POLYTYPE_PTEX man page on DragonFly

POLYTYPE_PTEX man page on DragonFly

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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	float‐
       ing 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)

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