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炉灶预制件
首先制作一个柜台，创建一个柜台的预制件变体，并拖入 StoveCounter_Visual。这里还需要复制一遍这一预制件变体，并为其中的 Counter、Stove 和 Frying Pan 换上 CounterSelected 偏白色的材质，用于表示对象被选中。
public class StoveCounter : BaseCounter {
[SerializeField] private FryingRecipeSO[] fryingRecipeSOArray;
public override void Interact (Player player) { if (!HasKitchenObject()) { // There is no KitchenObject here if (player. HasKitchenObject()) { // Player is carrying something if (HasRecipeWithInput(player. GetKitchenObject().GetKitchenObjectSO())) { // Player carrying something that can be Fried player.GetKitchenObject().SetKitchenObjectParent(this);
fryingRecipeSO = GetFryingRecipeSOWithInput(GetKitchenObject().GetKitchenObjectSO()); } } else { // Player not carrying anything } } else { // There is a KitchenObject here if (player. HasKitchenObject ()) { // Player is carrying something } else { // Player is not carrying anything GetKitchenObject().SetKitchenObjectParent(player); } } } 煎炸计时器有两种写法，一种是简单的浮点计时器，当计时器的时间大于此前设定的最大值，肉就煎好了：
private float fryingTimer;private FryingRecipeSO fryingRecipeSO;
private void Update() { if (HasKitchenObject()) { fryingTimer += Time.deltaTime; if (fryingTimer > fryingRecipeSO.fryingTimerMax) { // Fried fryingTimer = of; Debug.Log("Fried!"); GetKitchenObject().DestroySelf();
KitchenObject.SpawnKitchenObject(fryingRecipeSO.output,this); } Debug. Log(fryingTimer);} }}private void Start() { StartCoroutine(HandleFryTimer());}
private IEnumerator HandleFryTimer () { yield return new WaitForSeconds(1f);}private enum State { Idle, Frying, Fried, Burned,}private State state;private float fryingTimer;private FryingRecipeSO fryingRecipeSO;
private void Start() { state = State.Idle;}
private void Update() { if (HasKitchenObject ()) { switch (state) { case State.Idle: break; case State.Frying: fryingTimer += Time.deltaTime; if (fryingTimer › fryingRecipeSO.fryingTimerMax) { // Fried GetKitchenObject () .DestroySelf();
KitchenObject.SpawnKitchenObject(fryingRecipeSO.output,this);
Debug. Log("Object fried!"); state = State. Fried; } break; case State.Fried: break; case State. Burned: break; } Debug. Log (state); }}并在玩家与炉灶互动的逻辑中也添加上，如果放下的物品是可以煎炸的，就把状态设为 State.Frying，并且重置计时器。
if (HasRecipeWithInput(player.GetKitchenObject().GetKitchenObjectSO())) { // Player carrying something that can be Fried player.GetKitchenObject().SetKitchenObjectParent(this);
fryingRecipeSO = GetFryingRecipeSOWithInput(GetKitchenObject().GetKitchenObjectSO());
state = State.Frying; fryingTimer = Of;}继续制作烤焦状态，与煎炸状态的逻辑类似，只需创建一个新的 FryingTimer 计时器，及 BurningRecipeSO 可编程对象 MeatPattyCooked-MeatPattyBurned，将输入与输出分别配置为 MeatPattyCooked 和 MeatPattyBurned，计时器最长时间设为 5 秒。
state = State. Fried; burningTimer = Of; burningRecipeSO = GetBurningRecipesOWithInput(GetKitchenObject () .GetKitchenObjectSO ()); } break;case State.Fried: burningTimer += Time.deltaTime; if (burningTimer > burningRecipeSO.burningTimerMax) { GetKitchenObject ().DestroySelf();
KitchenObject.SpawnKitchenObject(burningRecipesO.output,this);
Debug.Log("Object Burned!"); state = State.Burned; }添加火炉开启的图像预制件 StoveOnVisual （加上泛光 Bloom 效果），并用粒子系统制作火星的粒子效果 SizzlingParticles。
为它们新建脚本 StoveCounterVisual，以实现炉子开启时就出现发光及火星的效果。这里用事件 OnStageChanged 来触发效果，每当煎肉炉的状态变化，就触发该事件；当状态为 Frying 或 Fried 时，就显示这两个效果对象。
public class StoveCounterVisual : MonoBehaviour {
[SerializeField] private StoveCounter stoveCounter; [SerializeField] private GameObject stoveOnGameObject; [SerializeField] private GameObject particlesGameObject;
private void Start() { stoveCounter.OnStateChanged += StoveCounter_OnStateChanged; } private void StoveCounter_OnStateChanged(object sender, StoveCounter.OnStateChangedEventArgs e) { bool showVisual = e.state == StoveCounter.State.Frying || e.state == StoveCounter.State. Fried; stoveOnGameObject.SetActive(showVisual); particlesGameObject. SetActive(showVisual); }
}进度条
public interface IHasProgress {
public event EventHandler<OnProgressChangedEventArgs> OnProgressChanged; public class OnProgressChangedEventArgs : EventArgs { public float progressNormalized; }
}将其应用到炉灶柜上，把 ProgressBarUI 预制件拖入到 StoveCounter 预制件，再把 StoveCounter 拖入 ProgressBarUI 脚本中的 Has Progress Game Object 字段。在 StoveCounter 脚本中应用这个接口：
public class StoveCounter: BaseCounter, IHasProgress {public event EventHandler<IHasProgress.OnProgressChangedEventArgs>OnProgressChanged;在每次进入 Frying 和 Fried 状态时触发这个事件，修改进度量，并显示进度条。
OnProgressChanged?. Invoke (this, new IHasProgress. OnProgressChangedEventArgs { progressNormalized = fryingTimer / fryingRecipeSO.fryingTimerMax});在 Burned 状态下隐藏进度条。当玩家中途拿起食材时，状态重置，进度条隐藏。
OnProgressChanged?. Invoke(this, new IHasProgress.OnProgressChangedEventArgs { progressNormalized = 0f});这套教程目前已更新至第 30 课，完成了一款烹饪游戏中厨房物品、切菜柜、垃圾柜、炉灶柜、盘子等系统和功能的制作。点击阅读原文到 Unity 中文课堂立即免费学习吧！
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