public static IEnumerable <Point> EnumeratePointsAtChebyshevDistance(
this Point source, int distance, bool clockwise, bool orderByEuclideanDistance, Dir8 startDir = Dir8.N)
{
if (distance < 0)
{
throw new ArgumentException("distance must be nonnegative");
}
if (!startDir.IsValid(false))
{
throw new ArgumentException("startDir must be an orthogonal or diagonal");
}
if (orderByEuclideanDistance && startDir.IsDiagonal())
{
// If ordering by Euclidean distance, we'll be starting at an orthogonal direction anyway:
startDir = startDir.Rotate(clockwise);
}
return(source.PointsAtChebyshevDistanceInternal(distance, clockwise, orderByEuclideanDistance, startDir));
}
public static IEnumerable <Point> EnumeratePointsByChebyshevDistance(
this Point source, bool clockwise, bool orderByEuclideanDistance, Dir8 startDir = Dir8.N)
{
if (!startDir.IsValid(false))
{
throw new ArgumentException("startDir must be an orthogonal or diagonal");
}
if (orderByEuclideanDistance && startDir.IsDiagonal())
{
// If ordering by Euclidean distance, we'll be starting at an orthogonal direction anyway:
startDir = startDir.Rotate(clockwise);
}
for (int distance = 0; ; ++distance)
{
foreach (Point p in source.PointsAtChebyshevDistanceInternal(distance, clockwise, orderByEuclideanDistance, startDir))
{
yield return(p);
}
}
}
