First of all, sorry if it's a repost. I can't seem to find my original post.
I'm trying to find a way to extract touching surfaces from two bodies that have contact between each other. I realized the definition of the problem in topological terms is not easy especially considering rounding up/tolerance of boolean functions.
I guess the problem might be known to users who do mechanical simulation. I presume that steps would be some sort of conversion , meshing and then using unspecified nx tool that directly or indirectly can give me the surfaces that have a contact condition.