SimpleQueueTarget

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

public class Target : MonoBehaviour {

    private Transform queueTransform;
    public float interactionTime = 3.0f;
    public List<Actor> queue = new List<Actor>();

    private void Start()
    {
        queueTransform = transform.GetChild(0).transform;
    }

    public void EnterQueue(Actor actor)
    {
        queue.Add(actor);
        actor.positionInQueue = queueTransform.position + (-transform.forward * (queue.Count - 1));
        actor.queueIndex = queue.Count-1;
    }

    public void LeaveQueue(Actor actor)
    {
        queue.Remove(actor);
        foreach (Actor a in queue)
        {
            a.queueIndex--;
            a.positionInQueue = queueTransform.position + (-transform.forward * a.queueIndex);
            a.state = State.movingToQueuePosition;
        }
    }

}