Unity对象围绕力场弯曲

Question

我希望在下面的图片中看到塔楼受到力场的影响。

看起来很简单吧？

GameObject towers = GameObject.Find("towers");
GameObject ball = GameObject.Find ("ball");

foreach (Transform tower in towers.transform) {
    Vector3 heading = ball.transform.position - tower.position;
    float distance = heading.magnitude;
    Vector3 direction = heading.normalized;
    Vector3 newDir = Vector3.RotateTowards(ball.transform.position, heading, 1, 0.0F);
    tower.rotation = Quaternion.LookRotation(newDir);
    //Debug.DrawRay(ball.transform.position, newDir, Color.red);
}

结果如下：

后面的塔楼很不错但是前面的方向是错误的。发生了什么？另外，有没有办法控制塔架弯曲的程度，这取决于从球到塔架的距离？

Answer 1

这是一个解决方案，它使用AnimationCurve根据它们与你的球之间的距离来控制你的塔的旋转角度。

我的动画曲线有两个键：

1. （0,90）//意味着当球离球0个单位时，塔将旋转90°
2. （10,0）//意味着当距离球10个单位时，塔将旋转0°

public AnimationCurve effect;
private GameObject towers ;
private GameObject ball ;

private void Start()
{
    towers = GameObject.Find("towers");
    ball = GameObject.Find ("ball");
}

private void Update()
{
    foreach (Transform tower in towers.transform)
    {
        Vector3 direction = (ball.position - tower.position);
        Vector3 rotationAxis = Vector3.Cross( direction.normalized, Vector3.up );
        float angle = effect.Evaluate( direction.magnitude ) ;
        tower.rotation = Quaternion.AngleAxis( angle, rotationAxis );
        // If you want your towers to look at your ball :
        // tower.rotation = Quaternion.LookRotation( direction ) * Quaternion.Euler( -angle, 0, 0 );
    }
}