/* This takes a value indicating a gameModel and returns the values of the displayable
and game models and utilities to null. */
public void UnInitialiseModel(EGameModels model)
{
switch(model)
{
case EGameModels.Chess:
chessModel = null;
evaluator = null;
break;
case EGameModels.TicTacToe:
tictactoeModel = null;
break;
}
displayableGameModel = null;
gameState = EGameControlState.PreInitial;
}
/* Take a valid-format move object and check if it may be legally
applied to the current chess game. It must pass the following checks:
-the locations are distinct and
-the A tile contains a piece of the current player
Also one of the following:
-the B tile contains a piece of the current player (further castle checks) or
-the B tile contains a piece of the opponent player (further capture checks) or
-the B tile is empty:
-(further en passant checks)
-(further movement checks)
Finally it must check, if the move were to be applied, that it does not leave the
current player's king in check.*/
public bool IsValidMove(ref FormedMove move, ChessPositionModel cpm, ref List<Tuple<int, int>> kingCheckedBy)
{
bool validMove = false;
Tile tileA = new Tile();
Tile tileB = new Tile();
if (IsMovePositionsDistinct(move))
{
if (IsMoveAPieceCurPlayer(move, cpm, ref tileA))
{
// check if its a castling
if (IsMoveBPieceCurPlayer(move, cpm, ref tileB))
{
validMove = false; // IsLegalCastle? - this involves calls to isKingInCheck
move.MoveType = EChessMoveTypes.Castle;
}
// check if its a capture
else if (IsMoveBPieceOtherPlayer(move, cpm, ref tileB))
{
validMove = IsCaptureLegal(move, cpm);
move.MoveType = EChessMoveTypes.Capture;
}
// check if its a movement
else if (IsMoveBEmpty(move, cpm, ref tileB))
{
if (validMove = IsPieceMovementLegal(move, cpm))
{
move.MoveType = EChessMoveTypes.Movement;
}
else if (validMove = IsEnPassantCaptureLegal(move, cpm))
{
move.MoveType = EChessMoveTypes.EpMovement;
}
}
}
}
// if its a valid move so far, check if there is a pawn promotion,
// then apply the move to a copy of the chess position and
// finally check it passes a check test
if (validMove)
{
// if there is a pawn promotion the player is prompted for the promotion piece and it is added to the move object
MoveIncludesPawnPromotion(ref move, cpm);
// a copy of the chess position is made so that the move may
// be applied in order for the king-check to be checked without
// causing the chess position to update the display
ChessPosition cpCopy = cpm.getChessPositionCopy();
cpCopy.applyMove(move);
// after this application of the move
if (IsKingInCheck(cpCopy, ref kingCheckedBy))
validMove = false;
}
return validMove;
}
/* Receives a value indicating a game model and sets up the model as
'displayableModel' (to which the view is bound) and also
'*Model' (which is used in the game loop etc). This method also
sets up any dependent utilities. */
public void InitialiseModel(EGameModels model, System.Windows.Forms.Form viewRef)
{
switch(model)
{
case EGameModels.Chess:
displayableGameModel = new ChessPositionModel();
chessModel = (ChessPositionModel)displayableGameModel;
evaluator = new Evaluator();
evaluator.ViewRef = viewRef;
evaluator.GenerateRays();
evaluator.GeneratePawnRays();
break;
case EGameModels.TicTacToe:
displayableGameModel = new TicTacToePositionModel();
tictactoeModel = (TicTacToePositionModel)displayableGameModel;
break;
}
gameState = EGameControlState.Initial;
}