public static bool AxisAligned(IList <Hex> hexes, Position direction)
{
if (null == hexes || hexes.Count < 2)
{
return(true);
}
Hex directionHex = Neighborhood.GetDirectionHex(direction);
Hex directionOppositeHex = Neighborhood.GetDirectionHex(Neighborhood.GetOpposite(direction));
return(hexes.Skip(1).All(h =>
AxisAligned(hexes[0], h) &&
(DirectionHex(hexes[0], h) == directionHex || DirectionHex(hexes[0], h) == directionOppositeHex)
));
}
public static bool IsCongruent(Board board1, Board board2)
{
if (!EqualPiecesInPlay(board1, board2))
{
return(false);
}
// check reflection congruence
for (int i = 1; i <= 6; i++)
{
bool isCongruent = true;
foreach (Cell cell in board1._cellMap.Values)
{
if (cell.Piece != board2._cellMap[Neighborhood.MirrorOriginHex(cell.hex, i)].Piece)
{
isCongruent = false;
break;
}
}
if (isCongruent)
{
return(true);
}
}
// check rotational congruence
for (int i = 1; i < 6; i++)
{
bool isCongruent = true;
foreach (Cell cell in board1._cellMap.Values)
{
if (cell.Piece != board2._cellMap[Neighborhood.Rotate60DegreesClockwiseHex(cell.hex, i)].Piece)
{
isCongruent = false;
break;
}
}
if (isCongruent)
{
return(true);
}
}
return(false);
}
public void PostProcessHandler(object sender, EventArgs e)
{
_extendedRunsOfFour = new List <CellRun>();
foreach (CellRun run in RunsOfFourOrMore)
{
Cell end1 = run.First;
Cell end2 = run.Last;
Position direction2 = Neighborhood.GetDirection(end1.hex, end2.hex);
Position direction1 = Neighborhood.GetDirection(end2.hex, end1.hex);
Cell currentCell = end1.NeighborhoodCells[direction1];
List <Cell> cellList = new List <Cell>(run.Run);
while (!(currentCell is Wall) && currentCell.Piece.Color != PieceColor.None)
{
cellList.Add(currentCell);
currentCell = currentCell.NeighborhoodCells[direction1];
}
// now go the other way
currentCell = end2.NeighborhoodCells[direction2];
while (!(currentCell is Wall) && currentCell.Piece.Color != PieceColor.None)
{
cellList.Add(currentCell);
currentCell = currentCell.NeighborhoodCells[direction2];
}
_extendedRunsOfFour.Add(new CellRun(cellList));
}
// track intersectons
HashSet <Hex> hexesInRuns = new HashSet <Hex>();
_extendedRunsOfFour.All(l => l.Run.All((c) =>
{
if (hexesInRuns.Contains(c.hex))
{
_intersections.Add(c);
}
else
{
hexesInRuns.Add(c.hex);
}
return(true);
}
));
}
public RemoveMovePart(IEnumerable <Hex> removeList)
{
_hexesToRemove = removeList.ToList();
_direction = Neighborhood.GetDirection(_hexesToRemove.First(), _hexesToRemove.Last());
}
public static void LinkCells(Cell from, Cell to, Position pos)
{
from.neighborhood[pos] = to;
to.neighborhood[Neighborhood.GetOpposite(pos)] = from;
}
/*
* private void AddPossibleMoves(List<Hex> removeBeforeList, Board prePushRemovedBoard, Hex wallHex, Position pos, bool isGipf)
* {
* Board pushBoard = prePushRemovedBoard.Clone();
* Wall pWall = (Wall)pushBoard.Cells[wallHex];
*
* pWall.Push(pos, new GipfPiece(isGipf ? 2 : 1, colorToPlay));
* pushBoard.FindRuns();
* pushBoard.CalculateAllPossibleRemoveLists();
*
* foreach (IReadOnlyList<Hex> removeAfterList in pushBoard.AllPossibleRemoveLists)
* {
* Move move = new Move(pWall.hex, pWall.NeighborhoodCells[pos].hex, removeBeforeList.ToList(), removeAfterList.ToList(), isGipf);
* move.SimplifyMove(prePushRemovedBoard);
* _moves.Add(move);
* }
* }
*/
/// <summary>
/// Make a move. Validates the move or fails.
/// </summary>
/// <param name="move"></param>
public bool TryMakeMove(Move move)
{
try
{
if (_gameResult != GameResult.Incomplete)
{
throw new Exception("This game is over");
}
if (false == _canPlayGipf[(int)ColorToPlay] && move.isGipf)
{
throw new Exception("Cannot play a Gipf piece at this time");
}
GipfPiece piece = Pieces.GetPiece(this, move);
Position direction = Neighborhood.GetDirection(move.from, move.to);
if (move.isPlacement)
{
if (_cellMap[move.to].Piece.Color != PieceColor.None)
{
throw new Exception($"Trying to place on top of an existing piece: {move.to.column}, {move.to.row}");
}
}
else
{
if (!(_cellMap[move.from] is Wall))
{
throw new Exception($"Trying to push from a non-wall: {move.from.column}, {move.from.row} => {direction}");
}
if (!_cellMap[move.from].CanPush(direction))
{
throw new Exception($"Cannot push here: {move.from.column}, {move.from.row} => {direction}");
}
}
RemoveOrCapturePieces(move.removeBefore);
// TODO if the run of four is all gipf, do not throw an exception
if (ExtendedRunsOfFour.Count != 0)
{
throw new Exception("Pre-push removal did not clear all extended runs of four");
}
if (move.isPlacement)
{
_cellMap[move.to].SetPiece(piece);
}
else
{
_cellMap[move.from].Push(direction, piece);
}
_runsDirty = true;
RemoveFromReserve(piece.Color, piece.NumPieces);
RemoveOrCapturePieces(move.removeAfter);
if (ExtendedRunsOfFour.Count(r => r.Color == ColorToPlay) != 0)
{
throw new Exception($"Post-push removal did not clear all extended runs of four of current player's color ({ColorToPlay})");
}
if (!move.isGipf)
{
_canPlayGipf[(int)ColorToPlay] = false;
}
_movesDirty = true;
IncrementTurn();
return(true);
}
catch (Exception ex)
{
_lastError = ex.Message;
return(false);
}
}