interactive car rig

[julius]

Ok,

I'm trying to make an interactive car rig to learn a bit more rig/simulation, and I have two problems :

firstable, when I use a fixed constraint between two simple cubes, all is fine with default settings, but when I apply the same thing between the four little cubes you can see in the video, and the big one in the center, all is shivering... The only thing I found to solve it is to raise to 100 the substeps number in the physx dynamic operator. Is it normal ?

My second probem : I applied a hinge constaint between my wheels and my little cubes. The behavior of the wheels seems ok, but hinges are rolling all the time....
What's the problem ?

here is a little video to show you concretely :



thanks for your advices.

PS : thanks to moderator for editing the video ID

[julius]

Ok,

I experimented a bit more, and it seems that shakes appears only when there is a significant difference between the respective sizes of the objects.
If volumes are approximately the same, there is no problem anymore...

any idea please ?

[julius]

Ok, so it seems that simulation specialists are not on si-community ;)

I try a last question as I didn't succeed on driving a specific rotation axis of an active rigid body. Is it possible ?

Thanks

[xsisupport]

Did you see this article on andynicholas.com ? Building A Car Rig

[julius]

Thank you, I've seen it, but my goal is to build a rig able to do things like that :



That's not the case of the Nicholas's one.

[olivier jeannel]

What are you using for your RBDs simulation ?
I'm making a falling car (a simple one) kind of "ragdoll" with Momentum and it's working good enough atm.

[julius]

I'm using native RBDs simulation tools, not ICE.

[olivier jeannel]

Did you manage to get somehing working ?

[julius]

No, I didn't find any solution to constraint the simulated wheels orientation during the simulation.

Maybe ICE is the solution, but I'm a total beginner with it.