From: Allan Schaffer (allan++at++sgi.com)
Date: 03/01/2000 23:39:16
On Mar 2, 9:09am, A. Toygar Abak wrote:
> As we want to implement a real time application for training 4 people
> using HMD at the same time on a team work, we need to render 4 different
> scenes (8 images because we need stereo).
>
> The thing I'd like to learn is it is theorically possible to use one
> pipe (with DG5-8) for rendering 4 different scenes (Of course according
> to resolution and complexity of scenes one pipe and/or even 4 raster
> managers can not be enough). I think that I can send these 8 images to
> the different locations in the frame buffer and than I can take any part
> of the frame buffer and send it to a channel I want, is this true?
Right. Multi-channel operation with unique viewpoints in each
channel is a core capability of Performer and InfiniteReality and is
very (very) easy to set up.
A good reference to help you get a feel for this is the IRIS
Performer Getting Started Guide, Chapter 5 in particular. But
feel free to browse..
http://www.sgi.com/software/performer/manuals.html
Click "Getting Started Guide", then "Part two (Programming)"
and down to Chapter 5.
> When I try to calculate the pipes and raster managers I need can I use
> following method.
[...]
I'd echo Don's earlier suggestion that sizing the system is best done
with your SE's help, they might be able to offer other clever
suggestions such as the D-PLEX option in case a 2nd pipe becomes
necessary. The peak numbers quoted are quite reliable but rendering
rates can also be influenced by database or application
characteristics and other factors such as texture downloads, so it's
difficult to make an absolute judgment without knowing more about how
you plan to set up your application. The SE you're working with
should be able to make the call.
Allan
-- Allan Schaffer allan++at++sgi.com Silicon Graphics http://reality.sgi.com/allan
This archive was generated by hypermail 2b29 : Wed Mar 01 2000 - 23:39:20 PST