rec.autos.simulators

by **Don Clawso** » Wed, 15 May 1996 04:00:00

Can anyone tell how I can improve my latency while using Hawaii? I am
usually around .3 most of the time. Is this poor? If so, does anyone
have any ideas on how I can improve this. I currently connect at 9600
baud even though I have a 28.8 modem.

Thank you in advance for any help.

Don C - on Hawaii

by **Eric T. Busc** » Wed, 15 May 1996 04:00:00

> Can anyone tell how I can improve my latency while using Hawaii? I am
> usually around .3 most of the time. Is this poor? If so, does anyone
> have any ideas on how I can improve this. I currently connect at 9600
> baud even though I have a 28.8 modem.

At .3 it is nearly impossible to race without causing major trouble for
other racers. It is no fault of your own (probably just poor phone lines)
but please don't use Hawaii with this high of a latency. It is because of
this that I see cars jumping back and forth from side to side making passes
and close racing impossible. A car can move a very large distance in .3
seconds (especially at Talladega at speeds of 200 mph). I have been
driving side by side with a car making a low pass, when out of nowhere he
basically jumps and appears right on top of me. Please don't take this
personally, but if you can't get your latencies down to at least .15 or
lower don't race.

--

Emory University Graduate School of Arts & Sciences
Nascar Setups Page: http://userwww.service.emory.edu/~ebusch/
Hawaii Network UserName: Buschwick (6) and dropping fast =(

by **Bill Cranst** » Wed, 15 May 1996 04:00:00

Hi Eric. Isn't it your own latencies that determine what you see? If
his latencies are in the 0.3 neighbourhood, then wouldn't the cars he
sees on the track be jumping all around, not what you see? If your
latencies are low, then shouldn't you be able to see his car without
it jumping all over the place? I usually get latencies anywhere from
10 to 0.13, calling from Ottawa, Ontario, Can., and the only time
I've seen warping is when it affects a bunch of cars. This I think is
referred to as the warp bug that affects a race more than just a
particular driver.

Bill.

by **Eric T. Busc** » Wed, 15 May 1996 04:00:00

> Hi Eric. Isn't it your own latencies that determine what you see? If
> his latencies are in the 0.3 neighbourhood, then wouldn't the cars he
> sees on the track be jumping all around, not what you see? If your
> latencies are low, then shouldn't you be able to see his car without
> it jumping all over the place? I usually get latencies anywhere from
> 10 to 0.13, calling from Ottawa, Ontario, Can., and the only time
> I've seen warping is when it affects a bunch of cars. This I think is
> referred to as the warp bug that affects a race more than just a
> particular driver.

It would seem like that would be the case, but it does look as if it
effects the other drivers as well. Basically at any given point in
time, his car would have a .3 sec buffer where it could appear on my
screen. Because of his latency, I have no way of knowing exactly where
on the track he is. His joystick (or wheel) inputs would not
immediately show up to other drivers, potentially causing major problems
when making a close pass. I'm sure I'm not the only one who has seen
cars quickly shift from one lane to another on the track.

Ed or someone who knows more about Hawaii correct me if I'm wrong on
this.

--

Emory University Graduate School of Arts & Sciences
Nascar Setups Page: http://userwww.service.emory.edu/~ebusch/
Hawaii Network UserName: Buschwick (6)

by **Gregory Fu** » Fri, 17 May 1996 04:00:00

My guess is that the hawaii client has to tell the server where the car is,
and if that only happens every .3s, the server only sees periodic jumpy
movements. SO the entire field is affected when looking at this particular
car.

Gregory Fung

Vancouver, B.C., Canada

IICC3 Ground Effects/Rebel Alliance Lola-Ford-Firestone

by **David Spark** » Fri, 17 May 1996 04:00:00

>Hi Eric. Isn't it your own latencies that determine what you see? If
>his latencies are in the 0.3 neighbourhood, then wouldn't the cars he
>sees on the track be jumping all around, not what you see? If your
>latencies are low, then shouldn't you be able to see his car without
>it jumping all over the place?

I don't think this is always the case. I've seen single cars warp where I
was getting low latencies (0.11). It's particularly bad at Talladega, where
mysterious crashes occur fairly frequently. I assume that the local program
just extrapolates a new position for the car based on the last known
position, velocity and acceleration when it fails to see data for a certain
car during a frame interval. If the car is headed up the banking at the
time, it just continues up into the wall, whereas the driver may have
actually made a correction. I've seen this continues for several frames
until the car smacks the wall, then suddenly the car will appear perfectly
intact several hundred feet down the track.

Dave "davids"
Sequoia Motorsports

by **Robert Huggi** » Sat, 18 May 1996 04:00:00

>My guess is that the hawaii client has to tell the server...

Last night, I was running a 10% dega race, running up front with
someone named "million". A great driver. I qualified first, but it
was clear that he had the stronger car. I kept seeing him in my rear
view jumping left and then right. The "latency jitter", not the
Earnhardt move. Even the sound kept jumping around like the server
was not sure where he was or where I was. After the race, I was
curious as to why he took so long to pass me and what his latency was.
We were both on a .11 latency. He said that I was jumping around and
he could not pass for fear of which of the blurred images was really
me.

Does this mean some other player was in that race with a high latency?
Why else would two drivers with a .11 latency suffer the "latency
jitter"?

.11 + .11 + server delay = "latency jitter" ????

How low of a latency delay can you get?

Will an ISDN connection help?
Does Hawaii support ISDN connections.... YET....?
--
Best Wishes!!!
Robert Huggins
Raleigh, NC

by **Eric T. Busc** » Sat, 18 May 1996 04:00:00

> How low of a latency delay can you get?

The lowest I've seen is .08 sec.

It shouldn't matter and I doubt Papyrus will support it, as ISDN would
do little to help the latency problem. ISND's main benefit would be
that of increased bandwidth, which is not at a premium as a 9600 baud
connection will suffice. Perhaps the ISDN would give you access to
higher quality lines on route to Boston which could lower latency, but I
doubt by very much. But, if you already are getting .11 sec that your
phone lines are pretty good anyway.

--

Emory University Graduate School of Arts & Sciences
Nascar Setups Page: http://userwww.service.emory.edu/~ebusch/
Hawaii Network UserName: Buschwick (6)

rec.autos.simulators

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