Gemini×Unityで作るカフェ経営ゲーム第2回：NavMeshとFSMで動く客AI

Unity 2022.3 (C#) で動く客AIスクリプト「CustomerAI.cs」を作成してください。

【要件】
1. Enum「CustomerState」を定義してください：
   - Spawning, MovingToSeat, WaitingForOrder, Dining, Leaving
2. 必要なコンポーネント：
   - NavMeshAgent, Animator
3. 行動ロジック：
   - MovingToSeat: 指定された座席（Transform）へ移動。到着したらAnimatorの「IsSitting」をtrueにしてWaitingForOrderに遷移。
   - WaitingForOrder: タイマーをカウント（最大30秒）。注文を受けたらDiningへ遷移。タイマー超過で怒り退店（Leaving）。
   - Dining: 10秒間食事。終了したら代金を払い（GameManager.Instance.AddMoney）、座席を解放してLeavingへ遷移。
   - Leaving: 出口（Transform）へ移動。到着したらGameObjectを破棄（Destroy）。
4. Animatorのfloat変数「Speed」に `agent.velocity.magnitude` を毎フレーム同期させて歩行アニメーションを切り替えてください。

using UnityEngine;
using UnityEngine.AI;

public enum CustomerState
{
    Spawning,
    MovingToSeat,
    WaitingForOrder,
    Dining,
    Leaving
}

public class CustomerAI : MonoBehaviour
{
    public CustomerState currentState = CustomerState.Spawning;

    private NavMeshAgent agent;
    private Animator animator;

    public Transform targetSeat;
    public Transform exitPoint;

    public float maxWaitTime = 30f;
    private float currentWaitTimer = 0f;
    private float diningTimer = 0f;

    public System.Action OnWaitTimerUpdated; // 頭上UI通知用

    private void Awake()
    {
        agent = GetComponent();
        animator = GetComponent();
    }

    private void Update()
    {
        // 歩行アニメーションの速度同期
        animator.SetFloat("Speed", agent.velocity.magnitude);

        switch (currentState)
        {
            case CustomerState.MovingToSeat:
                if (!agent.pathPending && agent.remainingDistance <= agent.stoppingDistance)
                {
                    // 座席に到着
                    transform.rotation = targetSeat.rotation;
                    animator.SetBool("IsSitting", true);
                    agent.enabled = false; // 座席固定のためAgentオフ
                    currentState = CustomerState.WaitingForOrder;
                }
                break;

            case CustomerState.WaitingForOrder:
                currentWaitTimer += Time.deltaTime;
                OnWaitTimerUpdated?.Invoke(currentWaitTimer, maxWaitTime);

                if (currentWaitTimer >= maxWaitTime)
                {
                    // 待ち時間オーバー（怒り退店）
                    GameManager.Instance?.SetRating(GameManager.Instance.currentRating - 0.2f);
                    LeaveStore();
                }
                break;

            case CustomerState.Dining:
                diningTimer += Time.deltaTime;
                if (diningTimer >= 10f)
                {
                    // 食事完了・会計
                    GameManager.Instance?.AddMoney(800); // ドリンク＋フード代
                    LeaveStore();
                }
                break;

            case CustomerState.Leaving:
                if (!agent.pathPending && agent.remainingDistance <= agent.stoppingDistance)
                {
                    Destroy(gameObject);
                }
                break;
        }
    }

    public void AssignSeat(Transform seat)
    {
        targetSeat = seat;
        agent.SetDestination(targetSeat.position);
        currentState = CustomerState.MovingToSeat;
    }

    public void ServeOrder()
    {
        if (currentState == CustomerState.WaitingForOrder)
        {
            currentState = CustomerState.Dining;
        }
    }

    private void LeaveStore()
    {
        animator.SetBool("IsSitting", false);
        agent.enabled = true;
        if (exitPoint != null) agent.SetDestination(exitPoint.position);
        currentState = CustomerState.Leaving;
    }
}

using UnityEngine;
using UnityEngine.UI;

public class CustomerHeadUI : MonoBehaviour
{
    [SerializeField] private Slider waitSlider;
    [SerializeField] private Image fillImage;
    [SerializeField] private CustomerAI customerAI;

    private void OnEnable()
    {
        if (customerAI != null) customerAI.OnWaitTimerUpdated += UpdateWaitGauge;
    }

    private void OnDisable()
    {
        if (customerAI != null) customerAI.OnWaitTimerUpdated -= UpdateWaitGauge;
    }

    private void LateUpdate()
    {
        // 常にメインカメラの方向を向かせる（Billboard処理）
        if (Camera.main != null)
        {
            transform.rotation = Camera.main.transform.rotation;
        }
    }

    private void UpdateWaitGauge(float current, float max)
    {
        float ratio = current / max;
        waitSlider.value = 1.0f - ratio; // 残り時間を表示

        // 待ち時間に応じて緑 ➔ 黄 ➔ 赤へ色変化
        if (ratio > 0.7f) fillImage.color = Color.red;
        else if (ratio > 0.4f) fillImage.color = Color.yellow;
        else fillImage.color = Color.green;
    }
}

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

public class CustomerSpawner : MonoBehaviour
{
    [SerializeField] private GameObject customerPrefab;
    [SerializeField] private Transform spawnPoint;
    [SerializeField] private Transform exitPoint;
    [SerializeField] private List seatList;

    private float spawnTimer = 0f;
    public float spawnInterval = 8f;

    private void Update()
    {
        if (GameManager.Instance != null && !GameManager.Instance.isStoreOpen) return;

        spawnTimer += Time.deltaTime;
        if (spawnTimer >= spawnInterval)
        {
            spawnTimer = 0f;
            TrySpawnCustomer();
        }
    }

    private void TrySpawnCustomer()
    {
        Transform emptySeat = GetEmptySeat();
        if (emptySeat == null)
        {
            Debug.Log("満席のため客が素通りしました");
            return;
        }

        GameObject obj = Instantiate(customerPrefab, spawnPoint.position, spawnPoint.rotation);
        CustomerAI ai = obj.GetComponent();
        ai.exitPoint = exitPoint;
        ai.AssignSeat(emptySeat);
    }

    private Transform GetEmptySeat()
    {
        // 簡易的な空き席検索（拡張可能）
        if (seatList.Count > 0)
        {
            return seatList[Random.Range(0, seatList.Count)];
        }
        return null;
    }
}