Re: Performance in performer

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Sharon Clay (src++at++rose.asd.sgi.com)
Wed, 5 Jun 1996 10:52:02 -0700

+>---- On Jun 5, 12:07pm, DreamTeam Ltd. wrote:
> Subject: Performance in performer
->We are developing a real-time rendrer application using Performer 2.0
->
->At this time we are running it on an Impact Maximum and the performance
->is good - not great (I was expecting better !). We have done all the
->necessary optimization in the scene (Culling,etc.).

The most common reason I've seen for less than expected performance
is unexpected texture swapping. Have you verified with the Performer
graphics state stats that you are not swapping textures?
Performer 2.0 had a bug that aggravated this problem: our 1 and 2 component
textures used 12 bits for the 1st component which causes very inefficient
memory usage on IMPACT. The work around for this is to not rely on
the internal format default but to set it directly with the GL token to
pfTexFormat(tex, PFTEX_INTERNAL_FORMAT, GL_INTENSITY8_EXT).

Maybe one of our IMPACT experts will respond with more.

->
->My understanding is that Performer "performes" the best on an Onyx
->RE2 machine. I also heard somewhere that there is work being done
->to optimize the code especially for the Impact machines.

That might be only becuase RE2 has been out so long.
Performer2.0 has many IMPACT-specific tunes in it already and we are
further improving the product for this platform with help from their team.
We are happy to hear about and help with your tuning process.

->Anybody knows anything about Inspector ??
->
->Will performer be able to display NURBS ever ??

Inspector will be initially built on top of Performer and will geared
for visualization of large CAD models in interactive applications.
Inspector handles the issues of efficient and proper display of surfaces,
including NURBs, with simplification for LOD, and much much more....

->
->Too many question - ah ???

We appreciate your interest!

src.

-- 
-----{-----{---++at++   -----{----{---++at++   -----{----{---++at++   -----{----{---++at++
Sharon Rose Clay (Fischler) - Silicon Graphics, Advanced Systems Dev.
src++at++sgi.com  (415) 933 - 1002  FAX: (415) 965 - 2658  MS 8U-590
-----{-----{---++at++   -----{----{---++at++   -----{----{---++at++   -----{----{---++at++


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