让物体移动到点击的位置

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class MouseRayPoint : MonoBehaviour
{
     Vector3 target; // 跟踪目标
    public float smoothTime = 5f; // 平滑时间
    private Vector3 velocity = Vector3.zero;
    GameObject mainRole;
    public float speedMove = 10f;
    private void Start()
    {
        mainRole = GameObject.Find("Cube");
    }
    void Update()
    {
        Ray oneRayMouse = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit OneShotOBJ;
        Physics.Raycast(oneRayMouse, out OneShotOBJ);
        if (Input.GetMouseButtonDown(0))
        {
             Debug.Log(OneShotOBJ.point+"== "+ OneShotOBJ.transform.name);
             target= OneShotOBJ.point;
        }
 
        if (target!=null)
        {
            FollowPointSmooth();
         
        }
 
    } //end update
 
    void FollowPointSmooth()
    {
         计算新的位置
        Vector3 targetPosition = target + new Vector3(0, 1, -1);//提供一个相对target.position的一个偏差                                                                             
        mainRole.transform.position = Vector3.SmoothDamp(mainRole.transform.position, targetPosition, ref velocity, smoothTime); //平滑移动到新的位置
        mainRole.transform.LookAt(target + new Vector3(0, 1.5f, 0));
    }
   
}//end class