Kangaroo Bipartite

[DanielPiker]

Ah indeed, I see what you mean. I may have been misremembering, it’s a while since I looked at these types of structures.

Here’s an example where a conical mesh does give a transformable structure that works on non flat meshes:

Deployable Structure Animation with Kangaroo 2

Kangaroo can be useful for creating the conical/circular meshes to use for these type of structures, but once you have that, the actual motion of the structure is better constructed purely geometrically. Here’s an old animation showing this from when I first found this linkage type. There is a point within each quad about which the panel can rotate and scale so that it stays touching the quad boundary. You can then invert this scaling so the panels keep their size and the structure as a whole e…

I thought I also remembered a way of using quad meshes with equal length and perpendicular diagonals to make some non-flat transformables, but I’d need to dig back a bit.