Simon Ubsdell covers a lot of techniques to create procedural collision in Black Magic Design Fusion.

A new tutorial from Simon Ubsdell shows how to make a procedural collision effect within BMD Fusion. The tutorial covers many techniques, including expressions to make glowing spheres bounce within a box. 

Ubsdell shows how to build the collision effect, the glowing self-illuminated spheres, the perspex box, and much more. You can get the asset files for this tutorial here.