ylsj/Assets/Scripts/Tools/EffectComponent/TransformRotation.cs

using UnityEngine;
/// <summary>
/// </summary>
public class TransformRotation : MonoBehaviour
{
    public enum RotationType
    {
        One, Two, Three
    }
    public RotationType rotationType = RotationType.Three;
    private Transform cam;
    private Transform bb;
    [Range(0, 1)]
    public float alignYAxis = 1;

    public void Awake()
    {
        cam = Camera.main.transform;
        bb = this.transform;
    }

    public void Update()
    {
        if (rotationType == RotationType.One)
        {
            bb.LookAt(cam);
        }
        else if (rotationType == RotationType.Two)
        {
            bb.forward = (cam.position - bb.position).normalized;
        }
        else
        {
            bb.rotation = cam.transform.rotation;
        }
        var f = bb.forward;
        f.y *= alignYAxis;
        bb.forward = f;
    }
}