public GameBoardState Clone()
{
GameBoardState newGbs = new GameBoardState(this.levels, this.rows, this.cols);
IGameBoardState igbs = this;
for (int lvl = 0; lvl < (igbs.GetNumLevels()); lvl++)
{
for (int row = 0; row < (igbs.GetNumRows()); row++)
{
for (int col = 0; col < (igbs.GetNumCols()); col++)
{
ISpaceState iss = igbs.GetSpaceState(lvl, row, col);
newGbs.spaces[lvl][row][col].occupied = iss.IsOccupied();
IPieceState ips = iss.Occupier();
if (ips != null)
{
PieceState ps = ips.CreatePieceState();
newGbs.spaces[lvl][row][col].occupier = ps;
newGbs.AlivePieces.Add(ps);
ps.space = newGbs.spaces[lvl][row][col];
}
}
}
}
foreach (IPieceState piece in DeadPieces)
{
newGbs.DeadPieces.Add(piece.CreatePieceState());
}
return(newGbs);
}
public Piece GetPiece(IPieceState pieceState)
{
ISpaceState iss_source = pieceState.GetSpaceState();
Space space = this.GetSpace(iss_source.GetLevel(), iss_source.GetRow(), iss_source.GetCol());
return(space.occupier);
}
private static List <Move> GetPawnMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves = new List <Move>();
int moveDirection = GetPawnMoveDirection(piece);
int pawnStartRow = GetPawnStartRow(gameBoard, piece);
int possibleDistance;
//check one space ahead, two spaces ahead if on starting row
if (piece.GetSpaceState().GetRow() == pawnStartRow)
{
possibleDistance = 2;
}
else
{
possibleDistance = 1;
}
int[] vOffsets = { -1, 0, 1 };
foreach (int vOffset in vOffsets)
{
for (int i = 1; i <= possibleDistance; i++)
{
ISpaceState cSpace = gameBoard.GetSpaceState(piece.GetSpaceState().GetLevel() + vOffset, piece.GetSpaceState().GetRow() + moveDirection * i, piece.GetSpaceState().GetCol());
if (cSpace != null && cSpace.IsOccupied())
{
break;
}
else if (cSpace != null)
{
moves.Add(new Move(piece, cSpace, Move.MoveType.nocap));
}
}
}
//check diagonals for possible capture
int[] cOffsets = { -1, 1 };
foreach (int vOffset in vOffsets)
{
foreach (int cOffset in cOffsets)
{
ISpaceState cSpace = gameBoard.GetSpaceState(piece.GetSpaceState().GetLevel(), piece.GetSpaceState().GetRow() + moveDirection, piece.GetSpaceState().GetCol() + cOffset);
if (cSpace != null && cSpace.IsOccupied() && cSpace.Occupier().GetPlayer() != piece.GetPlayer())
{
moves.Add(new Move(piece, cSpace, Move.MoveType.cap));
}
}
}
//TODO: check for en passant
return(moves);
}
private static List <Move> GetBishopMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves = new List <Move>();
//bishop can move diagonally foward-left, foward-right, back-left, back-right, forward-left-up, forward-left-down, forward-right-up, forward-right-down, back-left-up, back-left-down, back-right-up, back-right-down
int[,] triplets = { { 0, 1, 1 }, { 0, 1, -1 }, { 0, -1, 1 }, { 0, -1, -1 }, { 1, 1, 1 }, { -1, 1, 1 }, { 1, 1, -1 }, { -1, 1, -1 }, { 1, -1, 1 }, { -1, -1, 1 }, { 1, -1, -1 }, { -1, -1, -1 } };
for (int i = 0; i < triplets.GetLength(0); i++)
{
moves.AddRange(GetMovesInDirection(gameBoard, piece, triplets[i, 0], triplets[i, 1], triplets[i, 2]).ToArray());
}
return(moves);
}
private static List <Move> GetRookMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves = new List <Move>();
//rook can move straight forward, back, left, right, up, or down
int[,] triplets = { { 0, 1, 0 }, { 0, -1, 0 }, { 0, 0, 1 }, { 0, 0, -1 }, { 1, 0, 0 }, { -1, 0, 0 } };
for (int i = 0; i < triplets.GetLength(0); i++)
{
moves.AddRange(GetMovesInDirection(gameBoard, piece, triplets[i, 0], triplets[i, 1], triplets[i, 2]).ToArray());
}
return(moves);
}
private static int GetPawnStartRow(IGameBoardState gameBoard, IPieceState piece)
{
int pawnStartRow;
if (piece.GetPlayer() == Player.PlayerNumber.Player1)
{
pawnStartRow = 1;
}
else
{
pawnStartRow = gameBoard.GetNumRows() - 2;
}
return(pawnStartRow);
}
public SpaceState CreateSpaceState()
{
SpaceState ss = new SpaceState();
ss.occupied = ((ISpaceState)this).IsOccupied();
IPieceState ps = ((ISpaceState)this).Occupier();
if (ps != null)
{
ss.occupier = ps.CreatePieceState();
}
return(ss);
}
SpaceState ISpaceState.CreateSpaceState()
{
SpaceState ss = new SpaceState();
IPieceState ps = ((ISpaceState)this).Occupier();
if (ps != null)
{
ss.occupier = ps.CreatePieceState();
}
ss.occupied = ((ISpaceState)this).IsOccupied();
ss.level = this.level;
ss.row = this.row;
ss.col = this.col;
return(ss);
}
private static List <Move> GetKnightMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves = new List <Move>();
//knight moves 2 forward 1 left, 2 forward 1 right, 2 right 1 foward, 2 right 1 back, 2 left 1 forward, 2 left 1 back, 2 back 1 left, 2 back 1 right
//these moves can happen on the same level, 2 levels up, or 2 levels down only.
int[,] doublets = { { 2, 1 }, { 2, -1 }, { 1, 2 }, { 1, -2 }, { -1, 2 }, { -1, -2 }, { -2, 1 }, { -2, -1 } };
int[] levelDirections = { -2, 0, 2 };
foreach (int levelDirection in levelDirections)
{
for (int i = 0; i < doublets.GetLength(0); i++)
{
moves.AddRange(GetMovesInDirection(gameBoard, piece, levelDirection, doublets[i, 0], doublets[i, 1], 1).ToArray());
}
}
return(moves);
}
private static int GetPawnMoveDirection(IPieceState piece)
{
int moveDirection;
if (piece.GetPlayer() == Player.PlayerNumber.Player1)
{
moveDirection = 1;
}
else if (piece.GetPlayer() == Player.PlayerNumber.Player2)
{
moveDirection = -1;
}
else
{
throw new Exception("Player not set on piece.");
}
return(moveDirection);
}
public void Move(Move move)
{
//Move objects can be passed between games so we
//have to look up the piece and space owned by this game
//and check to ensure the move is applicable to this game
IPieceState ips = move.piece;
ISpaceState iss_dest = move.space;
ISpaceState iss_source = ips.GetSpaceState();
ISpaceState this_iss_dest = this.GetSpaceState(iss_dest.GetLevel(), iss_dest.GetRow(), iss_dest.GetCol());
ISpaceState this_iss_source = this.GetSpaceState(iss_source.GetLevel(), iss_source.GetRow(), iss_source.GetCol());
if (!this_iss_source.IsOccupied() || this_iss_source.Occupier().GetPieceType() != ips.GetPieceType() || this_iss_source.Occupier().GetPlayer() != ips.GetPlayer())
{
throw new Exception("Invalid move for this simulated game board state.");
}
Move((PieceState)this_iss_source.Occupier(), (SpaceState)this_iss_dest);
}
private static List <Move> GetMovesInDirection(IGameBoardState gameBoard, IPieceState piece, int levelDirection, int rowDirection, int colDirection, int max = 99)
{
List <Move> moves = new List <Move>();
int levelChange = levelDirection;
int rowChange = rowDirection;
int colChange = colDirection;
for (int i = 0; i < max; i++)
{
ISpaceState cSpace = gameBoard.GetSpaceState(piece.GetSpaceState().GetLevel() + levelChange, piece.GetSpaceState().GetRow() + rowChange, piece.GetSpaceState().GetCol() + colChange);
if (cSpace == null)
{
break;
}
if (cSpace.IsOccupied() && cSpace.Occupier().GetPlayer() != piece.GetPlayer())
{
//last move in the sequence is a cap move
moves.Add(new Move(piece, cSpace, Move.MoveType.cap));
break;
}
if (cSpace.IsOccupied() && cSpace.Occupier().GetPlayer() == piece.GetPlayer())
{
break;
}
if (!cSpace.IsOccupied())
{
moves.Add(new Move(piece, cSpace, Move.MoveType.nocap));
//amplify move for next iteration
levelChange += levelDirection;
rowChange += rowDirection;
colChange += colDirection;
}
}
return(moves);
}
private static List <Move> GetQueenMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves = new List <Move>();
//queen can move one space in any direction, so generate cartesian product of all possible directions
int[] rowDirections = { -1, 0, 1 };
int[] colDirections = { -1, 0, 1 };
int[] lvlDirections = { -1, 0, 1 };
foreach (int rowDirection in rowDirections)
{
foreach (int colDirection in colDirections)
{
foreach (int lvlDirection in lvlDirections)
{
moves.AddRange(GetMovesInDirection(gameBoard, piece, lvlDirection, rowDirection, colDirection).ToArray());
}
}
}
return(moves);
}
public bool Move(Move move)
{
//Move objects can be passed between games so we
//have to look up the piece and space owned by this game
//and check to ensure the move is applicable to this game
IPieceState ips = move.piece;
ISpaceState iss_dest = move.space;
ISpaceState iss_source = ips.GetSpaceState();
ISpaceState this_iss_dest = this.GetSpace(iss_dest.GetLevel(), iss_dest.GetRow(), iss_dest.GetCol());
ISpaceState this_iss_source = this.GetSpace(iss_source.GetLevel(), iss_source.GetRow(), iss_source.GetCol());
if (!this_iss_source.IsOccupied() || this_iss_source.Occupier().GetPieceType() != ips.GetPieceType() || this_iss_source.Occupier().GetPlayer() != ips.GetPlayer())
{
Debug.Log("Illegal move attempted. Skipping turn." + move.ToString());
if (!this_iss_source.IsOccupied())
{
Debug.Log("Source is not occupied in real game board.");
}
else if (this_iss_source.Occupier().GetPieceType() != ips.GetPieceType())
{
Debug.Log("A different piece type is at the source location in real game board.");
}
else if (this_iss_source.Occupier().GetPlayer() != ips.GetPlayer())
{
Debug.Log("A different player owns the piece in the real game board.");
}
return(false);
//throw new Exception("Invalid move for this real game board.");
}
Move((Piece)this_iss_source.Occupier(), (Space)this_iss_dest);
return(true);
}
public static List <Move> GetMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves;
switch (piece.GetPieceType())
{
case Piece.PieceType.pawn:
moves = GetPawnMoves(gameBoard, piece);
break;
case Piece.PieceType.bishop:
moves = GetBishopMoves(gameBoard, piece);
break;
case Piece.PieceType.king:
moves = GetKingMoves(gameBoard, piece);
break;
case Piece.PieceType.knight:
moves = GetKnightMoves(gameBoard, piece);
break;
case Piece.PieceType.queen:
moves = GetQueenMoves(gameBoard, piece);
break;
case Piece.PieceType.rook:
moves = GetRookMoves(gameBoard, piece);
break;
default:
moves = new List <Move>();
break;
}
return(moves);
}
public static List <Move> GetCaptureMoves(IGameBoardState gameBoard, IPieceState piece)
{
List <Move> moves;
switch (piece.GetPieceType())
{
case Piece.PieceType.pawn:
moves = GetPawnMoves(gameBoard, piece);
break;
case Piece.PieceType.bishop:
moves = GetBishopMoves(gameBoard, piece);
break;
case Piece.PieceType.king:
moves = GetKingMoves(gameBoard, piece);
break;
case Piece.PieceType.knight:
moves = GetKnightMoves(gameBoard, piece);
break;
case Piece.PieceType.queen:
moves = GetQueenMoves(gameBoard, piece);
break;
case Piece.PieceType.rook:
moves = GetRookMoves(gameBoard, piece);
break;
default:
moves = new List <Move>();
break;
}
return(moves.Where(s => s.moveType == Move.MoveType.cap).Select(s => s).ToList());
}
void IGameBoardState.Move(IPieceState piece, ISpaceState space)
{
Move m = new Move(piece, space, global::Move.MoveType.none);
this.Move(m);
}
public Move(IPieceState piece, ISpaceState space, MoveType moveType)
{
this.piece = piece;
this.space = space;
this.moveType = moveType;
}
