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(3alleg), POLYTYPE_ATEX(3alleg), ex3d(3alleg)