Vlib and Alib
-------------

This directory basically contains the modules Alib and Vlib.

Alib is a 2-D graphic library with support for z-buffer drawing. It is based on
the GUI module which in turn is the abstract window graphic module supporting
both X-Window and MS Windows.

Vlib is the higher-level abstraction layer that collects all the 3-D routines
that draw over a Viewport: lines, polygons, etc. Vlib routines are based on the
Alib library and its z-buffer, and some functions are simply a wrapper to this
latter.
