【cocos2d-x 3.7 飞机大战】 决战南海I (四) 敌机管理

敌方飞机应该不定时的出现，有自己的生命周期、运动轨迹。这个类用来管理敌机的产生、移动、爆炸、销毁等。

敌机管理类主要函数例如以下

	//绑定控制器(更新分数)

	void bindController(Controller* controller);

	//依据分数决定加入敌机速度

	void addSpeed(float dt);

	// 加入敌机1

	void addEnemy1(float dt);

	// 加入敌机2

	void addEnemy2(float dt);

	// 加入敌机3

	void addEnemy3(float dt);

	// 加入敌机4

	void addEnemy4(float dt);

	// 敌机爆炸

	void blowupEnemy(Enemy* pEnemySprite);

	// 移除敌机pNode

	void removeEnemy(Node *pNode);		

其成员变量例如以下

Vector<Enemy*> vecEnemy;// 敌机容器。用于遍历碰撞问题

Controller* m_controlLayer;	//控制器

float m_fSpeed;	//加入敌机速度

float m_fEnemy1;

float m_fEnemy2;

float m_fEnemy3;

float m_fEnemy4;

敌机产生后。要先存储在容器中，通过容器来进行与子弹、我方飞机的碰撞检測，之后统一销毁。

还有就是，由于分数是要存储在数据库中的。所以我们用一个控制器来管理分数。对于我方飞机的触摸移动，也能够用控制器来控制。由于本游戏中的我方飞机操作简单，代码就嵌在了我方飞机类中。

(⊙o⊙)…扯远了。先介绍敌机管理类的实现。再讲控制器。

bool EnemyManager::init()

{

	if (!Layer::init())

	{

		return false;

	}

	cocos2d::Vector<SpriteFrame*> vecTemp;

	vecTemp.clear();

	// 敌机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);

	// 加入到AnimationCache。而且命名为Enemy1Blowup

	AnimationCache::getInstance()->addAnimation(pAnimation1, "Enemy1Blowup");

	// 敌机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");

	// 敌机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");

	// 敌机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");

	//依据当前分数来设定加入各种敌机的速度

	this->schedule(schedule_selector(EnemyManager::addSpeed), 0.1f);

	return true;

}

//绑定控制器(更新分数)

void EnemyManager::bindController(Controller* controller)

{

	this->m_controlLayer = controller;

	m_controlLayer->retain();

}

//依据分数决定加入敌机速度

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秒出现一架敌机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);

	// 设置运动轨迹 以及到终点时调用的函数

	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);

	//依据分数改变敌机数量

}

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);

	// 设置运动轨迹 以及到终点时调用的函数

	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);

	// 设置运动轨迹 以及到终点时调用的函数

	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);

}

// 加入敌机4

void EnemyManager::addEnemy4(float dt)

{

	Enemy *pEnemySprite = Enemy::create();

	pEnemySprite->setEnemyByType(Enemy4);

	pEnemySprite->setTag(Enemy4);

	this->addChild(pEnemySprite);

	vecEnemy.pushBack(pEnemySprite);

	// 设置运动轨迹 以及到终点时调用的函数

	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));

	// 按顺序运行 敌机飞到边缘。敌机移动结束

	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())

	{

		// 之前缓存的爆炸动作

		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。要移除敌机

	auto pActionDone = CallFuncN::create(CC_CALLBACK_0(EnemyManager::removeEnemy, this, pEnemySprite));

	Sequence* pSequence = Sequence::create(pAnimate, pActionDone, NULL);

	pEnemySprite->getSprite()->runAction(pSequence);

}

每种类型的敌机的爆炸代码比較短，直接在init()函数中进行初始化。为了使游戏难度不断添加，会依据分数来改变加入敌机的速度。敌机的运动轨迹大同小异，只是贝塞尔曲线看起来确实挺不错的。