rec.autos.simulators

Multiple monitor setup for GPL - any quirks?

Ruud van Ga

Multiple monitor setup for GPL - any quirks?

by Ruud van Ga » Fri, 09 Apr 2004 21:23:11

Hi all,

I'm thinking about how to implement using multiple PC's to render a
racing sim view.

I know GPL can do it using multiplayer network and tweaking the
camera's. Then you put for example 3 computers next to eachother and
play, the 2 slaves being viewers only.

However, for smooth network play, usually the car motion/rotation is
smoothed out. I would say that gives quite a difference for the center
view (unaltered) and the side views (multiplayer approximations of
what's going on in the center view).
Is that the case, in anybody's experience who's done multiple monitors
(with multiple PC's)?

For a quick hack, I want to do a 'send state of all objects' just
before the middle (master) computer renders a view, but that gives a
bit of lag (although the slave computers don't have to do physics, and
side views normally have less objects in view). Also this means you
have a dependency on framerate (the slaves will only render as fast as
the center computer).

Any ideas on tackling the issue are most welcome, as I'll muddle along
for now trying to send all state info.

Ruud van Gaal
Free car sim: http://www.racesimcentral.net/
Pencil art  : http://www.racesimcentral.net/

Tony Rickar

Multiple monitor setup for GPL - any quirks?

by Tony Rickar » Sat, 10 Apr 2004 02:48:50


> However, for smooth network play, usually the car motion/rotation is
> smoothed out. I would say that gives quite a difference for the center
> view (unaltered) and the side views (multiplayer approximations of
> what's going on in the center view).
> Is that the case, in anybody's experience who's done multiple monitors
> (with multiple PC's)?

Worked near perfectly. I used IPX for the local connections - I seem to
remember this worked better in terms of lag. There was a perfect line up
from the side views to the centre view as the AI outbrake you into the
parabolica :)

Certainly once on the move it seemed plenty accurate.

Cheers
Tony

Michael R Sisso

Multiple monitor setup for GPL - any quirks?

by Michael R Sisso » Sat, 10 Apr 2004 03:50:20




> > However, for smooth network play, usually the car motion/rotation is
> > smoothed out. I would say that gives quite a difference for the center
> > view (unaltered) and the side views (multiplayer approximations of
> > what's going on in the center view).
> > Is that the case, in anybody's experience who's done multiple monitors
> > (with multiple PC's)?

> Worked near perfectly. I used IPX for the local connections - I seem to
> remember this worked better in terms of lag. There was a perfect line up
> from the side views to the centre view as the AI outbrake you into the
> parabolica :)

> Certainly once on the move it seemed plenty accurate.

> Cheers
> Tony

I agree, use IPX over lan. If you take a look in core.ini you can see
the frequency of updates over LAN sends packets (larger packets as well)
faster than .. well fast.

You could set up TCP/IP to send as fast, I'd imagine, but I have never
tried that; IPX has always worked great.

I have not tried the 3 computer 3 monitor GPL setup yet, I am just
talking from 3 computer 3 wheel setup experience.

--
MRSisson

LOAD "GPL",8,1
RUN


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