/// <summary>
/// Provjerava da li je određena ćelija okružena (horizontalno i vertikalno) sa crnim poljima.
/// </summary>
/// <param name="row"></param>
/// <param name="column"></param>
/// <returns></returns>
internal bool IsCellSurroundedWithBlack(int row, int column)
{
int filledCells = 0;
if ((row - 1) >= 0)
{
if (solver.CellIsBlack((row - 1), column))
{
++filledCells;
}
}
else if ((row - 1) < 0)
{
++filledCells;
}
if ((row + 1) < solver.gridHeight)
{
if (solver.CellIsBlack((row + 1), column))
{
++filledCells;
}
}
else if ((row + 1) >= solver.gridHeight)
{
++filledCells;
}
if ((column - 1) >= 0)
{
if (solver.CellIsBlack(row, (column - 1)))
{
++filledCells;
}
}
else if ((column - 1) < 0)
{
++filledCells;
}
if ((column + 1) < solver.gridWidth)
{
if (solver.CellIsBlack(row, (column + 1)))
{
++filledCells;
}
}
else if ((column + 1) >= solver.gridWidth)
{
++filledCells;
}
if (filledCells == 4)
{
return(true);
}
return(false);
}
private bool FourBlacks()
{
for (int i = 0; i < (solver.gridHeight - 1); i++)
{
for (int j = 0; j < (solver.gridWidth - 1); j++)
{
if (solver.CellIsBlack(i, j) && solver.CellIsBlack(i, (j + 1)) &&
solver.CellIsBlack((i + 1), j) && solver.CellIsBlack((i + 1), (j + 1)))
{
return(true);
}
}
}
return(false);
}
