package
{
 import flash.display.Sprite;
 import flash.events.Event;
 
 public class animation_ch03_RotateToMouse extends Sprite {
  private var arrow:Arrow;
  
  public function animation_ch03_RotateToMouse() {
   init();
  }
//@ init(s)
  private function init():void {
   arrow = new Arrow();
   addChild(arrow);
   arrow.x = stage.stageWidth / 2;
   arrow.y = stage.stageHeight / 2;
   addEventListener(Event.ENTER_FRAME, onEnterFrame);
  }
//@ frame(s)
  public function onEnterFrame(event:Event):void {
   var dx:Number = mouseX - arrow.x;
   var dy:Number = mouseY - arrow.y;
   var radians:Number = Math.atan2(dy, dx);
   arrow.rotation = radians * 180 / Math.PI;
  }
 }
}