Three.js

/**
 * @author mr.doob / http://mrdoob.com/
 */

var THREE = THREE || { REVISION: '49dev' };

if ( ! self.Int32Array ) {

	self.Int32Array = Array;
	self.Float32Array = Array;

}

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller
// fixes from Paul Irish and Tino Zijdel

( function () {

	var lastTime = 0;
	var vendors = [ 'ms', 'moz', 'webkit', 'o' ];

	for ( var x = 0; x < vendors.length && !window.requestAnimationFrame; ++ x ) {

		window.requestAnimationFrame = window[ vendors[ x ] + 'RequestAnimationFrame' ];
		window.cancelAnimationFrame = window[ vendors[ x ] + 'CancelAnimationFrame' ] || window[ vendors[ x ] + 'CancelRequestAnimationFrame' ];

	}

	if ( !window.requestAnimationFrame ) {

		window.requestAnimationFrame = function ( callback, element ) {

			var currTime = Date.now(), timeToCall = Math.max( 0, 16 - ( currTime - lastTime ) );
			var id = window.setTimeout( function() { callback( currTime + timeToCall ); }, timeToCall );
			lastTime = currTime + timeToCall;
			return id;

		};

	}


	if ( !window.cancelAnimationFrame ) {

		window.cancelAnimationFrame = function ( id ) { clearTimeout( id ); };

	}

}() );