From: Tom Flynn (flynnt++at++engr.sgi.com)
Date: 12/13/2002 13:37:52
On Fri, 13 Dec 2002, Marcin Romaszewicz wrote:
>
> Multisampling is such a huge performance hit on nVidia cards that
> performer does not enable the feature automatically. To enable it:
>
> export PF_ENABLE_MULTISAMPLE_VISUAL=1
Doing this tells performer to look for and grab a multisample visual is
one is available. This would allow you to toggle anti-aliasing on and
off.
if you enable anti-aliasing by setting the GL environment variables, AA
will just be on all the time. the disappointing fact is that if you're
comparing to IR, both NVidia and ATI's AA techniques don't look all that
great. if you're a gamer and have never seen real AA before, then the
scene should look less aliased.
try enabling the performer environment variable and bring up a model or
scene in perfly, put it in wireframe and look real close at some lines.
toggle AA on and off and watch the lines go from thin and jaggy to thick
and fuzzy :-)
-tom
>
> -- Marcin
>
> On Thu, 12 Dec 2002, Rob Body wrote:
>
> > Hi All,
> >
> > I have an application that works fine on an ONYX RE2 but when ported to run
> > under RedHat 7.2 Linux with a Gainward GeForce 4 card and Performer 2.5.1
> > doesn't work.
> >
> > In my Openflight terrain model I have set up a flood light to illuminate
> > some polygons and on the ONYX the effect is perfect. When I view the same
> > scene on the PC the floodlighting doesn't appear at all. Does anyone know
> > why this is happening. The light is being read in and added to the geometry
> > but the effect doesn't show up.
> >
> > Anti aliasing
> >
> > I have set the following up on the Geforce 4:
> >
> > export __GL_FSAA_MODE=4 (to give 4 x Bilinear multisampling)
> > export __GL_DEFAULT_LOG_ANISO=1
> > export __GL_SYNC_TO_VBLANK=1
> >
> > but the anti aliasing still doesn't come on. Any clues as to what I might
> > be doing wrong ?
> >
> > Thanks for your time.
> >
> > Rob
> >
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > Rob Body
> > Simulator Manager
> >
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> >
> > E-mail r.body++at++hrwallingford.co.uk <mailto:r.body++at++hrwallingford.co.uk>
> >
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