Re: Difference between O-GL & Performer
Jason Williams (rock.csd.sgi.com!odin.corp.sgi.com!deliverator.sgi.com!uunet.uu.net!ds9!cerebus!Jason Williams)
Fri, 10 Jan 1997 13:27:48 -0500
On Jan 10, 9:51am, Brian Furtaw wrote:
> Subject: Re: Difference between O-GL & Performer
> Jim,
>
> Performer is a high level render library created and distributed by SGI.
> Performer runs on all SGI models and takes advantage of hardware and software
> features that are unique to each model. This gives you the best rendering
> performance across the entire SGI product line with one common api. So no
code
> changes between platforms, the performer libraries do all the work. Performer
> does its work using OpenGL.
>
> So to answer your question I would have to say it depends. For most cases
> Performer is going to run the fastest making the best possible utilization of
> the CPU and graphics pipeline. I imagine though their could be cases where
> Performer does not do the best job and an application written in OpenGL could
> do much better. I have not seen an example of this yet however.
>
> One thing to keep in mind is that Performer is not yet an Open standard it
only
> runs on SGI. OpenGL however runs on every platform, so if you want to
minimize
> porting between vendors platforms use OpenGL or Open Inventor which also has
> implementations on many other platforms.
>
Question, does anyone know the plans SGI has for Performer. Should we expect
to
see Performer go the same way that inventor has or is there going to be a new
product which will include the Performer API in it, such as the Cosmo products?
I would like to hear from the SGI people on this.
Jason Williams
Cambridge Research Associates.
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