private static int MaxPolyfillSize(List <GeoCoord> coords, int resolution)
{
var h3Coords = FromGeoCoords(coords);
int nbIndex = 0;
H3GeoPolygon polygon = new H3GeoPolygon();
polygon.geofence = new H3GeoFence();
GCHandle arrHandle = GCHandle.Alloc(h3Coords.ToArray(), GCHandleType.Pinned);
try
{
polygon.geofence.verts = arrHandle.AddrOfPinnedObject();
polygon.geofence.numVerts = h3Coords.Length;
polygon.numHoles = 0;
polygon.holes = IntPtr.Zero;
nbIndex = maxPolyfillSize(ref polygon, resolution);
}
finally
{
arrHandle.Free();
}
return(nbIndex);
}
public static ulong[] Polyfill(List <GeoCoord> coords, int resolution)
{
ulong[] index = null;
int nbIndex = MaxPolyfillSize(coords, resolution);
var h3Coords = FromGeoCoords(coords);
H3GeoPolygon polygon = new H3GeoPolygon();
polygon.geofence = new H3GeoFence();
GCHandle arrHandle = GCHandle.Alloc(h3Coords.ToArray(), GCHandleType.Pinned);
List <ulong> validIndexes = new List <ulong>();
try
{
polygon.geofence.verts = arrHandle.AddrOfPinnedObject();
polygon.geofence.numVerts = h3Coords.Length;
polygon.numHoles = 0;
polygon.holes = IntPtr.Zero;
index = new ulong[nbIndex + 1];
Console.Write("{0}", nbIndex);
polyfill(ref polygon, resolution, index);
for (int i = 0; i < index.Length; i++)
{
if (index[i] != 0)
{
validIndexes.Add(index[i]);
}
}
Console.WriteLine(" --> {0}", validIndexes.Count);
}
finally
{
arrHandle.Free();
}
return(validIndexes.ToArray());
}
private static extern int maxPolyfillSize(ref H3GeoPolygon polygon, int res);
private static extern void polyfill(ref H3GeoPolygon polygon, int res, ulong[] index);
