polytype_ptex(3alleg4) php man page | unix.com

POLYTYPE_PTEX(3alleg4)						  Allegro manual					    POLYTYPE_PTEX(3alleg4)

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  map-
       ping 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(3alleg4), POLYTYPE_ATEX(3alleg4), ex3d(3alleg4)

Allegro 							   version 4.4.2					    POLYTYPE_PTEX(3alleg4)