/// <summary>
/// Do a move, return the taken piece
/// </summary>
/// <param name="move"></param>
/// <returns></returns>
public Piece?DoMove(Move move, Func <Position, Piece.PieceType> promote)
{
var taken = this[move.To];
var mover = this[move.From].Value;
mover.HasEverMoved = true;
var promotionRank = mover.Owner == Piece.Colour.White ? 7 : 0;
if (mover.Type == Piece.PieceType.Pawn && move.To.Rank == promotionRank)
{
mover.Type = promote(move.To);
}
this[move.To] = mover;
this[move.From] = null;
if (Detect2KingsStalemate())
{
Stalemate?.Invoke();
}
return(taken);
}
public IEnumerable <Move> GetMoves(Piece.Colour player)
{
var moves = GetPositions(player)
.Select(position => GetMoves(position))
.SelectMany(x => x);
if (!moves.Any())
{
var kingpos = KingPosition(player);
if (UnderAttack(kingpos, player.Opposite()))
{
Checkmate?.Invoke(player.Opposite());
}
else
{
Stalemate?.Invoke();
}
}
return(moves);
}
public async override void _Ready()
{
bool gameRunning = true;
Board = new Board();
Board.Checkmate += winner =>
{
gameRunning = false;
GD.Print($"Checkmate! {winner} wins.");
Checkmate?.Invoke(winner);
};
Board.Stalemate += () =>
{
gameRunning = false;
GD.Print("Stalemate!");
Stalemate?.Invoke();
};
UI = GetNode <UI>("UI");
var squares = GetNode <Control>("Squares");
var colour = Piece.Colour.Black;
for (int i = 0; i < Board.Size; i++)
{
for (int j = 0; j < Board.Size; j++)
{
var square = new SquareNode(this, colour, new Position(j, i));
square.Clicked += position =>
{
SquareClicked?.Invoke(position);
};
Squares[j, i] = square;
squares.AddChild(square);
colour = colour.Opposite();
}
colour = colour.Opposite();
}
// WhitePlayer = new HumanPlayer(this, Piece.Colour.White);
//BlackPlayer = new HumanPlayer(this, Piece.Colour.Black);
//WhitePlayer = new RandomPlayer(this, Piece.Colour.White);
//BlackPlayer = new RandomPlayer(this, Piece.Colour.Black);
//WhitePlayer = new AIPlayer(this, Piece.Colour.White);
// BlackPlayer = new AIPlayer(this, Piece.Colour.Black);
var drawer = new PieceDrawer(this);
squares.AddChild(drawer);
CurrentPlayer = Piece.Colour.White;
while (true)
{
LegalMoves = Board.GetMoves(CurrentPlayer).ToHashSet();
if (!gameRunning)
{
break;
}
var move = await Current.GetMoveAsync();
await Task.Delay(10);
GD.Print($"{CurrentPlayer} wants to move {move}");
await Task.Run(() => Board.DoMove(move, p => Current.Promote(p).Result));
drawer.Update();
CurrentPlayer = CurrentPlayer.Opposite();
}
}