//图层定位,以屏幕中心偏移

         var offsetX = 0;

         var offsetY = 0;

         //图层大小

         var clipWidth = 600;

         var clipHeight =400;

         //圆角半径

         var radius =25;

         //圆角层实现代码

         var size = cc.winSize;

         var stencil = new cc.DrawNode();

         stencil.drawRect(cc.p((size.width-clipWidth)/2+offsetX,(size.height-clipHeight)/2+offsetY+radius),cc.p(size.width/2+clipWidth/2+offsetX,size.height/2+clipHeight/2+offsetY-radius),cc.color(0,0,0),1,cc.color(0,0,0));

         stencil.drawRect(cc.p((size.width-clipWidth)/2+offsetX+radius,(size.height-clipHeight)/2+offsetY),cc.p(size.width/2+clipWidth/2+offsetX-radius,size.height/2+clipHeight/2+offsetY),cc.color(0,0,0),1,cc.color(0,0,0));

         stencil.drawCircle(cc.p(size.width/2-clipWidth/2+offsetX+radius,size.height/2-clipHeight/2+offsetY+radius),radius/3,0,100,false,radius,cc.color(0,0,0));

         stencil.drawCircle(cc.p(size.width/2+clipWidth/2+offsetX-radius,size.height/2-clipHeight/2+offsetY+radius),radius/3,0,100,false,radius,cc.color(0,0,0));

         stencil.drawCircle(cc.p(size.width/2+clipWidth/2+offsetX-radius,size.height/2+clipHeight/2+offsetY-radius),radius/3,0,100,false,radius,cc.color(0,0,0));

         stencil.drawCircle(cc.p(size.width/2-clipWidth/2+offsetX+radius,size.height/2+clipHeight/2+offsetY-radius),radius/3,0,100,false,radius,cc.color(0,0,0));

         var clippingPanel = new cc.ClippingNode();

         clippingPanel.stencil = stencil;

         //层颜色

         var layer = new cc.LayerColor(cc.color(255,0,0),clipWidth,clipHeight);

         layer.x = (size.width-clipWidth)/2+offsetX;

         layer.y = (size.height-clipHeight)/2+offsetY;

         //层透明度

         layer.opacity = 200;

         clippingPanel.addChild(layer);

         this.addChild(clippingPanel);