Metaball objects and more primitives.

It would be very useful to have more primitive objects as metaballs, such as Torus, Cone and Pyramid. Not only primitives but also the possibility to convert a closed mesh into a metaball.

I know that it's easy to talk, but I did some research and this guys explains how to do this mathematically, with steps and examples. It may be of help to someone trying to code this feature.

mshgrid.com/2020/02/03/implementing-your-own-metaballs-and-meta-objects/

mshgrid.com/2021/01/17/aabb-tree/

iquilezles.org/articles/distfunctions/

mshgrid.com/2021/02/07/computing-the-sign-of-discrete-distance-fields/

Thanks!