rec.autos.simulators

gpl force feedback

Greg Han

gpl force feedback

by Greg Han » Wed, 31 Jan 2001 22:12:16

How do you get force feedback to work in GPL?I have an act-labs ff wheel
Everything else works eccept I get no feedback effects.Thanks alot
Sébastien Tixie

gpl force feedback

by Sébastien Tixie » Wed, 31 Jan 2001 22:28:33

Hi,

You have to install GPL Patch 1.2, and then edit core.ini
change use_force_feedback = 0 par use_force_feedback = 1.

cheers,

Greg Hans a crit :

--
Seb
Game Developer
GPLRank -37.20
http://magicfr.multimania.com

Dave Henri

gpl force feedback

by Dave Henri » Wed, 31 Jan 2001 23:06:30

  In the message below Sebastien covered what you have to do.  Edit a file
called:  core.ini  in your main gpl folder.  You may have trouble finding it
if your windows explorer is not setup right.  Let us know if you need more
info...
and make sure you have that 1.2 patch.  www.papy.com will have it.
dave henrie

Rick Baumhaue

gpl force feedback

by Rick Baumhaue » Thu, 01 Feb 2001 01:45:36

It seems that, while Papy's site is being updated, there are no direct links
to the GPL files.

Use this direct link:

http://www.papy.com/gpl/download.html

Rick


>   In the message below Sebastien covered what you have to do.  Edit a file
> called:  core.ini  in your main gpl folder.  You may have trouble finding
it
> if your windows explorer is not setup right.  Let us know if you need more
> info...
> and make sure you have that 1.2 patch.  www.papy.com will have it.
> dave henrie


> > How do you get force feedback to work in GPL?I have an act-labs ff wheel
> > Everything else works eccept I get no feedback effects.Thanks alot

Ambulate

gpl force feedback

by Ambulate » Thu, 01 Feb 2001 09:24:07

In addition to the other advice you've been given you may want some pointers
on how to adjust the core.ini values for optimal control on your system.
Let me know and I'll repost my rather lengthy dissertation on this :-)

--
Chris "Ambulater" Lee
"Don't Bother Running.........You'll Just Die Tired."
Reviews at www.sim-arena.com


Ulrich Pechtol

gpl force feedback

by Ulrich Pechtol » Thu, 01 Feb 2001 17:34:33

| In addition to the other advice you've been given you may want some
pointers
| on how to adjust the core.ini values for optimal control on your system.
| Let me know and I'll repost my rather lengthy dissertation on this :-)
| --
| Chris "Ambulater" Lee

It would be very nice if you can give me some advice on that topic.
The settig of the FF-values for me seems to be a never ending story.
So please go ahead.

--
U. Pechtold
Drivin N3/N4 at http://www.virtual-oval.de home of GNC (German NASCAR
Championship)
Flyin 2 EDDS with FS98 :-)

Markus Gebhard

gpl force feedback

by Markus Gebhard » Thu, 01 Feb 2001 18:23:36


> It would be very nice if you can give me some advice on that topic.
> The settig of the FF-values for me seems to be a never ending story.
> So please go ahead.

> --
> U. Pechtold
> Drivin N3/N4 at http://www.virtual-oval.de home of GNC (German NASCAR
> Championship)
> Flyin 2 EDDS with FS98 :-)

Hi Uli,

short in german: Deine Signatur ist kaputt (nach den -- muss ein Leerzeichen
kommen) und wenn Du die Infos zu FF hast, poste sie doch auch im GNC-Forum.
Das waere klasse.
(now even shorter in english: Your sig's wrong and please inform GNC about
these settings. THX!)

Gruesse/regards
Markus

Ambulate

gpl force feedback

by Ambulate » Fri, 02 Feb 2001 08:05:50

GRAND PRIX LEGENDS AND FORCE FEEDBACK:  A PRIMER IN CORE.INI SETTINGS

I believe GPL core.ini FF settings are extremely specific to your wheel,
your machine, and even your car setups and driving style.  However, I also
believe that there is a logical approach you can to take to individualizing
your settings.  With a proper understanding of what these settings do you
can produce realistically subtle tactile feedback that will enhance your
driving ability.  To that end, let's take a look at each of the FF core.ini
settings, shed some light on what they do, and discuss some practical
approaches to setting them in a way that works for you and your setup.

LATENCY:
This is essentially how far into the future (in seconds) the GPL software
predicts what forces will be needed and sends them to your wheel, thereby
overcoming latency.  I determined the latency setting by driving over curbs
repeatedly and adjusting the value until all four wheels produced individual
FF effects in sync with what I was seeing from an outside view of the car.

MAX STEERING TORQUE:
This is an interesting one.  This is not actually the maximum torque your
wheel will produce, but is instead the *THRESHOLD* at which your wheel
produces it's maximum force.  Let's just pick some numbers out of the air to
illustrate the point.  Let's say the GPL software models the torque of
shifting at high revs at 50N, fish-tailing through a corner at 200N, and a
complete wipe out at 300N.  If you were to set your max steering torque
threshold at
"50"  all of these effects would be equally powerful as all would produce
the maximum amount of torque possible.  So if you set this threshold value
too low the car is virtually undrivable and there is little distinction
between the various forces.  If you set this threshold value too high (say
2000), you'll lose all steering torque altogether as no steering torque
force will ever reach the threshold necessary to trigger maximum effect.  In
this example, setting the value to 300 would allow you to feel a marked
gradation between these 3 very different effects.

So how do you set this for your system?  First set damping in both the
windows controller panel and the GPL core.ini to 0.  We don't want to mess
with damping right now.  From a dead stop turn your wheel to full left or
right lock, take your hands off the wheel, and then gradually accelerate.
If the front wheels (and steering wheel) do not center under forward
momentum and your car continues in a perpetual circle, then the threshold
value is too high.  If instead, the wheel suddenly snaps to center and or
see-saws ***ly, then you have the threshold set too low.  If the forward
momentum of the car very gradually brings the front wheels (and the steering
wheel) into forward alignment, as you would expect in a real world car with
manual steering, then you've got the threshold value just about right.
Adjusting the threshold to a level that just barely produces a centering
effect at low speeds will result in a very drivable car and nice subtle
tactile inputs that will cue you as to the status of your vehicle.  Now here
is the part that really throws people:  the Max Steering Torque threshold
*ONLY* affects *STEERING TORQUE FORCE* or the forces related to engine
torque, torque caused by maneuvering through corners, wheel centering
torque, etc.  It does *NOT* affect any of the forces related to crashing
into guardrails or driving on grass.  For some odd reason, known only to
Papyrus, these latter type of effects are only affected by the damping
setting.

DAMPING:
This, contrary to some reports, does in fact do what it says.  It causes
increased "friction" or "viscosity" in the movement of the wheel and
therefore also tends to lessen some FF spikes.  But here's where it gets a
bit strange.  You'll find that as you increase the damping value, and the
friction on the wheel, you also increase the forces felt when driving on
grass or slamming into rails.  I recommend adjusting this value just high
enough to barely feel a subtle difference between pavement and grass when
one single wheel drops off the road.  Using this as a guide, you'll be able
to tell with your eyes closed if all four wheels are on the road.  Hitting
curbs will feel realistic, guard rails will give you a jolt (but usually
allow you to correct), and the wheel will not be so tight that you begin to
lose torque effects.

The key to good driving and useful tactile information is subtlety in each
of these FF settings.  Remember, GPL is not an arcade game!

Finally, in the Windows controller panel, I personally have Force Effects
set at 100% and dampening effects to 0% (you've already adjusted dampening
in the GPL core.ini so adding more damping in the controller panel will just
result in reduced less subtle effects).  I like to use full linear steering
in GPL with a steering ratio of 15:1.   These latter two settings are purely
a matter of taste, but you should keep in mind that they may effect the way
you feel the forces at work in your wheel or at least the way your car
responds as torque is placed on the wheel.  Once you find a car setup that
suits your driving style you may want to tweak the core.ini FF settings to
match your setup.

Hope this helps.

--
Chris "Ambulater" Lee
"Don't Bother Running.........You'll Just Die Tired."
Reviews at www.sim-arena.com


rec.autos.simulators is a usenet newsgroup formed in December, 1993. As this group was always unmoderated there may be some spam or off topic articles included. Some links do point back to racesimcentral.net as we could not validate the original address. Please report any pages that you believe warrant deletion from this archive (include the link in your email). RaceSimCentral.net is in no way responsible and does not endorse any of the content herein.