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POLYTYPE_PTEX(3) Allegro manual POLYTYPE_PTEX(3)
POLYTYPE_PTEX - Polygon rendering mode type Allegro game programming
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).
polygon3d(3), POLYTYPE_ATEX(3), ex3d(3)
Allegro version 4.4.2 POLYTYPE_PTEX(3)