public static IEnumerable <Point> EnumeratePointsAtManhattanDistance(
this Point source, int distance, bool clockwise, Dir4 startDir = Dir4.N)
{
if (distance < 0)
{
throw new ArgumentException("distance must be nonnegative");
}
if (!startDir.IsValid(false))
{
throw new ArgumentException("startDir must be an orthogonal direction");
}
return(source.PointsAtManhattanDistanceInternal(distance, clockwise, startDir));
}
public static IEnumerable <Point> EnumeratePointsByManhattanDistance(
this Point source, bool clockwise, Dir4 startDir = Dir4.N)
{
if (!startDir.IsValid(false))
{
throw new ArgumentException("startDir must be an orthogonal direction");
}
for (int distance = 0; ; ++distance)
{
foreach (Point p in source.PointsAtManhattanDistanceInternal(distance, clockwise, startDir))
{
yield return(p);
}
}
}
