garden_client/Assets/Script/Tool/UI/HudTarget.cs

using UnityEngine;

using System.Collections;

public class HudTarget : MonoBehaviour 
{
    #region 变量

    public Transform PosTra;

    #endregion

    private void Update()
    {
        SetPosition();
    }

    public void SetPosition()
    {
        transform.position = Camera.main.WorldToScreenPoint(PosTra.position);
    }
}