- 帮助 - 如何找到敌人沿着路径的距离？

Question

我目前正在进行塔防游戏，我有一个沿着路径移动的敌人，轨道的每个角落都是一个“节点”，这是我用来创建路径的。我找到了一种方法，通过将每个节点之间的距离相加来找出路径的长度。但我很难弄清楚如何找到敌人在路径上的距离，这是我目前的代码：

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

public class MoveAlongPath : MonoBehaviour
{

    private GameObject[] pathObjects;

    private int currentWayPoint = 0;
    GameObject targetWayPoint;

    private float speed = 2f;

    public float pathDistanceTotal = 0;

    // Start is called before the first frame update
    void Start()
    {
        //Find all of the nodes on the map
        FindNodes();
        transform.position = pathObjects[0].transform.position;
        PathDistance();
    }

    // Update is called once per frame
    void Update()
    {
        //Check if we can move somewhere
        if(currentWayPoint < pathObjects.Length)
        {
            if(targetWayPoint == null) 
                targetWayPoint = pathObjects[currentWayPoint];
            move();
        }
    }

    void FindNodes()
    {
        pathObjects = GameObject.FindGameObjectsWithTag("PathPoint");
    }

    void move()
    {
        transform.right = Vector3.RotateTowards(transform.right, targetWayPoint.transform.position - transform.position, 0, 0.0f);

        transform.position = Vector2.MoveTowards(transform.position, targetWayPoint.transform.position, speed * Time.deltaTime);

        if(transform.position == targetWayPoint.transform.position)
        {
            currentWayPoint++;
            targetWayPoint = pathObjects[currentWayPoint];
        }
    }


    //Find The Path Distance
    void PathDistance()
    {
        int i;
        for (i = 0; i < (pathObjects.Length - 1); i++)
        {
            float dis = Vector2.Distance(pathObjects[i].transform.position, pathObjects[i + 1].transform.position);
            pathDistanceTotal += dis;
        }


    }

}