var Animation = function (parent){ 
this.parent = parent; 
this.animationManager = parent.state.sys.anims; 
this.isPlaying = false ; 
this.currentAnim = null ; 
this.currentFrame = null ; 
this.accumulator = 0; 
this.nextTick = 0; 
} 
; 
Animation.prototype.constructor = Animation; 
Animation.prototype = { 
load: function (key, startFrame){ 
if (startFrame === undefined) { 
startFrame = 0; 
} 
if (this.isPlaying) { 
this.stop(); 
} 
_AN_Call_load('load', this.animationManager, this, key, startFrame); 
this.updateFrame(); 
} 
,
play: function (key, startFrame){ 
if (startFrame === undefined) { 
startFrame = 0; 
} 
_AN_Call_load('load', this, key, startFrame); 
this.accumulator = 0; 
this.currentAnim.getNextTick(this); 
this.isPlaying = true ; 
} 
,
stop: function (){ 
this.isPlaying = false ; 
} 
,
updateFrame: function (){ 
this.parent.texture = this.currentFrame.frame.texture; 
this.parent.frame = this.currentFrame.frame; 
} 
,
update: function (timestamp, frameDelta){ 
if (this.isPlaying) { 
this.accumulator += frameDelta; 
if (this.accumulator >= this.nextTick) { 
this.currentAnim.setFrame(this); 
} 
} 
} 
}
; 
module.exports = Animation;