Hello. I can't create and attach wheels to the car body. To start I used code from tutorial. In init game I created an actor and then put this code:

Wheel::Param wp; // wheel parameters
wheel[0].create(car,Matrix().setPos(Vec( 1,-0.5, 1.5)),wp); // left -front

and draw meshes on actors matrixes. But wheel aren't show (with Physics.draw on too).

When I delete this : .setPos(Vec( 1,-0.5, 1.5)) I saw only mesh. Wheel still didn't attach to mesh. What's wrong with this?

if the tutorial works, then you must have something wrong in your codes, you need to analyze them

Ok. I repair the problem. And i've got question - is it possible to use actor from .obj file as car base? When I try to do this my code find good actor but wheels are made in another place (again Vec(0)).

check if Wheel::create () requires matrix in local or world space

Ok I fixed this. Thanks a lot.