cocos2d-x学习笔记(4)--CCLayer背景绘制

cocos2d-x学习笔记(4)--CCLayer背景绘制

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step1:创建一个cocos2d-win32 application，并命名为simpleGame

step2:在HelloWorldScene.h中创建新类LayerBlack、LayerBlue和LayerBackground

class LayerBackground:public CCLayerColor{
public: LayerBackground();
 ~LayerBackground();
public: virtual void onEnter();};
 
class LayerCloud:public CCLayerColor{
public: LayerCloud();  ~LayerCloud();
public: virtual void onEnter();
};
class LayerHill:public CCLayerColor{
public: LayerHill();
 ~LayerHill();
public: virtual void onEnter();};
 
在HelloWorldScene.cpp中添加如下代码：
/************************************************************************//* class LayerCloud                                                                     *//************************************************************************/LayerCloud::LayerCloud(){
 
CCSize size = CCDirector::sharedDirector()->getWinSize();
this->initWithColor(ccc4(0,0,0,0));
CCSprite* pSpriteCloud = CCSprite::spriteWithFile("cloud.png");// CC_BREAK_IF(!pSpriteCloud); pSpriteCloud->setPosition(ccp(size.width/2,size.height/2)); addChild(pSpriteCloud);
}LayerCloud::~LayerCloud(){
}
void LayerCloud::onEnter(){ CCLayer::onEnter();
 }
/************************************************************************//* class LayerHill                                                                    *//************************************************************************/
LayerHill::LayerHill(){
 
CCSize size = CCDirector::sharedDirector()->getWinSize();
this->initWithColor(ccc4(0,0,0,0)); CCSprite* pSpriteHill = CCSprite::spriteWithFile("hill.png"); //CC_BREAK_IF(!pSpriteHill); pSpriteHill->setPosition(ccp(size.width/2,size.height/2)); addChild(pSpriteHill);
}
LayerHill::~LayerHill(){
}
void LayerHill::onEnter(){ CCLayer::onEnter();
}
/************************************************************************//* class LayerBackground                                                                    *//************************************************************************/
LayerBackground::LayerBackground (){
CCSize size = CCDirector::sharedDirector()->getWinSize();
CCLabelTTF* label = CCLabelTTF::labelWithString(m_strTitle.c_str(),"Arial", 32); addChild(label);
label->setPosition(ccp(size.width /2, size.height/2));
this->initWithColor(ccc4(255,255,255,255));
 }
LayerBackground ::~LayerBackground (){
}
void LayerBackground ::onEnter(){ CCLayer::onEnter();
 }
修改init()函数：
CCScene* HelloWorld::scene(){    CCScene * scene = NULL;    do     {        // 'scene' is an autorelease object        scene = CCScene::node();        CC_BREAK_IF(! scene);
        // 'layer' is an autorelease object        //HelloWorld *layer = HelloWorld::node();  LayerBackground* playerBack = new LayerBackground();  LayerCloud* playerCloud = new LayerCloud();  LayerHill* playerHill = new LayerHill();
        CC_BREAK_IF(! playerHill);  CC_BREAK_IF(!playerCloud);  CC_BREAK_IF(!playerBack);
        // add layer as a child to scene  //addChild中的第二个参数为背景的次序，LayerHill在LayerCloud的上面，即表面。        scene->addChild(playerHill, 2);  scene->addChild(playerCloud, 1);  scene->addChild(playerBack,0);
    } while (0);
    // return the scene    return scene;}
 
 

由于游戏中一个场景中的背景可能含有很多内容，若将全部内容放在同一个背景下，就会导致管理上的不方便，因此可以通过组合多个背景（Layer）来形成一个画面；来管理一个游戏场景

示意图：

通过两个背景的组合

最终得到如下效果

运行程序后会见到如下的画面：

 

 

 

 源代码下载地址：http://download.csdn.net/download/wen294299195/4525792