Bug in cartire.cpp CARTIRE::PacejkaMz

[LBodnar]

Maybe it is intended? But I think you are right. It should be at least be similar to Fx, Fy. I'll push a fix.

It looks like a bug. At low angles Mz ~ B * D so if D ~ friction_coeff and B ~ 1/friction_coeff then friction_coeff is cancelled out and that is exactly how it feels. There was no difference in feel over grass or tarmac.

I think Sv should be scaled down as well. I.e. consider non-friction surface with friction_coeff = 0. I assume Mz should be zero rather then Sv.

Code:

Mz = friction_coeff * (D * ... + Sv);