Blender geometry nodes - Mesh collision, no physics (3.2 alpha)
100% geometry nodes.
There's no gravity involved, only two rotating meshes that's positioned to always touch without overlapping.
This and other videos were originally put on YT to be shared with a very limited audience. But since there seems to be some interest from a few others. Here's a some QAs.
Q: Will you make a tutorial for this?
A: No, too lazy and most of the material is already covered elsewhere in a better format than what I could provide..
Q: Can I have the blend file:
A: Maybe, most of them are really messy. It's probably better to have a discussion about key methods.
Q: Can I steal this idea?
A: Go ahead. Most things have already been done by others, so it's not like I could claim the right to the idea even if I want to.