(四) 敵機管理 · cocos2d-x游戲實戰-決戰南海

敵方飛機應該不定時的出現，有自己的生命周期、運動軌跡。這個類用來管理敵機的產生、移動、爆炸、銷毀等。敵機管理類主要函數如下 ~~~ //綁定控制器(更新分數) void bindController(Controller* controller); //根據分數決定添加敵機速度 void addSpeed(float dt); // 添加敵機1 void addEnemy1(float dt); // 添加敵機2 void addEnemy2(float dt); // 添加敵機3 void addEnemy3(float dt); // 添加敵機4 void addEnemy4(float dt); // 敵機爆炸 void blowupEnemy(Enemy* pEnemySprite); // 移除敵機pNode void removeEnemy(Node *pNode); ~~~ 其成員變量如下 ~~~ Vector<Enemy*> vecEnemy;// 敵機容器，用于遍歷碰撞問題 Controller* m_controlLayer; //控制器 float m_fSpeed; //添加敵機速度 float m_fEnemy1; float m_fEnemy2; float m_fEnemy3; float m_fEnemy4; ~~~ 敵機產生后，要先存儲在容器中，通過容器來進行與子彈、我方飛機的碰撞檢測，之后統一銷毀。還有就是，因為分數是要存儲在數據庫中的，所以我們用一個控制器來管理分數。對于我方飛機的觸摸移動，也可以用控制器來控制，由于本游戲中的我方飛機操作簡單，代碼就嵌在了我方飛機類中。(⊙o⊙)…扯遠了，先介紹敵機管理類的實現，再講控制器。 ~~~ bool EnemyManager::init() { if (!Layer::init()) { return false; } cocos2d::Vector<SpriteFrame*> vecTemp; vecTemp.clear(); // 敵機1爆炸 for (int i = 0; i < 4; i++) { auto blowUpName = __String::createWithFormat("enemy1_down%d.png", i + 1); auto tempBlowUp = SpriteFrameCache::getInstance()->getSpriteFrameByName( blowUpName->getCString()); vecTemp.pushBack(tempBlowUp); } Animation* pAnimation1 = Animation::createWithSpriteFrames(vecTemp, 0.1f); // 添加到AnimationCache，并且命名為Enemy1Blowup AnimationCache::getInstance()->addAnimation(pAnimation1, "Enemy1Blowup"); // 敵機2爆炸 vecTemp.clear(); for (int i = 0; i < 4; i++) { auto blowUpName = __String::createWithFormat("enemy2_down%d.png", i + 1); auto tempBlowUp = SpriteFrameCache::getInstance()->getSpriteFrameByName( blowUpName->getCString()); vecTemp.pushBack(tempBlowUp); } Animation *pAnimation2 = Animation::createWithSpriteFrames(vecTemp,0.1f); AnimationCache::getInstance()->addAnimation(pAnimation2, "Enemy2Blowup"); // 敵機3爆炸 vecTemp.clear(); for (int i = 0; i < 4; i++) { auto blowUpName = __String::createWithFormat("enemy3_down%d.png", i + 1); auto tempBlowUp = SpriteFrameCache::getInstance()->getSpriteFrameByName( blowUpName->getCString()); vecTemp.pushBack(tempBlowUp); } Animation *pAnimation3 = Animation::createWithSpriteFrames(vecTemp,0.1f); AnimationCache::getInstance()->addAnimation(pAnimation3, "Enemy3Blowup"); // 敵機4爆炸 vecTemp.clear(); for (int i = 0; i < 4; i++) { auto blowUpName = __String::createWithFormat("enemy4_down%d.png", i + 1); auto tempBlowUp = SpriteFrameCache::getInstance()->getSpriteFrameByName( blowUpName->getCString()); vecTemp.pushBack(tempBlowUp); } Animation *pAnimation4 = Animation::createWithSpriteFrames(vecTemp, 0.1f); AnimationCache::getInstance()->addAnimation(pAnimation4, "Enemy4Blowup"); //根據當前分數來設定添加各種敵機的速度 this->schedule(schedule_selector(EnemyManager::addSpeed), 0.1f); return true; } //綁定控制器(更新分數) void EnemyManager::bindController(Controller* controller) { this->m_controlLayer = controller; m_controlLayer->retain(); } //根據分數決定添加敵機速度 void EnemyManager::addSpeed(float dt) { m_fSpeed = m_controlLayer->getSaveData()->getScore() / 1000 + 1; this->schedule(schedule_selector(EnemyManager::addEnemy1), m_fEnemy1 / m_fSpeed); // 每1秒出現一架敵機1 this->schedule(schedule_selector(EnemyManager::addEnemy2), m_fEnemy2 / m_fSpeed); this->schedule(schedule_selector(EnemyManager::addEnemy3), m_fEnemy3 / m_fSpeed); this->schedule(schedule_selector(EnemyManager::addEnemy4), m_fEnemy4 / m_fSpeed); } void EnemyManager::addEnemy1(float dt) { Size size = Director::getInstance()->getVisibleSize(); Enemy *pEnemySprite = Enemy::create(); pEnemySprite->setEnemyByType(Enemy1); pEnemySprite->setTag(Enemy1); this->addChild(pEnemySprite); vecEnemy.pushBack(pEnemySprite); // 設置運動軌跡以及到終點時調用的函數 ccBezierConfig m_bezier; m_bezier.controlPoint_1 = ccp(size.width/20, size.height*0.7); m_bezier.controlPoint_2 = ccp(size.width/2, size.height/2); m_bezier.endPosition = ccp(size.width*0.9, size.height*0.9); auto actionMove = BezierTo::create(2.0f, m_bezier); auto actionDone = CallFuncN::create(CC_CALLBACK_1(EnemyManager::removeEnemy, this)); Sequence* sequence = Sequence::create(actionMove, actionDone, NULL); pEnemySprite->runAction(sequence); //根據分數改變敵機數量 } void EnemyManager::addEnemy2(float dt) { Size size = Director::getInstance()->getVisibleSize(); Enemy *pEnemySprite = Enemy::create(); pEnemySprite->setEnemyByType(Enemy2); pEnemySprite->setTag(Enemy2); this->addChild(pEnemySprite); vecEnemy.pushBack(pEnemySprite); // 設置運動軌跡以及到終點時調用的函數 ccBezierConfig m_bezier; m_bezier.controlPoint_1 = ccp(40, 500); m_bezier.controlPoint_2 = ccp(250, 400); m_bezier.endPosition = ccp(400, 700); auto actionMove = BezierTo::create(4.0f, m_bezier); auto actionDone = CallFuncN::create(CC_CALLBACK_1(EnemyManager::removeEnemy, this)); Sequence* sequence = Sequence::create(actionMove, actionDone, NULL); pEnemySprite->runAction(sequence); } void EnemyManager::addEnemy3(float dt) { Size size = Director::getInstance()->getVisibleSize(); Enemy *pEnemySprite = Enemy::create(); pEnemySprite->setEnemyByType(Enemy3); pEnemySprite->setTag(Enemy3); this->addChild(pEnemySprite); vecEnemy.pushBack(pEnemySprite); // 設置運動軌跡以及到終點時調用的函數 ccBezierConfig m_bezier; m_bezier.controlPoint_1 = ccp(60, 550); m_bezier.controlPoint_2 = ccp(100, 400); m_bezier.endPosition = ccp(400, 700); auto actionMove = BezierTo::create(6.0f, m_bezier); auto actionDone = CallFuncN::create(CC_CALLBACK_1(EnemyManager::removeEnemy, this)); Sequence* sequence = Sequence::create(actionMove, actionDone, NULL); pEnemySprite->runAction(sequence); } // 添加敵機4 void EnemyManager::addEnemy4(float dt) { Enemy *pEnemySprite = Enemy::create(); pEnemySprite->setEnemyByType(Enemy4); pEnemySprite->setTag(Enemy4); this->addChild(pEnemySprite); vecEnemy.pushBack(pEnemySprite); // 設置運動軌跡以及到終點時調用的函數 ccBezierConfig m_bezier; m_bezier.controlPoint_1 = ccp(80, 650); m_bezier.controlPoint_2 = ccp(350, 450); m_bezier.endPosition = ccp(400, 700); auto actionMove = BezierTo::create(8.0f, m_bezier); auto actionDone = CallFuncN::create(CC_CALLBACK_1(EnemyManager::removeEnemy, this)); // 按順序執行敵機飛到邊緣，敵機移動結束 Sequence* sequence = Sequence::create(actionMove, actionDone, NULL); pEnemySprite->runAction(sequence); } void EnemyManager::removeEnemy(Node *pNode) { Enemy* enemy = (Enemy*)pNode; if (enemy != NULL) { this->removeChild(enemy, true); vecEnemy.eraseObject(enemy); } } void EnemyManager::blowupEnemy(Enemy* pEnemySprite) { auto saveData = m_controlLayer->getSaveData(); Animation *pAnimation = NULL; if (Enemy1 == pEnemySprite->getTag()) { // 之前緩存的爆炸動作 pAnimation = AnimationCache::getInstance()->getAnimation("Enemy1Blowup"); if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { } if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/enemy1_down.wav"); } saveData->setScore(saveData->getScore() + ENEMY1_SCORE); } else if (Enemy2 == pEnemySprite->getTag()) { pAnimation = AnimationCache::getInstance()->getAnimation("Enemy2Blowup"); if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/enemy2_down.wav"); } saveData->setScore(saveData->getScore() + ENEMY2_SCORE); } else if (Enemy3 == pEnemySprite->getTag()) { pAnimation = AnimationCache::getInstance()->getAnimation("Enemy3Blowup"); if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/enemy3_down.wav"); } saveData->setScore(saveData->getScore() + ENEMY3_SCORE); } else if (Enemy4 == pEnemySprite->getTag()) { pAnimation = AnimationCache::getInstance()->getAnimation("Enemy4Blowup"); if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/enemy4_down.wav"); } saveData->setScore(saveData->getScore() + ENEMY4_SCORE); } else { return; } Animate *pAnimate = Animate::create(pAnimation); // 爆炸完，要移除敵機 auto pActionDone = CallFuncN::create(CC_CALLBACK_0(EnemyManager::removeEnemy, this, pEnemySprite)); Sequence* pSequence = Sequence::create(pAnimate, pActionDone, NULL); pEnemySprite->getSprite()->runAction(pSequence); } ~~~ 每種類型的敵機的爆炸代碼比較短，直接在init()函數中進行初始化。為了使游戲難度不斷增加，會根據分數來改變添加敵機的速度。敵機的運動軌跡大同小異，不過貝塞爾曲線看起來確實挺不錯的。