如何将 characterScale.x = -1 替换为 transform。在此上下文中旋转 （0f， 180f， 0f），而不是每帧都执行？

问：

我对编码视频游戏非常陌生，所以我一直在使用很多在线教程来帮助我制作基本的平台游戏/射击游戏。为了让我的角色能够双向射击，我需要精灵和它的子“FirePoint”来翻转。我怎样才能翻转我的角色，每当水平值 = -1 而没有每帧执行相同的命令时，它都是子角色。

提前致谢！

using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public float speed;
    public float jumpforce;
    private float moveInput;
    private Rigidbody2D rb;
    private bool isGrounded;
    public Transform groundCheck;
    public float checkRadius;
    public LayerMask whatIsGround;

    private int extraJumps;
    public int extraJumpsValue;

    public Animator animator;
    void Start()
    {
        extraJumps = extraJumpsValue;
        rb = GetComponent<Rigidbody2D>();
    }
    void FixedUpdate()
    {
        isGrounded = Physics2D.OverlapCircle(groundCheck.position, checkRadius, whatIsGround);

        moveInput = Input.GetAxisRaw("Horizontal");
        rb.velocity = new Vector2(moveInput * speed, rb.velocity.y);


    }
    void Update()
    {
        animator.SetFloat("Horizontal", moveInput);
        if (Input.GetKeyDown(KeyCode.Space) && extraJumps > 0)
        {
            rb.velocity = Vector2.up * jumpforce;
            extraJumps--;
        }
        else if (Input.GetKeyDown(KeyCode.Space) && extraJumps == 0 && isGrounded == true)
        {
            rb.velocity = Vector2.up * jumpforce;
        }
        if (isGrounded == true)
        {
            extraJumps = extraJumpsValue;
        }
        Vector3 characterScale = transform.localScale;
        if (Input.GetAxisRaw("Horizontal") < 0)
        {
            characterScale.x = -1;
        }
        if (Input.GetAxisRaw("Horizontal") > 0)
        {
            characterScale.x = 1;
        }
        transform.localScale = characterScale;
    }
}