Re: Why is OpenGL Perfly so slow?
Rob Jenkins (robj++at++barney.reading.sgi.com)
Thu, 7 Mar 1996 16:36:05 +0000
On Mar 7, 7:31am, David H. Whittington wrote:
> Subject: Why is OpenGL Perfly so slow?
> I tried building an OpenGL version of perfly under
> Performer 2.0 and when displaying a model of an aircraft with
> approximately 5000 polygons, I found that the draw time was
> about 100 msec when under perfly gl mode, it took about 25 msec
> on a Crimson. I realize that the OpenGL version is intended for
> Impact and Infinite Reality but is it(OpenGL) so slow that I
> cannot consider using the same code for the older machines.
> Just why is it 5 times slower? It would make sense if it were
> 20-50% slower perhaps.
>
>-- End of excerpt from David H. Whittington
Dave
Is this a Crimson VGX ? if so OpenGL on VGX has some features implemented in
software ( including some or all texturing I believe ). Please post my detail
on you HW and I'm sure we could comment further.
Cheers
Rob
--
________________________________________________________________
Rob Jenkins, Software Support Group, Silicon Graphics UK Ltd.
Forum 1, Station Road, Theale, Reading, UK, RG7 4SB.
tel 01734 257736, fax 01734 257553, email robj++at++reading.sgi.com,
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on Mon Aug 10 1998 - 17:52:31 PDT