c# - 如何让玩家朝它面对的方向移动

Question

我有这个仍在开发中的统一游戏。到目前为止，我的移动代码可以使用箭头键移动播放器。我还有一个用鼠标移动播放器的功能。它会改变玩家的面对面。假设玩家面向左侧。如果我点击向上箭头键，它仍然向前移动。我想将播放器朝它面向的方向移动。

代码:

using System.Collections.Generic;
using UnityEngine;

 public class PlayerMovement : MonoBehaviour {

 public float distance = 5f;

 public Transform playerCam;

 void FixedUpdate () {
  transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, 
  Camera.main.transform.localEulerAngles.y, transform.localEulerAngles.z);
  if (Input.GetKey(KeyCode.LeftArrow))
  {
      Vector3 position = this.transform.position;
      position.x--;
      this.transform.position = position;
  }
  if (Input.GetKey(KeyCode.RightArrow))
  {
      Vector3 position = this.transform.position;
      position.x++;
      this.transform.position = position;
  }
  if (Input.GetKey(KeyCode.UpArrow))
  {
      Vector3 position = this.transform.position;
      position.z++;
      this.transform.position = position;
  }
  if (Input.GetKey(KeyCode.DownArrow))
  {
      Vector3 position = this.transform.position;
      position.z--;
      this.transform.position = position;
  }
  if (Input.GetKey("W"))
  {
      Vector3 position = this.transform.position;
      position.z++;

      this.transform.position = position;
  }
  if (Input.GetKey("S"))
  {
      Vector3 position = this.transform.position;
      position.z--;

      this.transform.position = position;
  }
  if (Input.GetKey("A"))
  {
      Vector3 position = this.transform.position;
      position.x--;

      this.transform.position = position;
  }
  if (Input.GetKey("D"))
  {
      Vector3 position = this.transform.position;
      position.x++;

      this.transform.position = position;
  }
 }
}

Answer 1

使用transform.forward 获取玩家面对的方向。

它永远是一个单位向量，所以如果你只是想在玩家的前进方向上恰好移动一个单位的位置，你可以将它添加到 transform.position 中:

if (Input.GetKey("W")) 
{
    this.transform.position += this.transform.forward;
}