UnityでNavMeshを使わず、特定のGameObjectを巡回させるスクリプト

Patrol.cs

using UnityEngine;
using System.Collections;

public class Patrol : MonoBehaviour
{

    [SerializeField, TooltipAttribute("経由地点の数を入力し，シーン上に配置した空のオブジェクトをアサインします")]
    public Transform[] wayPoints;

    public Transform target;
    public float speed;

    public int currentRoot;


    void Update()
    {

        //配列に入れたTransformを順に巡る．AIを使っていればスムーズに曲がるがこれは鋭角に曲がる

        float step = speed * Time.deltaTime;
        transform.position = Vector3.MoveTowards(transform.position, wayPoints[currentRoot].position, step);


        Vector3 pos = wayPoints[currentRoot].position;

        float test = Vector3.Distance(target.position, pos);
        transform.LookAt(pos);
                    
        if(Vector3.Distance(transform.position, pos) < 0.5f)
        {
          currentRoot = (currentRoot < wayPoints.Length - 1) ? currentRoot + 1 : 0;
        }

    }
}