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\n"
         }

     }

 }

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