cocos2dx 3.2 裁剪节点 ClippingNode(2)

1.4、设置触摸事件回调。当触摸点在底板区域内部，则“打洞”

//
void HelloWorld::onTouchesBegan(const std::vector& touches, Event *unused_event)
{
//[1].获取触点, 转换为相对holesClipper节点的 相对坐标
    Vec2 point = touches[0]->getLocation();
    point = holesClipper->convertToNodeSpace(point);
 
     
//[2].获取底板区域矩形Rect
    Sprite* content = (Sprite*)holesClipper->getChildByName("content");
    Size contentSize = content->getContentSize();
    Rect rect = Rect(-contentSize.width / 2, -contentSize.height / 2, contentSize.width, contentSize.height);
 
     
//[3].触摸点在底板内部, 进行"打洞"
    if (rect.containsPoint(point))
    {
        pokeHoleAtPoint(point);
    }
}
//

1.5、实现“打洞”操作函数

//
void HelloWorld::pokeHoleAtPoint(Vec2 point)
{
    CCLOG("Add a Hole!!!");
 
//[1].添加底板内容 : 一个洞的痕迹
    auto hole = Sprite::create("hole_effect.png");
    hole->setPosition(point);
    holes->addChild(hole);
 
 
//[2].添加模板内容 : 一个小洞
    auto holeStencil = Sprite::create("hole_stencil.png");
    holeStencil->setPosition(point);
    holesStencil->addChild(holeStencil);
 
 
//[3].动作效果 : 放大缩小
    holesClipper->runAction(Sequence::create(ScaleTo::create(0.05f, 1.05f), ScaleTo::create(0.05f, 1.0f), NULL));
}
//