As I replied to janmatys, rigacar v2 is almost released… and I tried to take this into account in this version.
V2 is stable (only documentation is missing) :
The generated rig has 3 layers :
- a deformation layer to animate the model
- a mechanical layer to make the link between the deformation layer and the animation layer
- an animation layer for the bones available to the animators
If you generate a rig with version 2, you can make visible the 15th layer of the armature. This layer contains the main mechanical bones : one for the body (MCH-Body), one for each wheel (by the way v2 supports more than 4 wheels) and one for each disk brakes (new in version 2).
You can use these bones to parent your own extension over the base armature.
For instance, if you want to add bones to control a steering wheel, you can parent the hierarchy of bones to MCH-Body.