2.cocos2d-x坐标体系（UI坐标系，GL坐标系，本地坐标，世界坐标，节点坐标）

图： UI坐标系

图： GL坐标系

#define
__COORDINATE_H__

#include
"cocos2d.h"

USING_NS_CC;

//坐标体系

class
Coordinate :public
CCLayer

{

public:

static
CCScene *
scene();

CREATE_FUNC(Coordinate);

bool
init();

//触摸事件开始的一个事件，第二个参数只是为了做苹果的兼容才保留的

virtual
bool
ccTouchBegan(CCTouch
*pTouch,
CCEvent *pEvent);

};

#endif

#include
"AppMacros.h"

CCScene *
Coordinate::scene()
{

CCScene *
scene =
CCScene::create();

Coordinate *
layer =
Coordinate::create();

scene->addChild(layer);

return
scene;

}

bool
Coordinate::init()

{

CCLayer::init();

//打开触摸开关

setTouchEnabled(true);

//下面的kCCTouchesOneByOne是一个枚举：

//typedef enum {

// 
kCCTouchesAllAtOnce,

// 
kCCTouchesOneByOne,

//} ccTouchesMode;

setTouchMode(kCCTouchesOneByOne);

//创建一个精灵

CCSprite *big
= CCSprite::create();

big->setColor(ccRED);

//设置锚点

big->setAnchorPoint(ccp(0,
0));

//表示的是一个矩形,CCRectMake是一个宏

big->setTextureRect(CCRectMake(0,0,150,150));

big->setPosition(ccp(100,100));

addChild(big);

CCSprite *little
= CCSprite::create();

little->setColor(ccYELLOW);

little->setAnchorPoint(ccp(0,0));

little->setTextureRect(CCRectMake(0,
0, 50, 50));

little->setPosition(ccp(100,100));

//从下面可以知道一个精灵中可以添加另外一个精灵

big->addChild(little);

CCLog("little
x = %f,y = %f",
little->getPositionX(),
little->getPositionY());

CCPoint
toWorld =
big->convertToWorldSpace(little->getPosition());

CCLog("toWorld
x = %f,y=%f",
toWorld.x,
toWorld.y);

CCSprite *little2
= CCSprite::create();

little2->setColor(ccGREEN);

little2->setAnchorPoint(ccp(0,
0));

little2->setTextureRect(CCRectMake(0,0,50,50));

little2->setPosition(ccp(0,0));

addChild(little2);

CCPoint
toNode =
big->convertToNodeSpace(little2->getPosition());

CCLog("little2
x = %f,y = %f",
little2->getPositionX(),
little2->getPositionY());

CCLog("toNode
x = %f,y = %f",
toNode.x,
toNode.y);

CCMoveBy *by
= CCMoveBy::create(2,ccp(200,0));

CCMoveBy *by2
= (CCMoveBy *)by->reverse();

//最后一个NULL是一个哨兵

CCSequence *seq
= CCSequence::create(by,
by2,
NULL);

big->runAction(CCRepeatForever::create(seq));

//第一个参数是：duration

//第二个参数是：移动位置.表示上下移动

CCMoveBy *lby
= CCMoveBy::create(2,
ccp(0, -100));

CCMoveBy *lby2
= (CCMoveBy *)lby->reverse();

CCSequence *lseq
= CCSequence::create(lby,
lby2,
NULL);

little->runAction(CCRepeatForever::create(lseq));

return
true;

}

//触摸事件开始

bool
Coordinate::ccTouchBegan(CCTouch
*pTouch,
CCEvent *pEvent)

{

CCLog("ccTouchBegan");

//基于OpenGL的世界坐标

CCPoint
pGl =
pTouch->getLocation();

CCLog("GL:x
= %f,y = %f",
pGl.x,
pGl);

//基于UI屏幕的坐标

CCPoint
pUi =
pTouch->getLocationInView();

CCLog("UI:x
= %f,y = %f",
pUi.x,
pUi.y);

//将基于GL的坐标转换成为UI的屏幕坐标

CCPoint
toUi =
CCDirector::sharedDirector()->convertToUI(pGl);

CCLog("ToUix
= %f ,y = %f",
toUi.x,
toUi.y);

//将屏幕坐标的转换成为本地坐标

CCPoint
toGL =
CCDirector::sharedDirector()->convertToGL(pUi);

CCLog("ToGLx
= %f,y=%f",
toGL.x,
toGL.y);

//转换成节点坐标

CCPoint
node =
this->convertToNodeSpace(pGl);

CCLog("Node:x
= %f,y = %f",
node.x,
node.y);

return
false;

}