triangles / quads follow-up 2004-02-10 - By Neto
Back
Videocards from the jurassic age used to support non-triangulated quads, but
their support was quickly dropped because rendering quads requires a bit
more "IFs" than triangles, since quads cannot always be rendered with a
single, generic algorithm (one needs to find out if the quads are concave or
convex, and act accordling).
I *think* the latest videocard to support quads was the NEC PowerVR2 (the
PVR1 supported quads, with sure). The PVR series cards are made around the
infinite planes concept, where it calculates a plane for a given polygon,
and only renders a portion of it (that can be either inside a triangle or a
quad). Maybe the voodoo2 also supported quads.
But if you hope making a scene in 3DS MAX, exporting it to Shockwave3D, and
have it running faster in a quad-based videocard, forget it. Those cards are
so old I'm not even sure Shockwave3D will work with them.
-- ------ Original Message -- -----
From: dir3d-l@(protected)
To: "dir3d-l@(protected)" <dir3d-l@(protected)>
Cc: rodrigo.rubilar@(protected)
Subject: [Dir3d-l] triangles / quads follow-up
Date: 10/02/04 13:01
Hi again,
To follow up my earlier question about traingles and quads,
Are there any 3D graphic processors that handle quads (i.e without
triangulating the quads)?
Are there any 3D graphic renderers that prefer quads?
Kind regards,
Thomas
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