c# - Vector3.MoveTowards 不工作。它不会移动或显示任何错误

Question

当使用 Vector3.MoveTowards 时，它不会对任何一个执行任何操作，因为一个无法运行会导致另一个无法运行。

这是我的代码:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
public class PlaneAI : MonoBehaviour
{
    public Transform[] runwayPoints;
    public Transform[] startTakeoffPoints;
    public Transform[] takeoffPoints;
    public NavMeshAgent navMeshAgent;
    public bool takeoff = false;
    bool departing = false;
    bool moving = false;
    int selectedRunway;
    public IEnumerator Depart()
    {
        navMeshAgent.SetDestination(runwayPoints[selectedRunway = Random.Range(0, runwayPoints.Length)].position);
        yield return new WaitForSeconds(3f);
        departing = true;
    }
    public void Update()
    {
        if (Input.GetKeyDown(KeyCode.P))
        {
            StartCoroutine(Depart());
        }
        GetComponent<LineRenderer>().SetPosition(0, new Vector3(transform.position.x, 1, transform.position.z));
        GetComponent<LineRenderer>().SetPosition(1, navMeshAgent.destination);
        if (navMeshAgent.pathStatus == NavMeshPathStatus.PathComplete && departing && navMeshAgent.remainingDistance == 0)
        {
            Takeoff();
        }
        if (moving && Vector3.Distance(transform.position, startTakeoffPoints[selectedRunway].position) <= 0.001f)
        {
            transform.position = Vector3.MoveTowards(transform.position, takeoffPoints[selectedRunway].position, 3); // this one does not work it should be after the other one
            transform.LookAt(takeoffPoints[selectedRunway]);
            takeoff = false;
        }
    }
    public void Takeoff()
    {
        navMeshAgent.enabled = false;
        GetComponent<Collider>().enabled = false;
        transform.LookAt(new Vector3(takeoffPoints[selectedRunway].position.x, 0, takeoffPoints[selectedRunway].position.z));
        MoveTakeoff();
        departing = false;
    }
    public void MoveTakeoff()
    {
        transform.position = Vector3.MoveTowards(transform.position, startTakeoffPoints[selectedRunway].position, 2); // this one does not work
        moving = true;
        takeoff = false;
    }
}

没有脚本错误，只是行不通。

我认为不相关的唯一错误是:

“无效的 worldAABB。对象太大或离原点太远。”

“无效的 localAABB。对象转换已损坏。”

“表达式断言失败:'IsFinite(d)'UnityEngine.GUIUtility:processEvent(Int32, IntPtr)"

“表达式断言失败:'IsFinite(outDistanceForSort)'UnityEngine.GUIUtility:processEvent(Int32, IntPtr)"

“表达式断言失败:'IsFinite(outDistanceAlongView)'UnityEngine.GUIUtility:processEvent(Int32, IntPtr)"

Answer 1

您需要更好地将状态转换逻辑与状态事件逻辑分开。当状态转换发生在相同的 block 中时，您有代码应该运行，代码应该在状态处于事件状态的每一帧运行。

处理此问题的一种方法是将状态转换为协程:

public class PlaneAI : MonoBehaviour
{
    public Transform[] runwayPoints;
    public Transform[] startTakeoffPoints;
    public Transform[] takeoffPoints;
    public NavMeshAgent navMeshAgent;
    public bool takeoff = false;
    bool departing = false;
    bool moving = false;
    int selectedRunway;

    LineRenderer lr;

    void Awake()
    { 
        lr = GetComponent<LineRenderer>();
    }

    IEnumerator Depart()
    {
        navMeshAgent.SetDestination(runwayPoints[selectedRunway = Random.Range(0, 
                runwayPoints.Length)].position);
        yield return new WaitForSeconds(3f);

        departing = true;
        while(departing)
        {           
            if (navMeshAgent.pathStatus == NavMeshPathStatus.PathComplete 
                    && navMeshAgent.remainingDistance == 0)
            {
                StartCoroutine(MoveTakeoff());
                yield break;
            }
            yield return null;
        }
    }

    IEnumerator MoveTakeOff()
    {
        departing = false;
        moving = true;

        navMeshAgent.enabled = false;
        GetComponent<Collider>().enabled = false;
        transform.LookAt(new Vector3(takeoffPoints[selectedRunway].position.x, 0,
                takeoffPoints[selectedRunway].position.z));

        while (moving)
        {
            if (Vector3.Distance(transform.position, 
                    startTakeoffPoints[selectedRunway].position) <= 0.001f)
            {                    
                StartCoroutine(TakeOff())
                yield return break;
            }

            transform.position = Vector3.MoveTowards(transform.position, 
                    startTakeoffPoints[selectedRunway].position, 2);

            yield return null;
        }
    }

    IEnumerator Takeoff()
    {
        moving = false;
        takeOff = true;

        transform.LookAt(takeoffPoints[selectedRunway]);

        while (takeOff)
        {
 
            if (Vector3.Distance(transform.position, 
                    startTakeoffPoints[selectedRunway].position) <= 0.001f)
            {
                takeoff = false;
                yield break;
            }

            transform.position = Vector3.MoveTowards(transform.position, 
                    takeoffPoints[selectedRunway].position, 3); 
            yield return null;
        }
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.P))
        {
            StopAllCoroutines();
            StartCoroutine(Depart());
        }

        lr.SetPosition(0, new Vector3(transform.position.x, 1, transform.position.z));
        lr.SetPosition(1, navMeshAgent.destination);

    }
}

理想情况下，状态应该是单个枚举器而不是多个 bool 值，但希望这能说明我的意思。