package {
          import flash.display.Bitmap;
          import flash.display.BitmapData;
          import flash.display.Sprite;
          import flash.display.StageAlign;
          import flash.display.StageScaleMode;
          import flash.events.Event;
          import flash.geom.Rectangle;
          import flash.media.Microphone;
  
          [SWF(backgroundColor=0xffffff)]
          public class @ax-lib-flex-animation-code-05-SoundFlier extends Sprite
          {
                  private var _mic:Microphone;
                  private var _flier:Sprite;
                  private var _background:Bitmap;
                  private var _vy:Number = 0;
                  
                  
                  public function @ax-lib-flex-animation-code-05-SoundFlier()
                  {
                          stage.align = StageAlign.TOP_LEFT;
                          stage.scaleMode = StageScaleMode.NO_SCALE;
                          
                          makeBackground();
                          makeFlier();
                          
                          _mic = Microphone.getMicrophone();
                          _mic.setLoopBack(true);
                          addEventListener(Event.ENTER_FRAME, onEnterFrame);
                  }
                  
                  private function makeBackground():void
                  {
                          var bmpd:BitmapData = new BitmapData(stage.stageWidth, stage.stageHeight, false);
                          _background = new Bitmap(bmpd);
                          addChild(_background);
                  }
                  
                  private function makeFlier():void
                  {
                          _flier = new Sprite();
                          _flier.graphics.lineStyle(0);
                          _flier.graphics.moveTo(-10, 0);
                          _flier.graphics.lineTo(-10, -8);
                          _flier.graphics.lineTo(-7, -4);
                          _flier.graphics.lineTo(10, 0);
                          _flier.graphics.lineTo(-10, 0);
                          _flier.x = 100;
                          _flier.y = stage.stageHeight - 50;
                          addChild(_flier);
                  }
                  
                  private function onEnterFrame(event:Event):void
                  {
                          _vy += .4;
                          _vy -= _mic.activityLevel * .02;
                          _flier.y += _vy;
                          _vy *= .9;
                          _flier.y = Math.min(_flier.y, stage.stageHeight - 20);
                          _flier.y = Math.max(_flier.y, 20);
                          
                          var h:Number = Math.random() * 120;
                          _background.bitmapData.fillRect(new Rectangle(stage.stageWidth - 20, 0, 5, h), 0xcccccc);
                          
                          h = Math.random() * 120;
                          _background.bitmapData.fillRect(new Rectangle(stage.stageWidth - 20, stage.stageHeight - h, 5, h), 0xcccccc);
                          
                          _background.bitmapData.scroll(-5, 0);
                  }
          }
  }