wheel colliders and sliding cars

Unity Engine
1

I made a driving game with wheel colliders:

http://www.mechabit.co.uk/unity/werecow.html

all models and stuff are place holders

The questions are why does the car slide around even when stationary and why does the car veer to the side when driving straight.

I’ve searched the forum for answers and it appears that the veering problem is common and has no solution without using hacky methods to freeze rotation. The wheels and model are perfectly balanced and even happens on a simple box on flat terrain.

The car also slides down gentle slopes even when I apply huge brake torque and set the wheel friction really high.

Am I doing something wrong?

2

Doesnt veer to the right for me, what do you need to do to recreate that behaviour? As for sliding around at slow speeds thats due to undescribed behaviour when velocities get close to 0 when calculating slip ratios, ie something divided by something very very small gives a slipratio that causes unwanted forces, you wont get rid of that without doing your own tyremodel and solving the problem of low speed ratios.
Chris

3

Thanks for replying.
The veering is very slight and noticeable when driving long distances.

I guess I’ll have to add extra forces at low speeds or something.