prng-parkmiller-js
Version:
Park-Miller-Carta pseudo-random number generator library
40 lines (23 loc) • 1.22 kB
JavaScript
// 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 ); };
}
}() );