我是新手cocos2d-x
,我需要你的帮助。
我需要使图层的触摸部分透明。
如何使图层的一部分透明?我曾想过使用ССClippingNode
,但我找不到示例或文档。
我使用 C++。谢谢。
在所有 cocos2d-x 版本中添加的项目 TestCpp 中,您可以找到 CCClipingNode 的示例。
如果您想使用 CCClipingNode 隐藏部分 CCNode(例如“图层”),您应该将图层添加到 CCClipingNode。
这是您可以粘贴到 HelloWorld init 中的示例:
bool HelloWorld::init()
{
if ( !CCLayer::init() )
{
return false;
}
CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();
addChild(CCLayerColor::create(ccc4(122, 144, 0, 255), visibleSize.width, visibleSize.height));
//this is the layer that we want to "cut"
CCLayer *layer = CCLayer::create();
CCSprite* pSprite = CCSprite::create("HelloWorld.png");
pSprite->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
layer->addChild(pSprite, 0);
//we need to create a ccnode, which will be a stencil for ccclipingnode, draw node is a good choice for that
CCDrawNode * stecil = CCDrawNode::create();
stecil->drawDot(ccp(visibleSize.width/2 + origin.x - 100, visibleSize.height/2 + origin.y), 30, ccc4f(0, 0, 0, 255));
stecil->drawSegment(ccp(0, 0), ccp(visibleSize.width, visibleSize.height), 20, ccc4f(0, 0, 0, 255));
//CCClipingNode show the intersection of stencil and theirs children
CCClippingNode *cliper = CCClippingNode::create(stecil);
//you want to hide intersection so we setInverted to true
cliper->setInverted(true);
cliper->addChild(layer);
addChild(cliper);
return true;
}