rec.autos.simulators

by **Ruud van Ga** » Sat, 04 Aug 2001 20:58:14

Good thing. :) Actually, all these links are better probably but I've
got too many suspensions to simulate I think. I want more gameplay in
at the moment, and add physics tweaks on the side.
Still, a novel (well) idea I have is to give some engineering info on
a setup, so to display for example (in a report or something) the
amount of damper damping (over/underdamped) to help in setting up a
bit realistically.

Ruud van Gaal, GPL Rank +53.25
Pencil art : http://www.racesimcentral.net/
Free car sim : http://www.racesimcentral.net/

by **Ruud van Ga** » Sat, 04 Aug 2001 21:38:46

On Thu, 2 Aug 2001 20:36:13 +0200, "Sbastien Tixier"

>> On Thu, 2 Aug 2001 17:41:13 +0200, "Sbastien Tixier"

>> Weird, skid sounds are not always on here. What sound card do you
>> have? Even then, I believe you can see the skidfactors on the left,
>> and when added up they set a skid volume from 0..1.

>I just check, i have skidding sound even with 0 skidfactors.

If you're still around, make sure in debug.ini your
friction_circle_method=3. Otherwise, skid factors are not calculated
right (not calculated at all). And as it doesn't get set in the ctor,
it's random, thus either no sound or some sound or whatever!
Bug will be fixed in v0.4.8.

Ruud van Gaal, GPL Rank +53.25
Pencil art : http://www.marketgraph.nl/gallery/
Free car sim : http://www.marketgraph.nl/gallery/racer/

by **Johann Dene** » Mon, 06 Aug 2001 21:52:23

> On Thu, 2 Aug 2001 17:41:13 +0200, "Sbastien Tixier"

>>Do you plan to make a replay ? have consider to record driver actions or
>>cars position/rotation ?

> Yes, replays are very important, just to review the great moments, and
> for a ghost car too. I'll record car positions, since the system is so
> complex that I'd rather just store the pos/rot variables. Esp. if you
> change the car physics a bit (like inertia values), your replays would
> become unusable if you just stored driver inputs.

On the other side, using user input could ease the debugging process.
Users would send their replay, instead of describing as accurately as
they can (which is often not much).
Another advantage is that you can write an analyser using the same
simulation engine and a saved set of inputs.

Why not using both methods ? saving states at regular intervals would be
ideal to allow replays to be consistent over evolutions of the sim
engine. For performance analysis and debugging, the input method is the
best IMO.

--
Johann Deneux
Kart simulator:
http://www.esil.univ-mrs.fr/~jdeneux/projects/top10/

by **Ruud van Ga** » Tue, 07 Aug 2001 20:37:22

Haven't heard of bugs that aren't already blatantly obvious and are on
my tasklists already, and the bugs that may be in there are so subtle
that's it's hard to feel that it's a bug (i.e. perhaps a '-' sign in
the differential code for example).

That's true, although those graphs sweeping up & down indicating how
far you pressed the throttle never seemed to make sense to me. Not
without a visual feedback like in GPL Replay Analyser where you SEE
where you lose time, and then want to see if there was any difference
in throttle/brake pedal position for example. I'll consider it,
perhaps indeed as an option, so you can exclude it and save space,
which is a biggy for replays.

Ruud van Gaal, GPL Rank +53.25
Pencil art : http://www.marketgraph.nl/gallery/
Free car sim : http://www.marketgraph.nl/gallery/racer/

by **Ashley McConnel** » Tue, 07 Aug 2001 18:47:00

It reminded me of Homer :) -

Toe goes in.....Toe goes out
Toe goes in.....Toe goes out
Toe goes in.....Toe goes out
Toe goes in.....Toe goes out
Toe goes in.....Toe goes out

:)

Ash

| Wow, vehicle aerobics :).
|
| Yes, that should be it.
|
| -Gregor
|
| >
| > you mean like this?
| >
| > toe in toe out
| >
| > / ---- \ \ ---- /
| > | |
| > | |
| > | |
| > |--------| |--------|
| >
| > --
| > Gunnar
| > #31 SUCKS#015 Tupperware MC#002 DoD#0x1B DoDRT#003 DoD:CT#4,8 Kibo:
2
| > myk, trygg og god.

by **J. Todd Wass** » Thu, 09 Aug 2001 12:35:58

Possibly, but for the most part, there's either McPherson strut or A-arms on
the cars simmers will be interested in. Aside from solid axles, of course.

An online engineer is a great idea for helping folks with setups. Tough to
do though, but it'd be helpful. For dampening, you could calculate critical
dampening and show that rate, or a range around it.
Todd Wasson
---
Performance Simulations
Drag Racing and Top Speed Prediction
Software
http://PerformanceSimulations.Com

rec.autos.simulators

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