[solved] btHingeConstraint activation state

[Bigpet]

So, I have a little problem with btHingeConstraint. When I use set enableAngularMotor() or enableMotor() then the rigid bodys that the constraint connects move but after a while they get deactivated and only continue their motion after they get activated by either a collision or a call to activate().

here's a little demonstration of the effect. Just watch the beginning and the end to observe the effect:
http://www.youtube.com/watch?v=TiZh9v3BRNM

should I use some other type of constraint or do I just have to suck it up and add an Action that calls activate() on all rigid bodys in contraints that have active motors?

[Yann]

You can configure your rigid body to never deactivate by adding a flag like this:

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myRigidBody->setActivationState(DISABLE_DEACTIVATION);

Just do it on bodies when you activate the motors, and undo it when you deactivate the motors like this:

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myRigidBody->setActivationState(ACTIVE_TAG);

[Bigpet]

thanks, that worked alright, except that is has to be:

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myRigidBody->forceActivationState(ACTIVE_TAG);

otherwise the value won't change as long as DISABLE_DEACTIVATION is set.

[Yann]

otherwise the value won't change as long as DISABLE_DEACTIVATION is set.

I thought that was the point

[Bigpet]

what I mean was that

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myRigidBody->setActivationState(ACTIVE_TAG);

doesn't undo

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myRigidBody->setActivationState(DISABLE_DEACTIVATION);

but

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myRigidBody->forceActivationState(ACTIVE_TAG);

does