POLYTYPE_FLAT - Polygon rendering mode type Allegro game programming
library.
#include <allegro.h>
#define POLYTYPE_FLAT
A simple flat shaded polygon, taking the color from the `c' value of
the first vertex. This polygon type is affected by the drawing_mode()
function, so it can be used to render XOR or translucent polygons.
polygon3d(3alleg), drawing_mode(3alleg), ex3d(3alleg), excamera(3alleg)