cocos2d实现刮奖效果

发布时间：2020-12-14 17:28:12 所属栏目：百科来源：网络整理

导读：[cpp] view plain copy bool HelloWorld::init() { if (!Layer::init()) return false ; } SizevisibleSize=Director::getInstance()-getVisibleSize(); autosprite=Sprite::create( "HelloWorld.png" ); sprite-setPosition(Vec2(visibleSize.width/2,visib

[cpp] 
    view plain 
    copy
boolHelloWorld::init()
{
if(!Layer::init())
returnfalse;
}
SizevisibleSize=Director::getInstance()->getVisibleSize();
autosprite=Sprite::create("HelloWorld.png");
sprite->setPosition(Vec2(visibleSize.width/2,visibleSize.height/2));
this->addChild(sprite);
dotNode=DrawNode::create();
dotNode->retain();
dotNode->drawDot(Point(0,0),4.0f,Color4F(255,255));
autopBg=Sprite::create("bg.png");//这个作为当“油漆层”
pBg->setAnchorPoint(Point(0.5,0.5));
pBg->setPosition(Vec2(visibleSize.width/2,visibleSize.height/2));
pRender=RenderTexture::create(visibleSize.width,visibleSize.height);
pRender->setPosition(Vec2(visibleSize.width/2,153);font-size:14px;border:none;background-color:inherit;">this->addChild(pRender);//渲染纹理层需加入该父节点层
pRender->begin();
pBg->visit();
pRender->end();
autolistener=EventListenerTouchOneByOne::create();
listener->onTouchBegan=CC_CALLBACK_2(HelloWorld::onTouchBegan,this);
listener->onTouchMoved=CC_CALLBACK_2(HelloWorld::onTouchMoved,153);font-size:14px;border:none;background-color:inherit;">this);
listener->onTouchEnded=CC_CALLBACK_2(HelloWorld::onTouchEnded,0);background-color:inherit;">_eventDispatcher->addEventListenerWithSceneGraphPriority(listener,153);font-size:14px;border:none;background-color:inherit;">true;
}

voidHelloWorld::onTouchMoved(Touch*touch,Event*unused_event)autotouchPoint=touch->getLocation();
dotNode->setPosition(touchPoint.x,touchPoint.y);
//设置混合模式
BlendFuncblendFunc={GL_ONE,GL_ZERO};
dotNode->setBlendFunc(blendFunc);
//将橡皮擦的像素渲染到画布上，与原来的像素进行混合
pRender->begin();
dotNode->visit();
pRender->end();
效果图：

（编辑：李大同）

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