public bool Mark(int x, int y, PlayerMark playerMark)
{
if (!_Cells[x, y].Empty)
{
return(false);
}
BoardState boardState = _Stack[_StackPointer++];
CopyBoardState(_CurrentBoardState, boardState);
boardState.Point = new Point2D(x, y);
_EmptyCount--;
_Cells[x, y] = Cell.Get(playerMark);
int index = (int)playerMark;
int count = _CurrentBoardState.MaxCountInRowPerMark[index];
if (count >= CountInRow)
{
return(true);
}
int primaryDiagonal = 1;
bool primaryDiagonalInRowBackward = true;
bool primaryDiagonalInRowForward = true;
int secondaryDiagonal = 1;
bool secondaryDiagonalInRowBackward = true;
bool secondaryDiagonalInRowForward = true;
int horizontal = 1;
bool horizontalInRowBackward = true;
bool horizontalInRowForward = true;
int vertical = 1;
bool verticalInRowBackward = true;
bool verticalInRowForward = true;
for (int i = 1; i < CountInRow; i++)
{
int pdx = x + i;
int pdy = y + i;
int ndx = x - i;
int ndy = y - i;
ProcessCoords(playerMark, ref primaryDiagonal, ref primaryDiagonalInRowBackward, ndx, ndy);
ProcessCoords(playerMark, ref primaryDiagonal, ref primaryDiagonalInRowForward, pdx, pdy);
ProcessCoords(playerMark, ref secondaryDiagonal, ref secondaryDiagonalInRowBackward, ndx, pdy);
ProcessCoords(playerMark, ref secondaryDiagonal, ref secondaryDiagonalInRowForward, pdx, ndy);
ProcessCoords(playerMark, ref horizontal, ref horizontalInRowBackward, ndx, y);
ProcessCoords(playerMark, ref horizontal, ref horizontalInRowForward, pdx, y);
ProcessCoords(playerMark, ref vertical, ref verticalInRowBackward, x, ndy);
ProcessCoords(playerMark, ref vertical, ref verticalInRowForward, x, pdy);
}
int candidateCount = Math.Max(Math.Max(horizontal, vertical), Math.Max(primaryDiagonal, secondaryDiagonal));
_CurrentBoardState.MaxCountInRowPerMark[index] = Math.Max(candidateCount, count);
return(true);
}
