Unity3D 物体移动到点击位置

using UnityEngine;
using System.Collections;

public class MoveToClick : MonoBehaviour
{
public GameObject play;
public Vector3 temPos;
public bool isMoving;
public Quaternion rotation;
// Use this for initialization
void Start()
{
play = GameObject.Find("Hero");
print(play);
}

// Update is called once per frame
void Update()
{
if (Input.GetMouseButtonDown(0))
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;

if (Physics.Raycast(ray, out hit, 100))
{
print(hit.collider.name);
if (hit.collider.gameObject.name == "Plane")
{
Debug.Log(hit.point);

temPos = new Vector3(hit.point.x, play.transform.position.y, hit.point.z);

if (Vector3.Distance(play.transform.position, temPos) > 0.1)
{
isMoving = true;
}
}
}
}

if (Vector3.Distance(play.transform.position, temPos) <= 0.1)
{
isMoving = false;
}

if (isMoving)
{
turn(temPos);
this.GetComponent<CharacterController>().SimpleMove((temPos - play.transform.position).normalized * 5f);
}

}

void turn(Vector3 look)
{
rotation = Quaternion.LookRotation(temPos - play.transform.position, Vector3.up);
play.transform.rotation = Quaternion.Slerp(play.transform.rotation, rotation, Time.deltaTime * 6.0f);
}
}