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Steering Animation Jittery?


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#1 happyloaf

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Posted Jan 31 2021 - 04:11 PM

Sometimes after a lap or two when I go over bumps, my drivers animation gets a bit "jittery" with the wheel moving left and right rapidly even though I'm steering straight ahead. I'm using a G29 on 540 deg. of rotation. Any idea how to fix this?

#2 Alekhine

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Posted Feb 01 2021 - 11:25 AM

Hi,

I have a G25 and sometimes, on Monza for example, I have quite violent shocks in the force feedback, in a straight line, without explanation ...

#3 Cookie

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Posted Feb 01 2021 - 01:08 PM

Have you ever read about FFB2 patch?

Petteri made it and I never want to miss it.
Following his readme gives the only acceptable FFB in GPL.

http://srmz.net/inde...226

#4 happyloaf

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Posted Feb 01 2021 - 06:20 PM

I think the FFB2 patch is installed for me. I have it clicked in the mod lis tin GEM+.

I think the FFB2 patch is installed for me. I have it clicked in the mod list in GEM+ which makes me think it is installed and working.

#5 Cookie

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Posted Feb 01 2021 - 08:03 PM

Isn't the G29 the one with the way too high forces?
We have threads here about people having problems

What are your settings in GEM - controler?

#6 kunc

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Posted Feb 02 2021 - 06:28 PM

I've seen the "jittery" wheel animation for years.
I've always assumed it corresponded to FFB.  Having never used a FFB wheel, I've never been able to confirm that theory.
If it's something that can be turned off, I'd love to know how as it doesn't seem realistic.

Edited by kunc, Feb 03 2021 - 03:58 PM.


#7 jgf

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Posted Feb 03 2021 - 02:39 AM

I've read, ages ago, this is a dirty signal of insufficient duration and/or amplitude to be felt in the wheel but does register in the graphics.  The proposed solution was a slight change to an RC network to change the time constant so the spurious signal was ignored;  in audio terms, a "click/pop" filter.

I suspect this may to a degree be system dependent;  I experienced these jitters on my first FF wheel, at times much more pronounced than mere jitters, but same wheel on a new system never had the problem.

#8 Cookie

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Posted Feb 03 2021 - 08:32 AM

Or it simply is caused by the big Logitech FFB dead zone - also thema in serveral threads here.

I have a G27 and I am used to have this "jittery" in very long "curved" straights e.g. the long Waldgerade to the Ostkurve at Hockenheim.

Once you know what causes this you forget it.
It is in the logi firmware and imo it is less in linux than in windoze.

So you should look for the strength of the FFB in the controls and use maybe a higher value...

#9 kunc

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Posted Feb 03 2021 - 08:56 AM

Was FFB part of the original GPL release, or is it an official update or unofficial mod?
I don't recall any wheels that supported FFB in 1998, and there is no mention of "Force Feedback or FFB" in the official support documents ("Grand Prix Legends" and "Grand Prix Legends - Four-Wheel Drift").

#10 Cookie

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Posted Feb 03 2021 - 09:05 AM

FFB came afair in the official update 1.2

#11 dbell84

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Posted Feb 03 2021 - 09:27 AM

Does this only happen with Logitech wheels? I’ve never had this happen with my Thrustmaster wheel.

#12 rcb

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Posted Feb 03 2021 - 09:34 AM

It happens with my Fanatec CSW even if I turn ffb off in the core.ini.  It's more of a graphical annoyance because it doesn't seem to affect the cars tracking or behavior.

I think some posters are misunderstanding the problem.  This is not jitters in the physical force feedback that you can feel.  This is jitters in the on screen wheel animation while you are pointed straight.

Edited by rcb, Feb 03 2021 - 09:44 AM.


#13 Cookie

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Posted Feb 03 2021 - 09:46 AM

Maybe I am mixing the optical and the tactile jitter effect

I am talking about the tactile feeling in the wheel wich maybe is visible when you have the wheel shown in game - I don't...

#14 rcb

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Posted Feb 03 2021 - 10:00 AM

I found an quick example here at 00:41, 00:53, and 01:20.   It's more like a quick spasm of the wheel.  https://www.youtube....h?v=IlMDXX8WGVo

#15 paul skingley

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Posted Feb 03 2021 - 10:07 AM

I am not sure if this is the same effect you describe but when I had a G25 I had to hold the wheel on straights or it would start an oscillation. Unattended it would get quite severe.

I now have a T300 which does not have the problem, maybe because it is belt driven.


Paul

#16 Tobodestroyer2020

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Posted Feb 03 2021 - 11:59 AM

View PostCookie, on Feb 01 2021 - 01:08 PM, said:

Have you ever read about FFB2 patch?

Petteri made it and I never want to miss it.
Following his readme gives the only acceptable FFB in GPL.

http://srmz.net/inde...226

Ffb2 or Ffb3 ?

#17 jgf

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Posted Feb 03 2021 - 12:47 PM

FWIW, FFB was implemented in GPL from the start, though not activated in the release til the patch.  There were few FFB wheels in '98, but consensus among gamers, and manufacturers of other wheels, was the effects were "gimicky" and not realistic (probably more a fault with the few games/sims which featured it than with the wheels themselves).  Interestingly the Thomas wheel has never offered FFB.

#18 Cookie

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Posted Feb 03 2021 - 04:58 PM

View PostTobodestroyer2020, on Feb 03 2021 - 11:59 AM, said:

Ffb2 or Ffb3 ?

I prefer FFB2 as it is not as harsh as 3, but test it yourself, Fleurke uses afaik 3

View Postjgf, on Feb 03 2021 - 12:47 PM, said:

FWIW, FFB was implemented in GPL from the start, though not activated in the release til the patch.  There were few FFB wheels in '98, but consensus among gamers, and manufacturers of other wheels, was the effects were "gimicky" and not realistic (probably more a fault with the few games/sims which featured it than with the wheels themselves).  Interestingly the Thomas wheel has never offered FFB.

You are right as long as you look at those strange settings of latency and damping people use.

Petteri did remove all effects not produced by physics and gave us ffb2 and ffb3(beta!)

#19 GPLaps

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Posted Feb 04 2021 - 08:13 AM

I believe this jittery animation is basically the onscreen wheel reacting to the force feedback. I dont think there would be a way to get rid of it without removing force feedback all together.

#20 happyloaf

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Posted Feb 04 2021 - 05:40 PM

I just turned off the wheel finally. It feels "odd" since I normally drive with a wheel on (it's a preference thing and I know most turn the wheel off in sims).




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