UI跟随3d物体

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

public class GameObjectTips : MonoBehaviour
{
    /// 

    /// 需要被跟随的物体
    /// 
    [Header("需要被跟随的物体")]
    public Transform TargetGameobject;

    [Header("跟随物体的UI")]
    public RectTransform TargetIndicateTips;


    public Camera UI_Camera;
    public Canvas UI_Canvas;

    public float yAxisoffset = 20;

    bool isFollow;
    // Update is called once per frame
    void Update()
    {
        if (isFollow)
        {
            UpdateNamePosition();
        }

    }

    void UpdateNamePosition()
    {
        if (TargetGameobject==null)
        {
            return;
        }
        Vector2 mouseDown = Camera.main.WorldToScreenPoint(TargetGameobject.transform.position);
        Vector2 mouseUGUIPos = new Vector2();
        bool isRect = RectTransformUtility.ScreenPointToLocalPointInRectangle(UI_Canvas.transform as RectTransform, mouseDown, UI_Camera, out mouseUGUIPos);
        if (isRect)
        {
            TargetIndicateTips.anchoredPosition = new Vector2(mouseUGUIPos.x, mouseUGUIPos.y + yAxisoffset);
        }
    }



    public void FollowTarget(Transform _Target,bool _FollowState)
    {
        isFollow = _FollowState;
        TargetIndicateTips.gameObject.SetActive(isFollow);
        if (isFollow)
        {
            TargetGameobject = _Target;
        }
        else
        {
            TargetGameobject = null;

        }
    }

    public void FollowTarget(bool _FollowState)
    {
        isFollow = _FollowState;
        if (_FollowState)
        {

        }
        else
        {
            TargetIndicateTips.gameObject.SetActive(isFollow);
        }

    }
}