public static IEnumerable <Point2> NeighboursOfType(this IReadOnlyGrid <TileType> map, Point2 middle, TileType type, bool cornersIncluded = false)
{
for (var y = -1; y <= 1; y++)
{
for (var x = -1; x <= 1; x++)
{
if (!cornersIncluded && Math.Abs(x) == Math.Abs(y))
{
continue;
}
if (map.At(x, y) == type)
{
yield return(new Point2(middle.X + x, middle.Y + y));
}
}
}
}
public static TileType At(this IReadOnlyGrid <TileType> map, int x, int y)
{
return(map.At(new Point2(x, y)));
}