Implement a CompositeBoundary

[JonasIsensee]

Just an idea. In particular this could be extensively discussed in docs
to highlight extensibility.
This CompositeBoundary would
implement a way to treat each boundary with a separate condition type.
( difficult could be corners)

I would like to see if this could be used to easily create a mobius strip.

---

Want to back this issue? Post a bounty on it! We accept bounties via Bountysource.

[Datseris]

Here you imagine something like e.g. Periodic boundary in let's say in x direction and constant in y direction?

Or even a totally new type of boundary?

Edit: i didn't get the mobius strip part, specifically how it could represent a dynamical system.