public GameLogic(Board i_GameBoard, Player.eColor i_PlayerTurn)
{
Board copiedBoard = i_GameBoard;
m_GameBoard = copiedBoard;
m_PlayerTurn = i_PlayerTurn;
}
public bool ManageTurnChanging()
{
// this method is managing the players turn changing and return true if the turn has been changed.
bool isTurnChanged = true;
if (m_PlayerTurn == Player.eColor.Red && m_YellowPlayerOptions.Count > 0)
{
m_PlayerTurn = Player.eColor.Yellow;
}
else if (m_PlayerTurn == Player.eColor.Yellow && m_RedPlayerOptions.Count > 0)
{
m_PlayerTurn = Player.eColor.Red;
}
else if (IsGameOver())
{
m_PlayerTurn = m_PlayerTurn == Player.eColor.Red ? Player.eColor.Yellow : Player.eColor.Red;
}
else if ((m_PlayerTurn == Player.eColor.Red && m_YellowPlayerOptions.Count == 0) ||
(m_PlayerTurn == Player.eColor.Yellow && m_RedPlayerOptions.Count == 0))
{
isTurnChanged = false;
}
return(isTurnChanged);
}
public bool MoveIsLegal(int i_Row, int i_Column, Player.eColor i_PlayerColor, out Move o_Move)
{
o_Move = null;
bool v_MoveIsLegal = false;
Cell cellToCheck = new Cell(i_Row, i_Column);
Directions[] allDirections = AllDirections.GetAllDirections();
if (cellIsEmpty(cellToCheck))
{
o_Move = new Move(i_Row, i_Column);
foreach (Directions direction in allDirections)
{
Cell startCell = new Cell(i_Row, i_Column);
Cell endCell;
if (checkDirection(startCell, i_PlayerColor, direction, out endCell))
{
o_Move.AddValidDirection(direction, endCell);
}
}
v_MoveIsLegal = o_Move.HasValidMove();
}
return(v_MoveIsLegal);
}
public void updatePlayersOptions()
{
// this method is updating the Lists of the players options
List <Cell> cellList = new List <Cell>();
Player.eColor lastPlayerTurn;
bool isCellAnOption, shouldMethodAddCellsToUpdateList;
m_YellowPlayerOptions.Clear();
m_RedPlayerOptions.Clear();
lastPlayerTurn = m_PlayerTurn;
shouldMethodAddCellsToUpdateList = false;
foreach (Cell cellIteator in m_GameBoard.Matrix)
{
if (cellIteator.Sign == Cell.k_Empty)
{
m_PlayerTurn = Player.eColor.Yellow;
isCellAnOption = isPlayerMoveBlockingEnemy(cellIteator, ref cellList, shouldMethodAddCellsToUpdateList);
if (isCellAnOption)
{
m_YellowPlayerOptions.Add(cellIteator);
}
m_PlayerTurn = Player.eColor.Red;
isCellAnOption = isPlayerMoveBlockingEnemy(cellIteator, ref cellList, shouldMethodAddCellsToUpdateList);
if (isCellAnOption)
{
m_RedPlayerOptions.Add(cellIteator);
}
}
}
// restore the turn of the last player
m_PlayerTurn = lastPlayerTurn;
}
private bool checkDirection(Cell i_StartCell, Player.eColor i_CurrentPlayerColor,
Directions i_Direction, out Cell o_EndCell)
{
Player.eColor oponentColor = GetOponentColor(i_CurrentPlayerColor);
i_StartCell.MoveToDirection(i_Direction);
bool cellContainsCurrentPlayerColor = false;
bool cellContainsOponentColor = false;
bool cellOutOfBoundary = CellOutOfBoundary(i_StartCell);
if (!cellOutOfBoundary)
{
cellContainsOponentColor = CellContainsColor(i_StartCell, oponentColor);
}
while (!cellOutOfBoundary && cellContainsOponentColor)
{
i_StartCell.MoveToDirection(i_Direction);
cellOutOfBoundary = CellOutOfBoundary(i_StartCell);
if (!cellOutOfBoundary)
{
cellContainsOponentColor = CellContainsColor(i_StartCell, oponentColor);
cellContainsCurrentPlayerColor = CellContainsColor(i_StartCell, i_CurrentPlayerColor);
}
}
o_EndCell = new Cell(i_StartCell.Row, i_StartCell.Col);
return(!cellOutOfBoundary && cellContainsCurrentPlayerColor);
}
public void Initialize()
{
// this method is initializing the player options, scores and board.
m_GameBoard.Initialize();
initializePlayersOptions();
initializePlayersCurrentRoundScores();
m_PlayerTurn = Player.eColor.Yellow;
}
private int playerIndex(Player.eColor i_PlayerColor)
{
// this method recieves a player color and return the index by int
int index;
index = (char)(i_PlayerColor) - '0';
return(index);
}
private bool isCellAnEnemy(Cell i_CellIterator, Player.eColor i_CurrentPlayerTurn)
{
// this method return true if the sign of the input cell is different from i_CurrentPlayerTurn
bool isCellEnemy;
isCellEnemy = i_CellIterator.Sign != (char)i_CurrentPlayerTurn && i_CellIterator.Sign != Cell.k_Empty;
return(isCellEnemy);
}
public void UpdateBoard(List <Cell> i_CellsToUpdate, Player.eColor i_PlayingPlayer)
{
// this method recieves a list of cells and a player color and put the correct sign in those cells.
foreach (Cell currentCell in i_CellsToUpdate)
{
m_Board[currentCell.Row, currentCell.Column].Sign = (char)i_PlayingPlayer;
}
i_CellsToUpdate.Clear();
}
private void enableAllLegalPlayerPictureBoxs(Player.eColor i_Turn)
{
// this method is enabling all the picture boxes which represents the possible cells for the current turn
List <Cell> currentPlayerOptionList;
currentPlayerOptionList = i_Turn == Player.eColor.Yellow ? m_GameLogic.YellowPlayerOptions : m_GameLogic.RedPlayerOptions;
foreach (Cell cell in currentPlayerOptionList)
{
enableRepresentingPictureBox(cell);
}
}
private static int heuristic(Board i_Board, Player.eColor i_playerTurn)
{
// heuristic method for Minimax algorithm
int heuristicResult;
int differencePCHuman;
char playerTurnSign;
heuristicResult = 0;
differencePCHuman = differencePCScoreHumanScore(i_Board);
playerTurnSign = i_playerTurn == Player.eColor.Red ? (char)Player.eColor.Red : (char)Player.eColor.Yellow;
heuristicResult += getCornersHeuristic(i_Board, playerTurnSign);
return(heuristicResult + differencePCHuman);
}
public void UpdateBoardCauseLegalMove(Move i_Move, Player.eColor i_Color)
{
List <Directions> MoveValidDirections = i_Move.ValidDirections;
List <Cell> MoveValidEndCells = i_Move.ValidEndCells;
Cell startCell;
for (int i = 0; i < MoveValidDirections.Count; i++)
{
startCell = new Cell(i_Move.Row, i_Move.Col);
Directions validDirection = MoveValidDirections[i];
Cell finalCellInDirection = MoveValidEndCells[i];
fillsCells(startCell, validDirection, finalCellInDirection, i_Color);
}
}
private bool isPlayerOptionEmpty(Player.eColor i_PlayerColor)
{
// this method recieve a player color and return true if his options list is empty.
bool isOptionListEmpty;
if (i_PlayerColor == Player.eColor.Red)
{
isOptionListEmpty = m_RedPlayerOptions.Count == 0;
}
else
{
// if not red player - than its a yellow player.
isOptionListEmpty = m_YellowPlayerOptions.Count == 0;
}
return(isOptionListEmpty);
}
public int AmountOfColorInBoard(Player.eColor i_Color)
{
char colorToCheck = (char)i_Color;
int counterColor = 0;
for (int i = 0; i < r_Height; i++)
{
for (int j = 0; j < r_Width; j++)
{
if (m_Board[i, j] == colorToCheck)
{
counterColor++;
}
}
}
return(counterColor);
}
private static bool isGameOver(Board i_GameBoardState, Player.eColor i_MaximizingPlayer)
{
// this method passing all cell in the list and check if their is an option for maximizingPlayer
GameLogic tempGameManager = new GameLogic(i_GameBoardState, i_MaximizingPlayer);
List <Cell> cellLists = new List <Cell>();
bool addToCellsList, isCellAnOption, currentGameNotOver;
addToCellsList = false;
currentGameNotOver = false;
foreach (Cell cellIteator in i_GameBoardState.Matrix)
{
isCellAnOption = tempGameManager.isPlayerMoveBlockingEnemy(cellIteator, ref cellLists, addToCellsList);
if (isCellAnOption)
{
return(currentGameNotOver);
}
}
currentGameNotOver = true;
return(currentGameNotOver);
}
public PcPlayer(Player.eColor i_PlayerColor)
{
// PcPlayer c'tor
m_PlayerColor = i_PlayerColor;
}
public HumanPlayer(Player.eColor i_PlayerColor)
{
// Human player c'tor
m_PlayerColor = i_PlayerColor;
}
private void fillsCells(Cell i_FromCell, Directions i_Direction, Cell i_ToCell, Player.eColor i_Color)
{
while (!i_FromCell.AtSameLocationLikeCell(i_ToCell))
{
PlacePiece(i_FromCell.Row, i_FromCell.Col, i_Color);
i_FromCell.MoveToDirection(i_Direction);
}
}
public void PlacePiece(int i_Height, int i_Width, Player.eColor i_Color)
{
m_Board[i_Height, i_Width] = (char)i_Color;
}
Player.eColor GetOponentColor(Player.eColor i_Color)
{
return(i_Color == Player.eColor.White? Player.eColor.Black : Player.eColor.White);
}
bool CellContainsColor(Cell i_CellToCheck, Player.eColor i_Color)
{
char cellValueInBoard = GetPiece(i_CellToCheck.Row, i_CellToCheck.Col);
return(cellValueInBoard == (char)i_Color);
}
public static int Minimax(Board i_GameBoardState, int i_Depth, Player.eColor i_MaximizingPlayer, ref Cell io_Cell, ref List <KeyValuePair <int, List <Cell> > > io_ListOfKeyValue)
{
// this method return a List of pairs < heuristic score , list of cells that lead to this score >
// using Minimax algorithm, it return that list of pair I described by ref
GameLogic gameMangaerAI = new GameLogic(i_GameBoardState, i_MaximizingPlayer);
List <Cell> playerOptionList = new List <Cell>();
List <Cell> playerMovesList = new List <Cell>();
KeyValuePair <int, List <Cell> > scoreAndCellsListPair;
Board copiedBoard;
int eval, minEval, maxEval;
if (i_Depth == 0 || isGameOver(i_GameBoardState, i_MaximizingPlayer))
{
return(heuristic(i_GameBoardState, i_MaximizingPlayer));
}
else
{
gameMangaerAI.updatePlayersOptions();
if (i_MaximizingPlayer == Player.eColor.Red)
{
// this is PC's turn - Choose max value
maxEval = int.MinValue;
foreach (Cell cellIteator in gameMangaerAI.RedPlayerOptions)
{
copiedBoard = gameMangaerAI.GameBoard.Clone();
gameMangaerAI.isPlayerMoveBlockingEnemy(cellIteator, ref playerOptionList);
copiedBoard.UpdateBoard(playerOptionList, i_MaximizingPlayer);
eval = Minimax(copiedBoard, i_Depth - 1, Player.eColor.Yellow, ref io_Cell, ref io_ListOfKeyValue);
if (eval > maxEval)
{
playerMovesList.Add(io_Cell);
scoreAndCellsListPair = new KeyValuePair <int, List <Cell> >(eval, playerMovesList);
io_ListOfKeyValue.Add(scoreAndCellsListPair);
io_Cell.Row = cellIteator.Row;
io_Cell.Column = cellIteator.Column;
maxEval = eval;
}
}
return(maxEval);
}
else
{
// this is Human player - Choose min value
minEval = int.MaxValue;
foreach (Cell cellIteator in gameMangaerAI.YellowPlayerOptions)
{
copiedBoard = gameMangaerAI.GameBoard.Clone();
gameMangaerAI.isPlayerMoveBlockingEnemy(cellIteator, ref playerOptionList);
copiedBoard.UpdateBoard(playerOptionList, i_MaximizingPlayer);
eval = Minimax(copiedBoard, i_Depth - 1, Player.eColor.Red, ref io_Cell, ref io_ListOfKeyValue);
if (eval < minEval)
{
playerMovesList.Add(io_Cell);
scoreAndCellsListPair = new KeyValuePair <int, List <Cell> >(eval, playerMovesList);
io_ListOfKeyValue.Add(scoreAndCellsListPair);
minEval = eval;
}
}
return(minEval);
}
}
}
