cocos2d-x——坐标系统

#include "HelloWorldScene.h"using namespace cocos2d;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();        CC_BREAK_IF(! layer);        // add layer as a child to scene        scene->addChild(layer);    } while (0);    // return the scene    return scene;}// on "init" you need to initialize your instancebool HelloWorld::init(){    bool bRet = false;    do     {        //////////////////////////////////////////////////////////////////////////        // super init first        //////////////////////////////////////////////////////////////////////////        CC_BREAK_IF(! CCLayer::init());        //////////////////////////////////////////////////////////////////////////        // add your codes below...        //////////////////////////////////////////////////////////////////////////        /*颜色涂层*/CCLayerColor* colorLayer = CCLayerColor::layerWithColor(ccc4f(255,255,0,255));//this->addChild(colorLayer);/*渐变色图层CCLayerGradient::layerWithColor(ccc4f(255,0,0,255),ccc4f(0,255,0,255),ccp(0.8,0.8))3个参数分别为：开始颜色、结束颜色、颜色改变的点需要注意的是颜色改变的点的两个参数都以比例的形式给出。如这里的ccp(0.8,0.8)中的0.8是指占x轴的0.8*/CCLayerGradient* gradientLayer = CCLayerGradient::layerWithColor(ccc4f(255,0,0,255),ccc4f(0,255,0,255),ccp(0.8,0.8));//this->addChild(gradientLayer);//CCLayerMultiplex* grounLayer = CCLayerMultiplex::layerWithLayers(colorLayer,gradientLayer);//this->addChild(grounLayer);//grounLayer->switchTo(1);//切换到索引为1的图层。(索引从0开始算)//grounLayer->switchToAndReleaseMe(1);//与上一个的不同之处在于这个切换后会释放该图层的空间,而且可能会产生异常/*CCLog():用于向控制台打印日志this->getAnchorPoint() :获取当前图层或精灵的锚点结论：图层或精灵（其他的也是这样，例如什么CCLayer）的默认锚点都是0.5、0.5*///CCSprite* sprite = CCSprite::spriteWithFile("CloseNormal.png");//CCLog("layer:(%f , %f)",this->getAnchorPoint().x,this->getAnchorPoint().y);//CCLog("sprite:(%f , %f)",sprite->getAnchorPoint().x,this->getAnchorPoint().y);CCLayerColor* colorLayer1 = CCLayerColor::layerWithColorWidthHeight(ccc4f(255,0,0,255),480,320);this->addChild(colorLayer1);CCLog("colorLayer = (%f , %f)",colorLayer1->getAnchorPoint().x,colorLayer1->getAnchorPoint().y);colorLayer1->setPosition(ccp(240,160));//这两行的意思是：采用锚点作为作用点，将作用点的位置设为100,100colorLayer1->setIsRelativeAnchorPoint(true);//如果不加这一行,那么意思就变成了“将当前作用点的位置设为100,100（默认是左下角）”colorLayer1->setAnchorPoint(ccp(0,0));//加上这一句话后,这三句话的意思就变成了：将锚点的坐标设为0,0；采用锚点作为作用点；将锚点移至240,160        bRet = true;    } while (0);    return bRet;}void HelloWorld::menuCloseCallback(CCObject* pSender){    // "close" menu item clicked    CCDirector::sharedDirector()->end();}