Re: Networked Performer

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Angus Henderson (angus++at++death.reading.sgi.com)
Fri, 1 Dec 1995 17:25:37 +0000

On Nov 30, 11:52pm, Mahmoud M.Rashad Halfawy wrote:
> Subject: Re: Networked Performer
> Thanks for the helpful information about networked performer. But if we need
to
> communicate more that XYZ/HPR (e.g. a moving object) between the two
> applications, should we use DIS?
>

If you need a lot of data shared between platforms at at low latency you need
some type of shared memory card, such as SCRAMNet or a VMIC shared memory
board.
You can still use ethernet for lots of data but you can quickly run into
latency problems ( delays & lost data )

I could fit an eyepoint, some switches & about 20 moving models into
an ethernet packet.

Years ago I lifted the UDP broadcast code from Rob Mace's Arena demo - the
parent of Megan, I mean Mekton. I always use a dedicated ethrnet and one
directional transfers. In a 60Hz genlocked visual you really can't see the
join. Last time I tried it was between a three pipe & two deskside onyxes all
of which were blended together using a SEOS Prodas Display. In fact once I'd
genlocked them once I could turn off the genlock and it still worked.

ANGus

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