使用TileMap制作游戏，在cocos2d-x中使用（三）

本篇博客出自阿修罗道，转载请注明出处：http://blog.csdn.net/fansongy/article/details/8881664

游戏么，得有输赢、敌人。

地图编辑的一些方法，传送门：http://www.cnblogs.com/andyque/archive/2011/05/07/2039481.html

下面加入敌人：

void HelloWorld::addEnemy(int x,int y)
{
	CCSprite* enemy = CCSprite::create("enemy1.png");
	enemy->setPosition(ccp(x,y));
	addChild(enemy);
	//moveEnemy(enemy);
	m_enemies->addObject(enemy);
}

接下来使敌人移动，这里跟官方的不太一样。我采用的是在屏幕上显示的怪能移动。

做出来的有点小问题：isRunning函数似乎有问题，不能用。嫌麻烦自己没写类。

所以有个小Bug，有兴趣的读者可以改改，自己写个子类，然后设置个动没动的标志。

void HelloWorld::moveEnemy(CCSprite* enemy)
{ 
	CCPoint diff = ccpSub(m_player->getPosition(),enemy->getPosition());
	float angleRadians = atanf((float)diff.y / (float)diff.x);
	float angleDegrees = CC_RADIANS_TO_DEGREES(angleRadians);
	float cocosAngle =-1* angleDegrees;
	if (diff.x <0) {
		cocosAngle +=180;
	}
	enemy->setRotation(cocosAngle);	

	int x = m_player->getPosition().x;
	int y = m_player->getPosition().y;
	CCActionInterval* move = CCMoveBy::create(3.0f, ccpSub(m_player->getPosition(),enemy->getPosition()));
	enemy->runAction(CCSequence::create(move,
		CCCallFuncN::create(this,callfuncN_selector(HelloWorld::enemyMoveFinished)),NULL));
}

循环的回调是必要的，因为玩家的位置会更改，目标坐标会改变。

//此处如此设计因为玩家位置会发生变化，需要重复获取
void HelloWorld::enemyMoveFinished(CCNode* node)
{
	CCSprite* enemy = (CCSprite*)node;
	moveEnemy(enemy);
}

void HelloWorld::checkMoveEnemy(CCPoint center)
{
	CCSize winSize = CCDirector::sharedDirector()->getWinSize();
	center = convertToNodeSpace(center);
	CCRect screen = CCRectMake(center.x-winSize.width/2,center.y-winSize.height/2,winSize.width,winSize.height);
	CCObject* e = NULL;
	CCARRAY_FOREACH(m_enemies,e)
	{
		CCSprite* enemy =  dynamic_cast<CCSprite*>(e);
		CCPoint temp = enemy->getPosition();
		CCPoint pos = convertToNodeSpace(temp);  

		if(screen.containsPoint(pos))
		{
			//此处会有重复调用的问题，即对已经移动的怪调用runAction
			//if(enemy->isRunning()) //这个函数不能用？
			moveEnemy(enemy);
		}
	}
}

有怪了就得打，接下来是发射飞镖。

因为是触控，没法用键盘那么高端，这里采用切换模式的方法，即移动和发射飞镖两种模式切换。

切换的显示要用CCMenuItemToggle来做，把它放在CCMenu中，再放在ScoreLayer中。

发射飞镖就用之前那个最简易的忍者游戏的代码就行。

void HelloWorld::sendProjectile(CCSprite* projectile,CCPoint pos)
{

	int realX;

	CCPoint diff = ccpSub(pos, m_player->getPosition());
	if (diff.x >0)
	{
		realX = (m_tileMap->getContentSize().width) +
			(projectile->getContentSize().width/2);
	} 
	else {
		realX =-(m_tileMap->getContentSize().width) -
			(projectile->getContentSize().width/2);
	}
	float ratio = (float) diff.y / (float) diff.x;
	int realY = ((realX - projectile->getPositionX()) * ratio) + projectile->getPositionY();
	CCPoint realDest = ccp(realX, realY);

	// Determine the length of how far we're shooting
	int offRealX = realX - projectile->getPositionX();
	int offRealY = realY - projectile->getPositionY();
	float length = sqrtf((offRealX*offRealX) + (offRealY*offRealY));
	float velocity =480/1; // 480pixels/1sec
	float realMoveDuration = length/velocity;

	CCActionInterval* throwProjectile = CCMoveTo::create(realMoveDuration,realDest);
	projectile->runAction(CCSequence::create(throwProjectile,
		CCCallFuncN::create(this,callfuncN_selector(HelloWorld::projectileMoveFinished)),NULL));

}

void HelloWorld::projectileMoveFinished(CCNode* object)
{
	CCSprite* p = (CCSprite* )object;
	if(p)
	{
		removeChild(p,true);
		m_projectiles->removeObject(p);
	}
}

碰撞检测也一样，检查飞镖与敌人是否相遇，另外要加入敌人与玩家相遇的逻辑。

void HelloWorld::checkHit(float dt)
{
	CCArray* projectilesToDelete = new CCArray;
	CCArray* targetToDelete = new CCArray;
	CCObject* it = NULL;
	CCObject* jt = NULL;
	CCRect playerRect = CCRectMake(
				m_player->getPositionX() - m_player->getContentSize().width/2,
				m_player->getPositionY() - m_player->getContentSize().height/2,
				m_player->getContentSize().width,
				m_player->getContentSize().height);

	CCARRAY_FOREACH(m_projectiles,it)
	{
		CCSprite * projectile = dynamic_cast<CCSprite*>(it);
		CCRect projectileRect = CCRectMake(
			projectile->getPositionX() - projectile->getContentSize().width/2,
			projectile->getPositionY() - projectile->getContentSize().height/2,
			projectile->getContentSize().width,
			projectile->getContentSize().height);
		CCARRAY_FOREACH(m_enemies,jt)
		{
			CCSprite* target = dynamic_cast<CCSprite*>(jt);
			CCRect targetRect = CCRectMake(
				target->getPositionX() - target->getContentSize().width/2,
				target->getPositionY() - target->getContentSize().height/2,
				target->getContentSize().width,
				target->getContentSize().height);
			if(projectileRect.intersectsRect(targetRect))
			{
				targetToDelete->addObject(target);
			}
			
		}
		CCARRAY_FOREACH(targetToDelete,jt)
		{
			CCSprite* delTarget = dynamic_cast<CCSprite*>(jt);
			m_enemies->removeObject(delTarget,true);
			this->removeChild(delTarget,true);
		}
		if(targetToDelete->count() >0)
		{
			projectilesToDelete->addObject(projectile);
		}
		targetToDelete->removeAllObjects();
	}
	CCARRAY_FOREACH(projectilesToDelete,it)
	{
		CCSprite* delProject = dynamic_cast<CCSprite*>(it);
		m_projectiles->removeObject(delProject);
		this->removeChild(delProject,true);
	}
	CCARRAY_FOREACH(m_enemies,jt)
	{
		CCSprite* target = dynamic_cast<CCSprite*>(jt);
		CCRect targetRect = CCRectMake(
				target->getPositionX() - target->getContentSize().width/2,
				target->getPositionY() - target->getContentSize().height/2,
				target->getContentSize().width,
				target->getContentSize().height);

		if(playerRect.intersectsRect(targetRect))
		{
			GameOverSecne *gameOverScene = GameOverSecne::create();
			gameOverScene->getLayer()->getLabel()->setString("You Lose!");
			CCDirector::sharedDirector()->replaceScene(gameOverScene);
		}
	}
	targetToDelete->release();
	projectilesToDelete->release();
}

最后加上输赢界面：吃掉西瓜就赢，碰到怪物就输。

用的之前简易忍者游戏的那个GameOverScene。具体可以看我的源码。

编译运行吧，少年。

我感觉我这版游戏，关卡设计还是有点难的，打了半天才赢...

等过CSDN审核，上代码：