Witch joint to allow the 3 rotations with limits ?

[greg2fs]

Hello I need a joint like a ball and socket allowing a cone limit and for the fird rotation a stop alpha.
Does this joint exists or how can I build one ?
Thanks

[JoeWright]

It doesn't exist yet and is really hard to build. Its on Julio's list of things to do I hope.

As a temporary measure you may have luck fudging it with multiple hinge joints.

Joe

[greg2fs]

ok then I must use an intermediate body, right ?

[JoeWright]

Yes, that's what I've done for the moment. Works quite well for me, hopefully you can find an interpretation that works for you. I used small masses for my intermediate bodies.

Joe

[greg2fs]

OK, I have done that. Is it possible to add resistance (damping) inside a joint ?

[JoeWright]

Yes... I can't remember the functions right now. Something like NewtonSetMinimumRowFriction and the maximum counterpart

[greg2fs]

It seems to be only for userjoints. Maybe I can add a torque proportionnal to the angular speed between the 2 bodies linked by a joint to have the same effect ?

[JoeWright]

Use the custom joint version of the hinge rather than the older built in version.

[greg2fs]

It's a harder work I use to use custom joints only for special thing I think to make a hinge with custom joint I suppose I'll have to store the original relative orientation and position between the two bodies, calculate the rotation errors etc... Is that correct ?

[JoeWright]

Just use Julio's code in the custom joint folder. Also, I did make a post about this joint somewhere where I talked about limits and motorised versions. Perhaps look at my profile for my list of posts.

[greg2fs]

Yes I saw these classes, right now I'll try to keep the classic hinge joint.
Thanks