[Flashcoders] removeChild error

[Bieniasz, Myles]

I'm just starting to fool around with as3 and having a little fun with
computeSpectrum.  I keep getting an error when I try to removeChild.
I'm using the Flash CS3 trial and setting the document class to
mySpectrum.  Any help/explanation would be greatly appreciated.  Thanks
in advance

 

Here's my script:

 

package{

            

            import flash.display.*;

            import flash.media.*;

            import flash.net.*;

            import flash.utils.*;

            import flash.events.*;

            import flash.display.Stage;

            

            public class mySpectrum extends Sprite{

                        

                        private var _s:Sound;

                        private var _sc:SoundChannel;

                        private var _ba:ByteArray = new ByteArray();

                        

                        public function mySpectrum(){

                                    stage.frameRate = 31;

                                    _s = new Sound();

                                    _s.load(new
URLRequest("bad_plus.mp3"));

                                    _sc = _s.play(0,1000);

                                    addEventListener(Event.ENTER_FRAME,
get_spectrum);

                        }

                        

                        private function get_spectrum(event:Event):void{

 
SoundMixer.computeSpectrum(_ba,true,0);

                                    graphics.clear();

                                    graphics.lineStyle(1,0xffffcc,100);

                                    var amp:Number = 0;

                                    for(var i:uint = 0; i<512; i++){

                                                var level:Number =
_ba.readFloat();

                                                amp += level;

                                    }

 
graphics.drawCircle(stage.stageWidth/2,stage.stageHeight/2,amp);

                                    if(amp > 50){

                                                drawBurst(amp);

                                    }

                        }

                        

                        private function drawBurst(burst:Number):void{

                                    var burst_sprite:Sprite = new
Sprite();

 
burst_sprite.graphics.lineStyle(1,0xffffcc,(burst*.01));

 
burst_sprite.graphics.beginFill(0xffffcc,(burst*.01));

 
burst_sprite.graphics.drawCircle(Math.random() * stage.stageWidth,
Math.random() * stage.stageHeight, burst);

                                    addChild(burst_sprite);

 
burst_sprite.addEventListener(Event.ENTER_FRAME, fade_out);

                        }

                        

                        private function fade_out(event:Event):void{

                                    event.target.alpha -=.05;

                                    if(event.target.alpha <.1){

 
removeChild(DisplayObject(event.target));

                                    }

                                    

                        }

                        

            }

            

}

 

And here's the error:

 

ArgumentError: Error #2025: The supplied DisplayObject must be a child
of the caller.

            at flash.display::DisplayObjectContainer/removeChild()

            at mySpectrum/::fade_out()

 

Myles Bieniasz

MLB Advanced Media

212.485.6129

[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> 

 

 


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