Unity键盘控制物体移动

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

public class Move : MonoBehaviour {
public float speed = 2f;
private Rigidbody rigidbody;
// Use this for initialization
void Start () {
rigidbody = this.GetComponent<Rigidbody>();
}

// Update is called once per frame
void Update () {
float h = Input.GetAxis("Horizontal");
float v = Input.GetAxis("Vertical");
rigidbody.MovePosition(transform.position + new Vector3(h, 0, v) * speed * Time.deltaTime);
}
}