hexRing method
Hollow hexagon ring at some origin
Implementation
@override
List<BigInt> hexRing(BigInt h3Index, int ringSize) {
return using((arena) {
final kIndex = ringSize == 0 ? 1 : 6 * ringSize;
final out = arena<Uint64>(kIndex);
final resultCode = _h3c.hexRing(h3Index.toInt(), ringSize, out);
if (resultCode != 0) {
throw H3Exception('Failed to get hexRing (encountered a pentagon?)');
}
final list = out.asTypedList(kIndex).toList();
return list.where((e) => e != 0).map((e) => e.toBigInt()).toList();
});
}