Re: Problem: pf2.2 + Onyx2 + Layers

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Mattias.Johansson++at++saab.se
Tue, 10 Mar 1998 15:24:26 +0100


EXT AVS; Sharon Clay wrote:
>
> +>---- On Mar 9, 12:06pm, Rob Jenkins wrote:
> > Subject: Re: Problem: pf2.2 + Onyx2 + Layers
>
> ->> ->
> ->> ->Running the same database on these two platforms gives dramatically
> ->different
> ->> ->coplanar rendering results? Here we go again ... (hi sharon ;-)
> ->> ->
> ->> ->If you're using displacement, make sure you have a 23 bit depth buffer on
> ->the
> ->> ->Onyx2. there have been problems where you don't get the FB you ask for ...
> ->see

I seem to be getting what i ask for (unless pfGetPWinFBConfig is broken
:-) )..
23 bit depth buffer, that is.

We are using displacement, stencil is not an option.

> ->>
> ->> Wait! This may not be necessary - first make sure you have patch 2919 or
> ->> later as there was a fix in that patch that could affect precision of
> ->> Z coordinates. Using 23 bits of Z means slower multisampled fill so you
> ->
> ->patch 2919 is a 'DG SCSI RAID 2.3 Rollup' patch, not known for it's
>
> Woops! I typoed :-( I meant the old Onyx2 iR patch 2191 (or a more recent
> replacement).
>
> ->The latest iR patches currently released are:
> ->
> ->2327 for Onyx ( replaced 1808 ) and
> ->2789 for Onyx2 ( replaced 2326 )

We have the latest patch, 2789 installed.

Adjusting far/near clip did not seem to improve the result at all ??
Adding a little offset (0.01 meters) to the subfaces seems
to do the trick though. Why? I'm a little bit confused about that.

BTW, anyone else who has problems with a crashing graphics subsystem on
Onyx2's ??

/Mattias
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