using UnityEngine;

public class LookAt : MonoBehaviour
{
    private Camera _mainCam;
    private bool revert;
    public bool isLockY = false;
    public bool isLockXZ = false;
    // Start is called before the first frame update
    void Start()
    {
        _mainCam = Camera.main;
        revert = true;
    }

    // Update is called once per frame
    void Update()
    {
        if (!_mainCam) return;
        var dir = transform.position - _mainCam.transform.position;
        var up = Vector3.up;
        if (isLockY)
        {
            dir.y = 0;
        }
        else if (isLockXZ)
        {
            up.Set(dir.x, 0, dir.z);
            dir = Vector3.ProjectOnPlane(dir, up);

        }
        transform.LookAt(transform.position + dir, up);
    }
}