cocos2d-x 2.0实现绘图功能实例-《你画你猜》--沈大海cocos2d-x教程14

#ifndef __GAME_SCENE_H__

#define __GAME_SCENE_H__

#include "cocos2d.h"

using namespace cocos2d;

class GameScene :

public cocos2d::CCLayerColor

{

public:

GameScene(void);

~GameScene(void);

cocos2d::CCArray * m_allPoint; //保存所有触摸过的点

public:

virtual bool init();

virtual void onEnter();

virtual void draw(); //绘图

/////图层事件处理

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

virtual void ccTouchMoved(CCTouch *pTouches, CCEvent *pEvent);

virtual void ccTouchEnded(CCTouch *pTouches, CCEvent *pEvent);

virtual void registerWithTouchDispatcher(void);

/////获取包含本层的窗口

static cocos2d::CCScene* scene();

void menuCloseCallback(CCObject* pSender);//菜单回掉

CREATE_FUNC(GameScene);

};

#endif



#include "GameScene.h"

#include "HelloWorldScene.h"

using namespace cocos2d;

GameScene::GameScene(void)

{}

GameScene::~GameScene(void)

{}

bool GameScene::init(){

CCLayerColor::init();

this->m_allPoint=CCArray::create();

m_allPoint->retain();

////////////返回游戏主界面

cocos2d::CCLabelTTF * lable=::CCLabelTTF::create("back","Arial",24);

CCMenuItemLabel * pmenu=CCMenuItemLabel::create(lable,this,menu_selector(GameScene::menuCloseCallback));

pmenu->setPosition(100,50);

CCMenu * menu=CCMenu::create(pmenu,NULL);

this->addChild(menu,1);

this->setTouchEnabled(true);//启动事件处理

return true;

}

void GameScene::onEnter(){//该方法暂时没有使用

CCLayerColor::onEnter();

} //开始绘制node

void GameScene::draw(){

CCLayerColor::draw();

::ccDrawColor4B(255,0,0,255);//设定颜色为红色

::glLineWidth(5); //线条宽度5像素

if (m_allPoint!=NULL){

int count=this->m_allPoint->count();

for(int i=0;i<count;i++)

{ CCPoint * p=(CCPoint*)(this->m_allPoint->objectAtIndex(i));

if(i==0)

ccDrawPoint(ccp(p->x,p->y));

else

{CCPoint * pstart=(CCPoint*)(this->m_allPoint->objectAtIndex(i-1));

::ccDrawLine(ccp(p->x,p->y),ccp(pstart->x,pstart->y ));

}

}

}

}

// there's no 'id' in cpp, so we recommand to return the exactly class pointer

CCScene* GameScene::scene(){

CCScene * scene=CCScene::create();

GameScene * gs=GameScene::create();

scene->addChild(gs,2);

return scene;

}

// a selector callback

void GameScene::menuCloseCallback(CCObject* pSender){

CCDirector::sharedDirector()->replaceScene(HelloWorld::scene());

}



//记录按下点

bool GameScene::ccTouchBegan(CCTouch *pTouche, CCEvent *pEvent){

this->m_allPoint->removeAllObjects();

// CCLayer::ccTouchBegan(pTouche,pEvent);

CCPoint *p=new CCPoint();

p->x=pTouche->getLocation( ).x ;

p->y=pTouche->getLocation().y;

this->m_allPoint->addObject(p);

p->release();

//CCLog("ccTouchesBegan%f,%f",p->x,p->y);

return true; //这里返回true才能处理移动

}

//移动的时候也要记录

void GameScene::ccTouchMoved(CCTouch *pTouche, CCEvent *pEvent){

//CCLog("ccTouchesMoved%f,%f",pTouche->getLocationInView().x,pTouche->getLocationInView().y); //该方法得到的是针对屏幕的坐标左上角0，0

// pTouche->getLocation()得到的是opengl的坐标

CCPoint *p=new CCPoint();

p->x=pTouche->getLocation( ).x ;

p->y=pTouche->getLocation().y;

this->m_allPoint->addObject(p);

p->release();

}

void GameScene::ccTouchEnded(CCTouch *pTouche, CCEvent *pEvent){

}

void GameScene::registerWithTouchDispatcher()

{

CCDirector* pDirector = CCDirector::sharedDirector();

pDirector->getTouchDispatcher()->addTargetedDelegate(this, 0, true);

}