Re: Anti-Aliasing on an O2.

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Sat, 7 Dec 1996 12:41:30 +0000

We've run the IMPACT Rapier fire trainer on O2 and
everything just works, including the line antialiasing.

I posted a bunch of stuff a while back on how this is
implemented including some code, althouh you might have
to add copying of geostates to the original post.

I've heard some talk of using the ICE chip on O2 for
this. The idea is to render to a high res pbuffer then
filter to a smaller display window using the new chip.
This should provide better quality (equiv' to accumulation
& jitter without the multiple geometry overhead) than line
antialiasing, (also RE & iR multisample) but you'd take a
major fill performance penalty. I don't expect the filtering
with image copy will be too big a hit on O2 it'll be the
overhead for brute force AA fill so you may be better off
sticking to AA lines.

Cheers,
Angus.

On Dec 2, 5:38pm, Steve Baker wrote:
> Subject: Anti-Aliasing on an O2.
>
> Has anyone out there played with faking anti-aliasing
> (S-L-O-W-L-Y) on an O2 using either polygons outlined
> with anti-aliased lines, or rendering with jittered
> screen soordinates in multiple passes?
>
> Does it work?
>
> Are there any slick tricks in Performer to make this
> easy?
>
> Thanks y_o4':nz{_)9"om
>
>
>
> Steve Baker 817-619-1361 (Vox-Lab)
> Hughes Training Inc. 817-619-8776 (Vox-Office/Vox-Mail)
> 2200 Arlington Downs Road 817-619-4028 (Fax)
> Arlington, Texas. TX 76005-6171 Steve++at++MrEd.bgm.link.com (eMail)
> http://www.hti.com (external) http://MrEd.bgm.link.com/staff/steve
(intranet)
> http://web2.airmail.net/sjbaker1
    (external)
>
>
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>-- End of excerpt from Steve Baker

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