package
  {
          import flash.display.Sprite;
          import flash.events.Event;
          import flash.geom.Matrix;
          import flash.display.StageAlign;
          import flash.display.StageScaleMode;
  
          public class @ax-animation-ch18-SkewX extends Sprite
          {
                  private var box:Sprite;
                  
                  public function @ax-animation-ch18-SkewX()
                  {
                          init();
                  }
                  
                  private function init():void
                  {
                          stage.align = StageAlign.TOP_LEFT;
                          stage.scaleMode = StageScaleMode.NO_SCALE;
                          box = new Sprite();
                          box.graphics.beginFill(0xff0000);
                          box.graphics.drawRect(-50, -50, 100, 100);
                          box.graphics.endFill();
                          addChild(box);
                          addEventListener(Event.ENTER_FRAME, onEnterFrame);
                  }
                  
                  private function onEnterFrame(event:Event):void
                  {
                          var skewX:Number = (mouseX - stage.stageWidth / 2) * .01;
                          box.transform.matrix = new Matrix(1,     0, 
                                                                                            skewX, 1, 
                                                                                            stage.stageWidth / 2,
                                                                                            stage.stageHeight / 2);
                  }
          }
  }