/// <summary>
/// GetCaptures - Получить захваты
/// Generate captures list for the piece at the given location
/// Создать список снимков для произведения в заданном месте
/// </summary>
/// <param name="moves">
/// stores the list of moves generated
/// сохраняет список сгенерированных ходов
/// </param>
/// <param name="locations">
/// list of parent locations
/// список родительских локаций
/// </param>
/// <param name="board">
/// the board state
/// состояние правления
/// </param>
/// <param name="piece">
/// the piece
/// кусок
/// </param>
/// <param name="row">
/// the row of the piece
/// строка произведения
/// </param>
/// <param name="col">
/// the column of the piece
/// столбец произведения
/// </param>
/// <param name="dx">
/// the horizontal direction
/// горизонтальное направление
/// </param>
/// <param name="dy">
/// the vertical direction
/// вертикальное направление
/// </param>
/// <returns><c>true</c>
/// if capture available
/// если захват доступен
/// </returns>
private static bool GetCaptures(ICollection <Move> moves, IList <Location> locations, IBoard board, Piece piece, int row, int col, int dx, int dy)
{
int endRow = row + dy * 2;
int endCol = col + dx * 2;
int jumpRow = row + dy;
int jumpCol = col + dx;
// jump available
// прыжок доступен
if (InBounds(endRow, endCol, board) && BoardUtilities.AreOpponents(piece, board[jumpRow, jumpCol]) && BoardUtilities.IsEmpty(board[endRow, endCol]))
{
locations.Add(new Location(endRow, endCol));
board[row, col] = Piece.None;
board[jumpRow, jumpCol] = Piece.None;
board[endRow, endCol] = piece;
bool captureAvailable = false;
int[] DIRECTIONS = { -1, 1 }; // {down/right, up/left} // {вниз / вправо, вверх / влево}
int Y_START_INDEX = (BoardUtilities.IsKing(piece) || BoardUtilities.IsWhite(piece)) ? 0 : 1;
int Y_END_INDEX = (BoardUtilities.IsKing(piece) || BoardUtilities.IsBlack(piece)) ? 1 : 0;
for (int idxY = Y_START_INDEX; idxY <= Y_END_INDEX; idxY++)
{
for (int idxX = 0; idxX < DIRECTIONS.Length; idxX++)
{
bool result = GetCaptures(
moves, new List <Location>(locations),
board.Copy(), piece,
endRow, endCol, DIRECTIONS[idxX], DIRECTIONS[idxY]
);
captureAvailable = captureAvailable || result;
}
}
if ((!captureAvailable) && (locations.Count > 1))
{
Move move = new Move();
foreach (Location location in locations)
{
move.AddMoves(location);
}
moves.Add(move);
}
return(true);
}
else
{
return(false);
}
}
/// <summary>Generate captures list for the piece at the given location</summary>
/// <param name="moves">stores the list of moves generated</param>
/// <param name="locations">list of parent locations</param>
/// <param name="board">the board state</param>
/// <param name="piece">the piece</param>
/// <param name="row">the row of the piece</param>
/// <param name="col">the column of the piece</param>
/// <param name="dx">the horizontal direction</param>
/// <param name="dy">the vertical direction</param>
/// <returns><c>true</c> if capture available</returns>
private static bool GetCaptures(ICollection <Move> moves, IList <Location> locations, IBoard board, Piece piece, int row, int col, int dx, int dy)
{
int endRow = row + dy * 2;
int endCol = col + dx * 2;
int jumpRow = row + dy;
int jumpCol = col + dx;
// jump available
if (InBounds(endRow, endCol, board) && BoardUtilities.AreOpponents(piece, board[jumpRow, jumpCol]) && BoardUtilities.IsEmpty(board[endRow, endCol]))
{
locations.Add(new Location(endRow, endCol));
board[row, col] = Piece.None;
board[jumpRow, jumpCol] = Piece.None;
board[endRow, endCol] = piece;
bool captureAvailable = false;
int[] directions = { -1, 1 }; // {down/right, up/left}
int yStartIndex = (BoardUtilities.IsKing(piece) || BoardUtilities.IsWhite(piece)) ? 0 : 1;
int yEndIndex = (BoardUtilities.IsKing(piece) || BoardUtilities.IsBlack(piece)) ? 1 : 0;
for (int idxY = yStartIndex; idxY <= yEndIndex; idxY++)
{
foreach (int t in directions)
{
bool result = GetCaptures(
moves, new List <Location>(locations),
board.Copy(), piece,
endRow, endCol, t, directions[idxY]
);
captureAvailable = captureAvailable || result;
}
}
if ((!captureAvailable) && (locations.Count > 1))
{
Move move = new Move();
foreach (Location location in locations)
{
move.AddMoves(location);
}
moves.Add(move);
}
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// CanJump - Может прыгать
/// Check the piece at the postion can jump any pieces on the board
/// Проверьте фигуру в позиции, можете прыгать любые фигуры на доске
/// </summary>
/// <param name="board">
/// the board state
/// состояние правления
/// </param>
/// <param name="row">
/// the row the piece is on
/// строка, на которой стоит произведение
/// </param>
/// <param name="col">
/// the column the piece is on
/// колонка, на которой находится произведение
/// </param>
/// <param name="verticalDirection">
/// the vertical direction to move in
/// вертикальное направление движения
/// </param>
/// <param name="horizontalDirection">
/// the horizontal direction to move in
/// горизонтальное направление движения
/// </param>
/// <returns><code>true</code>
/// if the piece can make a jump
/// если кусок может совершить прыжок
/// </returns>
private static bool CanJump(IBoard board, int row, int col, int verticalDirection, int horizontalDirection)
{
int newRow = row + verticalDirection;
int newCol = col + horizontalDirection;
Piece piece = board[row, col];
if (!InBounds(newRow, newCol, board))
{//not within board bounds
return(false);
}
if (BoardUtilities.AreOpponents(piece, board[newRow, newCol]))
{// check if you can jump enemy
int endRow = newRow + verticalDirection;
int endCol = newCol + horizontalDirection;
return(InBounds(endRow, endCol, board) && BoardUtilities.IsEmpty(board[endRow, endCol]));
}
return(false);
}