using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LookAt : MonoBehaviour
{
    private Camera mainCamera;

    public bool b;
    public Vector3 r = new Vector3(-180, 0, 180);
    void Start()
    {
        // 获取场景中的主摄像机
        mainCamera = Camera.main;
    }


    void Update()
    {
        if (b)
        {
            // 获取物体到摄像机的方向向量
            Vector3 direction = mainCamera.transform.position - transform.position;
            // 让物体朝向摄像机的方向
            transform.rotation = Quaternion.LookRotation(direction + r);
        }
        else
        {
            transform.LookAt(mainCamera.transform);
            var rot = transform.localEulerAngles;
            rot += r;
            transform.localEulerAngles = rot;
        }
    }
}