unity3D_牧师与魔鬼

成品图

球体代表牧师，正方体代表魔鬼。

目的

使用unity3D做出一个牧师与魔鬼的游戏，程序需要满足以下要求：

play the game ( http://www.flash-game.net/game/2535/priests-and-devils.html )
列出游戏中提及的事物（Objects）
用表格列出玩家动作表（规则表），注意，动作越少越好
请将游戏中对象做成预制
在 GenGameObjects 中创建长方形、正方形、球及其色彩代表游戏中的对象。
使用 C# 集合类型有效组织对象
整个游戏仅主摄像机和一个 Empty 对象， 其他对象必须代码动态生成！！！ 。整个游戏不许出现 Find 游戏对象， SendMessage 这类突破程序结构的通讯耦合语句。 违背本条准则，不给分
请使用课件架构图编程，不接受非 MVC 结构程序
注意细节，例如：船未靠岸，牧师与魔鬼上下船运动中，均不能接受用户事件！

MVC简介

MVC的全名是Model View Controller，是模型(model)－视图(view)－控制器(controller)的缩写，是一种软件设计典范。它是用一种业务逻辑、数据与界面显示分离的方法来组织代码，将众多的业务逻辑聚集到一个部件里面，在需要改进和个性化定制界面及用户交互的同时，不需要重新编写业务逻辑，达到减少编码的时间。

规则表

动作	条件
开船	船上必须有一个人，船在左岸或者右岸
牧师在左岸上船	左岸必须有牧师，船上有空位，船在左岸
牧师在右岸上船	右岸必须有牧师，船上有空位，船在右岸
牧师在左岸下船	船上有牧师，船在左岸
牧师在右岸下船	船上有牧师，船在有岸
恶魔在左岸上船	左岸必须有恶魔，船上有空位，船在左岸
恶魔在右岸上船	右岸必须有恶魔，船上有空位，船在右岸
恶魔在左岸下船	船上有恶魔，船在左岸
恶魔在右岸下船	船上有恶魔，船在右岸

具体实现

首先在Assets中创建Resources文件夹，在Resources中创建Prefabs文件夹，将做好的对象拖入Prefabs中成为预制。在Assets文件下创建Scripts文件用以放置C#文件。

Director

Director类利用了单例模式，第一次调用getInstance()时，因为instance为null，所以instance会保存一个新的Director对象。往后的每次getInstance()，都会获得相同的值。也就是说所有的C#文件都将获得相同的Director对象，从而可以获得一个相同的controller，实现不同类之间的通信。

//Director.cs
public class Director : System.Object {private static Director instance;public Controller controller;public static Director getInstance(){if (instance == null){instance = new Director();}return instance;}
}

Controller

Controller类实现了IUserActions接口的方法，并通过一个GenGameObject类型的model变量对游戏对象进行操作。Awake()将Controller注入到单实例中。

//IUserActions.cs
public interface IUserActions
{void priestOn();void priestOnEnd();void devilOn();void devilOnEnd();void changeState();int Check();void priestOff();void devilOff();void Restart();
}//Controller.cs
public class Controller : MonoBehaviour, IUserActions
{private GenGameObject model;private void Awake(){Director director = Director.getInstance();director.controller = this;}public void setModel(GenGameObject Model){model = Model;}public void priestOn(){model.priestOn();}public void devilOn(){model.devilOn();}public void changeState(){model.change_state();}public void priestOnEnd(){model.priestOnEnd();}public void devilOnEnd(){model.devilOnEnd();}public int Check(){return model.Check();}public void priestOff(){model.priestOff();}public void devilOff(){model.devilOff();}public void Restart(){model.Restart();}
}

GenGameObject

GenGameObject类定义了一系列变量。其中priests_start保存左岸牧师的游戏对象，priests_end保存右岸牧师的游戏对象，恶魔同理。onBoat用于存储当前船只上物体的数量。boat_state记录船只的状态，boat_state为1时，船不可移动；值为0时，船在左岸；值为2时，船在右岸。船的移动通过Update()调用boatMove()实现，必须满足两个条件，boat_state不为1和游戏正在进行。通过Check()，可以判断游戏是否结束，当Check()返回1时，游戏胜利并结束；返回2时，游戏失败并结束；返回3时游戏进行中。具体代码如下。

//GenGameObject.cs部分代码private Director instance;int onBoat;public int speed;int boat_state = 1;GameObject[] objectOnBoat = new GameObject[2];readonly Vector3 shore_begin = new Vector3(10, 0, 0);readonly Vector3 shore_end = new Vector3(-10, 0, 0);readonly Vector3 boat_begin = new Vector3(-3, 0, 0);readonly Vector3 boat_end = new Vector3(3, 0, 0);readonly Vector3 priests_begin = new Vector3(-9f, 2, 0);readonly Vector3 priests_last = new Vector3(9f, 2, 0);readonly Vector3 devils_begin = new Vector3(-15f, 2, 0);readonly Vector3 devils_last = new Vector3(15f, 2, 0);readonly Vector3 gap = new Vector3(-1.5f, 0, 0);Stack<GameObject> priests_start = new Stack<GameObject>();Stack<GameObject> devils_start = new Stack<GameObject>();Stack<GameObject> priests_end = new Stack<GameObject>();Stack<GameObject> devils_end = new Stack<GameObject>();GameObject boat;

Start()初始化部分变量，并且将GenGameObject注入到单实例中，同时调用Load()实例化所有预制的游戏对象。

//GenGameObject.csprivate void Start(){speed = 10;onBoat = 0;boat_state = 1;instance = Director.getInstance();instance.controller.setModel(this);Load();}private void Load(){Instantiate(Resources.Load("Prefabs/Shore"), shore_begin, Quaternion.identity);Instantiate(Resources.Load("Prefabs/Shore"), shore_end, Quaternion.identity);boat = Instantiate(Resources.Load("Prefabs/Boat"), boat_begin, Quaternion.identity) as GameObject;boat.name = "boat";for (int i = 0; i < 3; i++){GameObject priest = Instantiate(Resources.Load("Prefabs/Priest"), (priests_begin - gap * i), Quaternion.identity) as GameObject;priests_start.Push(priest);GameObject devil = Instantiate(Resources.Load("Prefabs/Devil"), (devils_begin - gap * i), Quaternion.identity) as GameObject;devils_start.Push(devil);}}public int Check(){if (devils_end.Count == 3 && priests_end.Count == 3){return 1;}if ((devils_start.Count > priests_start.Count && priests_start.Count != 0)){if (boat.transform.position == boat_end){return 2;}if (boat.transform.position == boat_begin && onBoat == 0){return 2;}}if ((devils_end.Count > priests_end.Count && priests_end.Count != 0)){if (boat.transform.position == boat_begin){return 2;}if (boat.transform.position == boat_end && onBoat == 0){return 2;}}return 3;}private void Update(){if (Check() == 3){boatMove();}}

priestOn()让左岸的牧师上船，priestOnEnd()让右岸的牧师上船，priestsOff则让牧师下船，恶魔同理。priestsOn()中首先判断priests_start这个栈是否为空，是的话就直接return，不做任何操作。onBoat小于2时，牧师可以上船，同时设置上船牧师的transform.parent为boat.parent,这样改变boat的位置，牧师也会跟着移动。priestOff()通过物体标签tag判断船上物体是否为Priest，从而确定是否让它下船。

    public void priestOn(){if (priests_start.Count == 0)return;if (onBoat < 2){GameObject temp = priests_start.Pop();temp.transform.parent = boat.transform;if (objectOnBoat[0] == null){temp.transform.localPosition = new Vector3(0.3f, 1.5f, 0);objectOnBoat[0] = temp;}else{temp.transform.localPosition = new Vector3(-0.3f, 1.5f, 0);objectOnBoat[1] = temp;}onBoat++;}}public void priestOff(){for (int i = 0; i < 2; i++){if (objectOnBoat[i] != null && objectOnBoat[i].tag == "Priest"){if (boat.transform.position != boat_begin && boat.transform.position != boat_end)return;GameObject pri = objectOnBoat[i];pri.transform.parent = null;if (boat.transform.position == boat_end){pri.transform.position = priests_last + gap * priests_end.Count;priests_end.Push(pri);}else if (boat.transform.position == boat_begin){pri.transform.position = priests_begin - gap * priests_start.Count;priests_start.Push(pri);}objectOnBoat[i] = null;onBoat--;return;}}}

Restart()则通过设置物体对象，让游戏重新开始

    public void Restart(){int num = priests_end.Count;for (int i = 0; i < num; i++){GameObject temp = priests_end.Pop();temp.transform.position = priests_begin - gap * priests_start.Count;priests_start.Push(temp);}num = devils_end.Count;for (int i = 0; i < num; i++){GameObject temp = devils_end.Pop();temp.transform.position = devils_begin - gap * devils_start.Count;devils_start.Push(temp);}for (int i = 0; i < onBoat; i++){if (objectOnBoat[i] == null){i += 1;}GameObject temp = objectOnBoat[i];temp.transform.parent = null;if (temp.tag == "Priest"){temp.transform.position = priests_begin - gap * priests_start.Count;priests_start.Push(temp);}else{temp.transform.position = devils_begin - gap * devils_start.Count;priests_start.Push(temp);}objectOnBoat[i] = null;}onBoat = 0;boat.transform.position = boat_begin;boat_state = 1;}

UserInterface

为界面添加按钮，并调用按钮对应的接口函数

public class UserInterface : MonoBehaviour
{Director instance;IUserActions action;void Start(){
        instance = Director.getInstance();action = instance.controller as IUserActions;}private void OnGUI(){GUIStyle fontStyle = new GUIStyle();fontStyle.fontSize = 40;fontStyle.normal.textColor = new Color(255, 255, 255);if (action.Check() == 1){GUI.Label(new Rect(440, 200, 100, 100), "Win", fontStyle);if (GUI.Button(new Rect(435, 360, 80, 50), "Restart")){action.Restart();}}if (action.Check() == 2){GUI.Label(new Rect(390, 200, 100, 100), "GameOver", fontStyle);if (GUI.Button(new Rect(435, 360, 80, 50), "Restart")){action.Restart();}}if (GUI.Button(new Rect(130, 300, 50, 50), "On")){action.devilOn();}if (GUI.Button(new Rect(270, 300, 50, 50), "On")){action.priestOn();}if (GUI.Button(new Rect(600, 300, 50, 50), "On")){action.priestOnEnd();}if (GUI.Button(new Rect(750, 300, 50, 50), "On")){action.devilOnEnd();}if (GUI.Button(new Rect(450, 300, 50, 50), "Move")){action.changeState();}if (GUI.Button(new Rect(450, 500, 50, 50), "POff")){action.priestOff();}if (GUI.Button(new Rect(450, 600, 50, 50), "DOff")){action.devilOff();}}
}

详细代码

https://github.com/Limsanity/Priest_and_Devils