Unity UI显示3D模型，控件与屏幕分辨率不同，导致在屏幕上鼠标点选模型，无法选中模型的问题

  public Camera modelCamera;
    RaycastHit hit;
    Ray ray;
    /// 

    /// 图层索引
    /// 
    int layerIndex = 0;
    //3d渲染在2d界面显示的内容
    public RawImage rawImage;
    //图片和屏幕的宽和高
    public float imageWidth = 0;
    public float imageHeight = 0;
    public float screenWith = 0;
    public float screenHeight = 0;
    // Start is called before the first frame update
    void Start()
    {
        layerIndex = LayerMask.GetMask("model");
        screenWith = Screen.currentResolution.width;
        screenHeight = Screen.currentResolution.height;
        imageWidth = rawImage.rectTransform.rect.width;
        imageHeight = rawImage.rectTransform.rect.height;
    }
    // Update is called once per frame
    void Update()
    {
        Vector3 clickPosInRawImg = Input.mousePosition;
        if (Input.GetMouseButton(0))
        {     
            //（屏幕的宽度-承载图片的宽度）/2
            //计算屏幕与承载图片宽和高的差值
            float localDiffX = (screenWith - imageWidth) / 2.0f;
            //（屏幕的高度-承载图片的高度）/2
            float localDiffY = (screenHeight - imageHeight) / 2.0f;
            //获取鼠标偏移后的位置
            float xPoint = clickPosInRawImg.x - localDiffX;
            float yPint = clickPosInRawImg.y - localDiffY;
            //获取差集后的鼠标位置点，作为发射线的点
            ray = modelCamera.ScreenPointToRay(new Vector2(xPoint, yPint));
            if (Physics.Raycast(ray, out hit, Mathf.Infinity, layerIndex))
            {
                Debug.DrawLine(ray.origin, hit.point, Color.red);
                Debug.Log(hit.collider.name);
            }
        }
    }