Insiemistic Operations on shapes

I’m looking for some code that implements insiemistic operations on shapes (given by triangles meshes or poligons meshes),
like sum, subtraction, intersection
but i have really no idea about where search.
someone have hints for me?
thanks in advance.

This is called CSG. The wikipedia page has some links to C++ libraries: … d_geometry

I don’t know if there are any python bindings.

I should mention that CSG is very hard to get right. There are libraries that do it, though.