我正在 Unity 2D 中創(chuàng)建游戲。我有要添加到場景中的龍。龍只應該在 4 個方向中的 1 個方向上移動，向上、向下、向左和向右。左右移動的龍完全按照預期移動。然而，上下移動的龍有一個問題，就是它們移動時會傾斜。所有向上移動的龍都以 45 度角向上和向右移動。所有向下移動的龍以 45 度角向下和向左移動。起初我認為是動畫師將龍移動到不同位置的問題，但我從預制件中刪除了動畫師組件，問題仍然存在。下面是我用來移動龍的代碼。using System.Collections;using System.Collections.Generic;using UnityEngine;public class DragonMovment : MonoBehaviour {    public string Direction;    //needs to be set in the prefab    public float DragonSpeed;   //speed of dragon    Rigidbody2D rb;     public Transform Boundries;    // Use this for initialization    void Start ()    {        rb = GetComponent<Rigidbody2D>();    }    // Update is called once per frame    void FixedUpdate ()    {        float MoveRight = 1;        float MoveLeft = -1;        float MoveUp = 1;        float MoveDown = -1;        if (Direction== "R")        {            rb.velocity = new Vector3(DragonSpeed * MoveRight, rb.velocity.y);        }        if (Direction == "L")        {            rb.velocity = new Vector3(DragonSpeed * MoveLeft, rb.velocity.y);        }        if (Direction == "U")        {            rb.velocity = new Vector3(DragonSpeed * MoveUp, rb.velocity.x);        }        if (Direction == "D")        {            rb.velocity = new Vector3(DragonSpeed * MoveDown, rb.velocity.x);        }    }}編輯。那么為什么以下工作。using System.Collections;using System.Collections.Generic;using UnityEngine;public class PlayerControler : MonoBehaviour {    // speed of movment     public float Speed;    // rb    Rigidbody2D rb;    public Transform Boundries;    // Use this for initialization    void Start () {        rb = GetComponent<Rigidbody2D>();    }}但其他代碼沒有？