cocos2dx 3.2 裁剪节点 ClippingNode

效果1：

效果2：

代码：

//
//[1].背景图片
    Sprite* bg = Sprite::create("HelloWorld.png");
    bg->setPosition(visibleSize / 2);
    this->addChild(bg, -1);
 
 
//[2].创建主题文字 : gameTitle
    Sprite* gameTitle = Sprite::create("game_title.png");
 
    //获取尺寸大小
    Size clipSize = gameTitle->getContentSize();
 
 
//[3].创建底板的发光图片 : spark
    Sprite* spark = Sprite::create("spark.png");
    spark->setPosition(-clipSize.width, 0);
 
 
//[4].创建裁剪节点 : clippingNode
    ClippingNode* clippingNode = ClippingNode::create();
    clippingNode->setPosition(visibleSize / 2);
    this->addChild(clippingNode);
 
    clippingNode->setAlphaThreshold(0.05f); //设置alpha闸值
    clippingNode->setContentSize(clipSize); //设置尺寸大小
 
    clippingNode->setStencil(gameTitle);   //设置模板stencil
    clippingNode->addChild(gameTitle, 1);  //先添加标题,会完全显示出来,因为跟模板一样大小
    clippingNode->addChild(spark,2);       //会被裁减
 
 
//[5].左右移动spark
    MoveTo* moveAction = MoveTo::create(2.0f, Vec2(clipSize.width, 0));
    MoveTo* moveBackAction = MoveTo::create(2.0f, Vec2(-clipSize.width, 0));
    spark->runAction(RepeatForever::create(Sequence::create(moveAction, moveBackAction, NULL)));//
//[1].背景图片