angular motor of btHingeConstraint

[Gickl]

Hey,

i am using btHingeConstraints for wheels of a differential drive. you are able to control the velocity during runtime. to set the velocity i use

constraint->enableAngularMotor(true, velocity, impulse);

everything works and the velocities are set correctly. but only if the initial velocity is not zero and if you don't set the velocity to zero during runtime.
when the velocity is zero once the motor doesn't start to rotate again no matter what velocity you set...
i tried several other ways but it doesn't work.

can someone help me please? i don't know why the motor isn't able to start out of rest and i don't know what i can do to change that...
i'd be very happy if someone could solve this problem!

Daniel

[Erwin Coumans]

You object is likely put asleep, and you have to manually wake it up.

You can use body->activate();

Please let us know if that works for you.
Thanks,
Erwin

[Gickl]

we also found out that the problem occurs because of the deactivation of the rigid bodies. so now it's working!