[]刮刮卡效果实现

  var interactionArea;

    var ape;

    var mouseX = 0;



     _proto.onInit = function(){



        this.guaSpr.cacheAs = "bitmap";

        ape = new Sprite();

        this.guaSpr.addChild(ape);

        ape.loadImage("WBSign/img_guakaituceng.png");

        ape.on(Event.MOUSE_MOVE, this, onMouseMove);



        interactionArea = new Sprite();

        interactionArea.blendMode = "destination-out";

        ape.addChild(interactionArea);

        interactionArea.graphics.clear();

        

     }





    function onMouseMove(e)

    {

        if(mouseX!=0){

            if(Math.abs(mouseX-ape.mouseX)>= 360){ //滑动超过多少距离 自动开奖

                ape.visible = false;

                 mouseX = ape.mouseX;

            }

        }else{

            mouseX = ape.mouseX;

        }

        interactionArea.graphics.drawCircle(ape.mouseX, ape.mouseY, 20, "#000000");

    }