cocos2d-x 矩形碰撞检测

bool HelloWorld::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !CCLayer::init() )
    {
        return false;
    }

    
    CCSprite* sp1 = CCSprite::create("Icon.png");
    sp1->setPosition(ccp(200, 160));
    addChild(sp1, 0, 1);
    
    CCSprite* sp2 = CCSprite::create("Icon.png");
    sp2->setPosition(ccp(300, 160));
    addChild(sp2, 0, 2);
    
    CCLabelTTF* label = CCLabelTTF::create("没有发生碰撞", "Thonburi",24);
    label->setPosition(ccp(240, 280));
    addChild(label, 1, 3);
    
    
    return true;
}


bool HelloWorld::ccTouchBegan(cocos2d::CCTouch *touch, cocos2d::CCEvent *event)
{
    CCSprite* sp1 = (CCSprite*)getChildByTag(1);
    sp1->setPosition(touch->getLocation());
    return true;
}

void HelloWorld::ccTouchMoved(cocos2d::CCTouch *touch, cocos2d::CCEvent *event)
{
    CCSprite* sp1 = (CCSprite*) getChildByTag(1);
    sp1->setPosition(touch->getLocation());
    
    CCSprite* sp2 = (CCSprite*)getChildByTag(2);
    
    CCLabelTTF* label = (CCLabelTTF*) getChildByTag(3);
    
    //碰撞检测，矩形碰撞
    if((sp1->boundingBox()).intersectsRect(sp2->boundingBox()))
    {
        label->setString("碰撞啦");
    }else
    {
        label->setString("还是没有碰撞");
    }

}

void HelloWorld::ccTouchEnded(cocos2d::CCTouch *touch, cocos2d::CCEvent *event)
{
    
}

void HelloWorld::onEnter()
{
    CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, true);
    CCLayer::onEnter();
}


void HelloWorld::onExit()
{
    CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
    CCLayer::onExit();
}