Known issues/TODO for this branch:

• missing i18n for the new input
• the generation still happens within the original rectangle
• missing tests for rotation

Thanks a lot for your contribution! Supporting rotation is a feature which we've been looking for for some time now, so this will be very helpful. I'll focus on finishing some other features for the next release and pick this up as soon as I'll get to it! :)

Thank you for working in this !!

Didn't realize you are working on this too and in fact I have finished most of it including rotating elements, region of generation (XZBBox), elevation data. The rotation requires changes on many data structures not only the element coordinates so basing it on the map transformation architecture will be more organized, modular, and complete. Maybe you can go to my dev-xzpoly branch to see the implementation. There are further works needed to make rotation perfect like snapping to grid as mentioned in Issue #97. If you are interested we can work on those together and try to avoid repeated efforts.

Hi!
I've published PR #571 on how to apply rotation to world generation.
If you’re interested in rotation, you might find it useful!