打飞碟小游戏

这次的主要任务是写一个打飞碟的小游戏，熟悉一下之前的MVC模式和动作分离，可以复用一部分前面的代码。

游戏场景截图

这次建立了一个简单的天空盒和地面。场记依旧加载到空对象GameObject上，并且控制飞碟加载。

代码组织结构

1. 这次代码的核心是Disk和DiskFactory，也就是用工厂模式来控制物体的产生和复用。

   • Disk类：储存了一些基本属性，并且可以通过这些属性直接修改gameObject的属性。

       public class Disk : MonoBehaviour {public Vector3 StartPoint { get { return gameObject.transform.position; } set { gameObject.transform.position = value; } }public Color color { get { return gameObject.GetComponent<Renderer>().material.color; } set { gameObject.GetComponent<Renderer>().material.color = value; } }public float speed { get;set; }public Vector3 Direction { get { return Direction; } set { gameObject.transform.Rotate(value); } }}

   • DiskFactory类：Disk的道具工厂，减少游戏对象的销毁次数，复用游戏对象，且屏蔽创建和销毁的业务逻辑，使程序易于扩展。具体在这个代码中，DiskFactory还负责在生产Disk时随机指定起始位置，方向，速度，颜色。

    public class DiskFactory { //开始时继承了MonoBehaviour后来发现不继承也可以public GameObject diskPrefab;public static DiskFactory DF = new DiskFactory();private Dictionary<int, Disk> used = new Dictionary<int, Disk>();//used是用来保存正在使用的飞碟 private List<Disk> free = new List<Disk>();//free是用来保存未激活的飞碟 private DiskFactory(){diskPrefab = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("Prefabs/disk"));//获取预制的游戏对象diskPrefab.AddComponent<Disk>();diskPrefab.SetActive(false);}public void FreeDisk(){foreach (Disk x in used.Values){if (!x.gameObject.activeSelf){free.Add(x);used.Remove(x.GetInstanceID());return;}}}public Disk GetDisk(int round)  {FreeDisk();GameObject newDisk = null;Disk diskdata;if (free.Count > 0){//从之前生产的Disk中拿出可用的newDisk = free[0].gameObject;free.Remove(free[0]);}else{//克隆预制对象，生产新DisknewDisk = GameObject.Instantiate<GameObject>(diskPrefab, Vector3.zero, Quaternion.identity);}newDisk.SetActive(true);diskdata = newDisk.AddComponent<Disk>();int swith;/** * 根据回合数来生成相应的飞碟,难度逐渐增加。*/float s;if (round == 1){swith = Random.Range(0, 3);s = Random.Range(30, 40);}else if (round == 2){swith = Random.Range(0, 4);s = Random.Range(40, 50);}else {swith = Random.Range(0, 6);s = Random.Range(50, 60);} switch (swith)  {  case 0:  {  diskdata.color = Color.yellow;  diskdata.speed = s;  float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;  diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(-130, -110), Random.Range(30,90), Random.Range(110,140));break;  }  case 1:  {  diskdata.color = Color.red;  diskdata.speed = s + 10;  float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;  diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(-130, -110), Random.Range(30, 80), Random.Range(110, 130));break;  }  case 2:  {  diskdata.color = Color.black;  diskdata.speed = s + 15;  float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;  diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(-130,-110), Random.Range(30, 70), Random.Range(90, 120));break;  }case 3:{diskdata.color = Color.yellow;diskdata.speed = -s;float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(130, 110), Random.Range(30, 90), Random.Range(110, 140));break;}case 4:{diskdata.color = Color.red;diskdata.speed = -s - 10;float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(130, 110), Random.Range(30, 80), Random.Range(110, 130));break;}case 5:{diskdata.color = Color.black;diskdata.speed = -s - 15;float RanX = UnityEngine.Random.Range(-1f, 1f) < 0 ? -1 : 1;diskdata.Direction = new Vector3(RanX, 1, 0);diskdata.StartPoint = new Vector3(Random.Range(130, 110), Random.Range(30, 70), Random.Range(90, 120));break;}}used.Add(diskdata.GetInstanceID(), diskdata); //添加到使用中diskdata.name = diskdata.GetInstanceID().ToString();return diskdata;  }
}

1. 上次已经写过了运动分离版的牧师与魔鬼了，这次可以将一部分运动分离的代码直接复用，主要的修改就是重写MoveToAction使Disk做类似有水平初速自由落体的运动（其实可以用刚体属性然后添加重力，此处我为了少修改代码而没有选择使用），然后重写一下具体在这个场景中的CCActionManager类。下面是重写的代码：

   • 重写的MoveToAction类：

       public class CCMoveToAction : SSAction{public float speedx;public float speedy = 0;private CCMoveToAction() { }public static CCMoveToAction getAction(float speedx){CCMoveToAction action = CreateInstance<CCMoveToAction>();action.speedx = speedx;return action;}public override void Update(){//模拟加速度为10的抛物线运动this.transform.position += new Vector3(speedx*Time.deltaTime, -speedy*Time.deltaTime+(float)-0.5*10*Time.deltaTime*Time.deltaTime,0);speedy += 10*Time.deltaTime;if (transform.position.y <= 1)//被点击和运动到地面都满足回收条件{destroy = true;CallBack.SSActionCallback(this);}}public override void Start(){}}

   • 重写的CCActionManager类：

       using Interfaces;public class CCActionManager : SSActionManager, SSActionCallback{int count = 0;//记录所有在移动的碟子的数量public SSActionEventType Complete = SSActionEventType.Completed;public void MoveDisk(Disk Disk){count++;Complete = SSActionEventType.Started;CCMoveToAction action = CCMoveToAction.getAction(Disk.speed);addAction(Disk.gameObject,action,this);}public void SSActionCallback(SSAction source) //运动事件结束后的回调函数{count--;Complete = SSActionEventType.Completed;source.gameObject.SetActive(false);}public bool IsAllFinished() //主要为了防止游戏结束时场景还有对象但是GUI按钮已经加载出来{if (count == 0) return true;else return false;}}

2. 重写一下Interfaces，根据交互的需要定义函数。

       namespace Interfaces{public interface ISceneController{void LoadResources();}public interface UserAction{void Hit(Vector3 pos); // 发生点击事件，传送点击位置给场记void Restart();//重新开始游戏int GetScore();bool RoundStop();void RoundPlus();}public enum SSActionEventType : int { Started, Completed }public interface SSActionCallback{void SSActionCallback(SSAction source);}}

3. 最后最重要的就是重写场记了，导演和之前还是一样的。

       using System.Collections;using System.Collections.Generic;using UnityEngine;using Interfaces;public class FirstSceneController : MonoBehaviour, ISceneController, UserAction{int score = 0;int round = 1;int tral = 0;bool start = false;CCActionManager Manager;DiskFactory DF;void Awake(){SSDirector director = SSDirector.getInstance();director.currentScenceController = this;DF = DiskFactory.DF;Manager = GetComponent<CCActionManager>();}// Use this for initializationvoid Start () {}// Update is called once per frameint count = 0;void Update () {if(start == true){count++;if (count >= 80){count = 0;if(DF == null){Debug.LogWarning("DF is NUll!");return;}tral++;Disk d = DF.GetDisk(round);Manager.MoveDisk(d);if (tral == 10){round++;tral = 0;}}}}public void LoadResources(){}public void Hit(Vector3 pos){Ray ray = Camera.main.ScreenPointToRay(pos);RaycastHit[] hits;hits = Physics.RaycastAll(ray);for (int i = 0; i < hits.Length; i++){RaycastHit hit = hits[i];if (hit.collider.gameObject.GetComponent<Disk>() != null){Color c = hit.collider.gameObject.GetComponent<Renderer>().material.color;if (c == Color.yellow) score += 1;if (c == Color.red) score += 2;if (c == Color.black) score += 3;hit.collider.gameObject.transform.position = new Vector3(0, -5, 0);}}}public int GetScore(){return score;}public void Restart(){score = 0;round = 1;start = true;}public bool RoundStop(){if (round > 3){start = false;return Manager.IsAllFinished();}else return false;}public int GetRound(){return round;}}

4. 用户界面GUI，这次GUI还算简单，主要加了显示分数，时间，以及轮次的面板。

    public class InterfaceGUI : MonoBehaviour {UserAction UserActionController;public GameObject t;bool ss = false;float S;float Now;int round = 1;// Use this for initializationvoid Start () {UserActionController = SSDirector.getInstance().currentScenceController as UserAction;S = Time.time;}private void OnGUI(){if(!ss) S = Time.time;GUI.Label(new Rect(1000, 50, 500, 500),"Score: " + UserActionController.GetScore().ToString() + "  Time:  " + ((int)(Time.time - S)).ToString() + "  Round:  " + round );if (!ss && GUI.Button(new Rect(Screen.width / 2 - 30, Screen.height / 2 - 30, 100, 50), "Start")){S = Time.time;ss = true;UserActionController.Restart();}if (ss){round = UserActionController.GetRound();if (Input.GetButtonDown("Fire1")){Vector3 pos = Input.mousePosition;UserActionController.Hit(pos);}if (round > 3){round = 3;if (UserActionController.RoundStop()){ss = false;}}}}}

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