Right now, you can convert a `ScaleX` into an `AffineX` with `nalgebra::convert`; I think this uses the [`SubsetOf`](https://docs.rs/nalgebra/latest/nalgebra/geometry/struct.Scale.html#impl-SubsetOf%3CTransform%3CT2,+C,+D%3E%3E-for-Scale%3CT1,+D%3E) trait. Reflections are _also_ affine transformations, but there's no such conversion available.
