PolygonThis module provides basic functions for any concave, convex and convex regular polygon (Does not handle complex polygon and polygon with holes)
PolyhedronThe module for the polyhedron manipulation. We use the term "polyhedron" to define a set of linear constraint. Each constraint defines a half-plan. A polyhedron is then determined by the intersections of all the half-plans formed by its constaint. It differs from polygons which represent finite enveloppes (For example, convex polygons are a particular cases of polyhedra, which can be infinite).