private void UpdateInvalidFieldBoundaries(GridPoint center)
{
BimaruValue centerValue = GetFieldValueNoCheck(center);
foreach (Direction direction in Directions.GetAllDirections())
{
BimaruValue neighbourValue = this[center.GetNextPoint(direction)];
FieldBoundary boundary = center.GetBoundary(direction);
if (centerValue.IsCompatibleWith(direction, neighbourValue))
{
invalidFieldBoundaries.Remove(boundary);
}
else
{
invalidFieldBoundaries.Add(boundary);
}
}
}