private static void h3Distance_kRing_assertions(H3Index h3)
{
int r = H3Index.H3_GET_RESOLUTION(h3);
Assert.True(r <= 5, "resolution supported by test function (kRing)");
int maxK = MAX_DISTANCES[r];
int sz = Algos.maxKringSize(maxK);
var neighbors = new H3Index[sz].ToList();
var distances = new int[sz].ToList();
Algos.kRingDistances(h3, maxK, ref neighbors, ref distances);
for (int i = 0; i < sz; i++)
{
if (neighbors[i] == 0)
{
continue;
}
int calculatedDistance = LocalIJ.h3Distance(h3, neighbors[i]);
// Don't consider indexes where h3Distance reports failure to
// generate
Assert.True(calculatedDistance == distances[i] || calculatedDistance == -1,
"kRingDistances matches h3Distance");
}
}
public void testIndexDistance()
{
H3Index bc = 0;
H3Index.setH3Index(ref bc, 1, 17, (Direction)0);
H3Index p = 0;
H3Index.setH3Index(ref p, 1, 14, (Direction)0);
H3Index p2 = 0;
H3Index.setH3Index(ref p2, 1, 14, (Direction)2);
H3Index p3 = 0;
H3Index.setH3Index(ref p3, 1, 14, (Direction)3);
H3Index p4 = 0;
H3Index.setH3Index(ref p4, 1, 14, (Direction)4);
H3Index p5 = 0;
H3Index.setH3Index(ref p5, 1, 14, (Direction)5);
H3Index p6 = 0;
H3Index.setH3Index(ref p6, 1, 14, (Direction)6);
Assert.True(LocalIJ.h3Distance(bc, p) == 3, "distance onto pentagon");
Assert.True(LocalIJ.h3Distance(bc, p2) == 2, "distance onto p2");
Assert.True(LocalIJ.h3Distance(bc, p3) == 3, "distance onto p3");
// TODO works correctly but is rejected due to possible pentagon
// distortion.
// t_assert(H3_EXPORT(h3Distance)(bc, p4) == 3, "distance onto p4");
// t_assert(H3_EXPORT(h3Distance)(bc, p5) == 4, "distance onto p5");
Assert.True(LocalIJ.h3Distance(bc, p6) == 2, "distance onto p6");
}
public void h3DistanceBaseCells()
{
Assert.True(LocalIJ.h3Distance(bc1, pent1) == 1,
"distance to neighbor is 1 (15, 4)");
Assert.True(LocalIJ.h3Distance(bc1, bc2) == 1,
"distance to neighbor is 1 (15, 8)");
Assert.True(LocalIJ.h3Distance(bc1, bc3) == 1,
"distance to neighbor is 1 (15, 31)");
Assert.True(LocalIJ.h3Distance(pent1, bc3) == -1,
"distance to neighbor is invalid");
}
public void testIndexDistance2()
{
H3Index origin = 0x820c4ffffffffffL;
// Destination is on the other side of the pentagon
H3Index destination = 0x821ce7fffffffffL;
// TODO doesn't work because of pentagon distortion. Both should be 5.
Assert.True(LocalIJ.h3Distance(destination, origin) == -1,
"distance in res 2 across pentagon");
Assert.True(LocalIJ.h3Distance(origin, destination) == -1,
"distance in res 2 across pentagon (reversed)");
}
public void h3DistanceEdge()
{
H3Index origin = 0x832830fffffffffL;
H3Index dest = 0x832834fffffffffL;
H3Index edge = H3UniEdge.getH3UnidirectionalEdge(origin, dest);
Assert.True(0 != edge, "test edge is valid");
Assert.True(LocalIJ.h3Distance(edge, origin) == 0,
"edge has zero distance to origin");
Assert.True(LocalIJ.h3Distance(origin, edge) == 0,
"origin has zero distance to edge");
Assert.True(LocalIJ.h3Distance(edge, dest) == 1,
"edge has distance to destination");
Assert.True(LocalIJ.h3Distance(edge, dest) == 1,
"destination has distance to edge");
}
public static int H3Distance(Code.H3Index origin, Code.H3Index h3)
{
return(LocalIJ.h3Distance(origin, h3));
}
public void h3DistanceResolutionMismatch()
{
Assert.True(
LocalIJ.h3Distance(0x832830fffffffffL, 0x822837fffffffffL) == -1,
"cannot compare at different resolutions");
}
private static void h3Distance_identity_assertions(H3Index h3)
{
Assert.True(LocalIJ.h3Distance(h3, h3) == 0, "distance to self is 0");
}