矩形碰撞

新建工程，RectCollision

修改HelloWorldScene.h

#ifndef __HELLOWORLD_SCENE_H__

#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

using namespace cocos2d;

class HelloWorld : public cocos2d::CCLayer

{

public:

    // Method 'init' in cocos2d-x returns bool, instead of 'id' in cocos2d-iphone (an object pointer)

    virtual bool init();

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

    static cocos2d::CCScene* scene();    

    

    // preprocessor macro for "static create()" constructor ( node() deprecated )

    CREATE_FUNC(HelloWorld);

    

    virtual void onEnter();

    virtual void onExit();

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

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

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

    

    bool isRectCollision(CCRect rect1,CCRect rect2);

};

#endif // __HELLOWORLD_SCENE_H__

修改HelloWorldScene.cpp

#include "HelloWorldScene.h"

#include "SimpleAudioEngine.h"

using namespace cocos2d;

using namespace CocosDenshion;

#define collisionMacro 2

CCScene* HelloWorld::scene()

{

    // 'scene' is an autorelease object

    CCScene *scene = CCScene::create();

    

    // 'layer' is an autorelease object

    HelloWorld *layer = HelloWorld::create();

    // add layer as a child to scene

    scene->addChild(layer);

    // return the scene

    return scene;

}

// on "init" you need to initialize your instance

bool HelloWorld::init()

{

    //////////////////////////////

    // 1. super init first

    if ( !CCLayer::init() )

    {

        return false;

    }

    CCLayerColor *colorLayer=CCLayerColor::create(ccc4(255, 255, 255, 255),480,320);

    addChild(colorLayer);

    

    CCLabelTTF *pLabel=CCLabelTTF::create("~还米有碰撞", "Thonburi", 24);

    pLabel->setColor(ccc3(255, 0, 0));

    CCSize size=CCDirector::sharedDirector()->getWinSize();

    pLabel->setPosition(ccp(size.width*0.5,size.height-50));

    this->addChild(pLabel,1,900);

    

    CCSprite *sp1=CCSprite::create("rect1.png");

    sp1->setPosition(ccp(100,230));

    addChild(sp1,0,921);

    

    CCSprite *sp2=CCSprite::create("rect2.png");

    sp2->setPosition(ccp(240, 140));

    addChild(sp2,0,922);

       

    return true;

}

void HelloWorld::onEnter()

{

    CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, false);

    CCLayer::onEnter();

}

void HelloWorld::onExit()

{

    CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);

    CCLayer::onExit();

}

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

{

    CCSprite *sp1=(CCSprite*) this->getChildByTag(921);

    sp1->setPosition(pTouch->getLocation());

    return true;

}

void HelloWorld::ccTouchMoved(CCTouch *pTouch,CCEvent *pEvent)

{

    CCSprite *sp1=(CCSprite*) this->getChildByTag(921);

    sp1->setPosition(pTouch->getLocation());

    

    CCSprite *sp2=(CCSprite*) this->getChildByTag(922);

    CCLabelTTF *pLabel=(CCLabelTTF*) this->getChildByTag(900);

    

    switch (collisionMacro) {

        case 1:

        {

            //利用自定义函数碰撞

            if (this->isRectCollision(CCRectMake(sp1->getPositionX(), sp1->getPositionY(), sp1->getContentSize().width, sp1->getContentSize().height), CCRectMake(sp2->getPositionX(), sp2->getPositionY(), sp2->getContentSize().width, sp2->getContentSize().height))) {

                pLabel->setString("碰撞拉！");

            }

            else

            {

                 pLabel->setString("还没有碰撞！");

            }

        }

            break;

        case 2:

        {

            //利用intersectsRect函数碰撞

            if (sp1->boundingBox().intersectsRect(sp2->boundingBox())) {

                pLabel->setString("碰撞拉！");

            }

            else

            {

                pLabel->setString("还没有碰撞！");

            }

        }

            break;

            

        default:

            break;

    }

    

}

void HelloWorld::ccTouchEnded(CCTouch *pTouch,CCEvent *pEvent)

{

    

}

bool HelloWorld::isRectCollision(CCRect rect1,CCRect rect2)

{

    float x1=rect1.origin.x;

    float y1=rect1.origin.y;

    float w1=rect1.size.width;

    float h1=rect1.size.height;

    

    float x2=rect2.origin.x;

    float y2=rect2.origin.y;

    float w2=rect2.size.width;

    float h2=rect2.size.height;

    

    if (x1+w1*0.5<x2-w2*0.5)

    {

        return false;

    }

    else if(x1-w1*0.5>x2+w2*0.5)

    {

        return false;

    }

    else if(y1+h1*0.5<y2-h2*0.5)

    {

        return false;

    }

    else if(y1-h1*0.5>y2+h2*0.5)

    {

        return false;

    }

    return true;    

}