cocos2d-x 场景淡出淡入效果的具体运用

if(((PmdInAllLayer*)this->getParent())->getPosition().x==-((this->_allMap->getTileSize().width*this->_allMap->getMapSize().width )-winSize.width))
			{   
				this->_roseLdsWorld2=RoseLdsWorld2::create();
			    CCDirector::sharedDirector()->replaceScene(CCTransitionFade::create(2,_roseLdsWorld2));
			}