PoorMonk

官方示例Reguelike的学习笔记

# UnityPracticeProject

单例模式：

     

 1     static public GameManager _instance = null;
 2     void Awake () 
 3     {       
 4         if (_instance == null)
 5         {
 6             _instance = this;
 7         }
 8         else if (_instance != this)
 9         {
10             Destroy(gameObject);
11         }
12         DontDestroyOnLoad(gameObject)；
13     }

 



为player和enemy抽象一个基类来实现移动

    

 1  　　public abstract class MoveObject : MonoBehaviour {
 2 
 3         //start为虚函数，以便在子类中能重写
 4         protected virtual void Start () 
 5         {
 6             boxCollier = GetComponent<BoxCollider2D>();
 7             rb2D = GetComponent<Rigidbody2D>();
 8             inverseMoveTime = 1f / moveTime;
 9         }
10         
11         protected IEnumerator SmoothMovement(Vector3 end)
12         {
13             float sqrRemainingDistance = (transform.position - end).sqrMagnitude;
14     
15             while(sqrRemainingDistance > float.Epsilon)
16             {
17                 Vector3 newPosition = Vector3.MoveTowards(rb2D.position, end, inverseMoveTime * Time.deltaTime);
18                 rb2D.MovePosition(newPosition);
19                 sqrRemainingDistance = (transform.position - end).sqrMagnitude;
20                 yield return null;
21             }
22         }
23     
24         protected bool Move(int xDir, int yDir, out RaycastHit2D hit)
25         {
26             Vector2 start = transform.position;
27             Vector2 end = start + new Vector2(xDir, yDir);
28             boxCollier.enabled = false;
29             hit = Physics2D.Linecast(start, end, blockingLayer); //进行碰撞检测
30             boxCollier.enabled = true;
31             if (hit.transform == null)
32             {
33                 StartCoroutine(SmoothMovement(end));
34                 return true;
35             }
36             return false;
37         }
38     
39         //泛型virtual函数在基类中必须有实现体
40         protected virtual void AttemptMove<T>(int xDir, int yDir)
41             where T : Component
42         {
43             RaycastHit2D hit;
44             bool canMove = Move(xDir, yDir, out hit);
45             if (hit.transform == null)
46                 return;
47             T hitComponent = hit.transform.GetComponent<T>();
48             if (!canMove && hitComponent != null)
49                 OnCantMove(hitComponent);
50         }
51     
52         //泛型abstract函数只能在子类中实现
53         protected abstract void OnCantMove<T>(T component)
54             where T : Component;

 



场景加载

 1 　　if(collision.tag == "Exit")
 2     {
 3         Invoke("Restart", restartLevelDelay); //调用重启函数
 4         enabled = false;
 5     }
 6 
 7     private void Restart()
 8     {
 9         SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex, LoadSceneMode.Single);  //触发场景加载事件      
10     }
11     
12     GameManager类：
13     void OnEnable()
14     {       
15         SceneManager.sceneLoaded += OnSceneLoaded;
16     }
17 
18     void OnSceneLoaded(Scene scene, LoadSceneMode mode)
19     {     
20         InitGame();
21         level++;
22     }

 


     
地图创建

    

 1  　　private List<Vector3> gridPositions = new List<Vector3>();
 2     void InitialiseList()
 3     {
 4         gridPositions.Clear();
 5         for (int x = 1; x < col; x++)
 6         {
 7             for (int y = 1; y < row; y++)
 8             {
 9                 gridPositions.Add(new Vector3(x, y, 0f));
10             }
11         }
12     }
13 
14     Vector3 RandomPosition()
15     {
16         int randomIndex = Random.Range(0, gridPositions.Count - 1); //最后一个格子用来放置过关图标
17         Vector3 randomPosition = gridPositions[randomIndex];
18         gridPositions.RemoveAt(randomIndex); //把随机的格子移除，保证下次随机位置不会重复
19         return randomPosition;
20     }

 

遇到的问题：Exit对象OnTriggerEnter多次触发！

原因：在场景初始化的时候，由于刚开始测试时新建了一个地图一关卡，忘了删除，导致后来程序运行的时候创建了两遍场景（由于位置重叠没有发现），所以在同一个Exit位置，实际上有两个Exit对象，也就触发了两次OnTriggerEnter()函数，导致进入下一关的时候Food直接被清零了。

 

完整的源码：https://github.com/PoorMonk/UnityPracticeProject

posted on 2018-03-29 10:28  PoorMonk  阅读(45)  评论(0)    收藏  举报

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