unity 鼠標鎖住不動旋轉攝像頭視角

把原來光標隱藏  找一個圖片放在中間移動完畢真實鼠標光標顯示出來

//******************************************************************
// 
// 文件名（File Name）：      ViewControl.cs
//
// 功能描述（Description）： 光標不動旋轉攝像機
// 
// 作者（Author）：              sqw
//
// 日期（Create Date）：      2019.10.10
//
//******************************************************************

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

public class ViewControl:MonoBehaviour
{
    public static extern int SetCursorPos(int x, int y);
    enum RotationAxes
    {
        MouseXAndY,
        MouseX,
        MouseY
    }
    RotationAxes axes = RotationAxes.MouseXAndY;
    float sensitivityX = 10;
    float sensitivityY = 10;
    float minimumY = -60;
    float maximumY = 60;
    private float rotationY = 0;
    public Image cursor;

    private void Start()
    {


    }
   
    public void Update()
    {
      
        if (Input.GetMouseButton(0))
        {
            Cursor.lockState = CursorLockMode.Locked;//鎖定指針到視圖中心
            Cursor.visible = false;//隱藏指針
            Cursor.visible = false;
            cursor.enabled = true;
            if (axes == RotationAxes.MouseXAndY)
            {
                float rotationX = Camera.main.transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX;
                rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);
                Camera.main.transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
            }
            else if (axes == RotationAxes.MouseX)
            {
                Camera.main.transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX, 0);
            }
            else
            {
                rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);
                Camera.main.transform.localEulerAngles = new Vector3(-rotationY, Camera.main.transform.localEulerAngles.y, 0);
            }
            
        }
        if (Input.GetMouseButtonUp(0))
        {
            Cursor.visible = true;//顯示指針
            Cursor.lockState = CursorLockMode.None;//鎖定指針到視圖中心
            cursor.enabled = false;
           
        }
    }

   
}