[Lib2geom-devel] Reflect transform

[Krzysztof K. <twe...@gm...>]

Hello

I saw that a Reflect transform was added to 2geom recently. It does
not satisfy the requirements of TransformConcept:
1. Reflect * Reflect != Reflect (in fact there is no multiplication
operator at all)
2. There is no identity element.

Transforms are intended to be subgroups of Affine. Reflections are not
a subgroup, so they should not be represented as a transform class.
Instead, a function called Geom::reflection should return an Affine
that represents the requested reflection.

Regards, Krzysztof