58 lines
No EOL
1.6 KiB
JavaScript
58 lines
No EOL
1.6 KiB
JavaScript
(function () {
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var ns = $.namespace("pskl.rendering");
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ns.DrawingLoop = function () {
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this.requestAnimationFrame = this.getRequestAnimationFrameShim_();
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this.isRunning = false;
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this.previousTime = 0;
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this.callbacks = [];
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};
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ns.DrawingLoop.prototype.addCallback = function (callback, scope, args) {
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var callbackObj = {
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fn : callback,
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scope : scope,
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args : args
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};
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this.callbacks.push(callbackObj);
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return callbackObj;
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};
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ns.DrawingLoop.prototype.removeCallback = function (callbackObj) {
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var index = this.callbacks.indexOf(callbackObj);
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if (index != -1) {
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this.callbacks.splice(index, 1);
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}
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};
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ns.DrawingLoop.prototype.start = function () {
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this.isRunning = true;
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this.loop_();
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};
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ns.DrawingLoop.prototype.loop_ = function () {
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var currentTime = Date.now();
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var delta = currentTime - this.previousTime;
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this.executeCallbacks_(delta);
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this.previousTime = currentTime;
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this.requestAnimationFrame.call(window, this.loop_.bind(this));
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};
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ns.DrawingLoop.prototype.executeCallbacks_ = function (deltaTime) {
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for (var i = 0 ; i < this.callbacks.length ; i++) {
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var cb = this.callbacks[i];
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cb.fn.call(cb.scope, deltaTime, cb.args);
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}
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};
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ns.DrawingLoop.prototype.stop = function () {
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this.isRunning = false;
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};
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ns.DrawingLoop.prototype.getRequestAnimationFrameShim_ = function () {
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var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
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window.webkitRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {window.setTimeout(callback, 1000/60)};
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return requestAnimationFrame;
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}
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})() |