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.events.MouseEvent;
      import flash.filters.BlurFilter;
      import flash.geom.Matrix;
      import flash.geom.Point;
      import flash.geom.Rectangle;
      import flash.media.Camera;
      import flash.media.Video;
  
      public class @ax-lib-flex-animation-code-05-ColorTracking extends Sprite
      {
          private var _cam:Camera;
          private var _vid:Video;
          private var _bmpd:BitmapData;
          private var _cbRect:Sprite;
          private var _color:uint = 0xffffff;
          private var _red:Array;
          private var _green:Array;
          private var _blue:Array;
          private var _ball:Sprite;
          
          public function @ax-lib-flex-animation-code-05-ColorTracking()
          {
              stage.align = StageAlign.TOP_LEFT;
              stage.scaleMode = StageScaleMode.NO_SCALE;
              
              _cam = Camera.getCamera();
              _cam.setMode(320, 240, 15);
              _vid = new Video(320, 240);
              _vid.attachCamera(_cam);
              _vid.filters = [new BlurFilter(10, 10, 1)];
              
              _bmpd = new BitmapData(320, 240, false);
              addChild(new Bitmap(_bmpd));
              
              _cbRect = new Sprite();
              addChild(_cbRect);
              
              _ball = new Sprite();
              _ball.graphics.beginFill(0x0000ff);
              _ball.graphics.drawCircle(0, 0, 40);
              _ball.graphics.endFill();
              addChild(_ball);
              
              makePaletteArrays();
              
              addEventListener(Event.ENTER_FRAME, onEnterFrame);
              stage.addEventListener(MouseEvent.CLICK, onClick);
              
          }
          
          private function makePaletteArrays():void
          {
                  _red = new Array();
                  _green = new Array();
                  _blue = new Array();
                  var levels:int = 4;
                         var div:int = 256 / levels;
                  for(var i:int = 0; i < 256; i++)
                  {
                          var value:Number = Math.floor(i / div ) * div; 
                          _red[i] = value << 16;
                          _green[i] = value << 8;
                          _blue[i] = value
                  }
          }
          
          private function onClick(event:MouseEvent):void
          {
                  _color = _bmpd.getPixel(mouseX, mouseY);
          }
          
          private function onEnterFrame(event:Event):void
          {
              _bmpd.draw(_vid, new Matrix(-1, 0, 0, 1, _bmpd.width, 0));
              _bmpd.paletteMap(_bmpd, _bmpd.rect, new Point(), _red, _green, _blue);
              
              var rect:Rectangle = _bmpd.getColorBoundsRect(0xffffff, _color, true);
              _cbRect.graphics.clear();
              _cbRect.graphics.lineStyle(1, 0xff0000);
              _cbRect.graphics.drawRect(rect.x, rect.y, rect.width, rect.height);
              
              if(!rect.isEmpty())
              {
                      var xCenter:Number = rect.x + rect.width / 2;
                      var yCenter:Number = rect.y + rect.height / 2;
                      _ball.x = xCenter / _bmpd.width * stage.stageWidth;
                      _ball.y = yCenter / _bmpd.height * stage.stageHeight; 
                  }
          }
      }
  }