请问捕鱼达人3鱼群运动时怎样实时改变鱼群运动方向 ？

Cocos2d-x
#1

自己也写了几个贝塞尔曲线，但鱼的方向老是对不好，这个怎么解？多谢

#2

用的是3D路径~

#3

哥，能说明白 点吗？急求

#4

刚想了下，他们用的是3d游戏，但我现在做的是2d的，不需要用到3d路径吧。我现在不知道鱼在游动的时候，方向怎么转

#5

我们重写了个CCRBezierBy

void CCRBezierBy::update(float time)
{
    if (m_pTarget)
    {
        float xa = 0;
        float xb = m_sConfig.controlPoint_1.x;
        float xc = m_sConfig.controlPoint_2.x;
        float xd = m_sConfig.endPosition.x;

        float ya = 0;
        float yb = m_sConfig.controlPoint_1.y;
        float yc = m_sConfig.controlPoint_2.y;
        float yd = m_sConfig.endPosition.y;

        float x = bezierat(xa, xb, xc, xd, time);
        float y = bezierat(ya, yb, yc, yd, time);

        CCPoint currentPos = m_pTarget->getPosition();

        CCPoint diff = ccpSub(currentPos, m_previousPosition);
        m_startPosition = ccpAdd( m_startPosition, diff);

        CCPoint newPos = ccpAdd( m_startPosition, ccp(x,y));

        CCPoint edss =ccpSub(newPos,currentPos);
        float angleRadians =ccpToAngle(edss);
        float angleDegrees = CC_RADIANS_TO_DEGREES(angleRadians);

        m_pTarget->setRotation(-1.0f*angleDegrees-90.0f);

        m_pTarget->setPosition(newPos);

        m_previousPosition = newPos;
    }
}


```

主要就是下面这段啦


CCPoint edss =ccpSub(newPos,currentPos);
float angleRadians =ccpToAngle(edss);
float angleDegrees = CC_RADIANS_TO_DEGREES(angleRadians);

m_pTarget->setRotation(-1.0f*angleDegrees-90.0f);


```

在这里设置精灵的角度，嗯，我们是初始造型是向下的， 所以这样算m_pTarget->setRotation(-1.0f*angleDegrees-90.0f);根据不同情况改下，应该就可以了