第10章碰撞检测概要.pptx

第10章 碰撞检测;10.1 什么是碰撞检测;10.2 Flash现成的碰撞检测方法;4;5;6;var i:uint=0; while (i10) { var flower_mc:Flower = new Flower(); this.addChild(flower_mc); flower_mc.x =Math.random () * (stage.stageWidth - flower_mc.width/2); flower_mc.y =Math.random () * (stage.stageHeight - flower_mc.height/2); flower_mc.scaleX=flower_mc.scaleY=0.6+Math.random()*0.4; i=i+1; } ;this.addEventListener(MouseEvent.MOUSE_MOVE,moveHandle); function moveHandle(e:MouseEvent) { var j:uint=0; while (j10) { if (this.getChildAt(j).hitTestPoint(this.mouseX,this.mouseY)) { this.getChildAt(j).x=Math.random()*stage.stageWidth; this.getChildAt(j).y=Math.random()*stage.stageHeight; this.getChildAt(j).alpha=Math.random(); this.getChildAt(j).scaleX=this.getChildAt(j).scaleY=Math.random(); } j=j+1; } };9;for (var i:uint=0; i10; i++) { var f_mc:Flower = new Flower(); this.addChild(f_mc); f_mc.x=Math.random()*(this.stage.stageWidth-f_mc.width)+f_mc.width/2; f_mc.y=Math.random()*(this.stage.stageHeight-f_mc.height)+f_mc.height/2; f_mc.scaleX=f_mc.scaleY=Math.random()*0.1+0.2; f_mc.name=flow_+i; } bow_mc.stop();//弓箭影片剪辑停止在第1帧 bow_mc.startDrag(true);//弓箭可以被拖动 ;bow_mc.addEventListener(MouseEvent.MOUSE_DOWN,playAllow); //如果弓箭被按下，则播放bow_mc影片剪辑中的拉弓动作 function playAllow(e:MouseEvent) { bow_mc.gotoAndPlay(1); };//鼠标释放之后送出箭头 bow_mc.addEventListener(MouseEvent.MOUSE_UP,createAllow); function createAllow(e:MouseEvent) { var arrow_mc:Arrow =new Arrow(); arrow_mc.scaleX=0.3; arrow_mc.scaleY=0.3; arrow_mc.x=this.mouseX; arrow_mc.y=this.mouseY; this.addChild(arrow_mc); arrow_mc.addEventListener(Event.ENTER_FRAME,flyAllow); arrow_mc.flySpeed = 12;//设定弓箭的初始速度 };function flyAllow(e:Event):void { var moveArrow:Arrow=e.target as Arrow; moveArrow.flySpeed = moveArrow.flySpeed*0.98;//由于地球引力的缘故，飞行速度逐渐减慢 moveArrow.y-=moveArrow.flySpeed; for (var j:uint=0; j10; j++) { if (this.getChildByName(flow_+j).hitTestObject(moveArrow)) { this.getChildByName(flow_+j).x=- this.getChildByName(flow_+j).width;