Unity3d物体移动到鼠标左键点击处

using UnityEngine;
using System.Collections;

/*
 *物体移动到鼠标左键点击处
 */

public class PlayerMovePos : MonoBehaviour {

    private bool finish = true;
    private Vector3 pos;

    // Use this for initialization
    void Start () {
    
    }
    
    // Update is called once per frame
    void Update () {

        //物体每次移动一定距离到鼠标点击处
        //if (Input.GetMouseButtonDown(0))
        //{
        //    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        //    RaycastHit hit = new RaycastHit();
        //    if (Physics.Raycast(ray, out hit))
        //    {
        //        pos = hit.point;
        //        pos.y = 20f;
        //        finish = false;
        //    }
        //}

        //if (Input.GetMouseButtonUp(0))
        //{
        //    finish = true;
        //}

        //if (!finish)
        //{
        //    Vector3 offset = pos - transform.position;
        //    transform.position += offset.normalized * 100 * Time.deltaTime;
        //    if (Vector3.Distance(pos, transform.position) < 1f)
        //    {
        //        transform.position = pos;
        //        finish = true;
        //    }
        //}


        //物体直接出现在鼠标左键点击的位置
        //if (Input.GetMouseButtonDown(0))
        //{
        //    Vector3 screenpos = Input.mousePosition;
        //    Ray ray = Camera.main.ScreenPointToRay(screenpos);
        //    RaycastHit hitinfo = new RaycastHit();
        //    if (Physics.Raycast(ray, out hitinfo))
        //    {
        //        pos = hitinfo.point;
        //        transform.position = new Vector3(pos.x,transform.position.y, pos.z);
        //    }
        //}
    }
}

使用请去掉注释！！！