用鼠标方向改变的 左右上下移动

package
{
    import flash.display.Sprite;
    import flash.events.Event;
    
    /**
     *根据鼠标移入的方向来改变旋转的方向 
     * @author Administrator
     * 
     */    
    public class Rotate3 extends Sprite
    {
        private var balls:Array=[];
        private var numHandle:int=10;
        private var vr:Number=.05;
        
        public function Rotate3()
        {
            super();
            
            for(var i:int=0;i<numHandle;i++)
            {
                var ball:Ball=new Ball;
                ball.x=Math.random() * stage.stageWidth;
                ball.y=Math.random() * stage.stageHeight;
                
                this.addChild(ball);
                
                balls.push(ball);
                
            }
            
            this.addEventListener(Event.ENTER_FRAME,onEnterFrame);
        }
        
        private function onEnterFrame(e:Event):void
        {
            //这个是左右
            //var angle:Number=(mouseX-stage.stageWidth/2)*.001;
            //这个是上下
            var angle:Number=(mouseY-stage.stageHeight/2)*.001;
            
            
            var cos:Number=Math.cos(angle);
            var sin:Number=Math.sin(angle);
            
            for(var i:int=0;i<numHandle;i++)
            {
                var ball:Ball=balls[i] as Ball;
                
                var vx:Number=ball.x-stage.stageWidth/2;
                var vy:Number=ball.y-stage.stageHeight/2;
                
                var x2:Number=cos*vx+sin*vy;
                var y2:Number=cos*vy-sin*vx;
                
                ball.x=stage.stageWidth/2+x2;
                ball.y=stage.stageHeight/2+y2;
                
            }
            
            
        }
        
    }
}