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POLYTYPE_GRGB(3)                Allegro manual                POLYTYPE_GRGB(3)

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)

Allegro                          version 4.4.2                POLYTYPE_GRGB(3)