remove a constraint for certain condition

[sebateau22]

Hi!

I have a hinge constraint between two bodies A and B. I'd like to remove it when X of body A is greater than 0.

XA= FirstRigidBody->getCenterOfMassPosition().getX();
if(XA>0){


}

what should i put between the brackets of the if?

Thanks

[marios]

just store somewhere pointer to that constraint you want to delete, and than between brackets:

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dynamicsWorld->removeConstraint(constraint_ptr);

or better, you can use

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FirstRigidBody->getConstraintRef(index)

but you must know constraint index (if you have only one constraint connected to FirstRigidBody it should be 0)

[sebateau22]

dynamicsWorld->removeConstraint(constraint_ptr);

this is what i did before posting the message but it does not work. In my case, i have to compute a robot arm throwing a ball. The ball should be fixed to the arm till the position of the ball reaches x=0. Then the arm releases the ball. But, checking the position of the ball it oscillates with the arm around 0 (the arm has a 6dofspringconstraint with equilibrium point at x=0 explaining why i said the ball oscillates with the arm).

FirstRigidBody->getConstraintRef(index)

Using that, the program just crashes. I tried with index 0 1 2 3 4 5 but the program crashes when the ball reaches the condition...

Any other suggestion?