Gemini×Unityで作るカフェ経営ゲーム第4回：メニュー調合と原価率計算UI

Unity 2022.3 (C#) で動作する「RecipeDeveloper.cs」を作成してください。

【要件】
1. ドリンク調合パラメータ：
   - beanType (int) : 0:エチオピア(原価120円), 1:コロンビア(原価90円), 2:ブラジル(原価70円)
   - espressoVolume (float) : 10〜60ml
   - milkFoamRatio (float) : 0〜100%
   - syrupPushes (int) : 0〜3プッシュ (1個あたり原価30円)
   - sellingPrice (int) : 設定販売価格 (初期値650円)
2. 計算ロジック `RecalculateRecipe()`：
   - 合計原価 (Cost) = 豆原価 + (抽出量 * 1.5) + (ミルク率 * 1.2) + (シロップ * 30)
   - 原価率 (CostRatio) = (合計原価 / 販売価格) * 100
   - 味の評価 (TasteScore: 1.0〜5.0) = 抽出量35ml、ミルク率70%を基準とし、理想値からの離れ具合で減点算出。
3. リアルタイム通知用イベント：
   - System.Action<int, float, float> OnRecipeUpdated; // (原価, 原価率, 味評価)

using System;
using UnityEngine;

public class RecipeDeveloper : MonoBehaviour
{
    public string recipeName = "スペシャルカフェラテ";
    public int beanType = 0; // 0:エチオピア, 1:コロンビア, 2:ブラジル
    public float espressoVolume = 35f; // ml
    public float milkFoamRatio = 70f;  // %
    public int syrupPushes = 1;
    public int sellingPrice = 650;

    // 算出結果
    public int totalCost { get; private set; }
    public float costRatio { get; private set; }
    public float tasteScore { get; private set; }

    public event Action<int, float, float> OnRecipeUpdated;

    private void Start()
    {
        RecalculateRecipe();
    }

    public void RecalculateRecipe()
    {
        // 豆原価の判定
        int beanBaseCost = beanType switch
        {
            0 => 120, // エチオピア
            1 => 90,  // コロンビア
            2 => 70,  // ブラジル
            _ => 90
        };

        // 合計原価の計算
        totalCost = Mathf.RoundToInt(beanBaseCost + (espressoVolume * 1.5f) + (milkFoamRatio * 1.2f) + (syrupPushes * 30));

        // 原価率の計算
        costRatio = sellingPrice > 0 ? ((float)totalCost / sellingPrice) * 100f : 0f;

        // 味の評価スコア算出（理想値：抽出量35ml, ミルク70%）
        float espressoPenalty = Mathf.Abs(espressoVolume - 35f) * 0.05f;
        float milkPenalty = Mathf.Abs(milkFoamRatio - 70f) * 0.03f;
        tasteScore = Mathf.Clamp(5.0f - (espressoPenalty + milkPenalty), 1.0f, 5.0f);

        // イベント発火でUIに即座通知
        OnRecipeUpdated?.Invoke(totalCost, costRatio, tasteScore);
    }

    public void SetEspressoVolume(float val) { espressoVolume = val; RecalculateRecipe(); }
    public void SetMilkFoamRatio(float val) { milkFoamRatio = val; RecalculateRecipe(); }
    public void SetSellingPrice(int price) { sellingPrice = price; RecalculateRecipe(); }
    public void SetBeanType(int type) { beanType = type; RecalculateRecipe(); }
    public void SetSyrupPushes(int pushes) { syrupPushes = pushes; RecalculateRecipe(); }
}

using UnityEngine;
using TMPro;
using UnityEngine.UI;

public class RecipeUIController : MonoBehaviour
{
    [SerializeField] private RecipeDeveloper developer;
    [SerializeField] private TMP_Text costText;
    [SerializeField] private TMP_Text marginText;
    [SerializeField] private TMP_Text ratingText;
    [SerializeField] private Image marginGaugeBar;

    private void OnEnable()
    {
        if (developer != null) developer.OnRecipeUpdated += UpdateUI;
    }

    private void OnDisable()
    {
        if (developer != null) developer.OnRecipeUpdated -= UpdateUI;
    }

    private void UpdateUI(int totalCost, float costRatio, float tasteScore)
    {
        costText.text = $"原価: ￥{totalCost}";
        marginText.text = $"原価率: {costRatio:F1}%";
        ratingText.text = $"味の評価: ★{tasteScore:F1}";

        // 原価率ゲージの色変化（30%以下なら緑、40%以上は赤警告）
        if (marginGaugeBar != null)
        {
            marginGaugeBar.fillAmount = costRatio / 100f;
            marginGaugeBar.color = costRatio > 40f ? Color.red : Color.green;
        }
    }
}

using UnityEngine;

[CreateAssetMenu(fileName = "NewDrinkRecipe", menuName = "Cafe/Drink Recipe")]
public class DrinkRecipeSO : ScriptableObject
{
    public string drinkName;
    public int price;
    public int cost;
    public float tasteRating;

    // 調合詳細データ
    public int beanType;
    public float espressoVolume;
    public float milkFoamRatio;
    public int syrupPushes;
}

// RecipeDeveloper内に追記する保存関数
public void SaveRecipeAsAsset()
{
    DrinkRecipeSO newRecipe = ScriptableObject.CreateInstance<DrinkRecipeSO>();
    newRecipe.drinkName = recipeName;
    newRecipe.price = sellingPrice;
    newRecipe.cost = totalCost;
    newRecipe.tasteRating = tasteScore;
    newRecipe.beanType = beanType;
    newRecipe.espressoVolume = espressoVolume;
    newRecipe.milkFoamRatio = milkFoamRatio;
    newRecipe.syrupPushes = syrupPushes;

    Debug.Log($"新メニュー「{newRecipe.drinkName}」（価格:￥{newRecipe.price} / 評価:★{newRecipe.tasteRating:F1}）を登録しました！");
}