Re: Anti-Aliassing on O2

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Rémi Arnaud (remi++at++remi.engr.sgi.com)
Thu, 26 Jun 1997 19:00:32 -0700 (PDT)

Dave Pearce wrote:
>
> Hi all!
>
> I'm pretty new to performer, (i.e. have only been using it for a couple
> of weeks), and am having difficulty getting anti-alliasing modes working
> on the O2. I've tried setting attributes in GeoStates and the
> pfAntialias() functions, but with no joy.
>
> Can anyone tell me the simple solution to this problem (I'm aware that
> the O2 only has limited Antialiassing capability)?
>

 The only antialiasing available on O2 and Impacts is on lines, not on
 polygons. So it is a little more complex to get an antialiased image
 than turning on pfAntialias(), you will have to set a draw callback
 for every geoset, that will draw the geoset in antiliased line mode
 after it has been done in polygon mode. This works very well, but
 as some caveat due that texture MipMaping does not work the
 same way on lines than on polygons.

 It would be a very good Performer exercise though.

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