If the former then Bullet might not be accurate enough, since it is a rigid body simulation and accurate nut on bolt physics, especially when tightened, would probably require some flex. Yes, Bullet has "soft-body physics" but I doubt it is up to the task. I'm not sure about that. Perhaps you could scale and tune the physics simulation to give decent non-real-time results, but it would require blood sweat and knowledge.
If the latter, then yes I believe it could be done. You could "fake" it with a custom Action. The btActionInterface is an interface with a pure virtual method called updateAction(). You could derive NutBoltAction from that interface, and implement the method to keep track of the nut and bolt interaction. When you add your Action to the simulation then Bullet will call its updateAction() every substep. Alternatively, if you know how to write the Jacobian of the threaded behavior you could to write your own custom constraint.Statistics: Posted by drleviathan — Thu Oct 22, 2020 3:01 pm
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