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Man Pages


Manual Reference Pages  -  POLYTYPE_PTEX (3)

NAME

POLYTYPE_PTEX - Polygon rendering mode type Allegro game programming library.

CONTENTS

Synopsis
Description
See Also

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)
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Allegro POLYTYPE_PTEX (3) version 4.4.2

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