daluandou/Assets/Script/工具脚本/Billboard.cs

using UnityEngine;

public class Billboard : MonoBehaviour
{
    private Camera _cam;

    private void Awake()
    {
        _cam = Camera.main;
        if (_cam == null)
        {
            Debug.LogWarning("[Billboard] No main camera found.");
        }
    }

    private void Update()
    {
        if (_cam != null)
        {
            transform.LookAt(transform.position + _cam.transform.rotation * Vector3.forward,
                             _cam.transform.rotation * Vector3.up);
        }
    }
}