I want to build a sphere. OOPS IT TURNED OUT AS A CUBE.
We live in uncertain, cuboid times. Sometimes, that's just the way it is. For everything else, there's my new shape generator!
The example instance will allow you to generate some shapes right away, but really, I've only begun to add shapes. I intend to add tori and parabolas within a few days, and may decide to add other shapes based on feedback.
You can also (look at|fork|submit patches for) the source code, most of which is on the hosted version but more of which can be found at the git repository (the repo links appear to be broken right now, but you can easily download snapshots).
Thanks for your feedback in advance, and happy hacking (in minetest and on the code).