GLE is a library package of C functions that draw extruded surfaces, including surfaces of revolution, sweeps, tubes, polycones, polycylinders and helicoids. Generically, the extruded surface is specified with a 2D polyline that is extruded along a 3D path. A local coordinate system allows for additional flexibility in the primitives drawn. Extrusions may be texture mapped in a variety of ways. The GLE library generates 3D triangle coordinates, lighting normal vectors and texture coordinates as output. GLE uses the GL or OpenGL API's to perform the actual rendering.
xml_pickle performs serialization to an XML format with several properties not possessed by the standard pickle module, namely, the format is human-readable, the format supports validation of stored serialized objects, and the format may be parsed, manipulated, and objects imported, by languages other than Python,