使用PreListener与InteractionListener的一个小发现

 如果两个刚体使用PreListener忽略了它的碰撞时，如果这时你使用InteractionListener来侦听它们的碰撞还是可以侦听到的:

package  {
    import com.bit101.components.TextArea;
    import nape.callbacks.CbEvent;
    import nape.callbacks.CbType;
    import nape.callbacks.InteractionCallback;
    import nape.callbacks.InteractionListener;
    import nape.callbacks.InteractionType;
    import nape.callbacks.PreCallback;
    import nape.callbacks.PreFlag;
    import nape.callbacks.PreListener;
    import nape.phys.Body;
    /**
     * ...
     * @author kingBook
     * 2015-02-01 21:18
     */
    public class Main extends BaseMain {
        
        public function Main() {
            super({gravity:{x:0,y:0}});
            
        }
        
        private var _box:Body;
        private var _circle:Body;
        private var _boxCbType:CbType=new CbType();
        private var _circleCbType:CbType=new CbType();
        private var _textArea:TextArea;
        override protected function createBodies():void {
            //矩形刚体
            _box=createBox(50,50,100,200);
            _box.cbTypes.add(_boxCbType);
            _box.space=_space;
            
            //圆形刚体
            _circle=createCircle(30,250,200);
            _circle.cbTypes.add(_circleCbType);
            _circle.space=_space;
            
            _space.listeners.add(new PreListener(InteractionType.COLLISION,_boxCbType,_circleCbType,ignoreHandler));
            _space.listeners.add(new InteractionListener(CbEvent.BEGIN,InteractionType.COLLISION,_boxCbType,_circleCbType,onHitBegin));
            
            //文本域
            _textArea=new TextArea(this,5,5);
        }
        
        private function ignoreHandler(cb:PreCallback):PreFlag{
            return PreFlag.IGNORE;
        }
        
        private function onHitBegin(cb:InteractionCallback):void{
            _textArea.text += "hit
"
        }
        
    }
    
}

 拖动矩形刚体与圆形刚体相碰依然可以看到输出: hit

源码下载：http://yunpan.cn/cKBwzyNkfJN7P  访问密码 5883