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cocos2dx 3.x ClippingNode裁剪图形,
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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);