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POLYTYPE_PTEX(3)                Allegro manual                POLYTYPE_PTEX(3)

NAME
       POLYTYPE_PTEX - Polygon rendering mode type Allegro game programming
       library.

SYNOPSIS
       #include <allegro.h>

       #define POLYTYPE_PTEX

DESCRIPTION
       A perspective-correct texture mapped polygon. This uses the `z' value
       from the vertex structure as well as the u/v coordinates, so textures
       are displayed correctly regardless of the angle they are viewed from.
       Because it involves division calculations in the inner texture mapping
       loop, this mode is a lot slower than POLYTYPE_ATEX, and it uses
       floating point so it will be very slow on anything less than a Pentium
       (even with an FPU, a 486 can't overlap floating point division with
       other integer operations like the Pentium can).

SEE ALSO
       polygon3d(3), POLYTYPE_ATEX(3), ex3d(3)

Allegro                          version 4.4.2                POLYTYPE_PTEX(3)