Kinetic.Animation=function(a){a||(a={});for(var b in a)this[b]=a[b];this.frame={time:0,timeDiff:0,lastTime:(new Date).getTime()},this.id=Kinetic.Animation.animIdCounter++},Kinetic.Animation.prototype={start:function(){this.stop(),this.frame.lastTime=(new Date).getTime(),Kinetic.Animation._addAnimation(this),Kinetic.Animation._handleAnimation()},stop:function(){Kinetic.Animation._removeAnimation(this)}},Kinetic.Animation.animations=[],Kinetic.Animation.animIdCounter=0,Kinetic.Animation.animRunning=!1,Kinetic.Animation._addAnimation=function(a){this.animations.push(a)},Kinetic.Animation._removeAnimation=function(a){var b=a.id,c=this.animations;for(var d=0;d<c.length;d++)if(c[d].id===b)return this.animations.splice(d,1),!1},Kinetic.Animation._updateFrameObject=function(a){var b=(new Date).getTime();a.frame.timeDiff=b-a.frame.lastTime,a.frame.lastTime=b,a.frame.time+=a.frame.timeDiff},Kinetic.Animation._runFrames=function(){var a={};for(var b=0;b<this.animations.length;b++){var c=this.animations[b];this._updateFrameObject(c),c.node&&c.node._id!==undefined&&(a[c.node._id]=c.node),c.func&&c.func(c.frame)}for(var d in a)a[d].draw()},Kinetic.Animation._animationLoop=function(){if(this.animations.length>0){this._runFrames();var a=this;requestAnimFrame(function(){a._animationLoop()})}else this.animRunning=!1},Kinetic.Animation._handleAnimation=function(){var a=this;this.animRunning||(this.animRunning=!0,a._animationLoop())},requestAnimFrame=function(a){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(a){window.setTimeout(a,1e3/60)}}();