			earcutLinked( outerNode, triangles, dim, minX, minY, invSize );
  
			return triangles;
  
		}
  
	};
  
	// create a circular doubly linked list from polygon points in the specified winding order
  
	function linkedList( data, start, end, dim, clockwise ) {
  
		var i, last;
  
		if ( clockwise === ( signedArea( data, start, end, dim ) > 0 ) ) {
  
			for ( i = start; i < end; i += dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );
  
		} else {
  
			for ( i = end - dim; i >= start; i -= dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );
  
		}
  
		if ( last && equals( last, last.next ) ) {
  
			removeNode( last );
			last = last.next;
  
		}
  
		return last;
  
	}
  
	// eliminate colinear or duplicate points
  
	function filterPoints( start, end ) {
  
		if ( ! start ) return start;
		if ( ! end ) end = start;
  
		var p = start, again;
  
		do {
  
			again = false;
  
			if ( ! p.steiner && ( equals( p, p.next ) || area( p.prev, p, p.next ) === 0 ) ) {
  
				removeNode( p );
				p = end = p.prev;
				if ( p === p.next ) break;
				again = true;
  
			} else {
  
				p = p.next;
  
			}
  
		} while ( again || p !== end );
  
		return end;
  
	}
  
	// main ear slicing loop which triangulates a polygon (given as a linked list)
  
	function earcutLinked( ear, triangles, dim, minX, minY, invSize, pass ) {
  
		if ( ! ear ) return;
  
		// interlink polygon nodes in z-order
  
		if ( ! pass && invSize ) indexCurve( ear, minX, minY, invSize );
  
		var stop = ear, prev, next;
  
		// iterate through ears, slicing them one by one
  
		while ( ear.prev !== ear.next ) {
  
			prev = ear.prev;
			next = ear.next;
  
			if ( invSize ? isEarHashed( ear, minX, minY, invSize ) : isEar( ear ) ) {
  
				// cut off the triangle
				triangles.push( prev.i / dim );
				triangles.push( ear.i / dim );
				triangles.push( next.i / dim );
  
				removeNode( ear );
  
				// skipping the next vertice leads to less sliver triangles
				ear = next.next;
				stop = next.next;
  
				continue;
  
			}
  
			ear = next;
  
			// if we looped through the whole remaining polygon and can't find any more ears
  
			if ( ear === stop ) {
  
				// try filtering points and slicing again
  
				if ( ! pass ) {
  
					earcutLinked( filterPoints( ear ), triangles, dim, minX, minY, invSize, 1 );
  
					// if this didn't work, try curing all small self-intersections locally
  
				} else if ( pass === 1 ) {
  
					ear = cureLocalIntersections( ear, triangles, dim );
					earcutLinked( ear, triangles, dim, minX, minY, invSize, 2 );
  
				// as a last resort, try splitting the remaining polygon into two
  
				} else if ( pass === 2 ) {
  
					splitEarcut( ear, triangles, dim, minX, minY, invSize );
  
				}
  
				break;
  
			}
  
		}
  
	}
  
	// check whether a polygon node forms a valid ear with adjacent nodes
  
	function isEar( ear ) {
  
		var a = ear.prev,
			b = ear,
			c = ear.next;
  
		if ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear
  
		// now make sure we don't have other points inside the potential ear
		var p = ear.next.next;
  
		while ( p !== ear.prev ) {
  
			if ( pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) && area( p.prev, p, p.next ) >= 0 ) {
  
				return false;
  
			}
  
			p = p.next;
  
		}
  
		return true;
  
	}
  
	function isEarHashed( ear, minX, minY, invSize ) {
  
		var a = ear.prev,
			b = ear,
			c = ear.next;
  
		if ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear
  
		// triangle bbox; min & max are calculated like this for speed
  
		var minTX = a.x < b.x ? ( a.x < c.x ? a.x : c.x ) : ( b.x < c.x ? b.x : c.x ),
			minTY = a.y < b.y ? ( a.y < c.y ? a.y : c.y ) : ( b.y < c.y ? b.y : c.y ),
			maxTX = a.x > b.x ? ( a.x > c.x ? a.x : c.x ) : ( b.x > c.x ? b.x : c.x ),
			maxTY = a.y > b.y ? ( a.y > c.y ? a.y : c.y ) : ( b.y > c.y ? b.y : c.y );
  
		// z-order range for the current triangle bbox;
  
		var minZ = zOrder( minTX, minTY, minX, minY, invSize ),
			maxZ = zOrder( maxTX, maxTY, minX, minY, invSize );
  
		// first look for points inside the triangle in increasing z-order
  
		var p = ear.nextZ;
  
		while ( p && p.z <= maxZ ) {
  
			if ( p !== ear.prev && p !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&
					area( p.prev, p, p.next ) >= 0 ) return false;
			p = p.nextZ;
  
		}
  
		// then look for points in decreasing z-order
  
		p = ear.prevZ;
  
		while ( p && p.z >= minZ ) {
  
			if ( p !== ear.prev && p !== ear.next &&
					pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&
					area( p.prev, p, p.next ) >= 0 ) return false;
  
			p = p.prevZ;
  
		}
  
		return true;
  
	}
  
	// go through all polygon nodes and cure small local self-intersections
  
	function cureLocalIntersections( start, triangles, dim ) {
  
		var p = start;
  
		do {
  
			var a = p.prev, b = p.next.next;
  
			if ( ! equals( a, b ) && intersects( a, p, p.next, b ) && locallyInside( a, b ) && locallyInside( b, a ) ) {
  
				triangles.push( a.i / dim );
				triangles.push( p.i / dim );
				triangles.push( b.i / dim );
  
				// remove two nodes involved
  
				removeNode( p );
				removeNode( p.next );
  
				p = start = b;
  
			}
  
			p = p.next;
  
		} while ( p !== start );
  
		return p;
  
	}
  
	// try splitting polygon into two and triangulate them independently
  
	function splitEarcut( start, triangles, dim, minX, minY, invSize ) {
  
		// look for a valid diagonal that divides the polygon into two
  
		var a = start;
  
		do {
  
			var b = a.next.next;
  
			while ( b !== a.prev ) {
  
				if ( a.i !== b.i && isValidDiagonal( a, b ) ) {
  
					// split the polygon in two by the diagonal
  
					var c = splitPolygon( a, b );
  
					// filter colinear points around the cuts
  
					a = filterPoints( a, a.next );
					c = filterPoints( c, c.next );
  
					// run earcut on each half
  
					earcutLinked( a, triangles, dim, minX, minY, invSize );
					earcutLinked( c, triangles, dim, minX, minY, invSize );
					return;
  
				}
  
				b = b.next;
  
			}
  
			a = a.next;
  
		} while ( a !== start );
  
	}
  
	// link every hole into the outer loop, producing a single-ring polygon without holes
  
	function eliminateHoles( data, holeIndices, outerNode, dim ) {
  
		var queue = [], i, len, start, end, list;
  
		for ( i = 0, len = holeIndices.length; i < len; i ++ ) {
  
			start = holeIndices[ i ] * dim;
			end = i < len - 1 ? holeIndices[ i + 1 ] * dim : data.length;
			list = linkedList( data, start, end, dim, false );
			if ( list === list.next ) list.steiner = true;
			queue.push( getLeftmost( list ) );
  
		}
  
		queue.sort( compareX );
  
		// process holes from left to right
  
		for ( i = 0; i < queue.length; i ++ ) {
  
			eliminateHole( queue[ i ], outerNode );
			outerNode = filterPoints( outerNode, outerNode.next );
  
		}
  
		return outerNode;
  
	}
  
	function compareX( a, b ) {
  
		return a.x - b.x;
  
	}
  
	// find a bridge between vertices that connects hole with an outer ring and and link it
  
	function eliminateHole( hole, outerNode ) {
  
		outerNode = findHoleBridge( hole, outerNode );
  
		if ( outerNode ) {
  
			var b = splitPolygon( outerNode, hole );
  
			filterPoints( b, b.next );
  
		}
  
	}
  
	// David Eberly's algorithm for finding a bridge between hole and outer polygon
  
	function findHoleBridge( hole, outerNode ) {
  
		var p = outerNode,
			hx = hole.x,
			hy = hole.y,
			qx = - Infinity,
			m;
  
		// find a segment intersected by a ray from the hole's leftmost point to the left;
		// segment's endpoint with lesser x will be potential connection point
  
		do {
  
			if ( hy <= p.y && hy >= p.next.y && p.next.y !== p.y ) {
  
				var x = p.x + ( hy - p.y ) * ( p.next.x - p.x ) / ( p.next.y - p.y );
  
				if ( x <= hx && x > qx ) {
  
					qx = x;
  
					if ( x === hx ) {
  
						if ( hy === p.y ) return p;
						if ( hy === p.next.y ) return p.next;
  
					}
  
					m = p.x < p.next.x ? p : p.next;
  
				}
  
			}
  
			p = p.next;
  
		} while ( p !== outerNode );
  
		if ( ! m ) return null;
  
		if ( hx === qx ) return m.prev; // hole touches outer segment; pick lower endpoint
  
		// look for points inside the triangle of hole point, segment intersection and endpoint;
		// if there are no points found, we have a valid connection;
		// otherwise choose the point of the minimum angle with the ray as connection point
  
		var stop = m,
			mx = m.x,
			my = m.y,
			tanMin = Infinity,
			tan;
  
		p = m.next;
  
		while ( p !== stop ) {
  
			if ( hx >= p.x && p.x >= mx && hx !== p.x &&
							pointInTriangle( hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y ) ) {
  
				tan = Math.abs( hy - p.y ) / ( hx - p.x ); // tangential
  
				if ( ( tan < tanMin || ( tan === tanMin && p.x > m.x ) ) && locallyInside( p, hole ) ) {
  
					m = p;
					tanMin = tan;
  
				}
  
			}
  
			p = p.next;
  
		}
  
		return m;
  
	}
  
	// interlink polygon nodes in z-order
  
	function indexCurve( start, minX, minY, invSize ) {
  
		var p = start;
  
		do {
  
			if ( p.z === null ) p.z = zOrder( p.x, p.y, minX, minY, invSize );
			p.prevZ = p.prev;
			p.nextZ = p.next;
			p = p.next;
  
		} while ( p !== start );
  
		p.prevZ.nextZ = null;
		p.prevZ = null;
  
		sortLinked( p );
  
	}
  
	// Simon Tatham's linked list merge sort algorithm
	// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html
  
	function sortLinked( list ) {
  
		var i, p, q, e, tail, numMerges, pSize, qSize, inSize = 1;
  
		do {
  
			p = list;
			list = null;
			tail = null;
			numMerges = 0;
  
			while ( p ) {
  
				numMerges ++;
				q = p;
				pSize = 0;
  
				for ( i = 0; i < inSize; i ++ ) {
  
					pSize ++;
					q = q.nextZ;
					if ( ! q ) break;
  
				}
  
				qSize = inSize;
  
				while ( pSize > 0 || ( qSize > 0 && q ) ) {
  
					if ( pSize !== 0 && ( qSize === 0 || ! q || p.z <= q.z ) ) {
  
						e = p;
						p = p.nextZ;
						pSize --;
  
					} else {
  
						e = q;
						q = q.nextZ;
						qSize --;
  
					}
  
					if ( tail ) tail.nextZ = e;
					else list = e;
  
					e.prevZ = tail;
					tail = e;
  
				}
  
				p = q;
  
			}
  
			tail.nextZ = null;
			inSize *= 2;
  
		} while ( numMerges > 1 );
  
		return list;
  
	}
  
	// z-order of a point given coords and inverse of the longer side of data bbox
  
	function zOrder( x, y, minX, minY, invSize ) {
  
		// coords are transformed into non-negative 15-bit integer range
  
		x = 32767 * ( x - minX ) * invSize;
		y = 32767 * ( y - minY ) * invSize;
  
		x = ( x | ( x << 8 ) ) & 0x00FF00FF;
		x = ( x | ( x << 4 ) ) & 0x0F0F0F0F;
		x = ( x | ( x << 2 ) ) & 0x33333333;
		x = ( x | ( x << 1 ) ) & 0x55555555;
  
		y = ( y | ( y << 8 ) ) & 0x00FF00FF;
		y = ( y | ( y << 4 ) ) & 0x0F0F0F0F;
		y = ( y | ( y << 2 ) ) & 0x33333333;
		y = ( y | ( y << 1 ) ) & 0x55555555;
  
		return x | ( y << 1 );
  
	}
  
	// find the leftmost node of a polygon ring
  
	function getLeftmost( start ) {
  
		var p = start, leftmost = start;
  
		do {
  
			if ( p.x < leftmost.x ) leftmost = p;
			p = p.next;
  
		} while ( p !== start );
  
		return leftmost;
  
	}
  
	// check if a point lies within a convex triangle
  
	function pointInTriangle( ax, ay, bx, by, cx, cy, px, py ) {
  
		return ( cx - px ) * ( ay - py ) - ( ax - px ) * ( cy - py ) >= 0 &&
		 ( ax - px ) * ( by - py ) - ( bx - px ) * ( ay - py ) >= 0 &&
		 ( bx - px ) * ( cy - py ) - ( cx - px ) * ( by - py ) >= 0;
  
	}
  
	// check if a diagonal between two polygon nodes is valid (lies in polygon interior)
  
	function isValidDiagonal( a, b ) {
  
		return a.next.i !== b.i && a.prev.i !== b.i && ! intersectsPolygon( a, b ) &&
			locallyInside( a, b ) && locallyInside( b, a ) && middleInside( a, b );
  
	}
  
	// signed area of a triangle
  
	function area( p, q, r ) {
  
		return ( q.y - p.y ) * ( r.x - q.x ) - ( q.x - p.x ) * ( r.y - q.y );
  
	}
  
	// check if two points are equal
  
	function equals( p1, p2 ) {
  
		return p1.x === p2.x && p1.y === p2.y;
  
	}
  
	// check if two segments intersect
  
	function intersects( p1, q1, p2, q2 ) {
  
		if ( ( equals( p1, q1 ) && equals( p2, q2 ) ) ||
				( equals( p1, q2 ) && equals( p2, q1 ) ) ) return true;
  
		return area( p1, q1, p2 ) > 0 !== area( p1, q1, q2 ) > 0 &&
					 area( p2, q2, p1 ) > 0 !== area( p2, q2, q1 ) > 0;
  
	}
  
	// check if a polygon diagonal intersects any polygon segments
  
	function intersectsPolygon( a, b ) {
  
		var p = a;
  
		do {
  
			if ( p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i &&
							intersects( p, p.next, a, b ) ) {
  
				return true;
  
			}
  
			p = p.next;
  
		} while ( p !== a );
  
		return false;
  
	}
  
	// check if a polygon diagonal is locally inside the polygon
  
	function locallyInside( a, b ) {
  
		return area( a.prev, a, a.next ) < 0 ?
			area( a, b, a.next ) >= 0 && area( a, a.prev, b ) >= 0 :
			area( a, b, a.prev ) < 0 || area( a, a.next, b ) < 0;
  
	}
  
	// check if the middle point of a polygon diagonal is inside the polygon
  
	function middleInside( a, b ) {
  
		var p = a,
			inside = false,
			px = ( a.x + b.x ) / 2,
			py = ( a.y + b.y ) / 2;
  
		do {
  
			if ( ( ( p.y > py ) !== ( p.next.y > py ) ) && p.next.y !== p.y &&
							( px < ( p.next.x - p.x ) * ( py - p.y ) / ( p.next.y - p.y ) + p.x ) ) {
  
				inside = ! inside;
  
			}
  
			p = p.next;
  
		} while ( p !== a );
  
		return inside;
  
	}
  
	// link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;
	// if one belongs to the outer ring and another to a hole, it merges it into a single ring
  
	function splitPolygon( a, b ) {
  
		var a2 = new Node( a.i, a.x, a.y ),
			b2 = new Node( b.i, b.x, b.y ),
			an = a.next,
			bp = b.prev;
  
		a.next = b;
		b.prev = a;
  
		a2.next = an;
		an.prev = a2;
  
		b2.next = a2;
		a2.prev = b2;
  
		bp.next = b2;
		b2.prev = bp;
  
		return b2;
  
	}
  
	// create a node and optionally link it with previous one (in a circular doubly linked list)
  
	function insertNode( i, x, y, last ) {
  
		var p = new Node( i, x, y );
  
		if ( ! last ) {
  
			p.prev = p;
			p.next = p;
  
		} else {
  
			p.next = last.next;
			p.prev = last;
			last.next.prev = p;
			last.next = p;
  
		}
  
		return p;
  
	}
  
	function removeNode( p ) {
  
		p.next.prev = p.prev;
		p.prev.next = p.next;
  
		if ( p.prevZ ) p.prevZ.nextZ = p.nextZ;
		if ( p.nextZ ) p.nextZ.prevZ = p.prevZ;
  
	}
  
	function Node( i, x, y ) {
  
		// vertice index in coordinates array
		this.i = i;
  
		// vertex coordinates
		this.x = x;
		this.y = y;
  
		// previous and next vertice nodes in a polygon ring
		this.prev = null;
		this.next = null;
  
		// z-order curve value
		this.z = null;
  
		// previous and next nodes in z-order
		this.prevZ = null;
		this.nextZ = null;
  
		// indicates whether this is a steiner point
		this.steiner = false;
  
	}
  
	function signedArea( data, start, end, dim ) {
  
		var sum = 0;
  
		for ( var i = start, j = end - dim; i < end; i += dim ) {
  
			sum += ( data[ j ] - data[ i ] ) * ( data[ i + 1 ] + data[ j + 1 ] );
			j = i;
  
		}
  
		return sum;
  
	}
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 */
  
	var ShapeUtils = {
  
		// calculate area of the contour polygon
  
		area: function ( contour ) {
  
			var n = contour.length;
			var a = 0.0;
  
			for ( var p = n - 1, q = 0; q < n; p = q ++ ) {
  
				a += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;
  
			}
  
			return a * 0.5;
  
		},
  
		isClockWise: function ( pts ) {
  
			return ShapeUtils.area( pts ) < 0;
  
		},
  
		triangulateShape: function ( contour, holes ) {
  
			var vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]
			var holeIndices = []; // array of hole indices
			var faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]
  
			removeDupEndPts( contour );
			addContour( vertices, contour );
  
			//
  
			var holeIndex = contour.length;
  
			holes.forEach( removeDupEndPts );
  
			for ( var i = 0; i < holes.length; i ++ ) {
  
				holeIndices.push( holeIndex );
				holeIndex += holes[ i ].length;
				addContour( vertices, holes[ i ] );
  
			}
  
			//
  
			var triangles = Earcut.triangulate( vertices, holeIndices );
  
			//
  
			for ( var i = 0; i < triangles.length; i += 3 ) {
  
				faces.push( triangles.slice( i, i + 3 ) );
  
			}
  
			return faces;
  
		}
  
	};
  
	function removeDupEndPts( points ) {
  
		var l = points.length;
  
		if ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {
  
			points.pop();
  
		}
  
	}
  
	function addContour( vertices, contour ) {
  
		for ( var i = 0; i < contour.length; i ++ ) {
  
			vertices.push( contour[ i ].x );
			vertices.push( contour[ i ].y );
  
		}
  
	}
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 * Creates extruded geometry from a path shape.
	 *
	 * parameters = {
	 *
	 *  curveSegments: <int>, // number of points on the curves
	 *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too
	 *  depth: <float>, // Depth to extrude the shape
	 *
	 *  bevelEnabled: <bool>, // turn on bevel
	 *  bevelThickness: <float>, // how deep into the original shape bevel goes
	 *  bevelSize: <float>, // how far from shape outline is bevel
	 *  bevelSegments: <int>, // number of bevel layers
	 *
	 *  extrudePath: <THREE.Curve> // curve to extrude shape along
	 *
	 *  UVGenerator: <Object> // object that provides UV generator functions
	 *
	 * }
	 */
  
	// ExtrudeGeometry
  
	function ExtrudeGeometry( shapes, options ) {
  
		Geometry.call( this );
  
		this.type = 'ExtrudeGeometry';
  
		this.parameters = {
			shapes: shapes,
			options: options
		};
  
		this.fromBufferGeometry( new ExtrudeBufferGeometry( shapes, options ) );
		this.mergeVertices();
  
	}
  
	ExtrudeGeometry.prototype = Object.create( Geometry.prototype );
	ExtrudeGeometry.prototype.constructor = ExtrudeGeometry;
  
	ExtrudeGeometry.prototype.toJSON = function () {
  
		var data = Geometry.prototype.toJSON.call( this );
  
		var shapes = this.parameters.shapes;
		var options = this.parameters.options;
  
		return toJSON( shapes, options, data );
  
	};
  
	// ExtrudeBufferGeometry
  
	function ExtrudeBufferGeometry( shapes, options ) {
  
		BufferGeometry.call( this );
  
		this.type = 'ExtrudeBufferGeometry';
  
		this.parameters = {
			shapes: shapes,
			options: options
		};
  
		shapes = Array.isArray( shapes ) ? shapes : [ shapes ];
  
		var scope = this;
  
		var verticesArray = [];
		var uvArray = [];
  
		for ( var i = 0, l = shapes.length; i < l; i ++ ) {
  
			var shape = shapes[ i ];
			addShape( shape );
  
		}
  
		// build geometry
  
		this.addAttribute( 'position', new Float32BufferAttribute( verticesArray, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvArray, 2 ) );
  
		this.computeVertexNormals();
  
		// functions
  
		function addShape( shape ) {
  
			var placeholder = [];
  
			// options
  
			var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
			var steps = options.steps !== undefined ? options.steps : 1;
			var depth = options.depth !== undefined ? options.depth : 100;
  
			var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;
			var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6;
			var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2;
			var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;
  
			var extrudePath = options.extrudePath;
  
			var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator;
  
			// deprecated options
  
			if ( options.amount !== undefined ) {
  
				console.warn( 'THREE.ExtrudeBufferGeometry: amount has been renamed to depth.' );
				depth = options.amount;
  
			}
  
			//
  
			var extrudePts, extrudeByPath = false;
			var splineTube, binormal, normal, position2;
  
			if ( extrudePath ) {
  
				extrudePts = extrudePath.getSpacedPoints( steps );
  
				extrudeByPath = true;
				bevelEnabled = false; // bevels not supported for path extrusion
  
				// SETUP TNB variables
  
				// TODO1 - have a .isClosed in spline?
  
				splineTube = extrudePath.computeFrenetFrames( steps, false );
  
				// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);
  
				binormal = new Vector3();
				normal = new Vector3();
				position2 = new Vector3();
  
			}
  
			// Safeguards if bevels are not enabled
  
			if ( ! bevelEnabled ) {
  
				bevelSegments = 0;
				bevelThickness = 0;
				bevelSize = 0;
  
			}
  
			// Variables initialization
  
			var ahole, h, hl; // looping of holes
  
			var shapePoints = shape.extractPoints( curveSegments );
  
			var vertices = shapePoints.shape;
			var holes = shapePoints.holes;
  
			var reverse = ! ShapeUtils.isClockWise( vertices );
  
			if ( reverse ) {
  
				vertices = vertices.reverse();
  
				// Maybe we should also check if holes are in the opposite direction, just to be safe ...
  
				for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
					ahole = holes[ h ];
  
					if ( ShapeUtils.isClockWise( ahole ) ) {
  
						holes[ h ] = ahole.reverse();
  
					}
  
				}
  
			}
  
  
			var faces = ShapeUtils.triangulateShape( vertices, holes );
  
			/* Vertices */
  
			var contour = vertices; // vertices has all points but contour has only points of circumference
  
			for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
				ahole = holes[ h ];
  
				vertices = vertices.concat( ahole );
  
			}
  
  
			function scalePt2( pt, vec, size ) {
  
				if ( ! vec ) console.error( "THREE.ExtrudeGeometry: vec does not exist" );
  
				return vec.clone().multiplyScalar( size ).add( pt );
  
			}
  
			var b, bs, t, z,
				vert, vlen = vertices.length,
				face, flen = faces.length;
  
  
			// Find directions for point movement
  
  
			function getBevelVec( inPt, inPrev, inNext ) {
  
				// computes for inPt the corresponding point inPt' on a new contour
				//   shifted by 1 unit (length of normalized vector) to the left
				// if we walk along contour clockwise, this new contour is outside the old one
				//
				// inPt' is the intersection of the two lines parallel to the two
				//  adjacent edges of inPt at a distance of 1 unit on the left side.
  
				var v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt
  
				// good reading for geometry algorithms (here: line-line intersection)
				// http://geomalgorithms.com/a05-_intersect-1.html
  
				var v_prev_x = inPt.x - inPrev.x,
					v_prev_y = inPt.y - inPrev.y;
				var v_next_x = inNext.x - inPt.x,
					v_next_y = inNext.y - inPt.y;
  
				var v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );
  
				// check for collinear edges
				var collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );
  
				if ( Math.abs( collinear0 ) > Number.EPSILON ) {
  
					// not collinear
  
					// length of vectors for normalizing
  
					var v_prev_len = Math.sqrt( v_prev_lensq );
					var v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );
  
					// shift adjacent points by unit vectors to the left
  
					var ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );
					var ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );
  
					var ptNextShift_x = ( inNext.x - v_next_y / v_next_len );
					var ptNextShift_y = ( inNext.y + v_next_x / v_next_len );
  
					// scaling factor for v_prev to intersection point
  
					var sf = ( ( ptNextShift_x - ptPrevShift_x ) * v_next_y -
							( ptNextShift_y - ptPrevShift_y ) * v_next_x ) /
						( v_prev_x * v_next_y - v_prev_y * v_next_x );
  
					// vector from inPt to intersection point
  
					v_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );
					v_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );
  
					// Don't normalize!, otherwise sharp corners become ugly
					//  but prevent crazy spikes
					var v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );
					if ( v_trans_lensq <= 2 ) {
  
						return new Vector2( v_trans_x, v_trans_y );
  
					} else {
  
						shrink_by = Math.sqrt( v_trans_lensq / 2 );
  
					}
  
				} else {
  
					// handle special case of collinear edges
  
					var direction_eq = false; // assumes: opposite
					if ( v_prev_x > Number.EPSILON ) {
  
						if ( v_next_x > Number.EPSILON ) {
  
							direction_eq = true;
  
						}
  
					} else {
  
						if ( v_prev_x < - Number.EPSILON ) {
  
							if ( v_next_x < - Number.EPSILON ) {
  
								direction_eq = true;
  
							}
  
						} else {
  
							if ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {
  
								direction_eq = true;
  
							}
  
						}
  
					}
  
					if ( direction_eq ) {
  
						// console.log("Warning: lines are a straight sequence");
						v_trans_x = - v_prev_y;
						v_trans_y = v_prev_x;
						shrink_by = Math.sqrt( v_prev_lensq );
  
					} else {
  
						// console.log("Warning: lines are a straight spike");
						v_trans_x = v_prev_x;
						v_trans_y = v_prev_y;
						shrink_by = Math.sqrt( v_prev_lensq / 2 );
  
					}
  
				}
  
				return new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );
  
			}
  
  
			var contourMovements = [];
  
			for ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {
  
				if ( j === il ) j = 0;
				if ( k === il ) k = 0;
  
				//  (j)---(i)---(k)
				// console.log('i,j,k', i, j , k)
  
				contourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );
  
			}
  
			var holesMovements = [],
				oneHoleMovements, verticesMovements = contourMovements.concat();
  
			for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
				ahole = holes[ h ];
  
				oneHoleMovements = [];
  
				for ( i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {
  
					if ( j === il ) j = 0;
					if ( k === il ) k = 0;
  
					//  (j)---(i)---(k)
					oneHoleMovements[ i ] = getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );
  
				}
  
				holesMovements.push( oneHoleMovements );
				verticesMovements = verticesMovements.concat( oneHoleMovements );
  
			}
  
  
			// Loop bevelSegments, 1 for the front, 1 for the back
  
			for ( b = 0; b < bevelSegments; b ++ ) {
  
				//for ( b = bevelSegments; b > 0; b -- ) {
  
				t = b / bevelSegments;
				z = bevelThickness * Math.cos( t * Math.PI / 2 );
				bs = bevelSize * Math.sin( t * Math.PI / 2 );
  
				// contract shape
  
				for ( i = 0, il = contour.length; i < il; i ++ ) {
  
					vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
  
					v( vert.x, vert.y, - z );
  
				}
  
				// expand holes
  
				for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
					ahole = holes[ h ];
					oneHoleMovements = holesMovements[ h ];
  
					for ( i = 0, il = ahole.length; i < il; i ++ ) {
  
						vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );
  
						v( vert.x, vert.y, - z );
  
					}
  
				}
  
			}
  
			bs = bevelSize;
  
			// Back facing vertices
  
			for ( i = 0; i < vlen; i ++ ) {
  
				vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];
  
				if ( ! extrudeByPath ) {
  
					v( vert.x, vert.y, 0 );
  
				} else {
  
					// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );
  
					normal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert.x );
					binormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert.y );
  
					position2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );
  
					v( position2.x, position2.y, position2.z );
  
				}
  
			}
  
			// Add stepped vertices...
			// Including front facing vertices
  
			var s;
  
			for ( s = 1; s <= steps; s ++ ) {
  
				for ( i = 0; i < vlen; i ++ ) {
  
					vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];
  
					if ( ! extrudeByPath ) {
  
						v( vert.x, vert.y, depth / steps * s );
  
					} else {
  
						// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );
  
						normal.copy( splineTube.normals[ s ] ).multiplyScalar( vert.x );
						binormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert.y );
  
						position2.copy( extrudePts[ s ] ).add( normal ).add( binormal );
  
						v( position2.x, position2.y, position2.z );
  
					}
  
				}
  
			}
  
  
			// Add bevel segments planes
  
			//for ( b = 1; b <= bevelSegments; b ++ ) {
			for ( b = bevelSegments - 1; b >= 0; b -- ) {
  
				t = b / bevelSegments;
				z = bevelThickness * Math.cos( t * Math.PI / 2 );
				bs = bevelSize * Math.sin( t * Math.PI / 2 );
  
				// contract shape
  
				for ( i = 0, il = contour.length; i < il; i ++ ) {
  
					vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
					v( vert.x, vert.y, depth + z );
  
				}
  
				// expand holes
  
				for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
					ahole = holes[ h ];
					oneHoleMovements = holesMovements[ h ];
  
					for ( i = 0, il = ahole.length; i < il; i ++ ) {
  
						vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );
  
						if ( ! extrudeByPath ) {
  
							v( vert.x, vert.y, depth + z );
  
						} else {
  
							v( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );
  
						}
  
					}
  
				}
  
			}
  
			/* Faces */
  
			// Top and bottom faces
  
			buildLidFaces();
  
			// Sides faces
  
			buildSideFaces();
  
  
			/////  Internal functions
  
			function buildLidFaces() {
  
				var start = verticesArray.length / 3;
  
				if ( bevelEnabled ) {
  
					var layer = 0; // steps + 1
					var offset = vlen * layer;
  
					// Bottom faces
  
					for ( i = 0; i < flen; i ++ ) {
  
						face = faces[ i ];
						f3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );
  
					}
  
					layer = steps + bevelSegments * 2;
					offset = vlen * layer;
  
					// Top faces
  
					for ( i = 0; i < flen; i ++ ) {
  
						face = faces[ i ];
						f3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset );
  
					}
  
				} else {
  
					// Bottom faces
  
					for ( i = 0; i < flen; i ++ ) {
  
						face = faces[ i ];
						f3( face[ 2 ], face[ 1 ], face[ 0 ] );
  
					}
  
					// Top faces
  
					for ( i = 0; i < flen; i ++ ) {
  
						face = faces[ i ];
						f3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps );
  
					}
  
				}
  
				scope.addGroup( start, verticesArray.length / 3 - start, 0 );
  
			}
  
			// Create faces for the z-sides of the shape
  
			function buildSideFaces() {
  
				var start = verticesArray.length / 3;
				var layeroffset = 0;
				sidewalls( contour, layeroffset );
				layeroffset += contour.length;
  
				for ( h = 0, hl = holes.length; h < hl; h ++ ) {
  
					ahole = holes[ h ];
					sidewalls( ahole, layeroffset );
  
					//, true
					layeroffset += ahole.length;
  
				}
  
  
				scope.addGroup( start, verticesArray.length / 3 - start, 1 );
  
  
			}
  
			function sidewalls( contour, layeroffset ) {
  
				var j, k;
				i = contour.length;
  
				while ( -- i >= 0 ) {
  
					j = i;
					k = i - 1;
					if ( k < 0 ) k = contour.length - 1;
  
					//console.log('b', i,j, i-1, k,vertices.length);
  
					var s = 0,
						sl = steps + bevelSegments * 2;
  
					for ( s = 0; s < sl; s ++ ) {
  
						var slen1 = vlen * s;
						var slen2 = vlen * ( s + 1 );
  
						var a = layeroffset + j + slen1,
							b = layeroffset + k + slen1,
							c = layeroffset + k + slen2,
							d = layeroffset + j + slen2;
  
						f4( a, b, c, d );
  
					}
  
				}
  
			}
  
			function v( x, y, z ) {
  
				placeholder.push( x );
				placeholder.push( y );
				placeholder.push( z );
  
			}
  
  
			function f3( a, b, c ) {
  
				addVertex( a );
				addVertex( b );
				addVertex( c );
  
				var nextIndex = verticesArray.length / 3;
				var uvs = uvgen.generateTopUV( scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1 );
  
				addUV( uvs[ 0 ] );
				addUV( uvs[ 1 ] );
				addUV( uvs[ 2 ] );
  
			}
  
			function f4( a, b, c, d ) {
  
				addVertex( a );
				addVertex( b );
				addVertex( d );
  
				addVertex( b );
				addVertex( c );
				addVertex( d );
  
  
				var nextIndex = verticesArray.length / 3;
				var uvs = uvgen.generateSideWallUV( scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1 );
  
				addUV( uvs[ 0 ] );
				addUV( uvs[ 1 ] );
				addUV( uvs[ 3 ] );
  
				addUV( uvs[ 1 ] );
				addUV( uvs[ 2 ] );
				addUV( uvs[ 3 ] );
  
			}
  
			function addVertex( index ) {
  
				verticesArray.push( placeholder[ index * 3 + 0 ] );
				verticesArray.push( placeholder[ index * 3 + 1 ] );
				verticesArray.push( placeholder[ index * 3 + 2 ] );
  
			}
  
  
			function addUV( vector2 ) {
  
				uvArray.push( vector2.x );
				uvArray.push( vector2.y );
  
			}
  
		}
  
	}
  
	ExtrudeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ExtrudeBufferGeometry.prototype.constructor = ExtrudeBufferGeometry;
  
	ExtrudeBufferGeometry.prototype.toJSON = function () {
  
		var data = BufferGeometry.prototype.toJSON.call( this );
  
		var shapes = this.parameters.shapes;
		var options = this.parameters.options;
  
		return toJSON( shapes, options, data );
  
	};
  
	//
  
	var WorldUVGenerator = {
  
		generateTopUV: function ( geometry, vertices, indexA, indexB, indexC ) {
  
			var a_x = vertices[ indexA * 3 ];
			var a_y = vertices[ indexA * 3 + 1 ];
			var b_x = vertices[ indexB * 3 ];
			var b_y = vertices[ indexB * 3 + 1 ];
			var c_x = vertices[ indexC * 3 ];
			var c_y = vertices[ indexC * 3 + 1 ];
  
			return [
				new Vector2( a_x, a_y ),
				new Vector2( b_x, b_y ),
				new Vector2( c_x, c_y )
			];
  
		},
  
		generateSideWallUV: function ( geometry, vertices, indexA, indexB, indexC, indexD ) {
  
			var a_x = vertices[ indexA * 3 ];
			var a_y = vertices[ indexA * 3 + 1 ];
			var a_z = vertices[ indexA * 3 + 2 ];
			var b_x = vertices[ indexB * 3 ];
			var b_y = vertices[ indexB * 3 + 1 ];
			var b_z = vertices[ indexB * 3 + 2 ];
			var c_x = vertices[ indexC * 3 ];
			var c_y = vertices[ indexC * 3 + 1 ];
			var c_z = vertices[ indexC * 3 + 2 ];
			var d_x = vertices[ indexD * 3 ];
			var d_y = vertices[ indexD * 3 + 1 ];
			var d_z = vertices[ indexD * 3 + 2 ];
  
			if ( Math.abs( a_y - b_y ) < 0.01 ) {
  
				return [
					new Vector2( a_x, 1 - a_z ),
					new Vector2( b_x, 1 - b_z ),
					new Vector2( c_x, 1 - c_z ),
					new Vector2( d_x, 1 - d_z )
				];
  
			} else {
  
				return [
					new Vector2( a_y, 1 - a_z ),
					new Vector2( b_y, 1 - b_z ),
					new Vector2( c_y, 1 - c_z ),
					new Vector2( d_y, 1 - d_z )
				];
  
			}
  
		}
	};
  
	function toJSON( shapes, options, data ) {
  
		//
  
		data.shapes = [];
  
		if ( Array.isArray( shapes ) ) {
  
			for ( var i = 0, l = shapes.length; i < l; i ++ ) {
  
				var shape = shapes[ i ];
  
				data.shapes.push( shape.uuid );
  
			}
  
		} else {
  
			data.shapes.push( shapes.uuid );
  
		}
  
		//
  
		if ( options.extrudePath !== undefined ) data.options.extrudePath = options.extrudePath.toJSON();
  
		return data;
  
	}
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * Text = 3D Text
	 *
	 * parameters = {
	 *  font: <THREE.Font>, // font
	 *
	 *  size: <float>, // size of the text
	 *  height: <float>, // thickness to extrude text
	 *  curveSegments: <int>, // number of points on the curves
	 *
	 *  bevelEnabled: <bool>, // turn on bevel
	 *  bevelThickness: <float>, // how deep into text bevel goes
	 *  bevelSize: <float> // how far from text outline is bevel
	 * }
	 */
  
	// TextGeometry
  
	function TextGeometry( text, parameters ) {
  
		Geometry.call( this );
  
		this.type = 'TextGeometry';
  
		this.parameters = {
			text: text,
			parameters: parameters
		};
  
		this.fromBufferGeometry( new TextBufferGeometry( text, parameters ) );
		this.mergeVertices();
  
	}
  
	TextGeometry.prototype = Object.create( Geometry.prototype );
	TextGeometry.prototype.constructor = TextGeometry;
  
	// TextBufferGeometry
  
	function TextBufferGeometry( text, parameters ) {
  
		parameters = parameters || {};
  
		var font = parameters.font;
  
		if ( ! ( font && font.isFont ) ) {
  
			console.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );
			return new Geometry();
  
		}
  
		var shapes = font.generateShapes( text, parameters.size, parameters.curveSegments );
  
		// translate parameters to ExtrudeGeometry API
  
		parameters.depth = parameters.height !== undefined ? parameters.height : 50;
  
		// defaults
  
		if ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;
		if ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;
		if ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;
  
		ExtrudeBufferGeometry.call( this, shapes, parameters );
  
		this.type = 'TextBufferGeometry';
  
	}
  
	TextBufferGeometry.prototype = Object.create( ExtrudeBufferGeometry.prototype );
	TextBufferGeometry.prototype.constructor = TextBufferGeometry;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author benaadams / https://twitter.com/ben_a_adams
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// SphereGeometry
  
	function SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {
  
		Geometry.call( this );
  
		this.type = 'SphereGeometry';
  
		this.parameters = {
			radius: radius,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			phiStart: phiStart,
			phiLength: phiLength,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		this.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );
		this.mergeVertices();
  
	}
  
	SphereGeometry.prototype = Object.create( Geometry.prototype );
	SphereGeometry.prototype.constructor = SphereGeometry;
  
	// SphereBufferGeometry
  
	function SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {
  
		BufferGeometry.call( this );
  
		this.type = 'SphereBufferGeometry';
  
		this.parameters = {
			radius: radius,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			phiStart: phiStart,
			phiLength: phiLength,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		radius = radius || 1;
  
		widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
		heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );
  
		phiStart = phiStart !== undefined ? phiStart : 0;
		phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;
  
		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;
  
		var thetaEnd = thetaStart + thetaLength;
  
		var ix, iy;
  
		var index = 0;
		var grid = [];
  
		var vertex = new Vector3();
		var normal = new Vector3();
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// generate vertices, normals and uvs
  
		for ( iy = 0; iy <= heightSegments; iy ++ ) {
  
			var verticesRow = [];
  
			var v = iy / heightSegments;
  
			for ( ix = 0; ix <= widthSegments; ix ++ ) {
  
				var u = ix / widthSegments;
  
				// vertex
  
				vertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
				vertex.y = radius * Math.cos( thetaStart + v * thetaLength );
				vertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// normal
  
				normal.set( vertex.x, vertex.y, vertex.z ).normalize();
				normals.push( normal.x, normal.y, normal.z );
  
				// uv
  
				uvs.push( u, 1 - v );
  
				verticesRow.push( index ++ );
  
			}
  
			grid.push( verticesRow );
  
		}
  
		// indices
  
		for ( iy = 0; iy < heightSegments; iy ++ ) {
  
			for ( ix = 0; ix < widthSegments; ix ++ ) {
  
				var a = grid[ iy ][ ix + 1 ];
				var b = grid[ iy ][ ix ];
				var c = grid[ iy + 1 ][ ix ];
				var d = grid[ iy + 1 ][ ix + 1 ];
  
				if ( iy !== 0 || thetaStart > 0 ) indices.push( a, b, d );
				if ( iy !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	SphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	SphereBufferGeometry.prototype.constructor = SphereBufferGeometry;
  
	/**
	 * @author Kaleb Murphy
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// RingGeometry
  
	function RingGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {
  
		Geometry.call( this );
  
		this.type = 'RingGeometry';
  
		this.parameters = {
			innerRadius: innerRadius,
			outerRadius: outerRadius,
			thetaSegments: thetaSegments,
			phiSegments: phiSegments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		this.fromBufferGeometry( new RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) );
		this.mergeVertices();
  
	}
  
	RingGeometry.prototype = Object.create( Geometry.prototype );
	RingGeometry.prototype.constructor = RingGeometry;
  
	// RingBufferGeometry
  
	function RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {
  
		BufferGeometry.call( this );
  
		this.type = 'RingBufferGeometry';
  
		this.parameters = {
			innerRadius: innerRadius,
			outerRadius: outerRadius,
			thetaSegments: thetaSegments,
			phiSegments: phiSegments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		innerRadius = innerRadius || 0.5;
		outerRadius = outerRadius || 1;
  
		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
  
		thetaSegments = thetaSegments !== undefined ? Math.max( 3, thetaSegments ) : 8;
		phiSegments = phiSegments !== undefined ? Math.max( 1, phiSegments ) : 1;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// some helper variables
  
		var segment;
		var radius = innerRadius;
		var radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );
		var vertex = new Vector3();
		var uv = new Vector2();
		var j, i;
  
		// generate vertices, normals and uvs
  
		for ( j = 0; j <= phiSegments; j ++ ) {
  
			for ( i = 0; i <= thetaSegments; i ++ ) {
  
				// values are generate from the inside of the ring to the outside
  
				segment = thetaStart + i / thetaSegments * thetaLength;
  
				// vertex
  
				vertex.x = radius * Math.cos( segment );
				vertex.y = radius * Math.sin( segment );
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// normal
  
				normals.push( 0, 0, 1 );
  
				// uv
  
				uv.x = ( vertex.x / outerRadius + 1 ) / 2;
				uv.y = ( vertex.y / outerRadius + 1 ) / 2;
  
				uvs.push( uv.x, uv.y );
  
			}
  
			// increase the radius for next row of vertices
  
			radius += radiusStep;
  
		}
  
		// indices
  
		for ( j = 0; j < phiSegments; j ++ ) {
  
			var thetaSegmentLevel = j * ( thetaSegments + 1 );
  
			for ( i = 0; i < thetaSegments; i ++ ) {
  
				segment = i + thetaSegmentLevel;
  
				var a = segment;
				var b = segment + thetaSegments + 1;
				var c = segment + thetaSegments + 2;
				var d = segment + 1;
  
				// faces
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	RingBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	RingBufferGeometry.prototype.constructor = RingBufferGeometry;
  
	/**
	 * @author astrodud / http://astrodud.isgreat.org/
	 * @author zz85 / https://github.com/zz85
	 * @author bhouston / http://clara.io
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// LatheGeometry
  
	function LatheGeometry( points, segments, phiStart, phiLength ) {
  
		Geometry.call( this );
  
		this.type = 'LatheGeometry';
  
		this.parameters = {
			points: points,
			segments: segments,
			phiStart: phiStart,
			phiLength: phiLength
		};
  
		this.fromBufferGeometry( new LatheBufferGeometry( points, segments, phiStart, phiLength ) );
		this.mergeVertices();
  
	}
  
	LatheGeometry.prototype = Object.create( Geometry.prototype );
	LatheGeometry.prototype.constructor = LatheGeometry;
  
	// LatheBufferGeometry
  
	function LatheBufferGeometry( points, segments, phiStart, phiLength ) {
  
		BufferGeometry.call( this );
  
		this.type = 'LatheBufferGeometry';
  
		this.parameters = {
			points: points,
			segments: segments,
			phiStart: phiStart,
			phiLength: phiLength
		};
  
		segments = Math.floor( segments ) || 12;
		phiStart = phiStart || 0;
		phiLength = phiLength || Math.PI * 2;
  
		// clamp phiLength so it's in range of [ 0, 2PI ]
  
		phiLength = _Math.clamp( phiLength, 0, Math.PI * 2 );
  
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var uvs = [];
  
		// helper variables
  
		var base;
		var inverseSegments = 1.0 / segments;
		var vertex = new Vector3();
		var uv = new Vector2();
		var i, j;
  
		// generate vertices and uvs
  
		for ( i = 0; i <= segments; i ++ ) {
  
			var phi = phiStart + i * inverseSegments * phiLength;
  
			var sin = Math.sin( phi );
			var cos = Math.cos( phi );
  
			for ( j = 0; j <= ( points.length - 1 ); j ++ ) {
  
				// vertex
  
				vertex.x = points[ j ].x * sin;
				vertex.y = points[ j ].y;
				vertex.z = points[ j ].x * cos;
  
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// uv
  
				uv.x = i / segments;
				uv.y = j / ( points.length - 1 );
  
				uvs.push( uv.x, uv.y );
  
  
			}
  
		}
  
		// indices
  
		for ( i = 0; i < segments; i ++ ) {
  
			for ( j = 0; j < ( points.length - 1 ); j ++ ) {
  
				base = j + i * points.length;
  
				var a = base;
				var b = base + points.length;
				var c = base + points.length + 1;
				var d = base + 1;
  
				// faces
  
				indices.push( a, b, d );
				indices.push( b, c, d );
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
		// generate normals
  
		this.computeVertexNormals();
  
		// if the geometry is closed, we need to average the normals along the seam.
		// because the corresponding vertices are identical (but still have different UVs).
  
		if ( phiLength === Math.PI * 2 ) {
  
			var normals = this.attributes.normal.array;
			var n1 = new Vector3();
			var n2 = new Vector3();
			var n = new Vector3();
  
			// this is the buffer offset for the last line of vertices
  
			base = segments * points.length * 3;
  
			for ( i = 0, j = 0; i < points.length; i ++, j += 3 ) {
  
				// select the normal of the vertex in the first line
  
				n1.x = normals[ j + 0 ];
				n1.y = normals[ j + 1 ];
				n1.z = normals[ j + 2 ];
  
				// select the normal of the vertex in the last line
  
				n2.x = normals[ base + j + 0 ];
				n2.y = normals[ base + j + 1 ];
				n2.z = normals[ base + j + 2 ];
  
				// average normals
  
				n.addVectors( n1, n2 ).normalize();
  
				// assign the new values to both normals
  
				normals[ j + 0 ] = normals[ base + j + 0 ] = n.x;
				normals[ j + 1 ] = normals[ base + j + 1 ] = n.y;
				normals[ j + 2 ] = normals[ base + j + 2 ] = n.z;
  
			}
  
		}
  
	}
  
	LatheBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	LatheBufferGeometry.prototype.constructor = LatheBufferGeometry;
  
	/**
	 * @author jonobr1 / http://jonobr1.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// ShapeGeometry
  
	function ShapeGeometry( shapes, curveSegments ) {
  
		Geometry.call( this );
  
		this.type = 'ShapeGeometry';
  
		if ( typeof curveSegments === 'object' ) {
  
			console.warn( 'THREE.ShapeGeometry: Options parameter has been removed.' );
  
			curveSegments = curveSegments.curveSegments;
  
		}
  
		this.parameters = {
			shapes: shapes,
			curveSegments: curveSegments
		};
  
		this.fromBufferGeometry( new ShapeBufferGeometry( shapes, curveSegments ) );
		this.mergeVertices();
  
	}
  
	ShapeGeometry.prototype = Object.create( Geometry.prototype );
	ShapeGeometry.prototype.constructor = ShapeGeometry;
  
	ShapeGeometry.prototype.toJSON = function () {
  
		var data = Geometry.prototype.toJSON.call( this );
  
		var shapes = this.parameters.shapes;
  
		return toJSON$1( shapes, data );
  
	};
  
	// ShapeBufferGeometry
  
	function ShapeBufferGeometry( shapes, curveSegments ) {
  
		BufferGeometry.call( this );
  
		this.type = 'ShapeBufferGeometry';
  
		this.parameters = {
			shapes: shapes,
			curveSegments: curveSegments
		};
  
		curveSegments = curveSegments || 12;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var groupStart = 0;
		var groupCount = 0;
  
		// allow single and array values for "shapes" parameter
  
		if ( Array.isArray( shapes ) === false ) {
  
			addShape( shapes );
  
		} else {
  
			for ( var i = 0; i < shapes.length; i ++ ) {
  
				addShape( shapes[ i ] );
  
				this.addGroup( groupStart, groupCount, i ); // enables MultiMaterial support
  
				groupStart += groupCount;
				groupCount = 0;
  
			}
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
  
		// helper functions
  
		function addShape( shape ) {
  
			var i, l, shapeHole;
  
			var indexOffset = vertices.length / 3;
			var points = shape.extractPoints( curveSegments );
  
			var shapeVertices = points.shape;
			var shapeHoles = points.holes;
  
			// check direction of vertices
  
			if ( ShapeUtils.isClockWise( shapeVertices ) === false ) {
  
				shapeVertices = shapeVertices.reverse();
  
				// also check if holes are in the opposite direction
  
				for ( i = 0, l = shapeHoles.length; i < l; i ++ ) {
  
					shapeHole = shapeHoles[ i ];
  
					if ( ShapeUtils.isClockWise( shapeHole ) === true ) {
  
						shapeHoles[ i ] = shapeHole.reverse();
  
					}
  
				}
  
			}
  
			var faces = ShapeUtils.triangulateShape( shapeVertices, shapeHoles );
  
			// join vertices of inner and outer paths to a single array
  
			for ( i = 0, l = shapeHoles.length; i < l; i ++ ) {
  
				shapeHole = shapeHoles[ i ];
				shapeVertices = shapeVertices.concat( shapeHole );
  
			}
  
			// vertices, normals, uvs
  
			for ( i = 0, l = shapeVertices.length; i < l; i ++ ) {
  
				var vertex = shapeVertices[ i ];
  
				vertices.push( vertex.x, vertex.y, 0 );
				normals.push( 0, 0, 1 );
				uvs.push( vertex.x, vertex.y ); // world uvs
  
			}
  
			// incides
  
			for ( i = 0, l = faces.length; i < l; i ++ ) {
  
				var face = faces[ i ];
  
				var a = face[ 0 ] + indexOffset;
				var b = face[ 1 ] + indexOffset;
				var c = face[ 2 ] + indexOffset;
  
				indices.push( a, b, c );
				groupCount += 3;
  
			}
  
		}
  
	}
  
	ShapeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ShapeBufferGeometry.prototype.constructor = ShapeBufferGeometry;
  
	ShapeBufferGeometry.prototype.toJSON = function () {
  
		var data = BufferGeometry.prototype.toJSON.call( this );
  
		var shapes = this.parameters.shapes;
  
		return toJSON$1( shapes, data );
  
	};
  
	//
  
	function toJSON$1( shapes, data ) {
  
		data.shapes = [];
  
		if ( Array.isArray( shapes ) ) {
  
			for ( var i = 0, l = shapes.length; i < l; i ++ ) {
  
				var shape = shapes[ i ];
  
				data.shapes.push( shape.uuid );
  
			}
  
		} else {
  
			data.shapes.push( shapes.uuid );
  
		}
  
		return data;
  
	}
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function EdgesGeometry( geometry, thresholdAngle ) {
  
		BufferGeometry.call( this );
  
		this.type = 'EdgesGeometry';
  
		this.parameters = {
			thresholdAngle: thresholdAngle
		};
  
		thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;
  
		// buffer
  
		var vertices = [];
  
		// helper variables
  
		var thresholdDot = Math.cos( _Math.DEG2RAD * thresholdAngle );
		var edge = [ 0, 0 ], edges = {}, edge1, edge2;
		var key, keys = [ 'a', 'b', 'c' ];
  
		// prepare source geometry
  
		var geometry2;
  
		if ( geometry.isBufferGeometry ) {
  
			geometry2 = new Geometry();
			geometry2.fromBufferGeometry( geometry );
  
		} else {
  
			geometry2 = geometry.clone();
  
		}
  
		geometry2.mergeVertices();
		geometry2.computeFaceNormals();
  
		var sourceVertices = geometry2.vertices;
		var faces = geometry2.faces;
  
		// now create a data structure where each entry represents an edge with its adjoining faces
  
		for ( var i = 0, l = faces.length; i < l; i ++ ) {
  
			var face = faces[ i ];
  
			for ( var j = 0; j < 3; j ++ ) {
  
				edge1 = face[ keys[ j ] ];
				edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
				edge[ 0 ] = Math.min( edge1, edge2 );
				edge[ 1 ] = Math.max( edge1, edge2 );
  
				key = edge[ 0 ] + ',' + edge[ 1 ];
  
				if ( edges[ key ] === undefined ) {
  
					edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ], face1: i, face2: undefined };
  
				} else {
  
					edges[ key ].face2 = i;
  
				}
  
			}
  
		}
  
		// generate vertices
  
		for ( key in edges ) {
  
			var e = edges[ key ];
  
			// an edge is only rendered if the angle (in degrees) between the face normals of the adjoining faces exceeds this value. default = 1 degree.
  
			if ( e.face2 === undefined || faces[ e.face1 ].normal.dot( faces[ e.face2 ].normal ) <= thresholdDot ) {
  
				var vertex = sourceVertices[ e.index1 ];
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				vertex = sourceVertices[ e.index2 ];
				vertices.push( vertex.x, vertex.y, vertex.z );
  
			}
  
		}
  
		// build geometry
  
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
  
	}
  
	EdgesGeometry.prototype = Object.create( BufferGeometry.prototype );
	EdgesGeometry.prototype.constructor = EdgesGeometry;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	// CylinderGeometry
  
	function CylinderGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {
  
		Geometry.call( this );
  
		this.type = 'CylinderGeometry';
  
		this.parameters = {
			radiusTop: radiusTop,
			radiusBottom: radiusBottom,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		this.fromBufferGeometry( new CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) );
		this.mergeVertices();
  
	}
  
	CylinderGeometry.prototype = Object.create( Geometry.prototype );
	CylinderGeometry.prototype.constructor = CylinderGeometry;
  
	// CylinderBufferGeometry
  
	function CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {
  
		BufferGeometry.call( this );
  
		this.type = 'CylinderBufferGeometry';
  
		this.parameters = {
			radiusTop: radiusTop,
			radiusBottom: radiusBottom,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		var scope = this;
  
		radiusTop = radiusTop !== undefined ? radiusTop : 1;
		radiusBottom = radiusBottom !== undefined ? radiusBottom : 1;
		height = height || 1;
  
		radialSegments = Math.floor( radialSegments ) || 8;
		heightSegments = Math.floor( heightSegments ) || 1;
  
		openEnded = openEnded !== undefined ? openEnded : false;
		thetaStart = thetaStart !== undefined ? thetaStart : 0.0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var index = 0;
		var indexArray = [];
		var halfHeight = height / 2;
		var groupStart = 0;
  
		// generate geometry
  
		generateTorso();
  
		if ( openEnded === false ) {
  
			if ( radiusTop > 0 ) generateCap( true );
			if ( radiusBottom > 0 ) generateCap( false );
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
		function generateTorso() {
  
			var x, y;
			var normal = new Vector3();
			var vertex = new Vector3();
  
			var groupCount = 0;
  
			// this will be used to calculate the normal
			var slope = ( radiusBottom - radiusTop ) / height;
  
			// generate vertices, normals and uvs
  
			for ( y = 0; y <= heightSegments; y ++ ) {
  
				var indexRow = [];
  
				var v = y / heightSegments;
  
				// calculate the radius of the current row
  
				var radius = v * ( radiusBottom - radiusTop ) + radiusTop;
  
				for ( x = 0; x <= radialSegments; x ++ ) {
  
					var u = x / radialSegments;
  
					var theta = u * thetaLength + thetaStart;
  
					var sinTheta = Math.sin( theta );
					var cosTheta = Math.cos( theta );
  
					// vertex
  
					vertex.x = radius * sinTheta;
					vertex.y = - v * height + halfHeight;
					vertex.z = radius * cosTheta;
					vertices.push( vertex.x, vertex.y, vertex.z );
  
					// normal
  
					normal.set( sinTheta, slope, cosTheta ).normalize();
					normals.push( normal.x, normal.y, normal.z );
  
					// uv
  
					uvs.push( u, 1 - v );
  
					// save index of vertex in respective row
  
					indexRow.push( index ++ );
  
				}
  
				// now save vertices of the row in our index array
  
				indexArray.push( indexRow );
  
			}
  
			// generate indices
  
			for ( x = 0; x < radialSegments; x ++ ) {
  
				for ( y = 0; y < heightSegments; y ++ ) {
  
					// we use the index array to access the correct indices
  
					var a = indexArray[ y ][ x ];
					var b = indexArray[ y + 1 ][ x ];
					var c = indexArray[ y + 1 ][ x + 1 ];
					var d = indexArray[ y ][ x + 1 ];
  
					// faces
  
					indices.push( a, b, d );
					indices.push( b, c, d );
  
					// update group counter
  
					groupCount += 6;
  
				}
  
			}
  
			// add a group to the geometry. this will ensure multi material support
  
			scope.addGroup( groupStart, groupCount, 0 );
  
			// calculate new start value for groups
  
			groupStart += groupCount;
  
		}
  
		function generateCap( top ) {
  
			var x, centerIndexStart, centerIndexEnd;
  
			var uv = new Vector2();
			var vertex = new Vector3();
  
			var groupCount = 0;
  
			var radius = ( top === true ) ? radiusTop : radiusBottom;
			var sign = ( top === true ) ? 1 : - 1;
  
			// save the index of the first center vertex
			centerIndexStart = index;
  
			// first we generate the center vertex data of the cap.
			// because the geometry needs one set of uvs per face,
			// we must generate a center vertex per face/segment
  
			for ( x = 1; x <= radialSegments; x ++ ) {
  
				// vertex
  
				vertices.push( 0, halfHeight * sign, 0 );
  
				// normal
  
				normals.push( 0, sign, 0 );
  
				// uv
  
				uvs.push( 0.5, 0.5 );
  
				// increase index
  
				index ++;
  
			}
  
			// save the index of the last center vertex
  
			centerIndexEnd = index;
  
			// now we generate the surrounding vertices, normals and uvs
  
			for ( x = 0; x <= radialSegments; x ++ ) {
  
				var u = x / radialSegments;
				var theta = u * thetaLength + thetaStart;
  
				var cosTheta = Math.cos( theta );
				var sinTheta = Math.sin( theta );
  
				// vertex
  
				vertex.x = radius * sinTheta;
				vertex.y = halfHeight * sign;
				vertex.z = radius * cosTheta;
				vertices.push( vertex.x, vertex.y, vertex.z );
  
				// normal
  
				normals.push( 0, sign, 0 );
  
				// uv
  
				uv.x = ( cosTheta * 0.5 ) + 0.5;
				uv.y = ( sinTheta * 0.5 * sign ) + 0.5;
				uvs.push( uv.x, uv.y );
  
				// increase index
  
				index ++;
  
			}
  
			// generate indices
  
			for ( x = 0; x < radialSegments; x ++ ) {
  
				var c = centerIndexStart + x;
				var i = centerIndexEnd + x;
  
				if ( top === true ) {
  
					// face top
  
					indices.push( i, i + 1, c );
  
				} else {
  
					// face bottom
  
					indices.push( i + 1, i, c );
  
				}
  
				groupCount += 3;
  
			}
  
			// add a group to the geometry. this will ensure multi material support
  
			scope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );
  
			// calculate new start value for groups
  
			groupStart += groupCount;
  
		}
  
	}
  
	CylinderBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	CylinderBufferGeometry.prototype.constructor = CylinderBufferGeometry;
  
	/**
	 * @author abelnation / http://github.com/abelnation
	 */
  
	// ConeGeometry
  
	function ConeGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {
  
		CylinderGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );
  
		this.type = 'ConeGeometry';
  
		this.parameters = {
			radius: radius,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
	}
  
	ConeGeometry.prototype = Object.create( CylinderGeometry.prototype );
	ConeGeometry.prototype.constructor = ConeGeometry;
  
	// ConeBufferGeometry
  
	function ConeBufferGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {
  
		CylinderBufferGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );
  
		this.type = 'ConeBufferGeometry';
  
		this.parameters = {
			radius: radius,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
	}
  
	ConeBufferGeometry.prototype = Object.create( CylinderBufferGeometry.prototype );
	ConeBufferGeometry.prototype.constructor = ConeBufferGeometry;
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 * @author Mugen87 / https://github.com/Mugen87
	 * @author hughes
	 */
  
	// CircleGeometry
  
	function CircleGeometry( radius, segments, thetaStart, thetaLength ) {
  
		Geometry.call( this );
  
		this.type = 'CircleGeometry';
  
		this.parameters = {
			radius: radius,
			segments: segments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		this.fromBufferGeometry( new CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );
		this.mergeVertices();
  
	}
  
	CircleGeometry.prototype = Object.create( Geometry.prototype );
	CircleGeometry.prototype.constructor = CircleGeometry;
  
	// CircleBufferGeometry
  
	function CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) {
  
		BufferGeometry.call( this );
  
		this.type = 'CircleBufferGeometry';
  
		this.parameters = {
			radius: radius,
			segments: segments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};
  
		radius = radius || 1;
		segments = segments !== undefined ? Math.max( 3, segments ) : 8;
  
		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
  
		// buffers
  
		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];
  
		// helper variables
  
		var i, s;
		var vertex = new Vector3();
		var uv = new Vector2();
  
		// center point
  
		vertices.push( 0, 0, 0 );
		normals.push( 0, 0, 1 );
		uvs.push( 0.5, 0.5 );
  
		for ( s = 0, i = 3; s <= segments; s ++, i += 3 ) {
  
			var segment = thetaStart + s / segments * thetaLength;
  
			// vertex
  
			vertex.x = radius * Math.cos( segment );
			vertex.y = radius * Math.sin( segment );
  
			vertices.push( vertex.x, vertex.y, vertex.z );
  
			// normal
  
			normals.push( 0, 0, 1 );
  
			// uvs
  
			uv.x = ( vertices[ i ] / radius + 1 ) / 2;
			uv.y = ( vertices[ i + 1 ] / radius + 1 ) / 2;
  
			uvs.push( uv.x, uv.y );
  
		}
  
		// indices
  
		for ( i = 1; i <= segments; i ++ ) {
  
			indices.push( i, i + 1, 0 );
  
		}
  
		// build geometry
  
		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
  
	}
  
	CircleBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	CircleBufferGeometry.prototype.constructor = CircleBufferGeometry;
  
  
  
	var Geometries = /*#__PURE__*/Object.freeze({
		WireframeGeometry: WireframeGeometry,
		ParametricGeometry: ParametricGeometry,
		ParametricBufferGeometry: ParametricBufferGeometry,
		TetrahedronGeometry: TetrahedronGeometry,
		TetrahedronBufferGeometry: TetrahedronBufferGeometry,
		OctahedronGeometry: OctahedronGeometry,
		OctahedronBufferGeometry: OctahedronBufferGeometry,
		IcosahedronGeometry: IcosahedronGeometry,
		IcosahedronBufferGeometry: IcosahedronBufferGeometry,
		DodecahedronGeometry: DodecahedronGeometry,
		DodecahedronBufferGeometry: DodecahedronBufferGeometry,
		PolyhedronGeometry: PolyhedronGeometry,
		PolyhedronBufferGeometry: PolyhedronBufferGeometry,
		TubeGeometry: TubeGeometry,
		TubeBufferGeometry: TubeBufferGeometry,
		TorusKnotGeometry: TorusKnotGeometry,
		TorusKnotBufferGeometry: TorusKnotBufferGeometry,
		TorusGeometry: TorusGeometry,
		TorusBufferGeometry: TorusBufferGeometry,
		TextGeometry: TextGeometry,
		TextBufferGeometry: TextBufferGeometry,
		SphereGeometry: SphereGeometry,
		SphereBufferGeometry: SphereBufferGeometry,
		RingGeometry: RingGeometry,
		RingBufferGeometry: RingBufferGeometry,
		PlaneGeometry: PlaneGeometry,
		PlaneBufferGeometry: PlaneBufferGeometry,
		LatheGeometry: LatheGeometry,
		LatheBufferGeometry: LatheBufferGeometry,
		ShapeGeometry: ShapeGeometry,
		ShapeBufferGeometry: ShapeBufferGeometry,
		ExtrudeGeometry: ExtrudeGeometry,
		ExtrudeBufferGeometry: ExtrudeBufferGeometry,
		EdgesGeometry: EdgesGeometry,
		ConeGeometry: ConeGeometry,
		ConeBufferGeometry: ConeBufferGeometry,
		CylinderGeometry: CylinderGeometry,
		CylinderBufferGeometry: CylinderBufferGeometry,
		CircleGeometry: CircleGeometry,
		CircleBufferGeometry: CircleBufferGeometry,
		BoxGeometry: BoxGeometry,
		BoxBufferGeometry: BoxBufferGeometry
	});
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 *
	 * parameters = {
	 *  color: <THREE.Color>
	 * }
	 */
  
	function ShadowMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'ShadowMaterial';
  
		this.color = new Color( 0x000000 );
		this.transparent = true;
  
		this.setValues( parameters );
  
	}
  
	ShadowMaterial.prototype = Object.create( Material.prototype );
	ShadowMaterial.prototype.constructor = ShadowMaterial;
  
	ShadowMaterial.prototype.isShadowMaterial = true;
  
	ShadowMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
  
		return this;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function RawShaderMaterial( parameters ) {
  
		ShaderMaterial.call( this, parameters );
  
		this.type = 'RawShaderMaterial';
  
	}
  
	RawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );
	RawShaderMaterial.prototype.constructor = RawShaderMaterial;
  
	RawShaderMaterial.prototype.isRawShaderMaterial = true;
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  roughness: <float>,
	 *  metalness: <float>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  roughnessMap: new THREE.Texture( <Image> ),
	 *
	 *  metalnessMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *  envMapIntensity: <float>
	 *
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */
  
	function MeshStandardMaterial( parameters ) {
  
		Material.call( this );
  
		this.defines = { 'STANDARD': '' };
  
		this.type = 'MeshStandardMaterial';
  
		this.color = new Color( 0xffffff ); // diffuse
		this.roughness = 0.5;
		this.metalness = 0.5;
  
		this.map = null;
  
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
  
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
  
		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
  
		this.bumpMap = null;
		this.bumpScale = 1;
  
		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );
  
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
  
		this.roughnessMap = null;
  
		this.metalnessMap = null;
  
		this.alphaMap = null;
  
		this.envMap = null;
		this.envMapIntensity = 1.0;
  
		this.refractionRatio = 0.98;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
  
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
  
		this.setValues( parameters );
  
	}
  
	MeshStandardMaterial.prototype = Object.create( Material.prototype );
	MeshStandardMaterial.prototype.constructor = MeshStandardMaterial;
  
	MeshStandardMaterial.prototype.isMeshStandardMaterial = true;
  
	MeshStandardMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.defines = { 'STANDARD': '' };
  
		this.color.copy( source.color );
		this.roughness = source.roughness;
		this.metalness = source.metalness;
  
		this.map = source.map;
  
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
  
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
  
		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
  
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
  
		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );
  
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
  
		this.roughnessMap = source.roughnessMap;
  
		this.metalnessMap = source.metalnessMap;
  
		this.alphaMap = source.alphaMap;
  
		this.envMap = source.envMap;
		this.envMapIntensity = source.envMapIntensity;
  
		this.refractionRatio = source.refractionRatio;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
  
		return this;
  
	};
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  reflectivity: <float>
	 * }
	 */
  
	function MeshPhysicalMaterial( parameters ) {
  
		MeshStandardMaterial.call( this );
  
		this.defines = { 'PHYSICAL': '' };
  
		this.type = 'MeshPhysicalMaterial';
  
		this.reflectivity = 0.5; // maps to F0 = 0.04
  
		this.clearCoat = 0.0;
		this.clearCoatRoughness = 0.0;
  
		this.setValues( parameters );
  
	}
  
	MeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );
	MeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;
  
	MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;
  
	MeshPhysicalMaterial.prototype.copy = function ( source ) {
  
		MeshStandardMaterial.prototype.copy.call( this, source );
  
		this.defines = { 'PHYSICAL': '' };
  
		this.reflectivity = source.reflectivity;
  
		this.clearCoat = source.clearCoat;
		this.clearCoatRoughness = source.clearCoatRoughness;
  
		return this;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  specular: <hex>,
	 *  shininess: <float>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */
  
	function MeshPhongMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshPhongMaterial';
  
		this.color = new Color( 0xffffff ); // diffuse
		this.specular = new Color( 0x111111 );
		this.shininess = 30;
  
		this.map = null;
  
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
  
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
  
		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
  
		this.bumpMap = null;
		this.bumpScale = 1;
  
		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );
  
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
  
		this.specularMap = null;
  
		this.alphaMap = null;
  
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
  
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
  
		this.setValues( parameters );
  
	}
  
	MeshPhongMaterial.prototype = Object.create( Material.prototype );
	MeshPhongMaterial.prototype.constructor = MeshPhongMaterial;
  
	MeshPhongMaterial.prototype.isMeshPhongMaterial = true;
  
	MeshPhongMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
		this.specular.copy( source.specular );
		this.shininess = source.shininess;
  
		this.map = source.map;
  
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
  
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
  
		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
  
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
  
		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );
  
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
  
		this.specularMap = source.specularMap;
  
		this.alphaMap = source.alphaMap;
  
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
  
		return this;
  
	};
  
	/**
	 * @author takahirox / http://github.com/takahirox
	 *
	 * parameters = {
	 *  gradientMap: new THREE.Texture( <Image> )
	 * }
	 */
  
	function MeshToonMaterial( parameters ) {
  
		MeshPhongMaterial.call( this );
  
		this.defines = { 'TOON': '' };
  
		this.type = 'MeshToonMaterial';
  
		this.gradientMap = null;
  
		this.setValues( parameters );
  
	}
  
	MeshToonMaterial.prototype = Object.create( MeshPhongMaterial.prototype );
	MeshToonMaterial.prototype.constructor = MeshToonMaterial;
  
	MeshToonMaterial.prototype.isMeshToonMaterial = true;
  
	MeshToonMaterial.prototype.copy = function ( source ) {
  
		MeshPhongMaterial.prototype.copy.call( this, source );
  
		this.gradientMap = source.gradientMap;
  
		return this;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  opacity: <float>,
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */
  
	function MeshNormalMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshNormalMaterial';
  
		this.bumpMap = null;
		this.bumpScale = 1;
  
		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );
  
		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
  
		this.fog = false;
		this.lights = false;
  
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
  
		this.setValues( parameters );
  
	}
  
	MeshNormalMaterial.prototype = Object.create( Material.prototype );
	MeshNormalMaterial.prototype.constructor = MeshNormalMaterial;
  
	MeshNormalMaterial.prototype.isMeshNormalMaterial = true;
  
	MeshNormalMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;
  
		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );
  
		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
  
		return this;
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */
  
	function MeshLambertMaterial( parameters ) {
  
		Material.call( this );
  
		this.type = 'MeshLambertMaterial';
  
		this.color = new Color( 0xffffff ); // diffuse
  
		this.map = null;
  
		this.lightMap = null;
		this.lightMapIntensity = 1.0;
  
		this.aoMap = null;
		this.aoMapIntensity = 1.0;
  
		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;
  
		this.specularMap = null;
  
		this.alphaMap = null;
  
		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;
  
		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';
  
		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;
  
		this.setValues( parameters );
  
	}
  
	MeshLambertMaterial.prototype = Object.create( Material.prototype );
	MeshLambertMaterial.prototype.constructor = MeshLambertMaterial;
  
	MeshLambertMaterial.prototype.isMeshLambertMaterial = true;
  
	MeshLambertMaterial.prototype.copy = function ( source ) {
  
		Material.prototype.copy.call( this, source );
  
		this.color.copy( source.color );
  
		this.map = source.map;
  
		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;
  
		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;
  
		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;
  
		this.specularMap = source.specularMap;
  
		this.alphaMap = source.alphaMap;
  
		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;
  
		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;
  
		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;
  
		return this;
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  linewidth: <float>,
	 *
	 *  scale: <float>,
	 *  dashSize: <float>,
	 *  gapSize: <float>
	 * }
	 */
  
	function LineDashedMaterial( parameters ) {
  
		LineBasicMaterial.call( this );
  
		this.type = 'LineDashedMaterial';
  
		this.scale = 1;
		this.dashSize = 3;
		this.gapSize = 1;
  
		this.setValues( parameters );
  
	}
  
	LineDashedMaterial.prototype = Object.create( LineBasicMaterial.prototype );
	LineDashedMaterial.prototype.constructor = LineDashedMaterial;
  
	LineDashedMaterial.prototype.isLineDashedMaterial = true;
  
	LineDashedMaterial.prototype.copy = function ( source ) {
  
		LineBasicMaterial.prototype.copy.call( this, source );
  
		this.scale = source.scale;
		this.dashSize = source.dashSize;
		this.gapSize = source.gapSize;
  
		return this;
  
	};
  
  
  
	var Materials = /*#__PURE__*/Object.freeze({
		ShadowMaterial: ShadowMaterial,
		SpriteMaterial: SpriteMaterial,
		RawShaderMaterial: RawShaderMaterial,
		ShaderMaterial: ShaderMaterial,
		PointsMaterial: PointsMaterial,
		MeshPhysicalMaterial: MeshPhysicalMaterial,
		MeshStandardMaterial: MeshStandardMaterial,
		MeshPhongMaterial: MeshPhongMaterial,
		MeshToonMaterial: MeshToonMaterial,
		MeshNormalMaterial: MeshNormalMaterial,
		MeshLambertMaterial: MeshLambertMaterial,
		MeshDepthMaterial: MeshDepthMaterial,
		MeshDistanceMaterial: MeshDistanceMaterial,
		MeshBasicMaterial: MeshBasicMaterial,
		LineDashedMaterial: LineDashedMaterial,
		LineBasicMaterial: LineBasicMaterial,
		Material: Material
	});
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var Cache = {
  
		enabled: false,
  
		files: {},
  
		add: function ( key, file ) {
  
			if ( this.enabled === false ) return;
  
			// console.log( 'THREE.Cache', 'Adding key:', key );
  
			this.files[ key ] = file;
  
		},
  
		get: function ( key ) {
  
			if ( this.enabled === false ) return;
  
			// console.log( 'THREE.Cache', 'Checking key:', key );
  
			return this.files[ key ];
  
		},
  
		remove: function ( key ) {
  
			delete this.files[ key ];
  
		},
  
		clear: function () {
  
			this.files = {};
  
		}
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function LoadingManager( onLoad, onProgress, onError ) {
  
		var scope = this;
  
		var isLoading = false;
		var itemsLoaded = 0;
		var itemsTotal = 0;
		var urlModifier = undefined;
  
		this.onStart = undefined;
		this.onLoad = onLoad;
		this.onProgress = onProgress;
		this.onError = onError;
  
		this.itemStart = function ( url ) {
  
			itemsTotal ++;
  
			if ( isLoading === false ) {
  
				if ( scope.onStart !== undefined ) {
  
					scope.onStart( url, itemsLoaded, itemsTotal );
  
				}
  
			}
  
			isLoading = true;
  
		};
  
		this.itemEnd = function ( url ) {
  
			itemsLoaded ++;
  
			if ( scope.onProgress !== undefined ) {
  
				scope.onProgress( url, itemsLoaded, itemsTotal );
  
			}
  
			if ( itemsLoaded === itemsTotal ) {
  
				isLoading = false;
  
				if ( scope.onLoad !== undefined ) {
  
					scope.onLoad();
  
				}
  
			}
  
		};
  
		this.itemError = function ( url ) {
  
			if ( scope.onError !== undefined ) {
  
				scope.onError( url );
  
			}
  
		};
  
		this.resolveURL = function ( url ) {
  
			if ( urlModifier ) {
  
				return urlModifier( url );
  
			}
  
			return url;
  
		};
  
		this.setURLModifier = function ( transform ) {
  
			urlModifier = transform;
			return this;
  
		};
  
	}
  
	var DefaultLoadingManager = new LoadingManager();
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var loading = {};
  
	function FileLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( FileLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			if ( url === undefined ) url = '';
  
			if ( this.path !== undefined ) url = this.path + url;
  
			url = this.manager.resolveURL( url );
  
			var scope = this;
  
			var cached = Cache.get( url );
  
			if ( cached !== undefined ) {
  
				scope.manager.itemStart( url );
  
				setTimeout( function () {
  
					if ( onLoad ) onLoad( cached );
  
					scope.manager.itemEnd( url );
  
				}, 0 );
  
				return cached;
  
			}
  
			// Check if request is duplicate
  
			if ( loading[ url ] !== undefined ) {
  
				loading[ url ].push( {
  
					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError
  
				} );
  
				return;
  
			}
  
			// Check for data: URI
			var dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;
			var dataUriRegexResult = url.match( dataUriRegex );
  
			// Safari can not handle Data URIs through XMLHttpRequest so process manually
			if ( dataUriRegexResult ) {
  
				var mimeType = dataUriRegexResult[ 1 ];
				var isBase64 = !! dataUriRegexResult[ 2 ];
				var data = dataUriRegexResult[ 3 ];
  
				data = window.decodeURIComponent( data );
  
				if ( isBase64 ) data = window.atob( data );
  
				try {
  
					var response;
					var responseType = ( this.responseType || '' ).toLowerCase();
  
					switch ( responseType ) {
  
						case 'arraybuffer':
						case 'blob':
  
							var view = new Uint8Array( data.length );
  
							for ( var i = 0; i < data.length; i ++ ) {
  
								view[ i ] = data.charCodeAt( i );
  
							}
  
							if ( responseType === 'blob' ) {
  
								response = new Blob( [ view.buffer ], { type: mimeType } );
  
							} else {
  
								response = view.buffer;
  
							}
  
							break;
  
						case 'document':
  
							var parser = new DOMParser();
							response = parser.parseFromString( data, mimeType );
  
							break;
  
						case 'json':
  
							response = JSON.parse( data );
  
							break;
  
						default: // 'text' or other
  
							response = data;
  
							break;
  
					}
  
					// Wait for next browser tick like standard XMLHttpRequest event dispatching does
					window.setTimeout( function () {
  
						if ( onLoad ) onLoad( response );
  
						scope.manager.itemEnd( url );
  
					}, 0 );
  
				} catch ( error ) {
  
					// Wait for next browser tick like standard XMLHttpRequest event dispatching does
					window.setTimeout( function () {
  
						if ( onError ) onError( error );
  
						scope.manager.itemEnd( url );
						scope.manager.itemError( url );
  
					}, 0 );
  
				}
  
			} else {
  
				// Initialise array for duplicate requests
  
				loading[ url ] = [];
  
				loading[ url ].push( {
  
					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError
  
				} );
  
				var request = new XMLHttpRequest();
  
				request.open( 'GET', url, true );
  
				request.addEventListener( 'load', function ( event ) {
  
					var response = this.response;
  
					Cache.add( url, response );
  
					var callbacks = loading[ url ];
  
					delete loading[ url ];
  
					if ( this.status === 200 || this.status === 0 ) {
  
						// Some browsers return HTTP Status 0 when using non-http protocol
						// e.g. 'file://' or 'data://'. Handle as success.
  
						if ( this.status === 0 ) console.warn( 'THREE.FileLoader: HTTP Status 0 received.' );
  
						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {
  
							var callback = callbacks[ i ];
							if ( callback.onLoad ) callback.onLoad( response );
  
						}
  
						scope.manager.itemEnd( url );
  
					} else {
  
						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {
  
							var callback = callbacks[ i ];
							if ( callback.onError ) callback.onError( event );
  
						}
  
						scope.manager.itemEnd( url );
						scope.manager.itemError( url );
  
					}
  
				}, false );
  
				request.addEventListener( 'progress', function ( event ) {
  
					var callbacks = loading[ url ];
  
					for ( var i = 0, il = callbacks.length; i < il; i ++ ) {
  
						var callback = callbacks[ i ];
						if ( callback.onProgress ) callback.onProgress( event );
  
					}
  
				}, false );
  
				request.addEventListener( 'error', function ( event ) {
  
					var callbacks = loading[ url ];
  
					delete loading[ url ];
  
					for ( var i = 0, il = callbacks.length; i < il; i ++ ) {
  
						var callback = callbacks[ i ];
						if ( callback.onError ) callback.onError( event );
  
					}
  
					scope.manager.itemEnd( url );
					scope.manager.itemError( url );
  
				}, false );
  
				if ( this.responseType !== undefined ) request.responseType = this.responseType;
				if ( this.withCredentials !== undefined ) request.withCredentials = this.withCredentials;
  
				if ( request.overrideMimeType ) request.overrideMimeType( this.mimeType !== undefined ? this.mimeType : 'text/plain' );
  
				for ( var header in this.requestHeader ) {
  
					request.setRequestHeader( header, this.requestHeader[ header ] );
  
				}
  
				request.send( null );
  
			}
  
			scope.manager.itemStart( url );
  
			return request;
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		},
  
		setResponseType: function ( value ) {
  
			this.responseType = value;
			return this;
  
		},
  
		setWithCredentials: function ( value ) {
  
			this.withCredentials = value;
			return this;
  
		},
  
		setMimeType: function ( value ) {
  
			this.mimeType = value;
			return this;
  
		},
  
		setRequestHeader: function ( value ) {
  
			this.requestHeader = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 *
	 * Abstract Base class to block based textures loader (dds, pvr, ...)
	 */
  
	function CompressedTextureLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
		// override in sub classes
		this._parser = null;
  
	}
  
	Object.assign( CompressedTextureLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var images = [];
  
			var texture = new CompressedTexture();
			texture.image = images;
  
			var loader = new FileLoader( this.manager );
			loader.setPath( this.path );
			loader.setResponseType( 'arraybuffer' );
  
			function loadTexture( i ) {
  
				loader.load( url[ i ], function ( buffer ) {
  
					var texDatas = scope._parser( buffer, true );
  
					images[ i ] = {
						width: texDatas.width,
						height: texDatas.height,
						format: texDatas.format,
						mipmaps: texDatas.mipmaps
					};
  
					loaded += 1;
  
					if ( loaded === 6 ) {
  
						if ( texDatas.mipmapCount === 1 )
							texture.minFilter = LinearFilter;
  
						texture.format = texDatas.format;
						texture.needsUpdate = true;
  
						if ( onLoad ) onLoad( texture );
  
					}
  
				}, onProgress, onError );
  
			}
  
			if ( Array.isArray( url ) ) {
  
				var loaded = 0;
  
				for ( var i = 0, il = url.length; i < il; ++ i ) {
  
					loadTexture( i );
  
				}
  
			} else {
  
				// compressed cubemap texture stored in a single DDS file
  
				loader.load( url, function ( buffer ) {
  
					var texDatas = scope._parser( buffer, true );
  
					if ( texDatas.isCubemap ) {
  
						var faces = texDatas.mipmaps.length / texDatas.mipmapCount;
  
						for ( var f = 0; f < faces; f ++ ) {
  
							images[ f ] = { mipmaps: [] };
  
							for ( var i = 0; i < texDatas.mipmapCount; i ++ ) {
  
								images[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );
								images[ f ].format = texDatas.format;
								images[ f ].width = texDatas.width;
								images[ f ].height = texDatas.height;
  
							}
  
						}
  
					} else {
  
						texture.image.width = texDatas.width;
						texture.image.height = texDatas.height;
						texture.mipmaps = texDatas.mipmaps;
  
					}
  
					if ( texDatas.mipmapCount === 1 ) {
  
						texture.minFilter = LinearFilter;
  
					}
  
					texture.format = texDatas.format;
					texture.needsUpdate = true;
  
					if ( onLoad ) onLoad( texture );
  
				}, onProgress, onError );
  
			}
  
			return texture;
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author Nikos M. / https://github.com/foo123/
	 *
	 * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
	 */
  
	function DataTextureLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
		// override in sub classes
		this._parser = null;
  
	}
  
	Object.assign( DataTextureLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var texture = new DataTexture();
  
			var loader = new FileLoader( this.manager );
			loader.setResponseType( 'arraybuffer' );
  
			loader.load( url, function ( buffer ) {
  
				var texData = scope._parser( buffer );
  
				if ( ! texData ) return;
  
				if ( undefined !== texData.image ) {
  
					texture.image = texData.image;
  
				} else if ( undefined !== texData.data ) {
  
					texture.image.width = texData.width;
					texture.image.height = texData.height;
					texture.image.data = texData.data;
  
				}
  
				texture.wrapS = undefined !== texData.wrapS ? texData.wrapS : ClampToEdgeWrapping;
				texture.wrapT = undefined !== texData.wrapT ? texData.wrapT : ClampToEdgeWrapping;
  
				texture.magFilter = undefined !== texData.magFilter ? texData.magFilter : LinearFilter;
				texture.minFilter = undefined !== texData.minFilter ? texData.minFilter : LinearMipMapLinearFilter;
  
				texture.anisotropy = undefined !== texData.anisotropy ? texData.anisotropy : 1;
  
				if ( undefined !== texData.format ) {
  
					texture.format = texData.format;
  
				}
				if ( undefined !== texData.type ) {
  
					texture.type = texData.type;
  
				}
  
				if ( undefined !== texData.mipmaps ) {
  
					texture.mipmaps = texData.mipmaps;
  
				}
  
				if ( 1 === texData.mipmapCount ) {
  
					texture.minFilter = LinearFilter;
  
				}
  
				texture.needsUpdate = true;
  
				if ( onLoad ) onLoad( texture, texData );
  
			}, onProgress, onError );
  
  
			return texture;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
  
	function ImageLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( ImageLoader.prototype, {
  
		crossOrigin: 'Anonymous',
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			if ( url === undefined ) url = '';
  
			if ( this.path !== undefined ) url = this.path + url;
  
			url = this.manager.resolveURL( url );
  
			var scope = this;
  
			var cached = Cache.get( url );
  
			if ( cached !== undefined ) {
  
				scope.manager.itemStart( url );
  
				setTimeout( function () {
  
					if ( onLoad ) onLoad( cached );
  
					scope.manager.itemEnd( url );
  
				}, 0 );
  
				return cached;
  
			}
  
			var image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );
  
			function onImageLoad() {
  
				image.removeEventListener( 'load', onImageLoad, false );
				image.removeEventListener( 'error', onImageError, false );
  
				Cache.add( url, this );
  
				if ( onLoad ) onLoad( this );
  
				scope.manager.itemEnd( url );
  
			}
  
			function onImageError( event ) {
  
				image.removeEventListener( 'load', onImageLoad, false );
				image.removeEventListener( 'error', onImageError, false );
  
				if ( onError ) onError( event );
  
				scope.manager.itemEnd( url );
				scope.manager.itemError( url );
  
			}
  
			image.addEventListener( 'load', onImageLoad, false );
			image.addEventListener( 'error', onImageError, false );
  
			if ( url.substr( 0, 5 ) !== 'data:' ) {
  
				if ( this.crossOrigin !== undefined ) image.crossOrigin = this.crossOrigin;
  
			}
  
			scope.manager.itemStart( url );
  
			image.src = url;
  
			return image;
  
		},
  
		setCrossOrigin: function ( value ) {
  
			this.crossOrigin = value;
			return this;
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
  
	function CubeTextureLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( CubeTextureLoader.prototype, {
  
		crossOrigin: 'Anonymous',
  
		load: function ( urls, onLoad, onProgress, onError ) {
  
			var texture = new CubeTexture();
  
			var loader = new ImageLoader( this.manager );
			loader.setCrossOrigin( this.crossOrigin );
			loader.setPath( this.path );
  
			var loaded = 0;
  
			function loadTexture( i ) {
  
				loader.load( urls[ i ], function ( image ) {
  
					texture.images[ i ] = image;
  
					loaded ++;
  
					if ( loaded === 6 ) {
  
						texture.needsUpdate = true;
  
						if ( onLoad ) onLoad( texture );
  
					}
  
				}, undefined, onError );
  
			}
  
			for ( var i = 0; i < urls.length; ++ i ) {
  
				loadTexture( i );
  
			}
  
			return texture;
  
		},
  
		setCrossOrigin: function ( value ) {
  
			this.crossOrigin = value;
			return this;
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
  
	function TextureLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( TextureLoader.prototype, {
  
		crossOrigin: 'Anonymous',
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var texture = new Texture();
  
			var loader = new ImageLoader( this.manager );
			loader.setCrossOrigin( this.crossOrigin );
			loader.setPath( this.path );
  
			loader.load( url, function ( image ) {
  
				texture.image = image;
  
				// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.
				var isJPEG = url.search( /\.(jpg|jpeg)$/ ) > 0 || url.search( /^data\:image\/jpeg/ ) === 0;
  
				texture.format = isJPEG ? RGBFormat : RGBAFormat;
				texture.needsUpdate = true;
  
				if ( onLoad !== undefined ) {
  
					onLoad( texture );
  
				}
  
			}, onProgress, onError );
  
			return texture;
  
		},
  
		setCrossOrigin: function ( value ) {
  
			this.crossOrigin = value;
			return this;
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Extensible curve object
	 *
	 * Some common of curve methods:
	 * .getPoint( t, optionalTarget ), .getTangent( t )
	 * .getPointAt( u, optionalTarget ), .getTangentAt( u )
	 * .getPoints(), .getSpacedPoints()
	 * .getLength()
	 * .updateArcLengths()
	 *
	 * This following curves inherit from THREE.Curve:
	 *
	 * -- 2D curves --
	 * THREE.ArcCurve
	 * THREE.CubicBezierCurve
	 * THREE.EllipseCurve
	 * THREE.LineCurve
	 * THREE.QuadraticBezierCurve
	 * THREE.SplineCurve
	 *
	 * -- 3D curves --
	 * THREE.CatmullRomCurve3
	 * THREE.CubicBezierCurve3
	 * THREE.LineCurve3
	 * THREE.QuadraticBezierCurve3
	 *
	 * A series of curves can be represented as a THREE.CurvePath.
	 *
	 **/
  
	/**************************************************************
	 *	Abstract Curve base class
	 **************************************************************/
  
	function Curve() {
  
		this.type = 'Curve';
  
		this.arcLengthDivisions = 200;
  
	}
  
	Object.assign( Curve.prototype, {
  
		// Virtual base class method to overwrite and implement in subclasses
		//	- t [0 .. 1]
  
		getPoint: function ( /* t, optionalTarget */ ) {
  
			console.warn( 'THREE.Curve: .getPoint() not implemented.' );
			return null;
  
		},
  
		// Get point at relative position in curve according to arc length
		// - u [0 .. 1]
  
		getPointAt: function ( u, optionalTarget ) {
  
			var t = this.getUtoTmapping( u );
			return this.getPoint( t, optionalTarget );
  
		},
  
		// Get sequence of points using getPoint( t )
  
		getPoints: function ( divisions ) {
  
			if ( divisions === undefined ) divisions = 5;
  
			var points = [];
  
			for ( var d = 0; d <= divisions; d ++ ) {
  
				points.push( this.getPoint( d / divisions ) );
  
			}
  
			return points;
  
		},
  
		// Get sequence of points using getPointAt( u )
  
		getSpacedPoints: function ( divisions ) {
  
			if ( divisions === undefined ) divisions = 5;
  
			var points = [];
  
			for ( var d = 0; d <= divisions; d ++ ) {
  
				points.push( this.getPointAt( d / divisions ) );
  
			}
  
			return points;
  
		},
  
		// Get total curve arc length
  
		getLength: function () {
  
			var lengths = this.getLengths();
			return lengths[ lengths.length - 1 ];
  
		},
  
		// Get list of cumulative segment lengths
  
		getLengths: function ( divisions ) {
  
			if ( divisions === undefined ) divisions = this.arcLengthDivisions;
  
			if ( this.cacheArcLengths &&
				( this.cacheArcLengths.length === divisions + 1 ) &&
				! this.needsUpdate ) {
  
				return this.cacheArcLengths;
  
			}
  
			this.needsUpdate = false;
  
			var cache = [];
			var current, last = this.getPoint( 0 );
			var p, sum = 0;
  
			cache.push( 0 );
  
			for ( p = 1; p <= divisions; p ++ ) {
  
				current = this.getPoint( p / divisions );
				sum += current.distanceTo( last );
				cache.push( sum );
				last = current;
  
			}
  
			this.cacheArcLengths = cache;
  
			return cache; // { sums: cache, sum: sum }; Sum is in the last element.
  
		},
  
		updateArcLengths: function () {
  
			this.needsUpdate = true;
			this.getLengths();
  
		},
  
		// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant
  
		getUtoTmapping: function ( u, distance ) {
  
			var arcLengths = this.getLengths();
  
			var i = 0, il = arcLengths.length;
  
			var targetArcLength; // The targeted u distance value to get
  
			if ( distance ) {
  
				targetArcLength = distance;
  
			} else {
  
				targetArcLength = u * arcLengths[ il - 1 ];
  
			}
  
			// binary search for the index with largest value smaller than target u distance
  
			var low = 0, high = il - 1, comparison;
  
			while ( low <= high ) {
  
				i = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats
  
				comparison = arcLengths[ i ] - targetArcLength;
  
				if ( comparison < 0 ) {
  
					low = i + 1;
  
				} else if ( comparison > 0 ) {
  
					high = i - 1;
  
				} else {
  
					high = i;
					break;
  
					// DONE
  
				}
  
			}
  
			i = high;
  
			if ( arcLengths[ i ] === targetArcLength ) {
  
				return i / ( il - 1 );
  
			}
  
			// we could get finer grain at lengths, or use simple interpolation between two points
  
			var lengthBefore = arcLengths[ i ];
			var lengthAfter = arcLengths[ i + 1 ];
  
			var segmentLength = lengthAfter - lengthBefore;
  
			// determine where we are between the 'before' and 'after' points
  
			var segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;
  
			// add that fractional amount to t
  
			var t = ( i + segmentFraction ) / ( il - 1 );
  
			return t;
  
		},
  
		// Returns a unit vector tangent at t
		// In case any sub curve does not implement its tangent derivation,
		// 2 points a small delta apart will be used to find its gradient
		// which seems to give a reasonable approximation
  
		getTangent: function ( t ) {
  
			var delta = 0.0001;
			var t1 = t - delta;
			var t2 = t + delta;
  
			// Capping in case of danger
  
			if ( t1 < 0 ) t1 = 0;
			if ( t2 > 1 ) t2 = 1;
  
			var pt1 = this.getPoint( t1 );
			var pt2 = this.getPoint( t2 );
  
			var vec = pt2.clone().sub( pt1 );
			return vec.normalize();
  
		},
  
		getTangentAt: function ( u ) {
  
			var t = this.getUtoTmapping( u );
			return this.getTangent( t );
  
		},
  
		computeFrenetFrames: function ( segments, closed ) {
  
			// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf
  
			var normal = new Vector3();
  
			var tangents = [];
			var normals = [];
			var binormals = [];
  
			var vec = new Vector3();
			var mat = new Matrix4();
  
			var i, u, theta;
  
			// compute the tangent vectors for each segment on the curve
  
			for ( i = 0; i <= segments; i ++ ) {
  
				u = i / segments;
  
				tangents[ i ] = this.getTangentAt( u );
				tangents[ i ].normalize();
  
			}
  
			// select an initial normal vector perpendicular to the first tangent vector,
			// and in the direction of the minimum tangent xyz component
  
			normals[ 0 ] = new Vector3();
			binormals[ 0 ] = new Vector3();
			var min = Number.MAX_VALUE;
			var tx = Math.abs( tangents[ 0 ].x );
			var ty = Math.abs( tangents[ 0 ].y );
			var tz = Math.abs( tangents[ 0 ].z );
  
			if ( tx <= min ) {
  
				min = tx;
				normal.set( 1, 0, 0 );
  
			}
  
			if ( ty <= min ) {
  
				min = ty;
				normal.set( 0, 1, 0 );
  
			}
  
			if ( tz <= min ) {
  
				normal.set( 0, 0, 1 );
  
			}
  
			vec.crossVectors( tangents[ 0 ], normal ).normalize();
  
			normals[ 0 ].crossVectors( tangents[ 0 ], vec );
			binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );
  
  
			// compute the slowly-varying normal and binormal vectors for each segment on the curve
  
			for ( i = 1; i <= segments; i ++ ) {
  
				normals[ i ] = normals[ i - 1 ].clone();
  
				binormals[ i ] = binormals[ i - 1 ].clone();
  
				vec.crossVectors( tangents[ i - 1 ], tangents[ i ] );
  
				if ( vec.length() > Number.EPSILON ) {
  
					vec.normalize();
  
					theta = Math.acos( _Math.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors
  
					normals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );
  
				}
  
				binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );
  
			}
  
			// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same
  
			if ( closed === true ) {
  
				theta = Math.acos( _Math.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );
				theta /= segments;
  
				if ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {
  
					theta = - theta;
  
				}
  
				for ( i = 1; i <= segments; i ++ ) {
  
					// twist a little...
					normals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );
					binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );
  
				}
  
			}
  
			return {
				tangents: tangents,
				normals: normals,
				binormals: binormals
			};
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( source ) {
  
			this.arcLengthDivisions = source.arcLengthDivisions;
  
			return this;
  
		},
  
		toJSON: function () {
  
			var data = {
				metadata: {
					version: 4.5,
					type: 'Curve',
					generator: 'Curve.toJSON'
				}
			};
  
			data.arcLengthDivisions = this.arcLengthDivisions;
			data.type = this.type;
  
			return data;
  
		},
  
		fromJSON: function ( json ) {
  
			this.arcLengthDivisions = json.arcLengthDivisions;
  
			return this;
  
		}
  
	} );
  
	function EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {
  
		Curve.call( this );
  
		this.type = 'EllipseCurve';
  
		this.aX = aX || 0;
		this.aY = aY || 0;
  
		this.xRadius = xRadius || 1;
		this.yRadius = yRadius || 1;
  
		this.aStartAngle = aStartAngle || 0;
		this.aEndAngle = aEndAngle || 2 * Math.PI;
  
		this.aClockwise = aClockwise || false;
  
		this.aRotation = aRotation || 0;
  
	}
  
	EllipseCurve.prototype = Object.create( Curve.prototype );
	EllipseCurve.prototype.constructor = EllipseCurve;
  
	EllipseCurve.prototype.isEllipseCurve = true;
  
	EllipseCurve.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector2();
  
		var twoPi = Math.PI * 2;
		var deltaAngle = this.aEndAngle - this.aStartAngle;
		var samePoints = Math.abs( deltaAngle ) < Number.EPSILON;
  
		// ensures that deltaAngle is 0 .. 2 PI
		while ( deltaAngle < 0 ) deltaAngle += twoPi;
		while ( deltaAngle > twoPi ) deltaAngle -= twoPi;
  
		if ( deltaAngle < Number.EPSILON ) {
  
			if ( samePoints ) {
  
				deltaAngle = 0;
  
			} else {
  
				deltaAngle = twoPi;
  
			}
  
		}
  
		if ( this.aClockwise === true && ! samePoints ) {
  
			if ( deltaAngle === twoPi ) {
  
				deltaAngle = - twoPi;
  
			} else {
  
				deltaAngle = deltaAngle - twoPi;
  
			}
  
		}
  
		var angle = this.aStartAngle + t * deltaAngle;
		var x = this.aX + this.xRadius * Math.cos( angle );
		var y = this.aY + this.yRadius * Math.sin( angle );
  
		if ( this.aRotation !== 0 ) {
  
			var cos = Math.cos( this.aRotation );
			var sin = Math.sin( this.aRotation );
  
			var tx = x - this.aX;
			var ty = y - this.aY;
  
			// Rotate the point about the center of the ellipse.
			x = tx * cos - ty * sin + this.aX;
			y = tx * sin + ty * cos + this.aY;
  
		}
  
		return point.set( x, y );
  
	};
  
	EllipseCurve.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.aX = source.aX;
		this.aY = source.aY;
  
		this.xRadius = source.xRadius;
		this.yRadius = source.yRadius;
  
		this.aStartAngle = source.aStartAngle;
		this.aEndAngle = source.aEndAngle;
  
		this.aClockwise = source.aClockwise;
  
		this.aRotation = source.aRotation;
  
		return this;
  
	};
  
  
	EllipseCurve.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.aX = this.aX;
		data.aY = this.aY;
  
		data.xRadius = this.xRadius;
		data.yRadius = this.yRadius;
  
		data.aStartAngle = this.aStartAngle;
		data.aEndAngle = this.aEndAngle;
  
		data.aClockwise = this.aClockwise;
  
		data.aRotation = this.aRotation;
  
		return data;
  
	};
  
	EllipseCurve.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.aX = json.aX;
		this.aY = json.aY;
  
		this.xRadius = json.xRadius;
		this.yRadius = json.yRadius;
  
		this.aStartAngle = json.aStartAngle;
		this.aEndAngle = json.aEndAngle;
  
		this.aClockwise = json.aClockwise;
  
		this.aRotation = json.aRotation;
  
		return this;
  
	};
  
	function ArcCurve( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {
  
		EllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );
  
		this.type = 'ArcCurve';
  
	}
  
	ArcCurve.prototype = Object.create( EllipseCurve.prototype );
	ArcCurve.prototype.constructor = ArcCurve;
  
	ArcCurve.prototype.isArcCurve = true;
  
	/**
	 * @author zz85 https://github.com/zz85
	 *
	 * Centripetal CatmullRom Curve - which is useful for avoiding
	 * cusps and self-intersections in non-uniform catmull rom curves.
	 * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
	 *
	 * curve.type accepts centripetal(default), chordal and catmullrom
	 * curve.tension is used for catmullrom which defaults to 0.5
	 */
  
  
	/*
	Based on an optimized c++ solution in
	 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
	 - http://ideone.com/NoEbVM
  
	This CubicPoly class could be used for reusing some variables and calculations,
	but for three.js curve use, it could be possible inlined and flatten into a single function call
	which can be placed in CurveUtils.
	*/
  
	function CubicPoly() {
  
		var c0 = 0, c1 = 0, c2 = 0, c3 = 0;
  
		/*
		 * Compute coefficients for a cubic polynomial
		 *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3
		 * such that
		 *   p(0) = x0, p(1) = x1
		 *  and
		 *   p'(0) = t0, p'(1) = t1.
		 */
		function init( x0, x1, t0, t1 ) {
  
			c0 = x0;
			c1 = t0;
			c2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;
			c3 = 2 * x0 - 2 * x1 + t0 + t1;
  
		}
  
		return {
  
			initCatmullRom: function ( x0, x1, x2, x3, tension ) {
  
				init( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );
  
			},
  
			initNonuniformCatmullRom: function ( x0, x1, x2, x3, dt0, dt1, dt2 ) {
  
				// compute tangents when parameterized in [t1,t2]
				var t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;
				var t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;
  
				// rescale tangents for parametrization in [0,1]
				t1 *= dt1;
				t2 *= dt1;
  
				init( x1, x2, t1, t2 );
  
			},
  
			calc: function ( t ) {
  
				var t2 = t * t;
				var t3 = t2 * t;
				return c0 + c1 * t + c2 * t2 + c3 * t3;
  
			}
  
		};
  
	}
  
	//
  
	var tmp = new Vector3();
	var px = new CubicPoly(), py = new CubicPoly(), pz = new CubicPoly();
  
	function CatmullRomCurve3( points, closed, curveType, tension ) {
  
		Curve.call( this );
  
		this.type = 'CatmullRomCurve3';
  
		this.points = points || [];
		this.closed = closed || false;
		this.curveType = curveType || 'centripetal';
		this.tension = tension || 0.5;
  
	}
  
	CatmullRomCurve3.prototype = Object.create( Curve.prototype );
	CatmullRomCurve3.prototype.constructor = CatmullRomCurve3;
  
	CatmullRomCurve3.prototype.isCatmullRomCurve3 = true;
  
	CatmullRomCurve3.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector3();
  
		var points = this.points;
		var l = points.length;
  
		var p = ( l - ( this.closed ? 0 : 1 ) ) * t;
		var intPoint = Math.floor( p );
		var weight = p - intPoint;
  
		if ( this.closed ) {
  
			intPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / l ) + 1 ) * l;
  
		} else if ( weight === 0 && intPoint === l - 1 ) {
  
			intPoint = l - 2;
			weight = 1;
  
		}
  
		var p0, p1, p2, p3; // 4 points
  
		if ( this.closed || intPoint > 0 ) {
  
			p0 = points[ ( intPoint - 1 ) % l ];
  
		} else {
  
			// extrapolate first point
			tmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );
			p0 = tmp;
  
		}
  
		p1 = points[ intPoint % l ];
		p2 = points[ ( intPoint + 1 ) % l ];
  
		if ( this.closed || intPoint + 2 < l ) {
  
			p3 = points[ ( intPoint + 2 ) % l ];
  
		} else {
  
			// extrapolate last point
			tmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );
			p3 = tmp;
  
		}
  
		if ( this.curveType === 'centripetal' || this.curveType === 'chordal' ) {
  
			// init Centripetal / Chordal Catmull-Rom
			var pow = this.curveType === 'chordal' ? 0.5 : 0.25;
			var dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );
			var dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );
			var dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );
  
			// safety check for repeated points
			if ( dt1 < 1e-4 ) dt1 = 1.0;
			if ( dt0 < 1e-4 ) dt0 = dt1;
			if ( dt2 < 1e-4 ) dt2 = dt1;
  
			px.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );
			py.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );
			pz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );
  
		} else if ( this.curveType === 'catmullrom' ) {
  
			px.initCatmullRom( p0.x, p1.x, p2.x, p3.x, this.tension );
			py.initCatmullRom( p0.y, p1.y, p2.y, p3.y, this.tension );
			pz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, this.tension );
  
		}
  
		point.set(
			px.calc( weight ),
			py.calc( weight ),
			pz.calc( weight )
		);
  
		return point;
  
	};
  
	CatmullRomCurve3.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.points = [];
  
		for ( var i = 0, l = source.points.length; i < l; i ++ ) {
  
			var point = source.points[ i ];
  
			this.points.push( point.clone() );
  
		}
  
		this.closed = source.closed;
		this.curveType = source.curveType;
		this.tension = source.tension;
  
		return this;
  
	};
  
	CatmullRomCurve3.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.points = [];
  
		for ( var i = 0, l = this.points.length; i < l; i ++ ) {
  
			var point = this.points[ i ];
			data.points.push( point.toArray() );
  
		}
  
		data.closed = this.closed;
		data.curveType = this.curveType;
		data.tension = this.tension;
  
		return data;
  
	};
  
	CatmullRomCurve3.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.points = [];
  
		for ( var i = 0, l = json.points.length; i < l; i ++ ) {
  
			var point = json.points[ i ];
			this.points.push( new Vector3().fromArray( point ) );
  
		}
  
		this.closed = json.closed;
		this.curveType = json.curveType;
		this.tension = json.tension;
  
		return this;
  
	};
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 * Bezier Curves formulas obtained from
	 * http://en.wikipedia.org/wiki/Bézier_curve
	 */
  
	function CatmullRom( t, p0, p1, p2, p3 ) {
  
		var v0 = ( p2 - p0 ) * 0.5;
		var v1 = ( p3 - p1 ) * 0.5;
		var t2 = t * t;
		var t3 = t * t2;
		return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;
  
	}
  
	//
  
	function QuadraticBezierP0( t, p ) {
  
		var k = 1 - t;
		return k * k * p;
  
	}
  
	function QuadraticBezierP1( t, p ) {
  
		return 2 * ( 1 - t ) * t * p;
  
	}
  
	function QuadraticBezierP2( t, p ) {
  
		return t * t * p;
  
	}
  
	function QuadraticBezier( t, p0, p1, p2 ) {
  
		return QuadraticBezierP0( t, p0 ) + QuadraticBezierP1( t, p1 ) +
			QuadraticBezierP2( t, p2 );
  
	}
  
	//
  
	function CubicBezierP0( t, p ) {
  
		var k = 1 - t;
		return k * k * k * p;
  
	}
  
	function CubicBezierP1( t, p ) {
  
		var k = 1 - t;
		return 3 * k * k * t * p;
  
	}
  
	function CubicBezierP2( t, p ) {
  
		return 3 * ( 1 - t ) * t * t * p;
  
	}
  
	function CubicBezierP3( t, p ) {
  
		return t * t * t * p;
  
	}
  
	function CubicBezier( t, p0, p1, p2, p3 ) {
  
		return CubicBezierP0( t, p0 ) + CubicBezierP1( t, p1 ) + CubicBezierP2( t, p2 ) +
			CubicBezierP3( t, p3 );
  
	}
  
	function CubicBezierCurve( v0, v1, v2, v3 ) {
  
		Curve.call( this );
  
		this.type = 'CubicBezierCurve';
  
		this.v0 = v0 || new Vector2();
		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();
		this.v3 = v3 || new Vector2();
  
	}
  
	CubicBezierCurve.prototype = Object.create( Curve.prototype );
	CubicBezierCurve.prototype.constructor = CubicBezierCurve;
  
	CubicBezierCurve.prototype.isCubicBezierCurve = true;
  
	CubicBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector2();
  
		var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;
  
		point.set(
			CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
			CubicBezier( t, v0.y, v1.y, v2.y, v3.y )
		);
  
		return point;
  
	};
  
	CubicBezierCurve.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
		this.v3.copy( source.v3 );
  
		return this;
  
	};
  
	CubicBezierCurve.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		data.v3 = this.v3.toArray();
  
		return data;
  
	};
  
	CubicBezierCurve.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v0.fromArray( json.v0 );
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
		this.v3.fromArray( json.v3 );
  
		return this;
  
	};
  
	function CubicBezierCurve3( v0, v1, v2, v3 ) {
  
		Curve.call( this );
  
		this.type = 'CubicBezierCurve3';
  
		this.v0 = v0 || new Vector3();
		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();
		this.v3 = v3 || new Vector3();
  
	}
  
	CubicBezierCurve3.prototype = Object.create( Curve.prototype );
	CubicBezierCurve3.prototype.constructor = CubicBezierCurve3;
  
	CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;
  
	CubicBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector3();
  
		var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;
  
		point.set(
			CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
			CubicBezier( t, v0.y, v1.y, v2.y, v3.y ),
			CubicBezier( t, v0.z, v1.z, v2.z, v3.z )
		);
  
		return point;
  
	};
  
	CubicBezierCurve3.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
		this.v3.copy( source.v3 );
  
		return this;
  
	};
  
	CubicBezierCurve3.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		data.v3 = this.v3.toArray();
  
		return data;
  
	};
  
	CubicBezierCurve3.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v0.fromArray( json.v0 );
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
		this.v3.fromArray( json.v3 );
  
		return this;
  
	};
  
	function LineCurve( v1, v2 ) {
  
		Curve.call( this );
  
		this.type = 'LineCurve';
  
		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();
  
	}
  
	LineCurve.prototype = Object.create( Curve.prototype );
	LineCurve.prototype.constructor = LineCurve;
  
	LineCurve.prototype.isLineCurve = true;
  
	LineCurve.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector2();
  
		if ( t === 1 ) {
  
			point.copy( this.v2 );
  
		} else {
  
			point.copy( this.v2 ).sub( this.v1 );
			point.multiplyScalar( t ).add( this.v1 );
  
		}
  
		return point;
  
	};
  
	// Line curve is linear, so we can overwrite default getPointAt
  
	LineCurve.prototype.getPointAt = function ( u, optionalTarget ) {
  
		return this.getPoint( u, optionalTarget );
  
	};
  
	LineCurve.prototype.getTangent = function ( /* t */ ) {
  
		var tangent = this.v2.clone().sub( this.v1 );
  
		return tangent.normalize();
  
	};
  
	LineCurve.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
  
		return this;
  
	};
  
	LineCurve.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
  
		return data;
  
	};
  
	LineCurve.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
  
		return this;
  
	};
  
	function LineCurve3( v1, v2 ) {
  
		Curve.call( this );
  
		this.type = 'LineCurve3';
  
		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();
  
	}
  
	LineCurve3.prototype = Object.create( Curve.prototype );
	LineCurve3.prototype.constructor = LineCurve3;
  
	LineCurve3.prototype.isLineCurve3 = true;
  
	LineCurve3.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector3();
  
		if ( t === 1 ) {
  
			point.copy( this.v2 );
  
		} else {
  
			point.copy( this.v2 ).sub( this.v1 );
			point.multiplyScalar( t ).add( this.v1 );
  
		}
  
		return point;
  
	};
  
	// Line curve is linear, so we can overwrite default getPointAt
  
	LineCurve3.prototype.getPointAt = function ( u, optionalTarget ) {
  
		return this.getPoint( u, optionalTarget );
  
	};
  
	LineCurve3.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
  
		return this;
  
	};
  
	LineCurve3.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
  
		return data;
  
	};
  
	LineCurve3.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
  
		return this;
  
	};
  
	function QuadraticBezierCurve( v0, v1, v2 ) {
  
		Curve.call( this );
  
		this.type = 'QuadraticBezierCurve';
  
		this.v0 = v0 || new Vector2();
		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();
  
	}
  
	QuadraticBezierCurve.prototype = Object.create( Curve.prototype );
	QuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;
  
	QuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;
  
	QuadraticBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector2();
  
		var v0 = this.v0, v1 = this.v1, v2 = this.v2;
  
		point.set(
			QuadraticBezier( t, v0.x, v1.x, v2.x ),
			QuadraticBezier( t, v0.y, v1.y, v2.y )
		);
  
		return point;
  
	};
  
	QuadraticBezierCurve.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
  
		return this;
  
	};
  
	QuadraticBezierCurve.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
  
		return data;
  
	};
  
	QuadraticBezierCurve.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v0.fromArray( json.v0 );
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
  
		return this;
  
	};
  
	function QuadraticBezierCurve3( v0, v1, v2 ) {
  
		Curve.call( this );
  
		this.type = 'QuadraticBezierCurve3';
  
		this.v0 = v0 || new Vector3();
		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();
  
	}
  
	QuadraticBezierCurve3.prototype = Object.create( Curve.prototype );
	QuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;
  
	QuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;
  
	QuadraticBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector3();
  
		var v0 = this.v0, v1 = this.v1, v2 = this.v2;
  
		point.set(
			QuadraticBezier( t, v0.x, v1.x, v2.x ),
			QuadraticBezier( t, v0.y, v1.y, v2.y ),
			QuadraticBezier( t, v0.z, v1.z, v2.z )
		);
  
		return point;
  
	};
  
	QuadraticBezierCurve3.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
  
		return this;
  
	};
  
	QuadraticBezierCurve3.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
  
		return data;
  
	};
  
	QuadraticBezierCurve3.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.v0.fromArray( json.v0 );
		this.v1.fromArray( json.v1 );
		this.v2.fromArray( json.v2 );
  
		return this;
  
	};
  
	function SplineCurve( points /* array of Vector2 */ ) {
  
		Curve.call( this );
  
		this.type = 'SplineCurve';
  
		this.points = points || [];
  
	}
  
	SplineCurve.prototype = Object.create( Curve.prototype );
	SplineCurve.prototype.constructor = SplineCurve;
  
	SplineCurve.prototype.isSplineCurve = true;
  
	SplineCurve.prototype.getPoint = function ( t, optionalTarget ) {
  
		var point = optionalTarget || new Vector2();
  
		var points = this.points;
		var p = ( points.length - 1 ) * t;
  
		var intPoint = Math.floor( p );
		var weight = p - intPoint;
  
		var p0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];
		var p1 = points[ intPoint ];
		var p2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];
		var p3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];
  
		point.set(
			CatmullRom( weight, p0.x, p1.x, p2.x, p3.x ),
			CatmullRom( weight, p0.y, p1.y, p2.y, p3.y )
		);
  
		return point;
  
	};
  
	SplineCurve.prototype.copy = function ( source ) {
  
		Curve.prototype.copy.call( this, source );
  
		this.points = [];
  
		for ( var i = 0, l = source.points.length; i < l; i ++ ) {
  
			var point = source.points[ i ];
  
			this.points.push( point.clone() );
  
		}
  
		return this;
  
	};
  
	SplineCurve.prototype.toJSON = function () {
  
		var data = Curve.prototype.toJSON.call( this );
  
		data.points = [];
  
		for ( var i = 0, l = this.points.length; i < l; i ++ ) {
  
			var point = this.points[ i ];
			data.points.push( point.toArray() );
  
		}
  
		return data;
  
	};
  
	SplineCurve.prototype.fromJSON = function ( json ) {
  
		Curve.prototype.fromJSON.call( this, json );
  
		this.points = [];
  
		for ( var i = 0, l = json.points.length; i < l; i ++ ) {
  
			var point = json.points[ i ];
			this.points.push( new Vector2().fromArray( point ) );
  
		}
  
		return this;
  
	};
  
  
  
	var Curves = /*#__PURE__*/Object.freeze({
		ArcCurve: ArcCurve,
		CatmullRomCurve3: CatmullRomCurve3,
		CubicBezierCurve: CubicBezierCurve,
		CubicBezierCurve3: CubicBezierCurve3,
		EllipseCurve: EllipseCurve,
		LineCurve: LineCurve,
		LineCurve3: LineCurve3,
		QuadraticBezierCurve: QuadraticBezierCurve,
		QuadraticBezierCurve3: QuadraticBezierCurve3,
		SplineCurve: SplineCurve
	});
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 **/
  
	/**************************************************************
	 *	Curved Path - a curve path is simply a array of connected
	 *  curves, but retains the api of a curve
	 **************************************************************/
  
	function CurvePath() {
  
		Curve.call( this );
  
		this.type = 'CurvePath';
  
		this.curves = [];
		this.autoClose = false; // Automatically closes the path
  
	}
  
	CurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {
  
		constructor: CurvePath,
  
		add: function ( curve ) {
  
			this.curves.push( curve );
  
		},
  
		closePath: function () {
  
			// Add a line curve if start and end of lines are not connected
			var startPoint = this.curves[ 0 ].getPoint( 0 );
			var endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );
  
			if ( ! startPoint.equals( endPoint ) ) {
  
				this.curves.push( new LineCurve( endPoint, startPoint ) );
  
			}
  
		},
  
		// To get accurate point with reference to
		// entire path distance at time t,
		// following has to be done:
  
		// 1. Length of each sub path have to be known
		// 2. Locate and identify type of curve
		// 3. Get t for the curve
		// 4. Return curve.getPointAt(t')
  
		getPoint: function ( t ) {
  
			var d = t * this.getLength();
			var curveLengths = this.getCurveLengths();
			var i = 0;
  
			// To think about boundaries points.
  
			while ( i < curveLengths.length ) {
  
				if ( curveLengths[ i ] >= d ) {
  
					var diff = curveLengths[ i ] - d;
					var curve = this.curves[ i ];
  
					var segmentLength = curve.getLength();
					var u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;
  
					return curve.getPointAt( u );
  
				}
  
				i ++;
  
			}
  
			return null;
  
			// loop where sum != 0, sum > d , sum+1 <d
  
		},
  
		// We cannot use the default THREE.Curve getPoint() with getLength() because in
		// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
		// getPoint() depends on getLength
  
		getLength: function () {
  
			var lens = this.getCurveLengths();
			return lens[ lens.length - 1 ];
  
		},
  
		// cacheLengths must be recalculated.
		updateArcLengths: function () {
  
			this.needsUpdate = true;
			this.cacheLengths = null;
			this.getCurveLengths();
  
		},
  
		// Compute lengths and cache them
		// We cannot overwrite getLengths() because UtoT mapping uses it.
  
		getCurveLengths: function () {
  
			// We use cache values if curves and cache array are same length
  
			if ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {
  
				return this.cacheLengths;
  
			}
  
			// Get length of sub-curve
			// Push sums into cached array
  
			var lengths = [], sums = 0;
  
			for ( var i = 0, l = this.curves.length; i < l; i ++ ) {
  
				sums += this.curves[ i ].getLength();
				lengths.push( sums );
  
			}
  
			this.cacheLengths = lengths;
  
			return lengths;
  
		},
  
		getSpacedPoints: function ( divisions ) {
  
			if ( divisions === undefined ) divisions = 40;
  
			var points = [];
  
			for ( var i = 0; i <= divisions; i ++ ) {
  
				points.push( this.getPoint( i / divisions ) );
  
			}
  
			if ( this.autoClose ) {
  
				points.push( points[ 0 ] );
  
			}
  
			return points;
  
		},
  
		getPoints: function ( divisions ) {
  
			divisions = divisions || 12;
  
			var points = [], last;
  
			for ( var i = 0, curves = this.curves; i < curves.length; i ++ ) {
  
				var curve = curves[ i ];
				var resolution = ( curve && curve.isEllipseCurve ) ? divisions * 2
					: ( curve && curve.isLineCurve ) ? 1
						: ( curve && curve.isSplineCurve ) ? divisions * curve.points.length
							: divisions;
  
				var pts = curve.getPoints( resolution );
  
				for ( var j = 0; j < pts.length; j ++ ) {
  
					var point = pts[ j ];
  
					if ( last && last.equals( point ) ) continue; // ensures no consecutive points are duplicates
  
					points.push( point );
					last = point;
  
				}
  
			}
  
			if ( this.autoClose && points.length > 1 && ! points[ points.length - 1 ].equals( points[ 0 ] ) ) {
  
				points.push( points[ 0 ] );
  
			}
  
			return points;
  
		},
  
		copy: function ( source ) {
  
			Curve.prototype.copy.call( this, source );
  
			this.curves = [];
  
			for ( var i = 0, l = source.curves.length; i < l; i ++ ) {
  
				var curve = source.curves[ i ];
  
				this.curves.push( curve.clone() );
  
			}
  
			this.autoClose = source.autoClose;
  
			return this;
  
		},
  
		toJSON: function () {
  
			var data = Curve.prototype.toJSON.call( this );
  
			data.autoClose = this.autoClose;
			data.curves = [];
  
			for ( var i = 0, l = this.curves.length; i < l; i ++ ) {
  
				var curve = this.curves[ i ];
				data.curves.push( curve.toJSON() );
  
			}
  
			return data;
  
		},
  
		fromJSON: function ( json ) {
  
			Curve.prototype.fromJSON.call( this, json );
  
			this.autoClose = json.autoClose;
			this.curves = [];
  
			for ( var i = 0, l = json.curves.length; i < l; i ++ ) {
  
				var curve = json.curves[ i ];
				this.curves.push( new Curves[ curve.type ]().fromJSON( curve ) );
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Creates free form 2d path using series of points, lines or curves.
	 **/
  
	function Path( points ) {
  
		CurvePath.call( this );
  
		this.type = 'Path';
  
		this.currentPoint = new Vector2();
  
		if ( points ) {
  
			this.setFromPoints( points );
  
		}
  
	}
  
	Path.prototype = Object.assign( Object.create( CurvePath.prototype ), {
  
		constructor: Path,
  
		setFromPoints: function ( points ) {
  
			this.moveTo( points[ 0 ].x, points[ 0 ].y );
  
			for ( var i = 1, l = points.length; i < l; i ++ ) {
  
				this.lineTo( points[ i ].x, points[ i ].y );
  
			}
  
		},
  
		moveTo: function ( x, y ) {
  
			this.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?
  
		},
  
		lineTo: function ( x, y ) {
  
			var curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );
			this.curves.push( curve );
  
			this.currentPoint.set( x, y );
  
		},
  
		quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {
  
			var curve = new QuadraticBezierCurve(
				this.currentPoint.clone(),
				new Vector2( aCPx, aCPy ),
				new Vector2( aX, aY )
			);
  
			this.curves.push( curve );
  
			this.currentPoint.set( aX, aY );
  
		},
  
		bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {
  
			var curve = new CubicBezierCurve(
				this.currentPoint.clone(),
				new Vector2( aCP1x, aCP1y ),
				new Vector2( aCP2x, aCP2y ),
				new Vector2( aX, aY )
			);
  
			this.curves.push( curve );
  
			this.currentPoint.set( aX, aY );
  
		},
  
		splineThru: function ( pts /*Array of Vector*/ ) {
  
			var npts = [ this.currentPoint.clone() ].concat( pts );
  
			var curve = new SplineCurve( npts );
			this.curves.push( curve );
  
			this.currentPoint.copy( pts[ pts.length - 1 ] );
  
		},
  
		arc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {
  
			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;
  
			this.absarc( aX + x0, aY + y0, aRadius,
				aStartAngle, aEndAngle, aClockwise );
  
		},
  
		absarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {
  
			this.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );
  
		},
  
		ellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {
  
			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;
  
			this.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );
  
		},
  
		absellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {
  
			var curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );
  
			if ( this.curves.length > 0 ) {
  
				// if a previous curve is present, attempt to join
				var firstPoint = curve.getPoint( 0 );
  
				if ( ! firstPoint.equals( this.currentPoint ) ) {
  
					this.lineTo( firstPoint.x, firstPoint.y );
  
				}
  
			}
  
			this.curves.push( curve );
  
			var lastPoint = curve.getPoint( 1 );
			this.currentPoint.copy( lastPoint );
  
		},
  
		copy: function ( source ) {
  
			CurvePath.prototype.copy.call( this, source );
  
			this.currentPoint.copy( source.currentPoint );
  
			return this;
  
		},
  
		toJSON: function () {
  
			var data = CurvePath.prototype.toJSON.call( this );
  
			data.currentPoint = this.currentPoint.toArray();
  
			return data;
  
		},
  
		fromJSON: function ( json ) {
  
			CurvePath.prototype.fromJSON.call( this, json );
  
			this.currentPoint.fromArray( json.currentPoint );
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Defines a 2d shape plane using paths.
	 **/
  
	// STEP 1 Create a path.
	// STEP 2 Turn path into shape.
	// STEP 3 ExtrudeGeometry takes in Shape/Shapes
	// STEP 3a - Extract points from each shape, turn to vertices
	// STEP 3b - Triangulate each shape, add faces.
  
	function Shape( points ) {
  
		Path.call( this, points );
  
		this.uuid = _Math.generateUUID();
  
		this.type = 'Shape';
  
		this.holes = [];
  
	}
  
	Shape.prototype = Object.assign( Object.create( Path.prototype ), {
  
		constructor: Shape,
  
		getPointsHoles: function ( divisions ) {
  
			var holesPts = [];
  
			for ( var i = 0, l = this.holes.length; i < l; i ++ ) {
  
				holesPts[ i ] = this.holes[ i ].getPoints( divisions );
  
			}
  
			return holesPts;
  
		},
  
		// get points of shape and holes (keypoints based on segments parameter)
  
		extractPoints: function ( divisions ) {
  
			return {
  
				shape: this.getPoints( divisions ),
				holes: this.getPointsHoles( divisions )
  
			};
  
		},
  
		copy: function ( source ) {
  
			Path.prototype.copy.call( this, source );
  
			this.holes = [];
  
			for ( var i = 0, l = source.holes.length; i < l; i ++ ) {
  
				var hole = source.holes[ i ];
  
				this.holes.push( hole.clone() );
  
			}
  
			return this;
  
		},
  
		toJSON: function () {
  
			var data = Path.prototype.toJSON.call( this );
  
			data.uuid = this.uuid;
			data.holes = [];
  
			for ( var i = 0, l = this.holes.length; i < l; i ++ ) {
  
				var hole = this.holes[ i ];
				data.holes.push( hole.toJSON() );
  
			}
  
			return data;
  
		},
  
		fromJSON: function ( json ) {
  
			Path.prototype.fromJSON.call( this, json );
  
			this.uuid = json.uuid;
			this.holes = [];
  
			for ( var i = 0, l = json.holes.length; i < l; i ++ ) {
  
				var hole = json.holes[ i ];
				this.holes.push( new Path().fromJSON( hole ) );
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Light( color, intensity ) {
  
		Object3D.call( this );
  
		this.type = 'Light';
  
		this.color = new Color( color );
		this.intensity = intensity !== undefined ? intensity : 1;
  
		this.receiveShadow = undefined;
  
	}
  
	Light.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Light,
  
		isLight: true,
  
		copy: function ( source ) {
  
			Object3D.prototype.copy.call( this, source );
  
			this.color.copy( source.color );
			this.intensity = source.intensity;
  
			return this;
  
		},
  
		toJSON: function ( meta ) {
  
			var data = Object3D.prototype.toJSON.call( this, meta );
  
			data.object.color = this.color.getHex();
			data.object.intensity = this.intensity;
  
			if ( this.groundColor !== undefined ) data.object.groundColor = this.groundColor.getHex();
  
			if ( this.distance !== undefined ) data.object.distance = this.distance;
			if ( this.angle !== undefined ) data.object.angle = this.angle;
			if ( this.decay !== undefined ) data.object.decay = this.decay;
			if ( this.penumbra !== undefined ) data.object.penumbra = this.penumbra;
  
			if ( this.shadow !== undefined ) data.object.shadow = this.shadow.toJSON();
  
			return data;
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function HemisphereLight( skyColor, groundColor, intensity ) {
  
		Light.call( this, skyColor, intensity );
  
		this.type = 'HemisphereLight';
  
		this.castShadow = undefined;
  
		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();
  
		this.groundColor = new Color( groundColor );
  
	}
  
	HemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: HemisphereLight,
  
		isHemisphereLight: true,
  
		copy: function ( source ) {
  
			Light.prototype.copy.call( this, source );
  
			this.groundColor.copy( source.groundColor );
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function LightShadow( camera ) {
  
		this.camera = camera;
  
		this.bias = 0;
		this.radius = 1;
  
		this.mapSize = new Vector2( 512, 512 );
  
		this.map = null;
		this.matrix = new Matrix4();
  
	}
  
	Object.assign( LightShadow.prototype, {
  
		copy: function ( source ) {
  
			this.camera = source.camera.clone();
  
			this.bias = source.bias;
			this.radius = source.radius;
  
			this.mapSize.copy( source.mapSize );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		toJSON: function () {
  
			var object = {};
  
			if ( this.bias !== 0 ) object.bias = this.bias;
			if ( this.radius !== 1 ) object.radius = this.radius;
			if ( this.mapSize.x !== 512 || this.mapSize.y !== 512 ) object.mapSize = this.mapSize.toArray();
  
			object.camera = this.camera.toJSON( false ).object;
			delete object.camera.matrix;
  
			return object;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function SpotLightShadow() {
  
		LightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );
  
	}
  
	SpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {
  
		constructor: SpotLightShadow,
  
		isSpotLightShadow: true,
  
		update: function ( light ) {
  
			var camera = this.camera;
  
			var fov = _Math.RAD2DEG * 2 * light.angle;
			var aspect = this.mapSize.width / this.mapSize.height;
			var far = light.distance || camera.far;
  
			if ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {
  
				camera.fov = fov;
				camera.aspect = aspect;
				camera.far = far;
				camera.updateProjectionMatrix();
  
			}
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function SpotLight( color, intensity, distance, angle, penumbra, decay ) {
  
		Light.call( this, color, intensity );
  
		this.type = 'SpotLight';
  
		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();
  
		this.target = new Object3D();
  
		Object.defineProperty( this, 'power', {
			get: function () {
  
				// intensity = power per solid angle.
				// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				return this.intensity * Math.PI;
  
			},
			set: function ( power ) {
  
				// intensity = power per solid angle.
				// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				this.intensity = power / Math.PI;
  
			}
		} );
  
		this.distance = ( distance !== undefined ) ? distance : 0;
		this.angle = ( angle !== undefined ) ? angle : Math.PI / 3;
		this.penumbra = ( penumbra !== undefined ) ? penumbra : 0;
		this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.
  
		this.shadow = new SpotLightShadow();
  
	}
  
	SpotLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: SpotLight,
  
		isSpotLight: true,
  
		copy: function ( source ) {
  
			Light.prototype.copy.call( this, source );
  
			this.distance = source.distance;
			this.angle = source.angle;
			this.penumbra = source.penumbra;
			this.decay = source.decay;
  
			this.target = source.target.clone();
  
			this.shadow = source.shadow.clone();
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
  
	function PointLight( color, intensity, distance, decay ) {
  
		Light.call( this, color, intensity );
  
		this.type = 'PointLight';
  
		Object.defineProperty( this, 'power', {
			get: function () {
  
				// intensity = power per solid angle.
				// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				return this.intensity * 4 * Math.PI;
  
			},
			set: function ( power ) {
  
				// intensity = power per solid angle.
				// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
				this.intensity = power / ( 4 * Math.PI );
  
			}
		} );
  
		this.distance = ( distance !== undefined ) ? distance : 0;
		this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.
  
		this.shadow = new LightShadow( new PerspectiveCamera( 90, 1, 0.5, 500 ) );
  
	}
  
	PointLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: PointLight,
  
		isPointLight: true,
  
		copy: function ( source ) {
  
			Light.prototype.copy.call( this, source );
  
			this.distance = source.distance;
			this.decay = source.decay;
  
			this.shadow = source.shadow.clone();
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function DirectionalLightShadow( ) {
  
		LightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );
  
	}
  
	DirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {
  
		constructor: DirectionalLightShadow
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function DirectionalLight( color, intensity ) {
  
		Light.call( this, color, intensity );
  
		this.type = 'DirectionalLight';
  
		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();
  
		this.target = new Object3D();
  
		this.shadow = new DirectionalLightShadow();
  
	}
  
	DirectionalLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: DirectionalLight,
  
		isDirectionalLight: true,
  
		copy: function ( source ) {
  
			Light.prototype.copy.call( this, source );
  
			this.target = source.target.clone();
  
			this.shadow = source.shadow.clone();
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function AmbientLight( color, intensity ) {
  
		Light.call( this, color, intensity );
  
		this.type = 'AmbientLight';
  
		this.castShadow = undefined;
  
	}
  
	AmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: AmbientLight,
  
		isAmbientLight: true
  
	} );
  
	/**
	 * @author abelnation / http://github.com/abelnation
	 */
  
	function RectAreaLight( color, intensity, width, height ) {
  
		Light.call( this, color, intensity );
  
		this.type = 'RectAreaLight';
  
		this.width = ( width !== undefined ) ? width : 10;
		this.height = ( height !== undefined ) ? height : 10;
  
	}
  
	RectAreaLight.prototype = Object.assign( Object.create( Light.prototype ), {
  
		constructor: RectAreaLight,
  
		isRectAreaLight: true,
  
		copy: function ( source ) {
  
			Light.prototype.copy.call( this, source );
  
			this.width = source.width;
			this.height = source.height;
  
			return this;
  
		},
  
		toJSON: function ( meta ) {
  
			var data = Light.prototype.toJSON.call( this, meta );
  
			data.object.width = this.width;
			data.object.height = this.height;
  
			return data;
  
		}
  
	} );
  
	/**
	 *
	 * A Track that interpolates Strings
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function StringKeyframeTrack( name, times, values, interpolation ) {
  
		KeyframeTrack.call( this, name, times, values, interpolation );
  
	}
  
	StringKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: StringKeyframeTrack,
  
		ValueTypeName: 'string',
		ValueBufferType: Array,
  
		DefaultInterpolation: InterpolateDiscrete,
  
		InterpolantFactoryMethodLinear: undefined,
  
		InterpolantFactoryMethodSmooth: undefined
  
	} );
  
	/**
	 *
	 * A Track of Boolean keyframe values.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function BooleanKeyframeTrack( name, times, values ) {
  
		KeyframeTrack.call( this, name, times, values );
  
	}
  
	BooleanKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: BooleanKeyframeTrack,
  
		ValueTypeName: 'bool',
		ValueBufferType: Array,
  
		DefaultInterpolation: InterpolateDiscrete,
  
		InterpolantFactoryMethodLinear: undefined,
		InterpolantFactoryMethodSmooth: undefined
  
		// Note: Actually this track could have a optimized / compressed
		// representation of a single value and a custom interpolant that
		// computes "firstValue ^ isOdd( index )".
  
	} );
  
	/**
	 * Abstract base class of interpolants over parametric samples.
	 *
	 * The parameter domain is one dimensional, typically the time or a path
	 * along a curve defined by the data.
	 *
	 * The sample values can have any dimensionality and derived classes may
	 * apply special interpretations to the data.
	 *
	 * This class provides the interval seek in a Template Method, deferring
	 * the actual interpolation to derived classes.
	 *
	 * Time complexity is O(1) for linear access crossing at most two points
	 * and O(log N) for random access, where N is the number of positions.
	 *
	 * References:
	 *
	 * 		http://www.oodesign.com/template-method-pattern.html
	 *
	 * @author tschw
	 */
  
	function Interpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
  
		this.parameterPositions = parameterPositions;
		this._cachedIndex = 0;
  
		this.resultBuffer = resultBuffer !== undefined ?
			resultBuffer : new sampleValues.constructor( sampleSize );
		this.sampleValues = sampleValues;
		this.valueSize = sampleSize;
  
	}
  
	Object.assign( Interpolant.prototype, {
  
		evaluate: function ( t ) {
  
			var pp = this.parameterPositions,
				i1 = this._cachedIndex,
  
				t1 = pp[ i1 ],
				t0 = pp[ i1 - 1 ];
  
			validate_interval: {
  
				seek: {
  
					var right;
  
					linear_scan: {
  
						//- See http://jsperf.com/comparison-to-undefined/3
						//- slower code:
						//-
						//- 				if ( t >= t1 || t1 === undefined ) {
						forward_scan: if ( ! ( t < t1 ) ) {
  
							for ( var giveUpAt = i1 + 2; ; ) {
  
								if ( t1 === undefined ) {
  
									if ( t < t0 ) break forward_scan;
  
									// after end
  
									i1 = pp.length;
									this._cachedIndex = i1;
									return this.afterEnd_( i1 - 1, t, t0 );
  
								}
  
								if ( i1 === giveUpAt ) break; // this loop
  
								t0 = t1;
								t1 = pp[ ++ i1 ];
  
								if ( t < t1 ) {
  
									// we have arrived at the sought interval
									break seek;
  
								}
  
							}
  
							// prepare binary search on the right side of the index
							right = pp.length;
							break linear_scan;
  
						}
  
						//- slower code:
						//-					if ( t < t0 || t0 === undefined ) {
						if ( ! ( t >= t0 ) ) {
  
							// looping?
  
							var t1global = pp[ 1 ];
  
							if ( t < t1global ) {
  
								i1 = 2; // + 1, using the scan for the details
								t0 = t1global;
  
							}
  
							// linear reverse scan
  
							for ( var giveUpAt = i1 - 2; ; ) {
  
								if ( t0 === undefined ) {
  
									// before start
  
									this._cachedIndex = 0;
									return this.beforeStart_( 0, t, t1 );
  
								}
  
								if ( i1 === giveUpAt ) break; // this loop
  
								t1 = t0;
								t0 = pp[ -- i1 - 1 ];
  
								if ( t >= t0 ) {
  
									// we have arrived at the sought interval
									break seek;
  
								}
  
							}
  
							// prepare binary search on the left side of the index
							right = i1;
							i1 = 0;
							break linear_scan;
  
						}
  
						// the interval is valid
  
						break validate_interval;
  
					} // linear scan
  
					// binary search
  
					while ( i1 < right ) {
  
						var mid = ( i1 + right ) >>> 1;
  
						if ( t < pp[ mid ] ) {
  
							right = mid;
  
						} else {
  
							i1 = mid + 1;
  
						}
  
					}
  
					t1 = pp[ i1 ];
					t0 = pp[ i1 - 1 ];
  
					// check boundary cases, again
  
					if ( t0 === undefined ) {
  
						this._cachedIndex = 0;
						return this.beforeStart_( 0, t, t1 );
  
					}
  
					if ( t1 === undefined ) {
  
						i1 = pp.length;
						this._cachedIndex = i1;
						return this.afterEnd_( i1 - 1, t0, t );
  
					}
  
				} // seek
  
				this._cachedIndex = i1;
  
				this.intervalChanged_( i1, t0, t1 );
  
			} // validate_interval
  
			return this.interpolate_( i1, t0, t, t1 );
  
		},
  
		settings: null, // optional, subclass-specific settings structure
		// Note: The indirection allows central control of many interpolants.
  
		// --- Protected interface
  
		DefaultSettings_: {},
  
		getSettings_: function () {
  
			return this.settings || this.DefaultSettings_;
  
		},
  
		copySampleValue_: function ( index ) {
  
			// copies a sample value to the result buffer
  
			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,
				offset = index * stride;
  
			for ( var i = 0; i !== stride; ++ i ) {
  
				result[ i ] = values[ offset + i ];
  
			}
  
			return result;
  
		},
  
		// Template methods for derived classes:
  
		interpolate_: function ( /* i1, t0, t, t1 */ ) {
  
			throw new Error( 'call to abstract method' );
			// implementations shall return this.resultBuffer
  
		},
  
		intervalChanged_: function ( /* i1, t0, t1 */ ) {
  
			// empty
  
		}
  
	} );
  
	//!\ DECLARE ALIAS AFTER assign prototype !
	Object.assign( Interpolant.prototype, {
  
		//( 0, t, t0 ), returns this.resultBuffer
		beforeStart_: Interpolant.prototype.copySampleValue_,
  
		//( N-1, tN-1, t ), returns this.resultBuffer
		afterEnd_: Interpolant.prototype.copySampleValue_,
  
	} );
  
	/**
	 * Spherical linear unit quaternion interpolant.
	 *
	 * @author tschw
	 */
  
	function QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
  
		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
  
	}
  
	QuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
  
		constructor: QuaternionLinearInterpolant,
  
		interpolate_: function ( i1, t0, t, t1 ) {
  
			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,
  
				offset = i1 * stride,
  
				alpha = ( t - t0 ) / ( t1 - t0 );
  
			for ( var end = offset + stride; offset !== end; offset += 4 ) {
  
				Quaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );
  
			}
  
			return result;
  
		}
  
	} );
  
	/**
	 *
	 * A Track of quaternion keyframe values.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function QuaternionKeyframeTrack( name, times, values, interpolation ) {
  
		KeyframeTrack.call( this, name, times, values, interpolation );
  
	}
  
	QuaternionKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: QuaternionKeyframeTrack,
  
		ValueTypeName: 'quaternion',
  
		// ValueBufferType is inherited
  
		DefaultInterpolation: InterpolateLinear,
  
		InterpolantFactoryMethodLinear: function ( result ) {
  
			return new QuaternionLinearInterpolant( this.times, this.values, this.getValueSize(), result );
  
		},
  
		InterpolantFactoryMethodSmooth: undefined // not yet implemented
  
	} );
  
	/**
	 *
	 * A Track of keyframe values that represent color.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function ColorKeyframeTrack( name, times, values, interpolation ) {
  
		KeyframeTrack.call( this, name, times, values, interpolation );
  
	}
  
	ColorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: ColorKeyframeTrack,
  
		ValueTypeName: 'color'
  
		// ValueBufferType is inherited
  
		// DefaultInterpolation is inherited
  
		// Note: Very basic implementation and nothing special yet.
		// However, this is the place for color space parameterization.
  
	} );
  
	/**
	 *
	 * A Track of numeric keyframe values.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function NumberKeyframeTrack( name, times, values, interpolation ) {
  
		KeyframeTrack.call( this, name, times, values, interpolation );
  
	}
  
	NumberKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: NumberKeyframeTrack,
  
		ValueTypeName: 'number'
  
		// ValueBufferType is inherited
  
		// DefaultInterpolation is inherited
  
	} );
  
	/**
	 * Fast and simple cubic spline interpolant.
	 *
	 * It was derived from a Hermitian construction setting the first derivative
	 * at each sample position to the linear slope between neighboring positions
	 * over their parameter interval.
	 *
	 * @author tschw
	 */
  
	function CubicInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
  
		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
  
		this._weightPrev = - 0;
		this._offsetPrev = - 0;
		this._weightNext = - 0;
		this._offsetNext = - 0;
  
	}
  
	CubicInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
  
		constructor: CubicInterpolant,
  
		DefaultSettings_: {
  
			endingStart: ZeroCurvatureEnding,
			endingEnd: ZeroCurvatureEnding
  
		},
  
		intervalChanged_: function ( i1, t0, t1 ) {
  
			var pp = this.parameterPositions,
				iPrev = i1 - 2,
				iNext = i1 + 1,
  
				tPrev = pp[ iPrev ],
				tNext = pp[ iNext ];
  
			if ( tPrev === undefined ) {
  
				switch ( this.getSettings_().endingStart ) {
  
					case ZeroSlopeEnding:
  
						// f'(t0) = 0
						iPrev = i1;
						tPrev = 2 * t0 - t1;
  
						break;
  
					case WrapAroundEnding:
  
						// use the other end of the curve
						iPrev = pp.length - 2;
						tPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];
  
						break;
  
					default: // ZeroCurvatureEnding
  
						// f''(t0) = 0 a.k.a. Natural Spline
						iPrev = i1;
						tPrev = t1;
  
				}
  
			}
  
			if ( tNext === undefined ) {
  
				switch ( this.getSettings_().endingEnd ) {
  
					case ZeroSlopeEnding:
  
						// f'(tN) = 0
						iNext = i1;
						tNext = 2 * t1 - t0;
  
						break;
  
					case WrapAroundEnding:
  
						// use the other end of the curve
						iNext = 1;
						tNext = t1 + pp[ 1 ] - pp[ 0 ];
  
						break;
  
					default: // ZeroCurvatureEnding
  
						// f''(tN) = 0, a.k.a. Natural Spline
						iNext = i1 - 1;
						tNext = t0;
  
				}
  
			}
  
			var halfDt = ( t1 - t0 ) * 0.5,
				stride = this.valueSize;
  
			this._weightPrev = halfDt / ( t0 - tPrev );
			this._weightNext = halfDt / ( tNext - t1 );
			this._offsetPrev = iPrev * stride;
			this._offsetNext = iNext * stride;
  
		},
  
		interpolate_: function ( i1, t0, t, t1 ) {
  
			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,
  
				o1 = i1 * stride,		o0 = o1 - stride,
				oP = this._offsetPrev, 	oN = this._offsetNext,
				wP = this._weightPrev,	wN = this._weightNext,
  
				p = ( t - t0 ) / ( t1 - t0 ),
				pp = p * p,
				ppp = pp * p;
  
			// evaluate polynomials
  
			var sP = - wP * ppp + 2 * wP * pp - wP * p;
			var s0 = ( 1 + wP ) * ppp + ( - 1.5 - 2 * wP ) * pp + ( - 0.5 + wP ) * p + 1;
			var s1 = ( - 1 - wN ) * ppp + ( 1.5 + wN ) * pp + 0.5 * p;
			var sN = wN * ppp - wN * pp;
  
			// combine data linearly
  
			for ( var i = 0; i !== stride; ++ i ) {
  
				result[ i ] =
						sP * values[ oP + i ] +
						s0 * values[ o0 + i ] +
						s1 * values[ o1 + i ] +
						sN * values[ oN + i ];
  
			}
  
			return result;
  
		}
  
	} );
  
	/**
	 * @author tschw
	 */
  
	function LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
  
		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
  
	}
  
	LinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
  
		constructor: LinearInterpolant,
  
		interpolate_: function ( i1, t0, t, t1 ) {
  
			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,
  
				offset1 = i1 * stride,
				offset0 = offset1 - stride,
  
				weight1 = ( t - t0 ) / ( t1 - t0 ),
				weight0 = 1 - weight1;
  
			for ( var i = 0; i !== stride; ++ i ) {
  
				result[ i ] =
						values[ offset0 + i ] * weight0 +
						values[ offset1 + i ] * weight1;
  
			}
  
			return result;
  
		}
  
	} );
  
	/**
	 *
	 * Interpolant that evaluates to the sample value at the position preceeding
	 * the parameter.
	 *
	 * @author tschw
	 */
  
	function DiscreteInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
  
		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
  
	}
  
	DiscreteInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
  
		constructor: DiscreteInterpolant,
  
		interpolate_: function ( i1 /*, t0, t, t1 */ ) {
  
			return this.copySampleValue_( i1 - 1 );
  
		}
  
	} );
  
	/**
	 * @author tschw
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 */
  
	var AnimationUtils = {
  
		// same as Array.prototype.slice, but also works on typed arrays
		arraySlice: function ( array, from, to ) {
  
			if ( AnimationUtils.isTypedArray( array ) ) {
  
				// in ios9 array.subarray(from, undefined) will return empty array
				// but array.subarray(from) or array.subarray(from, len) is correct
				return new array.constructor( array.subarray( from, to !== undefined ? to : array.length ) );
  
			}
  
			return array.slice( from, to );
  
		},
  
		// converts an array to a specific type
		convertArray: function ( array, type, forceClone ) {
  
			if ( ! array || // let 'undefined' and 'null' pass
					! forceClone && array.constructor === type ) return array;
  
			if ( typeof type.BYTES_PER_ELEMENT === 'number' ) {
  
				return new type( array ); // create typed array
  
			}
  
			return Array.prototype.slice.call( array ); // create Array
  
		},
  
		isTypedArray: function ( object ) {
  
			return ArrayBuffer.isView( object ) &&
					! ( object instanceof DataView );
  
		},
  
		// returns an array by which times and values can be sorted
		getKeyframeOrder: function ( times ) {
  
			function compareTime( i, j ) {
  
				return times[ i ] - times[ j ];
  
			}
  
			var n = times.length;
			var result = new Array( n );
			for ( var i = 0; i !== n; ++ i ) result[ i ] = i;
  
			result.sort( compareTime );
  
			return result;
  
		},
  
		// uses the array previously returned by 'getKeyframeOrder' to sort data
		sortedArray: function ( values, stride, order ) {
  
			var nValues = values.length;
			var result = new values.constructor( nValues );
  
			for ( var i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {
  
				var srcOffset = order[ i ] * stride;
  
				for ( var j = 0; j !== stride; ++ j ) {
  
					result[ dstOffset ++ ] = values[ srcOffset + j ];
  
				}
  
			}
  
			return result;
  
		},
  
		// function for parsing AOS keyframe formats
		flattenJSON: function ( jsonKeys, times, values, valuePropertyName ) {
  
			var i = 1, key = jsonKeys[ 0 ];
  
			while ( key !== undefined && key[ valuePropertyName ] === undefined ) {
  
				key = jsonKeys[ i ++ ];
  
			}
  
			if ( key === undefined ) return; // no data
  
			var value = key[ valuePropertyName ];
			if ( value === undefined ) return; // no data
  
			if ( Array.isArray( value ) ) {
  
				do {
  
					value = key[ valuePropertyName ];
  
					if ( value !== undefined ) {
  
						times.push( key.time );
						values.push.apply( values, value ); // push all elements
  
					}
  
					key = jsonKeys[ i ++ ];
  
				} while ( key !== undefined );
  
			} else if ( value.toArray !== undefined ) {
  
				// ...assume THREE.Math-ish
  
				do {
  
					value = key[ valuePropertyName ];
  
					if ( value !== undefined ) {
  
						times.push( key.time );
						value.toArray( values, values.length );
  
					}
  
					key = jsonKeys[ i ++ ];
  
				} while ( key !== undefined );
  
			} else {
  
				// otherwise push as-is
  
				do {
  
					value = key[ valuePropertyName ];
  
					if ( value !== undefined ) {
  
						times.push( key.time );
						values.push( value );
  
					}
  
					key = jsonKeys[ i ++ ];
  
				} while ( key !== undefined );
  
			}
  
		}
  
	};
  
	/**
	 *
	 * A timed sequence of keyframes for a specific property.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function KeyframeTrack( name, times, values, interpolation ) {
  
		if ( name === undefined ) throw new Error( 'THREE.KeyframeTrack: track name is undefined' );
		if ( times === undefined || times.length === 0 ) throw new Error( 'THREE.KeyframeTrack: no keyframes in track named ' + name );
  
		this.name = name;
  
		this.times = AnimationUtils.convertArray( times, this.TimeBufferType );
		this.values = AnimationUtils.convertArray( values, this.ValueBufferType );
  
		this.setInterpolation( interpolation || this.DefaultInterpolation );
  
		this.validate();
		this.optimize();
  
	}
  
	// Static methods:
  
	Object.assign( KeyframeTrack, {
  
		// Serialization (in static context, because of constructor invocation
		// and automatic invocation of .toJSON):
  
		parse: function ( json ) {
  
			if ( json.type === undefined ) {
  
				throw new Error( 'THREE.KeyframeTrack: track type undefined, can not parse' );
  
			}
  
			var trackType = KeyframeTrack._getTrackTypeForValueTypeName( json.type );
  
			if ( json.times === undefined ) {
  
				var times = [], values = [];
  
				AnimationUtils.flattenJSON( json.keys, times, values, 'value' );
  
				json.times = times;
				json.values = values;
  
			}
  
			// derived classes can define a static parse method
			if ( trackType.parse !== undefined ) {
  
				return trackType.parse( json );
  
			} else {
  
				// by default, we assume a constructor compatible with the base
				return new trackType( json.name, json.times, json.values, json.interpolation );
  
			}
  
		},
  
		toJSON: function ( track ) {
  
			var trackType = track.constructor;
  
			var json;
  
			// derived classes can define a static toJSON method
			if ( trackType.toJSON !== undefined ) {
  
				json = trackType.toJSON( track );
  
			} else {
  
				// by default, we assume the data can be serialized as-is
				json = {
  
					'name': track.name,
					'times': AnimationUtils.convertArray( track.times, Array ),
					'values': AnimationUtils.convertArray( track.values, Array )
  
				};
  
				var interpolation = track.getInterpolation();
  
				if ( interpolation !== track.DefaultInterpolation ) {
  
					json.interpolation = interpolation;
  
				}
  
			}
  
			json.type = track.ValueTypeName; // mandatory
  
			return json;
  
		},
  
		_getTrackTypeForValueTypeName: function ( typeName ) {
  
			switch ( typeName.toLowerCase() ) {
  
				case 'scalar':
				case 'double':
				case 'float':
				case 'number':
				case 'integer':
  
					return NumberKeyframeTrack;
  
				case 'vector':
				case 'vector2':
				case 'vector3':
				case 'vector4':
  
					return VectorKeyframeTrack;
  
				case 'color':
  
					return ColorKeyframeTrack;
  
				case 'quaternion':
  
					return QuaternionKeyframeTrack;
  
				case 'bool':
				case 'boolean':
  
					return BooleanKeyframeTrack;
  
				case 'string':
  
					return StringKeyframeTrack;
  
			}
  
			throw new Error( 'THREE.KeyframeTrack: Unsupported typeName: ' + typeName );
  
		}
  
	} );
  
	Object.assign( KeyframeTrack.prototype, {
  
		constructor: KeyframeTrack,
  
		TimeBufferType: Float32Array,
  
		ValueBufferType: Float32Array,
  
		DefaultInterpolation: InterpolateLinear,
  
		InterpolantFactoryMethodDiscrete: function ( result ) {
  
			return new DiscreteInterpolant( this.times, this.values, this.getValueSize(), result );
  
		},
  
		InterpolantFactoryMethodLinear: function ( result ) {
  
			return new LinearInterpolant( this.times, this.values, this.getValueSize(), result );
  
		},
  
		InterpolantFactoryMethodSmooth: function ( result ) {
  
			return new CubicInterpolant( this.times, this.values, this.getValueSize(), result );
  
		},
  
		setInterpolation: function ( interpolation ) {
  
			var factoryMethod;
  
			switch ( interpolation ) {
  
				case InterpolateDiscrete:
  
					factoryMethod = this.InterpolantFactoryMethodDiscrete;
  
					break;
  
				case InterpolateLinear:
  
					factoryMethod = this.InterpolantFactoryMethodLinear;
  
					break;
  
				case InterpolateSmooth:
  
					factoryMethod = this.InterpolantFactoryMethodSmooth;
  
					break;
  
			}
  
			if ( factoryMethod === undefined ) {
  
				var message = "unsupported interpolation for " +
					this.ValueTypeName + " keyframe track named " + this.name;
  
				if ( this.createInterpolant === undefined ) {
  
					// fall back to default, unless the default itself is messed up
					if ( interpolation !== this.DefaultInterpolation ) {
  
						this.setInterpolation( this.DefaultInterpolation );
  
					} else {
  
						throw new Error( message ); // fatal, in this case
  
					}
  
				}
  
				console.warn( 'THREE.KeyframeTrack:', message );
				return;
  
			}
  
			this.createInterpolant = factoryMethod;
  
		},
  
		getInterpolation: function () {
  
			switch ( this.createInterpolant ) {
  
				case this.InterpolantFactoryMethodDiscrete:
  
					return InterpolateDiscrete;
  
				case this.InterpolantFactoryMethodLinear:
  
					return InterpolateLinear;
  
				case this.InterpolantFactoryMethodSmooth:
  
					return InterpolateSmooth;
  
			}
  
		},
  
		getValueSize: function () {
  
			return this.values.length / this.times.length;
  
		},
  
		// move all keyframes either forwards or backwards in time
		shift: function ( timeOffset ) {
  
			if ( timeOffset !== 0.0 ) {
  
				var times = this.times;
  
				for ( var i = 0, n = times.length; i !== n; ++ i ) {
  
					times[ i ] += timeOffset;
  
				}
  
			}
  
			return this;
  
		},
  
		// scale all keyframe times by a factor (useful for frame <-> seconds conversions)
		scale: function ( timeScale ) {
  
			if ( timeScale !== 1.0 ) {
  
				var times = this.times;
  
				for ( var i = 0, n = times.length; i !== n; ++ i ) {
  
					times[ i ] *= timeScale;
  
				}
  
			}
  
			return this;
  
		},
  
		// removes keyframes before and after animation without changing any values within the range [startTime, endTime].
		// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
		trim: function ( startTime, endTime ) {
  
			var times = this.times,
				nKeys = times.length,
				from = 0,
				to = nKeys - 1;
  
			while ( from !== nKeys && times[ from ] < startTime ) {
  
				++ from;
  
			}
  
			while ( to !== - 1 && times[ to ] > endTime ) {
  
				-- to;
  
			}
  
			++ to; // inclusive -> exclusive bound
  
			if ( from !== 0 || to !== nKeys ) {
  
				// empty tracks are forbidden, so keep at least one keyframe
				if ( from >= to ) to = Math.max( to, 1 ), from = to - 1;
  
				var stride = this.getValueSize();
				this.times = AnimationUtils.arraySlice( times, from, to );
				this.values = AnimationUtils.arraySlice( this.values, from * stride, to * stride );
  
			}
  
			return this;
  
		},
  
		// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
		validate: function () {
  
			var valid = true;
  
			var valueSize = this.getValueSize();
			if ( valueSize - Math.floor( valueSize ) !== 0 ) {
  
				console.error( 'THREE.KeyframeTrack: Invalid value size in track.', this );
				valid = false;
  
			}
  
			var times = this.times,
				values = this.values,
  
				nKeys = times.length;
  
			if ( nKeys === 0 ) {
  
				console.error( 'THREE.KeyframeTrack: Track is empty.', this );
				valid = false;
  
			}
  
			var prevTime = null;
  
			for ( var i = 0; i !== nKeys; i ++ ) {
  
				var currTime = times[ i ];
  
				if ( typeof currTime === 'number' && isNaN( currTime ) ) {
  
					console.error( 'THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime );
					valid = false;
					break;
  
				}
  
				if ( prevTime !== null && prevTime > currTime ) {
  
					console.error( 'THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime );
					valid = false;
					break;
  
				}
  
				prevTime = currTime;
  
			}
  
			if ( values !== undefined ) {
  
				if ( AnimationUtils.isTypedArray( values ) ) {
  
					for ( var i = 0, n = values.length; i !== n; ++ i ) {
  
						var value = values[ i ];
  
						if ( isNaN( value ) ) {
  
							console.error( 'THREE.KeyframeTrack: Value is not a valid number.', this, i, value );
							valid = false;
							break;
  
						}
  
					}
  
				}
  
			}
  
			return valid;
  
		},
  
		// removes equivalent sequential keys as common in morph target sequences
		// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
		optimize: function () {
  
			var times = this.times,
				values = this.values,
				stride = this.getValueSize(),
  
				smoothInterpolation = this.getInterpolation() === InterpolateSmooth,
  
				writeIndex = 1,
				lastIndex = times.length - 1;
  
			for ( var i = 1; i < lastIndex; ++ i ) {
  
				var keep = false;
  
				var time = times[ i ];
				var timeNext = times[ i + 1 ];
  
				// remove adjacent keyframes scheduled at the same time
  
				if ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {
  
					if ( ! smoothInterpolation ) {
  
						// remove unnecessary keyframes same as their neighbors
  
						var offset = i * stride,
							offsetP = offset - stride,
							offsetN = offset + stride;
  
						for ( var j = 0; j !== stride; ++ j ) {
  
							var value = values[ offset + j ];
  
							if ( value !== values[ offsetP + j ] ||
								value !== values[ offsetN + j ] ) {
  
								keep = true;
								break;
  
							}
  
						}
  
					} else {
  
						keep = true;
  
					}
  
				}
  
				// in-place compaction
  
				if ( keep ) {
  
					if ( i !== writeIndex ) {
  
						times[ writeIndex ] = times[ i ];
  
						var readOffset = i * stride,
							writeOffset = writeIndex * stride;
  
						for ( var j = 0; j !== stride; ++ j ) {
  
							values[ writeOffset + j ] = values[ readOffset + j ];
  
						}
  
					}
  
					++ writeIndex;
  
				}
  
			}
  
			// flush last keyframe (compaction looks ahead)
  
			if ( lastIndex > 0 ) {
  
				times[ writeIndex ] = times[ lastIndex ];
  
				for ( var readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++ j ) {
  
					values[ writeOffset + j ] = values[ readOffset + j ];
  
				}
  
				++ writeIndex;
  
			}
  
			if ( writeIndex !== times.length ) {
  
				this.times = AnimationUtils.arraySlice( times, 0, writeIndex );
				this.values = AnimationUtils.arraySlice( values, 0, writeIndex * stride );
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 *
	 * A Track of vectored keyframe values.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function VectorKeyframeTrack( name, times, values, interpolation ) {
  
		KeyframeTrack.call( this, name, times, values, interpolation );
  
	}
  
	VectorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {
  
		constructor: VectorKeyframeTrack,
  
		ValueTypeName: 'vector'
  
		// ValueBufferType is inherited
  
		// DefaultInterpolation is inherited
  
	} );
  
	/**
	 *
	 * Reusable set of Tracks that represent an animation.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 */
  
	function AnimationClip( name, duration, tracks ) {
  
		this.name = name;
		this.tracks = tracks;
		this.duration = ( duration !== undefined ) ? duration : - 1;
  
		this.uuid = _Math.generateUUID();
  
		// this means it should figure out its duration by scanning the tracks
		if ( this.duration < 0 ) {
  
			this.resetDuration();
  
		}
  
		this.optimize();
  
	}
  
	Object.assign( AnimationClip, {
  
		parse: function ( json ) {
  
			var tracks = [],
				jsonTracks = json.tracks,
				frameTime = 1.0 / ( json.fps || 1.0 );
  
			for ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {
  
				tracks.push( KeyframeTrack.parse( jsonTracks[ i ] ).scale( frameTime ) );
  
			}
  
			return new AnimationClip( json.name, json.duration, tracks );
  
		},
  
		toJSON: function ( clip ) {
  
			var tracks = [],
				clipTracks = clip.tracks;
  
			var json = {
  
				'name': clip.name,
				'duration': clip.duration,
				'tracks': tracks,
				'uuid': clip.uuid
  
			};
  
			for ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {
  
				tracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );
  
			}
  
			return json;
  
		},
  
		CreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {
  
			var numMorphTargets = morphTargetSequence.length;
			var tracks = [];
  
			for ( var i = 0; i < numMorphTargets; i ++ ) {
  
				var times = [];
				var values = [];
  
				times.push(
					( i + numMorphTargets - 1 ) % numMorphTargets,
					i,
					( i + 1 ) % numMorphTargets );
  
				values.push( 0, 1, 0 );
  
				var order = AnimationUtils.getKeyframeOrder( times );
				times = AnimationUtils.sortedArray( times, 1, order );
				values = AnimationUtils.sortedArray( values, 1, order );
  
				// if there is a key at the first frame, duplicate it as the
				// last frame as well for perfect loop.
				if ( ! noLoop && times[ 0 ] === 0 ) {
  
					times.push( numMorphTargets );
					values.push( values[ 0 ] );
  
				}
  
				tracks.push(
					new NumberKeyframeTrack(
						'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',
						times, values
					).scale( 1.0 / fps ) );
  
			}
  
			return new AnimationClip( name, - 1, tracks );
  
		},
  
		findByName: function ( objectOrClipArray, name ) {
  
			var clipArray = objectOrClipArray;
  
			if ( ! Array.isArray( objectOrClipArray ) ) {
  
				var o = objectOrClipArray;
				clipArray = o.geometry && o.geometry.animations || o.animations;
  
			}
  
			for ( var i = 0; i < clipArray.length; i ++ ) {
  
				if ( clipArray[ i ].name === name ) {
  
					return clipArray[ i ];
  
				}
  
			}
  
			return null;
  
		},
  
		CreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {
  
			var animationToMorphTargets = {};
  
			// tested with https://regex101.com/ on trick sequences
			// such flamingo_flyA_003, flamingo_run1_003, crdeath0059
			var pattern = /^([\w-]*?)([\d]+)$/;
  
			// sort morph target names into animation groups based
			// patterns like Walk_001, Walk_002, Run_001, Run_002
			for ( var i = 0, il = morphTargets.length; i < il; i ++ ) {
  
				var morphTarget = morphTargets[ i ];
				var parts = morphTarget.name.match( pattern );
  
				if ( parts && parts.length > 1 ) {
  
					var name = parts[ 1 ];
  
					var animationMorphTargets = animationToMorphTargets[ name ];
					if ( ! animationMorphTargets ) {
  
						animationToMorphTargets[ name ] = animationMorphTargets = [];
  
					}
  
					animationMorphTargets.push( morphTarget );
  
				}
  
			}
  
			var clips = [];
  
			for ( var name in animationToMorphTargets ) {
  
				clips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );
  
			}
  
			return clips;
  
		},
  
		// parse the animation.hierarchy format
		parseAnimation: function ( animation, bones ) {
  
			if ( ! animation ) {
  
				console.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );
				return null;
  
			}
  
			var addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {
  
				// only return track if there are actually keys.
				if ( animationKeys.length !== 0 ) {
  
					var times = [];
					var values = [];
  
					AnimationUtils.flattenJSON( animationKeys, times, values, propertyName );
  
					// empty keys are filtered out, so check again
					if ( times.length !== 0 ) {
  
						destTracks.push( new trackType( trackName, times, values ) );
  
					}
  
				}
  
			};
  
			var tracks = [];
  
			var clipName = animation.name || 'default';
			// automatic length determination in AnimationClip.
			var duration = animation.length || - 1;
			var fps = animation.fps || 30;
  
			var hierarchyTracks = animation.hierarchy || [];
  
			for ( var h = 0; h < hierarchyTracks.length; h ++ ) {
  
				var animationKeys = hierarchyTracks[ h ].keys;
  
				// skip empty tracks
				if ( ! animationKeys || animationKeys.length === 0 ) continue;
  
				// process morph targets
				if ( animationKeys[ 0 ].morphTargets ) {
  
					// figure out all morph targets used in this track
					var morphTargetNames = {};
  
					for ( var k = 0; k < animationKeys.length; k ++ ) {
  
						if ( animationKeys[ k ].morphTargets ) {
  
							for ( var m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {
  
								morphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;
  
							}
  
						}
  
					}
  
					// create a track for each morph target with all zero
					// morphTargetInfluences except for the keys in which
					// the morphTarget is named.
					for ( var morphTargetName in morphTargetNames ) {
  
						var times = [];
						var values = [];
  
						for ( var m = 0; m !== animationKeys[ k ].morphTargets.length; ++ m ) {
  
							var animationKey = animationKeys[ k ];
  
							times.push( animationKey.time );
							values.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );
  
						}
  
						tracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );
  
					}
  
					duration = morphTargetNames.length * ( fps || 1.0 );
  
				} else {
  
					// ...assume skeletal animation
  
					var boneName = '.bones[' + bones[ h ].name + ']';
  
					addNonemptyTrack(
						VectorKeyframeTrack, boneName + '.position',
						animationKeys, 'pos', tracks );
  
					addNonemptyTrack(
						QuaternionKeyframeTrack, boneName + '.quaternion',
						animationKeys, 'rot', tracks );
  
					addNonemptyTrack(
						VectorKeyframeTrack, boneName + '.scale',
						animationKeys, 'scl', tracks );
  
				}
  
			}
  
			if ( tracks.length === 0 ) {
  
				return null;
  
			}
  
			var clip = new AnimationClip( clipName, duration, tracks );
  
			return clip;
  
		}
  
	} );
  
	Object.assign( AnimationClip.prototype, {
  
		resetDuration: function () {
  
			var tracks = this.tracks, duration = 0;
  
			for ( var i = 0, n = tracks.length; i !== n; ++ i ) {
  
				var track = this.tracks[ i ];
  
				duration = Math.max( duration, track.times[ track.times.length - 1 ] );
  
			}
  
			this.duration = duration;
  
		},
  
		trim: function () {
  
			for ( var i = 0; i < this.tracks.length; i ++ ) {
  
				this.tracks[ i ].trim( 0, this.duration );
  
			}
  
			return this;
  
		},
  
		optimize: function () {
  
			for ( var i = 0; i < this.tracks.length; i ++ ) {
  
				this.tracks[ i ].optimize();
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function MaterialLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
		this.textures = {};
  
	}
  
	Object.assign( MaterialLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {
  
				onLoad( scope.parse( JSON.parse( text ) ) );
  
			}, onProgress, onError );
  
		},
  
		setTextures: function ( value ) {
  
			this.textures = value;
  
		},
  
		parse: function ( json ) {
  
			var textures = this.textures;
  
			function getTexture( name ) {
  
				if ( textures[ name ] === undefined ) {
  
					console.warn( 'THREE.MaterialLoader: Undefined texture', name );
  
				}
  
				return textures[ name ];
  
			}
  
			var material = new Materials[ json.type ]();
  
			if ( json.uuid !== undefined ) material.uuid = json.uuid;
			if ( json.name !== undefined ) material.name = json.name;
			if ( json.color !== undefined ) material.color.setHex( json.color );
			if ( json.roughness !== undefined ) material.roughness = json.roughness;
			if ( json.metalness !== undefined ) material.metalness = json.metalness;
			if ( json.emissive !== undefined ) material.emissive.setHex( json.emissive );
			if ( json.specular !== undefined ) material.specular.setHex( json.specular );
			if ( json.shininess !== undefined ) material.shininess = json.shininess;
			if ( json.clearCoat !== undefined ) material.clearCoat = json.clearCoat;
			if ( json.clearCoatRoughness !== undefined ) material.clearCoatRoughness = json.clearCoatRoughness;
			if ( json.uniforms !== undefined ) material.uniforms = json.uniforms;
			if ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;
			if ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;
			if ( json.vertexColors !== undefined ) material.vertexColors = json.vertexColors;
			if ( json.fog !== undefined ) material.fog = json.fog;
			if ( json.flatShading !== undefined ) material.flatShading = json.flatShading;
			if ( json.blending !== undefined ) material.blending = json.blending;
			if ( json.side !== undefined ) material.side = json.side;
			if ( json.opacity !== undefined ) material.opacity = json.opacity;
			if ( json.transparent !== undefined ) material.transparent = json.transparent;
			if ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;
			if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
			if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
			if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
			if ( json.wireframe !== undefined ) material.wireframe = json.wireframe;
			if ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;
			if ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;
			if ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;
  
			if ( json.rotation !== undefined ) material.rotation = json.rotation;
  
			if ( json.linewidth !== 1 ) material.linewidth = json.linewidth;
			if ( json.dashSize !== undefined ) material.dashSize = json.dashSize;
			if ( json.gapSize !== undefined ) material.gapSize = json.gapSize;
			if ( json.scale !== undefined ) material.scale = json.scale;
  
			if ( json.polygonOffset !== undefined ) material.polygonOffset = json.polygonOffset;
			if ( json.polygonOffsetFactor !== undefined ) material.polygonOffsetFactor = json.polygonOffsetFactor;
			if ( json.polygonOffsetUnits !== undefined ) material.polygonOffsetUnits = json.polygonOffsetUnits;
  
			if ( json.skinning !== undefined ) material.skinning = json.skinning;
			if ( json.morphTargets !== undefined ) material.morphTargets = json.morphTargets;
			if ( json.dithering !== undefined ) material.dithering = json.dithering;
  
			if ( json.visible !== undefined ) material.visible = json.visible;
			if ( json.userData !== undefined ) material.userData = json.userData;
  
			// Deprecated
  
			if ( json.shading !== undefined ) material.flatShading = json.shading === 1; // THREE.FlatShading
  
			// for PointsMaterial
  
			if ( json.size !== undefined ) material.size = json.size;
			if ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;
  
			// maps
  
			if ( json.map !== undefined ) material.map = getTexture( json.map );
  
			if ( json.alphaMap !== undefined ) {
  
				material.alphaMap = getTexture( json.alphaMap );
				material.transparent = true;
  
			}
  
			if ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );
			if ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;
  
			if ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );
			if ( json.normalScale !== undefined ) {
  
				var normalScale = json.normalScale;
  
				if ( Array.isArray( normalScale ) === false ) {
  
					// Blender exporter used to export a scalar. See #7459
  
					normalScale = [ normalScale, normalScale ];
  
				}
  
				material.normalScale = new Vector2().fromArray( normalScale );
  
			}
  
			if ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );
			if ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;
			if ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;
  
			if ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );
			if ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );
  
			if ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );
			if ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;
  
			if ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );
  
			if ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );
  
			if ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;
  
			if ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );
			if ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;
  
			if ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );
			if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;
  
			if ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );
  
			return material;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function BufferGeometryLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( BufferGeometryLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {
  
				onLoad( scope.parse( JSON.parse( text ) ) );
  
			}, onProgress, onError );
  
		},
  
		parse: function ( json ) {
  
			var geometry = new BufferGeometry();
  
			var index = json.data.index;
  
			if ( index !== undefined ) {
  
				var typedArray = new TYPED_ARRAYS[ index.type ]( index.array );
				geometry.setIndex( new BufferAttribute( typedArray, 1 ) );
  
			}
  
			var attributes = json.data.attributes;
  
			for ( var key in attributes ) {
  
				var attribute = attributes[ key ];
				var typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );
  
				geometry.addAttribute( key, new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized ) );
  
			}
  
			var groups = json.data.groups || json.data.drawcalls || json.data.offsets;
  
			if ( groups !== undefined ) {
  
				for ( var i = 0, n = groups.length; i !== n; ++ i ) {
  
					var group = groups[ i ];
  
					geometry.addGroup( group.start, group.count, group.materialIndex );
  
				}
  
			}
  
			var boundingSphere = json.data.boundingSphere;
  
			if ( boundingSphere !== undefined ) {
  
				var center = new Vector3();
  
				if ( boundingSphere.center !== undefined ) {
  
					center.fromArray( boundingSphere.center );
  
				}
  
				geometry.boundingSphere = new Sphere( center, boundingSphere.radius );
  
			}
  
			return geometry;
  
		}
  
	} );
  
	var TYPED_ARRAYS = {
		Int8Array: Int8Array,
		Uint8Array: Uint8Array,
		// Workaround for IE11 pre KB2929437. See #11440
		Uint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,
		Int16Array: Int16Array,
		Uint16Array: Uint16Array,
		Int32Array: Int32Array,
		Uint32Array: Uint32Array,
		Float32Array: Float32Array,
		Float64Array: Float64Array
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Loader() {}
  
	Loader.Handlers = {
  
		handlers: [],
  
		add: function ( regex, loader ) {
  
			this.handlers.push( regex, loader );
  
		},
  
		get: function ( file ) {
  
			var handlers = this.handlers;
  
			for ( var i = 0, l = handlers.length; i < l; i += 2 ) {
  
				var regex = handlers[ i ];
				var loader = handlers[ i + 1 ];
  
				if ( regex.test( file ) ) {
  
					return loader;
  
				}
  
			}
  
			return null;
  
		}
  
	};
  
	Object.assign( Loader.prototype, {
  
		crossOrigin: undefined,
  
		onLoadStart: function () {},
  
		onLoadProgress: function () {},
  
		onLoadComplete: function () {},
  
		initMaterials: function ( materials, texturePath, crossOrigin ) {
  
			var array = [];
  
			for ( var i = 0; i < materials.length; ++ i ) {
  
				array[ i ] = this.createMaterial( materials[ i ], texturePath, crossOrigin );
  
			}
  
			return array;
  
		},
  
		createMaterial: ( function () {
  
			var BlendingMode = {
				NoBlending: NoBlending,
				NormalBlending: NormalBlending,
				AdditiveBlending: AdditiveBlending,
				SubtractiveBlending: SubtractiveBlending,
				MultiplyBlending: MultiplyBlending,
				CustomBlending: CustomBlending
			};
  
			var color = new Color();
			var textureLoader = new TextureLoader();
			var materialLoader = new MaterialLoader();
  
			return function createMaterial( m, texturePath, crossOrigin ) {
  
				// convert from old material format
  
				var textures = {};
  
				function loadTexture( path, repeat, offset, wrap, anisotropy ) {
  
					var fullPath = texturePath + path;
					var loader = Loader.Handlers.get( fullPath );
  
					var texture;
  
					if ( loader !== null ) {
  
						texture = loader.load( fullPath );
  
					} else {
  
						textureLoader.setCrossOrigin( crossOrigin );
						texture = textureLoader.load( fullPath );
  
					}
  
					if ( repeat !== undefined ) {
  
						texture.repeat.fromArray( repeat );
  
						if ( repeat[ 0 ] !== 1 ) texture.wrapS = RepeatWrapping;
						if ( repeat[ 1 ] !== 1 ) texture.wrapT = RepeatWrapping;
  
					}
  
					if ( offset !== undefined ) {
  
						texture.offset.fromArray( offset );
  
					}
  
					if ( wrap !== undefined ) {
  
						if ( wrap[ 0 ] === 'repeat' ) texture.wrapS = RepeatWrapping;
						if ( wrap[ 0 ] === 'mirror' ) texture.wrapS = MirroredRepeatWrapping;
  
						if ( wrap[ 1 ] === 'repeat' ) texture.wrapT = RepeatWrapping;
						if ( wrap[ 1 ] === 'mirror' ) texture.wrapT = MirroredRepeatWrapping;
  
					}
  
					if ( anisotropy !== undefined ) {
  
						texture.anisotropy = anisotropy;
  
					}
  
					var uuid = _Math.generateUUID();
  
					textures[ uuid ] = texture;
  
					return uuid;
  
				}
  
				//
  
				var json = {
					uuid: _Math.generateUUID(),
					type: 'MeshLambertMaterial'
				};
  
				for ( var name in m ) {
  
					var value = m[ name ];
  
					switch ( name ) {
  
						case 'DbgColor':
						case 'DbgIndex':
						case 'opticalDensity':
						case 'illumination':
							break;
						case 'DbgName':
							json.name = value;
							break;
						case 'blending':
							json.blending = BlendingMode[ value ];
							break;
						case 'colorAmbient':
						case 'mapAmbient':
							console.warn( 'THREE.Loader.createMaterial:', name, 'is no longer supported.' );
							break;
						case 'colorDiffuse':
							json.color = color.fromArray( value ).getHex();
							break;
						case 'colorSpecular':
							json.specular = color.fromArray( value ).getHex();
							break;
						case 'colorEmissive':
							json.emissive = color.fromArray( value ).getHex();
							break;
						case 'specularCoef':
							json.shininess = value;
							break;
						case 'shading':
							if ( value.toLowerCase() === 'basic' ) json.type = 'MeshBasicMaterial';
							if ( value.toLowerCase() === 'phong' ) json.type = 'MeshPhongMaterial';
							if ( value.toLowerCase() === 'standard' ) json.type = 'MeshStandardMaterial';
							break;
						case 'mapDiffuse':
							json.map = loadTexture( value, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy );
							break;
						case 'mapDiffuseRepeat':
						case 'mapDiffuseOffset':
						case 'mapDiffuseWrap':
						case 'mapDiffuseAnisotropy':
							break;
						case 'mapEmissive':
							json.emissiveMap = loadTexture( value, m.mapEmissiveRepeat, m.mapEmissiveOffset, m.mapEmissiveWrap, m.mapEmissiveAnisotropy );
							break;
						case 'mapEmissiveRepeat':
						case 'mapEmissiveOffset':
						case 'mapEmissiveWrap':
						case 'mapEmissiveAnisotropy':
							break;
						case 'mapLight':
							json.lightMap = loadTexture( value, m.mapLightRepeat, m.mapLightOffset, m.mapLightWrap, m.mapLightAnisotropy );
							break;
						case 'mapLightRepeat':
						case 'mapLightOffset':
						case 'mapLightWrap':
						case 'mapLightAnisotropy':
							break;
						case 'mapAO':
							json.aoMap = loadTexture( value, m.mapAORepeat, m.mapAOOffset, m.mapAOWrap, m.mapAOAnisotropy );
							break;
						case 'mapAORepeat':
						case 'mapAOOffset':
						case 'mapAOWrap':
						case 'mapAOAnisotropy':
							break;
						case 'mapBump':
							json.bumpMap = loadTexture( value, m.mapBumpRepeat, m.mapBumpOffset, m.mapBumpWrap, m.mapBumpAnisotropy );
							break;
						case 'mapBumpScale':
							json.bumpScale = value;
							break;
						case 'mapBumpRepeat':
						case 'mapBumpOffset':
						case 'mapBumpWrap':
						case 'mapBumpAnisotropy':
							break;
						case 'mapNormal':
							json.normalMap = loadTexture( value, m.mapNormalRepeat, m.mapNormalOffset, m.mapNormalWrap, m.mapNormalAnisotropy );
							break;
						case 'mapNormalFactor':
							json.normalScale = value;
							break;
						case 'mapNormalRepeat':
						case 'mapNormalOffset':
						case 'mapNormalWrap':
						case 'mapNormalAnisotropy':
							break;
						case 'mapSpecular':
							json.specularMap = loadTexture( value, m.mapSpecularRepeat, m.mapSpecularOffset, m.mapSpecularWrap, m.mapSpecularAnisotropy );
							break;
						case 'mapSpecularRepeat':
						case 'mapSpecularOffset':
						case 'mapSpecularWrap':
						case 'mapSpecularAnisotropy':
							break;
						case 'mapMetalness':
							json.metalnessMap = loadTexture( value, m.mapMetalnessRepeat, m.mapMetalnessOffset, m.mapMetalnessWrap, m.mapMetalnessAnisotropy );
							break;
						case 'mapMetalnessRepeat':
						case 'mapMetalnessOffset':
						case 'mapMetalnessWrap':
						case 'mapMetalnessAnisotropy':
							break;
						case 'mapRoughness':
							json.roughnessMap = loadTexture( value, m.mapRoughnessRepeat, m.mapRoughnessOffset, m.mapRoughnessWrap, m.mapRoughnessAnisotropy );
							break;
						case 'mapRoughnessRepeat':
						case 'mapRoughnessOffset':
						case 'mapRoughnessWrap':
						case 'mapRoughnessAnisotropy':
							break;
						case 'mapAlpha':
							json.alphaMap = loadTexture( value, m.mapAlphaRepeat, m.mapAlphaOffset, m.mapAlphaWrap, m.mapAlphaAnisotropy );
							break;
						case 'mapAlphaRepeat':
						case 'mapAlphaOffset':
						case 'mapAlphaWrap':
						case 'mapAlphaAnisotropy':
							break;
						case 'flipSided':
							json.side = BackSide;
							break;
						case 'doubleSided':
							json.side = DoubleSide;
							break;
						case 'transparency':
							console.warn( 'THREE.Loader.createMaterial: transparency has been renamed to opacity' );
							json.opacity = value;
							break;
						case 'depthTest':
						case 'depthWrite':
						case 'colorWrite':
						case 'opacity':
						case 'reflectivity':
						case 'transparent':
						case 'visible':
						case 'wireframe':
							json[ name ] = value;
							break;
						case 'vertexColors':
							if ( value === true ) json.vertexColors = VertexColors;
							if ( value === 'face' ) json.vertexColors = FaceColors;
							break;
						default:
							console.error( 'THREE.Loader.createMaterial: Unsupported', name, value );
							break;
  
					}
  
				}
  
				if ( json.type === 'MeshBasicMaterial' ) delete json.emissive;
				if ( json.type !== 'MeshPhongMaterial' ) delete json.specular;
  
				if ( json.opacity < 1 ) json.transparent = true;
  
				materialLoader.setTextures( textures );
  
				return materialLoader.parse( json );
  
			};
  
		} )()
  
	} );
  
	/**
	 * @author Don McCurdy / https://www.donmccurdy.com
	 */
  
	var LoaderUtils = {
  
		decodeText: function ( array ) {
  
			if ( typeof TextDecoder !== 'undefined' ) {
  
				return new TextDecoder().decode( array );
  
			}
  
			// Avoid the String.fromCharCode.apply(null, array) shortcut, which
			// throws a "maximum call stack size exceeded" error for large arrays.
  
			var s = '';
  
			for ( var i = 0, il = array.length; i < il; i ++ ) {
  
				// Implicitly assumes little-endian.
				s += String.fromCharCode( array[ i ] );
  
			}
  
			// Merges multi-byte utf-8 characters.
			return decodeURIComponent( escape( s ) );
  
		},
  
		extractUrlBase: function ( url ) {
  
			var index = url.lastIndexOf( '/' );
  
			if ( index === - 1 ) return './';
  
			return url.substr( 0, index + 1 );
  
		}
  
	};
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function JSONLoader( manager ) {
  
		if ( typeof manager === 'boolean' ) {
  
			console.warn( 'THREE.JSONLoader: showStatus parameter has been removed from constructor.' );
			manager = undefined;
  
		}
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
		this.withCredentials = false;
  
	}
  
	Object.assign( JSONLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var texturePath = this.texturePath && ( typeof this.texturePath === 'string' ) ? this.texturePath : LoaderUtils.extractUrlBase( url );
  
			var loader = new FileLoader( this.manager );
			loader.setWithCredentials( this.withCredentials );
			loader.load( url, function ( text ) {
  
				var json = JSON.parse( text );
				var metadata = json.metadata;
  
				if ( metadata !== undefined ) {
  
					var type = metadata.type;
  
					if ( type !== undefined ) {
  
						if ( type.toLowerCase() === 'object' ) {
  
							console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.' );
							return;
  
						}
  
					}
  
				}
  
				var object = scope.parse( json, texturePath );
				onLoad( object.geometry, object.materials );
  
			}, onProgress, onError );
  
		},
  
		setTexturePath: function ( value ) {
  
			this.texturePath = value;
  
		},
  
		parse: ( function () {
  
			function parseModel( json, geometry ) {
  
				function isBitSet( value, position ) {
  
					return value & ( 1 << position );
  
				}
  
				var i, j, fi,
  
					offset, zLength,
  
					colorIndex, normalIndex, uvIndex, materialIndex,
  
					type,
					isQuad,
					hasMaterial,
					hasFaceVertexUv,
					hasFaceNormal, hasFaceVertexNormal,
					hasFaceColor, hasFaceVertexColor,
  
					vertex, face, faceA, faceB, hex, normal,
  
					uvLayer, uv, u, v,
  
					faces = json.faces,
					vertices = json.vertices,
					normals = json.normals,
					colors = json.colors,
  
					scale = json.scale,
  
					nUvLayers = 0;
  
  
				if ( json.uvs !== undefined ) {
  
					// disregard empty arrays
  
					for ( i = 0; i < json.uvs.length; i ++ ) {
  
						if ( json.uvs[ i ].length ) nUvLayers ++;
  
					}
  
					for ( i = 0; i < nUvLayers; i ++ ) {
  
						geometry.faceVertexUvs[ i ] = [];
  
					}
  
				}
  
				offset = 0;
				zLength = vertices.length;
  
				while ( offset < zLength ) {
  
					vertex = new Vector3();
  
					vertex.x = vertices[ offset ++ ] * scale;
					vertex.y = vertices[ offset ++ ] * scale;
					vertex.z = vertices[ offset ++ ] * scale;
  
					geometry.vertices.push( vertex );
  
				}
  
				offset = 0;
				zLength = faces.length;
  
				while ( offset < zLength ) {
  
					type = faces[ offset ++ ];
  
					isQuad = isBitSet( type, 0 );
					hasMaterial = isBitSet( type, 1 );
					hasFaceVertexUv = isBitSet( type, 3 );
					hasFaceNormal = isBitSet( type, 4 );
					hasFaceVertexNormal = isBitSet( type, 5 );
					hasFaceColor = isBitSet( type, 6 );
					hasFaceVertexColor = isBitSet( type, 7 );
  
					// console.log("type", type, "bits", isQuad, hasMaterial, hasFaceVertexUv, hasFaceNormal, hasFaceVertexNormal, hasFaceColor, hasFaceVertexColor);
  
					if ( isQuad ) {
  
						faceA = new Face3();
						faceA.a = faces[ offset ];
						faceA.b = faces[ offset + 1 ];
						faceA.c = faces[ offset + 3 ];
  
						faceB = new Face3();
						faceB.a = faces[ offset + 1 ];
						faceB.b = faces[ offset + 2 ];
						faceB.c = faces[ offset + 3 ];
  
						offset += 4;
  
						if ( hasMaterial ) {
  
							materialIndex = faces[ offset ++ ];
							faceA.materialIndex = materialIndex;
							faceB.materialIndex = materialIndex;
  
						}
  
						// to get face <=> uv index correspondence
  
						fi = geometry.faces.length;
  
						if ( hasFaceVertexUv ) {
  
							for ( i = 0; i < nUvLayers; i ++ ) {
  
								uvLayer = json.uvs[ i ];
  
								geometry.faceVertexUvs[ i ][ fi ] = [];
								geometry.faceVertexUvs[ i ][ fi + 1 ] = [];
  
								for ( j = 0; j < 4; j ++ ) {
  
									uvIndex = faces[ offset ++ ];
  
									u = uvLayer[ uvIndex * 2 ];
									v = uvLayer[ uvIndex * 2 + 1 ];
  
									uv = new Vector2( u, v );
  
									if ( j !== 2 ) geometry.faceVertexUvs[ i ][ fi ].push( uv );
									if ( j !== 0 ) geometry.faceVertexUvs[ i ][ fi + 1 ].push( uv );
  
								}
  
							}
  
						}
  
						if ( hasFaceNormal ) {
  
							normalIndex = faces[ offset ++ ] * 3;
  
							faceA.normal.set(
								normals[ normalIndex ++ ],
								normals[ normalIndex ++ ],
								normals[ normalIndex ]
							);
  
							faceB.normal.copy( faceA.normal );
  
						}
  
						if ( hasFaceVertexNormal ) {
  
							for ( i = 0; i < 4; i ++ ) {
  
								normalIndex = faces[ offset ++ ] * 3;
  
								normal = new Vector3(
									normals[ normalIndex ++ ],
									normals[ normalIndex ++ ],
									normals[ normalIndex ]
								);
  
  
								if ( i !== 2 ) faceA.vertexNormals.push( normal );
								if ( i !== 0 ) faceB.vertexNormals.push( normal );
  
							}
  
						}
  
  
						if ( hasFaceColor ) {
  
							colorIndex = faces[ offset ++ ];
							hex = colors[ colorIndex ];
  
							faceA.color.setHex( hex );
							faceB.color.setHex( hex );
  
						}
  
  
						if ( hasFaceVertexColor ) {
  
							for ( i = 0; i < 4; i ++ ) {
  
								colorIndex = faces[ offset ++ ];
								hex = colors[ colorIndex ];
  
								if ( i !== 2 ) faceA.vertexColors.push( new Color( hex ) );
								if ( i !== 0 ) faceB.vertexColors.push( new Color( hex ) );
  
							}
  
						}
  
						geometry.faces.push( faceA );
						geometry.faces.push( faceB );
  
					} else {
  
						face = new Face3();
						face.a = faces[ offset ++ ];
						face.b = faces[ offset ++ ];
						face.c = faces[ offset ++ ];
  
						if ( hasMaterial ) {
  
							materialIndex = faces[ offset ++ ];
							face.materialIndex = materialIndex;
  
						}
  
						// to get face <=> uv index correspondence
  
						fi = geometry.faces.length;
  
						if ( hasFaceVertexUv ) {
  
							for ( i = 0; i < nUvLayers; i ++ ) {
  
								uvLayer = json.uvs[ i ];
  
								geometry.faceVertexUvs[ i ][ fi ] = [];
  
								for ( j = 0; j < 3; j ++ ) {
  
									uvIndex = faces[ offset ++ ];
  
									u = uvLayer[ uvIndex * 2 ];
									v = uvLayer[ uvIndex * 2 + 1 ];
  
									uv = new Vector2( u, v );
  
									geometry.faceVertexUvs[ i ][ fi ].push( uv );
  
								}
  
							}
  
						}
  
						if ( hasFaceNormal ) {
  
							normalIndex = faces[ offset ++ ] * 3;
  
							face.normal.set(
								normals[ normalIndex ++ ],
								normals[ normalIndex ++ ],
								normals[ normalIndex ]
							);
  
						}
  
						if ( hasFaceVertexNormal ) {
  
							for ( i = 0; i < 3; i ++ ) {
  
								normalIndex = faces[ offset ++ ] * 3;
  
								normal = new Vector3(
									normals[ normalIndex ++ ],
									normals[ normalIndex ++ ],
									normals[ normalIndex ]
								);
  
								face.vertexNormals.push( normal );
  
							}
  
						}
  
  
						if ( hasFaceColor ) {
  
							colorIndex = faces[ offset ++ ];
							face.color.setHex( colors[ colorIndex ] );
  
						}
  
  
						if ( hasFaceVertexColor ) {
  
							for ( i = 0; i < 3; i ++ ) {
  
								colorIndex = faces[ offset ++ ];
								face.vertexColors.push( new Color( colors[ colorIndex ] ) );
  
							}
  
						}
  
						geometry.faces.push( face );
  
					}
  
				}
  
			}
  
			function parseSkin( json, geometry ) {
  
				var influencesPerVertex = ( json.influencesPerVertex !== undefined ) ? json.influencesPerVertex : 2;
  
				if ( json.skinWeights ) {
  
					for ( var i = 0, l = json.skinWeights.length; i < l; i += influencesPerVertex ) {
  
						var x = json.skinWeights[ i ];
						var y = ( influencesPerVertex > 1 ) ? json.skinWeights[ i + 1 ] : 0;
						var z = ( influencesPerVertex > 2 ) ? json.skinWeights[ i + 2 ] : 0;
						var w = ( influencesPerVertex > 3 ) ? json.skinWeights[ i + 3 ] : 0;
  
						geometry.skinWeights.push( new Vector4( x, y, z, w ) );
  
					}
  
				}
  
				if ( json.skinIndices ) {
  
					for ( var i = 0, l = json.skinIndices.length; i < l; i += influencesPerVertex ) {
  
						var a = json.skinIndices[ i ];
						var b = ( influencesPerVertex > 1 ) ? json.skinIndices[ i + 1 ] : 0;
						var c = ( influencesPerVertex > 2 ) ? json.skinIndices[ i + 2 ] : 0;
						var d = ( influencesPerVertex > 3 ) ? json.skinIndices[ i + 3 ] : 0;
  
						geometry.skinIndices.push( new Vector4( a, b, c, d ) );
  
					}
  
				}
  
				geometry.bones = json.bones;
  
				if ( geometry.bones && geometry.bones.length > 0 && ( geometry.skinWeights.length !== geometry.skinIndices.length || geometry.skinIndices.length !== geometry.vertices.length ) ) {
  
					console.warn( 'When skinning, number of vertices (' + geometry.vertices.length + '), skinIndices (' +
						geometry.skinIndices.length + '), and skinWeights (' + geometry.skinWeights.length + ') should match.' );
  
				}
  
			}
  
			function parseMorphing( json, geometry ) {
  
				var scale = json.scale;
  
				if ( json.morphTargets !== undefined ) {
  
					for ( var i = 0, l = json.morphTargets.length; i < l; i ++ ) {
  
						geometry.morphTargets[ i ] = {};
						geometry.morphTargets[ i ].name = json.morphTargets[ i ].name;
						geometry.morphTargets[ i ].vertices = [];
  
						var dstVertices = geometry.morphTargets[ i ].vertices;
						var srcVertices = json.morphTargets[ i ].vertices;
  
						for ( var v = 0, vl = srcVertices.length; v < vl; v += 3 ) {
  
							var vertex = new Vector3();
							vertex.x = srcVertices[ v ] * scale;
							vertex.y = srcVertices[ v + 1 ] * scale;
							vertex.z = srcVertices[ v + 2 ] * scale;
  
							dstVertices.push( vertex );
  
						}
  
					}
  
				}
  
				if ( json.morphColors !== undefined && json.morphColors.length > 0 ) {
  
					console.warn( 'THREE.JSONLoader: "morphColors" no longer supported. Using them as face colors.' );
  
					var faces = geometry.faces;
					var morphColors = json.morphColors[ 0 ].colors;
  
					for ( var i = 0, l = faces.length; i < l; i ++ ) {
  
						faces[ i ].color.fromArray( morphColors, i * 3 );
  
					}
  
				}
  
			}
  
			function parseAnimations( json, geometry ) {
  
				var outputAnimations = [];
  
				// parse old style Bone/Hierarchy animations
				var animations = [];
  
				if ( json.animation !== undefined ) {
  
					animations.push( json.animation );
  
				}
  
				if ( json.animations !== undefined ) {
  
					if ( json.animations.length ) {
  
						animations = animations.concat( json.animations );
  
					} else {
  
						animations.push( json.animations );
  
					}
  
				}
  
				for ( var i = 0; i < animations.length; i ++ ) {
  
					var clip = AnimationClip.parseAnimation( animations[ i ], geometry.bones );
					if ( clip ) outputAnimations.push( clip );
  
				}
  
				// parse implicit morph animations
				if ( geometry.morphTargets ) {
  
					// TODO: Figure out what an appropraite FPS is for morph target animations -- defaulting to 10, but really it is completely arbitrary.
					var morphAnimationClips = AnimationClip.CreateClipsFromMorphTargetSequences( geometry.morphTargets, 10 );
					outputAnimations = outputAnimations.concat( morphAnimationClips );
  
				}
  
				if ( outputAnimations.length > 0 ) geometry.animations = outputAnimations;
  
			}
  
			return function parse( json, texturePath ) {
  
				if ( json.data !== undefined ) {
  
					// Geometry 4.0 spec
					json = json.data;
  
				}
  
				if ( json.scale !== undefined ) {
  
					json.scale = 1.0 / json.scale;
  
				} else {
  
					json.scale = 1.0;
  
				}
  
				var geometry = new Geometry();
  
				parseModel( json, geometry );
				parseSkin( json, geometry );
				parseMorphing( json, geometry );
				parseAnimations( json, geometry );
  
				geometry.computeFaceNormals();
				geometry.computeBoundingSphere();
  
				if ( json.materials === undefined || json.materials.length === 0 ) {
  
					return { geometry: geometry };
  
				} else {
  
					var materials = Loader.prototype.initMaterials( json.materials, texturePath, this.crossOrigin );
  
					return { geometry: geometry, materials: materials };
  
				}
  
			};
  
		} )()
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function ObjectLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
		this.texturePath = '';
  
	}
  
	Object.assign( ObjectLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			if ( this.texturePath === '' ) {
  
				this.texturePath = url.substring( 0, url.lastIndexOf( '/' ) + 1 );
  
			}
  
			var scope = this;
  
			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {
  
				var json = null;
  
				try {
  
					json = JSON.parse( text );
  
				} catch ( error ) {
  
					if ( onError !== undefined ) onError( error );
  
					console.error( 'THREE:ObjectLoader: Can\'t parse ' + url + '.', error.message );
  
					return;
  
				}
  
				var metadata = json.metadata;
  
				if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {
  
					console.error( 'THREE.ObjectLoader: Can\'t load ' + url + '. Use THREE.JSONLoader instead.' );
					return;
  
				}
  
				scope.parse( json, onLoad );
  
			}, onProgress, onError );
  
		},
  
		setTexturePath: function ( value ) {
  
			this.texturePath = value;
			return this;
  
		},
  
		setCrossOrigin: function ( value ) {
  
			this.crossOrigin = value;
			return this;
  
		},
  
		parse: function ( json, onLoad ) {
  
			var shapes = this.parseShape( json.shapes );
			var geometries = this.parseGeometries( json.geometries, shapes );
  
			var images = this.parseImages( json.images, function () {
  
				if ( onLoad !== undefined ) onLoad( object );
  
			} );
  
			var textures = this.parseTextures( json.textures, images );
			var materials = this.parseMaterials( json.materials, textures );
  
			var object = this.parseObject( json.object, geometries, materials );
  
			if ( json.animations ) {
  
				object.animations = this.parseAnimations( json.animations );
  
			}
  
			if ( json.images === undefined || json.images.length === 0 ) {
  
				if ( onLoad !== undefined ) onLoad( object );
  
			}
  
			return object;
  
		},
  
		parseShape: function ( json ) {
  
			var shapes = {};
  
			if ( json !== undefined ) {
  
				for ( var i = 0, l = json.length; i < l; i ++ ) {
  
					var shape = new Shape().fromJSON( json[ i ] );
  
					shapes[ shape.uuid ] = shape;
  
				}
  
			}
  
			return shapes;
  
		},
  
		parseGeometries: function ( json, shapes ) {
  
			var geometries = {};
  
			if ( json !== undefined ) {
  
				var geometryLoader = new JSONLoader();
				var bufferGeometryLoader = new BufferGeometryLoader();
  
				for ( var i = 0, l = json.length; i < l; i ++ ) {
  
					var geometry;
					var data = json[ i ];
  
					switch ( data.type ) {
  
						case 'PlaneGeometry':
						case 'PlaneBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.width,
								data.height,
								data.widthSegments,
								data.heightSegments
							);
  
							break;
  
						case 'BoxGeometry':
						case 'BoxBufferGeometry':
						case 'CubeGeometry': // backwards compatible
  
							geometry = new Geometries[ data.type ](
								data.width,
								data.height,
								data.depth,
								data.widthSegments,
								data.heightSegments,
								data.depthSegments
							);
  
							break;
  
						case 'CircleGeometry':
						case 'CircleBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.segments,
								data.thetaStart,
								data.thetaLength
							);
  
							break;
  
						case 'CylinderGeometry':
						case 'CylinderBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radiusTop,
								data.radiusBottom,
								data.height,
								data.radialSegments,
								data.heightSegments,
								data.openEnded,
								data.thetaStart,
								data.thetaLength
							);
  
							break;
  
						case 'ConeGeometry':
						case 'ConeBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.height,
								data.radialSegments,
								data.heightSegments,
								data.openEnded,
								data.thetaStart,
								data.thetaLength
							);
  
							break;
  
						case 'SphereGeometry':
						case 'SphereBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.widthSegments,
								data.heightSegments,
								data.phiStart,
								data.phiLength,
								data.thetaStart,
								data.thetaLength
							);
  
							break;
  
						case 'DodecahedronGeometry':
						case 'DodecahedronBufferGeometry':
						case 'IcosahedronGeometry':
						case 'IcosahedronBufferGeometry':
						case 'OctahedronGeometry':
						case 'OctahedronBufferGeometry':
						case 'TetrahedronGeometry':
						case 'TetrahedronBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.detail
							);
  
							break;
  
						case 'RingGeometry':
						case 'RingBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.innerRadius,
								data.outerRadius,
								data.thetaSegments,
								data.phiSegments,
								data.thetaStart,
								data.thetaLength
							);
  
							break;
  
						case 'TorusGeometry':
						case 'TorusBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.tube,
								data.radialSegments,
								data.tubularSegments,
								data.arc
							);
  
							break;
  
						case 'TorusKnotGeometry':
						case 'TorusKnotBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.radius,
								data.tube,
								data.tubularSegments,
								data.radialSegments,
								data.p,
								data.q
							);
  
							break;
  
						case 'LatheGeometry':
						case 'LatheBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.points,
								data.segments,
								data.phiStart,
								data.phiLength
							);
  
							break;
  
						case 'PolyhedronGeometry':
						case 'PolyhedronBufferGeometry':
  
							geometry = new Geometries[ data.type ](
								data.vertices,
								data.indices,
								data.radius,
								data.details
							);
  
							break;
  
						case 'ShapeGeometry':
						case 'ShapeBufferGeometry':
  
							var geometryShapes = [];
  
							for ( var j = 0, jl = data.shapes.length; j < jl; j ++ ) {
  
								var shape = shapes[ data.shapes[ j ] ];
  
								geometryShapes.push( shape );
  
							}
  
							geometry = new Geometries[ data.type ](
								geometryShapes,
								data.curveSegments
							);
  
							break;
  
  
						case 'ExtrudeGeometry':
						case 'ExtrudeBufferGeometry':
  
							var geometryShapes = [];
  
							for ( var j = 0, jl = data.shapes.length; j < jl; j ++ ) {
  
								var shape = shapes[ data.shapes[ j ] ];
  
								geometryShapes.push( shape );
  
							}
  
							var extrudePath = data.options.extrudePath;
  
							if ( extrudePath !== undefined ) {
  
								data.options.extrudePath = new Curves[ extrudePath.type ]().fromJSON( extrudePath );
  
							}
  
							geometry = new Geometries[ data.type ](
								geometryShapes,
								data.options
							);
  
							break;
  
						case 'BufferGeometry':
  
							geometry = bufferGeometryLoader.parse( data );
  
							break;
  
						case 'Geometry':
  
							geometry = geometryLoader.parse( data, this.texturePath ).geometry;
  
							break;
  
						default:
  
							console.warn( 'THREE.ObjectLoader: Unsupported geometry type "' + data.type + '"' );
  
							continue;
  
					}
  
					geometry.uuid = data.uuid;
  
					if ( data.name !== undefined ) geometry.name = data.name;
					if ( geometry.isBufferGeometry === true && data.userData !== undefined ) geometry.userData = data.userData;
  
					geometries[ data.uuid ] = geometry;
  
				}
  
			}
  
			return geometries;
  
		},
  
		parseMaterials: function ( json, textures ) {
  
			var materials = {};
  
			if ( json !== undefined ) {
  
				var loader = new MaterialLoader();
				loader.setTextures( textures );
  
				for ( var i = 0, l = json.length; i < l; i ++ ) {
  
					var data = json[ i ];
  
					if ( data.type === 'MultiMaterial' ) {
  
						// Deprecated
  
						var array = [];
  
						for ( var j = 0; j < data.materials.length; j ++ ) {
  
							array.push( loader.parse( data.materials[ j ] ) );
  
						}
  
						materials[ data.uuid ] = array;
  
					} else {
  
						materials[ data.uuid ] = loader.parse( data );
  
					}
  
				}
  
			}
  
			return materials;
  
		},
  
		parseAnimations: function ( json ) {
  
			var animations = [];
  
			for ( var i = 0; i < json.length; i ++ ) {
  
				var data = json[ i ];
  
				var clip = AnimationClip.parse( data );
  
				if ( data.uuid !== undefined ) clip.uuid = data.uuid;
  
				animations.push( clip );
  
			}
  
			return animations;
  
		},
  
		parseImages: function ( json, onLoad ) {
  
			var scope = this;
			var images = {};
  
			function loadImage( url ) {
  
				scope.manager.itemStart( url );
  
				return loader.load( url, function () {
  
					scope.manager.itemEnd( url );
  
				}, undefined, function () {
  
					scope.manager.itemEnd( url );
					scope.manager.itemError( url );
  
				} );
  
			}
  
			if ( json !== undefined && json.length > 0 ) {
  
				var manager = new LoadingManager( onLoad );
  
				var loader = new ImageLoader( manager );
				loader.setCrossOrigin( this.crossOrigin );
  
				for ( var i = 0, l = json.length; i < l; i ++ ) {
  
					var image = json[ i ];
					var path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( image.url ) ? image.url : scope.texturePath + image.url;
  
					images[ image.uuid ] = loadImage( path );
  
				}
  
			}
  
			return images;
  
		},
  
		parseTextures: function ( json, images ) {
  
			function parseConstant( value, type ) {
  
				if ( typeof value === 'number' ) return value;
  
				console.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );
  
				return type[ value ];
  
			}
  
			var textures = {};
  
			if ( json !== undefined ) {
  
				for ( var i = 0, l = json.length; i < l; i ++ ) {
  
					var data = json[ i ];
  
					if ( data.image === undefined ) {
  
						console.warn( 'THREE.ObjectLoader: No "image" specified for', data.uuid );
  
					}
  
					if ( images[ data.image ] === undefined ) {
  
						console.warn( 'THREE.ObjectLoader: Undefined image', data.image );
  
					}
  
					var texture = new Texture( images[ data.image ] );
					texture.needsUpdate = true;
  
					texture.uuid = data.uuid;
  
					if ( data.name !== undefined ) texture.name = data.name;
  
					if ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING );
  
					if ( data.offset !== undefined ) texture.offset.fromArray( data.offset );
					if ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );
					if ( data.center !== undefined ) texture.center.fromArray( data.center );
					if ( data.rotation !== undefined ) texture.rotation = data.rotation;
  
					if ( data.wrap !== undefined ) {
  
						texture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );
						texture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );
  
					}
  
					if ( data.format !== undefined ) texture.format = data.format;
  
					if ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER );
					if ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER );
					if ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;
  
					if ( data.flipY !== undefined ) texture.flipY = data.flipY;
  
					textures[ data.uuid ] = texture;
  
				}
  
			}
  
			return textures;
  
		},
  
		parseObject: function ( data, geometries, materials ) {
  
			var object;
  
			function getGeometry( name ) {
  
				if ( geometries[ name ] === undefined ) {
  
					console.warn( 'THREE.ObjectLoader: Undefined geometry', name );
  
				}
  
				return geometries[ name ];
  
			}
  
			function getMaterial( name ) {
  
				if ( name === undefined ) return undefined;
  
				if ( Array.isArray( name ) ) {
  
					var array = [];
  
					for ( var i = 0, l = name.length; i < l; i ++ ) {
  
						var uuid = name[ i ];
  
						if ( materials[ uuid ] === undefined ) {
  
							console.warn( 'THREE.ObjectLoader: Undefined material', uuid );
  
						}
  
						array.push( materials[ uuid ] );
  
					}
  
					return array;
  
				}
  
				if ( materials[ name ] === undefined ) {
  
					console.warn( 'THREE.ObjectLoader: Undefined material', name );
  
				}
  
				return materials[ name ];
  
			}
  
			switch ( data.type ) {
  
				case 'Scene':
  
					object = new Scene();
  
					if ( data.background !== undefined ) {
  
						if ( Number.isInteger( data.background ) ) {
  
							object.background = new Color( data.background );
  
						}
  
					}
  
					if ( data.fog !== undefined ) {
  
						if ( data.fog.type === 'Fog' ) {
  
							object.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );
  
						} else if ( data.fog.type === 'FogExp2' ) {
  
							object.fog = new FogExp2( data.fog.color, data.fog.density );
  
						}
  
					}
  
					break;
  
				case 'PerspectiveCamera':
  
					object = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );
  
					if ( data.focus !== undefined ) object.focus = data.focus;
					if ( data.zoom !== undefined ) object.zoom = data.zoom;
					if ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;
					if ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;
					if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );
  
					break;
  
				case 'OrthographicCamera':
  
					object = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );
  
					if ( data.zoom !== undefined ) object.zoom = data.zoom;
					if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );
  
					break;
  
				case 'AmbientLight':
  
					object = new AmbientLight( data.color, data.intensity );
  
					break;
  
				case 'DirectionalLight':
  
					object = new DirectionalLight( data.color, data.intensity );
  
					break;
  
				case 'PointLight':
  
					object = new PointLight( data.color, data.intensity, data.distance, data.decay );
  
					break;
  
				case 'RectAreaLight':
  
					object = new RectAreaLight( data.color, data.intensity, data.width, data.height );
  
					break;
  
				case 'SpotLight':
  
					object = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );
  
					break;
  
				case 'HemisphereLight':
  
					object = new HemisphereLight( data.color, data.groundColor, data.intensity );
  
					break;
  
				case 'SkinnedMesh':
  
					console.warn( 'THREE.ObjectLoader.parseObject() does not support SkinnedMesh yet.' );
  
				case 'Mesh':
  
					var geometry = getGeometry( data.geometry );
					var material = getMaterial( data.material );
  
					if ( geometry.bones && geometry.bones.length > 0 ) {
  
						object = new SkinnedMesh( geometry, material );
  
					} else {
  
						object = new Mesh( geometry, material );
  
					}
  
					break;
  
				case 'LOD':
  
					object = new LOD();
  
					break;
  
				case 'Line':
  
					object = new Line( getGeometry( data.geometry ), getMaterial( data.material ), data.mode );
  
					break;
  
				case 'LineLoop':
  
					object = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );
  
					break;
  
				case 'LineSegments':
  
					object = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );
  
					break;
  
				case 'PointCloud':
				case 'Points':
  
					object = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );
  
					break;
  
				case 'Sprite':
  
					object = new Sprite( getMaterial( data.material ) );
  
					break;
  
				case 'Group':
  
					object = new Group();
  
					break;
  
				default:
  
					object = new Object3D();
  
			}
  
			object.uuid = data.uuid;
  
			if ( data.name !== undefined ) object.name = data.name;
  
			if ( data.matrix !== undefined ) {
  
				object.matrix.fromArray( data.matrix );
  
				if ( data.matrixAutoUpdate !== undefined ) object.matrixAutoUpdate = data.matrixAutoUpdate;
				if ( object.matrixAutoUpdate ) object.matrix.decompose( object.position, object.quaternion, object.scale );
  
			} else {
  
				if ( data.position !== undefined ) object.position.fromArray( data.position );
				if ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );
				if ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );
				if ( data.scale !== undefined ) object.scale.fromArray( data.scale );
  
			}
  
			if ( data.castShadow !== undefined ) object.castShadow = data.castShadow;
			if ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;
  
			if ( data.shadow ) {
  
				if ( data.shadow.bias !== undefined ) object.shadow.bias = data.shadow.bias;
				if ( data.shadow.radius !== undefined ) object.shadow.radius = data.shadow.radius;
				if ( data.shadow.mapSize !== undefined ) object.shadow.mapSize.fromArray( data.shadow.mapSize );
				if ( data.shadow.camera !== undefined ) object.shadow.camera = this.parseObject( data.shadow.camera );
  
			}
  
			if ( data.visible !== undefined ) object.visible = data.visible;
			if ( data.frustumCulled !== undefined ) object.frustumCulled = data.frustumCulled;
			if ( data.renderOrder !== undefined ) object.renderOrder = data.renderOrder;
			if ( data.userData !== undefined ) object.userData = data.userData;
  
			if ( data.children !== undefined ) {
  
				var children = data.children;
  
				for ( var i = 0; i < children.length; i ++ ) {
  
					object.add( this.parseObject( children[ i ], geometries, materials ) );
  
				}
  
			}
  
			if ( data.type === 'LOD' ) {
  
				var levels = data.levels;
  
				for ( var l = 0; l < levels.length; l ++ ) {
  
					var level = levels[ l ];
					var child = object.getObjectByProperty( 'uuid', level.object );
  
					if ( child !== undefined ) {
  
						object.addLevel( child, level.distance );
  
					}
  
				}
  
			}
  
			return object;
  
		}
  
	} );
  
	var TEXTURE_MAPPING = {
		UVMapping: UVMapping,
		CubeReflectionMapping: CubeReflectionMapping,
		CubeRefractionMapping: CubeRefractionMapping,
		EquirectangularReflectionMapping: EquirectangularReflectionMapping,
		EquirectangularRefractionMapping: EquirectangularRefractionMapping,
		SphericalReflectionMapping: SphericalReflectionMapping,
		CubeUVReflectionMapping: CubeUVReflectionMapping,
		CubeUVRefractionMapping: CubeUVRefractionMapping
	};
  
	var TEXTURE_WRAPPING = {
		RepeatWrapping: RepeatWrapping,
		ClampToEdgeWrapping: ClampToEdgeWrapping,
		MirroredRepeatWrapping: MirroredRepeatWrapping
	};
  
	var TEXTURE_FILTER = {
		NearestFilter: NearestFilter,
		NearestMipMapNearestFilter: NearestMipMapNearestFilter,
		NearestMipMapLinearFilter: NearestMipMapLinearFilter,
		LinearFilter: LinearFilter,
		LinearMipMapNearestFilter: LinearMipMapNearestFilter,
		LinearMipMapLinearFilter: LinearMipMapLinearFilter
	};
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * minimal class for proxing functions to Path. Replaces old "extractSubpaths()"
	 **/
  
	function ShapePath() {
  
		this.type = 'ShapePath';
  
		this.color = new Color();
  
		this.subPaths = [];
		this.currentPath = null;
  
	}
  
	Object.assign( ShapePath.prototype, {
  
		moveTo: function ( x, y ) {
  
			this.currentPath = new Path();
			this.subPaths.push( this.currentPath );
			this.currentPath.moveTo( x, y );
  
		},
  
		lineTo: function ( x, y ) {
  
			this.currentPath.lineTo( x, y );
  
		},
  
		quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {
  
			this.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );
  
		},
  
		bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {
  
			this.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );
  
		},
  
		splineThru: function ( pts ) {
  
			this.currentPath.splineThru( pts );
  
		},
  
		toShapes: function ( isCCW, noHoles ) {
  
			function toShapesNoHoles( inSubpaths ) {
  
				var shapes = [];
  
				for ( var i = 0, l = inSubpaths.length; i < l; i ++ ) {
  
					var tmpPath = inSubpaths[ i ];
  
					var tmpShape = new Shape();
					tmpShape.curves = tmpPath.curves;
  
					shapes.push( tmpShape );
  
				}
  
				return shapes;
  
			}
  
			function isPointInsidePolygon( inPt, inPolygon ) {
  
				var polyLen = inPolygon.length;
  
				// inPt on polygon contour => immediate success    or
				// toggling of inside/outside at every single! intersection point of an edge
				//  with the horizontal line through inPt, left of inPt
				//  not counting lowerY endpoints of edges and whole edges on that line
				var inside = false;
				for ( var p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {
  
					var edgeLowPt = inPolygon[ p ];
					var edgeHighPt = inPolygon[ q ];
  
					var edgeDx = edgeHighPt.x - edgeLowPt.x;
					var edgeDy = edgeHighPt.y - edgeLowPt.y;
  
					if ( Math.abs( edgeDy ) > Number.EPSILON ) {
  
						// not parallel
						if ( edgeDy < 0 ) {
  
							edgeLowPt = inPolygon[ q ]; edgeDx = - edgeDx;
							edgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;
  
						}
						if ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) 		continue;
  
						if ( inPt.y === edgeLowPt.y ) {
  
							if ( inPt.x === edgeLowPt.x )		return	true;		// inPt is on contour ?
							// continue;				// no intersection or edgeLowPt => doesn't count !!!
  
						} else {
  
							var perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );
							if ( perpEdge === 0 )				return	true;		// inPt is on contour ?
							if ( perpEdge < 0 ) 				continue;
							inside = ! inside;		// true intersection left of inPt
  
						}
  
					} else {
  
						// parallel or collinear
						if ( inPt.y !== edgeLowPt.y ) 		continue;			// parallel
						// edge lies on the same horizontal line as inPt
						if ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||
							 ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )		return	true;	// inPt: Point on contour !
						// continue;
  
					}
  
				}
  
				return	inside;
  
			}
  
			var isClockWise = ShapeUtils.isClockWise;
  
			var subPaths = this.subPaths;
			if ( subPaths.length === 0 ) return [];
  
			if ( noHoles === true )	return	toShapesNoHoles( subPaths );
  
  
			var solid, tmpPath, tmpShape, shapes = [];
  
			if ( subPaths.length === 1 ) {
  
				tmpPath = subPaths[ 0 ];
				tmpShape = new Shape();
				tmpShape.curves = tmpPath.curves;
				shapes.push( tmpShape );
				return shapes;
  
			}
  
			var holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );
			holesFirst = isCCW ? ! holesFirst : holesFirst;
  
			// console.log("Holes first", holesFirst);
  
			var betterShapeHoles = [];
			var newShapes = [];
			var newShapeHoles = [];
			var mainIdx = 0;
			var tmpPoints;
  
			newShapes[ mainIdx ] = undefined;
			newShapeHoles[ mainIdx ] = [];
  
			for ( var i = 0, l = subPaths.length; i < l; i ++ ) {
  
				tmpPath = subPaths[ i ];
				tmpPoints = tmpPath.getPoints();
				solid = isClockWise( tmpPoints );
				solid = isCCW ? ! solid : solid;
  
				if ( solid ) {
  
					if ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )	mainIdx ++;
  
					newShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };
					newShapes[ mainIdx ].s.curves = tmpPath.curves;
  
					if ( holesFirst )	mainIdx ++;
					newShapeHoles[ mainIdx ] = [];
  
					//console.log('cw', i);
  
				} else {
  
					newShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );
  
					//console.log('ccw', i);
  
				}
  
			}
  
			// only Holes? -> probably all Shapes with wrong orientation
			if ( ! newShapes[ 0 ] )	return	toShapesNoHoles( subPaths );
  
  
			if ( newShapes.length > 1 ) {
  
				var ambiguous = false;
				var toChange = [];
  
				for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {
  
					betterShapeHoles[ sIdx ] = [];
  
				}
  
				for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {
  
					var sho = newShapeHoles[ sIdx ];
  
					for ( var hIdx = 0; hIdx < sho.length; hIdx ++ ) {
  
						var ho = sho[ hIdx ];
						var hole_unassigned = true;
  
						for ( var s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {
  
							if ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {
  
								if ( sIdx !== s2Idx )	toChange.push( { froms: sIdx, tos: s2Idx, hole: hIdx } );
								if ( hole_unassigned ) {
  
									hole_unassigned = false;
									betterShapeHoles[ s2Idx ].push( ho );
  
								} else {
  
									ambiguous = true;
  
								}
  
							}
  
						}
						if ( hole_unassigned ) {
  
							betterShapeHoles[ sIdx ].push( ho );
  
						}
  
					}
  
				}
				// console.log("ambiguous: ", ambiguous);
				if ( toChange.length > 0 ) {
  
					// console.log("to change: ", toChange);
					if ( ! ambiguous )	newShapeHoles = betterShapeHoles;
  
				}
  
			}
  
			var tmpHoles;
  
			for ( var i = 0, il = newShapes.length; i < il; i ++ ) {
  
				tmpShape = newShapes[ i ].s;
				shapes.push( tmpShape );
				tmpHoles = newShapeHoles[ i ];
  
				for ( var j = 0, jl = tmpHoles.length; j < jl; j ++ ) {
  
					tmpShape.holes.push( tmpHoles[ j ].h );
  
				}
  
			}
  
			//console.log("shape", shapes);
  
			return shapes;
  
		}
  
	} );
  
	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author mrdoob / http://mrdoob.com/
	 */
  
  
	function Font( data ) {
  
		this.type = 'Font';
  
		this.data = data;
  
	}
  
	Object.assign( Font.prototype, {
  
		isFont: true,
  
		generateShapes: function ( text, size, divisions ) {
  
			if ( size === undefined ) size = 100;
			if ( divisions === undefined ) divisions = 4;
  
			var shapes = [];
			var paths = createPaths( text, size, divisions, this.data );
  
			for ( var p = 0, pl = paths.length; p < pl; p ++ ) {
  
				Array.prototype.push.apply( shapes, paths[ p ].toShapes() );
  
			}
  
			return shapes;
  
		}
  
	} );
  
	function createPaths( text, size, divisions, data ) {
  
		var chars = Array.from ? Array.from( text ) : String( text ).split( '' ); // see #13988
		var scale = size / data.resolution;
		var line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;
  
		var paths = [];
  
		var offsetX = 0, offsetY = 0;
  
		for ( var i = 0; i < chars.length; i ++ ) {
  
			var char = chars[ i ];
  
			if ( char === '\n' ) {
  
				offsetX = 0;
				offsetY -= line_height;
  
			} else {
  
				var ret = createPath( char, divisions, scale, offsetX, offsetY, data );
				offsetX += ret.offsetX;
				paths.push( ret.path );
  
			}
  
		}
  
		return paths;
  
	}
  
	function createPath( char, divisions, scale, offsetX, offsetY, data ) {
  
		var glyph = data.glyphs[ char ] || data.glyphs[ '?' ];
  
		if ( ! glyph ) return;
  
		var path = new ShapePath();
  
		var x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;
  
		if ( glyph.o ) {
  
			var outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );
  
			for ( var i = 0, l = outline.length; i < l; ) {
  
				var action = outline[ i ++ ];
  
				switch ( action ) {
  
					case 'm': // moveTo
  
						x = outline[ i ++ ] * scale + offsetX;
						y = outline[ i ++ ] * scale + offsetY;
  
						path.moveTo( x, y );
  
						break;
  
					case 'l': // lineTo
  
						x = outline[ i ++ ] * scale + offsetX;
						y = outline[ i ++ ] * scale + offsetY;
  
						path.lineTo( x, y );
  
						break;
  
					case 'q': // quadraticCurveTo
  
						cpx = outline[ i ++ ] * scale + offsetX;
						cpy = outline[ i ++ ] * scale + offsetY;
						cpx1 = outline[ i ++ ] * scale + offsetX;
						cpy1 = outline[ i ++ ] * scale + offsetY;
  
						path.quadraticCurveTo( cpx1, cpy1, cpx, cpy );
  
						break;
  
					case 'b': // bezierCurveTo
  
						cpx = outline[ i ++ ] * scale + offsetX;
						cpy = outline[ i ++ ] * scale + offsetY;
						cpx1 = outline[ i ++ ] * scale + offsetX;
						cpy1 = outline[ i ++ ] * scale + offsetY;
						cpx2 = outline[ i ++ ] * scale + offsetX;
						cpy2 = outline[ i ++ ] * scale + offsetY;
  
						path.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );
  
						break;
  
				}
  
			}
  
		}
  
		return { offsetX: glyph.ha * scale, path: path };
  
	}
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function FontLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( FontLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var scope = this;
  
			var loader = new FileLoader( this.manager );
			loader.setPath( this.path );
			loader.load( url, function ( text ) {
  
				var json;
  
				try {
  
					json = JSON.parse( text );
  
				} catch ( e ) {
  
					console.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );
					json = JSON.parse( text.substring( 65, text.length - 2 ) );
  
				}
  
				var font = scope.parse( json );
  
				if ( onLoad ) onLoad( font );
  
			}, onProgress, onError );
  
		},
  
		parse: function ( json ) {
  
			return new Font( json );
  
		},
  
		setPath: function ( value ) {
  
			this.path = value;
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	var context;
  
	var AudioContext = {
  
		getContext: function () {
  
			if ( context === undefined ) {
  
				context = new ( window.AudioContext || window.webkitAudioContext )();
  
			}
  
			return context;
  
		},
  
		setContext: function ( value ) {
  
			context = value;
  
		}
  
	};
  
	/**
	 * @author Reece Aaron Lecrivain / http://reecenotes.com/
	 */
  
	function AudioLoader( manager ) {
  
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
	}
  
	Object.assign( AudioLoader.prototype, {
  
		load: function ( url, onLoad, onProgress, onError ) {
  
			var loader = new FileLoader( this.manager );
			loader.setResponseType( 'arraybuffer' );
			loader.load( url, function ( buffer ) {
  
				var context = AudioContext.getContext();
  
				context.decodeAudioData( buffer, function ( audioBuffer ) {
  
					onLoad( audioBuffer );
  
				} );
  
			}, onProgress, onError );
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function StereoCamera() {
  
		this.type = 'StereoCamera';
  
		this.aspect = 1;
  
		this.eyeSep = 0.064;
  
		this.cameraL = new PerspectiveCamera();
		this.cameraL.layers.enable( 1 );
		this.cameraL.matrixAutoUpdate = false;
  
		this.cameraR = new PerspectiveCamera();
		this.cameraR.layers.enable( 2 );
		this.cameraR.matrixAutoUpdate = false;
  
	}
  
	Object.assign( StereoCamera.prototype, {
  
		update: ( function () {
  
			var instance, focus, fov, aspect, near, far, zoom, eyeSep;
  
			var eyeRight = new Matrix4();
			var eyeLeft = new Matrix4();
  
			return function update( camera ) {
  
				var needsUpdate = instance !== this || focus !== camera.focus || fov !== camera.fov ||
													aspect !== camera.aspect * this.aspect || near !== camera.near ||
													far !== camera.far || zoom !== camera.zoom || eyeSep !== this.eyeSep;
  
				if ( needsUpdate ) {
  
					instance = this;
					focus = camera.focus;
					fov = camera.fov;
					aspect = camera.aspect * this.aspect;
					near = camera.near;
					far = camera.far;
					zoom = camera.zoom;
  
					// Off-axis stereoscopic effect based on
					// http://paulbourke.net/stereographics/stereorender/
  
					var projectionMatrix = camera.projectionMatrix.clone();
					eyeSep = this.eyeSep / 2;
					var eyeSepOnProjection = eyeSep * near / focus;
					var ymax = ( near * Math.tan( _Math.DEG2RAD * fov * 0.5 ) ) / zoom;
					var xmin, xmax;
  
					// translate xOffset
  
					eyeLeft.elements[ 12 ] = - eyeSep;
					eyeRight.elements[ 12 ] = eyeSep;
  
					// for left eye
  
					xmin = - ymax * aspect + eyeSepOnProjection;
					xmax = ymax * aspect + eyeSepOnProjection;
  
					projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );
  
					this.cameraL.projectionMatrix.copy( projectionMatrix );
  
					// for right eye
  
					xmin = - ymax * aspect - eyeSepOnProjection;
					xmax = ymax * aspect - eyeSepOnProjection;
  
					projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );
  
					this.cameraR.projectionMatrix.copy( projectionMatrix );
  
				}
  
				this.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( eyeLeft );
				this.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( eyeRight );
  
			};
  
		} )()
  
	} );
  
	/**
	 * Camera for rendering cube maps
	 *	- renders scene into axis-aligned cube
	 *
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function CubeCamera( near, far, cubeResolution ) {
  
		Object3D.call( this );
  
		this.type = 'CubeCamera';
  
		var fov = 90, aspect = 1;
  
		var cameraPX = new PerspectiveCamera( fov, aspect, near, far );
		cameraPX.up.set( 0, - 1, 0 );
		cameraPX.lookAt( new Vector3( 1, 0, 0 ) );
		this.add( cameraPX );
  
		var cameraNX = new PerspectiveCamera( fov, aspect, near, far );
		cameraNX.up.set( 0, - 1, 0 );
		cameraNX.lookAt( new Vector3( - 1, 0, 0 ) );
		this.add( cameraNX );
  
		var cameraPY = new PerspectiveCamera( fov, aspect, near, far );
		cameraPY.up.set( 0, 0, 1 );
		cameraPY.lookAt( new Vector3( 0, 1, 0 ) );
		this.add( cameraPY );
  
		var cameraNY = new PerspectiveCamera( fov, aspect, near, far );
		cameraNY.up.set( 0, 0, - 1 );
		cameraNY.lookAt( new Vector3( 0, - 1, 0 ) );
		this.add( cameraNY );
  
		var cameraPZ = new PerspectiveCamera( fov, aspect, near, far );
		cameraPZ.up.set( 0, - 1, 0 );
		cameraPZ.lookAt( new Vector3( 0, 0, 1 ) );
		this.add( cameraPZ );
  
		var cameraNZ = new PerspectiveCamera( fov, aspect, near, far );
		cameraNZ.up.set( 0, - 1, 0 );
		cameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );
		this.add( cameraNZ );
  
		var options = { format: RGBFormat, magFilter: LinearFilter, minFilter: LinearFilter };
  
		this.renderTarget = new WebGLRenderTargetCube( cubeResolution, cubeResolution, options );
		this.renderTarget.texture.name = "CubeCamera";
  
		this.update = function ( renderer, scene ) {
  
			if ( this.parent === null ) this.updateMatrixWorld();
  
			var renderTarget = this.renderTarget;
			var generateMipmaps = renderTarget.texture.generateMipmaps;
  
			renderTarget.texture.generateMipmaps = false;
  
			renderTarget.activeCubeFace = 0;
			renderer.render( scene, cameraPX, renderTarget );
  
			renderTarget.activeCubeFace = 1;
			renderer.render( scene, cameraNX, renderTarget );
  
			renderTarget.activeCubeFace = 2;
			renderer.render( scene, cameraPY, renderTarget );
  
			renderTarget.activeCubeFace = 3;
			renderer.render( scene, cameraNY, renderTarget );
  
			renderTarget.activeCubeFace = 4;
			renderer.render( scene, cameraPZ, renderTarget );
  
			renderTarget.texture.generateMipmaps = generateMipmaps;
  
			renderTarget.activeCubeFace = 5;
			renderer.render( scene, cameraNZ, renderTarget );
  
			renderer.setRenderTarget( null );
  
		};
  
		this.clear = function ( renderer, color, depth, stencil ) {
  
			var renderTarget = this.renderTarget;
  
			for ( var i = 0; i < 6; i ++ ) {
  
				renderTarget.activeCubeFace = i;
				renderer.setRenderTarget( renderTarget );
  
				renderer.clear( color, depth, stencil );
  
			}
  
			renderer.setRenderTarget( null );
  
		};
  
	}
  
	CubeCamera.prototype = Object.create( Object3D.prototype );
	CubeCamera.prototype.constructor = CubeCamera;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function AudioListener() {
  
		Object3D.call( this );
  
		this.type = 'AudioListener';
  
		this.context = AudioContext.getContext();
  
		this.gain = this.context.createGain();
		this.gain.connect( this.context.destination );
  
		this.filter = null;
  
	}
  
	AudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: AudioListener,
  
		getInput: function () {
  
			return this.gain;
  
		},
  
		removeFilter: function ( ) {
  
			if ( this.filter !== null ) {
  
				this.gain.disconnect( this.filter );
				this.filter.disconnect( this.context.destination );
				this.gain.connect( this.context.destination );
				this.filter = null;
  
			}
  
		},
  
		getFilter: function () {
  
			return this.filter;
  
		},
  
		setFilter: function ( value ) {
  
			if ( this.filter !== null ) {
  
				this.gain.disconnect( this.filter );
				this.filter.disconnect( this.context.destination );
  
			} else {
  
				this.gain.disconnect( this.context.destination );
  
			}
  
			this.filter = value;
			this.gain.connect( this.filter );
			this.filter.connect( this.context.destination );
  
		},
  
		getMasterVolume: function () {
  
			return this.gain.gain.value;
  
		},
  
		setMasterVolume: function ( value ) {
  
			this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
  
		},
  
		updateMatrixWorld: ( function () {
  
			var position = new Vector3();
			var quaternion = new Quaternion();
			var scale = new Vector3();
  
			var orientation = new Vector3();
  
			return function updateMatrixWorld( force ) {
  
				Object3D.prototype.updateMatrixWorld.call( this, force );
  
				var listener = this.context.listener;
				var up = this.up;
  
				this.matrixWorld.decompose( position, quaternion, scale );
  
				orientation.set( 0, 0, - 1 ).applyQuaternion( quaternion );
  
				if ( listener.positionX ) {
  
					listener.positionX.setValueAtTime( position.x, this.context.currentTime );
					listener.positionY.setValueAtTime( position.y, this.context.currentTime );
					listener.positionZ.setValueAtTime( position.z, this.context.currentTime );
					listener.forwardX.setValueAtTime( orientation.x, this.context.currentTime );
					listener.forwardY.setValueAtTime( orientation.y, this.context.currentTime );
					listener.forwardZ.setValueAtTime( orientation.z, this.context.currentTime );
					listener.upX.setValueAtTime( up.x, this.context.currentTime );
					listener.upY.setValueAtTime( up.y, this.context.currentTime );
					listener.upZ.setValueAtTime( up.z, this.context.currentTime );
  
				} else {
  
					listener.setPosition( position.x, position.y, position.z );
					listener.setOrientation( orientation.x, orientation.y, orientation.z, up.x, up.y, up.z );
  
				}
  
			};
  
		} )()
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Reece Aaron Lecrivain / http://reecenotes.com/
	 */
  
	function Audio( listener ) {
  
		Object3D.call( this );
  
		this.type = 'Audio';
  
		this.context = listener.context;
  
		this.gain = this.context.createGain();
		this.gain.connect( listener.getInput() );
  
		this.autoplay = false;
  
		this.buffer = null;
		this.loop = false;
		this.startTime = 0;
		this.offset = 0;
		this.playbackRate = 1;
		this.isPlaying = false;
		this.hasPlaybackControl = true;
		this.sourceType = 'empty';
  
		this.filters = [];
  
	}
  
	Audio.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
		constructor: Audio,
  
		getOutput: function () {
  
			return this.gain;
  
		},
  
		setNodeSource: function ( audioNode ) {
  
			this.hasPlaybackControl = false;
			this.sourceType = 'audioNode';
			this.source = audioNode;
			this.connect();
  
			return this;
  
		},
  
		setMediaElementSource: function ( mediaElement ) {
  
			this.hasPlaybackControl = false;
			this.sourceType = 'mediaNode';
			this.source = this.context.createMediaElementSource( mediaElement );
			this.connect();
  
			return this;
  
		},
  
		setBuffer: function ( audioBuffer ) {
  
			this.buffer = audioBuffer;
			this.sourceType = 'buffer';
  
			if ( this.autoplay ) this.play();
  
			return this;
  
		},
  
		play: function () {
  
			if ( this.isPlaying === true ) {
  
				console.warn( 'THREE.Audio: Audio is already playing.' );
				return;
  
			}
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;
  
			}
  
			var source = this.context.createBufferSource();
  
			source.buffer = this.buffer;
			source.loop = this.loop;
			source.onended = this.onEnded.bind( this );
			source.playbackRate.setValueAtTime( this.playbackRate, this.startTime );
			this.startTime = this.context.currentTime;
			source.start( this.startTime, this.offset );
  
			this.isPlaying = true;
  
			this.source = source;
  
			return this.connect();
  
		},
  
		pause: function () {
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;
  
			}
  
			if ( this.isPlaying === true ) {
  
				this.source.stop();
				this.offset += ( this.context.currentTime - this.startTime ) * this.playbackRate;
				this.isPlaying = false;
  
			}
  
			return this;
  
		},
  
		stop: function () {
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;
  
			}
  
			this.source.stop();
			this.offset = 0;
			this.isPlaying = false;
  
			return this;
  
		},
  
		connect: function () {
  
			if ( this.filters.length > 0 ) {
  
				this.source.connect( this.filters[ 0 ] );
  
				for ( var i = 1, l = this.filters.length; i < l; i ++ ) {
  
					this.filters[ i - 1 ].connect( this.filters[ i ] );
  
				}
  
				this.filters[ this.filters.length - 1 ].connect( this.getOutput() );
  
			} else {
  
				this.source.connect( this.getOutput() );
  
			}
  
			return this;
  
		},
  
		disconnect: function () {
  
			if ( this.filters.length > 0 ) {
  
				this.source.disconnect( this.filters[ 0 ] );
  
				for ( var i = 1, l = this.filters.length; i < l; i ++ ) {
  
					this.filters[ i - 1 ].disconnect( this.filters[ i ] );
  
				}
  
				this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );
  
			} else {
  
				this.source.disconnect( this.getOutput() );
  
			}
  
			return this;
  
		},
  
		getFilters: function () {
  
			return this.filters;
  
		},
  
		setFilters: function ( value ) {
  
			if ( ! value ) value = [];
  
			if ( this.isPlaying === true ) {
  
				this.disconnect();
				this.filters = value;
				this.connect();
  
			} else {
  
				this.filters = value;
  
			}
  
			return this;
  
		},
  
		getFilter: function () {
  
			return this.getFilters()[ 0 ];
  
		},
  
		setFilter: function ( filter ) {
  
			return this.setFilters( filter ? [ filter ] : [] );
  
		},
  
		setPlaybackRate: function ( value ) {
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;
  
			}
  
			this.playbackRate = value;
  
			if ( this.isPlaying === true ) {
  
				this.source.playbackRate.setValueAtTime( this.playbackRate, this.context.currentTime );
  
			}
  
			return this;
  
		},
  
		getPlaybackRate: function () {
  
			return this.playbackRate;
  
		},
  
		onEnded: function () {
  
			this.isPlaying = false;
  
		},
  
		getLoop: function () {
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return false;
  
			}
  
			return this.loop;
  
		},
  
		setLoop: function ( value ) {
  
			if ( this.hasPlaybackControl === false ) {
  
				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;
  
			}
  
			this.loop = value;
  
			if ( this.isPlaying === true ) {
  
				this.source.loop = this.loop;
  
			}
  
			return this;
  
		},
  
		getVolume: function () {
  
			return this.gain.gain.value;
  
		},
  
		setVolume: function ( value ) {
  
			this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function PositionalAudio( listener ) {
  
		Audio.call( this, listener );
  
		this.panner = this.context.createPanner();
		this.panner.connect( this.gain );
  
	}
  
	PositionalAudio.prototype = Object.assign( Object.create( Audio.prototype ), {
  
		constructor: PositionalAudio,
  
		getOutput: function () {
  
			return this.panner;
  
		},
  
		getRefDistance: function () {
  
			return this.panner.refDistance;
  
		},
  
		setRefDistance: function ( value ) {
  
			this.panner.refDistance = value;
  
		},
  
		getRolloffFactor: function () {
  
			return this.panner.rolloffFactor;
  
		},
  
		setRolloffFactor: function ( value ) {
  
			this.panner.rolloffFactor = value;
  
		},
  
		getDistanceModel: function () {
  
			return this.panner.distanceModel;
  
		},
  
		setDistanceModel: function ( value ) {
  
			this.panner.distanceModel = value;
  
		},
  
		getMaxDistance: function () {
  
			return this.panner.maxDistance;
  
		},
  
		setMaxDistance: function ( value ) {
  
			this.panner.maxDistance = value;
  
		},
  
		updateMatrixWorld: ( function () {
  
			var position = new Vector3();
  
			return function updateMatrixWorld( force ) {
  
				Object3D.prototype.updateMatrixWorld.call( this, force );
  
				position.setFromMatrixPosition( this.matrixWorld );
  
				this.panner.setPosition( position.x, position.y, position.z );
  
			};
  
		} )()
  
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function AudioAnalyser( audio, fftSize ) {
  
		this.analyser = audio.context.createAnalyser();
		this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;
  
		this.data = new Uint8Array( this.analyser.frequencyBinCount );
  
		audio.getOutput().connect( this.analyser );
  
	}
  
	Object.assign( AudioAnalyser.prototype, {
  
		getFrequencyData: function () {
  
			this.analyser.getByteFrequencyData( this.data );
  
			return this.data;
  
		},
  
		getAverageFrequency: function () {
  
			var value = 0, data = this.getFrequencyData();
  
			for ( var i = 0; i < data.length; i ++ ) {
  
				value += data[ i ];
  
			}
  
			return value / data.length;
  
		}
  
	} );
  
	/**
	 *
	 * Buffered scene graph property that allows weighted accumulation.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function PropertyMixer( binding, typeName, valueSize ) {
  
		this.binding = binding;
		this.valueSize = valueSize;
  
		var bufferType = Float64Array,
			mixFunction;
  
		switch ( typeName ) {
  
			case 'quaternion':
				mixFunction = this._slerp;
				break;
  
			case 'string':
			case 'bool':
				bufferType = Array;
				mixFunction = this._select;
				break;
  
			default:
				mixFunction = this._lerp;
  
		}
  
		this.buffer = new bufferType( valueSize * 4 );
		// layout: [ incoming | accu0 | accu1 | orig ]
		//
		// interpolators can use .buffer as their .result
		// the data then goes to 'incoming'
		//
		// 'accu0' and 'accu1' are used frame-interleaved for
		// the cumulative result and are compared to detect
		// changes
		//
		// 'orig' stores the original state of the property
  
		this._mixBufferRegion = mixFunction;
  
		this.cumulativeWeight = 0;
  
		this.useCount = 0;
		this.referenceCount = 0;
  
	}
  
	Object.assign( PropertyMixer.prototype, {
  
		// accumulate data in the 'incoming' region into 'accu<i>'
		accumulate: function ( accuIndex, weight ) {
  
			// note: happily accumulating nothing when weight = 0, the caller knows
			// the weight and shouldn't have made the call in the first place
  
			var buffer = this.buffer,
				stride = this.valueSize,
				offset = accuIndex * stride + stride,
  
				currentWeight = this.cumulativeWeight;
  
			if ( currentWeight === 0 ) {
  
				// accuN := incoming * weight
  
				for ( var i = 0; i !== stride; ++ i ) {
  
					buffer[ offset + i ] = buffer[ i ];
  
				}
  
				currentWeight = weight;
  
			} else {
  
				// accuN := accuN + incoming * weight
  
				currentWeight += weight;
				var mix = weight / currentWeight;
				this._mixBufferRegion( buffer, offset, 0, mix, stride );
  
			}
  
			this.cumulativeWeight = currentWeight;
  
		},
  
		// apply the state of 'accu<i>' to the binding when accus differ
		apply: function ( accuIndex ) {
  
			var stride = this.valueSize,
				buffer = this.buffer,
				offset = accuIndex * stride + stride,
  
				weight = this.cumulativeWeight,
  
				binding = this.binding;
  
			this.cumulativeWeight = 0;
  
			if ( weight < 1 ) {
  
				// accuN := accuN + original * ( 1 - cumulativeWeight )
  
				var originalValueOffset = stride * 3;
  
				this._mixBufferRegion(
					buffer, offset, originalValueOffset, 1 - weight, stride );
  
			}
  
			for ( var i = stride, e = stride + stride; i !== e; ++ i ) {
  
				if ( buffer[ i ] !== buffer[ i + stride ] ) {
  
					// value has changed -> update scene graph
  
					binding.setValue( buffer, offset );
					break;
  
				}
  
			}
  
		},
  
		// remember the state of the bound property and copy it to both accus
		saveOriginalState: function () {
  
			var binding = this.binding;
  
			var buffer = this.buffer,
				stride = this.valueSize,
  
				originalValueOffset = stride * 3;
  
			binding.getValue( buffer, originalValueOffset );
  
			// accu[0..1] := orig -- initially detect changes against the original
			for ( var i = stride, e = originalValueOffset; i !== e; ++ i ) {
  
				buffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];
  
			}
  
			this.cumulativeWeight = 0;
  
		},
  
		// apply the state previously taken via 'saveOriginalState' to the binding
		restoreOriginalState: function () {
  
			var originalValueOffset = this.valueSize * 3;
			this.binding.setValue( this.buffer, originalValueOffset );
  
		},
  
  
		// mix functions
  
		_select: function ( buffer, dstOffset, srcOffset, t, stride ) {
  
			if ( t >= 0.5 ) {
  
				for ( var i = 0; i !== stride; ++ i ) {
  
					buffer[ dstOffset + i ] = buffer[ srcOffset + i ];
  
				}
  
			}
  
		},
  
		_slerp: function ( buffer, dstOffset, srcOffset, t ) {
  
			Quaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t );
  
		},
  
		_lerp: function ( buffer, dstOffset, srcOffset, t, stride ) {
  
			var s = 1 - t;
  
			for ( var i = 0; i !== stride; ++ i ) {
  
				var j = dstOffset + i;
  
				buffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;
  
			}
  
		}
  
	} );
  
	/**
	 *
	 * A reference to a real property in the scene graph.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	// Characters [].:/ are reserved for track binding syntax.
	var RESERVED_CHARS_RE = '\\[\\]\\.:\\/';
  
	function Composite( targetGroup, path, optionalParsedPath ) {
  
		var parsedPath = optionalParsedPath || PropertyBinding.parseTrackName( path );
  
		this._targetGroup = targetGroup;
		this._bindings = targetGroup.subscribe_( path, parsedPath );
  
	}
  
	Object.assign( Composite.prototype, {
  
		getValue: function ( array, offset ) {
  
			this.bind(); // bind all binding
  
			var firstValidIndex = this._targetGroup.nCachedObjects_,
				binding = this._bindings[ firstValidIndex ];
  
			// and only call .getValue on the first
			if ( binding !== undefined ) binding.getValue( array, offset );
  
		},
  
		setValue: function ( array, offset ) {
  
			var bindings = this._bindings;
  
			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {
  
				bindings[ i ].setValue( array, offset );
  
			}
  
		},
  
		bind: function () {
  
			var bindings = this._bindings;
  
			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {
  
				bindings[ i ].bind();
  
			}
  
		},
  
		unbind: function () {
  
			var bindings = this._bindings;
  
			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {
  
				bindings[ i ].unbind();
  
			}
  
		}
  
	} );
  
  
	function PropertyBinding( rootNode, path, parsedPath ) {
  
		this.path = path;
		this.parsedPath = parsedPath || PropertyBinding.parseTrackName( path );
  
		this.node = PropertyBinding.findNode( rootNode, this.parsedPath.nodeName ) || rootNode;
  
		this.rootNode = rootNode;
  
	}
  
	Object.assign( PropertyBinding, {
  
		Composite: Composite,
  
		create: function ( root, path, parsedPath ) {
  
			if ( ! ( root && root.isAnimationObjectGroup ) ) {
  
				return new PropertyBinding( root, path, parsedPath );
  
			} else {
  
				return new PropertyBinding.Composite( root, path, parsedPath );
  
			}
  
		},
  
		/**
		 * Replaces spaces with underscores and removes unsupported characters from
		 * node names, to ensure compatibility with parseTrackName().
		 *
		 * @param  {string} name Node name to be sanitized.
		 * @return {string}
		 */
		sanitizeNodeName: ( function () {
  
			var reservedRe = new RegExp( '[' + RESERVED_CHARS_RE + ']', 'g' );
  
			return function sanitizeNodeName( name ) {
  
				return name.replace( /\s/g, '_' ).replace( reservedRe, '' );
  
			};
  
		}() ),
  
		parseTrackName: function () {
  
			// Attempts to allow node names from any language. ES5's `\w` regexp matches
			// only latin characters, and the unicode \p{L} is not yet supported. So
			// instead, we exclude reserved characters and match everything else.
			var wordChar = '[^' + RESERVED_CHARS_RE + ']';
			var wordCharOrDot = '[^' + RESERVED_CHARS_RE.replace( '\\.', '' ) + ']';
  
			// Parent directories, delimited by '/' or ':'. Currently unused, but must
			// be matched to parse the rest of the track name.
			var directoryRe = /((?:WC+[\/:])*)/.source.replace( 'WC', wordChar );
  
			// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.
			var nodeRe = /(WCOD+)?/.source.replace( 'WCOD', wordCharOrDot );
  
			// Object on target node, and accessor. May not contain reserved
			// characters. Accessor may contain any character except closing bracket.
			var objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace( 'WC', wordChar );
  
			// Property and accessor. May not contain reserved characters. Accessor may
			// contain any non-bracket characters.
			var propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace( 'WC', wordChar );
  
			var trackRe = new RegExp( ''
				+ '^'
				+ directoryRe
				+ nodeRe
				+ objectRe
				+ propertyRe
				+ '$'
			);
  
			var supportedObjectNames = [ 'material', 'materials', 'bones' ];
  
			return function parseTrackName( trackName ) {
  
				var matches = trackRe.exec( trackName );
  
				if ( ! matches ) {
  
					throw new Error( 'PropertyBinding: Cannot parse trackName: ' + trackName );
  
				}
  
				var results = {
					// directoryName: matches[ 1 ], // (tschw) currently unused
					nodeName: matches[ 2 ],
					objectName: matches[ 3 ],
					objectIndex: matches[ 4 ],
					propertyName: matches[ 5 ], // required
					propertyIndex: matches[ 6 ]
				};
  
				var lastDot = results.nodeName && results.nodeName.lastIndexOf( '.' );
  
				if ( lastDot !== undefined && lastDot !== - 1 ) {
  
					var objectName = results.nodeName.substring( lastDot + 1 );
  
					// Object names must be checked against a whitelist. Otherwise, there
					// is no way to parse 'foo.bar.baz': 'baz' must be a property, but
					// 'bar' could be the objectName, or part of a nodeName (which can
					// include '.' characters).
					if ( supportedObjectNames.indexOf( objectName ) !== - 1 ) {
  
						results.nodeName = results.nodeName.substring( 0, lastDot );
						results.objectName = objectName;
  
					}
  
				}
  
				if ( results.propertyName === null || results.propertyName.length === 0 ) {
  
					throw new Error( 'PropertyBinding: can not parse propertyName from trackName: ' + trackName );
  
				}
  
				return results;
  
			};
  
		}(),
  
		findNode: function ( root, nodeName ) {
  
			if ( ! nodeName || nodeName === "" || nodeName === "root" || nodeName === "." || nodeName === - 1 || nodeName === root.name || nodeName === root.uuid ) {
  
				return root;
  
			}
  
			// search into skeleton bones.
			if ( root.skeleton ) {
  
				var bone = root.skeleton.getBoneByName( nodeName );
  
				if ( bone !== undefined ) {
  
					return bone;
  
				}
  
			}
  
			// search into node subtree.
			if ( root.children ) {
  
				var searchNodeSubtree = function ( children ) {
  
					for ( var i = 0; i < children.length; i ++ ) {
  
						var childNode = children[ i ];
  
						if ( childNode.name === nodeName || childNode.uuid === nodeName ) {
  
							return childNode;
  
						}
  
						var result = searchNodeSubtree( childNode.children );
  
						if ( result ) return result;
  
					}
  
					return null;
  
				};
  
				var subTreeNode = searchNodeSubtree( root.children );
  
				if ( subTreeNode ) {
  
					return subTreeNode;
  
				}
  
			}
  
			return null;
  
		}
  
	} );
  
	Object.assign( PropertyBinding.prototype, { // prototype, continued
  
		// these are used to "bind" a nonexistent property
		_getValue_unavailable: function () {},
		_setValue_unavailable: function () {},
  
		BindingType: {
			Direct: 0,
			EntireArray: 1,
			ArrayElement: 2,
			HasFromToArray: 3
		},
  
		Versioning: {
			None: 0,
			NeedsUpdate: 1,
			MatrixWorldNeedsUpdate: 2
		},
  
		GetterByBindingType: [
  
			function getValue_direct( buffer, offset ) {
  
				buffer[ offset ] = this.node[ this.propertyName ];
  
			},
  
			function getValue_array( buffer, offset ) {
  
				var source = this.resolvedProperty;
  
				for ( var i = 0, n = source.length; i !== n; ++ i ) {
  
					buffer[ offset ++ ] = source[ i ];
  
				}
  
			},
  
			function getValue_arrayElement( buffer, offset ) {
  
				buffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];
  
			},
  
			function getValue_toArray( buffer, offset ) {
  
				this.resolvedProperty.toArray( buffer, offset );
  
			}
  
		],
  
		SetterByBindingTypeAndVersioning: [
  
			[
				// Direct
  
				function setValue_direct( buffer, offset ) {
  
					this.targetObject[ this.propertyName ] = buffer[ offset ];
  
				},
  
				function setValue_direct_setNeedsUpdate( buffer, offset ) {
  
					this.targetObject[ this.propertyName ] = buffer[ offset ];
					this.targetObject.needsUpdate = true;
  
				},
  
				function setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {
  
					this.targetObject[ this.propertyName ] = buffer[ offset ];
					this.targetObject.matrixWorldNeedsUpdate = true;
  
				}
  
			], [
  
				// EntireArray
  
				function setValue_array( buffer, offset ) {
  
					var dest = this.resolvedProperty;
  
					for ( var i = 0, n = dest.length; i !== n; ++ i ) {
  
						dest[ i ] = buffer[ offset ++ ];
  
					}
  
				},
  
				function setValue_array_setNeedsUpdate( buffer, offset ) {
  
					var dest = this.resolvedProperty;
  
					for ( var i = 0, n = dest.length; i !== n; ++ i ) {
  
						dest[ i ] = buffer[ offset ++ ];
  
					}
  
					this.targetObject.needsUpdate = true;
  
				},
  
				function setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {
  
					var dest = this.resolvedProperty;
  
					for ( var i = 0, n = dest.length; i !== n; ++ i ) {
  
						dest[ i ] = buffer[ offset ++ ];
  
					}
  
					this.targetObject.matrixWorldNeedsUpdate = true;
  
				}
  
			], [
  
				// ArrayElement
  
				function setValue_arrayElement( buffer, offset ) {
  
					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
  
				},
  
				function setValue_arrayElement_setNeedsUpdate( buffer, offset ) {
  
					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
					this.targetObject.needsUpdate = true;
  
				},
  
				function setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {
  
					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
					this.targetObject.matrixWorldNeedsUpdate = true;
  
				}
  
			], [
  
				// HasToFromArray
  
				function setValue_fromArray( buffer, offset ) {
  
					this.resolvedProperty.fromArray( buffer, offset );
  
				},
  
				function setValue_fromArray_setNeedsUpdate( buffer, offset ) {
  
					this.resolvedProperty.fromArray( buffer, offset );
					this.targetObject.needsUpdate = true;
  
				},
  
				function setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {
  
					this.resolvedProperty.fromArray( buffer, offset );
					this.targetObject.matrixWorldNeedsUpdate = true;
  
				}
  
			]
  
		],
  
		getValue: function getValue_unbound( targetArray, offset ) {
  
			this.bind();
			this.getValue( targetArray, offset );
  
			// Note: This class uses a State pattern on a per-method basis:
			// 'bind' sets 'this.getValue' / 'setValue' and shadows the
			// prototype version of these methods with one that represents
			// the bound state. When the property is not found, the methods
			// become no-ops.
  
		},
  
		setValue: function getValue_unbound( sourceArray, offset ) {
  
			this.bind();
			this.setValue( sourceArray, offset );
  
		},
  
		// create getter / setter pair for a property in the scene graph
		bind: function () {
  
			var targetObject = this.node,
				parsedPath = this.parsedPath,
  
				objectName = parsedPath.objectName,
				propertyName = parsedPath.propertyName,
				propertyIndex = parsedPath.propertyIndex;
  
			if ( ! targetObject ) {
  
				targetObject = PropertyBinding.findNode( this.rootNode, parsedPath.nodeName ) || this.rootNode;
  
				this.node = targetObject;
  
			}
  
			// set fail state so we can just 'return' on error
			this.getValue = this._getValue_unavailable;
			this.setValue = this._setValue_unavailable;
  
			// ensure there is a value node
			if ( ! targetObject ) {
  
				console.error( 'THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\'t found.' );
				return;
  
			}
  
			if ( objectName ) {
  
				var objectIndex = parsedPath.objectIndex;
  
				// special cases were we need to reach deeper into the hierarchy to get the face materials....
				switch ( objectName ) {
  
					case 'materials':
  
						if ( ! targetObject.material ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to material as node does not have a material.', this );
							return;
  
						}
  
						if ( ! targetObject.material.materials ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this );
							return;
  
						}
  
						targetObject = targetObject.material.materials;
  
						break;
  
					case 'bones':
  
						if ( ! targetObject.skeleton ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this );
							return;
  
						}
  
						// potential future optimization: skip this if propertyIndex is already an integer
						// and convert the integer string to a true integer.
  
						targetObject = targetObject.skeleton.bones;
  
						// support resolving morphTarget names into indices.
						for ( var i = 0; i < targetObject.length; i ++ ) {
  
							if ( targetObject[ i ].name === objectIndex ) {
  
								objectIndex = i;
								break;
  
							}
  
						}
  
						break;
  
					default:
  
						if ( targetObject[ objectName ] === undefined ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to objectName of node undefined.', this );
							return;
  
						}
  
						targetObject = targetObject[ objectName ];
  
				}
  
  
				if ( objectIndex !== undefined ) {
  
					if ( targetObject[ objectIndex ] === undefined ) {
  
						console.error( 'THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject );
						return;
  
					}
  
					targetObject = targetObject[ objectIndex ];
  
				}
  
			}
  
			// resolve property
			var nodeProperty = targetObject[ propertyName ];
  
			if ( nodeProperty === undefined ) {
  
				var nodeName = parsedPath.nodeName;
  
				console.error( 'THREE.PropertyBinding: Trying to update property for track: ' + nodeName +
					'.' + propertyName + ' but it wasn\'t found.', targetObject );
				return;
  
			}
  
			// determine versioning scheme
			var versioning = this.Versioning.None;
  
			if ( targetObject.needsUpdate !== undefined ) { // material
  
				versioning = this.Versioning.NeedsUpdate;
				this.targetObject = targetObject;
  
			} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform
  
				versioning = this.Versioning.MatrixWorldNeedsUpdate;
				this.targetObject = targetObject;
  
			}
  
			// determine how the property gets bound
			var bindingType = this.BindingType.Direct;
  
			if ( propertyIndex !== undefined ) {
  
				// access a sub element of the property array (only primitives are supported right now)
  
				if ( propertyName === "morphTargetInfluences" ) {
  
					// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.
  
					// support resolving morphTarget names into indices.
					if ( ! targetObject.geometry ) {
  
						console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this );
						return;
  
					}
  
					if ( targetObject.geometry.isBufferGeometry ) {
  
						if ( ! targetObject.geometry.morphAttributes ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this );
							return;
  
						}
  
						for ( var i = 0; i < this.node.geometry.morphAttributes.position.length; i ++ ) {
  
							if ( targetObject.geometry.morphAttributes.position[ i ].name === propertyIndex ) {
  
								propertyIndex = i;
								break;
  
							}
  
						}
  
  
					} else {
  
						if ( ! targetObject.geometry.morphTargets ) {
  
							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphTargets.', this );
							return;
  
						}
  
						for ( var i = 0; i < this.node.geometry.morphTargets.length; i ++ ) {
  
							if ( targetObject.geometry.morphTargets[ i ].name === propertyIndex ) {
  
								propertyIndex = i;
								break;
  
							}
  
						}
  
					}
  
				}
  
				bindingType = this.BindingType.ArrayElement;
  
				this.resolvedProperty = nodeProperty;
				this.propertyIndex = propertyIndex;
  
			} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {
  
				// must use copy for Object3D.Euler/Quaternion
  
				bindingType = this.BindingType.HasFromToArray;
  
				this.resolvedProperty = nodeProperty;
  
			} else if ( Array.isArray( nodeProperty ) ) {
  
				bindingType = this.BindingType.EntireArray;
  
				this.resolvedProperty = nodeProperty;
  
			} else {
  
				this.propertyName = propertyName;
  
			}
  
			// select getter / setter
			this.getValue = this.GetterByBindingType[ bindingType ];
			this.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];
  
		},
  
		unbind: function () {
  
			this.node = null;
  
			// back to the prototype version of getValue / setValue
			// note: avoiding to mutate the shape of 'this' via 'delete'
			this.getValue = this._getValue_unbound;
			this.setValue = this._setValue_unbound;
  
		}
  
	} );
  
	//!\ DECLARE ALIAS AFTER assign prototype !
	Object.assign( PropertyBinding.prototype, {
  
		// initial state of these methods that calls 'bind'
		_getValue_unbound: PropertyBinding.prototype.getValue,
		_setValue_unbound: PropertyBinding.prototype.setValue,
  
	} );
  
	/**
	 *
	 * A group of objects that receives a shared animation state.
	 *
	 * Usage:
	 *
	 * 	-	Add objects you would otherwise pass as 'root' to the
	 * 		constructor or the .clipAction method of AnimationMixer.
	 *
	 * 	-	Instead pass this object as 'root'.
	 *
	 * 	-	You can also add and remove objects later when the mixer
	 * 		is running.
	 *
	 * Note:
	 *
	 *  	Objects of this class appear as one object to the mixer,
	 *  	so cache control of the individual objects must be done
	 *  	on the group.
	 *
	 * Limitation:
	 *
	 * 	- 	The animated properties must be compatible among the
	 * 		all objects in the group.
	 *
	 *  -	A single property can either be controlled through a
	 *  	target group or directly, but not both.
	 *
	 * @author tschw
	 */
  
	function AnimationObjectGroup() {
  
		this.uuid = _Math.generateUUID();
  
		// cached objects followed by the active ones
		this._objects = Array.prototype.slice.call( arguments );
  
		this.nCachedObjects_ = 0;			// threshold
		// note: read by PropertyBinding.Composite
  
		var indices = {};
		this._indicesByUUID = indices;		// for bookkeeping
  
		for ( var i = 0, n = arguments.length; i !== n; ++ i ) {
  
			indices[ arguments[ i ].uuid ] = i;
  
		}
  
		this._paths = [];					// inside: string
		this._parsedPaths = [];				// inside: { we don't care, here }
		this._bindings = []; 				// inside: Array< PropertyBinding >
		this._bindingsIndicesByPath = {}; 	// inside: indices in these arrays
  
		var scope = this;
  
		this.stats = {
  
			objects: {
				get total() {
  
					return scope._objects.length;
  
				},
				get inUse() {
  
					return this.total - scope.nCachedObjects_;
  
				}
			},
			get bindingsPerObject() {
  
				return scope._bindings.length;
  
			}
  
		};
  
	}
  
	Object.assign( AnimationObjectGroup.prototype, {
  
		isAnimationObjectGroup: true,
  
		add: function () {
  
			var objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				paths = this._paths,
				parsedPaths = this._parsedPaths,
				bindings = this._bindings,
				nBindings = bindings.length,
				knownObject = undefined;
  
			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {
  
				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ];
  
				if ( index === undefined ) {
  
					// unknown object -> add it to the ACTIVE region
  
					index = nObjects ++;
					indicesByUUID[ uuid ] = index;
					objects.push( object );
  
					// accounting is done, now do the same for all bindings
  
					for ( var j = 0, m = nBindings; j !== m; ++ j ) {
  
						bindings[ j ].push( new PropertyBinding( object, paths[ j ], parsedPaths[ j ] ) );
  
					}
  
				} else if ( index < nCachedObjects ) {
  
					knownObject = objects[ index ];
  
					// move existing object to the ACTIVE region
  
					var firstActiveIndex = -- nCachedObjects,
						lastCachedObject = objects[ firstActiveIndex ];
  
					indicesByUUID[ lastCachedObject.uuid ] = index;
					objects[ index ] = lastCachedObject;
  
					indicesByUUID[ uuid ] = firstActiveIndex;
					objects[ firstActiveIndex ] = object;
  
					// accounting is done, now do the same for all bindings
  
					for ( var j = 0, m = nBindings; j !== m; ++ j ) {
  
						var bindingsForPath = bindings[ j ],
							lastCached = bindingsForPath[ firstActiveIndex ],
							binding = bindingsForPath[ index ];
  
						bindingsForPath[ index ] = lastCached;
  
						if ( binding === undefined ) {
  
							// since we do not bother to create new bindings
							// for objects that are cached, the binding may
							// or may not exist
  
							binding = new PropertyBinding( object, paths[ j ], parsedPaths[ j ] );
  
						}
  
						bindingsForPath[ firstActiveIndex ] = binding;
  
					}
  
				} else if ( objects[ index ] !== knownObject ) {
  
					console.error( 'THREE.AnimationObjectGroup: Different objects with the same UUID ' +
							'detected. Clean the caches or recreate your infrastructure when reloading scenes.' );
  
				} // else the object is already where we want it to be
  
			} // for arguments
  
			this.nCachedObjects_ = nCachedObjects;
  
		},
  
		remove: function () {
  
			var objects = this._objects,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				bindings = this._bindings,
				nBindings = bindings.length;
  
			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {
  
				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ];
  
				if ( index !== undefined && index >= nCachedObjects ) {
  
					// move existing object into the CACHED region
  
					var lastCachedIndex = nCachedObjects ++,
						firstActiveObject = objects[ lastCachedIndex ];
  
					indicesByUUID[ firstActiveObject.uuid ] = index;
					objects[ index ] = firstActiveObject;
  
					indicesByUUID[ uuid ] = lastCachedIndex;
					objects[ lastCachedIndex ] = object;
  
					// accounting is done, now do the same for all bindings
  
					for ( var j = 0, m = nBindings; j !== m; ++ j ) {
  
						var bindingsForPath = bindings[ j ],
							firstActive = bindingsForPath[ lastCachedIndex ],
							binding = bindingsForPath[ index ];
  
						bindingsForPath[ index ] = firstActive;
						bindingsForPath[ lastCachedIndex ] = binding;
  
					}
  
				}
  
			} // for arguments
  
			this.nCachedObjects_ = nCachedObjects;
  
		},
  
		// remove & forget
		uncache: function () {
  
			var objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				bindings = this._bindings,
				nBindings = bindings.length;
  
			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {
  
				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ];
  
				if ( index !== undefined ) {
  
					delete indicesByUUID[ uuid ];
  
					if ( index < nCachedObjects ) {
  
						// object is cached, shrink the CACHED region
  
						var firstActiveIndex = -- nCachedObjects,
							lastCachedObject = objects[ firstActiveIndex ],
							lastIndex = -- nObjects,
							lastObject = objects[ lastIndex ];
  
						// last cached object takes this object's place
						indicesByUUID[ lastCachedObject.uuid ] = index;
						objects[ index ] = lastCachedObject;
  
						// last object goes to the activated slot and pop
						indicesByUUID[ lastObject.uuid ] = firstActiveIndex;
						objects[ firstActiveIndex ] = lastObject;
						objects.pop();
  
						// accounting is done, now do the same for all bindings
  
						for ( var j = 0, m = nBindings; j !== m; ++ j ) {
  
							var bindingsForPath = bindings[ j ],
								lastCached = bindingsForPath[ firstActiveIndex ],
								last = bindingsForPath[ lastIndex ];
  
							bindingsForPath[ index ] = lastCached;
							bindingsForPath[ firstActiveIndex ] = last;
							bindingsForPath.pop();
  
						}
  
					} else {
  
						// object is active, just swap with the last and pop
  
						var lastIndex = -- nObjects,
							lastObject = objects[ lastIndex ];
  
						indicesByUUID[ lastObject.uuid ] = index;
						objects[ index ] = lastObject;
						objects.pop();
  
						// accounting is done, now do the same for all bindings
  
						for ( var j = 0, m = nBindings; j !== m; ++ j ) {
  
							var bindingsForPath = bindings[ j ];
  
							bindingsForPath[ index ] = bindingsForPath[ lastIndex ];
							bindingsForPath.pop();
  
						}
  
					} // cached or active
  
				} // if object is known
  
			} // for arguments
  
			this.nCachedObjects_ = nCachedObjects;
  
		},
  
		// Internal interface used by befriended PropertyBinding.Composite:
  
		subscribe_: function ( path, parsedPath ) {
  
			// returns an array of bindings for the given path that is changed
			// according to the contained objects in the group
  
			var indicesByPath = this._bindingsIndicesByPath,
				index = indicesByPath[ path ],
				bindings = this._bindings;
  
			if ( index !== undefined ) return bindings[ index ];
  
			var paths = this._paths,
				parsedPaths = this._parsedPaths,
				objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				bindingsForPath = new Array( nObjects );
  
			index = bindings.length;
  
			indicesByPath[ path ] = index;
  
			paths.push( path );
			parsedPaths.push( parsedPath );
			bindings.push( bindingsForPath );
  
			for ( var i = nCachedObjects, n = objects.length; i !== n; ++ i ) {
  
				var object = objects[ i ];
				bindingsForPath[ i ] = new PropertyBinding( object, path, parsedPath );
  
			}
  
			return bindingsForPath;
  
		},
  
		unsubscribe_: function ( path ) {
  
			// tells the group to forget about a property path and no longer
			// update the array previously obtained with 'subscribe_'
  
			var indicesByPath = this._bindingsIndicesByPath,
				index = indicesByPath[ path ];
  
			if ( index !== undefined ) {
  
				var paths = this._paths,
					parsedPaths = this._parsedPaths,
					bindings = this._bindings,
					lastBindingsIndex = bindings.length - 1,
					lastBindings = bindings[ lastBindingsIndex ],
					lastBindingsPath = path[ lastBindingsIndex ];
  
				indicesByPath[ lastBindingsPath ] = index;
  
				bindings[ index ] = lastBindings;
				bindings.pop();
  
				parsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];
				parsedPaths.pop();
  
				paths[ index ] = paths[ lastBindingsIndex ];
				paths.pop();
  
			}
  
		}
  
	} );
  
	/**
	 *
	 * Action provided by AnimationMixer for scheduling clip playback on specific
	 * objects.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 *
	 */
  
	function AnimationAction( mixer, clip, localRoot ) {
  
		this._mixer = mixer;
		this._clip = clip;
		this._localRoot = localRoot || null;
  
		var tracks = clip.tracks,
			nTracks = tracks.length,
			interpolants = new Array( nTracks );
  
		var interpolantSettings = {
			endingStart: ZeroCurvatureEnding,
			endingEnd: ZeroCurvatureEnding
		};
  
		for ( var i = 0; i !== nTracks; ++ i ) {
  
			var interpolant = tracks[ i ].createInterpolant( null );
			interpolants[ i ] = interpolant;
			interpolant.settings = interpolantSettings;
  
		}
  
		this._interpolantSettings = interpolantSettings;
  
		this._interpolants = interpolants;	// bound by the mixer
  
		// inside: PropertyMixer (managed by the mixer)
		this._propertyBindings = new Array( nTracks );
  
		this._cacheIndex = null;			// for the memory manager
		this._byClipCacheIndex = null;		// for the memory manager
  
		this._timeScaleInterpolant = null;
		this._weightInterpolant = null;
  
		this.loop = LoopRepeat;
		this._loopCount = - 1;
  
		// global mixer time when the action is to be started
		// it's set back to 'null' upon start of the action
		this._startTime = null;
  
		// scaled local time of the action
		// gets clamped or wrapped to 0..clip.duration according to loop
		this.time = 0;
  
		this.timeScale = 1;
		this._effectiveTimeScale = 1;
  
		this.weight = 1;
		this._effectiveWeight = 1;
  
		this.repetitions = Infinity; 		// no. of repetitions when looping
  
		this.paused = false;				// true -> zero effective time scale
		this.enabled = true;				// false -> zero effective weight
  
		this.clampWhenFinished 	= false;	// keep feeding the last frame?
  
		this.zeroSlopeAtStart 	= true;		// for smooth interpolation w/o separate
		this.zeroSlopeAtEnd		= true;		// clips for start, loop and end
  
	}
  
	Object.assign( AnimationAction.prototype, {
  
		// State & Scheduling
  
		play: function () {
  
			this._mixer._activateAction( this );
  
			return this;
  
		},
  
		stop: function () {
  
			this._mixer._deactivateAction( this );
  
			return this.reset();
  
		},
  
		reset: function () {
  
			this.paused = false;
			this.enabled = true;
  
			this.time = 0;			// restart clip
			this._loopCount = - 1;	// forget previous loops
			this._startTime = null;	// forget scheduling
  
			return this.stopFading().stopWarping();
  
		},
  
		isRunning: function () {
  
			return this.enabled && ! this.paused && this.timeScale !== 0 &&
					this._startTime === null && this._mixer._isActiveAction( this );
  
		},
  
		// return true when play has been called
		isScheduled: function () {
  
			return this._mixer._isActiveAction( this );
  
		},
  
		startAt: function ( time ) {
  
			this._startTime = time;
  
			return this;
  
		},
  
		setLoop: function ( mode, repetitions ) {
  
			this.loop = mode;
			this.repetitions = repetitions;
  
			return this;
  
		},
  
		// Weight
  
		// set the weight stopping any scheduled fading
		// although .enabled = false yields an effective weight of zero, this
		// method does *not* change .enabled, because it would be confusing
		setEffectiveWeight: function ( weight ) {
  
			this.weight = weight;
  
			// note: same logic as when updated at runtime
			this._effectiveWeight = this.enabled ? weight : 0;
  
			return this.stopFading();
  
		},
  
		// return the weight considering fading and .enabled
		getEffectiveWeight: function () {
  
			return this._effectiveWeight;
  
		},
  
		fadeIn: function ( duration ) {
  
			return this._scheduleFading( duration, 0, 1 );
  
		},
  
		fadeOut: function ( duration ) {
  
			return this._scheduleFading( duration, 1, 0 );
  
		},
  
		crossFadeFrom: function ( fadeOutAction, duration, warp ) {
  
			fadeOutAction.fadeOut( duration );
			this.fadeIn( duration );
  
			if ( warp ) {
  
				var fadeInDuration = this._clip.duration,
					fadeOutDuration = fadeOutAction._clip.duration,
  
					startEndRatio = fadeOutDuration / fadeInDuration,
					endStartRatio = fadeInDuration / fadeOutDuration;
  
				fadeOutAction.warp( 1.0, startEndRatio, duration );
				this.warp( endStartRatio, 1.0, duration );
  
			}
  
			return this;
  
		},
  
		crossFadeTo: function ( fadeInAction, duration, warp ) {
  
			return fadeInAction.crossFadeFrom( this, duration, warp );
  
		},
  
		stopFading: function () {
  
			var weightInterpolant = this._weightInterpolant;
  
			if ( weightInterpolant !== null ) {
  
				this._weightInterpolant = null;
				this._mixer._takeBackControlInterpolant( weightInterpolant );
  
			}
  
			return this;
  
		},
  
		// Time Scale Control
  
		// set the time scale stopping any scheduled warping
		// although .paused = true yields an effective time scale of zero, this
		// method does *not* change .paused, because it would be confusing
		setEffectiveTimeScale: function ( timeScale ) {
  
			this.timeScale = timeScale;
			this._effectiveTimeScale = this.paused ? 0 : timeScale;
  
			return this.stopWarping();
  
		},
  
		// return the time scale considering warping and .paused
		getEffectiveTimeScale: function () {
  
			return this._effectiveTimeScale;
  
		},
  
		setDuration: function ( duration ) {
  
			this.timeScale = this._clip.duration / duration;
  
			return this.stopWarping();
  
		},
  
		syncWith: function ( action ) {
  
			this.time = action.time;
			this.timeScale = action.timeScale;
  
			return this.stopWarping();
  
		},
  
		halt: function ( duration ) {
  
			return this.warp( this._effectiveTimeScale, 0, duration );
  
		},
  
		warp: function ( startTimeScale, endTimeScale, duration ) {
  
			var mixer = this._mixer, now = mixer.time,
				interpolant = this._timeScaleInterpolant,
  
				timeScale = this.timeScale;
  
			if ( interpolant === null ) {
  
				interpolant = mixer._lendControlInterpolant();
				this._timeScaleInterpolant = interpolant;
  
			}
  
			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;
  
			times[ 0 ] = now;
			times[ 1 ] = now + duration;
  
			values[ 0 ] = startTimeScale / timeScale;
			values[ 1 ] = endTimeScale / timeScale;
  
			return this;
  
		},
  
		stopWarping: function () {
  
			var timeScaleInterpolant = this._timeScaleInterpolant;
  
			if ( timeScaleInterpolant !== null ) {
  
				this._timeScaleInterpolant = null;
				this._mixer._takeBackControlInterpolant( timeScaleInterpolant );
  
			}
  
			return this;
  
		},
  
		// Object Accessors
  
		getMixer: function () {
  
			return this._mixer;
  
		},
  
		getClip: function () {
  
			return this._clip;
  
		},
  
		getRoot: function () {
  
			return this._localRoot || this._mixer._root;
  
		},
  
		// Interna
  
		_update: function ( time, deltaTime, timeDirection, accuIndex ) {
  
			// called by the mixer
  
			if ( ! this.enabled ) {
  
				// call ._updateWeight() to update ._effectiveWeight
  
				this._updateWeight( time );
				return;
  
			}
  
			var startTime = this._startTime;
  
			if ( startTime !== null ) {
  
				// check for scheduled start of action
  
				var timeRunning = ( time - startTime ) * timeDirection;
				if ( timeRunning < 0 || timeDirection === 0 ) {
  
					return; // yet to come / don't decide when delta = 0
  
				}
  
				// start
  
				this._startTime = null; // unschedule
				deltaTime = timeDirection * timeRunning;
  
			}
  
			// apply time scale and advance time
  
			deltaTime *= this._updateTimeScale( time );
			var clipTime = this._updateTime( deltaTime );
  
			// note: _updateTime may disable the action resulting in
			// an effective weight of 0
  
			var weight = this._updateWeight( time );
  
			if ( weight > 0 ) {
  
				var interpolants = this._interpolants;
				var propertyMixers = this._propertyBindings;
  
				for ( var j = 0, m = interpolants.length; j !== m; ++ j ) {
  
					interpolants[ j ].evaluate( clipTime );
					propertyMixers[ j ].accumulate( accuIndex, weight );
  
				}
  
			}
  
		},
  
		_updateWeight: function ( time ) {
  
			var weight = 0;
  
			if ( this.enabled ) {
  
				weight = this.weight;
				var interpolant = this._weightInterpolant;
  
				if ( interpolant !== null ) {
  
					var interpolantValue = interpolant.evaluate( time )[ 0 ];
  
					weight *= interpolantValue;
  
					if ( time > interpolant.parameterPositions[ 1 ] ) {
  
						this.stopFading();
  
						if ( interpolantValue === 0 ) {
  
							// faded out, disable
							this.enabled = false;
  
						}
  
					}
  
				}
  
			}
  
			this._effectiveWeight = weight;
			return weight;
  
		},
  
		_updateTimeScale: function ( time ) {
  
			var timeScale = 0;
  
			if ( ! this.paused ) {
  
				timeScale = this.timeScale;
  
				var interpolant = this._timeScaleInterpolant;
  
				if ( interpolant !== null ) {
  
					var interpolantValue = interpolant.evaluate( time )[ 0 ];
  
					timeScale *= interpolantValue;
  
					if ( time > interpolant.parameterPositions[ 1 ] ) {
  
						this.stopWarping();
  
						if ( timeScale === 0 ) {
  
							// motion has halted, pause
							this.paused = true;
  
						} else {
  
							// warp done - apply final time scale
							this.timeScale = timeScale;
  
						}
  
					}
  
				}
  
			}
  
			this._effectiveTimeScale = timeScale;
			return timeScale;
  
		},
  
		_updateTime: function ( deltaTime ) {
  
			var time = this.time + deltaTime;
  
			if ( deltaTime === 0 ) return time;
  
			var duration = this._clip.duration,
  
				loop = this.loop,
				loopCount = this._loopCount;
  
			if ( loop === LoopOnce ) {
  
				if ( loopCount === - 1 ) {
  
					// just started
  
					this._loopCount = 0;
					this._setEndings( true, true, false );
  
				}
  
				handle_stop: {
  
					if ( time >= duration ) {
  
						time = duration;
  
					} else if ( time < 0 ) {
  
						time = 0;
  
					} else break handle_stop;
  
					if ( this.clampWhenFinished ) this.paused = true;
					else this.enabled = false;
  
					this._mixer.dispatchEvent( {
						type: 'finished', action: this,
						direction: deltaTime < 0 ? - 1 : 1
					} );
  
				}
  
			} else { // repetitive Repeat or PingPong
  
				var pingPong = ( loop === LoopPingPong );
  
				if ( loopCount === - 1 ) {
  
					// just started
  
					if ( deltaTime >= 0 ) {
  
						loopCount = 0;
  
						this._setEndings( true, this.repetitions === 0, pingPong );
  
					} else {
  
						// when looping in reverse direction, the initial
						// transition through zero counts as a repetition,
						// so leave loopCount at -1
  
						this._setEndings( this.repetitions === 0, true, pingPong );
  
					}
  
				}
  
				if ( time >= duration || time < 0 ) {
  
					// wrap around
  
					var loopDelta = Math.floor( time / duration ); // signed
					time -= duration * loopDelta;
  
					loopCount += Math.abs( loopDelta );
  
					var pending = this.repetitions - loopCount;
  
					if ( pending <= 0 ) {
  
						// have to stop (switch state, clamp time, fire event)
  
						if ( this.clampWhenFinished ) this.paused = true;
						else this.enabled = false;
  
						time = deltaTime > 0 ? duration : 0;
  
						this._mixer.dispatchEvent( {
							type: 'finished', action: this,
							direction: deltaTime > 0 ? 1 : - 1
						} );
  
					} else {
  
						// keep running
  
						if ( pending === 1 ) {
  
							// entering the last round
  
							var atStart = deltaTime < 0;
							this._setEndings( atStart, ! atStart, pingPong );
  
						} else {
  
							this._setEndings( false, false, pingPong );
  
						}
  
						this._loopCount = loopCount;
  
						this._mixer.dispatchEvent( {
							type: 'loop', action: this, loopDelta: loopDelta
						} );
  
					}
  
				}
  
				if ( pingPong && ( loopCount & 1 ) === 1 ) {
  
					// invert time for the "pong round"
  
					this.time = time;
					return duration - time;
  
				}
  
			}
  
			this.time = time;
			return time;
  
		},
  
		_setEndings: function ( atStart, atEnd, pingPong ) {
  
			var settings = this._interpolantSettings;
  
			if ( pingPong ) {
  
				settings.endingStart 	= ZeroSlopeEnding;
				settings.endingEnd		= ZeroSlopeEnding;
  
			} else {
  
				// assuming for LoopOnce atStart == atEnd == true
  
				if ( atStart ) {
  
					settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;
  
				} else {
  
					settings.endingStart = WrapAroundEnding;
  
				}
  
				if ( atEnd ) {
  
					settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;
  
				} else {
  
					settings.endingEnd 	 = WrapAroundEnding;
  
				}
  
			}
  
		},
  
		_scheduleFading: function ( duration, weightNow, weightThen ) {
  
			var mixer = this._mixer, now = mixer.time,
				interpolant = this._weightInterpolant;
  
			if ( interpolant === null ) {
  
				interpolant = mixer._lendControlInterpolant();
				this._weightInterpolant = interpolant;
  
			}
  
			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;
  
			times[ 0 ] = now; 				values[ 0 ] = weightNow;
			times[ 1 ] = now + duration;	values[ 1 ] = weightThen;
  
			return this;
  
		}
  
	} );
  
	/**
	 *
	 * Player for AnimationClips.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */
  
	function AnimationMixer( root ) {
  
		this._root = root;
		this._initMemoryManager();
		this._accuIndex = 0;
  
		this.time = 0;
  
		this.timeScale = 1.0;
  
	}
  
	AnimationMixer.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
  
		constructor: AnimationMixer,
  
		_bindAction: function ( action, prototypeAction ) {
  
			var root = action._localRoot || this._root,
				tracks = action._clip.tracks,
				nTracks = tracks.length,
				bindings = action._propertyBindings,
				interpolants = action._interpolants,
				rootUuid = root.uuid,
				bindingsByRoot = this._bindingsByRootAndName,
				bindingsByName = bindingsByRoot[ rootUuid ];
  
			if ( bindingsByName === undefined ) {
  
				bindingsByName = {};
				bindingsByRoot[ rootUuid ] = bindingsByName;
  
			}
  
			for ( var i = 0; i !== nTracks; ++ i ) {
  
				var track = tracks[ i ],
					trackName = track.name,
					binding = bindingsByName[ trackName ];
  
				if ( binding !== undefined ) {
  
					bindings[ i ] = binding;
  
				} else {
  
					binding = bindings[ i ];
  
					if ( binding !== undefined ) {
  
						// existing binding, make sure the cache knows
  
						if ( binding._cacheIndex === null ) {
  
							++ binding.referenceCount;
							this._addInactiveBinding( binding, rootUuid, trackName );
  
						}
  
						continue;
  
					}
  
					var path = prototypeAction && prototypeAction.
						_propertyBindings[ i ].binding.parsedPath;
  
					binding = new PropertyMixer(
						PropertyBinding.create( root, trackName, path ),
						track.ValueTypeName, track.getValueSize() );
  
					++ binding.referenceCount;
					this._addInactiveBinding( binding, rootUuid, trackName );
  
					bindings[ i ] = binding;
  
				}
  
				interpolants[ i ].resultBuffer = binding.buffer;
  
			}
  
		},
  
		_activateAction: function ( action ) {
  
			if ( ! this._isActiveAction( action ) ) {
  
				if ( action._cacheIndex === null ) {
  
					// this action has been forgotten by the cache, but the user
					// appears to be still using it -> rebind
  
					var rootUuid = ( action._localRoot || this._root ).uuid,
						clipUuid = action._clip.uuid,
						actionsForClip = this._actionsByClip[ clipUuid ];
  
					this._bindAction( action,
						actionsForClip && actionsForClip.knownActions[ 0 ] );
  
					this._addInactiveAction( action, clipUuid, rootUuid );
  
				}
  
				var bindings = action._propertyBindings;
  
				// increment reference counts / sort out state
				for ( var i = 0, n = bindings.length; i !== n; ++ i ) {
  
					var binding = bindings[ i ];
  
					if ( binding.useCount ++ === 0 ) {
  
						this._lendBinding( binding );
						binding.saveOriginalState();
  
					}
  
				}
  
				this._lendAction( action );
  
			}
  
		},
  
		_deactivateAction: function ( action ) {
  
			if ( this._isActiveAction( action ) ) {
  
				var bindings = action._propertyBindings;
  
				// decrement reference counts / sort out state
				for ( var i = 0, n = bindings.length; i !== n; ++ i ) {
  
					var binding = bindings[ i ];
  
					if ( -- binding.useCount === 0 ) {
  
						binding.restoreOriginalState();
						this._takeBackBinding( binding );
  
					}
  
				}
  
				this._takeBackAction( action );
  
			}
  
		},
  
		// Memory manager
  
		_initMemoryManager: function () {
  
			this._actions = []; // 'nActiveActions' followed by inactive ones
			this._nActiveActions = 0;
  
			this._actionsByClip = {};
			// inside:
			// {
			// 		knownActions: Array< AnimationAction >	- used as prototypes
			// 		actionByRoot: AnimationAction			- lookup
			// }
  
  
			this._bindings = []; // 'nActiveBindings' followed by inactive ones
			this._nActiveBindings = 0;
  
			this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >
  
  
			this._controlInterpolants = []; // same game as above
			this._nActiveControlInterpolants = 0;
  
			var scope = this;
  
			this.stats = {
  
				actions: {
					get total() {
  
						return scope._actions.length;
  
					},
					get inUse() {
  
						return scope._nActiveActions;
  
					}
				},
				bindings: {
					get total() {
  
						return scope._bindings.length;
  
					},
					get inUse() {
  
						return scope._nActiveBindings;
  
					}
				},
				controlInterpolants: {
					get total() {
  
						return scope._controlInterpolants.length;
  
					},
					get inUse() {
  
						return scope._nActiveControlInterpolants;
  
					}
				}
  
			};
  
		},
  
		// Memory management for AnimationAction objects
  
		_isActiveAction: function ( action ) {
  
			var index = action._cacheIndex;
			return index !== null && index < this._nActiveActions;
  
		},
  
		_addInactiveAction: function ( action, clipUuid, rootUuid ) {
  
			var actions = this._actions,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ];
  
			if ( actionsForClip === undefined ) {
  
				actionsForClip = {
  
					knownActions: [ action ],
					actionByRoot: {}
  
				};
  
				action._byClipCacheIndex = 0;
  
				actionsByClip[ clipUuid ] = actionsForClip;
  
			} else {
  
				var knownActions = actionsForClip.knownActions;
  
				action._byClipCacheIndex = knownActions.length;
				knownActions.push( action );
  
			}
  
			action._cacheIndex = actions.length;
			actions.push( action );
  
			actionsForClip.actionByRoot[ rootUuid ] = action;
  
		},
  
		_removeInactiveAction: function ( action ) {
  
			var actions = this._actions,
				lastInactiveAction = actions[ actions.length - 1 ],
				cacheIndex = action._cacheIndex;
  
			lastInactiveAction._cacheIndex = cacheIndex;
			actions[ cacheIndex ] = lastInactiveAction;
			actions.pop();
  
			action._cacheIndex = null;
  
  
			var clipUuid = action._clip.uuid,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ],
				knownActionsForClip = actionsForClip.knownActions,
  
				lastKnownAction =
					knownActionsForClip[ knownActionsForClip.length - 1 ],
  
				byClipCacheIndex = action._byClipCacheIndex;
  
			lastKnownAction._byClipCacheIndex = byClipCacheIndex;
			knownActionsForClip[ byClipCacheIndex ] = lastKnownAction;
			knownActionsForClip.pop();
  
			action._byClipCacheIndex = null;
  
  
			var actionByRoot = actionsForClip.actionByRoot,
				rootUuid = ( action._localRoot || this._root ).uuid;
  
			delete actionByRoot[ rootUuid ];
  
			if ( knownActionsForClip.length === 0 ) {
  
				delete actionsByClip[ clipUuid ];
  
			}
  
			this._removeInactiveBindingsForAction( action );
  
		},
  
		_removeInactiveBindingsForAction: function ( action ) {
  
			var bindings = action._propertyBindings;
			for ( var i = 0, n = bindings.length; i !== n; ++ i ) {
  
				var binding = bindings[ i ];
  
				if ( -- binding.referenceCount === 0 ) {
  
					this._removeInactiveBinding( binding );
  
				}
  
			}
  
		},
  
		_lendAction: function ( action ) {
  
			// [ active actions |  inactive actions  ]
			// [  active actions >| inactive actions ]
			//                 s        a
			//                  <-swap->
			//                 a        s
  
			var actions = this._actions,
				prevIndex = action._cacheIndex,
  
				lastActiveIndex = this._nActiveActions ++,
  
				firstInactiveAction = actions[ lastActiveIndex ];
  
			action._cacheIndex = lastActiveIndex;
			actions[ lastActiveIndex ] = action;
  
			firstInactiveAction._cacheIndex = prevIndex;
			actions[ prevIndex ] = firstInactiveAction;
  
		},
  
		_takeBackAction: function ( action ) {
  
			// [  active actions  | inactive actions ]
			// [ active actions |< inactive actions  ]
			//        a        s
			//         <-swap->
			//        s        a
  
			var actions = this._actions,
				prevIndex = action._cacheIndex,
  
				firstInactiveIndex = -- this._nActiveActions,
  
				lastActiveAction = actions[ firstInactiveIndex ];
  
			action._cacheIndex = firstInactiveIndex;
			actions[ firstInactiveIndex ] = action;
  
			lastActiveAction._cacheIndex = prevIndex;
			actions[ prevIndex ] = lastActiveAction;
  
		},
  
		// Memory management for PropertyMixer objects
  
		_addInactiveBinding: function ( binding, rootUuid, trackName ) {
  
			var bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ],
  
				bindings = this._bindings;
  
			if ( bindingByName === undefined ) {
  
				bindingByName = {};
				bindingsByRoot[ rootUuid ] = bindingByName;
  
			}
  
			bindingByName[ trackName ] = binding;
  
			binding._cacheIndex = bindings.length;
			bindings.push( binding );
  
		},
  
		_removeInactiveBinding: function ( binding ) {
  
			var bindings = this._bindings,
				propBinding = binding.binding,
				rootUuid = propBinding.rootNode.uuid,
				trackName = propBinding.path,
				bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ],
  
				lastInactiveBinding = bindings[ bindings.length - 1 ],
				cacheIndex = binding._cacheIndex;
  
			lastInactiveBinding._cacheIndex = cacheIndex;
			bindings[ cacheIndex ] = lastInactiveBinding;
			bindings.pop();
  
			delete bindingByName[ trackName ];
  
			remove_empty_map: {
  
				for ( var _ in bindingByName ) break remove_empty_map; // eslint-disable-line no-unused-vars
  
				delete bindingsByRoot[ rootUuid ];
  
			}
  
		},
  
		_lendBinding: function ( binding ) {
  
			var bindings = this._bindings,
				prevIndex = binding._cacheIndex,
  
				lastActiveIndex = this._nActiveBindings ++,
  
				firstInactiveBinding = bindings[ lastActiveIndex ];
  
			binding._cacheIndex = lastActiveIndex;
			bindings[ lastActiveIndex ] = binding;
  
			firstInactiveBinding._cacheIndex = prevIndex;
			bindings[ prevIndex ] = firstInactiveBinding;
  
		},
  
		_takeBackBinding: function ( binding ) {
  
			var bindings = this._bindings,
				prevIndex = binding._cacheIndex,
  
				firstInactiveIndex = -- this._nActiveBindings,
  
				lastActiveBinding = bindings[ firstInactiveIndex ];
  
			binding._cacheIndex = firstInactiveIndex;
			bindings[ firstInactiveIndex ] = binding;
  
			lastActiveBinding._cacheIndex = prevIndex;
			bindings[ prevIndex ] = lastActiveBinding;
  
		},
  
  
		// Memory management of Interpolants for weight and time scale
  
		_lendControlInterpolant: function () {
  
			var interpolants = this._controlInterpolants,
				lastActiveIndex = this._nActiveControlInterpolants ++,
				interpolant = interpolants[ lastActiveIndex ];
  
			if ( interpolant === undefined ) {
  
				interpolant = new LinearInterpolant(
					new Float32Array( 2 ), new Float32Array( 2 ),
					1, this._controlInterpolantsResultBuffer );
  
				interpolant.__cacheIndex = lastActiveIndex;
				interpolants[ lastActiveIndex ] = interpolant;
  
			}
  
			return interpolant;
  
		},
  
		_takeBackControlInterpolant: function ( interpolant ) {
  
			var interpolants = this._controlInterpolants,
				prevIndex = interpolant.__cacheIndex,
  
				firstInactiveIndex = -- this._nActiveControlInterpolants,
  
				lastActiveInterpolant = interpolants[ firstInactiveIndex ];
  
			interpolant.__cacheIndex = firstInactiveIndex;
			interpolants[ firstInactiveIndex ] = interpolant;
  
			lastActiveInterpolant.__cacheIndex = prevIndex;
			interpolants[ prevIndex ] = lastActiveInterpolant;
  
		},
  
		_controlInterpolantsResultBuffer: new Float32Array( 1 ),
  
		// return an action for a clip optionally using a custom root target
		// object (this method allocates a lot of dynamic memory in case a
		// previously unknown clip/root combination is specified)
		clipAction: function ( clip, optionalRoot ) {
  
			var root = optionalRoot || this._root,
				rootUuid = root.uuid,
  
				clipObject = typeof clip === 'string' ?
					AnimationClip.findByName( root, clip ) : clip,
  
				clipUuid = clipObject !== null ? clipObject.uuid : clip,
  
				actionsForClip = this._actionsByClip[ clipUuid ],
				prototypeAction = null;
  
			if ( actionsForClip !== undefined ) {
  
				var existingAction =
						actionsForClip.actionByRoot[ rootUuid ];
  
				if ( existingAction !== undefined ) {
  
					return existingAction;
  
				}
  
				// we know the clip, so we don't have to parse all
				// the bindings again but can just copy
				prototypeAction = actionsForClip.knownActions[ 0 ];
  
				// also, take the clip from the prototype action
				if ( clipObject === null )
					clipObject = prototypeAction._clip;
  
			}
  
			// clip must be known when specified via string
			if ( clipObject === null ) return null;
  
			// allocate all resources required to run it
			var newAction = new AnimationAction( this, clipObject, optionalRoot );
  
			this._bindAction( newAction, prototypeAction );
  
			// and make the action known to the memory manager
			this._addInactiveAction( newAction, clipUuid, rootUuid );
  
			return newAction;
  
		},
  
		// get an existing action
		existingAction: function ( clip, optionalRoot ) {
  
			var root = optionalRoot || this._root,
				rootUuid = root.uuid,
  
				clipObject = typeof clip === 'string' ?
					AnimationClip.findByName( root, clip ) : clip,
  
				clipUuid = clipObject ? clipObject.uuid : clip,
  
				actionsForClip = this._actionsByClip[ clipUuid ];
  
			if ( actionsForClip !== undefined ) {
  
				return actionsForClip.actionByRoot[ rootUuid ] || null;
  
			}
  
			return null;
  
		},
  
		// deactivates all previously scheduled actions
		stopAllAction: function () {
  
			var actions = this._actions,
				nActions = this._nActiveActions,
				bindings = this._bindings,
				nBindings = this._nActiveBindings;
  
			this._nActiveActions = 0;
			this._nActiveBindings = 0;
  
			for ( var i = 0; i !== nActions; ++ i ) {
  
				actions[ i ].reset();
  
			}
  
			for ( var i = 0; i !== nBindings; ++ i ) {
  
				bindings[ i ].useCount = 0;
  
			}
  
			return this;
  
		},
  
		// advance the time and update apply the animation
		update: function ( deltaTime ) {
  
			deltaTime *= this.timeScale;
  
			var actions = this._actions,
				nActions = this._nActiveActions,
  
				time = this.time += deltaTime,
				timeDirection = Math.sign( deltaTime ),
  
				accuIndex = this._accuIndex ^= 1;
  
			// run active actions
  
			for ( var i = 0; i !== nActions; ++ i ) {
  
				var action = actions[ i ];
  
				action._update( time, deltaTime, timeDirection, accuIndex );
  
			}
  
			// update scene graph
  
			var bindings = this._bindings,
				nBindings = this._nActiveBindings;
  
			for ( var i = 0; i !== nBindings; ++ i ) {
  
				bindings[ i ].apply( accuIndex );
  
			}
  
			return this;
  
		},
  
		// return this mixer's root target object
		getRoot: function () {
  
			return this._root;
  
		},
  
		// free all resources specific to a particular clip
		uncacheClip: function ( clip ) {
  
			var actions = this._actions,
				clipUuid = clip.uuid,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ];
  
			if ( actionsForClip !== undefined ) {
  
				// note: just calling _removeInactiveAction would mess up the
				// iteration state and also require updating the state we can
				// just throw away
  
				var actionsToRemove = actionsForClip.knownActions;
  
				for ( var i = 0, n = actionsToRemove.length; i !== n; ++ i ) {
  
					var action = actionsToRemove[ i ];
  
					this._deactivateAction( action );
  
					var cacheIndex = action._cacheIndex,
						lastInactiveAction = actions[ actions.length - 1 ];
  
					action._cacheIndex = null;
					action._byClipCacheIndex = null;
  
					lastInactiveAction._cacheIndex = cacheIndex;
					actions[ cacheIndex ] = lastInactiveAction;
					actions.pop();
  
					this._removeInactiveBindingsForAction( action );
  
				}
  
				delete actionsByClip[ clipUuid ];
  
			}
  
		},
  
		// free all resources specific to a particular root target object
		uncacheRoot: function ( root ) {
  
			var rootUuid = root.uuid,
				actionsByClip = this._actionsByClip;
  
			for ( var clipUuid in actionsByClip ) {
  
				var actionByRoot = actionsByClip[ clipUuid ].actionByRoot,
					action = actionByRoot[ rootUuid ];
  
				if ( action !== undefined ) {
  
					this._deactivateAction( action );
					this._removeInactiveAction( action );
  
				}
  
			}
  
			var bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ];
  
			if ( bindingByName !== undefined ) {
  
				for ( var trackName in bindingByName ) {
  
					var binding = bindingByName[ trackName ];
					binding.restoreOriginalState();
					this._removeInactiveBinding( binding );
  
				}
  
			}
  
		},
  
		// remove a targeted clip from the cache
		uncacheAction: function ( clip, optionalRoot ) {
  
			var action = this.existingAction( clip, optionalRoot );
  
			if ( action !== null ) {
  
				this._deactivateAction( action );
				this._removeInactiveAction( action );
  
			}
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function Uniform( value ) {
  
		if ( typeof value === 'string' ) {
  
			console.warn( 'THREE.Uniform: Type parameter is no longer needed.' );
			value = arguments[ 1 ];
  
		}
  
		this.value = value;
  
	}
  
	Uniform.prototype.clone = function () {
  
		return new Uniform( this.value.clone === undefined ? this.value : this.value.clone() );
  
	};
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */
  
	function InstancedBufferGeometry() {
  
		BufferGeometry.call( this );
  
		this.type = 'InstancedBufferGeometry';
		this.maxInstancedCount = undefined;
  
	}
  
	InstancedBufferGeometry.prototype = Object.assign( Object.create( BufferGeometry.prototype ), {
  
		constructor: InstancedBufferGeometry,
  
		isInstancedBufferGeometry: true,
  
		copy: function ( source ) {
  
			BufferGeometry.prototype.copy.call( this, source );
  
			this.maxInstancedCount = source.maxInstancedCount;
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		}
  
	} );
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */
  
	function InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {
  
		this.data = interleavedBuffer;
		this.itemSize = itemSize;
		this.offset = offset;
  
		this.normalized = normalized === true;
  
	}
  
	Object.defineProperties( InterleavedBufferAttribute.prototype, {
  
		count: {
  
			get: function () {
  
				return this.data.count;
  
			}
  
		},
  
		array: {
  
			get: function () {
  
				return this.data.array;
  
			}
  
		}
  
	} );
  
	Object.assign( InterleavedBufferAttribute.prototype, {
  
		isInterleavedBufferAttribute: true,
  
		setX: function ( index, x ) {
  
			this.data.array[ index * this.data.stride + this.offset ] = x;
  
			return this;
  
		},
  
		setY: function ( index, y ) {
  
			this.data.array[ index * this.data.stride + this.offset + 1 ] = y;
  
			return this;
  
		},
  
		setZ: function ( index, z ) {
  
			this.data.array[ index * this.data.stride + this.offset + 2 ] = z;
  
			return this;
  
		},
  
		setW: function ( index, w ) {
  
			this.data.array[ index * this.data.stride + this.offset + 3 ] = w;
  
			return this;
  
		},
  
		getX: function ( index ) {
  
			return this.data.array[ index * this.data.stride + this.offset ];
  
		},
  
		getY: function ( index ) {
  
			return this.data.array[ index * this.data.stride + this.offset + 1 ];
  
		},
  
		getZ: function ( index ) {
  
			return this.data.array[ index * this.data.stride + this.offset + 2 ];
  
		},
  
		getW: function ( index ) {
  
			return this.data.array[ index * this.data.stride + this.offset + 3 ];
  
		},
  
		setXY: function ( index, x, y ) {
  
			index = index * this.data.stride + this.offset;
  
			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;
  
			return this;
  
		},
  
		setXYZ: function ( index, x, y, z ) {
  
			index = index * this.data.stride + this.offset;
  
			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;
			this.data.array[ index + 2 ] = z;
  
			return this;
  
		},
  
		setXYZW: function ( index, x, y, z, w ) {
  
			index = index * this.data.stride + this.offset;
  
			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;
			this.data.array[ index + 2 ] = z;
			this.data.array[ index + 3 ] = w;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */
  
	function InterleavedBuffer( array, stride ) {
  
		this.array = array;
		this.stride = stride;
		this.count = array !== undefined ? array.length / stride : 0;
  
		this.dynamic = false;
		this.updateRange = { offset: 0, count: - 1 };
  
		this.version = 0;
  
	}
  
	Object.defineProperty( InterleavedBuffer.prototype, 'needsUpdate', {
  
		set: function ( value ) {
  
			if ( value === true ) this.version ++;
  
		}
  
	} );
  
	Object.assign( InterleavedBuffer.prototype, {
  
		isInterleavedBuffer: true,
  
		onUploadCallback: function () {},
  
		setArray: function ( array ) {
  
			if ( Array.isArray( array ) ) {
  
				throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );
  
			}
  
			this.count = array !== undefined ? array.length / this.stride : 0;
			this.array = array;
  
			return this;
  
		},
  
		setDynamic: function ( value ) {
  
			this.dynamic = value;
  
			return this;
  
		},
  
		copy: function ( source ) {
  
			this.array = new source.array.constructor( source.array );
			this.count = source.count;
			this.stride = source.stride;
			this.dynamic = source.dynamic;
  
			return this;
  
		},
  
		copyAt: function ( index1, attribute, index2 ) {
  
			index1 *= this.stride;
			index2 *= attribute.stride;
  
			for ( var i = 0, l = this.stride; i < l; i ++ ) {
  
				this.array[ index1 + i ] = attribute.array[ index2 + i ];
  
			}
  
			return this;
  
		},
  
		set: function ( value, offset ) {
  
			if ( offset === undefined ) offset = 0;
  
			this.array.set( value, offset );
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		onUpload: function ( callback ) {
  
			this.onUploadCallback = callback;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */
  
	function InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {
  
		InterleavedBuffer.call( this, array, stride );
  
		this.meshPerAttribute = meshPerAttribute || 1;
  
	}
  
	InstancedInterleavedBuffer.prototype = Object.assign( Object.create( InterleavedBuffer.prototype ), {
  
		constructor: InstancedInterleavedBuffer,
  
		isInstancedInterleavedBuffer: true,
  
		copy: function ( source ) {
  
			InterleavedBuffer.prototype.copy.call( this, source );
  
			this.meshPerAttribute = source.meshPerAttribute;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */
  
	function InstancedBufferAttribute( array, itemSize, meshPerAttribute ) {
  
		BufferAttribute.call( this, array, itemSize );
  
		this.meshPerAttribute = meshPerAttribute || 1;
  
	}
  
	InstancedBufferAttribute.prototype = Object.assign( Object.create( BufferAttribute.prototype ), {
  
		constructor: InstancedBufferAttribute,
  
		isInstancedBufferAttribute: true,
  
		copy: function ( source ) {
  
			BufferAttribute.prototype.copy.call( this, source );
  
			this.meshPerAttribute = source.meshPerAttribute;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author bhouston / http://clara.io/
	 * @author stephomi / http://stephaneginier.com/
	 */
  
	function Raycaster( origin, direction, near, far ) {
  
		this.ray = new Ray( origin, direction );
		// direction is assumed to be normalized (for accurate distance calculations)
  
		this.near = near || 0;
		this.far = far || Infinity;
  
		this.params = {
			Mesh: {},
			Line: {},
			LOD: {},
			Points: { threshold: 1 },
			Sprite: {}
		};
  
		Object.defineProperties( this.params, {
			PointCloud: {
				get: function () {
  
					console.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );
					return this.Points;
  
				}
			}
		} );
  
	}
  
	function ascSort( a, b ) {
  
		return a.distance - b.distance;
  
	}
  
	function intersectObject( object, raycaster, intersects, recursive ) {
  
		if ( object.visible === false ) return;
  
		object.raycast( raycaster, intersects );
  
		if ( recursive === true ) {
  
			var children = object.children;
  
			for ( var i = 0, l = children.length; i < l; i ++ ) {
  
				intersectObject( children[ i ], raycaster, intersects, true );
  
			}
  
		}
  
	}
  
	Object.assign( Raycaster.prototype, {
  
		linePrecision: 1,
  
		set: function ( origin, direction ) {
  
			// direction is assumed to be normalized (for accurate distance calculations)
  
			this.ray.set( origin, direction );
  
		},
  
		setFromCamera: function ( coords, camera ) {
  
			if ( ( camera && camera.isPerspectiveCamera ) ) {
  
				this.ray.origin.setFromMatrixPosition( camera.matrixWorld );
				this.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();
  
			} else if ( ( camera && camera.isOrthographicCamera ) ) {
  
				this.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera
				this.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );
  
			} else {
  
				console.error( 'THREE.Raycaster: Unsupported camera type.' );
  
			}
  
		},
  
		intersectObject: function ( object, recursive, optionalTarget ) {
  
			var intersects = optionalTarget || [];
  
			intersectObject( object, this, intersects, recursive );
  
			intersects.sort( ascSort );
  
			return intersects;
  
		},
  
		intersectObjects: function ( objects, recursive, optionalTarget ) {
  
			var intersects = optionalTarget || [];
  
			if ( Array.isArray( objects ) === false ) {
  
				console.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );
				return intersects;
  
			}
  
			for ( var i = 0, l = objects.length; i < l; i ++ ) {
  
				intersectObject( objects[ i ], this, intersects, recursive );
  
			}
  
			intersects.sort( ascSort );
  
			return intersects;
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function Clock( autoStart ) {
  
		this.autoStart = ( autoStart !== undefined ) ? autoStart : true;
  
		this.startTime = 0;
		this.oldTime = 0;
		this.elapsedTime = 0;
  
		this.running = false;
  
	}
  
	Object.assign( Clock.prototype, {
  
		start: function () {
  
			this.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732
  
			this.oldTime = this.startTime;
			this.elapsedTime = 0;
			this.running = true;
  
		},
  
		stop: function () {
  
			this.getElapsedTime();
			this.running = false;
			this.autoStart = false;
  
		},
  
		getElapsedTime: function () {
  
			this.getDelta();
			return this.elapsedTime;
  
		},
  
		getDelta: function () {
  
			var diff = 0;
  
			if ( this.autoStart && ! this.running ) {
  
				this.start();
				return 0;
  
			}
  
			if ( this.running ) {
  
				var newTime = ( typeof performance === 'undefined' ? Date : performance ).now();
  
				diff = ( newTime - this.oldTime ) / 1000;
				this.oldTime = newTime;
  
				this.elapsedTime += diff;
  
			}
  
			return diff;
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
	 *
	 * The poles (phi) are at the positive and negative y axis.
	 * The equator starts at positive z.
	 */
  
	function Spherical( radius, phi, theta ) {
  
		this.radius = ( radius !== undefined ) ? radius : 1.0;
		this.phi = ( phi !== undefined ) ? phi : 0; // up / down towards top and bottom pole
		this.theta = ( theta !== undefined ) ? theta : 0; // around the equator of the sphere
  
		return this;
  
	}
  
	Object.assign( Spherical.prototype, {
  
		set: function ( radius, phi, theta ) {
  
			this.radius = radius;
			this.phi = phi;
			this.theta = theta;
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( other ) {
  
			this.radius = other.radius;
			this.phi = other.phi;
			this.theta = other.theta;
  
			return this;
  
		},
  
		// restrict phi to be betwee EPS and PI-EPS
		makeSafe: function () {
  
			var EPS = 0.000001;
			this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );
  
			return this;
  
		},
  
		setFromVector3: function ( vec3 ) {
  
			this.radius = vec3.length();
  
			if ( this.radius === 0 ) {
  
				this.theta = 0;
				this.phi = 0;
  
			} else {
  
				this.theta = Math.atan2( vec3.x, vec3.z ); // equator angle around y-up axis
				this.phi = Math.acos( _Math.clamp( vec3.y / this.radius, - 1, 1 ) ); // polar angle
  
			}
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
	 *
	 */
  
	function Cylindrical( radius, theta, y ) {
  
		this.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane
		this.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis
		this.y = ( y !== undefined ) ? y : 0; // height above the x-z plane
  
		return this;
  
	}
  
	Object.assign( Cylindrical.prototype, {
  
		set: function ( radius, theta, y ) {
  
			this.radius = radius;
			this.theta = theta;
			this.y = y;
  
			return this;
  
		},
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( other ) {
  
			this.radius = other.radius;
			this.theta = other.theta;
			this.y = other.y;
  
			return this;
  
		},
  
		setFromVector3: function ( vec3 ) {
  
			this.radius = Math.sqrt( vec3.x * vec3.x + vec3.z * vec3.z );
			this.theta = Math.atan2( vec3.x, vec3.z );
			this.y = vec3.y;
  
			return this;
  
		}
  
	} );
  
	/**
	 * @author bhouston / http://clara.io
	 */
  
	function Box2( min, max ) {
  
		this.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );
		this.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );
  
	}
  
	Object.assign( Box2.prototype, {
  
		set: function ( min, max ) {
  
			this.min.copy( min );
			this.max.copy( max );
  
			return this;
  
		},
  
		setFromPoints: function ( points ) {
  
			this.makeEmpty();
  
			for ( var i = 0, il = points.length; i < il; i ++ ) {
  
				this.expandByPoint( points[ i ] );
  
			}
  
			return this;
  
		},
  
		setFromCenterAndSize: function () {
  
			var v1 = new Vector2();
  
			return function setFromCenterAndSize( center, size ) {
  
				var halfSize = v1.copy( size ).multiplyScalar( 0.5 );
				this.min.copy( center ).sub( halfSize );
				this.max.copy( center ).add( halfSize );
  
				return this;
  
			};
  
		}(),
  
		clone: function () {
  
			return new this.constructor().copy( this );
  
		},
  
		copy: function ( box ) {
  
			this.min.copy( box.min );
			this.max.copy( box.max );
  
			return this;
  
		},
  
		makeEmpty: function () {
  
			this.min.x = this.min.y = + Infinity;
			this.max.x = this.max.y = - Infinity;
  
			return this;
  
		},
  
		isEmpty: function () {
  
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
  
			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );
  
		},
  
		getCenter: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box2: .getCenter() target is now required' );
				target = new Vector2();
  
			}
  
			return this.isEmpty() ? target.set( 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );
  
		},
  
		getSize: function ( target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box2: .getSize() target is now required' );
				target = new Vector2();
  
			}
  
			return this.isEmpty() ? target.set( 0, 0 ) : target.subVectors( this.max, this.min );
  
		},
  
		expandByPoint: function ( point ) {
  
			this.min.min( point );
			this.max.max( point );
  
			return this;
  
		},
  
		expandByVector: function ( vector ) {
  
			this.min.sub( vector );
			this.max.add( vector );
  
			return this;
  
		},
  
		expandByScalar: function ( scalar ) {
  
			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );
  
			return this;
  
		},
  
		containsPoint: function ( point ) {
  
			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ? false : true;
  
		},
  
		containsBox: function ( box ) {
  
			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y;
  
		},
  
		getParameter: function ( point, target ) {
  
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box2: .getParameter() target is now required' );
				target = new Vector2();
  
			}
  
			return target.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y )
			);
  
		},
  
		intersectsBox: function ( box ) {
  
			// using 4 splitting planes to rule out intersections
  
			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ? false : true;
  
		},
  
		clampPoint: function ( point, target ) {
  
			if ( target === undefined ) {
  
				console.warn( 'THREE.Box2: .clampPoint() target is now required' );
				target = new Vector2();
  
			}
  
			return target.copy( point ).clamp( this.min, this.max );
  
		},
  
		distanceToPoint: function () {
  
			var v1 = new Vector2();
  
			return function distanceToPoint( point ) {
  
				var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
				return clampedPoint.sub( point ).length();
  
			};
  
		}(),
  
		intersect: function ( box ) {
  
			this.min.max( box.min );
			this.max.min( box.max );
  
			return this;
  
		},
  
		union: function ( box ) {
  
			this.min.min( box.min );
			this.max.max( box.max );
  
			return this;
  
		},
  
		translate: function ( offset ) {
  
			this.min.add( offset );
			this.max.add( offset );
  
			return this;
  
		},
  
		equals: function ( box ) {
  
			return box.min.equals( this.min ) && box.max.equals( this.max );
  
		}
  
	} );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 */
  
	function ImmediateRenderObject( material ) {
  
		Object3D.call( this );
  
		this.material = material;
		this.render = function ( /* renderCallback */ ) {};
  
	}
  
	ImmediateRenderObject.prototype = Object.create( Object3D.prototype );
	ImmediateRenderObject.prototype.constructor = ImmediateRenderObject;
  
	ImmediateRenderObject.prototype.isImmediateRenderObject = true;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function VertexNormalsHelper( object, size, hex, linewidth ) {
  
		this.object = object;
  
		this.size = ( size !== undefined ) ? size : 1;
  
		var color = ( hex !== undefined ) ? hex : 0xff0000;
  
		var width = ( linewidth !== undefined ) ? linewidth : 1;
  
		//
  
		var nNormals = 0;
  
		var objGeometry = this.object.geometry;
  
		if ( objGeometry && objGeometry.isGeometry ) {
  
			nNormals = objGeometry.faces.length * 3;
  
		} else if ( objGeometry && objGeometry.isBufferGeometry ) {
  
			nNormals = objGeometry.attributes.normal.count;
  
		}
  
		//
  
		var geometry = new BufferGeometry();
  
		var positions = new Float32BufferAttribute( nNormals * 2 * 3, 3 );
  
		geometry.addAttribute( 'position', positions );
  
		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );
  
		//
  
		this.matrixAutoUpdate = false;
  
		this.update();
  
	}
  
	VertexNormalsHelper.prototype = Object.create( LineSegments.prototype );
	VertexNormalsHelper.prototype.constructor = VertexNormalsHelper;
  
	VertexNormalsHelper.prototype.update = ( function () {
  
		var v1 = new Vector3();
		var v2 = new Vector3();
		var normalMatrix = new Matrix3();
  
		return function update() {
  
			var keys = [ 'a', 'b', 'c' ];
  
			this.object.updateMatrixWorld( true );
  
			normalMatrix.getNormalMatrix( this.object.matrixWorld );
  
			var matrixWorld = this.object.matrixWorld;
  
			var position = this.geometry.attributes.position;
  
			//
  
			var objGeometry = this.object.geometry;
  
			if ( objGeometry && objGeometry.isGeometry ) {
  
				var vertices = objGeometry.vertices;
  
				var faces = objGeometry.faces;
  
				var idx = 0;
  
				for ( var i = 0, l = faces.length; i < l; i ++ ) {
  
					var face = faces[ i ];
  
					for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {
  
						var vertex = vertices[ face[ keys[ j ] ] ];
  
						var normal = face.vertexNormals[ j ];
  
						v1.copy( vertex ).applyMatrix4( matrixWorld );
  
						v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );
  
						position.setXYZ( idx, v1.x, v1.y, v1.z );
  
						idx = idx + 1;
  
						position.setXYZ( idx, v2.x, v2.y, v2.z );
  
						idx = idx + 1;
  
					}
  
				}
  
			} else if ( objGeometry && objGeometry.isBufferGeometry ) {
  
				var objPos = objGeometry.attributes.position;
  
				var objNorm = objGeometry.attributes.normal;
  
				var idx = 0;
  
				// for simplicity, ignore index and drawcalls, and render every normal
  
				for ( var j = 0, jl = objPos.count; j < jl; j ++ ) {
  
					v1.set( objPos.getX( j ), objPos.getY( j ), objPos.getZ( j ) ).applyMatrix4( matrixWorld );
  
					v2.set( objNorm.getX( j ), objNorm.getY( j ), objNorm.getZ( j ) );
  
					v2.applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );
  
					position.setXYZ( idx, v1.x, v1.y, v1.z );
  
					idx = idx + 1;
  
					position.setXYZ( idx, v2.x, v2.y, v2.z );
  
					idx = idx + 1;
  
				}
  
			}
  
			position.needsUpdate = true;
  
		};
  
	}() );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function SpotLightHelper( light, color ) {
  
		Object3D.call( this );
  
		this.light = light;
		this.light.updateMatrixWorld();
  
		this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.color = color;
  
		var geometry = new BufferGeometry();
  
		var positions = [
			0, 0, 0, 	0, 0, 1,
			0, 0, 0, 	1, 0, 1,
			0, 0, 0,	- 1, 0, 1,
			0, 0, 0, 	0, 1, 1,
			0, 0, 0, 	0, - 1, 1
		];
  
		for ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {
  
			var p1 = ( i / l ) * Math.PI * 2;
			var p2 = ( j / l ) * Math.PI * 2;
  
			positions.push(
				Math.cos( p1 ), Math.sin( p1 ), 1,
				Math.cos( p2 ), Math.sin( p2 ), 1
			);
  
		}
  
		geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
  
		var material = new LineBasicMaterial( { fog: false } );
  
		this.cone = new LineSegments( geometry, material );
		this.add( this.cone );
  
		this.update();
  
	}
  
	SpotLightHelper.prototype = Object.create( Object3D.prototype );
	SpotLightHelper.prototype.constructor = SpotLightHelper;
  
	SpotLightHelper.prototype.dispose = function () {
  
		this.cone.geometry.dispose();
		this.cone.material.dispose();
  
	};
  
	SpotLightHelper.prototype.update = function () {
  
		var vector = new Vector3();
		var vector2 = new Vector3();
  
		return function update() {
  
			this.light.updateMatrixWorld();
  
			var coneLength = this.light.distance ? this.light.distance : 1000;
			var coneWidth = coneLength * Math.tan( this.light.angle );
  
			this.cone.scale.set( coneWidth, coneWidth, coneLength );
  
			vector.setFromMatrixPosition( this.light.matrixWorld );
			vector2.setFromMatrixPosition( this.light.target.matrixWorld );
  
			this.cone.lookAt( vector2.sub( vector ) );
  
			if ( this.color !== undefined ) {
  
				this.cone.material.color.set( this.color );
  
			} else {
  
				this.cone.material.color.copy( this.light.color );
  
			}
  
		};
  
	}();
  
	/**
	 * @author Sean Griffin / http://twitter.com/sgrif
	 * @author Michael Guerrero / http://realitymeltdown.com
	 * @author mrdoob / http://mrdoob.com/
	 * @author ikerr / http://verold.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function getBoneList( object ) {
  
		var boneList = [];
  
		if ( object && object.isBone ) {
  
			boneList.push( object );
  
		}
  
		for ( var i = 0; i < object.children.length; i ++ ) {
  
			boneList.push.apply( boneList, getBoneList( object.children[ i ] ) );
  
		}
  
		return boneList;
  
	}
  
	function SkeletonHelper( object ) {
  
		var bones = getBoneList( object );
  
		var geometry = new BufferGeometry();
  
		var vertices = [];
		var colors = [];
  
		var color1 = new Color( 0, 0, 1 );
		var color2 = new Color( 0, 1, 0 );
  
		for ( var i = 0; i < bones.length; i ++ ) {
  
			var bone = bones[ i ];
  
			if ( bone.parent && bone.parent.isBone ) {
  
				vertices.push( 0, 0, 0 );
				vertices.push( 0, 0, 0 );
				colors.push( color1.r, color1.g, color1.b );
				colors.push( color2.r, color2.g, color2.b );
  
			}
  
		}
  
		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
  
		var material = new LineBasicMaterial( { vertexColors: VertexColors, depthTest: false, depthWrite: false, transparent: true } );
  
		LineSegments.call( this, geometry, material );
  
		this.root = object;
		this.bones = bones;
  
		this.matrix = object.matrixWorld;
		this.matrixAutoUpdate = false;
  
	}
  
	SkeletonHelper.prototype = Object.create( LineSegments.prototype );
	SkeletonHelper.prototype.constructor = SkeletonHelper;
  
	SkeletonHelper.prototype.updateMatrixWorld = function () {
  
		var vector = new Vector3();
  
		var boneMatrix = new Matrix4();
		var matrixWorldInv = new Matrix4();
  
		return function updateMatrixWorld( force ) {
  
			var bones = this.bones;
  
			var geometry = this.geometry;
			var position = geometry.getAttribute( 'position' );
  
			matrixWorldInv.getInverse( this.root.matrixWorld );
  
			for ( var i = 0, j = 0; i < bones.length; i ++ ) {
  
				var bone = bones[ i ];
  
				if ( bone.parent && bone.parent.isBone ) {
  
					boneMatrix.multiplyMatrices( matrixWorldInv, bone.matrixWorld );
					vector.setFromMatrixPosition( boneMatrix );
					position.setXYZ( j, vector.x, vector.y, vector.z );
  
					boneMatrix.multiplyMatrices( matrixWorldInv, bone.parent.matrixWorld );
					vector.setFromMatrixPosition( boneMatrix );
					position.setXYZ( j + 1, vector.x, vector.y, vector.z );
  
					j += 2;
  
				}
  
			}
  
			geometry.getAttribute( 'position' ).needsUpdate = true;
  
			Object3D.prototype.updateMatrixWorld.call( this, force );
  
		};
  
	}();
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function PointLightHelper( light, sphereSize, color ) {
  
		this.light = light;
		this.light.updateMatrixWorld();
  
		this.color = color;
  
		var geometry = new SphereBufferGeometry( sphereSize, 4, 2 );
		var material = new MeshBasicMaterial( { wireframe: true, fog: false } );
  
		Mesh.call( this, geometry, material );
  
		this.matrix = this.light.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.update();
  
  
		/*
		var distanceGeometry = new THREE.IcosahedronGeometry( 1, 2 );
		var distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );
  
		this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
		this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );
  
		var d = light.distance;
  
		if ( d === 0.0 ) {
  
			this.lightDistance.visible = false;
  
		} else {
  
			this.lightDistance.scale.set( d, d, d );
  
		}
  
		this.add( this.lightDistance );
		*/
  
	}
  
	PointLightHelper.prototype = Object.create( Mesh.prototype );
	PointLightHelper.prototype.constructor = PointLightHelper;
  
	PointLightHelper.prototype.dispose = function () {
  
		this.geometry.dispose();
		this.material.dispose();
  
	};
  
	PointLightHelper.prototype.update = function () {
  
		if ( this.color !== undefined ) {
  
			this.material.color.set( this.color );
  
		} else {
  
			this.material.color.copy( this.light.color );
  
		}
  
		/*
		var d = this.light.distance;
  
		if ( d === 0.0 ) {
  
			this.lightDistance.visible = false;
  
		} else {
  
			this.lightDistance.visible = true;
			this.lightDistance.scale.set( d, d, d );
  
		}
		*/
  
	};
  
	/**
	 * @author abelnation / http://github.com/abelnation
	 * @author Mugen87 / http://github.com/Mugen87
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function RectAreaLightHelper( light, color ) {
  
		Object3D.call( this );
  
		this.light = light;
		this.light.updateMatrixWorld();
  
		this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.color = color;
  
		var material = new LineBasicMaterial( { fog: false } );
  
		var geometry = new BufferGeometry();
  
		geometry.addAttribute( 'position', new BufferAttribute( new Float32Array( 5 * 3 ), 3 ) );
  
		this.line = new Line( geometry, material );
		this.add( this.line );
  
  
		this.update();
  
	}
  
	RectAreaLightHelper.prototype = Object.create( Object3D.prototype );
	RectAreaLightHelper.prototype.constructor = RectAreaLightHelper;
  
	RectAreaLightHelper.prototype.dispose = function () {
  
		this.children[ 0 ].geometry.dispose();
		this.children[ 0 ].material.dispose();
  
	};
  
	RectAreaLightHelper.prototype.update = function () {
  
		// calculate new dimensions of the helper
  
		var hx = this.light.width * 0.5;
		var hy = this.light.height * 0.5;
  
		var position = this.line.geometry.attributes.position;
		var array = position.array;
  
		// update vertices
  
		array[ 0 ] = hx; array[ 1 ] = - hy; array[ 2 ] = 0;
		array[ 3 ] = hx; array[ 4 ] = hy; array[ 5 ] = 0;
		array[ 6 ] = - hx; array[ 7 ] = hy; array[ 8 ] = 0;
		array[ 9 ] = - hx; array[ 10 ] = - hy; array[ 11 ] = 0;
		array[ 12 ] = hx; array[ 13 ] = - hy; array[ 14 ] = 0;
  
		position.needsUpdate = true;
  
		if ( this.color !== undefined ) {
  
			this.line.material.color.set( this.color );
  
		} else {
  
			this.line.material.color.copy( this.light.color );
  
		}
  
	};
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */
  
	function HemisphereLightHelper( light, size, color ) {
  
		Object3D.call( this );
  
		this.light = light;
		this.light.updateMatrixWorld();
  
		this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.color = color;
  
		var geometry = new OctahedronBufferGeometry( size );
		geometry.rotateY( Math.PI * 0.5 );
  
		this.material = new MeshBasicMaterial( { wireframe: true, fog: false } );
		if ( this.color === undefined ) this.material.vertexColors = VertexColors;
  
		var position = geometry.getAttribute( 'position' );
		var colors = new Float32Array( position.count * 3 );
  
		geometry.addAttribute( 'color', new BufferAttribute( colors, 3 ) );
  
		this.add( new Mesh( geometry, this.material ) );
  
		this.update();
  
	}
  
	HemisphereLightHelper.prototype = Object.create( Object3D.prototype );
	HemisphereLightHelper.prototype.constructor = HemisphereLightHelper;
  
	HemisphereLightHelper.prototype.dispose = function () {
  
		this.children[ 0 ].geometry.dispose();
		this.children[ 0 ].material.dispose();
  
	};
  
	HemisphereLightHelper.prototype.update = function () {
  
		var vector = new Vector3();
  
		var color1 = new Color();
		var color2 = new Color();
  
		return function update() {
  
			var mesh = this.children[ 0 ];
  
			if ( this.color !== undefined ) {
  
				this.material.color.set( this.color );
  
			} else {
  
				var colors = mesh.geometry.getAttribute( 'color' );
  
				color1.copy( this.light.color );
				color2.copy( this.light.groundColor );
  
				for ( var i = 0, l = colors.count; i < l; i ++ ) {
  
					var color = ( i < ( l / 2 ) ) ? color1 : color2;
  
					colors.setXYZ( i, color.r, color.g, color.b );
  
				}
  
				colors.needsUpdate = true;
  
			}
  
			mesh.lookAt( vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );
  
		};
  
	}();
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function GridHelper( size, divisions, color1, color2 ) {
  
		size = size || 10;
		divisions = divisions || 10;
		color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
		color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
  
		var center = divisions / 2;
		var step = size / divisions;
		var halfSize = size / 2;
  
		var vertices = [], colors = [];
  
		for ( var i = 0, j = 0, k = - halfSize; i <= divisions; i ++, k += step ) {
  
			vertices.push( - halfSize, 0, k, halfSize, 0, k );
			vertices.push( k, 0, - halfSize, k, 0, halfSize );
  
			var color = i === center ? color1 : color2;
  
			color.toArray( colors, j ); j += 3;
			color.toArray( colors, j ); j += 3;
			color.toArray( colors, j ); j += 3;
			color.toArray( colors, j ); j += 3;
  
		}
  
		var geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
  
		var material = new LineBasicMaterial( { vertexColors: VertexColors } );
  
		LineSegments.call( this, geometry, material );
  
	}
  
	GridHelper.prototype = Object.create( LineSegments.prototype );
	GridHelper.prototype.constructor = GridHelper;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / http://github.com/Mugen87
	 * @author Hectate / http://www.github.com/Hectate
	 */
  
	function PolarGridHelper( radius, radials, circles, divisions, color1, color2 ) {
  
		radius = radius || 10;
		radials = radials || 16;
		circles = circles || 8;
		divisions = divisions || 64;
		color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
		color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
  
		var vertices = [];
		var colors = [];
  
		var x, z;
		var v, i, j, r, color;
  
		// create the radials
  
		for ( i = 0; i <= radials; i ++ ) {
  
			v = ( i / radials ) * ( Math.PI * 2 );
  
			x = Math.sin( v ) * radius;
			z = Math.cos( v ) * radius;
  
			vertices.push( 0, 0, 0 );
			vertices.push( x, 0, z );
  
			color = ( i & 1 ) ? color1 : color2;
  
			colors.push( color.r, color.g, color.b );
			colors.push( color.r, color.g, color.b );
  
		}
  
		// create the circles
  
		for ( i = 0; i <= circles; i ++ ) {
  
			color = ( i & 1 ) ? color1 : color2;
  
			r = radius - ( radius / circles * i );
  
			for ( j = 0; j < divisions; j ++ ) {
  
				// first vertex
  
				v = ( j / divisions ) * ( Math.PI * 2 );
  
				x = Math.sin( v ) * r;
				z = Math.cos( v ) * r;
  
				vertices.push( x, 0, z );
				colors.push( color.r, color.g, color.b );
  
				// second vertex
  
				v = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );
  
				x = Math.sin( v ) * r;
				z = Math.cos( v ) * r;
  
				vertices.push( x, 0, z );
				colors.push( color.r, color.g, color.b );
  
			}
  
		}
  
		var geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
  
		var material = new LineBasicMaterial( { vertexColors: VertexColors } );
  
		LineSegments.call( this, geometry, material );
  
	}
  
	PolarGridHelper.prototype = Object.create( LineSegments.prototype );
	PolarGridHelper.prototype.constructor = PolarGridHelper;
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function FaceNormalsHelper( object, size, hex, linewidth ) {
  
		// FaceNormalsHelper only supports THREE.Geometry
  
		this.object = object;
  
		this.size = ( size !== undefined ) ? size : 1;
  
		var color = ( hex !== undefined ) ? hex : 0xffff00;
  
		var width = ( linewidth !== undefined ) ? linewidth : 1;
  
		//
  
		var nNormals = 0;
  
		var objGeometry = this.object.geometry;
  
		if ( objGeometry && objGeometry.isGeometry ) {
  
			nNormals = objGeometry.faces.length;
  
		} else {
  
			console.warn( 'THREE.FaceNormalsHelper: only THREE.Geometry is supported. Use THREE.VertexNormalsHelper, instead.' );
  
		}
  
		//
  
		var geometry = new BufferGeometry();
  
		var positions = new Float32BufferAttribute( nNormals * 2 * 3, 3 );
  
		geometry.addAttribute( 'position', positions );
  
		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );
  
		//
  
		this.matrixAutoUpdate = false;
		this.update();
  
	}
  
	FaceNormalsHelper.prototype = Object.create( LineSegments.prototype );
	FaceNormalsHelper.prototype.constructor = FaceNormalsHelper;
  
	FaceNormalsHelper.prototype.update = ( function () {
  
		var v1 = new Vector3();
		var v2 = new Vector3();
		var normalMatrix = new Matrix3();
  
		return function update() {
  
			this.object.updateMatrixWorld( true );
  
			normalMatrix.getNormalMatrix( this.object.matrixWorld );
  
			var matrixWorld = this.object.matrixWorld;
  
			var position = this.geometry.attributes.position;
  
			//
  
			var objGeometry = this.object.geometry;
  
			var vertices = objGeometry.vertices;
  
			var faces = objGeometry.faces;
  
			var idx = 0;
  
			for ( var i = 0, l = faces.length; i < l; i ++ ) {
  
				var face = faces[ i ];
  
				var normal = face.normal;
  
				v1.copy( vertices[ face.a ] )
					.add( vertices[ face.b ] )
					.add( vertices[ face.c ] )
					.divideScalar( 3 )
					.applyMatrix4( matrixWorld );
  
				v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );
  
				position.setXYZ( idx, v1.x, v1.y, v1.z );
  
				idx = idx + 1;
  
				position.setXYZ( idx, v2.x, v2.y, v2.z );
  
				idx = idx + 1;
  
			}
  
			position.needsUpdate = true;
  
		};
  
	}() );
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function DirectionalLightHelper( light, size, color ) {
  
		Object3D.call( this );
  
		this.light = light;
		this.light.updateMatrixWorld();
  
		this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.color = color;
  
		if ( size === undefined ) size = 1;
  
		var geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( [
			- size, size, 0,
			size, size, 0,
			size, - size, 0,
			- size, - size, 0,
			- size, size, 0
		], 3 ) );
  
		var material = new LineBasicMaterial( { fog: false } );
  
		this.lightPlane = new Line( geometry, material );
		this.add( this.lightPlane );
  
		geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );
  
		this.targetLine = new Line( geometry, material );
		this.add( this.targetLine );
  
		this.update();
  
	}
  
	DirectionalLightHelper.prototype = Object.create( Object3D.prototype );
	DirectionalLightHelper.prototype.constructor = DirectionalLightHelper;
  
	DirectionalLightHelper.prototype.dispose = function () {
  
		this.lightPlane.geometry.dispose();
		this.lightPlane.material.dispose();
		this.targetLine.geometry.dispose();
		this.targetLine.material.dispose();
  
	};
  
	DirectionalLightHelper.prototype.update = function () {
  
		var v1 = new Vector3();
		var v2 = new Vector3();
		var v3 = new Vector3();
  
		return function update() {
  
			v1.setFromMatrixPosition( this.light.matrixWorld );
			v2.setFromMatrixPosition( this.light.target.matrixWorld );
			v3.subVectors( v2, v1 );
  
			this.lightPlane.lookAt( v3 );
  
			if ( this.color !== undefined ) {
  
				this.lightPlane.material.color.set( this.color );
				this.targetLine.material.color.set( this.color );
  
			} else {
  
				this.lightPlane.material.color.copy( this.light.color );
				this.targetLine.material.color.copy( this.light.color );
  
			}
  
			this.targetLine.lookAt( v3 );
			this.targetLine.scale.z = v3.length();
  
		};
  
	}();
  
	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 *	- shows frustum, line of sight and up of the camera
	 *	- suitable for fast updates
	 * 	- based on frustum visualization in lightgl.js shadowmap example
	 *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
	 */
  
	function CameraHelper( camera ) {
  
		var geometry = new BufferGeometry();
		var material = new LineBasicMaterial( { color: 0xffffff, vertexColors: FaceColors } );
  
		var vertices = [];
		var colors = [];
  
		var pointMap = {};
  
		// colors
  
		var colorFrustum = new Color( 0xffaa00 );
		var colorCone = new Color( 0xff0000 );
		var colorUp = new Color( 0x00aaff );
		var colorTarget = new Color( 0xffffff );
		var colorCross = new Color( 0x333333 );
  
		// near
  
		addLine( 'n1', 'n2', colorFrustum );
		addLine( 'n2', 'n4', colorFrustum );
		addLine( 'n4', 'n3', colorFrustum );
		addLine( 'n3', 'n1', colorFrustum );
  
		// far
  
		addLine( 'f1', 'f2', colorFrustum );
		addLine( 'f2', 'f4', colorFrustum );
		addLine( 'f4', 'f3', colorFrustum );
		addLine( 'f3', 'f1', colorFrustum );
  
		// sides
  
		addLine( 'n1', 'f1', colorFrustum );
		addLine( 'n2', 'f2', colorFrustum );
		addLine( 'n3', 'f3', colorFrustum );
		addLine( 'n4', 'f4', colorFrustum );
  
		// cone
  
		addLine( 'p', 'n1', colorCone );
		addLine( 'p', 'n2', colorCone );
		addLine( 'p', 'n3', colorCone );
		addLine( 'p', 'n4', colorCone );
  
		// up
  
		addLine( 'u1', 'u2', colorUp );
		addLine( 'u2', 'u3', colorUp );
		addLine( 'u3', 'u1', colorUp );
  
		// target
  
		addLine( 'c', 't', colorTarget );
		addLine( 'p', 'c', colorCross );
  
		// cross
  
		addLine( 'cn1', 'cn2', colorCross );
		addLine( 'cn3', 'cn4', colorCross );
  
		addLine( 'cf1', 'cf2', colorCross );
		addLine( 'cf3', 'cf4', colorCross );
  
		function addLine( a, b, color ) {
  
			addPoint( a, color );
			addPoint( b, color );
  
		}
  
		function addPoint( id, color ) {
  
			vertices.push( 0, 0, 0 );
			colors.push( color.r, color.g, color.b );
  
			if ( pointMap[ id ] === undefined ) {
  
				pointMap[ id ] = [];
  
			}
  
			pointMap[ id ].push( ( vertices.length / 3 ) - 1 );
  
		}
  
		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
  
		LineSegments.call( this, geometry, material );
  
		this.camera = camera;
		if ( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();
  
		this.matrix = camera.matrixWorld;
		this.matrixAutoUpdate = false;
  
		this.pointMap = pointMap;
  
		this.update();
  
	}
  
	CameraHelper.prototype = Object.create( LineSegments.prototype );
	CameraHelper.prototype.constructor = CameraHelper;
  
	CameraHelper.prototype.update = function () {
  
		var geometry, pointMap;
  
		var vector = new Vector3();
		var camera = new Camera();
  
		function setPoint( point, x, y, z ) {
  
			vector.set( x, y, z ).unproject( camera );
  
			var points = pointMap[ point ];
  
			if ( points !== undefined ) {
  
				var position = geometry.getAttribute( 'position' );
  
				for ( var i = 0, l = points.length; i < l; i ++ ) {
  
					position.setXYZ( points[ i ], vector.x, vector.y, vector.z );
  
				}
  
			}
  
		}
  
		return function update() {
  
			geometry = this.geometry;
			pointMap = this.pointMap;
  
			var w = 1, h = 1;
  
			// we need just camera projection matrix
			// world matrix must be identity
  
			camera.projectionMatrix.copy( this.camera.projectionMatrix );
  
			// center / target
  
			setPoint( 'c', 0, 0, - 1 );
			setPoint( 't', 0, 0, 1 );
  
			// near
  
			setPoint( 'n1', - w, - h, - 1 );
			setPoint( 'n2', w, - h, - 1 );
			setPoint( 'n3', - w, h, - 1 );
			setPoint( 'n4', w, h, - 1 );
  
			// far
  
			setPoint( 'f1', - w, - h, 1 );
			setPoint( 'f2', w, - h, 1 );
			setPoint( 'f3', - w, h, 1 );
			setPoint( 'f4', w, h, 1 );
  
			// up
  
			setPoint( 'u1', w * 0.7, h * 1.1, - 1 );
			setPoint( 'u2', - w * 0.7, h * 1.1, - 1 );
			setPoint( 'u3', 0, h * 2, - 1 );
  
			// cross
  
			setPoint( 'cf1', - w, 0, 1 );
			setPoint( 'cf2', w, 0, 1 );
			setPoint( 'cf3', 0, - h, 1 );
			setPoint( 'cf4', 0, h, 1 );
  
			setPoint( 'cn1', - w, 0, - 1 );
			setPoint( 'cn2', w, 0, - 1 );
			setPoint( 'cn3', 0, - h, - 1 );
			setPoint( 'cn4', 0, h, - 1 );
  
			geometry.getAttribute( 'position' ).needsUpdate = true;
  
		};
  
	}();
  
	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / http://github.com/Mugen87
	 */
  
	function BoxHelper( object, color ) {
  
		this.object = object;
  
		if ( color === undefined ) color = 0xffff00;
  
		var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
		var positions = new Float32Array( 8 * 3 );
  
		var geometry = new BufferGeometry();
		geometry.setIndex( new BufferAttribute( indices, 1 ) );
		geometry.addAttribute( 'position', new BufferAttribute( positions, 3 ) );
  
		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );
  
		this.matrixAutoUpdate = false;
  
		this.update();
  
	}
  
	BoxHelper.prototype = Object.create( LineSegments.prototype );
	BoxHelper.prototype.constructor = BoxHelper;
  
	BoxHelper.prototype.update = ( function () {
  
		var box = new Box3();
  
		return function update( object ) {
  
			if ( object !== undefined ) {
  
				console.warn( 'THREE.BoxHelper: .update() has no longer arguments.' );
  
			}
  
			if ( this.object !== undefined ) {
  
				box.setFromObject( this.object );
  
			}
  
			if ( box.isEmpty() ) return;
  
			var min = box.min;
			var max = box.max;
  
			/*
			  5____4
			1/___0/|
			| 6__|_7
			2/___3/
  
			0: max.x, max.y, max.z
			1: min.x, max.y, max.z
			2: min.x, min.y, max.z
			3: max.x, min.y, max.z
			4: max.x, max.y, min.z
			5: min.x, max.y, min.z
			6: min.x, min.y, min.z
			7: max.x, min.y, min.z
			*/
  
			var position = this.geometry.attributes.position;
			var array = position.array;
  
			array[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;
			array[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;
			array[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;
			array[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;
			array[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;
			array[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;
			array[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;
			array[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;
  
			position.needsUpdate = true;
  
			this.geometry.computeBoundingSphere();
  
		};
  
	} )();
  
	BoxHelper.prototype.setFromObject = function ( object ) {
  
		this.object = object;
		this.update();
  
		return this;
  
	};
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function Box3Helper( box, hex ) {
  
		this.type = 'Box3Helper';
  
		this.box = box;
  
		var color = ( hex !== undefined ) ? hex : 0xffff00;
  
		var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
  
		var positions = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 1, - 1, 1, - 1, - 1 ];
  
		var geometry = new BufferGeometry();
  
		geometry.setIndex( new BufferAttribute( indices, 1 ) );
  
		geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
  
		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );
  
		this.geometry.computeBoundingSphere();
  
	}
  
	Box3Helper.prototype = Object.create( LineSegments.prototype );
	Box3Helper.prototype.constructor = Box3Helper;
  
	Box3Helper.prototype.updateMatrixWorld = function ( force ) {
  
		var box = this.box;
  
		if ( box.isEmpty() ) return;
  
		box.getCenter( this.position );
  
		box.getSize( this.scale );
  
		this.scale.multiplyScalar( 0.5 );
  
		Object3D.prototype.updateMatrixWorld.call( this, force );
  
	};
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 */
  
	function PlaneHelper( plane, size, hex ) {
  
		this.type = 'PlaneHelper';
  
		this.plane = plane;
  
		this.size = ( size === undefined ) ? 1 : size;
  
		var color = ( hex !== undefined ) ? hex : 0xffff00;
  
		var positions = [ 1, - 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 ];
  
		var geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
		geometry.computeBoundingSphere();
  
		Line.call( this, geometry, new LineBasicMaterial( { color: color } ) );
  
		//
  
		var positions2 = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, - 1, 1, 1, - 1, 1 ];
  
		var geometry2 = new BufferGeometry();
		geometry2.addAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) );
		geometry2.computeBoundingSphere();
  
		this.add( new Mesh( geometry2, new MeshBasicMaterial( { color: color, opacity: 0.2, transparent: true, depthWrite: false } ) ) );
  
	}
  
	PlaneHelper.prototype = Object.create( Line.prototype );
	PlaneHelper.prototype.constructor = PlaneHelper;
  
	PlaneHelper.prototype.updateMatrixWorld = function ( force ) {
  
		var scale = - this.plane.constant;
  
		if ( Math.abs( scale ) < 1e-8 ) scale = 1e-8; // sign does not matter
  
		this.scale.set( 0.5 * this.size, 0.5 * this.size, scale );
  
		this.children[ 0 ].material.side = ( scale < 0 ) ? BackSide : FrontSide; // renderer flips side when determinant < 0; flipping not wanted here
  
		this.lookAt( this.plane.normal );
  
		Object3D.prototype.updateMatrixWorld.call( this, force );
  
	};
  
	/**
	 * @author WestLangley / http://github.com/WestLangley
	 * @author zz85 / http://github.com/zz85
	 * @author bhouston / http://clara.io
	 *
	 * Creates an arrow for visualizing directions
	 *
	 * Parameters:
	 *  dir - Vector3
	 *  origin - Vector3
	 *  length - Number
	 *  color - color in hex value
	 *  headLength - Number
	 *  headWidth - Number
	 */
  
	var lineGeometry, coneGeometry;
  
	function ArrowHelper( dir, origin, length, color, headLength, headWidth ) {
  
		// dir is assumed to be normalized
  
		Object3D.call( this );
  
		if ( color === undefined ) color = 0xffff00;
		if ( length === undefined ) length = 1;
		if ( headLength === undefined ) headLength = 0.2 * length;
		if ( headWidth === undefined ) headWidth = 0.2 * headLength;
  
		if ( lineGeometry === undefined ) {
  
			lineGeometry = new BufferGeometry();
			lineGeometry.addAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );
  
			coneGeometry = new CylinderBufferGeometry( 0, 0.5, 1, 5, 1 );
			coneGeometry.translate( 0, - 0.5, 0 );
  
		}
  
		this.position.copy( origin );
  
		this.line = new Line( lineGeometry, new LineBasicMaterial( { color: color } ) );
		this.line.matrixAutoUpdate = false;
		this.add( this.line );
  
		this.cone = new Mesh( coneGeometry, new MeshBasicMaterial( { color: color } ) );
		this.cone.matrixAutoUpdate = false;
		this.add( this.cone );
  
		this.setDirection( dir );
		this.setLength( length, headLength, headWidth );
  
	}
  
	ArrowHelper.prototype = Object.create( Object3D.prototype );
	ArrowHelper.prototype.constructor = ArrowHelper;
  
	ArrowHelper.prototype.setDirection = ( function () {
  
		var axis = new Vector3();
		var radians;
  
		return function setDirection( dir ) {
  
			// dir is assumed to be normalized
  
			if ( dir.y > 0.99999 ) {
  
				this.quaternion.set( 0, 0, 0, 1 );
  
			} else if ( dir.y < - 0.99999 ) {
  
				this.quaternion.set( 1, 0, 0, 0 );
  
			} else {
  
				axis.set( dir.z, 0, - dir.x ).normalize();
  
				radians = Math.acos( dir.y );
  
				this.quaternion.setFromAxisAngle( axis, radians );
  
			}
  
		};
  
	}() );
  
	ArrowHelper.prototype.setLength = function ( length, headLength, headWidth ) {
  
		if ( headLength === undefined ) headLength = 0.2 * length;
		if ( headWidth === undefined ) headWidth = 0.2 * headLength;
  
		this.line.scale.set( 1, Math.max( 0, length - headLength ), 1 );
		this.line.updateMatrix();
  
		this.cone.scale.set( headWidth, headLength, headWidth );
		this.cone.position.y = length;
		this.cone.updateMatrix();
  
	};
  
	ArrowHelper.prototype.setColor = function ( color ) {
  
		this.line.material.color.copy( color );
		this.cone.material.color.copy( color );
  
	};
  
	/**
	 * @author sroucheray / http://sroucheray.org/
	 * @author mrdoob / http://mrdoob.com/
	 */
  
	function AxesHelper( size ) {
  
		size = size || 1;
  
		var vertices = [
			0, 0, 0,	size, 0, 0,
			0, 0, 0,	0, size, 0,
			0, 0, 0,	0, 0, size
		];
  
		var colors = [
			1, 0, 0,	1, 0.6, 0,
			0, 1, 0,	0.6, 1, 0,
			0, 0, 1,	0, 0.6, 1
		];
  
		var geometry = new BufferGeometry();
		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
  
		var material = new LineBasicMaterial( { vertexColors: VertexColors } );
  
		LineSegments.call( this, geometry, material );
  
	}
  
	AxesHelper.prototype = Object.create( LineSegments.prototype );
	AxesHelper.prototype.constructor = AxesHelper;
  
	//
  
	Curve.create = function ( construct, getPoint ) {
  
		console.log( 'THREE.Curve.create() has been deprecated' );
  
		construct.prototype = Object.create( Curve.prototype );
		construct.prototype.constructor = construct;
		construct.prototype.getPoint = getPoint;
  
		return construct;
  
	};
  
	//
  
	Object.assign( CurvePath.prototype, {
  
		createPointsGeometry: function ( divisions ) {
  
			console.warn( 'THREE.CurvePath: .createPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );
  
			// generate geometry from path points (for Line or Points objects)
  
			var pts = this.getPoints( divisions );
			return this.createGeometry( pts );
  
		},
  
		createSpacedPointsGeometry: function ( divisions ) {
  
			console.warn( 'THREE.CurvePath: .createSpacedPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );
  
			// generate geometry from equidistant sampling along the path
  
			var pts = this.getSpacedPoints( divisions );
			return this.createGeometry( pts );
  
		},
  
		createGeometry: function ( points ) {
  
			console.warn( 'THREE.CurvePath: .createGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );
  
			var geometry = new Geometry();
  
			for ( var i = 0, l = points.length; i < l; i ++ ) {
  
				var point = points[ i ];
				geometry.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );
  
			}
  
			return geometry;
  
		}
  
	} );
  
	//
  
	Object.assign( Path.prototype, {
  
		fromPoints: function ( points ) {
  
			console.warn( 'THREE.Path: .fromPoints() has been renamed to .setFromPoints().' );
			this.setFromPoints( points );
  
		}
  
	} );
  
	//
  
	function Spline( points ) {
  
		console.warn( 'THREE.Spline has been removed. Use THREE.CatmullRomCurve3 instead.' );
  
		CatmullRomCurve3.call( this, points );
		this.type = 'catmullrom';
  
	}
  
	Spline.prototype = Object.create( CatmullRomCurve3.prototype );
  
	Object.assign( Spline.prototype, {
  
		initFromArray: function ( /* a */ ) {
  
			console.error( 'THREE.Spline: .initFromArray() has been removed.' );
  
		},
		getControlPointsArray: function ( /* optionalTarget */ ) {
  
			console.error( 'THREE.Spline: .getControlPointsArray() has been removed.' );
  
		},
		reparametrizeByArcLength: function ( /* samplingCoef */ ) {
  
			console.error( 'THREE.Spline: .reparametrizeByArcLength() has been removed.' );
  
		}
  
	} );
  
	GridHelper.prototype.setColors = function () {
  
		console.error( 'THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.' );
  
	};
  
	SkeletonHelper.prototype.update = function () {
  
		console.error( 'THREE.SkeletonHelper: update() no longer needs to be called.' );
  
	};
  
	//
  
	Object.assign( Loader.prototype, {
  
		extractUrlBase: function ( url ) {
  
			console.warn( 'THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.' );
			return LoaderUtils.extractUrlBase( url );
  
		}
  
	} );
  
	//
  
	Object.assign( Box2.prototype, {
  
		center: function ( optionalTarget ) {
  
			console.warn( 'THREE.Box2: .center() has been renamed to .getCenter().' );
			return this.getCenter( optionalTarget );
  
		},
		empty: function () {
  
			console.warn( 'THREE.Box2: .empty() has been renamed to .isEmpty().' );
			return this.isEmpty();
  
		},
		isIntersectionBox: function ( box ) {
  
			console.warn( 'THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().' );
			return this.intersectsBox( box );
  
		},
		size: function ( optionalTarget ) {
  
			console.warn( 'THREE.Box2: .size() has been renamed to .getSize().' );
			return this.getSize( optionalTarget );
  
		}
	} );
  
	Object.assign( Box3.prototype, {
  
		center: function ( optionalTarget ) {
  
			console.warn( 'THREE.Box3: .center() has been renamed to .getCenter().' );
			return this.getCenter( optionalTarget );
  
		},
		empty: function () {
  
			console.warn( 'THREE.Box3: .empty() has been renamed to .isEmpty().' );
			return this.isEmpty();
  
		},
		isIntersectionBox: function ( box ) {
  
			console.warn( 'THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().' );
			return this.intersectsBox( box );
  
		},
		isIntersectionSphere: function ( sphere ) {
  
			console.warn( 'THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
			return this.intersectsSphere( sphere );
  
		},
		size: function ( optionalTarget ) {
  
			console.warn( 'THREE.Box3: .size() has been renamed to .getSize().' );
			return this.getSize( optionalTarget );
  
		}
	} );
  
	Line3.prototype.center = function ( optionalTarget ) {
  
		console.warn( 'THREE.Line3: .center() has been renamed to .getCenter().' );
		return this.getCenter( optionalTarget );
  
	};
  
	Object.assign( _Math, {
  
		random16: function () {
  
			console.warn( 'THREE.Math: .random16() has been deprecated. Use Math.random() instead.' );
			return Math.random();
  
		},
  
		nearestPowerOfTwo: function ( value ) {
  
			console.warn( 'THREE.Math: .nearestPowerOfTwo() has been renamed to .floorPowerOfTwo().' );
			return _Math.floorPowerOfTwo( value );
  
		},
  
		nextPowerOfTwo: function ( value ) {
  
			console.warn( 'THREE.Math: .nextPowerOfTwo() has been renamed to .ceilPowerOfTwo().' );
			return _Math.ceilPowerOfTwo( value );
  
		}
  
	} );
  
	Object.assign( Matrix3.prototype, {
  
		flattenToArrayOffset: function ( array, offset ) {
  
			console.warn( "THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead." );
			return this.toArray( array, offset );
  
		},
		multiplyVector3: function ( vector ) {
  
			console.warn( 'THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.' );
			return vector.applyMatrix3( this );
  
		},
		multiplyVector3Array: function ( /* a */ ) {
  
			console.error( 'THREE.Matrix3: .multiplyVector3Array() has been removed.' );
  
		},
		applyToBuffer: function ( buffer /*, offset, length */ ) {
  
			console.warn( 'THREE.Matrix3: .applyToBuffer() has been removed. Use matrix.applyToBufferAttribute( attribute ) instead.' );
			return this.applyToBufferAttribute( buffer );
  
		},
		applyToVector3Array: function ( /* array, offset, length */ ) {
  
			console.error( 'THREE.Matrix3: .applyToVector3Array() has been removed.' );
  
		}
  
	} );
  
	Object.assign( Matrix4.prototype, {
  
		extractPosition: function ( m ) {
  
			console.warn( 'THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().' );
			return this.copyPosition( m );
  
		},
		flattenToArrayOffset: function ( array, offset ) {
  
			console.warn( "THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead." );
			return this.toArray( array, offset );
  
		},
		getPosition: function () {
  
			var v1;
  
			return function getPosition() {
  
				if ( v1 === undefined ) v1 = new Vector3();
				console.warn( 'THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.' );
				return v1.setFromMatrixColumn( this, 3 );
  
			};
  
		}(),
		setRotationFromQuaternion: function ( q ) {
  
			console.warn( 'THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().' );
			return this.makeRotationFromQuaternion( q );
  
		},
		multiplyToArray: function () {
  
			console.warn( 'THREE.Matrix4: .multiplyToArray() has been removed.' );
  
		},
		multiplyVector3: function ( vector ) {
  
			console.warn( 'THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
			return vector.applyMatrix4( this );
  
		},
		multiplyVector4: function ( vector ) {
  
			console.warn( 'THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
			return vector.applyMatrix4( this );
  
		},
		multiplyVector3Array: function ( /* a */ ) {
  
			console.error( 'THREE.Matrix4: .multiplyVector3Array() has been removed.' );
  
		},
		rotateAxis: function ( v ) {
  
			console.warn( 'THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.' );
			v.transformDirection( this );
  
		},
		crossVector: function ( vector ) {
  
			console.warn( 'THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
			return vector.applyMatrix4( this );
  
		},
		translate: function () {
  
			console.error( 'THREE.Matrix4: .translate() has been removed.' );
  
		},
		rotateX: function () {
  
			console.error( 'THREE.Matrix4: .rotateX() has been removed.' );
  
		},
		rotateY: function () {
  
			console.error( 'THREE.Matrix4: .rotateY() has been removed.' );
  
		},
		rotateZ: function () {
  
			console.error( 'THREE.Matrix4: .rotateZ() has been removed.' );
  
		},
		rotateByAxis: function () {
  
			console.error( 'THREE.Matrix4: .rotateByAxis() has been removed.' );
  
		},
		applyToBuffer: function ( buffer /*, offset, length */ ) {
  
			console.warn( 'THREE.Matrix4: .applyToBuffer() has been removed. Use matrix.applyToBufferAttribute( attribute ) instead.' );
			return this.applyToBufferAttribute( buffer );
  
		},
		applyToVector3Array: function ( /* array, offset, length */ ) {
  
			console.error( 'THREE.Matrix4: .applyToVector3Array() has been removed.' );
  
		},
		makeFrustum: function ( left, right, bottom, top, near, far ) {
  
			console.warn( 'THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.' );
			return this.makePerspective( left, right, top, bottom, near, far );
  
		}
  
	} );
  
	Plane.prototype.isIntersectionLine = function ( line ) {
  
		console.warn( 'THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().' );
		return this.intersectsLine( line );
  
	};
  
	Quaternion.prototype.multiplyVector3 = function ( vector ) {
  
		console.warn( 'THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.' );
		return vector.applyQuaternion( this );
  
	};
  
	Object.assign( Ray.prototype, {
  
		isIntersectionBox: function ( box ) {
  
			console.warn( 'THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().' );
			return this.intersectsBox( box );
  
		},
		isIntersectionPlane: function ( plane ) {
  
			console.warn( 'THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().' );
			return this.intersectsPlane( plane );
  
		},
		isIntersectionSphere: function ( sphere ) {
  
			console.warn( 'THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
			return this.intersectsSphere( sphere );
  
		}
  
	} );
  
	Object.assign( Triangle.prototype, {
  
		area: function () {
  
			console.warn( 'THREE.Triangle: .area() has been renamed to .getArea().' );
			return this.getArea();
  
		},
		barycoordFromPoint: function ( point, target ) {
  
			console.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );
			return this.getBarycoord( point, target );
  
		},
		midpoint: function ( target ) {
  
			console.warn( 'THREE.Triangle: .midpoint() has been renamed to .getMidpoint().' );
			return this.getMidpoint( target );
  
		},
		normal: function ( target ) {
  
			console.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );
			return this.getNormal( target );
  
		},
		plane: function ( target ) {
  
			console.warn( 'THREE.Triangle: .plane() has been renamed to .getPlane().' );
			return this.getPlane( target );
  
		}
  
	} );
  
	Object.assign( Triangle, {
  
		barycoordFromPoint: function ( point, a, b, c, target ) {
  
			console.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );
			return Triangle.getBarycoord( point, a, b, c, target );
  
		},
		normal: function ( a, b, c, target ) {
  
			console.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );
			return Triangle.getNormal( a, b, c, target );
  
		}
  
	} );
  
	Object.assign( Shape.prototype, {
  
		extractAllPoints: function ( divisions ) {
  
			console.warn( 'THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.' );
			return this.extractPoints( divisions );
  
		},
		extrude: function ( options ) {
  
			console.warn( 'THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.' );
			return new ExtrudeGeometry( this, options );
  
		},
		makeGeometry: function ( options ) {
  
			console.warn( 'THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.' );
			return new ShapeGeometry( this, options );
  
		}
  
	} );
  
	Object.assign( Vector2.prototype, {
  
		fromAttribute: function ( attribute, index, offset ) {
  
			console.warn( 'THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().' );
			return this.fromBufferAttribute( attribute, index, offset );
  
		},
		distanceToManhattan: function ( v ) {
  
			console.warn( 'THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );
			return this.manhattanDistanceTo( v );
  
		},
		lengthManhattan: function () {
  
			console.warn( 'THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().' );
			return this.manhattanLength();
  
		}
  
	} );
  
	Object.assign( Vector3.prototype, {
  
		setEulerFromRotationMatrix: function () {
  
			console.error( 'THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.' );
  
		},
		setEulerFromQuaternion: function () {
  
			console.error( 'THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.' );
  
		},
		getPositionFromMatrix: function ( m ) {
  
			console.warn( 'THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().' );
			return this.setFromMatrixPosition( m );
  
		},
		getScaleFromMatrix: function ( m ) {
  
			console.warn( 'THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().' );
			return this.setFromMatrixScale( m );
  
		},
		getColumnFromMatrix: function ( index, matrix ) {
  
			console.warn( 'THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().' );
			return this.setFromMatrixColumn( matrix, index );
  
		},
		applyProjection: function ( m ) {
  
			console.warn( 'THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.' );
			return this.applyMatrix4( m );
  
		},
		fromAttribute: function ( attribute, index, offset ) {
  
			console.warn( 'THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().' );
			return this.fromBufferAttribute( attribute, index, offset );
  
		},
		distanceToManhattan: function ( v ) {
  
			console.warn( 'THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );
			return this.manhattanDistanceTo( v );
  
		},
		lengthManhattan: function () {
  
			console.warn( 'THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().' );
			return this.manhattanLength();
  
		}
  
	} );
  
	Object.assign( Vector4.prototype, {
  
		fromAttribute: function ( attribute, index, offset ) {
  
			console.warn( 'THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().' );
			return this.fromBufferAttribute( attribute, index, offset );
  
		},
		lengthManhattan: function () {
  
			console.warn( 'THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().' );
			return this.manhattanLength();
  
		}
  
	} );
  
	//
  
	Object.assign( Geometry.prototype, {
  
		computeTangents: function () {
  
			console.error( 'THREE.Geometry: .computeTangents() has been removed.' );
  
		},
		computeLineDistances: function () {
  
			console.error( 'THREE.Geometry: .computeLineDistances() has been removed. Use THREE.Line.computeLineDistances() instead.' );
  
		}
  
	} );
  
	Object.assign( Object3D.prototype, {
  
		getChildByName: function ( name ) {
  
			console.warn( 'THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().' );
			return this.getObjectByName( name );
  
		},
		renderDepth: function () {
  
			console.warn( 'THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.' );
  
		},
		translate: function ( distance, axis ) {
  
			console.warn( 'THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.' );
			return this.translateOnAxis( axis, distance );
  
		},
		getWorldRotation: function () {
  
			console.error( 'THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.' );
  
		}
  
	} );
  
	Object.defineProperties( Object3D.prototype, {
  
		eulerOrder: {
			get: function () {
  
				console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
				return this.rotation.order;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
				this.rotation.order = value;
  
			}
		},
		useQuaternion: {
			get: function () {
  
				console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );
  
			},
			set: function () {
  
				console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );
  
			}
		}
  
	} );
  
	Object.defineProperties( LOD.prototype, {
  
		objects: {
			get: function () {
  
				console.warn( 'THREE.LOD: .objects has been renamed to .levels.' );
				return this.levels;
  
			}
		}
  
	} );
  
	Object.defineProperty( Skeleton.prototype, 'useVertexTexture', {
  
		get: function () {
  
			console.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );
  
		},
		set: function () {
  
			console.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );
  
		}
  
	} );
  
	Object.defineProperty( Curve.prototype, '__arcLengthDivisions', {
  
		get: function () {
  
			console.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );
			return this.arcLengthDivisions;
  
		},
		set: function ( value ) {
  
			console.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );
			this.arcLengthDivisions = value;
  
		}
  
	} );
  
	//
  
	PerspectiveCamera.prototype.setLens = function ( focalLength, filmGauge ) {
  
		console.warn( "THREE.PerspectiveCamera.setLens is deprecated. " +
				"Use .setFocalLength and .filmGauge for a photographic setup." );
  
		if ( filmGauge !== undefined ) this.filmGauge = filmGauge;
		this.setFocalLength( focalLength );
  
	};
  
	//
  
	Object.defineProperties( Light.prototype, {
		onlyShadow: {
			set: function () {
  
				console.warn( 'THREE.Light: .onlyShadow has been removed.' );
  
			}
		},
		shadowCameraFov: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraFov is now .shadow.camera.fov.' );
				this.shadow.camera.fov = value;
  
			}
		},
		shadowCameraLeft: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraLeft is now .shadow.camera.left.' );
				this.shadow.camera.left = value;
  
			}
		},
		shadowCameraRight: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraRight is now .shadow.camera.right.' );
				this.shadow.camera.right = value;
  
			}
		},
		shadowCameraTop: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraTop is now .shadow.camera.top.' );
				this.shadow.camera.top = value;
  
			}
		},
		shadowCameraBottom: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.' );
				this.shadow.camera.bottom = value;
  
			}
		},
		shadowCameraNear: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraNear is now .shadow.camera.near.' );
				this.shadow.camera.near = value;
  
			}
		},
		shadowCameraFar: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowCameraFar is now .shadow.camera.far.' );
				this.shadow.camera.far = value;
  
			}
		},
		shadowCameraVisible: {
			set: function () {
  
				console.warn( 'THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.' );
  
			}
		},
		shadowBias: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowBias is now .shadow.bias.' );
				this.shadow.bias = value;
  
			}
		},
		shadowDarkness: {
			set: function () {
  
				console.warn( 'THREE.Light: .shadowDarkness has been removed.' );
  
			}
		},
		shadowMapWidth: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.' );
				this.shadow.mapSize.width = value;
  
			}
		},
		shadowMapHeight: {
			set: function ( value ) {
  
				console.warn( 'THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.' );
				this.shadow.mapSize.height = value;
  
			}
		}
	} );
  
	//
  
	Object.defineProperties( BufferAttribute.prototype, {
  
		length: {
			get: function () {
  
				console.warn( 'THREE.BufferAttribute: .length has been deprecated. Use .count instead.' );
				return this.array.length;
  
			}
		},
		copyIndicesArray: function ( /* indices */ ) {
  
			console.error( 'THREE.BufferAttribute: .copyIndicesArray() has been removed.' );
  
		}
  
	} );
  
	Object.assign( BufferGeometry.prototype, {
  
		addIndex: function ( index ) {
  
			console.warn( 'THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().' );
			this.setIndex( index );
  
		},
		addDrawCall: function ( start, count, indexOffset ) {
  
			if ( indexOffset !== undefined ) {
  
				console.warn( 'THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.' );
  
			}
			console.warn( 'THREE.BufferGeometry: .addDrawCall() is now .addGroup().' );
			this.addGroup( start, count );
  
		},
		clearDrawCalls: function () {
  
			console.warn( 'THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().' );
			this.clearGroups();
  
		},
		computeTangents: function () {
  
			console.warn( 'THREE.BufferGeometry: .computeTangents() has been removed.' );
  
		},
		computeOffsets: function () {
  
			console.warn( 'THREE.BufferGeometry: .computeOffsets() has been removed.' );
  
		}
  
	} );
  
	Object.defineProperties( BufferGeometry.prototype, {
  
		drawcalls: {
			get: function () {
  
				console.error( 'THREE.BufferGeometry: .drawcalls has been renamed to .groups.' );
				return this.groups;
  
			}
		},
		offsets: {
			get: function () {
  
				console.warn( 'THREE.BufferGeometry: .offsets has been renamed to .groups.' );
				return this.groups;
  
			}
		}
  
	} );
  
	//
  
	Object.assign( ExtrudeBufferGeometry.prototype, {
  
		getArrays: function () {
  
			console.error( 'THREE.ExtrudeBufferGeometry: .getArrays() has been removed.' );
  
		},
  
		addShapeList: function () {
  
			console.error( 'THREE.ExtrudeBufferGeometry: .addShapeList() has been removed.' );
  
		},
  
		addShape: function () {
  
			console.error( 'THREE.ExtrudeBufferGeometry: .addShape() has been removed.' );
  
		}
  
	} );
  
	//
  
	Object.defineProperties( Uniform.prototype, {
  
		dynamic: {
			set: function () {
  
				console.warn( 'THREE.Uniform: .dynamic has been removed. Use object.onBeforeRender() instead.' );
  
			}
		},
		onUpdate: {
			value: function () {
  
				console.warn( 'THREE.Uniform: .onUpdate() has been removed. Use object.onBeforeRender() instead.' );
				return this;
  
			}
		}
  
	} );
  
	//
  
	Object.defineProperties( Material.prototype, {
  
		wrapAround: {
			get: function () {
  
				console.warn( 'THREE.Material: .wrapAround has been removed.' );
  
			},
			set: function () {
  
				console.warn( 'THREE.Material: .wrapAround has been removed.' );
  
			}
		},
		wrapRGB: {
			get: function () {
  
				console.warn( 'THREE.Material: .wrapRGB has been removed.' );
				return new Color();
  
			}
		},
  
		shading: {
			get: function () {
  
				console.error( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
				this.flatShading = ( value === FlatShading );
  
			}
		}
  
	} );
  
	Object.defineProperties( MeshPhongMaterial.prototype, {
  
		metal: {
			get: function () {
  
				console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.' );
				return false;
  
			},
			set: function () {
  
				console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead' );
  
			}
		}
  
	} );
  
	Object.defineProperties( ShaderMaterial.prototype, {
  
		derivatives: {
			get: function () {
  
				console.warn( 'THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
				return this.extensions.derivatives;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
				this.extensions.derivatives = value;
  
			}
		}
  
	} );
  
	//
  
	Object.assign( WebGLRenderer.prototype, {
  
		animate: function ( callback ) {
  
			console.warn( 'THREE.WebGLRenderer: .animate() is now .setAnimationLoop().' );
			this.setAnimationLoop( callback );
  
		},
  
		getCurrentRenderTarget: function () {
  
			console.warn( 'THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().' );
			return this.getRenderTarget();
  
		},
  
		getMaxAnisotropy: function () {
  
			console.warn( 'THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().' );
			return this.capabilities.getMaxAnisotropy();
  
		},
  
		getPrecision: function () {
  
			console.warn( 'THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.' );
			return this.capabilities.precision;
  
		},
  
		resetGLState: function () {
  
			console.warn( 'THREE.WebGLRenderer: .resetGLState() is now .state.reset().' );
			return this.state.reset();
  
		},
  
		supportsFloatTextures: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \'OES_texture_float\' ).' );
			return this.extensions.get( 'OES_texture_float' );
  
		},
		supportsHalfFloatTextures: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \'OES_texture_half_float\' ).' );
			return this.extensions.get( 'OES_texture_half_float' );
  
		},
		supportsStandardDerivatives: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \'OES_standard_derivatives\' ).' );
			return this.extensions.get( 'OES_standard_derivatives' );
  
		},
		supportsCompressedTextureS3TC: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \'WEBGL_compressed_texture_s3tc\' ).' );
			return this.extensions.get( 'WEBGL_compressed_texture_s3tc' );
  
		},
		supportsCompressedTexturePVRTC: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \'WEBGL_compressed_texture_pvrtc\' ).' );
			return this.extensions.get( 'WEBGL_compressed_texture_pvrtc' );
  
		},
		supportsBlendMinMax: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \'EXT_blend_minmax\' ).' );
			return this.extensions.get( 'EXT_blend_minmax' );
  
		},
		supportsVertexTextures: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.' );
			return this.capabilities.vertexTextures;
  
		},
		supportsInstancedArrays: function () {
  
			console.warn( 'THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \'ANGLE_instanced_arrays\' ).' );
			return this.extensions.get( 'ANGLE_instanced_arrays' );
  
		},
		enableScissorTest: function ( boolean ) {
  
			console.warn( 'THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().' );
			this.setScissorTest( boolean );
  
		},
		initMaterial: function () {
  
			console.warn( 'THREE.WebGLRenderer: .initMaterial() has been removed.' );
  
		},
		addPrePlugin: function () {
  
			console.warn( 'THREE.WebGLRenderer: .addPrePlugin() has been removed.' );
  
		},
		addPostPlugin: function () {
  
			console.warn( 'THREE.WebGLRenderer: .addPostPlugin() has been removed.' );
  
		},
		updateShadowMap: function () {
  
			console.warn( 'THREE.WebGLRenderer: .updateShadowMap() has been removed.' );
  
		},
		setFaceCulling: function () {
  
			console.warn( 'THREE.WebGLRenderer: .setFaceCulling() has been removed.' );
  
		}
  
	} );
  
	Object.defineProperties( WebGLRenderer.prototype, {
  
		shadowMapEnabled: {
			get: function () {
  
				return this.shadowMap.enabled;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.' );
				this.shadowMap.enabled = value;
  
			}
		},
		shadowMapType: {
			get: function () {
  
				return this.shadowMap.type;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.' );
				this.shadowMap.type = value;
  
			}
		},
		shadowMapCullFace: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );
				return undefined;
  
			},
			set: function ( /* value */ ) {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );
  
			}
		}
	} );
  
	Object.defineProperties( WebGLShadowMap.prototype, {
  
		cullFace: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );
				return undefined;
  
			},
			set: function ( /* cullFace */ ) {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );
  
			}
		},
		renderReverseSided: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );
				return undefined;
  
			},
			set: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );
  
			}
		},
		renderSingleSided: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );
				return undefined;
  
			},
			set: function () {
  
				console.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );
  
			}
		}
  
	} );
  
	//
  
	Object.defineProperties( WebGLRenderTarget.prototype, {
  
		wrapS: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
				return this.texture.wrapS;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
				this.texture.wrapS = value;
  
			}
		},
		wrapT: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
				return this.texture.wrapT;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
				this.texture.wrapT = value;
  
			}
		},
		magFilter: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
				return this.texture.magFilter;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
				this.texture.magFilter = value;
  
			}
		},
		minFilter: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
				return this.texture.minFilter;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
				this.texture.minFilter = value;
  
			}
		},
		anisotropy: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
				return this.texture.anisotropy;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
				this.texture.anisotropy = value;
  
			}
		},
		offset: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
				return this.texture.offset;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
				this.texture.offset = value;
  
			}
		},
		repeat: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
				return this.texture.repeat;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
				this.texture.repeat = value;
  
			}
		},
		format: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
				return this.texture.format;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
				this.texture.format = value;
  
			}
		},
		type: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
				return this.texture.type;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
				this.texture.type = value;
  
			}
		},
		generateMipmaps: {
			get: function () {
  
				console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
				return this.texture.generateMipmaps;
  
			},
			set: function ( value ) {
  
				console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
				this.texture.generateMipmaps = value;
  
			}
		}
  
	} );
  
	//
  
	Object.defineProperties( WebVRManager.prototype, {
  
		standing: {
			set: function ( /* value */ ) {
  
				console.warn( 'THREE.WebVRManager: .standing has been removed.' );
  
			}
		}
  
	} );
  
	//
  
	Audio.prototype.load = function ( file ) {
  
		console.warn( 'THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.' );
		var scope = this;
		var audioLoader = new AudioLoader();
		audioLoader.load( file, function ( buffer ) {
  
			scope.setBuffer( buffer );
  
		} );
		return this;
  
	};
  
	AudioAnalyser.prototype.getData = function () {
  
		console.warn( 'THREE.AudioAnalyser: .getData() is now .getFrequencyData().' );
		return this.getFrequencyData();
  
	};
  
	//
  
	CubeCamera.prototype.updateCubeMap = function ( renderer, scene ) {
  
		console.warn( 'THREE.CubeCamera: .updateCubeMap() is now .update().' );
		return this.update( renderer, scene );
  
	};
  
	/**
	 * @author dmarcos / https://github.com/dmarcos
	 * @author mrdoob / http://mrdoob.com
	 */
	var VRControls = function ( object, onError ) {
  
		var scope = this;
  
		var vrDisplay, vrDisplays;
  
		var standingMatrix = new Matrix4();
  
		var frameData = null;
  
		if ( 'VRFrameData' in window ) {
  
			frameData = new VRFrameData();
  
		}
  
		function gotVRDisplays( displays ) {
  
			vrDisplays = displays;
  
			if ( displays.length > 0 ) {
  
				vrDisplay = displays[ 0 ];
  
			} else {
  
				if ( onError ) onError( 'VR input not available.' );
  
			}
  
		}
  
		if ( navigator.getVRDisplays ) {
  
			navigator.getVRDisplays().then( gotVRDisplays ).catch( function () {
  
				console.warn( 'VRControls: Unable to get VR Displays' );
  
			} );
  
		}
  
		// the Rift SDK returns the position in meters
		// this scale factor allows the user to define how meters
		// are converted to scene units.
  
		this.scale = 1;
  
		// If true will use "standing space" coordinate system where y=0 is the
		// floor and x=0, z=0 is the center of the room.
		this.standing = false;
  
		// Distance from the users eyes to the floor in meters. Used when
		// standing=true but the VRDisplay doesn't provide stageParameters.
		this.userHeight = 1.6;
  
		this.getVRDisplay = function () {
  
			return vrDisplay;
  
		};
  
		this.setVRDisplay = function ( value ) {
  
			vrDisplay = value;
  
		};
  
		this.getVRDisplays = function () {
  
			console.warn( 'VRControls: getVRDisplays() is being deprecated.' );
			return vrDisplays;
  
		};
  
		this.getStandingMatrix = function () {
  
			return standingMatrix;
  
		};
  
		this.update = function () {
  
			if ( vrDisplay ) {
  
				var pose;
  
				if ( vrDisplay.getFrameData ) {
  
					vrDisplay.getFrameData( frameData );
					pose = frameData.pose;
  
				} else if ( vrDisplay.getPose ) {
  
					pose = vrDisplay.getPose();
  
				}
  
				if ( pose.orientation !== null ) {
  
					object.quaternion.fromArray( pose.orientation );
  
				}
  
				if ( pose.position !== null ) {
  
					object.position.fromArray( pose.position );
  
				} else {
  
					object.position.set( 0, 0, 0 );
  
				}
  
				if ( this.standing ) {
  
					if ( vrDisplay.stageParameters ) {
  
						object.updateMatrix();
  
						standingMatrix.fromArray( vrDisplay.stageParameters.sittingToStandingTransform );
						object.applyMatrix( standingMatrix );
  
					} else {
  
						object.position.setY( object.position.y + this.userHeight );
  
					}
  
				}
  
				object.position.multiplyScalar( scope.scale );
  
			}
  
		};
  
		this.dispose = function () {
  
			vrDisplay = null;
  
		};
  
	};
  
	/**
	 * @author dmarcos / https://github.com/dmarcos
	 * @author mrdoob / http://mrdoob.com
	 *
	 * WebVR Spec: http://mozvr.github.io/webvr-spec/webvr.html
	 *
	 * Firefox: http://mozvr.com/downloads/
	 * Chromium: https://webvr.info/get-chrome
	 */
	var VREffect = function ( renderer, onError ) {
  
		var vrDisplay, vrDisplays;
		var eyeTranslationL = new Vector3();
		var eyeTranslationR = new Vector3();
		var renderRectL, renderRectR;
		var headMatrix = new Matrix4();
		var eyeMatrixL = new Matrix4();
		var eyeMatrixR = new Matrix4();
  
		var frameData = null;
  
		if ( 'VRFrameData' in window ) {
  
			frameData = new window.VRFrameData();
  
		}
  
		function gotVRDisplays( displays ) {
  
			vrDisplays = displays;
  
			if ( displays.length > 0 ) {
  
				vrDisplay = displays[ 0 ];
  
			} else {
  
				if ( onError ) onError( 'HMD not available' );
  
			}
  
		}
  
		if ( navigator.getVRDisplays ) {
  
			navigator.getVRDisplays().then( gotVRDisplays ).catch( function () {
  
				console.warn( 'VREffect: Unable to get VR Displays' );
  
			} );
  
		}
  
		//
  
		this.isPresenting = false;
  
		var scope = this;
  
		var rendererSize = renderer.getSize();
		var rendererUpdateStyle = false;
		var rendererPixelRatio = renderer.getPixelRatio();
  
		this.getVRDisplay = function () {
  
			return vrDisplay;
  
		};
  
		this.setVRDisplay = function ( value ) {
  
			vrDisplay = value;
  
		};
  
		this.getVRDisplays = function () {
  
			console.warn( 'VREffect: getVRDisplays() is being deprecated.' );
			return vrDisplays;
  
		};
  
		this.setSize = function ( width, height, updateStyle ) {
  
			rendererSize = { width: width, height: height };
			rendererUpdateStyle = updateStyle;
  
			if ( scope.isPresenting ) {
  
				var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
				renderer.setPixelRatio( 1 );
				renderer.setSize( eyeParamsL.renderWidth * 2, eyeParamsL.renderHeight, false );
  
			} else {
  
				renderer.setPixelRatio( rendererPixelRatio );
				renderer.setSize( width, height, updateStyle );
  
			}
  
		};
  
		// VR presentation
  
		var canvas = renderer.domElement;
		var defaultLeftBounds = [ 0.0, 0.0, 0.5, 1.0 ];
		var defaultRightBounds = [ 0.5, 0.0, 0.5, 1.0 ];
  
		function onVRDisplayPresentChange() {
  
			var wasPresenting = scope.isPresenting;
			scope.isPresenting = vrDisplay !== undefined && vrDisplay.isPresenting;
  
			if ( scope.isPresenting ) {
  
				var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
				var eyeWidth = eyeParamsL.renderWidth;
				var eyeHeight = eyeParamsL.renderHeight;
  
				if ( ! wasPresenting ) {
  
					rendererPixelRatio = renderer.getPixelRatio();
					rendererSize = renderer.getSize();
  
					renderer.setPixelRatio( 1 );
					renderer.setSize( eyeWidth * 2, eyeHeight, false );
  
				}
  
			} else if ( wasPresenting ) {
  
				renderer.setPixelRatio( rendererPixelRatio );
				renderer.setSize( rendererSize.width, rendererSize.height, rendererUpdateStyle );
  
			}
  
		}
  
		window.addEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );
  
		this.setFullScreen = function ( boolean ) {
  
			return new Promise( function ( resolve, reject ) {
  
				if ( vrDisplay === undefined ) {
  
					reject( new Error( 'No VR hardware found.' ) );
					return;
  
				}
  
				if ( scope.isPresenting === boolean ) {
  
					resolve();
					return;
  
				}
  
				if ( boolean ) {
  
					resolve( vrDisplay.requestPresent( [ { source: canvas } ] ) );
  
				} else {
  
					resolve( vrDisplay.exitPresent() );
  
				}
  
			} );
  
		};
  
		this.requestPresent = function () {
  
			return this.setFullScreen( true );
  
		};
  
		this.exitPresent = function () {
  
			return this.setFullScreen( false );
  
		};
  
		this.requestAnimationFrame = function ( f ) {
  
			if ( vrDisplay !== undefined ) {
  
				return vrDisplay.requestAnimationFrame( f );
  
			} else {
  
				return window.requestAnimationFrame( f );
  
			}
  
		};
  
		this.cancelAnimationFrame = function ( h ) {
  
			if ( vrDisplay !== undefined ) {
  
				vrDisplay.cancelAnimationFrame( h );
  
			} else {
  
				window.cancelAnimationFrame( h );
  
			}
  
		};
  
		this.submitFrame = function () {
  
			if ( vrDisplay !== undefined && scope.isPresenting ) {
  
				vrDisplay.submitFrame();
  
			}
  
		};
  
		this.autoSubmitFrame = true;
  
		// render
  
		var cameraL = new PerspectiveCamera();
		cameraL.layers.enable( 1 );
  
		var cameraR = new PerspectiveCamera();
		cameraR.layers.enable( 2 );
  
		this.render = function ( scene, camera, renderTarget, forceClear ) {
  
			if ( vrDisplay && scope.isPresenting ) {
  
				var autoUpdate = scene.autoUpdate;
  
				if ( autoUpdate ) {
  
					scene.updateMatrixWorld();
					scene.autoUpdate = false;
  
				}
  
				if ( Array.isArray( scene ) ) {
  
					console.warn( 'VREffect.render() no longer supports arrays. Use object.layers instead.' );
					scene = scene[ 0 ];
  
				}
  
				// When rendering we don't care what the recommended size is, only what the actual size
				// of the backbuffer is.
				var size = renderer.getSize();
				var layers = vrDisplay.getLayers();
				var leftBounds;
				var rightBounds;
  
				if ( layers.length ) {
  
					var layer = layers[ 0 ];
  
					leftBounds = layer.leftBounds !== null && layer.leftBounds.length === 4 ? layer.leftBounds : defaultLeftBounds;
					rightBounds = layer.rightBounds !== null && layer.rightBounds.length === 4 ? layer.rightBounds : defaultRightBounds;
  
				} else {
  
					leftBounds = defaultLeftBounds;
					rightBounds = defaultRightBounds;
  
				}
  
				renderRectL = {
					x: Math.round( size.width * leftBounds[ 0 ] ),
					y: Math.round( size.height * leftBounds[ 1 ] ),
					width: Math.round( size.width * leftBounds[ 2 ] ),
					height: Math.round( size.height * leftBounds[ 3 ] )
				};
				renderRectR = {
					x: Math.round( size.width * rightBounds[ 0 ] ),
					y: Math.round( size.height * rightBounds[ 1 ] ),
					width: Math.round( size.width * rightBounds[ 2 ] ),
					height: Math.round( size.height * rightBounds[ 3 ] )
				};
  
				if ( renderTarget ) {
  
					renderer.setRenderTarget( renderTarget );
					renderTarget.scissorTest = true;
  
				} else {
  
					renderer.setRenderTarget( null );
					renderer.setScissorTest( true );
  
				}
  
				if ( renderer.autoClear || forceClear ) renderer.clear();
  
				if ( camera.parent === null ) camera.updateMatrixWorld();
  
				camera.matrixWorld.decompose( cameraL.position, cameraL.quaternion, cameraL.scale );
  
				cameraR.position.copy( cameraL.position );
				cameraR.quaternion.copy( cameraL.quaternion );
				cameraR.scale.copy( cameraL.scale );
  
				if ( vrDisplay.getFrameData ) {
  
					vrDisplay.depthNear = camera.near;
					vrDisplay.depthFar = camera.far;
  
					vrDisplay.getFrameData( frameData );
  
					cameraL.projectionMatrix.elements = frameData.leftProjectionMatrix;
					cameraR.projectionMatrix.elements = frameData.rightProjectionMatrix;
  
					getEyeMatrices( frameData );
  
					cameraL.updateMatrix();
					cameraL.matrix.multiply( eyeMatrixL );
					cameraL.matrix.decompose( cameraL.position, cameraL.quaternion, cameraL.scale );
  
					cameraR.updateMatrix();
					cameraR.matrix.multiply( eyeMatrixR );
					cameraR.matrix.decompose( cameraR.position, cameraR.quaternion, cameraR.scale );
  
				} else {
  
					var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
					var eyeParamsR = vrDisplay.getEyeParameters( 'right' );
  
					cameraL.projectionMatrix = fovToProjection( eyeParamsL.fieldOfView, true, camera.near, camera.far );
					cameraR.projectionMatrix = fovToProjection( eyeParamsR.fieldOfView, true, camera.near, camera.far );
  
					eyeTranslationL.fromArray( eyeParamsL.offset );
					eyeTranslationR.fromArray( eyeParamsR.offset );
  
					cameraL.translateOnAxis( eyeTranslationL, cameraL.scale.x );
					cameraR.translateOnAxis( eyeTranslationR, cameraR.scale.x );
  
				}
  
				// render left eye
				if ( renderTarget ) {
  
					renderTarget.viewport.set( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
					renderTarget.scissor.set( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
  
				} else {
  
					renderer.setViewport( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
					renderer.setScissor( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
  
				}
				renderer.render( scene, cameraL, renderTarget, forceClear );
  
				// render right eye
				if ( renderTarget ) {
  
					renderTarget.viewport.set( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
					renderTarget.scissor.set( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
  
				} else {
  
					renderer.setViewport( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
					renderer.setScissor( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
  
				}
				renderer.render( scene, cameraR, renderTarget, forceClear );
  
				if ( renderTarget ) {
  
					renderTarget.viewport.set( 0, 0, size.width, size.height );
					renderTarget.scissor.set( 0, 0, size.width, size.height );
					renderTarget.scissorTest = false;
					renderer.setRenderTarget( null );
  
				} else {
  
					renderer.setViewport( 0, 0, size.width, size.height );
					renderer.setScissorTest( false );
  
				}
  
				if ( autoUpdate ) {
  
					scene.autoUpdate = true;
  
				}
  
				if ( scope.autoSubmitFrame ) {
  
					scope.submitFrame();
  
				}
  
				return;
  
			}
  
			// Regular render mode if not HMD
  
			renderer.render( scene, camera, renderTarget, forceClear );
  
		};
  
		this.dispose = function () {
  
			window.removeEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );
  
		};
  
		//
  
		var poseOrientation = new Quaternion();
		var posePosition = new Vector3();
  
		// Compute model matrices of the eyes with respect to the head.
		function getEyeMatrices( frameData ) {
  
			// Compute the matrix for the position of the head based on the pose
			if ( frameData.pose.orientation ) {
  
				poseOrientation.fromArray( frameData.pose.orientation );
				headMatrix.makeRotationFromQuaternion( poseOrientation );
  
			}	else {
  
				headMatrix.identity();
  
			}
  
			if ( frameData.pose.position ) {
  
				posePosition.fromArray( frameData.pose.position );
				headMatrix.setPosition( posePosition );
  
			}
  
			// The view matrix transforms vertices from sitting space to eye space. As such, the view matrix can be thought of as a product of two matrices:
			// headToEyeMatrix * sittingToHeadMatrix
  
			// The headMatrix that we've calculated above is the model matrix of the head in sitting space, which is the inverse of sittingToHeadMatrix.
			// So when we multiply the view matrix with headMatrix, we're left with headToEyeMatrix:
			// viewMatrix * headMatrix = headToEyeMatrix * sittingToHeadMatrix * headMatrix = headToEyeMatrix
  
			eyeMatrixL.fromArray( frameData.leftViewMatrix );
			eyeMatrixL.multiply( headMatrix );
			eyeMatrixR.fromArray( frameData.rightViewMatrix );
			eyeMatrixR.multiply( headMatrix );
  
			// The eye's model matrix in head space is the inverse of headToEyeMatrix we calculated above.
  
			eyeMatrixL.getInverse( eyeMatrixL );
			eyeMatrixR.getInverse( eyeMatrixR );
  
		}
  
		function fovToNDCScaleOffset( fov ) {
  
			var pxscale = 2.0 / ( fov.leftTan + fov.rightTan );
			var pxoffset = ( fov.leftTan - fov.rightTan ) * pxscale * 0.5;
			var pyscale = 2.0 / ( fov.upTan + fov.downTan );
			var pyoffset = ( fov.upTan - fov.downTan ) * pyscale * 0.5;
			return { scale: [ pxscale, pyscale ], offset: [ pxoffset, pyoffset ] };
  
		}
  
		function fovPortToProjection( fov, rightHanded, zNear, zFar ) {
  
			rightHanded = rightHanded === undefined ? true : rightHanded;
			zNear = zNear === undefined ? 0.01 : zNear;
			zFar = zFar === undefined ? 10000.0 : zFar;
  
			var handednessScale = rightHanded ? - 1.0 : 1.0;
  
			// start with an identity matrix
			var mobj = new Matrix4();
			var m = mobj.elements;
  
			// and with scale/offset info for normalized device coords
			var scaleAndOffset = fovToNDCScaleOffset( fov );
  
			// X result, map clip edges to [-w,+w]
			m[ 0 * 4 + 0 ] = scaleAndOffset.scale[ 0 ];
			m[ 0 * 4 + 1 ] = 0.0;
			m[ 0 * 4 + 2 ] = scaleAndOffset.offset[ 0 ] * handednessScale;
			m[ 0 * 4 + 3 ] = 0.0;
  
			// Y result, map clip edges to [-w,+w]
			// Y offset is negated because this proj matrix transforms from world coords with Y=up,
			// but the NDC scaling has Y=down (thanks D3D?)
			m[ 1 * 4 + 0 ] = 0.0;
			m[ 1 * 4 + 1 ] = scaleAndOffset.scale[ 1 ];
			m[ 1 * 4 + 2 ] = - scaleAndOffset.offset[ 1 ] * handednessScale;
			m[ 1 * 4 + 3 ] = 0.0;
  
			// Z result (up to the app)
			m[ 2 * 4 + 0 ] = 0.0;
			m[ 2 * 4 + 1 ] = 0.0;
			m[ 2 * 4 + 2 ] = zFar / ( zNear - zFar ) * - handednessScale;
			m[ 2 * 4 + 3 ] = ( zFar * zNear ) / ( zNear - zFar );
  
			// W result (= Z in)
			m[ 3 * 4 + 0 ] = 0.0;
			m[ 3 * 4 + 1 ] = 0.0;
			m[ 3 * 4 + 2 ] = handednessScale;
			m[ 3 * 4 + 3 ] = 0.0;
  
			mobj.transpose();
			return mobj;
  
		}
  
		function fovToProjection( fov, rightHanded, zNear, zFar ) {
  
			var DEG2RAD = Math.PI / 180.0;
  
			var fovPort = {
				upTan: Math.tan( fov.upDegrees * DEG2RAD ),
				downTan: Math.tan( fov.downDegrees * DEG2RAD ),
				leftTan: Math.tan( fov.leftDegrees * DEG2RAD ),
				rightTan: Math.tan( fov.rightDegrees * DEG2RAD )
			};
  
			return fovPortToProjection( fovPort, rightHanded, zNear, zFar );
  
		}
  
	};
  
	/**
	 * @author qiao / https://github.com/qiao
	 * @author mrdoob / http://mrdoob.com
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author erich666 / http://erichaines.com
	 */
	var OrbitControls = function ( object, domElement ) {
  
		this.object = object;
  
		this.domElement = ( domElement !== undefined ) ? domElement : document;
  
		// Set to false to disable this control
		this.enabled = true;
  
		// "target" sets the location of focus, where the object orbits around
		this.target = new Vector3();
  
		// How far you can dolly in and out ( PerspectiveCamera only )
		this.minDistance = 0;
		this.maxDistance = Infinity;
  
		// How far you can zoom in and out ( OrthographicCamera only )
		this.minZoom = 0;
		this.maxZoom = Infinity;
  
		// How far you can orbit vertically, upper and lower limits.
		// Range is 0 to Math.PI radians.
		this.minPolarAngle = 0; // radians
		this.maxPolarAngle = Math.PI; // radians
  
		// How far you can orbit horizontally, upper and lower limits.
		// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
		this.minAzimuthAngle = - Infinity; // radians
		this.maxAzimuthAngle = Infinity; // radians
  
		// Set to true to enable damping (inertia)
		// If damping is enabled, you must call controls.update() in your animation loop
		this.enableDamping = false;
		this.dampingFactor = 0.25;
  
		// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
		// Set to false to disable zooming
		this.enableZoom = true;
		this.zoomSpeed = 1.0;
  
		// Set to false to disable rotating
		this.enableRotate = true;
		this.rotateSpeed = 1.0;
  
		// Set to false to disable panning
		this.enablePan = true;
		this.panSpeed = 1.0;
		this.screenSpacePanning = false; // if true, pan in screen-space
		this.keyPanSpeed = 7.0;	// pixels moved per arrow key push
  
		// Set to true to automatically rotate around the target
		// If auto-rotate is enabled, you must call controls.update() in your animation loop
		this.autoRotate = false;
		this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
  
		// Set to false to disable use of the keys
		this.enableKeys = true;
  
		// The four arrow keys
		this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
  
		// Mouse buttons
		this.mouseButtons = { ORBIT: MOUSE.LEFT, ZOOM: MOUSE.MIDDLE, PAN: MOUSE.RIGHT };
  
		// for reset
		this.target0 = this.target.clone();
		this.position0 = this.object.position.clone();
		this.zoom0 = this.object.zoom;
  
		//
		// public methods
		//
  
		this.getPolarAngle = function () {
  
			return spherical.phi;
  
		};
  
		this.getAzimuthalAngle = function () {
  
			return spherical.theta;
  
		};
  
		this.saveState = function () {
  
			scope.target0.copy( scope.target );
			scope.position0.copy( scope.object.position );
			scope.zoom0 = scope.object.zoom;
  
		};
  
		this.reset = function () {
  
			scope.target.copy( scope.target0 );
			scope.object.position.copy( scope.position0 );
			scope.object.zoom = scope.zoom0;
  
			scope.object.updateProjectionMatrix();
			scope.dispatchEvent( changeEvent );
  
			scope.update();
  
			state = STATE.NONE;
  
		};
  
		// this method is exposed, but perhaps it would be better if we can make it private...
		this.update = function () {
  
			var offset = new Vector3();
  
			// so camera.up is the orbit axis
			var quat = new Quaternion().setFromUnitVectors( object.up, new Vector3( 0, 1, 0 ) );
			var quatInverse = quat.clone().inverse();
  
			var lastPosition = new Vector3();
			var lastQuaternion = new Quaternion();
  
			return function update() {
  
				var position = scope.object.position;
  
				offset.copy( position ).sub( scope.target );
  
				// rotate offset to "y-axis-is-up" space
				offset.applyQuaternion( quat );
  
				// angle from z-axis around y-axis
				spherical.setFromVector3( offset );
  
				if ( scope.autoRotate && state === STATE.NONE ) {
  
					scope.rotateLeft( getAutoRotationAngle() );
  
				}
  
				spherical.theta += sphericalDelta.theta;
				spherical.phi += sphericalDelta.phi;
  
				// restrict theta to be between desired limits
				spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) );
  
				// restrict phi to be between desired limits
				spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
  
				spherical.makeSafe();
  
  
				spherical.radius *= scale;
  
				// restrict radius to be between desired limits
				spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );
  
				// move target to panned location
				scope.target.add( panOffset );
  
				offset.setFromSpherical( spherical );
  
				// rotate offset back to "camera-up-vector-is-up" space
				offset.applyQuaternion( quatInverse );
  
				position.copy( scope.target ).add( offset );
  
				scope.object.lookAt( scope.target );
  
				if ( scope.enableDamping === true ) {
  
					sphericalDelta.theta *= ( 1 - scope.dampingFactor );
					sphericalDelta.phi *= ( 1 - scope.dampingFactor );
  
					panOffset.multiplyScalar( 1 - scope.dampingFactor );
  
				} else {
  
					sphericalDelta.set( 0, 0, 0 );
  
					panOffset.set( 0, 0, 0 );
  
				}
  
				scale = 1;
  
				// update condition is:
				// min(camera displacement, camera rotation in radians)^2 > EPS
				// using small-angle approximation cos(x/2) = 1 - x^2 / 8
  
				if ( zoomChanged ||
					lastPosition.distanceToSquared( scope.object.position ) > EPS ||
					8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {
  
					scope.dispatchEvent( changeEvent );
  
					lastPosition.copy( scope.object.position );
					lastQuaternion.copy( scope.object.quaternion );
					zoomChanged = false;
  
					return true;
  
				}
  
				return false;
  
			};
  
		}();
  
		this.dispose = function () {
  
			scope.domElement.removeEventListener( 'contextmenu', onContextMenu, false );
			scope.domElement.removeEventListener( 'mousedown', onMouseDown, false );
			scope.domElement.removeEventListener( 'wheel', onMouseWheel, false );
  
			scope.domElement.removeEventListener( 'touchstart', onTouchStart, false );
			scope.domElement.removeEventListener( 'touchend', onTouchEnd, false );
			scope.domElement.removeEventListener( 'touchmove', onTouchMove, false );
  
			document.removeEventListener( 'mousemove', onMouseMove, false );
			document.removeEventListener( 'mouseup', onMouseUp, false );
  
			window.removeEventListener( 'keydown', onKeyDown, false );
  
			//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
  
		};
  
		//
		// internals
		//
  
		var scope = this;
  
		var changeEvent = { type: 'change' };
		var startEvent = { type: 'start' };
		var endEvent = { type: 'end' };
  
		var STATE = { NONE: - 1, ROTATE: 0, DOLLY: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_DOLLY_PAN: 4 };
  
		var state = STATE.NONE;
  
		var EPS = 0.000001;
  
		// current position in spherical coordinates
		var spherical = new Spherical();
		var sphericalDelta = new Spherical();
  
		var scale = 1;
		var panOffset = new Vector3();
		var zoomChanged = false;
  
		var rotateStart = new Vector2();
		var rotateEnd = new Vector2();
		var rotateDelta = new Vector2();
  
		var panStart = new Vector2();
		var panEnd = new Vector2();
		var panDelta = new Vector2();
  
		var dollyStart = new Vector2();
		var dollyEnd = new Vector2();
		var dollyDelta = new Vector2();
  
		function getAutoRotationAngle() {
  
			return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
  
		}
  
		function getZoomScale() {
  
			return Math.pow( 0.95, scope.zoomSpeed );
  
		}
  
		scope.rotateLeft = function( angle ) {
  
			sphericalDelta.theta -= angle;
  
		};
  
		scope.rotateUp = function( angle ) {
  
			sphericalDelta.phi -= angle;
  
		};
  
		var panLeft = function () {
  
			var v = new Vector3();
  
			return function panLeft( distance, objectMatrix ) {
  
				v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
				v.multiplyScalar( - distance );
  
				panOffset.add( v );
  
			};
  
		}();
  
		var panUp = function () {
  
			var v = new Vector3();
  
			return function panUp( distance, objectMatrix ) {
  
				if ( scope.screenSpacePanning === true ) {
  
					v.setFromMatrixColumn( objectMatrix, 1 );
  
				} else {
  
					v.setFromMatrixColumn( objectMatrix, 0 );
					v.crossVectors( scope.object.up, v );
  
				}
  
				v.multiplyScalar( distance );
  
				panOffset.add( v );
  
			};
  
		}();
  
		// deltaX and deltaY are in pixels; right and down are positive
		var pan = function () {
  
			var offset = new Vector3();
  
			return function pan( deltaX, deltaY ) {
  
				var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
  
				if ( scope.object.isPerspectiveCamera ) {
  
					// perspective
					var position = scope.object.position;
					offset.copy( position ).sub( scope.target );
					var targetDistance = offset.length();
  
					// half of the fov is center to top of screen
					targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );
  
					// we use only clientHeight here so aspect ratio does not distort speed
					panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
					panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );
  
				} else if ( scope.object.isOrthographicCamera ) {
  
					// orthographic
					panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
					panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );
  
				} else {
  
					// camera neither orthographic nor perspective
					console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );
					scope.enablePan = false;
  
				}
  
			};
  
		}();
  
		function dollyIn( dollyScale ) {
  
			if ( scope.object.isPerspectiveCamera ) {
  
				scale /= dollyScale;
  
			} else if ( scope.object.isOrthographicCamera ) {
  
				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;
  
			} else {
  
				console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;
  
			}
  
		}
  
		function dollyOut( dollyScale ) {
  
			if ( scope.object.isPerspectiveCamera ) {
  
				scale *= dollyScale;
  
			} else if ( scope.object.isOrthographicCamera ) {
  
				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;
  
			} else {
  
				console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;
  
			}
  
		}
  
		//
		// event callbacks - update the object state
		//
  
		function handleMouseDownRotate( event ) {
  
			//console.log( 'handleMouseDownRotate' );
  
			rotateStart.set( event.clientX, event.clientY );
  
		}
  
		function handleMouseDownDolly( event ) {
  
			//console.log( 'handleMouseDownDolly' );
  
			dollyStart.set( event.clientX, event.clientY );
  
		}
  
		function handleMouseDownPan( event ) {
  
			//console.log( 'handleMouseDownPan' );
  
			panStart.set( event.clientX, event.clientY );
  
		}
  
		function handleMouseMoveRotate( event ) {
  
			//console.log( 'handleMouseMoveRotate' );
  
			rotateEnd.set( event.clientX, event.clientY );
  
			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
  
			var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
  
			scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
  
			scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
  
			rotateStart.copy( rotateEnd );
  
			scope.update();
  
		}
  
		function handleMouseMoveDolly( event ) {
  
			//console.log( 'handleMouseMoveDolly' );
  
			dollyEnd.set( event.clientX, event.clientY );
  
			dollyDelta.subVectors( dollyEnd, dollyStart );
  
			if ( dollyDelta.y > 0 ) {
  
				dollyIn( getZoomScale() );
  
			} else if ( dollyDelta.y < 0 ) {
  
				dollyOut( getZoomScale() );
  
			}
  
			dollyStart.copy( dollyEnd );
  
			scope.update();
  
		}
  
		function handleMouseMovePan( event ) {
  
			//console.log( 'handleMouseMovePan' );
  
			panEnd.set( event.clientX, event.clientY );
  
			panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
  
			pan( panDelta.x, panDelta.y );
  
			panStart.copy( panEnd );
  
			scope.update();
  
		}
  
		function handleMouseWheel( event ) {
  
			// console.log( 'handleMouseWheel' );
  
			if ( event.deltaY < 0 ) {
  
				dollyOut( getZoomScale() );
  
			} else if ( event.deltaY > 0 ) {
  
				dollyIn( getZoomScale() );
  
			}
  
			scope.update();
  
		}
  
		function handleKeyDown( event ) {
  
			//console.log( 'handleKeyDown' );
  
			switch ( event.keyCode ) {
  
				case scope.keys.UP:
					pan( 0, scope.keyPanSpeed );
					scope.update();
					break;
  
				case scope.keys.BOTTOM:
					pan( 0, - scope.keyPanSpeed );
					scope.update();
					break;
  
				case scope.keys.LEFT:
					pan( scope.keyPanSpeed, 0 );
					scope.update();
					break;
  
				case scope.keys.RIGHT:
					pan( - scope.keyPanSpeed, 0 );
					scope.update();
					break;
  
			}
  
		}
  
		function handleTouchStartRotate( event ) {
  
			//console.log( 'handleTouchStartRotate' );
  
			rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
  
		}
  
		function handleTouchStartDollyPan( event ) {
  
			//console.log( 'handleTouchStartDollyPan' );
  
			if ( scope.enableZoom ) {
  
				var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
				var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
  
				var distance = Math.sqrt( dx * dx + dy * dy );
  
				dollyStart.set( 0, distance );
  
			}
  
			if ( scope.enablePan ) {
  
				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
  
				panStart.set( x, y );
  
			}
  
		}
  
		function handleTouchMoveRotate( event ) {
  
			//console.log( 'handleTouchMoveRotate' );
  
			rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
  
			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
  
			var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
  
			scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
  
			scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
  
			rotateStart.copy( rotateEnd );
  
			scope.update();
  
		}
  
		function handleTouchMoveDollyPan( event ) {
  
			//console.log( 'handleTouchMoveDollyPan' );
  
			if ( scope.enableZoom ) {
  
				var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
				var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
  
				var distance = Math.sqrt( dx * dx + dy * dy );
  
				dollyEnd.set( 0, distance );
  
				dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
  
				dollyIn( dollyDelta.y );
  
				dollyStart.copy( dollyEnd );
  
			}
  
			if ( scope.enablePan ) {
  
				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
  
				panEnd.set( x, y );
  
				panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
  
				pan( panDelta.x, panDelta.y );
  
				panStart.copy( panEnd );
  
			}
  
			scope.update();
  
		}
  
		//
		// event handlers - FSM: listen for events and reset state
		//
  
		function onMouseDown( event ) {
  
			if ( scope.enabled === false ) return;
  
			event.preventDefault();
  
			switch ( event.button ) {
  
				case scope.mouseButtons.ORBIT:
  
					if ( scope.enableRotate === false ) return;
  
					handleMouseDownRotate( event );
  
					state = STATE.ROTATE;
  
					break;
  
				case scope.mouseButtons.ZOOM:
  
					if ( scope.enableZoom === false ) return;
  
					handleMouseDownDolly( event );
  
					state = STATE.DOLLY;
  
					break;
  
				case scope.mouseButtons.PAN:
  
					if ( scope.enablePan === false ) return;
  
					handleMouseDownPan( event );
  
					state = STATE.PAN;
  
					break;
  
			}
  
			if ( state !== STATE.NONE ) {
  
				document.addEventListener( 'mousemove', onMouseMove, false );
				document.addEventListener( 'mouseup', onMouseUp, false );
  
				scope.dispatchEvent( startEvent );
  
			}
  
		}
  
		function onMouseMove( event ) {
  
			if ( scope.enabled === false ) return;
  
			event.preventDefault();
  
			switch ( state ) {
  
				case STATE.ROTATE:
  
					if ( scope.enableRotate === false ) return;
  
					handleMouseMoveRotate( event );
  
					break;
  
				case STATE.DOLLY:
  
					if ( scope.enableZoom === false ) return;
  
					handleMouseMoveDolly( event );
  
					break;
  
				case STATE.PAN:
  
					if ( scope.enablePan === false ) return;
  
					handleMouseMovePan( event );
  
					break;
  
			}
  
		}
  
		function onMouseUp( event ) {
  
			if ( scope.enabled === false ) return;
  
			document.removeEventListener( 'mousemove', onMouseMove, false );
			document.removeEventListener( 'mouseup', onMouseUp, false );
  
			scope.dispatchEvent( endEvent );
  
			state = STATE.NONE;
  
		}
  
		function onMouseWheel( event ) {
  
			if ( scope.enabled === false || scope.enableZoom === false || ( state !== STATE.NONE && state !== STATE.ROTATE ) ) return;
  
			event.preventDefault();
			event.stopPropagation();
  
			scope.dispatchEvent( startEvent );
  
			handleMouseWheel( event );
  
			scope.dispatchEvent( endEvent );
  
		}
  
		function onKeyDown( event ) {
  
			if ( scope.enabled === false || scope.enableKeys === false || scope.enablePan === false ) return;
  
			handleKeyDown( event );
  
		}
  
		function onTouchStart( event ) {
  
			if ( scope.enabled === false ) return;
  
			event.preventDefault();
  
			switch ( event.touches.length ) {
  
				case 1:	// one-fingered touch: rotate
  
					if ( scope.enableRotate === false ) return;
  
					handleTouchStartRotate( event );
  
					state = STATE.TOUCH_ROTATE;
  
					break;
  
				case 2:	// two-fingered touch: dolly-pan
  
					if ( scope.enableZoom === false && scope.enablePan === false ) return;
  
					handleTouchStartDollyPan( event );
  
					state = STATE.TOUCH_DOLLY_PAN;
  
					break;
  
				default:
  
					state = STATE.NONE;
  
			}
  
			if ( state !== STATE.NONE ) {
  
				scope.dispatchEvent( startEvent );
  
			}
  
		}
  
		function onTouchMove( event ) {
  
			if ( scope.enabled === false ) return;
  
			event.preventDefault();
			event.stopPropagation();
  
			switch ( event.touches.length ) {
  
				case 1: // one-fingered touch: rotate
  
					if ( scope.enableRotate === false ) return;
					if ( state !== STATE.TOUCH_ROTATE ) return; // is this needed?
  
					handleTouchMoveRotate( event );
  
					break;
  
				case 2: // two-fingered touch: dolly-pan
  
					if ( scope.enableZoom === false && scope.enablePan === false ) return;
					if ( state !== STATE.TOUCH_DOLLY_PAN ) return; // is this needed?
  
					handleTouchMoveDollyPan( event );
  
					break;
  
				default:
  
					state = STATE.NONE;
  
			}
  
		}
  
		function onTouchEnd( event ) {
  
			if ( scope.enabled === false ) return;
  
			scope.dispatchEvent( endEvent );
  
			state = STATE.NONE;
  
		}
  
		function onContextMenu( event ) {
  
			if ( scope.enabled === false ) return;
  
			event.preventDefault();
  
		}
  
		//
  
		//scope.domElement.addEventListener\( 'contextmenu', onContextMenu, false );
  
		scope.domElement.addEventListener( 'mousedown', onMouseDown, false );
		scope.domElement.addEventListener( 'wheel', onMouseWheel, false );
  
		scope.domElement.addEventListener( 'touchstart', onTouchStart, false );
		scope.domElement.addEventListener( 'touchend', onTouchEnd, false );
		scope.domElement.addEventListener( 'touchmove', onTouchMove, false );
  
		window.addEventListener( 'keydown', onKeyDown, false );
  
		// force an update at start
  
		this.update();
  
	};
  
	OrbitControls.prototype = Object.create( EventDispatcher.prototype );
	OrbitControls.prototype.constructor = OrbitControls;
  
	Object.defineProperties( OrbitControls.prototype, {
  
		center: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .center has been renamed to .target' );
				return this.target;
  
			}
  
		},
  
		// backward compatibility
  
		noZoom: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .noZoom has been deprecated. Use .enableZoom instead.' );
				return ! this.enableZoom;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .noZoom has been deprecated. Use .enableZoom instead.' );
				this.enableZoom = ! value;
  
			}
  
		},
  
		noRotate: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .noRotate has been deprecated. Use .enableRotate instead.' );
				return ! this.enableRotate;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .noRotate has been deprecated. Use .enableRotate instead.' );
				this.enableRotate = ! value;
  
			}
  
		},
  
		noPan: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .noPan has been deprecated. Use .enablePan instead.' );
				return ! this.enablePan;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .noPan has been deprecated. Use .enablePan instead.' );
				this.enablePan = ! value;
  
			}
  
		},
  
		noKeys: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .noKeys has been deprecated. Use .enableKeys instead.' );
				return ! this.enableKeys;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .noKeys has been deprecated. Use .enableKeys instead.' );
				this.enableKeys = ! value;
  
			}
  
		},
  
		staticMoving: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .staticMoving has been deprecated. Use .enableDamping instead.' );
				return ! this.enableDamping;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .staticMoving has been deprecated. Use .enableDamping instead.' );
				this.enableDamping = ! value;
  
			}
  
		},
  
		dynamicDampingFactor: {
  
			get: function () {
  
				console.warn( 'OrbitControls: .dynamicDampingFactor has been renamed. Use .dampingFactor instead.' );
				return this.dampingFactor;
  
			},
  
			set: function ( value ) {
  
				console.warn( 'OrbitControls: .dynamicDampingFactor has been renamed. Use .dampingFactor instead.' );
				this.dampingFactor = value;
  
			}
  
		}
  
	} );
  
	/**
	 * @author richt / http://richt.me
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * W3C Device Orientation control (http://w3c.github.io/deviceorientation/spec-source-orientation.html)
	 */
	var DeviceOrientationControls = function ( object ) {
  
		var scope = this;
  
		this.object = object;
		this.object.rotation.reorder( 'YXZ' );
  
		this.enabled = true;
  
		this.deviceOrientation = {};
		this.screenOrientation = 0;
  
		this.alphaOffset = 0; // radians
  
		var onDeviceOrientationChangeEvent = function ( event ) {
  
			scope.deviceOrientation = event;
  
		};
  
		var onScreenOrientationChangeEvent = function () {
  
			scope.screenOrientation = window.orientation || 0;
  
		};
  
		// The angles alpha, beta and gamma form a set of intrinsic Tait-Bryan angles of type Z-X'-Y''
  
		var setObjectQuaternion = function () {
  
			var zee = new Vector3( 0, 0, 1 );
  
			var euler = new Euler();
  
			var q0 = new Quaternion();
  
			var q1 = new Quaternion( - Math.sqrt( 0.5 ), 0, 0, Math.sqrt( 0.5 ) ); // - PI/2 around the x-axis
  
			return function ( quaternion, alpha, beta, gamma, orient ) {
  
				euler.set( beta, alpha, - gamma, 'YXZ' ); // 'ZXY' for the device, but 'YXZ' for us
  
				quaternion.setFromEuler( euler ); // orient the device
  
				quaternion.multiply( q1 ); // camera looks out the back of the device, not the top
  
				quaternion.multiply( q0.setFromAxisAngle( zee, - orient ) ); // adjust for screen orientation
  
			};
  
		}();
  
		this.connect = function () {
  
			onScreenOrientationChangeEvent(); // run once on load
  
			window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
			window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
  
			scope.enabled = true;
  
		};
  
		this.disconnect = function () {
  
			window.removeEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
			window.removeEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
  
			scope.enabled = false;
  
		};
  
		this.update = function () {
  
			if ( scope.enabled === false ) return;
  
			var device = scope.deviceOrientation;
  
			if ( device ) {
  
				var alpha = device.alpha ? _Math.degToRad( device.alpha ) + scope.alphaOffset : 0; // Z
  
				var beta = device.beta ? _Math.degToRad( device.beta ) : 0; // X'
  
				var gamma = device.gamma ? _Math.degToRad( device.gamma ) : 0; // Y''
  
				var orient = scope.screenOrientation ? _Math.degToRad( scope.screenOrientation ) : 0; // O
  
				setObjectQuaternion( scope.object.quaternion, alpha, beta, gamma, orient );
  
			}
  
  
		};
  
		this.dispose = function () {
  
			scope.disconnect();
  
		};
  
		this.connect();
  
	};
  
	/**
	 * Convert a quaternion to an angle
	 *
	 * Taken from https://stackoverflow.com/a/35448946
	 * Thanks P. Ellul
	 */
  
	function Quat2Angle(x, y, z, w) {
	  var test = x * y + z * w; // singularity at north pole
  
	  if (test > 0.499) {
		var _yaw = 2 * Math.atan2(x, w);
  
		var _pitch = Math.PI / 2;
  
		var _roll = 0;
		return new Vector3(_pitch, _roll, _yaw);
	  } // singularity at south pole
  
  
	  if (test < -0.499) {
		var _yaw2 = -2 * Math.atan2(x, w);
  
		var _pitch2 = -Math.PI / 2;
  
		var _roll2 = 0;
		return new Vector3(_pitch2, _roll2, _yaw2);
	  }
  
	  var sqx = x * x;
	  var sqy = y * y;
	  var sqz = z * z;
	  var yaw = Math.atan2(2 * y * w - 2 * x * z, 1 - 2 * sqy - 2 * sqz);
	  var pitch = Math.asin(2 * test);
	  var roll = Math.atan2(2 * x * w - 2 * y * z, 1 - 2 * sqx - 2 * sqz);
	  return new Vector3(pitch, roll, yaw);
	}
  
	var OrbitOrientationControls =
	/*#__PURE__*/
	function () {
	  function OrbitOrientationControls(options) {
		this.object = options.camera;
		this.domElement = options.canvas;
		this.orbit = new OrbitControls(this.object, this.domElement);
		this.speed = 0.5;
		this.orbit.target.set(0, 0, -1);
		this.orbit.enableZoom = false;
		this.orbit.enablePan = false;
		this.orbit.rotateSpeed = -this.speed; // if orientation is supported
  
		if (options.orientation) {
		  this.orientation = new DeviceOrientationControls(this.object);
		} // if projection is not full view
		// limit the rotation angle in order to not display back half view
  
  
		if (options.halfView) {
		  this.orbit.minAzimuthAngle = -Math.PI / 4;
		  this.orbit.maxAzimuthAngle = Math.PI / 4;
		}
	  }
  
	  var _proto = OrbitOrientationControls.prototype;
  
	  _proto.update = function update() {
		// orientation updates the camera using quaternions and
		// orbit updates the camera using angles. They are incompatible
		// and one update overrides the other. So before
		// orbit overrides orientation we convert our quaternion changes to
		// an angle change. Then save the angle into orbit so that
		// it will take those into account when it updates the camera and overrides
		// our changes
		if (this.orientation) {
		  this.orientation.update();
		  var quat = this.orientation.object.quaternion;
		  var currentAngle = Quat2Angle(quat.x, quat.y, quat.z, quat.w); // we also have to store the last angle since quaternions are b
  
		  if (typeof this.lastAngle_ === 'undefined') {
			this.lastAngle_ = currentAngle;
		  }
  
		  this.orbit.rotateLeft((this.lastAngle_.z - currentAngle.z) * (1 + this.speed));
		  this.orbit.rotateUp((this.lastAngle_.y - currentAngle.y) * (1 + this.speed));
		  this.lastAngle_ = currentAngle;
		}
  
		this.orbit.update();
	  };
  
	  _proto.dispose = function dispose() {
		this.orbit.dispose();
  
		if (this.orientation) {
		  this.orientation.dispose();
		}
	  };
  
	  return OrbitOrientationControls;
	}();
  
	var corsSupport = function () {
	  var video = document$1.createElement('video');
	  video.crossOrigin = 'anonymous';
	  return video.hasAttribute('crossorigin');
	}();
	var validProjections = ['360', '360_LR', '360_TB', '360_CUBE', 'EAC', 'EAC_LR', 'NONE', 'AUTO', 'Sphere', 'Cube', 'equirectangular', '180', '180_LR', '180_MONO'];
	var getInternalProjectionName = function getInternalProjectionName(projection) {
	  if (!projection) {
		return;
	  }
  
	  projection = projection.toString().trim();
  
	  if (/sphere/i.test(projection)) {
		return '360';
	  }
  
	  if (/cube/i.test(projection)) {
		return '360_CUBE';
	  }
  
	  if (/equirectangular/i.test(projection)) {
		return '360';
	  }
  
	  for (var i = 0; i < validProjections.length; i++) {
		if (new RegExp('^' + validProjections[i] + '$', 'i').test(projection)) {
		  return validProjections[i];
		}
	  }
	};
  
	/**
	 * This class reacts to interactions with the canvas and
	 * triggers appropriate functionality on the player. Right now
	 * it does two things:
	 *
	 * 1. A `mousedown`/`touchstart` followed by `touchend`/`mouseup` without any
	 *    `touchmove` or `mousemove` toggles play/pause on the player
	 * 2. Only moving on/clicking the control bar or toggling play/pause should
	 *    show the control bar. Moving around the scene in the canvas should not.
	 */
  
	var CanvasPlayerControls =
	/*#__PURE__*/
	function (_videojs$EventTarget) {
	  inheritsLoose(CanvasPlayerControls, _videojs$EventTarget);
  
	  function CanvasPlayerControls(player, canvas) {
		var _this;
  
		_this = _videojs$EventTarget.call(this) || this;
		_this.player = player;
		_this.canvas = canvas;
		_this.onMoveEnd = videojs.bind(assertThisInitialized(_this), _this.onMoveEnd);
		_this.onMoveStart = videojs.bind(assertThisInitialized(_this), _this.onMoveStart);
		_this.onMove = videojs.bind(assertThisInitialized(_this), _this.onMove);
		_this.onControlBarMove = videojs.bind(assertThisInitialized(_this), _this.onControlBarMove);
  
		_this.player.controlBar.on(['mousedown', 'mousemove', 'mouseup', 'touchstart', 'touchmove', 'touchend'], _this.onControlBarMove); // we have to override these here because
		// video.js listens for user activity on the video element
		// and makes the user active when the mouse moves.
		// We don't want that for 3d videos
  
  
		_this.oldReportUserActivity = _this.player.reportUserActivity;
  
		_this.player.reportUserActivity = function () {}; // canvas movements
  
  
		_this.canvas.addEventListener('mousedown', _this.onMoveStart);
  
		_this.canvas.addEventListener('touchstart', _this.onMoveStart);
  
		_this.canvas.addEventListener('mousemove', _this.onMove);
  
		_this.canvas.addEventListener('touchmove', _this.onMove);
  
		_this.canvas.addEventListener('mouseup', _this.onMoveEnd);
  
		_this.canvas.addEventListener('touchend', _this.onMoveEnd);
  
		_this.shouldTogglePlay = false;
		return _this;
	  }
  
	  var _proto = CanvasPlayerControls.prototype;
  
	  _proto.togglePlay = function togglePlay() {
		if (this.player.paused()) {
		  this.player.play();
		} else {
		  this.player.pause();
		}
	  };
  
	  _proto.onMoveStart = function onMoveStart(e) {
		// if the player does not have a controlbar or
		// the move was a mouse click but not left click do not
		// toggle play.
		if (!this.player.controls() || e.type === 'mousedown' && !videojs.dom.isSingleLeftClick(e)) {
		  this.shouldTogglePlay = false;
		  return;
		}
  
		this.shouldTogglePlay = true;
		this.touchMoveCount_ = 0;
	  };
  
	  _proto.onMoveEnd = function onMoveEnd(e) {
		// We want to have the same behavior in VR360 Player and standard player.
		// in touchend we want to know if was a touch click, for a click we show the bar,
		// otherwise continue with the mouse logic.
		//
		// Maximum movement allowed during a touch event to still be considered a tap
		// Other popular libs use anywhere from 2 (hammer.js) to 15,
		// so 10 seems like a nice, round number.
		if (e.type === 'touchend' && this.touchMoveCount_ < 10) {
		  if (this.player.userActive() === false) {
			this.player.userActive(true);
			return;
		  }
  
		  this.player.userActive(false);
		  return;
		}
  
		if (!this.shouldTogglePlay) {
		  return;
		} // We want the same behavior in Desktop for VR360  and standard player
  
  
		if (e.type == 'mouseup') {
		  this.togglePlay();
		}
	  };
  
	  _proto.onMove = function onMove(e) {
		// Increase touchMoveCount_ since Android detects 1 - 6 touches when user click normally
		this.touchMoveCount_++;
		this.shouldTogglePlay = false;
	  };
  
	  _proto.onControlBarMove = function onControlBarMove(e) {
		this.player.userActive(true);
	  };
  
	  _proto.dispose = function dispose() {
		this.canvas.removeEventListener('mousedown', this.onMoveStart);
		this.canvas.removeEventListener('touchstart', this.onMoveStart);
		this.canvas.removeEventListener('mousemove', this.onMove);
		this.canvas.removeEventListener('touchmove', this.onMove);
		this.canvas.removeEventListener('mouseup', this.onMoveEnd);
		this.canvas.removeEventListener('touchend', this.onMoveEnd);
		this.player.controlBar.off(['mousedown', 'mousemove', 'mouseup', 'touchstart', 'touchmove', 'touchend'], this.onControlBarMove);
		this.player.reportUserActivity = this.oldReportUserActivity;
	  };
  
	  return CanvasPlayerControls;
	}(videojs.EventTarget);
  
	/**
	 * This class manages ambisonic decoding and binaural rendering via Omnitone library.
	 */
  
	var OmnitoneController =
	/*#__PURE__*/
	function (_videojs$EventTarget) {
	  inheritsLoose(OmnitoneController, _videojs$EventTarget);
  
	  /**
	   * Omnitone controller class.
	   *
	   * @class
	   * @param {AudioContext} audioContext - associated AudioContext.
	   * @param {Omnitone library} omnitone - Omnitone library element.
	   * @param {HTMLVideoElement} video - vidoe tag element.
	   * @param {Object} options - omnitone options.
	   */
	  function OmnitoneController(audioContext, omnitone, video, options) {
		var _this;
  
		_this = _videojs$EventTarget.call(this) || this;
		var settings = videojs.mergeOptions({
		  // Safari uses the different AAC decoder than FFMPEG. The channel order is
		  // The default 4ch AAC channel layout for FFMPEG AAC channel ordering.
		  channelMap: videojs.browser.IS_SAFARI ? [2, 0, 1, 3] : [0, 1, 2, 3],
		  ambisonicOrder: 1
		}, options);
		_this.videoElementSource = audioContext.createMediaElementSource(video);
		_this.foaRenderer = omnitone.createFOARenderer(audioContext, settings);
  
		_this.foaRenderer.initialize().then(function () {
		  if (audioContext.state === 'suspended') {
			_this.trigger({
			  type: 'audiocontext-suspended'
			});
		  }
  
		  _this.videoElementSource.connect(_this.foaRenderer.input);
  
		  _this.foaRenderer.output.connect(audioContext.destination);
  
		  _this.initialized = true;
  
		  _this.trigger({
			type: 'omnitone-ready'
		  });
		}, function (error) {
		  videojs.log.warn("videojs-vr: Omnitone initializes failed with the following error: " + error + ")");
		});
  
		return _this;
	  }
	  /**
	   * Updates the rotation of the Omnitone decoder based on three.js camera matrix.
	   *
	   * @param {Camera} camera Three.js camera object
	   */
  
  
	  var _proto = OmnitoneController.prototype;
  
	  _proto.update = function update(camera) {
		if (!this.initialized) {
		  return;
		}
  
		this.foaRenderer.setRotationMatrixFromCamera(camera.matrix);
	  }
	  /**
	   * Destroys the controller and does any necessary cleanup.
	   */
	  ;
  
	  _proto.dispose = function dispose() {
		this.initialized = false;
		this.foaRenderer.setRenderingMode('bypass');
		this.foaRenderer = null;
	  };
  
	  return OmnitoneController;
	}(videojs.EventTarget);
  
	var Button = videojs.getComponent('Button');
  
	var CardboardButton =
	/*#__PURE__*/
	function (_Button) {
	  inheritsLoose(CardboardButton, _Button);
  
	  function CardboardButton(player, options) {
		var _this;
  
		_this = _Button.call(this, player, options) || this;
		_this.handleVrDisplayActivate_ = videojs.bind(assertThisInitialized(_this), _this.handleVrDisplayActivate_);
		_this.handleVrDisplayDeactivate_ = videojs.bind(assertThisInitialized(_this), _this.handleVrDisplayDeactivate_);
		_this.handleVrDisplayPresentChange_ = videojs.bind(assertThisInitialized(_this), _this.handleVrDisplayPresentChange_);
		_this.handleOrientationChange_ = videojs.bind(assertThisInitialized(_this), _this.handleOrientationChange_);
		window$1.addEventListener('orientationchange', _this.handleOrientationChange_);
		window$1.addEventListener('vrdisplayactivate', _this.handleVrDisplayActivate_);
		window$1.addEventListener('vrdisplaydeactivate', _this.handleVrDisplayDeactivate_); // vrdisplaypresentchange does not fire activate or deactivate
		// and happens when hitting the back button during cardboard mode
		// so we need to make sure we stay in the correct state by
		// listening to it and checking if we are presenting it or not
  
		window$1.addEventListener('vrdisplaypresentchange', _this.handleVrDisplayPresentChange_); // we cannot show the cardboard button in fullscreen on
		// android as it breaks the controls, and makes it impossible
		// to exit cardboard mode
  
		if (videojs.browser.IS_ANDROID) {
		  _this.on(player, 'fullscreenchange', function () {
			if (player.isFullscreen()) {
			  _this.hide();
			} else {
			  _this.show();
			}
		  });
		}
  
		return _this;
	  }
  
	  var _proto = CardboardButton.prototype;
  
	  _proto.buildCSSClass = function buildCSSClass() {
		return "vjs-button-vr " + _Button.prototype.buildCSSClass.call(this);
	  };
  
	  _proto.handleVrDisplayPresentChange_ = function handleVrDisplayPresentChange_() {
		if (!this.player_.vr().vrDisplay.isPresenting && this.active_) {
		  this.handleVrDisplayDeactivate_();
		}
  
		if (this.player_.vr().vrDisplay.isPresenting && !this.active_) {
		  this.handleVrDisplayActivate_();
		}
	  };
  
	  _proto.handleOrientationChange_ = function handleOrientationChange_() {
		if (this.active_ && videojs.browser.IS_IOS) {
		  this.changeSize_();
		}
	  };
  
	  _proto.changeSize_ = function changeSize_() {
		this.player_.width(window$1.innerWidth);
		this.player_.height(window$1.innerHeight);
		window$1.dispatchEvent(new window$1.Event('resize'));
	  };
  
	  _proto.handleVrDisplayActivate_ = function handleVrDisplayActivate_() {
		// we mimic fullscreen on IOS
		if (videojs.browser.IS_IOS) {
		  this.oldWidth_ = this.player_.currentWidth();
		  this.oldHeight_ = this.player_.currentHeight();
		  this.player_.enterFullWindow();
		  this.changeSize_();
		}
  
		this.active_ = true;
	  };
  
	  _proto.handleVrDisplayDeactivate_ = function handleVrDisplayDeactivate_() {
		// un-mimic fullscreen on iOS
		if (videojs.browser.IS_IOS) {
		  if (this.oldWidth_) {
			this.player_.width(this.oldWidth_);
		  }
  
		  if (this.oldHeight_) {
			this.player_.height(this.oldHeight_);
		  }
  
		  this.player_.exitFullWindow();
		}
  
		this.active_ = false;
	  };
  
	  _proto.handleClick = function handleClick(event) {
		// if cardboard mode display is not active, activate it
		// otherwise deactivate it
		if (!this.active_) {
		  // This starts playback mode when the cardboard button
		  // is clicked on Android. We need to do this as the controls
		  // disappear
		  if (!this.player_.hasStarted() && videojs.browser.IS_ANDROID) {
			this.player_.play();
		  }
  
		  window$1.dispatchEvent(new window$1.Event('vrdisplayactivate'));
		} else {
		  window$1.dispatchEvent(new window$1.Event('vrdisplaydeactivate'));
		}
	  };
  
	  _proto.dispose = function dispose() {
		_Button.prototype.dispose.call(this);
  
		window$1.removeEventListener('vrdisplayactivate', this.handleVrDisplayActivate_);
		window$1.removeEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_);
		window$1.removeEventListener('vrdisplaypresentchange', this.handleVrDisplayPresentChange_);
	  };
  
	  return CardboardButton;
	}(Button);
  
	videojs.registerComponent('CardboardButton', CardboardButton);
  
	var BigPlayButton = videojs.getComponent('BigPlayButton');
  
	var BigVrPlayButton =
	/*#__PURE__*/
	function (_BigPlayButton) {
	  inheritsLoose(BigVrPlayButton, _BigPlayButton);
  
	  function BigVrPlayButton() {
		return _BigPlayButton.apply(this, arguments) || this;
	  }
  
	  var _proto = BigVrPlayButton.prototype;
  
	  _proto.buildCSSClass = function buildCSSClass() {
		return "vjs-big-vr-play-button " + _BigPlayButton.prototype.buildCSSClass.call(this);
	  };
  
	  return BigVrPlayButton;
	}(BigPlayButton);
  
	videojs.registerComponent('BigVrPlayButton', BigVrPlayButton);
  
	var defaults = {
	  debug: false,
	  omnitone: false,
	  forceCardboard: false,
	  omnitoneOptions: {},
	  projection: 'AUTO',
	  sphereDetail: 32
	};
	var errors = {
	  'web-vr-out-of-date': {
		headline: '360 is out of date',
		type: '360_OUT_OF_DATE',
		message: "Your browser supports 360 but not the latest version. See <a href='http://webvr.info'>http://webvr.info</a> for more info."
	  },
	  'web-vr-not-supported': {
		headline: '360 not supported on this device',
		type: '360_NOT_SUPPORTED',
		message: "Your browser does not support 360. See <a href='http://webvr.info'>http://webvr.info</a> for assistance."
	  },
	  'web-vr-hls-cors-not-supported': {
		headline: '360 HLS video not supported on this device',
		type: '360_NOT_SUPPORTED',
		message: "Your browser/device does not support HLS 360 video. See <a href='http://webvr.info'>http://webvr.info</a> for assistance."
	  }
	};
	var Plugin = videojs.getPlugin('plugin');
	var Component = videojs.getComponent('Component');
  
	var VR =
	/*#__PURE__*/
	function (_Plugin) {
	  inheritsLoose(VR, _Plugin);
  
	  function VR(player, options) {
		var _this;
  
		var settings = videojs.mergeOptions(defaults, options);
		_this = _Plugin.call(this, player, settings) || this;
		_this.options_ = settings;
		_this.player_ = player;
		_this.bigPlayButtonIndex_ = player.children().indexOf(player.getChild('BigPlayButton')) || 0; // custom videojs-errors integration boolean
  
		_this.videojsErrorsSupport_ = !!videojs.errors;
  
		if (_this.videojsErrorsSupport_) {
		  player.errors({
			errors: errors
		  });
		} // IE 11 does not support enough webgl to be supported
		// older safari does not support cors, so it wont work
  
  
		if (videojs.browser.IE_VERSION || !corsSupport) {
		  // if a player triggers error before 'loadstart' is fired
		  // video.js will reset the error overlay
		  _this.player_.on('loadstart', function () {
			_this.triggerError_({
			  code: 'web-vr-not-supported',
			  dismiss: false
			});
		  });
  
		  return assertThisInitialized(_this);
		}
  
		_this.polyfill_ = new WebVRPolyfill({
		  // do not show rotate instructions
		  ROTATE_INSTRUCTIONS_DISABLED: true
		});
		_this.polyfill_ = new WebVRPolyfill();
		_this.handleVrDisplayActivate_ = videojs.bind(assertThisInitialized(_this), _this.handleVrDisplayActivate_);
		_this.handleVrDisplayDeactivate_ = videojs.bind(assertThisInitialized(_this), _this.handleVrDisplayDeactivate_);
		_this.handleResize_ = videojs.bind(assertThisInitialized(_this), _this.handleResize_);
		_this.animate_ = videojs.bind(assertThisInitialized(_this), _this.animate_);
  
		_this.setProjection(_this.options_.projection); // any time the video element is recycled for ads
		// we have to reset the vr state and re-init after ad
  
  
		_this.on(player, 'adstart', function () {
		  return player.setTimeout(function () {
			// if the video element was recycled for this ad
			if (!player.ads || !player.ads.videoElementRecycled()) {
			  _this.log('video element not recycled for this ad, no need to reset');
  
			  return;
			}
  
			_this.log('video element recycled for this ad, reseting');
  
			_this.reset();
  
			_this.one(player, 'playing', _this.init);
		  });
		}, 1);
  
		_this.on(player, 'loadedmetadata', _this.init);
  
		return _this;
	  }
  
	  var _proto = VR.prototype;
  
	  _proto.changeProjection_ = function changeProjection_(projection) {
		var _this2 = this;
  
		projection = getInternalProjectionName(projection); // don't change to an invalid projection
  
		if (!projection) {
		  projection = 'NONE';
		}
  
		var position = {
		  x: 0,
		  y: 0,
		  z: 0
		};
  
		if (this.scene) {
		  this.scene.remove(this.movieScreen);
		}
  
		if (projection === 'AUTO') {
		  // mediainfo cannot be set to auto or we would infinite loop here
		  // each source should know whatever they are 360 or not, if using AUTO
		  if (this.player_.mediainfo && this.player_.mediainfo.projection && this.player_.mediainfo.projection !== 'AUTO') {
			var autoProjection = getInternalProjectionName(this.player_.mediainfo.projection);
			return this.changeProjection_(autoProjection);
		  }
  
		  return this.changeProjection_('NONE');
		} else if (projection === '360') {
		  this.movieGeometry = new SphereBufferGeometry(256, this.options_.sphereDetail, this.options_.sphereDetail);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true,
			side: BackSide
		  });
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial);
		  this.movieScreen.position.set(position.x, position.y, position.z);
		  this.movieScreen.scale.x = -1;
		  this.movieScreen.quaternion.setFromAxisAngle({
			x: 0,
			y: 1,
			z: 0
		  }, -Math.PI / 2);
		  this.scene.add(this.movieScreen);
		} else if (projection === '360_LR' || projection === '360_TB') {
		  // Left eye view
		  var geometry = new SphereGeometry(256, this.options_.sphereDetail, this.options_.sphereDetail);
		  var uvs = geometry.faceVertexUvs[0];
  
		  for (var i = 0; i < uvs.length; i++) {
			for (var j = 0; j < 3; j++) {
			  if (projection === '360_LR') {
				uvs[i][j].x *= 0.5;
			  } else {
				uvs[i][j].y *= 0.5;
				uvs[i][j].y += 0.5;
			  }
			}
		  }
  
		  this.movieGeometry = new BufferGeometry().fromGeometry(geometry);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true,
			side: BackSide
		  });
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial);
		  this.movieScreen.scale.x = -1;
		  this.movieScreen.quaternion.setFromAxisAngle({
			x: 0,
			y: 1,
			z: 0
		  }, -Math.PI / 2); // display in left eye only
  
		  this.movieScreen.layers.set(1);
		  this.scene.add(this.movieScreen); // Right eye view
  
		  geometry = new SphereGeometry(256, this.options_.sphereDetail, this.options_.sphereDetail);
		  uvs = geometry.faceVertexUvs[0];
  
		  for (var _i = 0; _i < uvs.length; _i++) {
			for (var _j = 0; _j < 3; _j++) {
			  if (projection === '360_LR') {
				uvs[_i][_j].x *= 0.5;
				uvs[_i][_j].x += 0.5;
			  } else {
				uvs[_i][_j].y *= 0.5;
			  }
			}
		  }
  
		  this.movieGeometry = new BufferGeometry().fromGeometry(geometry);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true,
			side: BackSide
		  });
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial);
		  this.movieScreen.scale.x = -1;
		  this.movieScreen.quaternion.setFromAxisAngle({
			x: 0,
			y: 1,
			z: 0
		  }, -Math.PI / 2); // display in right eye only
  
		  this.movieScreen.layers.set(2);
		  this.scene.add(this.movieScreen);
		} else if (projection === '360_CUBE') {
		  this.movieGeometry = new BoxGeometry(256, 256, 256);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true,
			side: BackSide
		  });
		  var left = [new Vector2(0, 0.5), new Vector2(0.333, 0.5), new Vector2(0.333, 1), new Vector2(0, 1)];
		  var right = [new Vector2(0.333, 0.5), new Vector2(0.666, 0.5), new Vector2(0.666, 1), new Vector2(0.333, 1)];
		  var top = [new Vector2(0.666, 0.5), new Vector2(1, 0.5), new Vector2(1, 1), new Vector2(0.666, 1)];
		  var bottom = [new Vector2(0, 0), new Vector2(0.333, 0), new Vector2(0.333, 0.5), new Vector2(0, 0.5)];
		  var front = [new Vector2(0.333, 0), new Vector2(0.666, 0), new Vector2(0.666, 0.5), new Vector2(0.333, 0.5)];
		  var back = [new Vector2(0.666, 0), new Vector2(1, 0), new Vector2(1, 0.5), new Vector2(0.666, 0.5)];
		  this.movieGeometry.faceVertexUvs[0] = [];
		  this.movieGeometry.faceVertexUvs[0][0] = [right[2], right[1], right[3]];
		  this.movieGeometry.faceVertexUvs[0][1] = [right[1], right[0], right[3]];
		  this.movieGeometry.faceVertexUvs[0][2] = [left[2], left[1], left[3]];
		  this.movieGeometry.faceVertexUvs[0][3] = [left[1], left[0], left[3]];
		  this.movieGeometry.faceVertexUvs[0][4] = [top[2], top[1], top[3]];
		  this.movieGeometry.faceVertexUvs[0][5] = [top[1], top[0], top[3]];
		  this.movieGeometry.faceVertexUvs[0][6] = [bottom[2], bottom[1], bottom[3]];
		  this.movieGeometry.faceVertexUvs[0][7] = [bottom[1], bottom[0], bottom[3]];
		  this.movieGeometry.faceVertexUvs[0][8] = [front[2], front[1], front[3]];
		  this.movieGeometry.faceVertexUvs[0][9] = [front[1], front[0], front[3]];
		  this.movieGeometry.faceVertexUvs[0][10] = [back[2], back[1], back[3]];
		  this.movieGeometry.faceVertexUvs[0][11] = [back[1], back[0], back[3]];
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial);
		  this.movieScreen.position.set(position.x, position.y, position.z);
		  this.movieScreen.rotation.y = -Math.PI;
		  this.scene.add(this.movieScreen);
		} else if (projection === '180' || projection === '180_LR' || projection === '180_MONO') {
		  var _geometry = new SphereGeometry(256, this.options_.sphereDetail, this.options_.sphereDetail, Math.PI, Math.PI); // Left eye view
  
  
		  _geometry.scale(-1, 1, 1);
  
		  var _uvs = _geometry.faceVertexUvs[0];
  
		  if (projection !== '180_MONO') {
			for (var _i2 = 0; _i2 < _uvs.length; _i2++) {
			  for (var _j2 = 0; _j2 < 3; _j2++) {
				_uvs[_i2][_j2].x *= 0.5;
			  }
			}
		  }
  
		  this.movieGeometry = new BufferGeometry().fromGeometry(_geometry);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true
		  });
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial); // display in left eye only
  
		  this.movieScreen.layers.set(1);
		  this.scene.add(this.movieScreen); // Right eye view
  
		  _geometry = new SphereGeometry(256, this.options_.sphereDetail, this.options_.sphereDetail, Math.PI, Math.PI);
  
		  _geometry.scale(-1, 1, 1);
  
		  _uvs = _geometry.faceVertexUvs[0];
  
		  for (var _i3 = 0; _i3 < _uvs.length; _i3++) {
			for (var _j3 = 0; _j3 < 3; _j3++) {
			  _uvs[_i3][_j3].x *= 0.5;
			  _uvs[_i3][_j3].x += 0.5;
			}
		  }
  
		  this.movieGeometry = new BufferGeometry().fromGeometry(_geometry);
		  this.movieMaterial = new MeshBasicMaterial({
			map: this.videoTexture,
			overdraw: true
		  });
		  this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial); // display in right eye only
  
		  this.movieScreen.layers.set(2);
		  this.scene.add(this.movieScreen);
		} else if (projection === 'EAC' || projection === 'EAC_LR') {
		  var makeScreen = function makeScreen(mapMatrix, scaleMatrix) {
			// "Continuity correction?": because of discontinuous faces and aliasing,
			// we truncate the 2-pixel-wide strips on all discontinuous edges,
			var contCorrect = 2;
			_this2.movieGeometry = new BoxGeometry(256, 256, 256);
			_this2.movieMaterial = new ShaderMaterial({
			  overdraw: true,
			  side: BackSide,
			  uniforms: {
				mapped: {
				  value: _this2.videoTexture
				},
				mapMatrix: {
				  value: mapMatrix
				},
				contCorrect: {
				  value: contCorrect
				},
				faceWH: {
				  value: new Vector2(1 / 3, 1 / 2).applyMatrix3(scaleMatrix)
				},
				vidWH: {
				  value: new Vector2(_this2.videoTexture.image.videoWidth, _this2.videoTexture.image.videoHeight).applyMatrix3(scaleMatrix)
				}
			  },
			  vertexShader: "\nvarying vec2 vUv;\nuniform mat3 mapMatrix;\n\nvoid main() {\n  vUv = (mapMatrix * vec3(uv, 1.)).xy;\n  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.);\n}",
			  fragmentShader: "\nvarying vec2 vUv;\nuniform sampler2D mapped;\nuniform vec2 faceWH;\nuniform vec2 vidWH;\nuniform float contCorrect;\n\nconst float PI = 3.1415926535897932384626433832795;\n\nvoid main() {\n  vec2 corner = vUv - mod(vUv, faceWH) + vec2(0, contCorrect / vidWH.y);\n\n  vec2 faceWHadj = faceWH - vec2(0, contCorrect * 2. / vidWH.y);\n\n  vec2 p = (vUv - corner) / faceWHadj - .5;\n  vec2 q = 2. / PI * atan(2. * p) + .5;\n\n  vec2 eUv = corner + q * faceWHadj;\n\n  gl_FragColor = texture2D(mapped, eUv);\n}"
			});
			var right = [new Vector2(0, 1 / 2), new Vector2(1 / 3, 1 / 2), new Vector2(1 / 3, 1), new Vector2(0, 1)];
			var front = [new Vector2(1 / 3, 1 / 2), new Vector2(2 / 3, 1 / 2), new Vector2(2 / 3, 1), new Vector2(1 / 3, 1)];
			var left = [new Vector2(2 / 3, 1 / 2), new Vector2(1, 1 / 2), new Vector2(1, 1), new Vector2(2 / 3, 1)];
			var bottom = [new Vector2(1 / 3, 0), new Vector2(1 / 3, 1 / 2), new Vector2(0, 1 / 2), new Vector2(0, 0)];
			var back = [new Vector2(1 / 3, 1 / 2), new Vector2(1 / 3, 0), new Vector2(2 / 3, 0), new Vector2(2 / 3, 1 / 2)];
			var top = [new Vector2(1, 0), new Vector2(1, 1 / 2), new Vector2(2 / 3, 1 / 2), new Vector2(2 / 3, 0)];
  
			for (var _i4 = 0, _arr = [right, front, left, bottom, back, top]; _i4 < _arr.length; _i4++) {
			  var face = _arr[_i4];
			  var height = _this2.videoTexture.image.videoHeight;
			  var lowY = 1;
			  var highY = 0;
  
			  for (var _iterator = face, _isArray = Array.isArray(_iterator), _i5 = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
				var _ref;
  
				if (_isArray) {
				  if (_i5 >= _iterator.length) break;
				  _ref = _iterator[_i5++];
				} else {
				  _i5 = _iterator.next();
				  if (_i5.done) break;
				  _ref = _i5.value;
				}
  
				var vector = _ref;
  
				if (vector.y < lowY) {
				  lowY = vector.y;
				}
  
				if (vector.y > highY) {
				  highY = vector.y;
				}
			  }
  
			  for (var _iterator2 = face, _isArray2 = Array.isArray(_iterator2), _i6 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
				var _ref2;
  
				if (_isArray2) {
				  if (_i6 >= _iterator2.length) break;
				  _ref2 = _iterator2[_i6++];
				} else {
				  _i6 = _iterator2.next();
				  if (_i6.done) break;
				  _ref2 = _i6.value;
				}
  
				var _vector = _ref2;
  
				if (Math.abs(_vector.y - lowY) < Number.EPSILON) {
				  _vector.y += contCorrect / height;
				}
  
				if (Math.abs(_vector.y - highY) < Number.EPSILON) {
				  _vector.y -= contCorrect / height;
				}
  
				_vector.x = _vector.x / height * (height - contCorrect * 2) + contCorrect / height;
			  }
			}
  
			_this2.movieGeometry.faceVertexUvs[0] = [];
			_this2.movieGeometry.faceVertexUvs[0][0] = [right[2], right[1], right[3]];
			_this2.movieGeometry.faceVertexUvs[0][1] = [right[1], right[0], right[3]];
			_this2.movieGeometry.faceVertexUvs[0][2] = [left[2], left[1], left[3]];
			_this2.movieGeometry.faceVertexUvs[0][3] = [left[1], left[0], left[3]];
			_this2.movieGeometry.faceVertexUvs[0][4] = [top[2], top[1], top[3]];
			_this2.movieGeometry.faceVertexUvs[0][5] = [top[1], top[0], top[3]];
			_this2.movieGeometry.faceVertexUvs[0][6] = [bottom[2], bottom[1], bottom[3]];
			_this2.movieGeometry.faceVertexUvs[0][7] = [bottom[1], bottom[0], bottom[3]];
			_this2.movieGeometry.faceVertexUvs[0][8] = [front[2], front[1], front[3]];
			_this2.movieGeometry.faceVertexUvs[0][9] = [front[1], front[0], front[3]];
			_this2.movieGeometry.faceVertexUvs[0][10] = [back[2], back[1], back[3]];
			_this2.movieGeometry.faceVertexUvs[0][11] = [back[1], back[0], back[3]];
			_this2.movieScreen = new Mesh(_this2.movieGeometry, _this2.movieMaterial);
  
			_this2.movieScreen.position.set(position.x, position.y, position.z);
  
			_this2.movieScreen.rotation.y = -Math.PI;
			return _this2.movieScreen;
		  };
  
		  if (projection === 'EAC') {
			this.scene.add(makeScreen(new Matrix3(), new Matrix3()));
		  } else {
			var scaleMatrix = new Matrix3().set(0, 0.5, 0, 1, 0, 0, 0, 0, 1);
			makeScreen(new Matrix3().set(0, -0.5, 0.5, 1, 0, 0, 0, 0, 1), scaleMatrix); // display in left eye only
  
			this.movieScreen.layers.set(1);
			this.scene.add(this.movieScreen);
			makeScreen(new Matrix3().set(0, -0.5, 1, 1, 0, 0, 0, 0, 1), scaleMatrix); // display in right eye only
  
			this.movieScreen.layers.set(2);
			this.scene.add(this.movieScreen);
		  }
		}
  
		this.currentProjection_ = projection;
	  };
  
	  _proto.triggerError_ = function triggerError_(errorObj) {
		// if we have videojs-errors use it
		if (this.videojsErrorsSupport_) {
		  this.player_.error(errorObj); // if we don't have videojs-errors just use a normal player error
		} else {
		  // strip any html content from the error message
		  // as it is not supported outside of videojs-errors
		  var div = document$1.createElement('div');
		  div.innerHTML = errors[errorObj.code].message;
		  var message = div.textContent || div.innerText || '';
		  this.player_.error({
			code: errorObj.code,
			message: message
		  });
		}
	  };
  
	  _proto.log = function log() {
		if (!this.options_.debug) {
		  return;
		}
  
		for (var _len = arguments.length, msgs = new Array(_len), _key = 0; _key < _len; _key++) {
		  msgs[_key] = arguments[_key];
		}
  
		msgs.forEach(function (msg) {
		  videojs.log('VR: ', msg);
		});
	  };
  
	  _proto.handleVrDisplayActivate_ = function handleVrDisplayActivate_() {
		var _this3 = this;
  
		if (!this.vrDisplay) {
		  return;
		}
  
		this.vrDisplay.requestPresent([{
		  source: this.renderedCanvas
		}]).then(function () {
		  if (!_this3.vrDisplay.cardboardUI_ || !videojs.browser.IS_IOS) {
			return;
		  } // webvr-polyfill/cardboard ui only watches for click events
		  // to tell that the back arrow button is pressed during cardboard vr.
		  // but somewhere along the line these events are silenced with preventDefault
		  // but only on iOS, so we translate them ourselves here
  
  
		  var touches = [];
  
		  var iosCardboardTouchStart_ = function iosCardboardTouchStart_(e) {
			for (var i = 0; i < e.touches.length; i++) {
			  touches.push(e.touches[i]);
			}
		  };
  
		  var iosCardboardTouchEnd_ = function iosCardboardTouchEnd_(e) {
			if (!touches.length) {
			  return;
			}
  
			touches.forEach(function (t) {
			  var simulatedClick = new window$1.MouseEvent('click', {
				screenX: t.screenX,
				screenY: t.screenY,
				clientX: t.clientX,
				clientY: t.clientY
			  });
  
			  _this3.renderedCanvas.dispatchEvent(simulatedClick);
			});
			touches = [];
		  };
  
		  _this3.renderedCanvas.addEventListener('touchstart', iosCardboardTouchStart_);
  
		  _this3.renderedCanvas.addEventListener('touchend', iosCardboardTouchEnd_);
  
		  _this3.iosRevertTouchToClick_ = function () {
			_this3.renderedCanvas.removeEventListener('touchstart', iosCardboardTouchStart_);
  
			_this3.renderedCanvas.removeEventListener('touchend', iosCardboardTouchEnd_);
  
			_this3.iosRevertTouchToClick_ = null;
		  };
		});
	  };
  
	  _proto.handleVrDisplayDeactivate_ = function handleVrDisplayDeactivate_() {
		if (!this.vrDisplay || !this.vrDisplay.isPresenting) {
		  return;
		}
  
		if (this.iosRevertTouchToClick_) {
		  this.iosRevertTouchToClick_();
		}
  
		this.vrDisplay.exitPresent();
	  };
  
	  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {
		if (this.vrDisplay) {
		  return this.vrDisplay.requestAnimationFrame(fn);
		}
  
		return this.player_.requestAnimationFrame(fn);
	  };
  
	  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {
		if (this.vrDisplay) {
		  return this.vrDisplay.cancelAnimationFrame(id);
		}
  
		return this.player_.cancelAnimationFrame(id);
	  };
  
	  _proto.togglePlay_ = function togglePlay_() {
		if (this.player_.paused()) {
		  this.player_.play();
		} else {
		  this.player_.pause();
		}
	  };
  
	  _proto.animate_ = function animate_() {
		if (!this.initialized_) {
		  return;
		}
  
		if (this.getVideoEl_().readyState === this.getVideoEl_().HAVE_ENOUGH_DATA) {
		  if (this.videoTexture) {
			this.videoTexture.needsUpdate = true;
		  }
		}
  
		this.controls3d.update();
  
		if (this.omniController) {
		  this.omniController.update(this.camera);
		}
  
		this.effect.render(this.scene, this.camera);
  
		if (window$1.navigator.getGamepads) {
		  // Grab all gamepads
		  var gamepads = window$1.navigator.getGamepads();
  
		  for (var i = 0; i < gamepads.length; ++i) {
			var gamepad = gamepads[i]; // Make sure gamepad is defined
			// Only take input if state has changed since we checked last
  
			if (!gamepad || !gamepad.timestamp || gamepad.timestamp === this.prevTimestamps_[i]) {
			  continue;
			}
  
			for (var j = 0; j < gamepad.buttons.length; ++j) {
			  if (gamepad.buttons[j].pressed) {
				this.togglePlay_();
				this.prevTimestamps_[i] = gamepad.timestamp;
				break;
			  }
			}
		  }
		}
  
		this.camera.getWorldDirection(this.cameraVector);
		this.animationFrameId_ = this.requestAnimationFrame(this.animate_);
	  };
  
	  _proto.handleResize_ = function handleResize_() {
		var width = this.player_.currentWidth();
		var height = this.player_.currentHeight();
		this.effect.setSize(width, height, false);
		this.camera.aspect = width / height;
		this.camera.updateProjectionMatrix();
	  };
  
	  _proto.setProjection = function setProjection(projection) {
		if (!getInternalProjectionName(projection)) {
		  videojs.log.error('videojs-vr: please pass a valid projection ' + validProjections.join(', '));
		  return;
		}
  
		this.currentProjection_ = projection;
		this.defaultProjection_ = projection;
	  };
  
	  _proto.init = function init() {
		var _this4 = this;
  
		this.reset();
		this.camera = new PerspectiveCamera(75, this.player_.currentWidth() / this.player_.currentHeight(), 1, 1000); // Store vector representing the direction in which the camera is looking, in world space.
  
		this.cameraVector = new Vector3();
  
		if (this.currentProjection_ === '360_LR' || this.currentProjection_ === '360_TB' || this.currentProjection_ === '180' || this.currentProjection_ === '180_LR' || this.currentProjection_ === '180_MONO' || this.currentProjection_ === 'EAC_LR') {
		  // Render left eye when not in VR mode
		  this.camera.layers.enable(1);
		}
  
		this.scene = new Scene();
		this.videoTexture = new VideoTexture(this.getVideoEl_()); // shared regardless of wether VideoTexture is used or
		// an image canvas is used
  
		this.videoTexture.generateMipmaps = false;
		this.videoTexture.minFilter = LinearFilter;
		this.videoTexture.magFilter = LinearFilter;
		this.videoTexture.format = RGBFormat;
		this.changeProjection_(this.currentProjection_);
  
		if (this.currentProjection_ === 'NONE') {
		  this.log('Projection is NONE, dont init');
		  this.reset();
		  return;
		}
  
		this.player_.removeChild('BigPlayButton');
		this.player_.addChild('BigVrPlayButton', {}, this.bigPlayButtonIndex_);
		this.player_.bigPlayButton = this.player_.getChild('BigVrPlayButton'); // mobile devices, or cardboard forced to on
  
		if (this.options_.forceCardboard || videojs.browser.IS_ANDROID || videojs.browser.IS_IOS) {
		  this.addCardboardButton_();
		} // if ios remove full screen toggle
  
  
		if (videojs.browser.IS_IOS && this.player_.controlBar && this.player_.controlBar.fullscreenToggle) {
		  this.player_.controlBar.fullscreenToggle.hide();
		}
  
		this.camera.position.set(0, 0, 0);
		this.renderer = new WebGLRenderer({
		  devicePixelRatio: window$1.devicePixelRatio,
		  alpha: false,
		  clearColor: 0xffffff,
		  antialias: true
		});
		var webglContext = this.renderer.getContext('webgl');
		var oldTexImage2D = webglContext.texImage2D;
		/* this is a workaround since threejs uses try catch */
  
		webglContext.texImage2D = function () {
		  try {
			for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
			  args[_key2] = arguments[_key2];
			}
  
			return oldTexImage2D.apply(webglContext, args);
		  } catch (e) {
			_this4.reset();
  
			_this4.player_.pause();
  
			_this4.triggerError_({
			  code: 'web-vr-hls-cors-not-supported',
			  dismiss: false
			});
  
			throw new Error(e);
		  }
		};
  
		this.renderer.setSize(this.player_.currentWidth(), this.player_.currentHeight(), false);
		this.effect = new VREffect(this.renderer);
		this.effect.setSize(this.player_.currentWidth(), this.player_.currentHeight(), false);
		this.vrDisplay = null; // Previous timestamps for gamepad updates
  
		this.prevTimestamps_ = [];
		this.renderedCanvas = this.renderer.domElement;
		this.renderedCanvas.setAttribute('style', 'width: 100%; height: 100%; position: absolute; top:0;');
		var videoElStyle = this.getVideoEl_().style;
		this.player_.el().insertBefore(this.renderedCanvas, this.player_.el().firstChild);
		videoElStyle.zIndex = '-1';
		videoElStyle.opacity = '0';
  
		if (window$1.navigator.getVRDisplays) {
		  this.log('is supported, getting vr displays');
		  window$1.navigator.getVRDisplays().then(function (displays) {
			if (displays.length > 0) {
			  _this4.log('Displays found', displays);
  
			  _this4.vrDisplay = displays[0]; // Native WebVR Head Mounted Displays (HMDs) like the HTC Vive
			  // also need the cardboard button to enter fully immersive mode
			  // so, we want to add the button if we're not polyfilled.
  
			  if (!_this4.vrDisplay.isPolyfilled) {
				_this4.log('Real HMD found using VRControls', _this4.vrDisplay);
  
				_this4.addCardboardButton_(); // We use VRControls here since we are working with an HMD
				// and we only want orientation controls.
  
  
				_this4.controls3d = new VRControls(_this4.camera);
			  }
			}
  
			if (!_this4.controls3d) {
			  _this4.log('no HMD found Using Orbit & Orientation Controls');
  
			  var options = {
				camera: _this4.camera,
				canvas: _this4.renderedCanvas,
				// check if its a half sphere view projection
				halfView: _this4.currentProjection_.indexOf('180') === 0,
				orientation: videojs.browser.IS_IOS || videojs.browser.IS_ANDROID || false
			  };
  
			  if (_this4.options_.motionControls === false) {
				options.orientation = false;
			  }
  
			  _this4.controls3d = new OrbitOrientationControls(options);
			  _this4.canvasPlayerControls = new CanvasPlayerControls(_this4.player_, _this4.renderedCanvas);
			}
  
			_this4.animationFrameId_ = _this4.requestAnimationFrame(_this4.animate_);
		  });
		} else if (window$1.navigator.getVRDevices) {
		  this.triggerError_({
			code: 'web-vr-out-of-date',
			dismiss: false
		  });
		} else {
		  this.triggerError_({
			code: 'web-vr-not-supported',
			dismiss: false
		  });
		}
  
		if (this.options_.omnitone) {
		  var audiocontext = AudioContext.getContext();
		  this.omniController = new OmnitoneController(audiocontext, this.options_.omnitone, this.getVideoEl_(), this.options_.omnitoneOptions);
		  this.omniController.one('audiocontext-suspended', function () {
			_this4.player.pause();
  
			_this4.player.one('playing', function () {
			  audiocontext.resume();
			});
		  });
		}
  
		this.on(this.player_, 'fullscreenchange', this.handleResize_);
		window$1.addEventListener('vrdisplaypresentchange', this.handleResize_, true);
		window$1.addEventListener('resize', this.handleResize_, true);
		window$1.addEventListener('vrdisplayactivate', this.handleVrDisplayActivate_, true);
		window$1.addEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_, true);
		this.initialized_ = true;
		this.trigger('initialized');
	  };
  
	  _proto.addCardboardButton_ = function addCardboardButton_() {
		if (!this.player_.controlBar.getChild('CardboardButton')) {
		  this.player_.controlBar.addChild('CardboardButton', {});
		}
	  };
  
	  _proto.getVideoEl_ = function getVideoEl_() {
		return this.player_.el().getElementsByTagName('video')[0];
	  };
  
	  _proto.reset = function reset() {
		if (!this.initialized_) {
		  return;
		}
  
		if (this.omniController) {
		  this.omniController.off('audiocontext-suspended');
		  this.omniController.dispose();
		  this.omniController = undefined;
		}
  
		if (this.controls3d) {
		  this.controls3d.dispose();
		  this.controls3d = null;
		}
  
		if (this.canvasPlayerControls) {
		  this.canvasPlayerControls.dispose();
		  this.canvasPlayerControls = null;
		}
  
		if (this.effect) {
		  this.effect.dispose();
		  this.effect = null;
		}
  
		window$1.removeEventListener('resize', this.handleResize_, true);
		window$1.removeEventListener('vrdisplaypresentchange', this.handleResize_, true);
		window$1.removeEventListener('vrdisplayactivate', this.handleVrDisplayActivate_, true);
		window$1.removeEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_, true); // re-add the big play button to player
  
		if (!this.player_.getChild('BigPlayButton')) {
		  this.player_.addChild('BigPlayButton', {}, this.bigPlayButtonIndex_);
		}
  
		if (this.player_.getChild('BigVrPlayButton')) {
		  this.player_.removeChild('BigVrPlayButton');
		} // remove the cardboard button
  
  
		if (this.player_.getChild('CardboardButton')) {
		  this.player_.controlBar.removeChild('CardboardButton');
		} // show the fullscreen again
  
  
		if (videojs.browser.IS_IOS && this.player_.controlBar && this.player_.controlBar.fullscreenToggle) {
		  this.player_.controlBar.fullscreenToggle.show();
		} // reset the video element style so that it will be displayed
  
  
		var videoElStyle = this.getVideoEl_().style;
		videoElStyle.zIndex = '';
		videoElStyle.opacity = ''; // set the current projection to the default
  
		this.currentProjection_ = this.defaultProjection_; // reset the ios touch to click workaround
  
		if (this.iosRevertTouchToClick_) {
		  this.iosRevertTouchToClick_();
		} // remove the old canvas
  
  
		if (this.renderedCanvas) {
		  this.renderedCanvas.parentNode.removeChild(this.renderedCanvas);
		}
  
		if (this.animationFrameId_) {
		  this.cancelAnimationFrame(this.animationFrameId_);
		}
  
		this.initialized_ = false;
	  };
  
	  _proto.dispose = function dispose() {
		_Plugin.prototype.dispose.call(this);
  
		this.reset();
	  };
  
	  _proto.polyfillVersion = function polyfillVersion() {
		return WebVRPolyfill.version;
	  };
  
	  return VR;
	}(Plugin);
  
	VR.prototype.setTimeout = Component.prototype.setTimeout;
	VR.prototype.clearTimeout = Component.prototype.clearTimeout;
	VR.VERSION = version;
	videojs.registerPlugin('vr', VR);
  
	return VR;
  
  })));
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/admin/lib/pannellum/src/js/videojs-pannellum-plugin.js?ver=1 
/*
 * Video.js plugin for Pannellum
 * Copyright (c) 2015-2018 Matthew Petroff
 * MIT License
 */

(function(document, videojs, pannellum) {
'use strict';

var registerPlugin = videojs.registerPlugin || videojs.plugin;  // Use registerPlugin for Video.js >= 6
registerPlugin('pannellum', function(config) {
    // Create Pannellum instance
    var player = this;
    var container = player.el();
    var vid = container.getElementsByTagName('video')[0],
        pnlmContainer = document.createElement('div');
    pnlmContainer.style.zIndex = '0';
    config = config || {};
    config.type = 'equirectangular';
    config.dynamic = true;
    config.showZoomCtrl = false;
    config.showFullscreenCtrl = false;
    config.autoLoad = true;
    config.panorama = vid;
    pnlmContainer.style.visibility = 'hidden';
    player.pnlmViewer = pannellum.viewer(pnlmContainer, config);
    container.insertBefore(pnlmContainer, container.firstChild);
    vid.style.display = 'none';

    // Handle update settings
    player.on('play', function() {
        if (vid.readyState > 1)
            player.pnlmViewer.setUpdate(true);
    });
    player.on('canplay', function() {
        if (!player.paused())
            player.pnlmViewer.setUpdate(true);
    });
    player.on('pause', function() {
        player.pnlmViewer.setUpdate(false);
    });
    player.on('loadeddata', function() {
        pnlmContainer.style.visibility = 'visible';
    });
    player.on('seeking', function() {
        if (player.paused())
            player.pnlmViewer.setUpdate(true);
    });
    player.on('seeked', function() {
        if (player.paused())
            player.pnlmViewer.setUpdate(false);
    });
});

})(document, videojs, pannellum);
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/admin/js/owl.carousel.js?ver=6.9.4 
/**
 * Owl carousel
 * @version 2.3.4
 * @author Bartosz Wojciechowski
 * @author David Deutsch
 * @license The MIT License (MIT)
 * @todo Lazy Load Icon
 * @todo prevent animationend bubling
 * @todo itemsScaleUp
 * @todo Test Zepto
 * @todo stagePadding calculate wrong active classes
 */
;(function($, window, document, undefined) {

	/**
	 * Creates a carousel.
	 * @class The Owl Carousel.
	 * @public
	 * @param {HTMLElement|jQuery} element - The element to create the carousel for.
	 * @param {Object} [options] - The options
	 */
	function Owl(element, options) {

		/**
		 * Current settings for the carousel.
		 * @public
		 */
		this.settings = null;

		/**
		 * Current options set by the caller including defaults.
		 * @public
		 */
		this.options = $.extend({}, Owl.Defaults, options);

		/**
		 * Plugin element.
		 * @public
		 */
		this.$element = $(element);

		/**
		 * Proxied event handlers.
		 * @protected
		 */
		this._handlers = {};

		/**
		 * References to the running plugins of this carousel.
		 * @protected
		 */
		this._plugins = {};

		/**
		 * Currently suppressed events to prevent them from being retriggered.
		 * @protected
		 */
		this._supress = {};

		/**
		 * Absolute current position.
		 * @protected
		 */
		this._current = null;

		/**
		 * Animation speed in milliseconds.
		 * @protected
		 */
		this._speed = null;

		/**
		 * Coordinates of all items in pixel.
		 * @todo The name of this member is missleading.
		 * @protected
		 */
		this._coordinates = [];

		/**
		 * Current breakpoint.
		 * @todo Real media queries would be nice.
		 * @protected
		 */
		this._breakpoint = null;

		/**
		 * Current width of the plugin element.
		 */
		this._width = null;

		/**
		 * All real items.
		 * @protected
		 */
		this._items = [];

		/**
		 * All cloned items.
		 * @protected
		 */
		this._clones = [];

		/**
		 * Merge values of all items.
		 * @todo Maybe this could be part of a plugin.
		 * @protected
		 */
		this._mergers = [];

		/**
		 * Widths of all items.
		 */
		this._widths = [];

		/**
		 * Invalidated parts within the update process.
		 * @protected
		 */
		this._invalidated = {};

		/**
		 * Ordered list of workers for the update process.
		 * @protected
		 */
		this._pipe = [];

		/**
		 * Current state information for the drag operation.
		 * @todo #261
		 * @protected
		 */
		this._drag = {
			time: null,
			target: null,
			pointer: null,
			stage: {
				start: null,
				current: null
			},
			direction: null
		};

		/**
		 * Current state information and their tags.
		 * @type {Object}
		 * @protected
		 */
		this._states = {
			current: {},
			tags: {
				'initializing': [ 'busy' ],
				'animating': [ 'busy' ],
				'dragging': [ 'interacting' ]
			}
		};

		$.each([ 'onResize', 'onThrottledResize' ], $.proxy(function(i, handler) {
			this._handlers[handler] = $.proxy(this[handler], this);
		}, this));

		$.each(Owl.Plugins, $.proxy(function(key, plugin) {
			this._plugins[key.charAt(0).toLowerCase() + key.slice(1)]
				= new plugin(this);
		}, this));

		$.each(Owl.Workers, $.proxy(function(priority, worker) {
			this._pipe.push({
				'filter': worker.filter,
				'run': $.proxy(worker.run, this)
			});
		}, this));

		this.setup();
		this.initialize();
	}

	/**
	 * Default options for the carousel.
	 * @public
	 */
	Owl.Defaults = {
		items: 3,
		loop: false,
		center: false,
		rewind: false,
		checkVisibility: true,

		mouseDrag: true,
		touchDrag: true,
		pullDrag: true,
		freeDrag: false,

		margin: 0,
		stagePadding: 0,

		merge: false,
		mergeFit: true,
		autoWidth: false,

		startPosition: 0,
		rtl: false,

		smartSpeed: 250,
		fluidSpeed: false,
		dragEndSpeed: false,

		responsive: {},
		responsiveRefreshRate: 200,
		responsiveBaseElement: window,

		fallbackEasing: 'swing',
		slideTransition: '',

		info: false,

		nestedItemSelector: false,
		itemElement: 'div',
		stageElement: 'div',

		refreshClass: 'owl-refresh',
		loadedClass: 'owl-loaded',
		loadingClass: 'owl-loading',
		rtlClass: 'owl-rtl',
		responsiveClass: 'owl-responsive',
		dragClass: 'owl-drag',
		itemClass: 'owl-item',
		stageClass: 'owl-stage',
		stageOuterClass: 'owl-stage-outer',
		grabClass: 'owl-grab'
	};

	/**
	 * Enumeration for width.
	 * @public
	 * @readonly
	 * @enum {String}
	 */
	Owl.Width = {
		Default: 'default',
		Inner: 'inner',
		Outer: 'outer'
	};

	/**
	 * Enumeration for types.
	 * @public
	 * @readonly
	 * @enum {String}
	 */
	Owl.Type = {
		Event: 'event',
		State: 'state'
	};

	/**
	 * Contains all registered plugins.
	 * @public
	 */
	Owl.Plugins = {};

	/**
	 * List of workers involved in the update process.
	 */
	Owl.Workers = [ {
		filter: [ 'width', 'settings' ],
		run: function() {
			this._width = this.$element.width();
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function(cache) {
			cache.current = this._items && this._items[this.relative(this._current)];
		}
	}, {
		filter: [ 'items', 'settings' ],
		run: function() {
			this.$stage.children('.cloned').remove();
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function(cache) {
			var margin = this.settings.margin || '',
				grid = !this.settings.autoWidth,
				rtl = this.settings.rtl,
				css = {
					'width': 'auto',
					'margin-left': rtl ? margin : '',
					'margin-right': rtl ? '' : margin
				};

			!grid && this.$stage.children().css(css);

			cache.css = css;
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function(cache) {
			var width = (this.width() / this.settings.items).toFixed(3) - this.settings.margin,
				merge = null,
				iterator = this._items.length,
				grid = !this.settings.autoWidth,
				widths = [];

			cache.items = {
				merge: false,
				width: width
			};

			while (iterator--) {
				merge = this._mergers[iterator];
				merge = this.settings.mergeFit && Math.min(merge, this.settings.items) || merge;

				cache.items.merge = merge > 1 || cache.items.merge;

				widths[iterator] = !grid ? this._items[iterator].width() : width * merge;
			}

			this._widths = widths;
		}
	}, {
		filter: [ 'items', 'settings' ],
		run: function() {
			var clones = [],
				items = this._items,
				settings = this.settings,
				// TODO: Should be computed from number of min width items in stage
				view = Math.max(settings.items * 2, 4),
				size = Math.ceil(items.length / 2) * 2,
				repeat = settings.loop && items.length ? settings.rewind ? view : Math.max(view, size) : 0,
				append = '',
				prepend = '';

			repeat /= 2;

			while (repeat > 0) {
				// Switch to only using appended clones
				clones.push(this.normalize(clones.length / 2, true));
				$(items[clones[clones.length - 1]][0]).clone(true).addClass('cloned').appendTo(this.$stage);
				clones.push(this.normalize(items.length - 1 - (clones.length - 1) / 2, true));
				$(items[clones[clones.length - 1]][0]).clone(true).addClass('cloned').prependTo(this.$stage);
				repeat -= 1;
			}
			this._clones = clones;
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function() {
			var rtl = this.settings.rtl ? 1 : -1,
				size = this._clones.length + this._items.length,
				iterator = -1,
				previous = 0,
				current = 0,
				coordinates = [];

			while (++iterator < size) {
				previous = coordinates[iterator - 1] || 0;
				current = this._widths[this.relative(iterator)] + this.settings.margin;
				coordinates.push(previous + current * rtl);
			}

			this._coordinates = coordinates;
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function() {
			var padding = this.settings.stagePadding,
				coordinates = this._coordinates,
				css = {
					'width': Math.ceil(Math.abs(coordinates[coordinates.length - 1])) + padding * 2,
					'padding-left': padding || '',
					'padding-right': padding || ''
				};

			this.$stage.css(css);
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function(cache) {
			var iterator = this._coordinates.length,
				grid = !this.settings.autoWidth,
				items = this.$stage.children();

			if (grid && cache.items.merge) {
				while (iterator--) {
					cache.css.width = this._widths[this.relative(iterator)];
					items.eq(iterator).css(cache.css);
				}
			} else if (grid) {
				cache.css.width = cache.items.width;
				items.css(cache.css);
			}
		}
	}, {
		filter: [ 'items' ],
		run: function() {
			this._coordinates.length < 1 && this.$stage.removeAttr('style');
		}
	}, {
		filter: [ 'width', 'items', 'settings' ],
		run: function(cache) {
			cache.current = cache.current ? this.$stage.children().index(cache.current) : 0;
			cache.current = Math.max(this.minimum(), Math.min(this.maximum(), cache.current));
			this.reset(cache.current);
		}
	}, {
		filter: [ 'position' ],
		run: function() {
			this.animate(this.coordinates(this._current));
		}
	}, {
		filter: [ 'width', 'position', 'items', 'settings' ],
		run: function() {
			var rtl = this.settings.rtl ? 1 : -1,
				padding = this.settings.stagePadding * 2,
				begin = this.coordinates(this.current()) + padding,
				end = begin + this.width() * rtl,
				inner, outer, matches = [], i, n;

			for (i = 0, n = this._coordinates.length; i < n; i++) {
				inner = this._coordinates[i - 1] || 0;
				outer = Math.abs(this._coordinates[i]) + padding * rtl;

				if ((this.op(inner, '<=', begin) && (this.op(inner, '>', end)))
					|| (this.op(outer, '<', begin) && this.op(outer, '>', end))) {
					matches.push(i);
				}
			}

			this.$stage.children('.active').removeClass('active');
			this.$stage.children(':eq(' + matches.join('), :eq(') + ')').addClass('active');

			this.$stage.children('.center').removeClass('center');
			if (this.settings.center) {
				this.$stage.children().eq(this.current()).addClass('center');
			}
		}
	} ];

	/**
	 * Create the stage DOM element
	 */
	Owl.prototype.initializeStage = function() {
		this.$stage = this.$element.find('.' + this.settings.stageClass);

		// if the stage is already in the DOM, grab it and skip stage initialization
		if (this.$stage.length) {
			return;
		}

		this.$element.addClass(this.options.loadingClass);

		// create stage
		this.$stage = $('<' + this.settings.stageElement + '>', {
			"class": this.settings.stageClass
		}).wrap( $( '<div/>', {
			"class": this.settings.stageOuterClass
		}));

		// append stage
		this.$element.append(this.$stage.parent());
	};

	/**
	 * Create item DOM elements
	 */
	Owl.prototype.initializeItems = function() {
		var $items = this.$element.find('.owl-item');

		// if the items are already in the DOM, grab them and skip item initialization
		if ($items.length) {
			this._items = $items.get().map(function(item) {
				return $(item);
			});

			this._mergers = this._items.map(function() {
				return 1;
			});

			this.refresh();

			return;
		}

		// append content
		this.replace(this.$element.children().not(this.$stage.parent()));

		// check visibility
		if (this.isVisible()) {
			// update view
			this.refresh();
		} else {
			// invalidate width
			this.invalidate('width');
		}

		this.$element
			.removeClass(this.options.loadingClass)
			.addClass(this.options.loadedClass);
	};

	/**
	 * Initializes the carousel.
	 * @protected
	 */
	Owl.prototype.initialize = function() {
		this.enter('initializing');
		this.trigger('initialize');

		this.$element.toggleClass(this.settings.rtlClass, this.settings.rtl);

		if (this.settings.autoWidth && !this.is('pre-loading')) {
			var imgs, nestedSelector, width;
			imgs = this.$element.find('img');
			nestedSelector = this.settings.nestedItemSelector ? '.' + this.settings.nestedItemSelector : undefined;
			width = this.$element.children(nestedSelector).width();

			if (imgs.length && width <= 0) {
				this.preloadAutoWidthImages(imgs);
			}
		}

		this.initializeStage();
		this.initializeItems();

		// register event handlers
		this.registerEventHandlers();

		this.leave('initializing');
		this.trigger('initialized');
	};

	/**
	 * @returns {Boolean} visibility of $element
	 *                    if you know the carousel will always be visible you can set `checkVisibility` to `false` to
	 *                    prevent the expensive browser layout forced reflow the $element.is(':visible') does
	 */
	Owl.prototype.isVisible = function() {
		return this.settings.checkVisibility
			? this.$element.is(':visible')
			: true;
	};

	/**
	 * Setups the current settings.
	 * @todo Remove responsive classes. Why should adaptive designs be brought into IE8?
	 * @todo Support for media queries by using `matchMedia` would be nice.
	 * @public
	 */
	Owl.prototype.setup = function() {
		var viewport = this.viewport(),
			overwrites = this.options.responsive,
			match = -1,
			settings = null;

		if (!overwrites) {
			settings = $.extend({}, this.options);
		} else {
			$.each(overwrites, function(breakpoint) {
				if (breakpoint <= viewport && breakpoint > match) {
					match = Number(breakpoint);
				}
			});

			settings = $.extend({}, this.options, overwrites[match]);
			if (typeof settings.stagePadding === 'function') {
				settings.stagePadding = settings.stagePadding();
			}
			delete settings.responsive;

			// responsive class
			if (settings.responsiveClass) {
				this.$element.attr('class',
					this.$element.attr('class').replace(new RegExp('(' + this.options.responsiveClass + '-)\\S+\\s', 'g'), '$1' + match)
				);
			}
		}

		this.trigger('change', { property: { name: 'settings', value: settings } });
		this._breakpoint = match;
		this.settings = settings;
		this.invalidate('settings');
		this.trigger('changed', { property: { name: 'settings', value: this.settings } });
	};

	/**
	 * Updates option logic if necessery.
	 * @protected
	 */
	Owl.prototype.optionsLogic = function() {
		if (this.settings.autoWidth) {
			this.settings.stagePadding = false;
			this.settings.merge = false;
		}
	};

	/**
	 * Prepares an item before add.
	 * @todo Rename event parameter `content` to `item`.
	 * @protected
	 * @returns {jQuery|HTMLElement} - The item container.
	 */
	Owl.prototype.prepare = function(item) {
		var event = this.trigger('prepare', { content: item });

		if (!event.data) {
			event.data = $('<' + this.settings.itemElement + '/>')
				.addClass(this.options.itemClass).append(item)
		}

		this.trigger('prepared', { content: event.data });

		return event.data;
	};

	/**
	 * Updates the view.
	 * @public
	 */
	Owl.prototype.update = function() {
		var i = 0,
			n = this._pipe.length,
			filter = $.proxy(function(p) { return this[p] }, this._invalidated),
			cache = {};

		while (i < n) {
			if (this._invalidated.all || $.grep(this._pipe[i].filter, filter).length > 0) {
				this._pipe[i].run(cache);
			}
			i++;
		}

		this._invalidated = {};

		!this.is('valid') && this.enter('valid');
	};

	/**
	 * Gets the width of the view.
	 * @public
	 * @param {Owl.Width} [dimension=Owl.Width.Default] - The dimension to return.
	 * @returns {Number} - The width of the view in pixel.
	 */
	Owl.prototype.width = function(dimension) {
		dimension = dimension || Owl.Width.Default;
		switch (dimension) {
			case Owl.Width.Inner:
			case Owl.Width.Outer:
				return this._width;
			default:
				return this._width - this.settings.stagePadding * 2 + this.settings.margin;
		}
	};

	/**
	 * Refreshes the carousel primarily for adaptive purposes.
	 * @public
	 */
	Owl.prototype.refresh = function(resizing) {
		resizing = resizing || false;

		this.enter('refreshing');
		this.trigger('refresh');

		this.setup();

		this.optionsLogic();

		this.$element.addClass(this.options.refreshClass);

		this.update();

		if (!resizing) {
			this.onResize();
		}

		this.$element.removeClass(this.options.refreshClass);

		this.leave('refreshing');
		this.trigger('refreshed');
	};

	/**
	 * Checks window `resize` event.
	 * @protected
	 */
	Owl.prototype.onThrottledResize = function() {
		window.clearTimeout(this.resizeTimer);
		this.resizeTimer = window.setTimeout(this._handlers.onResize, this.settings.responsiveRefreshRate);
	};

	/**
	 * Checks window `resize` event.
	 * @protected
	 */
	Owl.prototype.onResize = function() {
		var resizing = true;

		if (!this._items.length) {
			return false;
		}

		if (this._width === this.$element.width()) {
			return false;
		}

		if (!this.isVisible()) {
			return false;
		}

		this.enter('resizing');

		if (this.trigger('resize').isDefaultPrevented()) {
			this.leave('resizing');
			return false;
		}

		this.invalidate('width');

		this.refresh(resizing);

		this.leave('resizing');
		this.trigger('resized');
	};

	/**
	 * Registers event handlers.
	 * @todo Check `msPointerEnabled`
	 * @todo #261
	 * @protected
	 */
	Owl.prototype.registerEventHandlers = function() {
		if ($.support.transition) {
			this.$stage.on($.support.transition.end + '.owl.core', $.proxy(this.onTransitionEnd, this));
		}

		if (this.settings.responsive !== false) {
			this.on(window, 'resize', this._handlers.onThrottledResize);
		}

		if (this.settings.mouseDrag) {
			this.$element.addClass(this.options.dragClass);
			this.$stage.on('mousedown.owl.core', $.proxy(this.onDragStart, this));
			this.$stage.on('dragstart.owl.core selectstart.owl.core', function() { return false });
		}

		if (this.settings.touchDrag){
			this.$stage.on('touchstart.owl.core', $.proxy(this.onDragStart, this));
			this.$stage.on('touchcancel.owl.core', $.proxy(this.onDragEnd, this));
		}
	};

	/**
	 * Handles `touchstart` and `mousedown` events.
	 * @todo Horizontal swipe threshold as option
	 * @todo #261
	 * @protected
	 * @param {Event} event - The event arguments.
	 */
	Owl.prototype.onDragStart = function(event) {
		var stage = null;

		if (event.which === 3) {
			return;
		}

		if ($.support.transform) {
			stage = this.$stage.css('transform').replace(/.*\(|\)| /g, '').split(',');
			stage = {
				x: stage[stage.length === 16 ? 12 : 4],
				y: stage[stage.length === 16 ? 13 : 5]
			};
		} else {
			stage = this.$stage.position();
			stage = {
				x: this.settings.rtl ?
					stage.left + this.$stage.width() - this.width() + this.settings.margin :
					stage.left,
				y: stage.top
			};
		}

		if (this.is('animating')) {
			$.support.transform ? this.animate(stage.x) : this.$stage.stop()
			this.invalidate('position');
		}

		this.$element.toggleClass(this.options.grabClass, event.type === 'mousedown');

		this.speed(0);

		this._drag.time = new Date().getTime();
		this._drag.target = $(event.target);
		this._drag.stage.start = stage;
		this._drag.stage.current = stage;
		this._drag.pointer = this.pointer(event);

		$(document).on('mouseup.owl.core touchend.owl.core', $.proxy(this.onDragEnd, this));

		$(document).one('mousemove.owl.core touchmove.owl.core', $.proxy(function(event) {
			var delta = this.difference(this._drag.pointer, this.pointer(event));

			$(document).on('mousemove.owl.core touchmove.owl.core', $.proxy(this.onDragMove, this));

			if (Math.abs(delta.x) < Math.abs(delta.y) && this.is('valid')) {
				return;
			}

			event.preventDefault();

			this.enter('dragging');
			this.trigger('drag');
		}, this));
	};

	/**
	 * Handles the `touchmove` and `mousemove` events.
	 * @todo #261
	 * @protected
	 * @param {Event} event - The event arguments.
	 */
	Owl.prototype.onDragMove = function(event) {
		var minimum = null,
			maximum = null,
			pull = null,
			delta = this.difference(this._drag.pointer, this.pointer(event)),
			stage = this.difference(this._drag.stage.start, delta);

		if (!this.is('dragging')) {
			return;
		}

		event.preventDefault();

		if (this.settings.loop) {
			minimum = this.coordinates(this.minimum());
			maximum = this.coordinates(this.maximum() + 1) - minimum;
			stage.x = (((stage.x - minimum) % maximum + maximum) % maximum) + minimum;
		} else {
			minimum = this.settings.rtl ? this.coordinates(this.maximum()) : this.coordinates(this.minimum());
			maximum = this.settings.rtl ? this.coordinates(this.minimum()) : this.coordinates(this.maximum());
			pull = this.settings.pullDrag ? -1 * delta.x / 5 : 0;
			stage.x = Math.max(Math.min(stage.x, minimum + pull), maximum + pull);
		}

		this._drag.stage.current = stage;

		this.animate(stage.x);
	};

	/**
	 * Handles the `touchend` and `mouseup` events.
	 * @todo #261
	 * @todo Threshold for click event
	 * @protected
	 * @param {Event} event - The event arguments.
	 */
	Owl.prototype.onDragEnd = function(event) {
		var delta = this.difference(this._drag.pointer, this.pointer(event)),
			stage = this._drag.stage.current,
			direction = delta.x > 0 ^ this.settings.rtl ? 'left' : 'right';

		$(document).off('.owl.core');

		this.$element.removeClass(this.options.grabClass);

		if (delta.x !== 0 && this.is('dragging') || !this.is('valid')) {
			this.speed(this.settings.dragEndSpeed || this.settings.smartSpeed);
			this.current(this.closest(stage.x, delta.x !== 0 ? direction : this._drag.direction));
			this.invalidate('position');
			this.update();

			this._drag.direction = direction;

			if (Math.abs(delta.x) > 3 || new Date().getTime() - this._drag.time > 300) {
				this._drag.target.one('click.owl.core', function() { return false; });
			}
		}

		if (!this.is('dragging')) {
			return;
		}

		this.leave('dragging');
		this.trigger('dragged');
	};

	/**
	 * Gets absolute position of the closest item for a coordinate.
	 * @todo Setting `freeDrag` makes `closest` not reusable. See #165.
	 * @protected
	 * @param {Number} coordinate - The coordinate in pixel.
	 * @param {String} direction - The direction to check for the closest item. Ether `left` or `right`.
	 * @return {Number} - The absolute position of the closest item.
	 */
	Owl.prototype.closest = function(coordinate, direction) {
		var position = -1,
			pull = 30,
			width = this.width(), // visible carousel width
			count = this.settings.items,
			itemWidth = Math.round(width / count),
			coordinates = this.coordinates();

		if (!this.settings.freeDrag) {
			// check closest item
			$.each(coordinates, $.proxy(function(index, value) {
				// on a left pull, check on current index
				if (direction === 'left' && coordinate > value - pull && coordinate < value + pull) {
					position = index;
				// on a right pull, check on previous index
				// to do so, subtract width from value and set position = index + 1
				} else if (direction === 'right' && coordinate > value - itemWidth - pull && coordinate < value - itemWidth + pull) {
					position = index + 1;
				} else if (this.op(coordinate, '<', value)
					&& this.op(coordinate, '>', coordinates[index + 1] !== undefined ? coordinates[index + 1] : value - width)) {
					position = direction === 'left' ? index + 1 : index;
				}
				return position === -1;
			}, this));
		}

		if (!this.settings.loop) {
			// non loop boundries
			if (this.op(coordinate, '>', coordinates[this.minimum()])) {
				position = coordinate = this.minimum();
			} else if (this.op(coordinate, '<', coordinates[this.maximum()])) {
				position = coordinate = this.maximum();
			}
		}

		return position;
	};

	/**
	 * Animates the stage.
	 * @todo #270
	 * @public
	 * @param {Number} coordinate - The coordinate in pixels.
	 */
	Owl.prototype.animate = function(coordinate) {
		var animate = this.speed() > 0;

		this.is('animating') && this.onTransitionEnd();

		if (animate) {
			this.enter('animating');
			this.trigger('translate');
		}

		if ($.support.transform3d && $.support.transition) {
			this.$stage.css({
				transform: 'translate3d(' + coordinate + 'px,0px,0px)',
				transition: (this.speed() / 1000) + 's' + (
					this.settings.slideTransition ? ' ' + this.settings.slideTransition : ''
				)
			});
		} else if (animate) {
			this.$stage.animate({
				left: coordinate + 'px'
			}, this.speed(), this.settings.fallbackEasing, $.proxy(this.onTransitionEnd, this));
		} else {
			this.$stage.css({
				left: coordinate + 'px'
			});
		}
	};

	/**
	 * Checks whether the carousel is in a specific state or not.
	 * @param {String} state - The state to check.
	 * @returns {Boolean} - The flag which indicates if the carousel is busy.
	 */
	Owl.prototype.is = function(state) {
		return this._states.current[state] && this._states.current[state] > 0;
	};

	/**
	 * Sets the absolute position of the current item.
	 * @public
	 * @param {Number} [position] - The new absolute position or nothing to leave it unchanged.
	 * @returns {Number} - The absolute position of the current item.
	 */
	Owl.prototype.current = function(position) {
		if (position === undefined) {
			return this._current;
		}

		if (this._items.length === 0) {
			return undefined;
		}

		position = this.normalize(position);

		if (this._current !== position) {
			var event = this.trigger('change', { property: { name: 'position', value: position } });

			if (event.data !== undefined) {
				position = this.normalize(event.data);
			}

			this._current = position;

			this.invalidate('position');

			this.trigger('changed', { property: { name: 'position', value: this._current } });
		}

		return this._current;
	};

	/**
	 * Invalidates the given part of the update routine.
	 * @param {String} [part] - The part to invalidate.
	 * @returns {Array.<String>} - The invalidated parts.
	 */
	Owl.prototype.invalidate = function(part) {
		if ($.type(part) === 'string') {
			this._invalidated[part] = true;
			this.is('valid') && this.leave('valid');
		}
		return $.map(this._invalidated, function(v, i) { return i });
	};

	/**
	 * Resets the absolute position of the current item.
	 * @public
	 * @param {Number} position - The absolute position of the new item.
	 */
	Owl.prototype.reset = function(position) {
		position = this.normalize(position);

		if (position === undefined) {
			return;
		}

		this._speed = 0;
		this._current = position;

		this.suppress([ 'translate', 'translated' ]);

		this.animate(this.coordinates(position));

		this.release([ 'translate', 'translated' ]);
	};

	/**
	 * Normalizes an absolute or a relative position of an item.
	 * @public
	 * @param {Number} position - The absolute or relative position to normalize.
	 * @param {Boolean} [relative=false] - Whether the given position is relative or not.
	 * @returns {Number} - The normalized position.
	 */
	Owl.prototype.normalize = function(position, relative) {
		var n = this._items.length,
			m = relative ? 0 : this._clones.length;

		if (!this.isNumeric(position) || n < 1) {
			position = undefined;
		} else if (position < 0 || position >= n + m) {
			position = ((position - m / 2) % n + n) % n + m / 2;
		}

		return position;
	};

	/**
	 * Converts an absolute position of an item into a relative one.
	 * @public
	 * @param {Number} position - The absolute position to convert.
	 * @returns {Number} - The converted position.
	 */
	Owl.prototype.relative = function(position) {
		position -= this._clones.length / 2;
		return this.normalize(position, true);
	};

	/**
	 * Gets the maximum position for the current item.
	 * @public
	 * @param {Boolean} [relative=false] - Whether to return an absolute position or a relative position.
	 * @returns {Number}
	 */
	Owl.prototype.maximum = function(relative) {
		var settings = this.settings,
			maximum = this._coordinates.length,
			iterator,
			reciprocalItemsWidth,
			elementWidth;

		if (settings.loop) {
			maximum = this._clones.length / 2 + this._items.length - 1;
		} else if (settings.autoWidth || settings.merge) {
			iterator = this._items.length;
			if (iterator) {
				reciprocalItemsWidth = this._items[--iterator].width();
				elementWidth = this.$element.width();
				while (iterator--) {
					reciprocalItemsWidth += this._items[iterator].width() + this.settings.margin;
					if (reciprocalItemsWidth > elementWidth) {
						break;
					}
				}
			}
			maximum = iterator + 1;
		} else if (settings.center) {
			maximum = this._items.length - 1;
		} else {
			maximum = this._items.length - settings.items;
		}

		if (relative) {
			maximum -= this._clones.length / 2;
		}

		return Math.max(maximum, 0);
	};

	/**
	 * Gets the minimum position for the current item.
	 * @public
	 * @param {Boolean} [relative=false] - Whether to return an absolute position or a relative position.
	 * @returns {Number}
	 */
	Owl.prototype.minimum = function(relative) {
		return relative ? 0 : this._clones.length / 2;
	};

	/**
	 * Gets an item at the specified relative position.
	 * @public
	 * @param {Number} [position] - The relative position of the item.
	 * @return {jQuery|Array.<jQuery>} - The item at the given position or all items if no position was given.
	 */
	Owl.prototype.items = function(position) {
		if (position === undefined) {
			return this._items.slice();
		}

		position = this.normalize(position, true);
		return this._items[position];
	};

	/**
	 * Gets an item at the specified relative position.
	 * @public
	 * @param {Number} [position] - The relative position of the item.
	 * @return {jQuery|Array.<jQuery>} - The item at the given position or all items if no position was given.
	 */
	Owl.prototype.mergers = function(position) {
		if (position === undefined) {
			return this._mergers.slice();
		}

		position = this.normalize(position, true);
		return this._mergers[position];
	};

	/**
	 * Gets the absolute positions of clones for an item.
	 * @public
	 * @param {Number} [position] - The relative position of the item.
	 * @returns {Array.<Number>} - The absolute positions of clones for the item or all if no position was given.
	 */
	Owl.prototype.clones = function(position) {
		var odd = this._clones.length / 2,
			even = odd + this._items.length,
			map = function(index) { return index % 2 === 0 ? even + index / 2 : odd - (index + 1) / 2 };

		if (position === undefined) {
			return $.map(this._clones, function(v, i) { return map(i) });
		}

		return $.map(this._clones, function(v, i) { return v === position ? map(i) : null });
	};

	/**
	 * Sets the current animation speed.
	 * @public
	 * @param {Number} [speed] - The animation speed in milliseconds or nothing to leave it unchanged.
	 * @returns {Number} - The current animation speed in milliseconds.
	 */
	Owl.prototype.speed = function(speed) {
		if (speed !== undefined) {
			this._speed = speed;
		}

		return this._speed;
	};

	/**
	 * Gets the coordinate of an item.
	 * @todo The name of this method is missleanding.
	 * @public
	 * @param {Number} position - The absolute position of the item within `minimum()` and `maximum()`.
	 * @returns {Number|Array.<Number>} - The coordinate of the item in pixel or all coordinates.
	 */
	Owl.prototype.coordinates = function(position) {
		var multiplier = 1,
			newPosition = position - 1,
			coordinate;

		if (position === undefined) {
			return $.map(this._coordinates, $.proxy(function(coordinate, index) {
				return this.coordinates(index);
			}, this));
		}

		if (this.settings.center) {
			if (this.settings.rtl) {
				multiplier = -1;
				newPosition = position + 1;
			}

			coordinate = this._coordinates[position];
			coordinate += (this.width() - coordinate + (this._coordinates[newPosition] || 0)) / 2 * multiplier;
		} else {
			coordinate = this._coordinates[newPosition] || 0;
		}

		coordinate = Math.ceil(coordinate);

		return coordinate;
	};

	/**
	 * Calculates the speed for a translation.
	 * @protected
	 * @param {Number} from - The absolute position of the start item.
	 * @param {Number} to - The absolute position of the target item.
	 * @param {Number} [factor=undefined] - The time factor in milliseconds.
	 * @returns {Number} - The time in milliseconds for the translation.
	 */
	Owl.prototype.duration = function(from, to, factor) {
		if (factor === 0) {
			return 0;
		}

		return Math.min(Math.max(Math.abs(to - from), 1), 6) * Math.abs((factor || this.settings.smartSpeed));
	};

	/**
	 * Slides to the specified item.
	 * @public
	 * @param {Number} position - The position of the item.
	 * @param {Number} [speed] - The time in milliseconds for the transition.
	 */
	Owl.prototype.to = function(position, speed) {
		var current = this.current(),
			revert = null,
			distance = position - this.relative(current),
			direction = (distance > 0) - (distance < 0),
			items = this._items.length,
			minimum = this.minimum(),
			maximum = this.maximum();

		if (this.settings.loop) {
			if (!this.settings.rewind && Math.abs(distance) > items / 2) {
				distance += direction * -1 * items;
			}

			position = current + distance;
			revert = ((position - minimum) % items + items) % items + minimum;

			if (revert !== position && revert - distance <= maximum && revert - distance > 0) {
				current = revert - distance;
				position = revert;
				this.reset(current);
			}
		} else if (this.settings.rewind) {
			maximum += 1;
			position = (position % maximum + maximum) % maximum;
		} else {
			position = Math.max(minimum, Math.min(maximum, position));
		}

		this.speed(this.duration(current, position, speed));
		this.current(position);

		if (this.isVisible()) {
			this.update();
		}
	};

	/**
	 * Slides to the next item.
	 * @public
	 * @param {Number} [speed] - The time in milliseconds for the transition.
	 */
	Owl.prototype.next = function(speed) {
		speed = speed || false;
		this.to(this.relative(this.current()) + 1, speed);
	};

	/**
	 * Slides to the previous item.
	 * @public
	 * @param {Number} [speed] - The time in milliseconds for the transition.
	 */
	Owl.prototype.prev = function(speed) {
		speed = speed || false;
		this.to(this.relative(this.current()) - 1, speed);
	};

	/**
	 * Handles the end of an animation.
	 * @protected
	 * @param {Event} event - The event arguments.
	 */
	Owl.prototype.onTransitionEnd = function(event) {

		// if css2 animation then event object is undefined
		if (event !== undefined) {
			event.stopPropagation();

			// Catch only owl-stage transitionEnd event
			if ((event.target || event.srcElement || event.originalTarget) !== this.$stage.get(0)) {
				return false;
			}
		}

		this.leave('animating');
		this.trigger('translated');
	};

	/**
	 * Gets viewport width.
	 * @protected
	 * @return {Number} - The width in pixel.
	 */
	Owl.prototype.viewport = function() {
		var width;
		if (this.options.responsiveBaseElement !== window) {
			width = $(this.options.responsiveBaseElement).width();
		} else if (window.innerWidth) {
			width = window.innerWidth;
		} else if (document.documentElement && document.documentElement.clientWidth) {
			width = document.documentElement.clientWidth;
		} else {
			console.warn('Can not detect viewport width.');
		}
		return width;
	};

	/**
	 * Replaces the current content.
	 * @public
	 * @param {HTMLElement|jQuery|String} content - The new content.
	 */
	Owl.prototype.replace = function(content) {
		this.$stage.empty();
		this._items = [];

		if (content) {
			content = (content instanceof jQuery) ? content : $(content);
		}

		if (this.settings.nestedItemSelector) {
			content = content.find('.' + this.settings.nestedItemSelector);
		}

		content.filter(function() {
			return this.nodeType === 1;
		}).each($.proxy(function(index, item) {
			item = this.prepare(item);
			this.$stage.append(item);
			this._items.push(item);
			this._mergers.push(item.find('[data-merge]').addBack('[data-merge]').attr('data-merge') * 1 || 1);
		}, this));

		this.reset(this.isNumeric(this.settings.startPosition) ? this.settings.startPosition : 0);

		this.invalidate('items');
	};

	/**
	 * Adds an item.
	 * @todo Use `item` instead of `content` for the event arguments.
	 * @public
	 * @param {HTMLElement|jQuery|String} content - The item content to add.
	 * @param {Number} [position] - The relative position at which to insert the item otherwise the item will be added to the end.
	 */
	Owl.prototype.add = function(content, position) {
		var current = this.relative(this._current);

		position = position === undefined ? this._items.length : this.normalize(position, true);
		content = content instanceof jQuery ? content : $(content);

		this.trigger('add', { content: content, position: position });

		content = this.prepare(content);

		if (this._items.length === 0 || position === this._items.length) {
			this._items.length === 0 && this.$stage.append(content);
			this._items.length !== 0 && this._items[position - 1].after(content);
			this._items.push(content);
			this._mergers.push(content.find('[data-merge]').addBack('[data-merge]').attr('data-merge') * 1 || 1);
		} else {
			this._items[position].before(content);
			this._items.splice(position, 0, content);
			this._mergers.splice(position, 0, content.find('[data-merge]').addBack('[data-merge]').attr('data-merge') * 1 || 1);
		}

		this._items[current] && this.reset(this._items[current].index());

		this.invalidate('items');

		this.trigger('added', { content: content, position: position });
	};

	/**
	 * Removes an item by its position.
	 * @todo Use `item` instead of `content` for the event arguments.
	 * @public
	 * @param {Number} position - The relative position of the item to remove.
	 */
	Owl.prototype.remove = function(position) {
		position = this.normalize(position, true);

		if (position === undefined) {
			return;
		}

		this.trigger('remove', { content: this._items[position], position: position });

		this._items[position].remove();
		this._items.splice(position, 1);
		this._mergers.splice(position, 1);

		this.invalidate('items');

		this.trigger('removed', { content: null, position: position });
	};

	/**
	 * Preloads images with auto width.
	 * @todo Replace by a more generic approach
	 * @protected
	 */
	Owl.prototype.preloadAutoWidthImages = function(images) {
		images.each($.proxy(function(i, element) {
			this.enter('pre-loading');
			element = $(element);
			$(new Image()).one('load', $.proxy(function(e) {
				element.attr('src', e.target.src);
				element.css('opacity', 1);
				this.leave('pre-loading');
				!this.is('pre-loading') && !this.is('initializing') && this.refresh();
			}, this)).attr('src', (window.devicePixelRatio > 1) ? element.attr('data-src-retina') : element.attr('data-src') || element.attr('src'));
		}, this));
	};

	/**
	 * Destroys the carousel.
	 * @public
	 */
	Owl.prototype.destroy = function() {

		this.$element.off('.owl.core');
		this.$stage.off('.owl.core');
		$(document).off('.owl.core');

		if (this.settings.responsive !== false) {
			window.clearTimeout(this.resizeTimer);
			this.off(window, 'resize', this._handlers.onThrottledResize);
		}

		for (var i in this._plugins) {
			this._plugins[i].destroy();
		}

		this.$stage.children('.cloned').remove();

		this.$stage.unwrap();
		this.$stage.children().contents().unwrap();
		this.$stage.children().unwrap();
		this.$stage.remove();
		this.$element
			.removeClass(this.options.refreshClass)
			.removeClass(this.options.loadingClass)
			.removeClass(this.options.loadedClass)
			.removeClass(this.options.rtlClass)
			.removeClass(this.options.dragClass)
			.removeClass(this.options.grabClass)
			.attr('class', this.$element.attr('class').replace(new RegExp(this.options.responsiveClass + '-\\S+\\s', 'g'), ''))
			.removeData('owl.carousel');
	};

	/**
	 * Operators to calculate right-to-left and left-to-right.
	 * @protected
	 * @param {Number} [a] - The left side operand.
	 * @param {String} [o] - The operator.
	 * @param {Number} [b] - The right side operand.
	 */
	Owl.prototype.op = function(a, o, b) {
		var rtl = this.settings.rtl;
		switch (o) {
			case '<':
				return rtl ? a > b : a < b;
			case '>':
				return rtl ? a < b : a > b;
			case '>=':
				return rtl ? a <= b : a >= b;
			case '<=':
				return rtl ? a >= b : a <= b;
			default:
				break;
		}
	};

	/**
	 * Attaches to an internal event.
	 * @protected
	 * @param {HTMLElement} element - The event source.
	 * @param {String} event - The event name.
	 * @param {Function} listener - The event handler to attach.
	 * @param {Boolean} capture - Wether the event should be handled at the capturing phase or not.
	 */
	Owl.prototype.on = function(element, event, listener, capture) {
		if (element.addEventListener) {
			element.addEventListener(event, listener, capture);
		} else if (element.attachEvent) {
			element.attachEvent('on' + event, listener);
		}
	};

	/**
	 * Detaches from an internal event.
	 * @protected
	 * @param {HTMLElement} element - The event source.
	 * @param {String} event - The event name.
	 * @param {Function} listener - The attached event handler to detach.
	 * @param {Boolean} capture - Wether the attached event handler was registered as a capturing listener or not.
	 */
	Owl.prototype.off = function(element, event, listener, capture) {
		if (element.removeEventListener) {
			element.removeEventListener(event, listener, capture);
		} else if (element.detachEvent) {
			element.detachEvent('on' + event, listener);
		}
	};

	/**
	 * Triggers a public event.
	 * @todo Remove `status`, `relatedTarget` should be used instead.
	 * @protected
	 * @param {String} name - The event name.
	 * @param {*} [data=null] - The event data.
	 * @param {String} [namespace=carousel] - The event namespace.
	 * @param {String} [state] - The state which is associated with the event.
	 * @param {Boolean} [enter=false] - Indicates if the call enters the specified state or not.
	 * @returns {Event} - The event arguments.
	 */
	Owl.prototype.trigger = function(name, data, namespace, state, enter) {
		var status = {
			item: { count: this._items.length, index: this.current() }
		}, handler = $.camelCase(
			$.grep([ 'on', name, namespace ], function(v) { return v })
				.join('-').toLowerCase()
		), event = $.Event(
			[ name, 'owl', namespace || 'carousel' ].join('.').toLowerCase(),
			$.extend({ relatedTarget: this }, status, data)
		);

		if (!this._supress[name]) {
			$.each(this._plugins, function(name, plugin) {
				if (plugin.onTrigger) {
					plugin.onTrigger(event);
				}
			});

			this.register({ type: Owl.Type.Event, name: name });
			this.$element.trigger(event);

			if (this.settings && typeof this.settings[handler] === 'function') {
				this.settings[handler].call(this, event);
			}
		}

		return event;
	};

	/**
	 * Enters a state.
	 * @param name - The state name.
	 */
	Owl.prototype.enter = function(name) {
		$.each([ name ].concat(this._states.tags[name] || []), $.proxy(function(i, name) {
			if (this._states.current[name] === undefined) {
				this._states.current[name] = 0;
			}

			this._states.current[name]++;
		}, this));
	};

	/**
	 * Leaves a state.
	 * @param name - The state name.
	 */
	Owl.prototype.leave = function(name) {
		$.each([ name ].concat(this._states.tags[name] || []), $.proxy(function(i, name) {
			this._states.current[name]--;
		}, this));
	};

	/**
	 * Registers an event or state.
	 * @public
	 * @param {Object} object - The event or state to register.
	 */
	Owl.prototype.register = function(object) {
		if (object.type === Owl.Type.Event) {
			if (!$.event.special[object.name]) {
				$.event.special[object.name] = {};
			}

			if (!$.event.special[object.name].owl) {
				var _default = $.event.special[object.name]._default;
				$.event.special[object.name]._default = function(e) {
					if (_default && _default.apply && (!e.namespace || e.namespace.indexOf('owl') === -1)) {
						return _default.apply(this, arguments);
					}
					return e.namespace && e.namespace.indexOf('owl') > -1;
				};
				$.event.special[object.name].owl = true;
			}
		} else if (object.type === Owl.Type.State) {
			if (!this._states.tags[object.name]) {
				this._states.tags[object.name] = object.tags;
			} else {
				this._states.tags[object.name] = this._states.tags[object.name].concat(object.tags);
			}

			this._states.tags[object.name] = $.grep(this._states.tags[object.name], $.proxy(function(tag, i) {
				return $.inArray(tag, this._states.tags[object.name]) === i;
			}, this));
		}
	};

	/**
	 * Suppresses events.
	 * @protected
	 * @param {Array.<String>} events - The events to suppress.
	 */
	Owl.prototype.suppress = function(events) {
		$.each(events, $.proxy(function(index, event) {
			this._supress[event] = true;
		}, this));
	};

	/**
	 * Releases suppressed events.
	 * @protected
	 * @param {Array.<String>} events - The events to release.
	 */
	Owl.prototype.release = function(events) {
		$.each(events, $.proxy(function(index, event) {
			delete this._supress[event];
		}, this));
	};

	/**
	 * Gets unified pointer coordinates from event.
	 * @todo #261
	 * @protected
	 * @param {Event} - The `mousedown` or `touchstart` event.
	 * @returns {Object} - Contains `x` and `y` coordinates of current pointer position.
	 */
	Owl.prototype.pointer = function(event) {
		var result = { x: null, y: null };

		event = event.originalEvent || event || window.event;

		event = event.touches && event.touches.length ?
			event.touches[0] : event.changedTouches && event.changedTouches.length ?
				event.changedTouches[0] : event;

		if (event.pageX) {
			result.x = event.pageX;
			result.y = event.pageY;
		} else {
			result.x = event.clientX;
			result.y = event.clientY;
		}

		return result;
	};

	/**
	 * Determines if the input is a Number or something that can be coerced to a Number
	 * @protected
	 * @param {Number|String|Object|Array|Boolean|RegExp|Function|Symbol} - The input to be tested
	 * @returns {Boolean} - An indication if the input is a Number or can be coerced to a Number
	 */
	Owl.prototype.isNumeric = function(number) {
		return !isNaN(parseFloat(number));
	};

	/**
	 * Gets the difference of two vectors.
	 * @todo #261
	 * @protected
	 * @param {Object} - The first vector.
	 * @param {Object} - The second vector.
	 * @returns {Object} - The difference.
	 */
	Owl.prototype.difference = function(first, second) {
		return {
			x: first.x - second.x,
			y: first.y - second.y
		};
	};

	/**
	 * The jQuery Plugin for the Owl Carousel
	 * @todo Navigation plugin `next` and `prev`
	 * @public
	 */
	$.fn.owlCarousel = function(option) {
		var args = Array.prototype.slice.call(arguments, 1);

		return this.each(function() {
			var $this = $(this),
				data = $this.data('owl.carousel');

			if (!data) {
				data = new Owl(this, typeof option == 'object' && option);
				$this.data('owl.carousel', data);

				$.each([
					'next', 'prev', 'to', 'destroy', 'refresh', 'replace', 'add', 'remove'
				], function(i, event) {
					data.register({ type: Owl.Type.Event, name: event });
					data.$element.on(event + '.owl.carousel.core', $.proxy(function(e) {
						if (e.namespace && e.relatedTarget !== this) {
							this.suppress([ event ]);
							data[event].apply(this, [].slice.call(arguments, 1));
							this.release([ event ]);
						}
					}, data));
				});
			}

			if (typeof option == 'string' && option.charAt(0) !== '_') {
				data[option].apply(data, args);
			}
		});
	};

	/**
	 * The constructor for the jQuery Plugin
	 * @public
	 */
	$.fn.owlCarousel.Constructor = Owl;

})(window.Zepto || window.jQuery, window, document);
// source --> https://eternize360.com.br/wp-content/plugins/wpvr-pro/admin/js/jquery.cookie.js?ver=1 
/*!
 * jQuery Cookie Plugin v1.4.1
 * https://github.com/carhartl/jquery-cookie
 *
 * Copyright 2013 Klaus Hartl
 * Released under the MIT license
 */
(function (factory) {
	if (typeof define === 'function' && define.amd) {
		// AMD
		define(['jquery'], factory);
	} else if (typeof exports === 'object') {
		// CommonJS
		factory(require('jquery'));
	} else {
		// Browser globals
		factory(jQuery);
	}
}(function ($) {

	var pluses = /\+/g;

	function encode(s) {
		return config.raw ? s : encodeURIComponent(s);
	}

	function decode(s) {
		return config.raw ? s : decodeURIComponent(s);
	}

	function stringifyCookieValue(value) {
		return encode(config.json ? JSON.stringify(value) : String(value));
	}

	function parseCookieValue(s) {
		if (s.indexOf('"') === 0) {
			// This is a quoted cookie as according to RFC2068, unescape...
			s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\');
		}

		try {
			// Replace server-side written pluses with spaces.
			// If we can't decode the cookie, ignore it, it's unusable.
			// If we can't parse the cookie, ignore it, it's unusable.
			s = decodeURIComponent(s.replace(pluses, ' '));
			return config.json ? JSON.parse(s) : s;
		} catch(e) {}
	}

	function read(s, converter) {
		var value = config.raw ? s : parseCookieValue(s);
		return $.isFunction(converter) ? converter(value) : value;
	}

	var config = $.cookie = function (key, value, options) {

		// Write

		if (value !== undefined && !$.isFunction(value)) {
			options = $.extend({}, config.defaults, options);

			if (typeof options.expires === 'number') {
				var days = options.expires, t = options.expires = new Date();
				t.setTime(+t + days * 864e+5);
			}

			return (document.cookie = [
				encode(key), '=', stringifyCookieValue(value),
				options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
				options.path    ? '; path=' + options.path : '',
				options.domain  ? '; domain=' + options.domain : '',
				options.secure  ? '; secure' : ''
			].join(''));
		}

		// Read

		var result = key ? undefined : {};

		// To prevent the for loop in the first place assign an empty array
		// in case there are no cookies at all. Also prevents odd result when
		// calling $.cookie().
		var cookies = document.cookie ? document.cookie.split('; ') : [];

		for (var i = 0, l = cookies.length; i < l; i++) {
			var parts = cookies[i].split('=');
			var name = decode(parts.shift());
			var cookie = parts.join('=');

			if (key && key === name) {
				// If second argument (value) is a function it's a converter...
				result = read(cookie, value);
				break;
			}

			// Prevent storing a cookie that we couldn't decode.
			if (!key && (cookie = read(cookie)) !== undefined) {
				result[name] = cookie;
			}
		}

		return result;
	};

	config.defaults = {};

	$.removeCookie = function (key, options) {
		if ($.cookie(key) === undefined) {
			return false;
		}

		// Must not alter options, thus extending a fresh object...
		$.cookie(key, '', $.extend({}, options, { expires: -1 }));
		return !$.cookie(key);
	};

}));