关节联动简单示例

package cn.d
{
    import flash.display.Sprite;
    import flash.events.Event;

    public class TwoSegment2 extends Sprite
    {
        private var sg1:Segment;
        private var sg2:Segment;

        public function TwoSegment2()
        {
            super();
            init();
        }

        private function init():void
        {
            sg1=new Segment(100, 20);
            this.addChild(sg1);

            sg2=new Segment(100, 20);
            this.addChild(sg2);

            sg1.x=300;
            sg1.y=300;
            
            sg2.x=sg1.getPin().x;
            sg2.y=sg1.getPin().y;
            
            this.addEventListener(Event.ENTER_FRAME, onEnterFrame)
        }

        private function onEnterFrame(e:Event):void
        {
            var dx:Number=mouseX - sg1.x;
            var dy:Number=mouseY - sg1.y;

            var angle:Number=Math.atan2(dy, dx);
            sg1.rotation=angle * (180 / Math.PI);

            var w:Number=sg1.getPin().x - sg1.x;
            var h:Number=sg1.getPin().y - sg1.y;

            var tx:Number=mouseX - w;
            var ty:Number=mouseY - h;

            dx=tx - sg2.x;
            dy=ty - sg2.y;

            angle=Math.atan2(dy,dx);
            
            sg2.rotation=angle*(180/Math.PI);

            //sg1.x=sg2.getPin().x;
            //sg1.y=sg2.getPin().y;

        }

    }
}