/// <summary>
/// Deep copy constructor
/// </summary>
/// <param name="src"></param>
public GameState(GameState src)
{
Board = new TakBoard(src.Board);
White = new PlayerState(src.White);
Black = new PlayerState(src.Black);
TurnNumber = src.TurnNumber;
}
public GameState(TakBoard board)
{
Board = board;
White = new PlayerState(TakPiece.PieceColor.White, Board.Size);
Black = new PlayerState(TakPiece.PieceColor.Black, Board.Size);
TurnNumber = 0;
}
private bool IsLegalPlace(GameState game, out string reason)
{
TakBoard boardState = game.Board;
if (game.TurnNumber == 0 && (Piece == TakPiece.PieceType.Capstone || Piece == TakPiece.PieceType.Wall))
{
reason = "Opening move must be a flat";
return(false);
}
else if (Piece == TakPiece.PieceType.Capstone && game[PieceColor].NumCapstones <= 0)
{
reason = "Out of capstones";
return(false);
}
else if (Piece != TakPiece.PieceType.Capstone && game[PieceColor].NumPieces <= 0)
{
reason = "Out of stones";
return(false);
}
else if (boardState[Row, Column].Size == 0)
{
reason = "";
return(true);
}
else
{
reason = "Cannot place a piece on a stack";
return(false);
}
}
/// <summary>
/// Is this a legal move for the state of the game?
/// </summary>
/// <param name="boardState"></param>
/// <returns></returns>
public bool IsLegal(GameState game, out string reason)
{
TakBoard boardState = game.Board;
if (Row < 0 || Row >= boardState.Size || Column < 0 || Column >= boardState.Size)
{
reason = "Invalid coordinate";
return(false);
}
if (Type == MoveType.Place)
{
return(IsLegalPlace(game, out reason));
}
else
{
return(IsLegalMove(game, out reason));
}
}
public BoardGraph(TakBoard board, TakPiece.PieceColor player)
{
Vertices = new List <Vertex>();
VerticesByCoordinate = new Dictionary <Point, Vertex>();
for (int i = 0; i < board.Size; i++)
{
for (int j = 0; j < board.Size; j++)
{
if (board[i, j].Owner == player && !board[i, j].Top.IsWall)
{
Vertex v = new Vertex()
{
Row = i, Column = j
};
VerticesByCoordinate.Add(new Point(i, j), v);
Vertices.Add(v);
}
}
}
for (int i = 0; i < Vertices.Count; i++)
{
Vertex p = Vertices[i];
for (int j = i; j < Vertices.Count; j++)
{
Vertex q = Vertices[j];
if ((Math.Abs(q.Row - p.Row) == 1 && q.Column == p.Column) ||
(Math.Abs(q.Column - p.Column) == 1 && q.Row == p.Row))
{
q.Adjacencies.Add(p);
p.Adjacencies.Add(q);
}
}
}
}
private bool IsLegalMove(GameState game, out string reason)
{
TakBoard boardState = game.Board;
// if we're moving more pices than are in the stack
if (boardState[Row, Column].Size < NumMoved || boardState[Row, Column].Size == 0)
{
reason = "Not enough pieces in stack";
return(false);
}
// we actually own the stack being moved
if (boardState[Row, Column].Top.Color != PieceColor)
{
reason = "Stack belongs to another player";
return(false);
}
// if we're moving more pieces than the carry limit
if (boardState.Size < NumMoved)
{
reason = "Carry limit exceeded";
return(false);
}
// if we're moving so far that we'd fall off the edge of the board
if ((Direction == MoveDirection.Up && Row + Drops.Count >= boardState.Size) ||
(Direction == MoveDirection.Down && Row - Drops.Count < 0) ||
(Direction == MoveDirection.Right && Column + Drops.Count >= boardState.Size) ||
(Direction == MoveDirection.Left && Column - Drops.Count < 0))
{
reason = "Not enough room to move in that direction";
return(false);
}
// if we're placing non-capstones on walls, or any piece on a capstone
int dR, dC;
if (Direction == MoveDirection.Left)
{
dR = 0;
dC = -1;
}
else if (Direction == MoveDirection.Right)
{
dR = 0;
dC = 1;
}
else if (Direction == MoveDirection.Up)
{
dR = 1;
dC = 0;
}
else
{
dR = -1;
dC = 0;
}
PieceStack src = boardState[Row, Column].NonDestructiveGrab(NumMoved);
for (int i = 0; i < Drops.Count; i++)
{
int row = Row + dR * (i + 1);
int col = Column + dC * (i + 1);
PieceStack dst = boardState[row, col];
if (!src.CanDrop(dst, Drops[i]))
{
reason = string.Format("Cannot drop piece on {0}{1}", (char)(col + 'a'), row + 1);
return(false);
}
src.Drop(Drops[i]);
}
// if we reach here then the move is legal
reason = "";
return(true);
}
