Two-dimensional geometric objects available in OOG include: Curve, Lines (a collection of disjoint lines), QuadMesh (as its name implies, a quadrilateral mesh), Region (a sub-part of a QuadMesh), PolyMap (a two-dimensional layout of polygons, each with an associated color), CellArray (a two-dimensional array of rectangular cells, each with an associated color), and Animation2d (a specification of an animation, which includes initialization, calculation, and update functions). All of these objects are available in PyGist, but PyNarcisse supports only Curve objects in two dimensions (Narcisse is primarily a three and four dimensional plotting engine).
Animation2d objects are the subject of a separate chapter; See CHAPTER 6: "Animation2d Objects" on page 103.