//If a piece was saved in the saved data in controller, add the piece at its coordinate in the grid
public void AddSavedPiece(PieceClass savedPiece)
{
PieceClass newSavedPiece = new PieceClass() { hasMoved = savedPiece.hasMoved, pieceType = savedPiece.pieceType,
position = savedPiece.position, team = savedPiece.team };
savedPiece = null;
grid[newSavedPiece.position.row, newSavedPiece.position.col] = newSavedPiece;
if (newSavedPiece.team == Team.White)
{
whiteActive.Add(newSavedPiece);
}
else
{
blackActive.Add(newSavedPiece);
}
newSavedPiece = null;
}
//Function used to simulate a move for the WillKingBeInCheck function
private void SimulateMove(Coordinate source, Coordinate destination, Team player, ref PieceClass[,] copyOfGrid, List<PieceClass> whiteActiveCopy, List<PieceClass> blackActiveCopy)
{
if (copyOfGrid[destination.row, destination.col].team != Team.Blank)
{
//Remove attacked piece from respective active list
if (player == Team.White)
{
blackActiveCopy.Remove(blackActiveCopy.Find(x => (x.position.col == destination.col && x.position.row == destination.row)));
}
else
{
whiteActiveCopy.Remove(whiteActiveCopy.Find(x => (x.position.col == destination.col && x.position.row == destination.row)));
}
}
copyOfGrid[destination.row, destination.col] = copyOfGrid[source.row, source.col];
copyOfGrid[destination.row, destination.col].position = new Coordinate { row = destination.row, col = destination.col, team = player };
copyOfGrid[destination.row, destination.col].position = destination;
copyOfGrid[source.row, source.col] = new PieceClass { pieceType = Piece.Blank, team = Team.Blank, position = source };
}
private void InitializeGrid()
{
if (grid != null)
{
Array.Clear(grid, 0, grid.Length);
}
else
{
grid = new PieceClass[NUM_CELLS, NUM_CELLS];
}
grid[0, 0] = new PieceClass { pieceType = Piece.Rook, team = Team.Black, position = new Coordinate { row = 0, col = 0, team = Team.Black } };
grid[0, 1] = new PieceClass { pieceType = Piece.Knight, team = Team.Black, position = new Coordinate { row = 0, col = 1, team = Team.Black } };
grid[0, 2] = new PieceClass { pieceType = Piece.Bishop, team = Team.Black, position = new Coordinate { row = 0, col = 2, team = Team.Black } };
grid[0, 3] = new PieceClass { pieceType = Piece.Queen, team = Team.Black, position = new Coordinate { row = 0, col = 3, team = Team.Black } };
grid[0, 4] = new PieceClass { pieceType = Piece.King, team = Team.Black, position = new Coordinate { row = 0, col = 4, team = Team.Black } };
grid[0, 5] = new PieceClass { pieceType = Piece.Bishop, team = Team.Black, position = new Coordinate { row = 0, col = 5, team = Team.Black } };
grid[0, 6] = new PieceClass { pieceType = Piece.Knight, team = Team.Black, position = new Coordinate { row = 0, col = 6, team = Team.Black } };
grid[0, 7] = new PieceClass { pieceType = Piece.Rook, team = Team.Black, position = new Coordinate { row = 0, col = 7, team = Team.Black } };
grid[7, 0] = new PieceClass { pieceType = Piece.Rook, team = Team.White, position = new Coordinate { row = 7, col = 0, team = Team.White } };
grid[7, 1] = new PieceClass { pieceType = Piece.Knight, team = Team.White, position = new Coordinate { row = 7, col = 1, team = Team.White } };
grid[7, 2] = new PieceClass { pieceType = Piece.Bishop, team = Team.White, position = new Coordinate { row = 7, col = 2, team = Team.White } };
grid[7, 3] = new PieceClass { pieceType = Piece.Queen, team = Team.White, position = new Coordinate { row = 7, col = 3, team = Team.White } };
grid[7, 4] = new PieceClass { pieceType = Piece.King, team = Team.White, position = new Coordinate { row = 7, col = 4, team = Team.White } };
grid[7, 5] = new PieceClass { pieceType = Piece.Bishop, team = Team.White, position = new Coordinate { row = 7, col = 5, team = Team.White } };
grid[7, 6] = new PieceClass { pieceType = Piece.Knight, team = Team.White, position = new Coordinate { row = 7, col = 6, team = Team.White } };
grid[7, 7] = new PieceClass { pieceType = Piece.Rook, team = Team.White, position = new Coordinate { row = 7, col = 7, team = Team.White } };
for (int i = 0; i < 8; i++)
{
grid[1, i] = new PieceClass { pieceType = Piece.Pawn, team = Team.Black, position = new Coordinate { row = 1, col = i, team = Team.Black }, hasMoved = false };
grid[6, i] = new PieceClass { pieceType = Piece.Pawn, team = Team.White, position = new Coordinate { row = 6, col = i, team = Team.White }, hasMoved = false };
}
for (int R = 2; R < 6; R++)
{
for (int C = 0; C < 8; C++)
{
grid[R, C] = new PieceClass { pieceType = Piece.Blank, team = Team.Blank, position = new Coordinate { row = R, col = C, team = Team.Blank } };
}
}
for (int i = 0; i < 8; i++)
{
whiteActive.Add(grid[6, i]);
whiteActive.Add(grid[7, i]);
blackActive.Add(grid[0, i]);
blackActive.Add(grid[1, i]);
}
}
//Get pawn's simulated moves from the copy of the grid
private List<Coordinate> GetPawnMoves(Coordinate baseCoord, PieceClass[,] copyOfGrid)
{
List<Coordinate> possibleMoves = new List<Coordinate>();
possibleMoves.Add(new Coordinate { row = baseCoord.row + 1, col = baseCoord.col });
if (!copyOfGrid[baseCoord.row, baseCoord.col].hasMoved)
{
possibleMoves.Add(new Coordinate { row = baseCoord.row + 2, col = baseCoord.col });
}
if (copyOfGrid[baseCoord.row + 1, baseCoord.col - 1].team != copyOfGrid[baseCoord.row, baseCoord.col].team &&
copyOfGrid[baseCoord.row + 1, baseCoord.col - 1].team != Team.Blank)
{
possibleMoves.Add(new Coordinate { row = baseCoord.row + 1, col = baseCoord.col - 1 });
}
if (copyOfGrid[baseCoord.row + 1, baseCoord.col + 1].team != copyOfGrid[baseCoord.row, baseCoord.col].team &&
copyOfGrid[baseCoord.row + 1, baseCoord.col + 1].team != Team.Blank)
{
possibleMoves.Add(new Coordinate { row = baseCoord.row + 1, col = baseCoord.col + 1 });
}
return possibleMoves;
}
//Check for check with a copy of the grid
private void CheckForCheck(Team player, ref PieceClass[,] copyOfGrid, List<PieceClass> whiteActiveCopy, List<PieceClass> blackActiveCopy)
{
List<Coordinate> masterList = new List<Coordinate>();
//get teams possible moves
if (player == Team.White)
{
foreach (PieceClass piece in whiteActiveCopy)
{
masterList.AddRange(PossibleMoves(piece.position, player, ref copyOfGrid));
}
//lamba expression to determine if the black king's coordinate is in the master list of possible move coordinates
if (masterList.Exists(x => x == blackActiveCopy.Find(z => z.pieceType == Piece.King).position))
{
isBlackInCheck = true;
}
else
{
isBlackInCheck = false;
}
}
else
{
foreach (PieceClass piece in blackActiveCopy)
{
masterList.AddRange(PossibleMoves(piece.position, player, ref copyOfGrid));
}
//lamba expression to determine if the whiate king's coordinate is in the master list of possible move coordinates
if (masterList.Exists(x => x == whiteActiveCopy.Find(z => z.pieceType == Piece.King).position))
{
isWhiteInCheck = true;
}
else
{
isWhiteInCheck = false;
}
}
}
public void UpdateActiveListFromSaveState(PieceClass piece)
{
if (piece.team == Team.White)
{
whiteActive.Add(piece);
}
else
{
blackActive.Add(piece);
}
piece = null;
}
public void SetEmptyGridCellsBlank()
{
for (int rowCount = 0; rowCount < 8; rowCount++)
{
for (int colCount = 0; colCount < 8; colCount++)
{
if (grid[rowCount,colCount] == null)
{
grid[rowCount, colCount] = new PieceClass { pieceType = Piece.Blank, team = Team.Blank, position = new Coordinate { row = rowCount, col = colCount, team = Team.Blank } };
}
}
}
}
//Simulation of possible moves
public List<Coordinate> PossibleMoves(Coordinate coord, Team player, ref PieceClass[,] copyOfGrid)
{
List<Coordinate> possibleMoves = new List<Coordinate>();
//Call appropriate piece function
switch (copyOfGrid[coord.row, coord.col].pieceType)
{
case Piece.King: possibleMoves = GetKingMoves(coord);
break;
case Piece.Queen: possibleMoves = GetQueenMoves(coord);
break;
case Piece.Bishop: possibleMoves = GetBishopMoves(coord);
break;
case Piece.Knight: possibleMoves = GetKnightMoves(coord);
break;
case Piece.Rook: possibleMoves = GetRookMoves(coord);
break;
case Piece.Pawn: possibleMoves = GetPawnMoves(coord);
break;
}
foreach (Coordinate c in possibleMoves.ToList())
{
if (c.row < 0 || c.row > 7 || c.col < 0 || c.col > 7)
{
possibleMoves.Remove(c);
}
else if (copyOfGrid[c.row, c.col].team == player)
{
possibleMoves.Remove(c);
}
}
return possibleMoves;
}
//remove the king's moves that would put it in check
private List<Coordinate> ValidateKingMoves(List<Coordinate> coordList, Team player, ref PieceClass[,] copyOfGrid)
{
List<Coordinate> masterList = new List<Coordinate>();
if (player == Team.White)
{
foreach (PieceClass piece in whiteActive)
{
masterList.AddRange(PossibleMoves(piece.position, player, ref copyOfGrid));
}
}
else
{
foreach (PieceClass piece in blackActive)
{
masterList.AddRange(PossibleMoves(piece.position, player, ref copyOfGrid));
}
}
foreach (Coordinate c in coordList)
{
if (masterList.Exists(x => x == c))
{
coordList.Remove(coordList.Find(x => (x.col == c.col && x.row == c.row)));
}
}
return coordList;
}