What is "clipping" and how can I tell if it's happening?

[2is2006]

So I keep reading this reference to "clipping" when discussing FFB and I'm not exactly sure what it is, I just know it's something you don't want... So, what is it and how can I tell if it's happening to me? I'm using a G27 if that matters.

[2is2006]

Gotcha, so if you have FFB settings cranked so high that simply driving around the track is causing your wheel to use 100% of it's force, you won't feel stuff like going over curbs, etc etc.

So yeah, now the question is how to tell if it's happening in PCars. Hopefully someone has that answer for us.

[Manwith Noname]

Clipping is when a signal is too great to fit within the scale of it's measurement.

If we think about the signal that is sent to your wheel, that the electronics and motors can turn into movement that you feel as a representation of what your car is doing. Imagine it on a scale of 0-100.

0 = No force being generated by the game, the minimum signal.
100 = The maximum force the game can generate, full signal.

When the game generates this signal based on all the possible forces it's programmed to generate, if the sum of these forces produces a number that results in 100.1% signal generation or more, you are clipping.

When this happens, any subtle differences that might tell you something about the handling of the car are lost, there is nowhere for the signal to go in terms of sending more signal. It can also happen that because there is so much signal being generated, any subtle reduction from one of the forces cannot be felt either.

You can see this in pCars by cycling through your HUD layouts when driving. Once you have the screen filled with expanding circles (these represent each tyres grip level) and a few bars up top (these represent your pedals), there's a box in the upper left that should have a squigly line in it. If this line ever hits the top of the box, the games FFB output signal is clipping and you are losing information.

It's worth noting that bouncing against the line briefly (fraction of a second in my opinion) is not so much an issue, it's good to have things scaled so you make use of the full range but if it is ever pinned for an extended time something needs to be changed in the settings.

It is also possible to clip the signal after the game has sent it to your wheel in the driver software, this will cause hardware clipping but presents itself slightly differently and unless you have gained your wheels driver settings up should not be occuring.

[rudski]

The telemetry screen shows a graph of the FFB output, if it flat lines at the top or bottom then you are clipping
Turn on telemetry data and you should then see the clipping tool.

[2is2006]

I got it, thanks guys

[Wolke]

Which "green" line ? The FFB output line is yellow :D
And don't turn your FFB strength down, if your clipping try to reduce TIREFORCE or increase both softclippin values. Depends on wheel what feels best.

[Manwith Noname]

mr munkee の投稿を引用：

Hmm, no matter what I set my FFB to, that green line doesn't change. It's not based on the in game FFB. I turn my FFB from 90 to 50 and the green line is exactly the same for both, but my FFB is weaker. So what am I suppose to change? And what does the FFB setting in the car setup option mean exactly?

As mentioned above, tyre force and soft clipping values will yield better results. Your experiment does suggest that the overall force setting is simply a gain setting that is calculated after all the other forces have been added together and is not reflected in the graph. Which would also imply it will not reduce clipping as the signal is already clipped when it takes hold.

To make life easier on you, here's a couple of threads that might provide some insight into the problems with FFB since the 1.4 patch and will offer settings to get you in the ball park.

http://forum.projectcarsgame.com/showthread.php?33699-Temporary-solution-for-FFB-BUG-Logitech-DFGT-%28possibly-G25-G27-too%29

http://forum.projectcarsgame.com/showthread.php?33710-Temporary-solution-for-FFB-BUG-Thrustmaster-TX-458-%28may-work-for-T500-T300%29