Unity键盘WASD实现物体移动

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class MoveCam : MonoBehaviour
{
 private Vector3 m_camRot;
 private Transform m_camTransform;//摄像机Transform
 private Transform m_transform;//摄像机父物体Transform
 public float m_movSpeed=10;//移动系数
 public float m_rotateSpeed=1;//旋转系数
 private void Start()
 {
  m_camTransform = Camera.main.transform;
  m_transform = GetComponent<Transform>();
 }
 private void Update()
 {
  Control();
 }
 void Control()
 {
  if (Input.GetMouseButton(0))
  {
   //获取鼠标移动距离
   float rh = Input.GetAxis("Mouse X");
   float rv = Input.GetAxis("Mouse Y");
 
   // 旋转摄像机
   m_camRot.x -= rv * m_rotateSpeed;
   m_camRot.y += rh*m_rotateSpeed;
 
  }
 
  m_camTransform.eulerAngles = m_camRot;
 
  // 使主角的面向方向与摄像机一致
  Vector3 camrot = m_camTransform.eulerAngles;
  camrot.x = 0; camrot.z = 0;
  m_transform.eulerAngles = camrot;
 
  // 定义3个值控制移动
  float xm = 0, ym = 0, zm = 0;
 
  //按键盘W向上移动
  if (Input.GetKey(KeyCode.W))
  {
   zm += m_movSpeed * Time.deltaTime;
  }
  else if (Input.GetKey(KeyCode.S))//按键盘S向下移动
  {
   zm -= m_movSpeed * Time.deltaTime;
  }
 
  if (Input.GetKey(KeyCode.A))//按键盘A向左移动
  {
   xm -= m_movSpeed * Time.deltaTime;
  }
  else if (Input.GetKey(KeyCode.D))//按键盘D向右移动
  {
   xm += m_movSpeed * Time.deltaTime;
  }
  if (Input.GetKey(KeyCode.Space) && m_transform.position.y <= 3)
  {
   ym+=m_movSpeed * Time.deltaTime;
  }
  if (Input.GetKey(KeyCode.F) && m_transform.position.y >= 1)
  {
   ym -= m_movSpeed * Time.deltaTime;
  }
  m_transform.Translate(new Vector3(xm,ym,zm),Space.Self);
 }
}