flash builder - Flex AS3 asynchronous sprite (MovieClip) animation -

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i'm using starling framework under flex as3 project. i've sprite named bird , use altas animation.

my problem is, there 2 bird in screen , both of them flaps @ same time. want flap asynchronous.

how can this, can give start frame number each of them ? thanks..

public class bird extends sprite {     private var bird_mc:movieclip;      public function bird(startframe:number = 0)     {         super();         this.addeventlistener(starling.events.event.added_to_stage, onaddedtostage);     }      private function onaddedtostage(event:event):void     {         this.removeeventlistener(event.added_to_stage, onaddedtostage);         createbird_mc();     }      private function createbird_mc():void     {         bird_mc = new movieclip(assets.getatlas().gettextures("bird_"), 16);         bird_mc.x = math.ceil(-bird_mc.width/2);         bird_mc.y = math.ceil(-bird_mc.height/2);         starling.core.starling.juggler.add(bird_mc);         this.addchild(bird_mc);     } }

the solution setting activeframe before add stage.


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