Unity backgammon game design and simple AI implementation (1)

 1 准备工作：

vs unity ,棋子,一张15*15的棋局.

  Let's drag the prepared picture directly up,Set the lower left point to （0,0）,So set the center point to （7,7）,Because of the center in the figure and the picturepivot不完全吻合,So drag it down a bit,但不影响.

 2 代码部分

1 创建一个Player脚本和player的空物体,将脚本挂到player上 ,The following code can click and give feedback on the position of the click on the chessboard.

  void Update()
    {
        PlayChess();
    }
    void PlayChess()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Vector2 pos  = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            Debug.Log((int)pos.x+" "+(int)pos.y);
        }
    }

2 Prevents clicking outside the board and for a better player experience（Players may click to2the middle of a point）对代码进行修改,posneed to add0.5.

 void PlayChess()
    {
        if (Input.GetMouseButtonDown(0))
        {
            
            Vector2 pos  = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            if (pos.x > 14 || pos.x < 0 || pos.y > 14 || pos.y < 0) return;
             pos.x += (float) 0.5;pos.y += (float)(0.5);
            Debug.Log((int)pos.x+" "+(int)pos.y);
        }
    }

3Create the script afterwardsgametable,创建intA typed array records the points of each chess game.playThe function is responsible for creating the pieces.turnResponsible for judging black or white.

public class gametable : MonoBehaviour
{
    public int[,] grid;
    public ChessType turn;
    public GameObject[] prefabs;
    private static gametable instance;
    public static gametable Instance
    {
        get
        {
            return instance;
        }
    }
        
    
       
    private void Awake()
    {
        grid = new int[15,15];
        if (instance == null)
        {
            instance = this;
            
        }
    }
    private void Update()
    {
        
    }

    public  void  Play(int[] pos)
    {
        grid = new int[15, 15];
        if (grid[pos[0], pos[1]]!=0)return;
        if (turn == ChessType.Black) 
        {
            Instantiate(prefabs[0], new Vector3(pos[0], pos[1], 0), Quaternion.identity);
            turn = ChessType.White;
        }
        else if (turn == ChessType.White)
        {
            Instantiate(prefabs[1], new Vector3(pos[0], pos[1], 0), Quaternion.identity);
            turn = ChessType.Black;

        }

    }

    public enum ChessType
    {
        Watch,
        White,
        Black
    }
}

4设置timer时间控制器,以及在grid中记录位置.

public class gametable : MonoBehaviour
{
    public int[,] grid;
    public ChessType turn;
    public GameObject[] prefabs;
    private static gametable instance;
    public float timer=0;
    public static gametable Instance
    {
        get
        {
            return instance;
        }
    }
        
    
       
    private void Awake()
    {
        grid = new int[15,15];
        if (instance == null)
        {
            instance = this;
            
        }
    }
    private void Update()
    {
        timer += Time.deltaTime;   
    }

    public  void  Play(int[] pos)
    {
       
        if (grid[pos[0], pos[1]]!=0)return;
        if (turn == ChessType.Black) 
        {
            Instantiate(prefabs[0], new Vector3(pos[0], pos[1], 0), Quaternion.identity);
            grid[pos[0], pos[1]] = (int)ChessType.Black;
            turn = ChessType.White;
        }
        else if (turn == ChessType.White)
        {
            Instantiate(prefabs[1], new Vector3(pos[0], pos[1], 0), Quaternion.identity);
            grid[pos[0], pos[1]] = (int)ChessType.White;
            turn = ChessType.Black;

        }

    }

    public enum ChessType
    {
        Watch,
        White,
        Black
    }
}

5在playThe script determines whether it is time to play chess by yourself.

public class Player : MonoBehaviour
{
  public gametable.ChessType chessType;
    void Update()
    {
        if(gametable.Instance.timer>0.3f)
        PlayChess();
    }
    void PlayChess()
    {
        if (Input.GetMouseButtonDown(0))
        {
            
            Vector2 pos  = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            if (pos.x > 14 || pos.x < 0 || pos.y > 14 || 
            pos.y<0||chessType!=gametable.Instance.turn) return;

            pos.x += (float) 0.5;pos.y += (float)(0.5);
            Debug.Log((int)pos.x+" "+(int)pos.y);
            gametable.Instance.Play(new int[2] { (int)pos.x, (int)pos.y });
            gametable.Instance.timer = 0;
        }
            
    }
}

6Finally set two empty objectsplayer 将chesstype分别设置为white blackYou can play chess in turn.

7判断5Sub wins and losses as wellAIThe implementation will be continued in the next article. 

总结：The main problem of Gobang implementation lies in how to distinguish black and white pieces,Record the position of each piece,Prevent repeated chess play,Or out of bounds,Control the timing of each move,Prevent seconds,以及一些bug的出现,Optimize the experience of playing chess.