protected override int OnGetBlockingMoves(int start, int[] moves, int[] ray, int rayLen)
{
int begin = start;
for (int i = 0; i < rayLen; ++i)
{
int square = ray[i];
int dir = StraightAttackLookup[Square.Ox88Dist(square, HomeSquare)];
if ((PinStatus == PinStatus.None || PinCompatible(dir)) &&
AttackPathFree(dir, square))
{
int castlingMask = 0;
if (HomeSquare == kingSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskKing & (int)board.CastlingStatus);
}
if (HomeSquare == queenSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskQueen & (int)board.CastlingStatus);
}
moves[start++] = MovePackHelper.Pack(HomeSquare, square) | castlingMask;
}
}
return(start - begin);
}
protected override int OnGetMoves(int start, int[] moves)
{
int castling = 0;
castling = MovePackHelper.GetCastlingMerge(castlingMask & (int)board.CastlingStatus);
int begin = start;
foreach (int dest in rose)
{
if (Square.SquareValid(HomeSquare + dest) && (PinEscape(dest) || dest + HomeSquare == Checker.HomeSquare) && !board.InAttack(HomeSquare + dest, Owner))
{
if (board.BoardArray[HomeSquare + dest] == null)
{
moves[start++] = MovePackHelper.Pack(HomeSquare, HomeSquare + dest) | castling;
}
else
if (IsEnemy(HomeSquare + dest))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[HomeSquare + dest]) | castling;
}
}
}
if (CheckCount == 0)
{
// castlings
if (0 != ((int)board.CastlingStatus & castlingKing) && CastlingKingSideFree && KingSideUnattacked())
{
moves[start++] = MovePackHelper.Pack(HomeSquare, HomeSquare + EAST + EAST) | castling | MovePackHelper.Castling;
}
if (0 != ((int)board.CastlingStatus & castlingQueen) && CastlingQueenSideFree && QueenSideUnattacked())
{
moves[start++] = MovePackHelper.Pack(HomeSquare, HomeSquare + WEST + WEST) | castling | MovePackHelper.Castling;
}
}
return(start - begin);
}
protected override int OnGetCaptureMoves(int start, int[] moves, int square)
{
int dir = StraightAttackLookup[Square.Ox88Dist(square, HomeSquare)];
if ((PinStatus == PinStatus.None || PinCompatible(dir)) &&
AttackPathFree(dir, square) &&
board.BoardArray[square] != null &&
IsEnemy(square))
{
int castlingMask = 0;
if (HomeSquare == kingSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskKing & (int)board.CastlingStatus);
}
if (HomeSquare == queenSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskQueen & (int)board.CastlingStatus);
}
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[square]) | castlingMask;
return(1);
}
return(0);
}
protected override int OnGetCaptureMoves(int start, int[] moves, int square)
{
int rd = Square.Rank(square) - Square.Rank(HomeSquare);
int cd = Square.Col(square) - Square.Col(HomeSquare);
if (rd == -1)
{
rd *= -1;
}
if (cd == -1)
{
cd *= -1;
}
if (rd <= 1 && cd <= 1 && IsEnemy(square))
{
int castling = MovePackHelper.GetCastlingMerge(castlingMask & (int)board.CastlingStatus);
if (!board.InAttack(square, Owner))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[square]) | castling;
return(1);
}
}
return(0);
}
protected override int OnGetMoves(int start, int[] moves)
{
int begin = start;
int sq;
//NORTH
int castlingMask = 0;
if (HomeSquare == kingSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskKing & (int)board.CastlingStatus);
}
if (HomeSquare == queenSide)
{
castlingMask = MovePackHelper.GetCastlingMerge(castlingMaskQueen & (int)board.CastlingStatus);
}
if (PinStatus == PinStatus.None || (PinStatus & PinStatus.NS) != 0)
{
sq = HomeSquare;
while (Square.SquareValid(sq + NORTH))
{
sq += NORTH;
if (board.BoardArray[sq] == null)
{
moves[start++] = MovePackHelper.Pack(HomeSquare, sq) | castlingMask;
}
else
{
if (IsEnemy(sq))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[sq]) | castlingMask;
}
break;
}
}
}
//WEST
if (PinStatus == PinStatus.None || (PinStatus & PinStatus.WE) != 0)
{
sq = HomeSquare;
while (Square.SquareValid(sq + WEST))
{
sq += WEST;
if (board.BoardArray[sq] == null)
{
moves[start++] = MovePackHelper.Pack(HomeSquare, sq) | castlingMask;
}
else
{
if (IsEnemy(sq))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[sq]) | castlingMask;
}
break;
}
}
}
//SOUTH
if (PinStatus == PinStatus.None || (PinStatus & PinStatus.NS) != 0)
{
sq = HomeSquare;
while (Square.SquareValid(sq + SOUTH))
{
sq += SOUTH;
if (board.BoardArray[sq] == null)
{
moves[start++] = MovePackHelper.Pack(HomeSquare, sq) | castlingMask;
}
else
{
if (IsEnemy(sq))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[sq]) | castlingMask;
}
break;
}
}
}
//EAST
if (PinStatus == PinStatus.None || (PinStatus & PinStatus.WE) != 0)
{
sq = HomeSquare;
while (Square.SquareValid(sq + EAST))
{
sq += EAST;
if (board.BoardArray[sq] == null)
{
moves[start++] = MovePackHelper.Pack(HomeSquare, sq) | castlingMask;
}
else
{
if (IsEnemy(sq))
{
moves[start++] = MovePackHelper.Pack(this, board.BoardArray[sq]) | castlingMask;
}
break;
}
}
}
return(start - begin);
}