牧师与魔鬼——动作分离版

在上周的作业中，牧师与魔鬼游戏中的各个事件，都是写在Director中，并且都是继承Monobehavior的。在这周动作分离的设计中，我将上船、下船以及船的移动都分离出来。参照老师给的设计模式，画出简略的UML图如下：

面向对象设计UML图

动作序列

在这里的设计中，参照之前师兄的设计模式，可以将动作序列分成如下几个:

文件名	功能
CCActionManager	具体动作作为类中的一个对象从而管理动作，同时继承SSActionManager
CCBoatMoving	船移动的具体方法，继承SSAction，将GenGameObject作为其中一个对象
CCGetOffBoat	牧师或魔鬼对象下船的具体方法，继承SSAction，其中的对象有int型判断河岸，与GameObject型对象接收具体作用的游戏对象
CCGetOnTheBoat	牧师或魔鬼对象上船的具体方法，继承SSAction，其中的对象有GameObject型接收具体作用的游戏对象

CCActionManager

CCActionManager是对具体游戏事件的控制，其中包含三个方法：Start()，Update()，和SSActionEvent()。Start()方法中用于将SSDirector实例化，Update()方法中用于实现具体的游戏事件，SSActionEvent()方法则是接口ISSActionCallback中的。
具体代码如下：

public class CCActionManager : SSActionManager, ISSActionCallback
{public GenGameObject sceneController;public CCGetOnTheBoat getonA;public CCGetOffBoat getoffB;public CCBoatMoving boatmovingC;// Use this for initializationprotected void Start(){sceneController = (GenGameObject)SSDirector.getInstance().currentScenceController;sceneController.actionManager = this;}// Update is called once per frameprotected new void Update(){if (Input.GetMouseButtonDown(0) && sceneController.game == 0){Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);RaycastHit hit;if (Physics.Raycast(ray, out hit)){if (hit.transform.tag == "Devil" || hit.transform.tag == "Priest"){if (hit.collider.gameObject == sceneController.boat[0] || hit.collider.gameObject == sceneController.boat[1]){if (hit.collider.gameObject == sceneController.boat[0]){getoffB = CCGetOffBoat.GetSSAction(0);this.RunAction(hit.collider.gameObject, getoffB, this);}else{getoffB = CCGetOffBoat.GetSSAction(1);this.RunAction(hit.collider.gameObject, getoffB, this);}}else{getonA = CCGetOnTheBoat.GetSSAction();this.RunAction(hit.collider.gameObject, getonA, this);}}else if (hit.transform.tag == "Boat" && sceneController.boatCapacity != 2){print(hit.transform.tag);boatmovingC = CCBoatMoving.GetSSAction();this.RunAction(hit.collider.gameObject, boatmovingC, this);}}}base.Update();}public void SSActionEvent(SSAction source, SSActionEventType events = SSActionEventType.Competeted,int intParam = 0, string strParam = null, Object objectParam = null){//}
}

具体游戏事件实现方法

具体的事件类有三个，分别是，CCBoatMoving、CCGetOffBoat和CCGetOnTheBoat。以下是三个事件的代码：
CCBoatMoving的代码：

\\CCBoatMoving
public class CCBoatMoving : SSAction
{public GenGameObject sceneController;public static CCBoatMoving GetSSAction(){CCBoatMoving action = ScriptableObject.CreateInstance<CCBoatMoving>();return action;}// Use this for initializationpublic override void Start(){sceneController = (GenGameObject)SSDirector.getInstance().currentScenceController;}// Update is called once per framepublic override void Update(){if (sceneController.boat_position == 1){sceneController.boat_position = 0;while (this.transform.position != sceneController.boatStartPos)this.transform.position = Vector3.MoveTowards(this.transform.position, sceneController.boatStartPos, 1);}else if (sceneController.boat_position == 0){sceneController.boat_position = 1;while (this.transform.position != sceneController.boatEndPos)this.transform.position = Vector3.MoveTowards(this.transform.position, sceneController.boatEndPos, 1);}sceneController.check();this.destroy = true;this.callback.SSActionEvent(this);}
}

CCGetOffBoat的代码：

public class CCGetOffBoat : SSAction
{public int side;public GenGameObject sceneController;public static CCGetOffBoat GetSSAction(int side){CCGetOffBoat action = ScriptableObject.CreateInstance<CCGetOffBoat>();action.side = side;return action;}// Use this for initializationpublic override void Start(){sceneController = (GenGameObject)SSDirector.getInstance().currentScenceController;}// Update is called once per framepublic override void Update(){if (sceneController.boat[side] != null){sceneController.boat[side].transform.parent = null;if (sceneController.boat_position == 1){if (sceneController.boat[side].transform.tag == "Priest"){for (int i = 0; i < 3; i++){if (sceneController.priests_end[i] == null){sceneController.priests_end[i] = sceneController.boat[side];sceneController.boatCapacity++;break;}}}else if (sceneController.boat[side].transform.tag == "Devil"){for (int i = 0; i < 3; i++){if (sceneController.devils_end[i] == null){sceneController.devils_end[i] = sceneController.boat[side];sceneController.boatCapacity++;break;}}}}else if (sceneController.boat_position == 0){if (sceneController.boat[side].transform.tag == "Priest"){for (int i = 0; i < 3; i++){if (sceneController.priests_start[i] == null){sceneController.priests_start[i] = sceneController.boat[side];sceneController.boatCapacity++;break;}}}else if (sceneController.boat[side].transform.tag == "Devil"){for (int i = 0; i < 3; i++){if (sceneController.devils_start[i] == null){sceneController.devils_start[i] = sceneController.boat[side];sceneController.boatCapacity++;break;}}}}sceneController.boat[side] = null;}sceneController.check();this.destroy = true;this.callback.SSActionEvent(this);}
}

CCGetOnTheBoat的代码如下：

public class CCGetOnTheBoat : SSAction
{public GenGameObject sceneController;public static CCGetOnTheBoat GetSSAction(){CCGetOnTheBoat action = ScriptableObject.CreateInstance<CCGetOnTheBoat>();return action;}// Use this for initializationpublic override void Start(){sceneController = (GenGameObject)SSDirector.getInstance().currentScenceController;}// Update is called once per framepublic override void Update(){if (sceneController.boatCapacity != 0){if (sceneController.boat_position == 0){for (int i = 0; i < 3; i++){if (sceneController.devils_start[i] == gameobject){sceneController.devils_start[i] = null;sceneController.find = 1;}if (sceneController.priests_start[i] == gameobject){sceneController.priests_start[i] = null;sceneController.find = 1;}}}else if (sceneController.boat_position == 1){for (int i = 0; i < 3; i++){if (sceneController.devils_end[i] == gameobject){sceneController.devils_end[i] = null;sceneController.find = 1;}if (sceneController.priests_end[i] == gameobject){sceneController.priests_end[i] = null;sceneController.find = 1;}}}if (sceneController.find == 1)gameobject.transform.parent = sceneController.boat_obj.transform;if (sceneController.boat[0] == null && sceneController.find == 1){sceneController.boat[0] = gameobject;sceneController.boat[0].transform.tag = gameobject.transform.tag;sceneController.boatCapacity--;this.transform.localPosition = new Vector3(0, 1.2f, 0.19f);}else if (sceneController.boat[1] == null && sceneController.find == 1){sceneController.boat[1] = gameobject;sceneController.boat[1].transform.tag = gameobject.transform.tag;sceneController.boatCapacity--;this.transform.localPosition = new Vector3(0, 1.2f, -0.12f);}}sceneController.find = 0;this.destroy = true;this.callback.SSActionEvent(this);}
}

这三个具体的类全都继承SSAction类，也同时在Start()函数中实例化了SSDirector。在Update中则是各自完成各自操作的。

动作事件基本类型及回调

这一部分是定义在SSAction中的，其中SSActionEventType是一个枚举型，ISSActionCallback是一个接口，其中定义了函数SSActionEvent。具体代码如下：

public enum SSActionEventType : int { Started, Competeted }public interface ISSActionCallback
{void SSActionEvent(SSAction source, SSActionEventType events = SSActionEventType.Competeted,int intParam = 0, string strParam = null, Object objectParam = null);
}

参考老师给出的SSAction，SSAction类的具体代码为：

public class SSAction : ScriptableObject
{public bool enable = true;public bool destroy = false;public GameObject gameobject { get; set; }public Transform transform { get; set; }public ISSActionCallback callback { get; set; }protected SSAction() { }public virtual void Start(){throw new System.NotImplementedException();}public virtual void Update(){throw new System.NotImplementedException();}
}

而在SSActionManager中，我绝大多数是按照老师课件上写的代码来的。我对SSActionManager的理解是，一个Action的队列，在队列中有等待处理的事件，以及处理完毕之后等待删除的事件。在其中的RunAction函数中，接收GameObject、SSAction的实例化和ISSActionCallback的回调接口，作用是将等待处理的游戏对象加入到队列中，用SSAction来处理事件。具体的代码如下：

public class SSActionManager : MonoBehaviour
{private Dictionary<int, SSAction> actions = new Dictionary<int, SSAction>();private List<SSAction> waitingAdd = new List<SSAction>();private List<int> waitingDelete = new List<int>();// Use this for initializationvoid Start(){}// Update is called once per frameprotected void Update(){foreach (SSAction ac in waitingAdd)actions[ac.GetInstanceID()] = ac;waitingAdd.Clear();foreach (KeyValuePair<int, SSAction> kv in actions){SSAction ac = kv.Value;if (ac.destroy){waitingDelete.Add(ac.GetInstanceID());}else if (ac.enable){ac.Update();}}foreach (int key in waitingDelete){SSAction ac = actions[key]; actions.Remove(key); DestroyObject(ac);}waitingDelete.Clear();}public void RunAction(GameObject gameobject, SSAction action, ISSActionCallback manager){action.gameobject = gameobject;action.transform = gameobject.transform;action.callback = manager;waitingAdd.Add(action);action.Start();}
}

加载资源、点击事件以及用户GUI

这几部分和之前作业全部相同，几乎没有改变，结合这星期学习的游戏场景，我加上了SkyBox。放上几张成品图：

当游戏成功时显示：

在本次作业中，主要是了解到了面向对象的编程方法。其实对于我本人来说，我对面向对象在刚开始学习的时候真的挺吃力的。各个部分太多，经常忘了各部分的分工和实现。这是我在学习碰上的主要问题。在往年师兄的代码和老师上课课件的参考下，我把需要的具体的动作序列类和动作管理类写在纸上，用UML图表示出其中关系的时候，才认识到面向对象编程的博大精深、真是太机智了，对代码的利用和复用达到了极大值。
这是程序的传送门