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

CCDirector::sharedDirector()->convertToUI();

CCDirector::sharedDirector()->convertToGL();

Coordinate.h

#ifndef __COORDINATE_H__

#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

Coordinate.cpp

#include "Coordinate.h"

#include "AppMacros.h"

CCScene * Coordinate::scene() {

scene = CCScene::create();

Coordinate * layer = create();

scene->addChild(layer);

return scene;

}

bool 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(0,150,150));

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

addChild(big);

CCSprite *little = create();

little->setcolor(ccYELLOW);

little->

little->

little->

//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(),0); Font-family:新宋体; Font-size:9.5pt">getpositionY());

CCPoint toWorld = big->convertToWorldspace(little->getposition());

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

CCSprite *little2 = create();

little2->setcolor(ccGREEN);

little2->

little2->

little2->

addChild(little2);

CCPoint toNode = big->convertToNodeSpace(little2->"little2 x = %f,little2->getpositionY());

"toNode x = %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,by2,138); Font-family:新宋体; Font-size:9.5pt">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 *lby2 = (CCMoveBy *)lby->reverse();

CCSequence *lseq = create(lby,lby2,138); Font-family:新宋体; Font-size:9.5pt">NulL);

little->create(lseq));

return true;

}

//触摸事件开始

bool CCEvent *pEvent)

{

"cctouchBegan");

//基于OpenGL的世界坐标

CCPoint pGl = ptouch->getLocation();

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

//基于UI屏幕的坐标

CCPoint pUi = ptouch->getLocationInVIEw();

"UI:x = %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);

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

//将屏幕坐标的转换成为本地坐标

CCPoint toGL = convertToGL(pUi);

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

//转换成节点坐标

CCPoint node = this->convertToNodeSpace(pGl);

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

return false;

}

运行结果：