pub fn frame_along(
origin: Vector3,
normal: &Vector3,
) -> GeopResult<CoordinateSystem>Expand description
A right-handed orthonormal frame at origin with w along normal,
and u the world axis most parallel to the plane normal to it,
projected into that plane (see Vector3::across) — so frames with
parallel normals line up, and a frame put on an axis has u where a
joint measures its turns from: two bodies mated on the same axis of each
are at a turn of zero.