视口坐标转世界坐标

[HideInInspector]
    public float leftBorder;
    [HideInInspector]
    public float rightBorder;
    [HideInInspector]
    public float topBorder;
    [HideInInspector]
    public float downBorder;
    private float width;
    private float height;
    void Start()
    {
        //世界坐标右上角 = 相机右上角 1, 1点转换成的
        Vector3 cornerPos = Camera.main.ViewportToWorldPoint(new Vector3(1f, 1f,
            Mathf.Abs(-Camera.main.transform.position.z)));
        //世界坐标的左上角位置 = 视口坐标x0点位置 - (世界坐标x位置(右上角)-视口坐标0的位置) 
        leftBorder = Camera.main.transform.position.x - (cornerPos.x - Camera.main.transform.position.x);
        rightBorder = cornerPos.x;
        topBorder = cornerPos.y;
        downBorder = Camera.main.transform.position.y - (cornerPos.y - Camera.main.transform.position.y);

        width = rightBorder - leftBorder;
        height = topBorder - downBorder;

        Debug.Log(cornerPos);
        Debug.Log(Camera.main.transform.position.x);
        Debug.Log(leftBorder);
        Debug.Log(rightBorder);
        Debug.Log(topBorder);
        Debug.Log(downBorder);
        Debug.Log(width);
        Debug.Log(height);

        
    }