c# - Unity 2D 中翻转 Sprite 的问题

Question

我是 unity 的新手，我一直在关注有关编写 2D 平台游戏脚本的 youtube 指南，现在我已经到了这样的地步，当我转向相反的方向时，我正试图向 Sprite 添加一个翻转。

我添加了一个代码，现在它不断地从左向右翻转。如果我理解正确，那可能是因为我在移动时不断应用 > 0.1f 导致函数持续运行，但老实说我迷路了，所以任何帮助将不胜感激。

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (Controller2D))]
public class Player : MonoBehaviour {

public float jumpHeight = 4;
public float timeToJumpApex = .4f;
float accelerationTimeAirbourne = .2f;
float acceleratinTimeGrounded =.1f;
public float moveSpeed = 6;

float jumpVelocity;
float gravity;
Vector3 velocity;
float velocityXSmoothing; 

Controller2D controller;    

void Start(){
    controller = GetComponent<Controller2D>();
    gravity = -(2 * jumpHeight) / Mathf.Pow (timeToJumpApex, 2);
    jumpVelocity = Mathf.Abs(gravity) * timeToJumpApex;     
    print ("gravity: " + gravity + " Jump Velocity: " + jumpVelocity);
}

void Update(){

    if (controller.collisions.above || controller.collisions.above) {
        velocity.y = 0;
    }

    Vector2 input = new Vector2 (Input.GetAxisRaw ("Horizontal"), 
Input.GetAxisRaw ("Vertical"));

    if (Input.GetKeyDown (KeyCode.Space) && controller.collisions.below) {
        velocity.y = jumpVelocity;
    }

    float targetVelocityX = input.x * moveSpeed;
    velocity.x = Mathf.SmoothDamp(velocity.x, targetVelocityX, ref 
velocityXSmoothing, (controller.collisions.below)?
acceleratinTimeGrounded:accelerationTimeAirbourne);
    velocity.y += gravity * Time.deltaTime;
    controller.Move(velocity * Time.deltaTime);
}

void FixedUpdate(){

if ((Input.GetAxis("Horizontal") > 0.1f && this.transform.localScale.x != 1) 
|| (Input.GetAxis("Horizontal") < -0.1f && this.transform.localScale.x != 
-1))
{
flip();
}

}

void flip()
{
     this.transform.localScale = new Vector3(this.transform.localScale.x * 
  -1, 
    this.transform.localScale.y, this.transform.localScale.z);
}



}

Answer 1

你的错误在这里

void FixedUpdate(){
if ((Input.GetAxis("Horizontal") > 0.1f && this.transform.localScale.x != 1)|| (Input.GetAxis("Horizontal") < -0.1f && this.transform.localScale.x != 
-1)){
        flip();
    }
}

翻转后，条件仍然计算为真。你将需要一个 bool 值 hasflipped 来检查你是否已经翻转过，如果你没有再次翻转 :)

已修复的更新导致此检查每帧发生一次，因此当您的 Sprite 每帧翻转时您会看到一堆闪烁，除非您指定仅翻转一次