public static Point[] GetNeighboringPoints(this Point point, int? maxX = null, int? maxY = null)
{
var neighboringPoints = new[]
{
new Point(point.X, point.Y + 1),
new Point(point.X, point.Y - 1),
new Point(point.X + 1, point.Y + 1),
new Point(point.X + 1, point.Y - 1),
new Point(point.X + 1, point.Y),
new Point(point.X - 1, point.Y + 1),
new Point(point.X - 1, point.Y - 1),
new Point(point.X - 1, point.Y),
};
if (maxX.HasValue)
{
neighboringPoints = neighboringPoints.Where(x => x.X <= maxX.Value).ToArray();
}
if (maxY.HasValue)
{
neighboringPoints = neighboringPoints.Where(x => x.Y <= maxY.Value).ToArray();
}
return neighboringPoints;
}
