QuantumCabbage

npetit
20.5.672 has a fix

That's an upcoming one, I guess, since the current daily is .669? Alright, I'll give it a try with your recommended version and hopefully that'll solve the problem. Thanks!

Hey all,
so I'm currently working on several shots with CG cars, and since some of them are driving on gravel roads, I thought this would lend itself quite ideally to using the RBD Car Rig in earnest. However, I'm struggling with the path following. Especially with the way the speed is being calculated. In the attached image, you can see that the path is perfectly straight with only the slightest changes in elevation, however, the car just crawls along for the first bit, then all of a sudden it goes like the clappers until it loses control by overbreaking towards the end. I've tried diving into the SOP, but I couldn't make heads or tails from that spider web of cross-dependencies and invoke nodes that do some kind of black magic. The scene is set up in 20.5.370, I've tried newer releases, too, but to no avail. I would be really grateful for any and all help on the topic because I'm quite stumped.

Thanks and cheers!

Not sure if I understand this correctly, but what prevents you from attaching a child object to the object that contains the world transforms and then applying the recoil to the child object's local transforms? That way, you don't have to grapple with the world transforms at all.
If that can't be avoided, I would try and extract the world transforms as a matrix. If you invert this matrix and apply it, the object should snap back to the origin. Then you apply the recoil, and afterwards apply the world transform matrix (non-inverted) to get the object back to its original position. I'm not CHOPs literate enough to provide you with a step-by-step solution off the top of my head, but that's how I would try and tackle the problem.