public PatternMap FindPatterns(GoBoard goBoard, Color playerToMove)
{
PatternMap lPatternMap = new PatternMap(goBoard, playerToMove);
if (DFAMatrix == null)
{
return(lPatternMap);
}
for (int lOrigin = 0; lOrigin < goBoard.Coord.BoardArea; lOrigin++)
{
if (goBoard.GetSafetyStatus(lOrigin).IsUndecided)
{
if (goBoard.IsLegal(lOrigin, playerToMove))
{
Coordinate lStart = new Coordinate(goBoard.Coord.GetColumn(lOrigin), goBoard.Coord.GetRow(lOrigin));
int lState = 1;
Coordinate lSpiral = new Coordinate(0, 0);
while (true)
{
Coordinate lAt = lStart + lSpiral;
lSpiral.SpiralNext();
char c = '#';
if (lAt.IsOnBoard(goBoard.BoardSize))
{
c = goBoard.GetColor(goBoard.Coord.At(lAt.X, lAt.Y)).ToChar();
if (playerToMove.IsBlack)
{
// patterns are stored in white moves next
// so flip colors when is black's turn
if (c == 'O')
{
c = 'X';
}
else if (c == 'X')
{
c = 'O';
}
}
}
lState = DFAMatrix.GetPatterns(lState, c, lPatternMap, lStart, lOrigin);
if (lState == 0)
{
break;
}
}
}
}
}
return(lPatternMap);
}
public override TriState IsGoalAccomplished()
{
Color lColor = Board.GetColor(BlockPosition);
SafetyStatus lSafety = Board.GetSafetyStatus(BlockPosition);
if (lColor == Player)
{
if (lSafety.IsAlive)
{
return(TriState.True);
}
if (lSafety.IsDead)
{
return(TriState.False);
}
}
else
if (lColor == Player.Opposite)
{
if (lSafety.IsAlive)
{
return(TriState.False);
}
if (lSafety.IsDead)
{
return(TriState.True); // well, maybe (turned into safe territory)
}
}
else
if (lColor == Color.Empty)
{
if (lSafety.IsTerritory && lSafety.Player == Player)
{
return(TriState.True); // well, maybe (turned into safe territory)
}
if (lSafety.IsTerritory && lSafety.Player == Player.Opposite)
{
return(TriState.False);
}
}
return(TriState.Unknown);
}
public static int LibertyCountAfterMove(GoBoard goBoard, Color player, int move)
{
if (!goBoard.GetColor(move).IsEmpty)
{
return(0); // invalid
}
if (goBoard.IsSuicide(move, player))
{
return(0);
}
goBoard.PlayStone(move, player, true);
int lLiberities = goBoard.GetBlockLibertyCount(move);
goBoard.Undo();
return(lLiberities);
}
public GoalSave(GoBoard goBoard, int pBlockPosition)
{
Board = goBoard;
BlockPosition = pBlockPosition;
Player = Board.GetColor(pBlockPosition);
}
public PatternMap FindPatterns(GoBoard goBoard, Color playerToMove, List<int> legalMoves)
{
PatternMap lPatternMap = new PatternMap(goBoard, playerToMove);
if (DFAMatrix == null)
return lPatternMap;
foreach (int lOrigin in legalMoves)
{
int lState = 1;
Coordinate lStart = new Coordinate(goBoard.Coord.GetColumn(lOrigin), goBoard.Coord.GetRow(lOrigin));
Coordinate lSpiral = new Coordinate(0, 0);
while (true)
{
Coordinate lAt = lStart + lSpiral;
lSpiral.SpiralNext();
char c = '#';
if (lAt.IsOnBoard(goBoard.BoardSize))
{
c = goBoard.GetColor(goBoard.Coord.At(lAt.X, lAt.Y)).ToChar();
if (playerToMove.IsBlack)
{
// patterns are stored in white moves next
// so flip colors when is black's turn
if (c == 'O') c = 'X'; else if (c == 'X') c = 'O';
}
}
lState = DFAMatrix.GetPatterns(lState, c, lPatternMap, lStart, lOrigin);
if (lState == 0)
break;
}
}
return lPatternMap;
}
public GoalSave(GoBoard goBoard, int pBlockPosition)
{
Board = goBoard;
BlockPosition = pBlockPosition;
Player = Board.GetColor(pBlockPosition);
}
public static int LibertyCountAfterMove(GoBoard goBoard, Color player, int move)
{
if (!goBoard.GetColor(move).IsEmpty)
return 0; // invalid
if (goBoard.IsSuicide(move, player))
return 0;
goBoard.PlayStone(move, player, true);
int lLiberities = goBoard.GetBlockLibertyCount(move);
goBoard.Undo();
return lLiberities;
}