public CellChangedEventArgs(Position i_CellPosition, CheckersGameBoard.eCellMode i_CellMode)
{
if (!Enum.IsDefined(typeof(CheckersGameBoard.eCellMode), i_CellMode))
{
throw new ArgumentOutOfRangeException("i_CellMode");
}
CellPosition = i_CellPosition;
NewCellMode = i_CellMode;
}
public bool IsPositionOutOfBounds(Position i_PositionToExamine )
{
return i_PositionToExamine.Row >= (int)r_BoardSize || i_PositionToExamine.Row < 0
|| i_PositionToExamine.Col >= (int)r_BoardSize || i_PositionToExamine.Col < 0;
}
public void TurnManToKingOnBoard(Position i_CurrPiecePosition)
{
eCellMode currentMode = r_BoardMatrix[i_CurrPiecePosition.Row, i_CurrPiecePosition.Col];
if (currentMode == eCellMode.Player1Piece)
{
r_BoardMatrix[i_CurrPiecePosition.Row, i_CurrPiecePosition.Col] = eCellMode.Player1King;
}
else
{ // currentMode == eCellMode.Player2Piece
r_BoardMatrix[i_CurrPiecePosition.Row, i_CurrPiecePosition.Col] = eCellMode.Player2King;
}
}
// Used to check if the player should become a king
public bool IsPieceOnEdgeOfBoard(Position i_CurrPiecePosition)
{
return i_CurrPiecePosition.Row == (int)r_BoardSize - 1 || i_CurrPiecePosition.Row == 0;
}
public void ErasePieceFromBoard(Position i_CellToErasePosition)
{
r_BoardMatrix[i_CellToErasePosition.Row, i_CellToErasePosition.Col] = eCellMode.Empty;
}
public void MovePieceOnBoard(Position i_Source, Position i_Destination)
{
r_BoardMatrix[i_Destination.Row, i_Destination.Col] = r_BoardMatrix[i_Source.Row, i_Source.Col];
r_BoardMatrix[i_Source.Row, i_Source.Col] = eCellMode.Empty;
}
// Finds the piece in the list using given position coordinates
private Piece getPieceByPosition(PlayerInfo i_Player, Position i_Position)
{
List<Piece> playerPieceList = getPlayerPiecesList(i_Player);
Piece wantedPiece = null;
foreach (Piece currentPiece in playerPieceList)
{
if (currentPiece.CurrPosition.Equals(i_Position))
{
wantedPiece = currentPiece;
break;
}
}
return wantedPiece;
}
// Removes the piece from the current game
private void removePieceFromPosition(PlayerInfo i_CurrPlayerTurn, Position i_PiecePosition)
{
List<Piece> playerPieceList = getPlayerPiecesList(i_CurrPlayerTurn);
Piece pieceToRemove = getPieceByPosition(i_CurrPlayerTurn, i_PiecePosition);
pieceToRemove.RemovePiece(m_CheckersBoard);
playerPieceList.Remove(pieceToRemove);
}
// check if for detenation position represent a capture move, if so- the output parameter update the captured piece Position
private bool captureMove(Piece i_SrcPiece, Position i_LegalDstPosition, out Position i_CapturePosition)
{
i_CapturePosition = new Position( // Position will be relevant only if i_Capture_Position is true
(i_SrcPiece.CurrPosition.Row + i_LegalDstPosition.Row) / 2,
(i_SrcPiece.CurrPosition.Col + i_LegalDstPosition.Col) / 2);
return Math.Abs(i_SrcPiece.CurrPosition.Row - i_LegalDstPosition.Row) == 2;
}
public void MovePiece(Position i_DstPosition, CheckersGameBoard i_CheckersBoard)
{
i_CheckersBoard.MovePieceOnBoard(m_CurrPosition, i_DstPosition);
CurrPosition = i_DstPosition;
if (i_CheckersBoard.IsPieceOnEdgeOfBoard(m_CurrPosition) && !m_King)
{
turnManToKing(i_CheckersBoard);
}
}
public Position? GetPossibleCapturePositionIfExists(Position i_NextPosition)
{
Position? returnedValue = null;
if (Math.Abs(m_CurrPosition.Row - i_NextPosition.Row) == 2)
{
returnedValue = new Position(
(m_CurrPosition.Row + i_NextPosition.Row) / 2,
(m_CurrPosition.Col + i_NextPosition.Col) / 2);
}
return returnedValue;
}
// Piece checks if a suggested move is valid
private bool isMoveValid(Position i_PositionToExamine, CheckersGameBoard i_CheckersGameBoard, out bool o_IsMoveCapture)
{
o_IsMoveCapture = false;
bool moveValid = !i_CheckersGameBoard.IsPositionOutOfBounds(i_PositionToExamine);
if (moveValid)
{
moveValid &= i_CheckersGameBoard[i_PositionToExamine.Row, i_PositionToExamine.Col] == CheckersGameBoard.eCellMode.Empty;
Position? possibleCapturePosition = GetPossibleCapturePositionIfExists(i_PositionToExamine);
// If the new position is 2 cells far from the current one
if(possibleCapturePosition != null)
{
int middleRow = possibleCapturePosition.Value.Row;
int middleCol = possibleCapturePosition.Value.Col;
if (r_Owner == ePlayerTag.First)
{
moveValid &= i_CheckersGameBoard[middleRow, middleCol]
== CheckersGameBoard.eCellMode.Player2Piece
|| i_CheckersGameBoard[middleRow, middleCol]
== CheckersGameBoard.eCellMode.Player2King;
}
else
{
// if(r_Owner == ePlayerTag.Second)
moveValid &= i_CheckersGameBoard[middleRow, middleCol]
== CheckersGameBoard.eCellMode.Player1Piece
|| i_CheckersGameBoard[middleRow, middleCol]
== CheckersGameBoard.eCellMode.Player1King;
}
// If the move is valid and distance is 2 cells - it's a capture move
o_IsMoveCapture = moveValid;
}
}
return moveValid;
}