[cocos2dx学习笔记]用cocos2dx3.X完成塔防游戏王国保卫战--防御塔三之初级炮塔

与箭塔相比，箭塔一共需要只需要1-2张图片，除了弓箭手，塔是静止的，而炮塔相对比较复杂

从图中我们可以看出，炮塔的动作序列比较复杂，所以只需要将一个个动画序列分清楚，好在我们用的现成的图片资源，只要一个个通过addchild添加进去即可，然后用动画序列播放。

首先重载shoot

void BaseArtilleryTower::shoot(float dt)
{
    checkNearestMonster();
    if(nearestMonster!=NULL && nearestMonster->getCurrHp() > 0)
    {
	auto firePosition = nearestMonster->baseSprite->getPosition() - this->getParent()->getPosition();
	runAction(Sequence::create(
		CallFuncN::create(CC_CALLBACK_0(BaseArtilleryTower::fireAnimation,this)),CallFuncN::create(CC_CALLBACK_0(BaseArtilleryTower::fire,this,firePosition)),NULL));
    }
}

当射程范围内有敌人时，按顺序执行这个序列

先是左边的炮手蹲下并上抛这个动作，然后是炮弹飞到炮筒的动画

void BaseArtilleryTower::filledAnimation()
{
    leftShooter->runAction(Animate::create(AnimationCache::getInstance()->getAnimation(getName()+"leftShooter_throw")));
    c4->runAction(Animate::create(AnimationCache::getInstance()->getAnimation(getName()+"c4")));
}

之后执行fire将炮弹发射出去，基本原理和弓箭塔差不多，并且简单不少

void BaseArtilleryTower::fire(Point firePosition)
{
	auto currBullet = ArtilleryTowerBullet();

	auto shootVector = firePosition;

	Point highPoint = Point(shootVector.x,shootVector.y+200);

		
	ccBezierConfig bezier;

		
	bezier.controlPoint_1 = Point(currBullet->getPosition().x,currBullet->getPosition().y+200); 
	bezier.controlPoint_2 = Point(shootVector.x,shootVector.y+200);; 
	bezier.endPosition = shootVector;
	float endRotate;
	if(shootVector.x>currBullet->getPosition().x)
		endRotate = 180.0f;
	else
		endRotate = -180.0f;
	auto action = Spawn::create(BezierTo::create(1.0f,bezier),Rotateto::create(1.0f,endRotate),NULL);
	currBullet->setBulletAction(action);
	currBullet->shoot();
	runAction(Sequence::create(DelayTime::create(1.0f),CallFuncN::create(CC_CALLBACK_0(BaseArtilleryTower::filledAnimation,NULL));
	currBullet = NULL;
}

filledAnimation是右边的炮手和炮筒的动画这里就省略了

其中炮弹的动画与弓箭的动画区别就是旋转角度是转一圈，其他区别不大~

因为比较简单，这章就粗略介绍下