public static Vector3D Transform(Vector3D v)
{
double angle = Math.PI / 3; // Kind of weird, and not really controllable.
v.RotateAboutAxis(new Vector3D(1, 0), angle);
Mobius m = new Mobius();
m.Isometry(Geometry.Hyperbolic, 0, new Complex(0, 0.5));
v = H3Models.TransformHelper(v, m);
v.RotateAboutAxis(new Vector3D(1, 0), -angle);
return(v);
}
/// <summary>
/// Face centered orientation.
/// </summary>
internal static void FCOrient(H3.Cell cell)
{
// First, need to scale so the lowest triangles are the same size,
// then reorient so that one triangle is oriented along z axis,
// then scale so that the triangle is flat.
// Calculate how much we need to offset to make the cell facet flat.
Mobius m = FCOrientMobius(cell.Facets[0].Sphere);
foreach (H3.Cell.Facet f in cell.Facets)
{
H3Models.TransformInBall2(f.Sphere, m);
}
cell.Center = H3Models.TransformHelper(cell.Center, m);
}