polytype_grgb(3) - Linux man page
Name
POLYTYPE_GRGB - Polygon rendering mode type Allegro game programming library.
Synopsis
#include <allegro.h>
#define POLYTYPE_GRGB
Description
A gouraud shaded polygon which interpolates RGB triplets rather than a single color. In
256-color modes this uses the global rgb_map table to convert the result to an 8-bit paletted color, so it must only be used after you have set up the RGB
mapping table! The colors for each vertex are taken from the 'c' value, which is interpreted as a 24-bit RGB triplet (0xFF0000 is red, 0x00FF00 is green, and
0x0000FF is blue).
See Also
polygon3d(3), rgb_map(3), ex3d(3)