cocos2dx 3.x ClippingNode裁剪图形

	auto clipNode = ClippingNode::create();
	clipNode->setInverted(true);
	clipNode->setAlphaThreshold(0.0f);
	this->addChild(clipNode,100);


	auto newLayer = LayerColor::create(Color4B(0,150)); //添加灰色层
	clipNode->addChild(newLayer);

	auto nsprite = Sprite::create("ccb/scale-9-demo.png");
	nsprite->setPosition(ccp(300,200)); //娶到图形大小区域

	auto nsprite1 = Sprite::create("ccb/scale-9-demo.png");
	nsprite1->setPosition(ccp(300,200));
	this->addChild(nsprite1); //再该位置创建图形，且高亮
	
	clipNode->setStencil(nsprite);