Re: [Torcs-devel] Force feedback integration : need help about physics

[Christos D. <ole...@fa...>]

Annick et Jean-Philippe wrote:
> Hi, all.
> 
> Currently working on force feedback integration in Torcs,
> I am very close to the moment when I'm able to inject some effects
> into my wheel.
> 

Since we already use the Pacejka formula, adding the aligning force is
trivial.  I hope that it works correctly.

I guess I can export a couple of variables in some structure..
How about
struct SteeringFeedback {
	float align; // magnitude of the horizontal force
	float bump; // magnitude of the vertical force
	float bump_frequency; // in case the force updates are too slow
};

Now, there bumps may be a bit tricky.  The simulation's dt is currently
0.002 if I remember correctly.  I think that the control feedback is set
to 0.01, though I could be wrong.  In that case, you wouldn't need a
bump_frequency, just a magnitude for the vertical forces and then how
that is handled would depend on the actual feedback wheel used.

Are there any other forces that you'd feel on the wheel?

I think I'll add the structure in interfaces/car.h and
add it to the tPrivCar structure.

How's that?