为什么路线列表和代理列表是空的？

Question

我创建了一个WaypointsClass类：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using System;
using UnityEngine.AI;

[Serializable]
public class WaypointsClass
{
    public List<Transform> points = new List<Transform>();
    public List<NavMeshAgent> agents = new List<NavMeshAgent>();
}

然后创建WaypointsAI脚本：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class WaypointsAI : MonoBehaviour
{
    public WaypointsClass waypoints;
    public float distanceToContinue;

    private float currentDistanceToPoint;
    private int lastPointIndex;
    private int goalPointIndex;


    void Start()
    {
        //Firstly check if the waypoints are set up correctly
        if (waypoints.points.Count < 1)
        {
            Debug.LogError("Set up the waypoints for this gameObject!");
        }
        else
        {
            //Now set up the path
            lastPointIndex = 0; //Start from the index 0
            waypoints.agents[0].transform.position = waypoints.points[0].position;
            if (waypoints.points.Count > 1)
            {
                goalPointIndex = 1; //Go to the [1] waypoint
            }
            else
            {
                goalPointIndex = 0;
            }
        }
    }

    void FixedUpdate()
    {
        for (int i = 0; i < waypoints.agents.Count; i++)
        {
            //Calculate the distance and check if it should move to the next waypoint.
            currentDistanceToPoint = Vector3.Distance(waypoints.agents[i].transform.position, waypoints.points[goalPointIndex].position);
            if (currentDistanceToPoint <= distanceToContinue)
            {
                //Save the old index, totally useless in this implementation though
                lastPointIndex = goalPointIndex;
                //Increase goal index to change the goal waypoint to the next, (Or maybe random one?)
                goalPointIndex++;
                if (goalPointIndex >= waypoints.points.Count)
                    goalPointIndex = 0;
            }

            //Now move towards the current waypoint, Change this to fit your code with navMesh anyway I think I did a lot for you anyway
            waypoints.agents[i].transform.LookAt(waypoints.points[goalPointIndex].position);
            waypoints.agents[i].transform.Translate(Vector3.forward * Time.deltaTime * 10);
        }
    }
}

然后为每组代理和路径点添加一个脚本。红色和蓝色：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

public class RedWaypoints : MonoBehaviour
{
    public GameObject[] redWaypoints;
    public NavMeshAgent redAgent;

    // Start is called before the first frame update
    void Start()
    {
        redWaypoints = GameObject.FindGameObjectsWithTag("Red_Waypoint");

        WaypointsClass wpc = new WaypointsClass();

        foreach (GameObject point in redWaypoints)
        {
            wpc.points.Add(point.transform);
        }

        wpc.agents.Add(redAgent);
    }

    // Update is called once per frame
    void Update()
    {

    }
}

蓝色：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

public class BlueWaypoints : MonoBehaviour
{
    public GameObject[] blueWaypoints;
    public NavMeshAgent blueAgent;

    // Start is called before the first frame update
    void Start()
    {
        blueWaypoints = GameObject.FindGameObjectsWithTag("Blue_Waypoint");

        WaypointsClass wpc = new WaypointsClass();

        foreach (GameObject point in blueWaypoints)
        {
            wpc.points.Add(point.transform);
        }

        wpc.agents.Add(blueAgent);
    }

    // Update is called once per frame
    void Update()
    {

    }
}

然后，我在层次结构和场景组中创建了红色路径点和红色字符，以及蓝色字符的蓝色路径点组：

​

​

我想做的主要目标是使用相同的WaypointsAI脚本在蓝色路径点之间移动蓝色字符，并在红色路径点之间移动红色字符。如果蓝色组有5个字符，那么在蓝色路径点之间移动5个字符，如果红色组有50个字符，它们将在红色路径点之间移动。

现在的第一个问题是列表、点和代理在WaypointsAI脚本中是空的。我在这一行中添加了一个断点：

if (waypoints.points.Count < 1)

两个名单都是空的。

我尝试将脚本RedWaypoints和BlueWaypoints中的Start()中的代码移动到WaypointsClass ()中，它为WaypointsClass类做了一个新实例，但是当它到达WaypointsAI脚本时，列表是空的。我搞不懂为什么。

更简单的是，在这个截图中，我有两个角色，一个是t型角色，另一个是中间是蓝色圆圈的机器人。我希望每个人都能在其他点之间移动。一个可以爬上楼梯，另一个可以搬到窗口，然后向后移动：

​

​

Answer 1

您的问题:无法访问在另一个脚本中创建的类实例。

如果我理解你的问题..。我建议您使用静态类和静态列表，以便可以从任意脚本访问：

public static class Waypoints
{
    public static List<Transform> Redpoints = new List<Transform>();
    public static List<NavMeshAgent> Redagents = new List<NavMeshAgent>();
    public static List<Transform> Bluepoints = new List<Transform>();
    public static List<NavMeshAgent> Blueagents = new List<NavMeshAgent>();
}

public class RedWaypoints : MonoBehaviour
{
    public GameObject[] redWaypoints;
    public NavMeshAgent redAgent;

    // Start is called before the first frame update
    void Start()
    {
        redWaypoints = GameObject.FindGameObjectsWithTag("Red_Waypoint");

        foreach (GameObject point in redWaypoints)
        {
            Waypoints.Redpoints.Add(point.transform);
        }

        Waypoints.Redagents.Add(redAgent);
    }
    :
    :
}

public class BlueWaypoints : MonoBehaviour
{
    public GameObject[] blueWaypoints;
    public NavMeshAgent blueAgent;

    // Start is called before the first frame update
    void Start()
    {
        blueWaypoints = GameObject.FindGameObjectsWithTag("Blue_Waypoint");


        foreach (GameObject point in blueWaypoints)
        {
            Waypoints.Bluepoints.Add(point.transform);
        }

        Waypoints.Blueagents.Add(blueAgent);
    }
    :
    :
}

从另一个脚本中，如果要访问第一个红点项，只需键入Waypoints.Redpoints[0]，对于第一个红色代理，只需键入Waypoints.Redagents[0]，而对于蓝色侧则是相同的

在WaypointsAI中，不需要声明public WaypointsClass waypoints;