/// <summary>
/// Gets all possible moves of bishops of given player
/// </summary>
private static List <GameMove> GetMovesForBishops(ChessboardModel chessboard, PlayerColor playerColor)
{
var acumulator = new List <GameMove>();
var upLeft = new GameMoveVector(-1, 1);
var upRight = new GameMoveVector(1, 1);
var downLeft = new GameMoveVector(-1, -1);
var downRight = new GameMoveVector(1, -1);
for (int x = 0; x < 8; x++)
{
for (int y = 0; y < 8; y++)
{
var position = new ChessPosition(x, y);
var figure = chessboard.GetFigureOnPosition(position);
if (
figure != null &&
figure.Type == FigureType.Bishop &&
figure.Color == playerColor
)
{
acumulator.AddRange(CanMoveOrAttackIterative(chessboard, playerColor, position, upLeft));
acumulator.AddRange(CanMoveOrAttackIterative(chessboard, playerColor, position, upRight));
acumulator.AddRange(CanMoveOrAttackIterative(chessboard, playerColor, position, downLeft));
acumulator.AddRange(CanMoveOrAttackIterative(chessboard, playerColor, position, downRight));
}
}
}
acumulator.RemoveAll(x => x == null);
return(acumulator);
}
/// <summary>
/// Gets all possible moves of king of given player
/// </summary>
private static List <GameMove> GetMovesForKing(ChessboardModel chessboard, PlayerColor playerColor)
{
var acumulator = new List <GameMove>();
var up = new GameMoveVector(0, 1);
var left = new GameMoveVector(-1, 0);
var down = new GameMoveVector(0, -1);
var right = new GameMoveVector(1, 0);
var upLeft = new GameMoveVector(-1, 1);
var upRight = new GameMoveVector(1, 1);
var downLeft = new GameMoveVector(-1, -1);
var downRight = new GameMoveVector(1, -1);
for (int x = 0; x < 8; x++)
{
for (int y = 0; y < 8; y++)
{
var position = new ChessPosition(x, y);
var figure = chessboard.GetFigureOnPosition(position);
if (
figure != null &&
figure.Type == FigureType.King &&
figure.Color == playerColor
)
{
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(up)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(left)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(down)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(right)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(upLeft)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(upRight)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(downLeft)));
acumulator.Add(CanMoveOrAttack(chessboard, playerColor, position, position.Add(downRight)));
}
}
}
acumulator.RemoveAll(x => x == null);
return(acumulator);
}
/// <summary>
/// Get position after translating by given vector
/// </summary>
/// <param name="vector">Vector move translation</param>
/// <returns>Transalted position</returns>
public ChessPosition Add(GameMoveVector vector)
{
return(new ChessPosition(this.X + vector.X, this.Y + vector.Y));
}
/// <summary>
/// Gets moves in direction of vector, until figure of playing player is encountered, or positions ain't valid
/// </summary>
/// <param name="playerColor">Capturing player</param>
/// <param name="from">Position to move from</param>
/// <param name="vector">Vector to move to</param>
private static List <GameMove> CanMoveOrAttackIterative(ChessboardModel chessboard, PlayerColor playerColor, ChessPosition from, GameMoveVector vector)
{
var acumulator = new List <GameMove>();
var temp = from;
while (true)
{
temp = temp.Add(vector);
var attack = CanAttack(chessboard, playerColor, from, temp);
var move = CanMove(chessboard, playerColor, from, temp);
acumulator.Add(move);
acumulator.Add(attack);
if (attack != null)
{
return(acumulator);
}
if (move == null)
{
return(acumulator);
}
}
}
