Unity3D - 为什么我的对象每秒不移动每一帧答案

【问题标题】：Unity3D - Why my object doesnt move every frame per secondUnity3D - 为什么我的对象每秒不移动每一帧
【发布时间】：2021-11-12 19:09:45
【问题描述】：

我正在努力解决非常奇怪且可能很简单的问题，我创建了一个机器人，他的任务是朝着目标移动我的意思是我在 void update 中使用 Vector3.MoveTowards 函数来每帧移动我的机器人，但问题是他仅移动一次并停止，他正在迈出一步而不是例如 100 步。我正在使用 Unity3D。这是源代码；

public class Test01 : MonoBehaviour
{
public float speed, stopDist, rotationSpeed, moveSpeed, minSpeed, maxBackSpeed, maxFrontSpeed, turnSpeed, riseSpeed;
public Transform target;
private Rigidbody rb;
private float currentSpeed;

public bool isFinding = false;
private PlaySound signal;

void Start()
{
    signal = GameObject.FindGameObjectWithTag("Signal").GetComponent<PlaySound>();
    rb = GetComponent<Rigidbody>();
}

private void Update()
{
    // If space key button is pressed the robot's isFinding bool is becaming true and robot is starting searching for target.
    if (Input.GetKeyDown(KeyCode.Space))
    {
        isFinding = true;
        if (Vector3.Distance(transform.position, target.position) > stopDist)
        {
            transform.position = Vector3.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
            signal.isAlarming = true;
            signal.Sound();
        }
        else if (Vector3.Distance(transform.position, target.position) < stopDist)
        {
            isFinding = false;
            signal.isAlarming = false;
            SoundManager.instance.StopSound();
            StopChasing();
        }
    }
}
 public void StopChasing()
{
    transform.position = this.transform.position;
}

【问题讨论】：

标签： c# unity3d

【解决方案1】：

目前您将所有内容都嵌套在GetKeyDown 下，因此它只执行一次。

你可以改变这种做法

if (Input.GetKeyDown(KeyCode.Space))
{
    isFinding = true;
}

if(isFinding)
{
    if (Vector3.Distance(transform.position, target.position) > stopDist)
    {
        transform.position = Vector3.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
        signal.isAlarming = true;
        signal.Sound();
    }
    else
    {
        isFinding = false;
        signal.isAlarming = false;
        SoundManager.instance.StopSound();
        StopChasing();
    }
}

所以按Space一次会激活isFinding模式，直到它到达Vector3.Distance(transform.position, target.position) < stopDist

【讨论】：

【解决方案2】：

Input.GetKeyDown 是您按下键时的功能。

您可能希望将其更改为 Input.GetKey，这样每次您保持空间时它都会移动。

这样，

private void Update()
{
    // If space key button is pressed the robot's isFinding bool is becaming true and robot is starting searching for target.
    if (Input.GetKey(KeyCode.Space))
    {
        isFinding = true;
        if (Vector3.Distance(transform.position, target.position) > stopDist)
        {
            transform.position = Vector3.MoveTowards(transform.position, target.position, speed* Time.deltaTime);
            signal.isAlarming = true;
            signal.Sound();
        }
        else if (Vector3.Distance(transform.position, target.position) < stopDist)
        {
            isFinding = false;
            signal.isAlarming = false;
            SoundManager.instance.StopSound();
            StopChasing();
        }
    }
}

如果您使用Input.GetKeyDown 让机器人开始瞄准。然后像这样拆分

private void Update()
{
    // If space key button is pressed the robot's isFinding bool is becaming true and robot is starting searching for target.
    if (Input.GetKeyDown(KeyCode.Space))
    {
        isFinding = true;
    }
    if (isFinding)
    {
        if (Vector3.Distance(transform.position, target.position) > stopDist)
        {
            transform.position = Vector3.MoveTowards(transform.position, target.position, speed* Time.deltaTime);
            signal.isAlarming = true;
            signal.Sound();
        }
        else if (Vector3.Distance(transform.position, target.position) < stopDist)
        {
            isFinding = false;
            signal.isAlarming = false;
            SoundManager.instance.StopSound();
            StopChasing();
        }
    }
}

毕竟，您之前所做的并没有真正使用 isFinding 作为任何东西，您只需将其设置为 true，它不会对代码产生任何影响。

【讨论】：