VR中位置限制

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

public class DescendTheWell : MonoBehaviour
{
//目標VR相機父物體
public Transform player;
//目標位置（相機被限制在這裏）
public static Transform target;
public Transform mainCamera;
public bool isNoy;//Y軸不跟隨
public static DescendTheWell I;
public bool IsPlay;
private bool isRot;

private void Awake()
{
    I = GetComponent<DescendTheWell>();
}

private void Update()
{
    if (mainCamera==null) {
        mainCamera = Camera.main.transform;
    }

    if (IsPlay) {
        if (isNoy)
        {
            Vector3 pos = target.position + ( player.position - mainCamera.position );
            player.position = new Vector3(pos.x, player.position.y, pos.z); ;
        }
        else
        {
            player.position = target.position + ( player.position - mainCamera.position );
        }

        if (isRot)
        {
            SetRotation();
        }
}
 
}

public void Play(Transform _target) {
    target = _target;
    IsPlay = true;
    SetRotation();
}

public void Stop() {
    IsPlay = false;
}

private void SetRotation()
{
    Vector3 rot = target.eulerAngles + ( player.eulerAngles - mainCamera.eulerAngles );
    player.eulerAngles = new Vector3(0, rot.y, 0);
}

}