chip-game/Assets/Scripts/FieldModel.cs

using System;
using UnityEngine;

public enum CellState
{
    Empty, Player1, Player2
}
public class FieldModel
{
    //äâóìåðíûé ìàññèâ äëÿ ïîëÿ
    public CellState[,] fieldArr;
    public int height, width;


    // Êåøèðîâàííûå ìàññèâû äëÿ èçáåæàíèÿ àëëîêàöèé
    private static readonly int[] tempIndexesRow = new int[4];
    private static readonly int[] tempIndexesColumn = new int[4];

    public FieldModel(int width, int height)
    {
        //0 èíäåêñ äëÿ ñòðîê, 1 èíäåêñ äëÿ ñòîëáöîâ
        this.width = width;
        this.height = height;
        makeEmptyField(width, height);
    }

    public void makeEmptyField(int width, int height)
    {
        fieldArr = new CellState[height, width];
        Array.Clear(fieldArr, 0, fieldArr.Length);
    }

    //Îñíîâíûå ïðîâåðêè ñ ðàçâåðíóòûì ðåçóëüòàòîì
    public CheckResult check(int row, int col)
    {
        CheckResult result;

        result = checkRow(row);
        if (result.end) return result;

        result = checkColumn(col);
        if (result.end) return result;

        result = checkDiagonalDownUp(row, col);
        if (result.end) return result;

        result = checkDiagonalUpDown(row, col);
        if (result.end) return result;

        if (checkDraw())
        {
            return new CheckResult(true, true);
        }

        return result;
    }
    public CheckResult checkRow(int row)
    {
        CellState currentPlayer = GameManager.instance.currentPlayer;


        int lineLength = 0;
        for (int col = 0; col < width; col++)
        {
            CellState cell = fieldArr[row, col];
            if (cell != currentPlayer)
            {
                lineLength = 0;
                continue;
            }
            lineLength++;
            
            if (lineLength == 4)//íàøëè ðÿä èç 4 ôèøåê
            {
                //ìàññèâû ÷òîáû çàïîìíèòü èç-çà êàêîé êîìáèíàöèè ïðîèçîøëà ïîáåäà
                //int[] indexesRow = new int[4];
                //int[] indexesColumn = new int[4];
                for (int i = 0; i < 4; i++)
                {
                    //indexesColumn[i] = col - i;
                    //indexesRow[i] = row;
                    tempIndexesColumn[i] = col - i;
                    tempIndexesRow[i] = row;
                }
                return new CheckResult(true, false, tempIndexesRow, tempIndexesColumn);
            }
        }
        return new CheckResult(false, false);//íå íàøëè êîìáèíàöèþ
    }
    public CheckResult checkColumn(int column)
    {
        CellState currentPlayer = GameManager.instance.currentPlayer;
        int lineLength = 0;
        for (int row = height - 1; row >= 0; row--)
        {
            CellState cell = fieldArr[row, column];
            if (cell != currentPlayer)
            {
                lineLength = 0;
                continue;
            }
            lineLength++;

            if (lineLength == 4)//íàøëè ðÿä èç 4 ôèøåê
            {
                for (int i = 0; i < 4; i++)
                {
                    tempIndexesColumn[i] = column;
                    tempIndexesRow[i] = row + i;
                }
                return new CheckResult(true,false,tempIndexesRow, tempIndexesColumn);
            }
        }
        return new CheckResult(false, false);//íå íàøëè êîìáèíàöèþ

    }
    public CheckResult checkDiagonalDownUp(int row, int col)
    {
        CellState currentPlayer = GameManager.instance.currentPlayer;
        int sum = row + col;

        // Äèàãîíàëü ñëèøêîì êîðîòêàÿ, åñëè ñóììà ìåíüøå ìèíèìàëüíîé (3) èëè áîëüøå ìàêñèìàëüíîé (height+width-4)
        if (sum < 3 || sum > height + width - 4)
            return new CheckResult(false, false);

        // Âû÷èñëÿåì íà÷àëüíóþ òî÷êó äèàãîíàëè
        int startRow = Mathf.Clamp(sum, 0, height - 1);
        int startCol = Mathf.Clamp(sum - (height - 1), 0, width - 1);

        int lineLength = 0;

        for (row = startRow, col = startCol; row >= 0 && col < width; row--, col++)
        {
            CellState cell = fieldArr[row, col];
            if (cell != currentPlayer)
            {
                lineLength = 0;
                continue;
            }
            lineLength++;
            if (lineLength == 4)
            {
                for (int i = 0; i < 4; i++)
                {
                    tempIndexesRow[i] = row + i;
                    tempIndexesColumn[i] = col - i;
                }
                return new CheckResult(true, false, tempIndexesRow, tempIndexesColumn);
            }
        }
        return new CheckResult(false, false);
    }
    public CheckResult checkDiagonalUpDown(int row, int col)
    {
        CellState currentPlayer = GameManager.instance.currentPlayer;
        int sub = row - col;

        // Íà÷àëüíàÿ òî÷êà äèàãîíàëè, ïðîõîäÿùåé ÷åðåç (row, col)
        int startRow = sub >= 0 ? sub : 0;
        int startCol = sub >= 0 ? 0 : -sub;

        int lineLength = 0;

        for (row = startRow, col = startCol; row < height && col < width; row++, col++)
        {
            CellState cell = fieldArr[row, col];
            if (cell != currentPlayer)
            {
                lineLength = 0;
                continue;
            }
            lineLength++;
            if (lineLength == 4)
            {
                for (int i = 0; i < 4; i++)
                {
                    tempIndexesColumn[i] = col - i;
                    tempIndexesRow[i] = row - i;
                }
                return new CheckResult(true, false, tempIndexesRow, tempIndexesColumn);
            }
        }
        return new CheckResult(false, false);
    }

    public int getHeight(int colIndex)
    {
        //ïåðåáèðàåì ðÿäû äëÿ âûáðàííîé êîëîíêè
        //èùåì ñàìûé íèæíèé ñëîò â êîëîíêå, êóäà ìîæåì âñòàâèòü ôèøêó
        for (int row = height-1; row >= 0; row--) 
        {
            if (fieldArr[row, colIndex] == CellState.Empty)
            {
                return row;
            }
        }
        return -1;//åñëè íå íàøëè, òî áîëüøå äîáàâèòü íåëüçÿ
    }
   
    //ïðîâåðêà íè÷üåé
    public bool checkDraw()
    {
        for (int col = 0; col < width; col++)
        {
            //åñëè åñòü õîòü îäíà íåïóñòàÿ êîëîíêà òî èãðà ïðîäîëæàåòñÿ
            if (getHeight(col) != -1) return false;
        }
        return true;
    }
}