Unity 之旋转

代码如下：

 1         bool RotateDelta(Vector3 direction)
 2         {
 3             direction.y = 0;
 4             if (direction == Vector3.zero)
 5                 return true;
 6             if (transform.forward == direction)
 7                 return true;
 8 
 9             Quaternion target = Quaternion.LookRotation(direction);
10             float angle = Quaternion.Angle(target, transform.rotation);
11             float t = Mathf.Clamp01(720f * Time.deltaTime / angle);
12             transform.rotation = Quaternion.Lerp(transform.rotation, target, t);
13             return t == 1;
14         }

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