Cocos2d－x碰撞检查与消灭的实现

 #ifndef __HELLOWORLD_SCENE_H__
 #define __HELLOWORLD_SCENE_H__

 #include "cocos2d.h"
 using namespace cocos2d;

 class HelloWorld : public cocos2d::CCLayerColor
 {
 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();

     // a selector callback
     void menuCloseCallback(CCObject* pSender);

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

     void addTarget();
     void spriteMoveFinished(CCNode *sender);
     void gameLogic(cocos2d::CCTime dt);

     void ccTouchesEnded(CCSet *touches, CCEvent *event);

     CCArray *aarayTarget;//敌人
     CCArray *arrayProjectile;//飞镖
     void update(CCTime dt);
 };

 #endif // __HELLOWORLD_SCENE_H__

HelloWorldScence.cpp

 #include "HelloWorldScene.h"
 #include "SimpleAudioEngine.h"

 using namespace cocos2d;
 using namespace CocosDenshion;

 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 ( CCLayerColor::initWithColor(ccc4(255, 255, 255, 255)) )
     {

         CCSize winSize = CCDirector::sharedDirector()->getWinSize();//获取屏幕大小

         arrayProjectile = CCArray::create();
         aarayTarget = CCArray::create();

         float sprite_scale = 2.0;
         CCSprite *Player =  CCSprite::create("Player.png");
         Player->setScale(sprite_scale);
         Player->setPosition(ccp(Player->getContentSize().width*sprite_scale/2.0, winSize.height/2.0));
         this->addChild(Player);

         aarayTarget->retain();
         arrayProjectile->retain();

         this->schedule(schedule_selector(HelloWorld::gameLogic), 1.0);
         this->schedule(schedule_selector(HelloWorld::update));
         this->setTouchEnabled(true);

         return true;
     }
     else{
         return false;
     }


 }

 void HelloWorld::gameLogic(cocos2d::CCTime dt){
     this->addTarget();
 }



 void HelloWorld::addTarget(){

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

     CCSprite *target = CCSprite::create("Target.png");

     //随机位置
     int minY = target->getContentSize().height/2.0;
     int maxY = winSize.height - target->getContentSize().height/2.0;
     int rangeY = maxY - minY;
     int actualY = rand()%rangeY + minY;

     target->setPosition(ccp(winSize.width - target->getContentSize().width/2.0, actualY));
     target->setTag(1);
     this->addChild(target);
     aarayTarget->addObject(target);

     //随机速度
     float minDuration = 2.0;
     float maxDuration = 4.0;
     int rangeDuration = maxDuration - minDuration;
     float actualDuration = rand()%rangeDuration + minDuration;




     CCFiniteTimeAction *actionMove = CCMoveTo::create(actualDuration, ccp(0 - target->getContentSize().width/2.0, actualY));//0代表屏幕外，这句表示在3秒内从初始位置移动到屏幕外


     //增加一个回调函数，回收移动到屏幕外的精灵
     CCFiniteTimeAction *actionMoveDone = CCCallFuncN::create(this, callfuncN_selector(HelloWorld::spriteMoveFinished));
     target->runAction(CCSequence::create(actionMove,actionMoveDone,NULL));

 }

 void HelloWorld::spriteMoveFinished(cocos2d::CCNode *sender){
     CCSprite *sprite = (CCSprite *)sender;
    // this->removeChild(sprite, true);
     if (sprite->getTag() == 1) {
         aarayTarget->removeObject(sprite);//清除敌人
     }else if(sprite->getTag() == 2){
         arrayProjectile->removeObject(sprite);//清除飞镖
     }
 }


 //发射飞镖
 void HelloWorld::ccTouchesEnded(cocos2d::CCSet *touches, cocos2d::CCEvent *event){
     CCTouch *touch = (CCTouch *)touches->anyObject();
     CCPoint location = touch->getLocationInView();
     location = this->convertTouchToNodeSpace(touch);

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

     CCSprite *projectile = CCSprite::create("Projectile.png");
     projectile->setPosition(ccp(20, winSize.height/2));

     float offX = location.x - projectile->getPositionX();
     float offY = location.y - projectile->getPositionY();

     if (offX <= 0) {
         return;
     }
     projectile->setTag(2);
     this->addChild(projectile);
     arrayProjectile->addObject(projectile);

     float angle = offY/offX;
     float realX= winSize.width + projectile->getContentSize().width/2;
     float realY = realX * angle + projectile->getPositionY();

     CCPoint finalPosition = ccp(realX, realY);

     //获取飞镖飞行时间
     float length = sqrtf(realX *realX + realY*realY);
     float velocity = 480;
     float realMoveDuration = length/velocity;

     projectile->runAction(CCSequence::create(CCMoveTo::create(realMoveDuration, finalPosition),CCCallFuncN::create(this, callfuncN_selector(HelloWorld::spriteMoveFinished)),NULL));
 }

 //碰撞检测，消除飞镖和敌人
 void HelloWorld::update(cocos2d::CCTime dt){
     for (int i = 0; i < aarayTarget->count(); i++) {
         CCSprite *target = (CCSprite *)aarayTarget->objectAtIndex(i);
         for (int j = 0; j < arrayProjectile->count(); j++) {
             CCSprite *projectile = (CCSprite *)arrayProjectile->objectAtIndex(j);
             if (target->boundingBox().intersectsRect(projectile->boundingBox())) {
                 aarayTarget->removeObjectAtIndex(i);
                 arrayProjectile->removeObjectAtIndex(j);
                 this->removeChild(target);
                 this->removeChild(projectile);

                 break;
             }
         }
     }
 }



 void HelloWorld::menuCloseCallback(CCObject* pSender)
 {
     CCDirector::sharedDirector()->end();

 #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
     exit(0);
 #endif
 }