Real-Time Physics Simulation Forum

However, this still returns both the torque applied by the motor and other values, I think that corresponds to the hinge constraint itself

OK, I figured out that I actually need to instanciate the feedback and pass it to my constraint:

Actually, getJointFeedback returns always NULL, even when calling enableFeedback(true) on the hinge
Do I need to do something more?

Hello,

When using Hinge constraint and enableAngularMotor, how can I know the torque that is applied by the motor?
Looks like getAppliedImpulse() is not what I want (for example, it returns non-0 values even if the motor is disabled)

Thank you
Gregwar

Hello, Here is a strange example: https://www.youtube.com/watch?v=jtXR9TKTbtI Do you have any idea what can cause this? Why is my body sliding on the ground? The ground is a box and the robot collisions are pure shapes (as shown in the video). How is it possible? Is there parameters I can tune to av...

Hello, I am currently working on simulations using voxels to generate inertia tensors, com & mass What i'm currently doing is giving the center of mass of my part to bullet using default motion state and giving it ixx, iyy and izz using the sum of all voxels (i.e ixx is the sum of (y*y+z*z)*m) W...

OK, but what does this number mean? theoretically speaking max parallel force <= mu (that number) * perpendicular force. If you press down with 1N of force and the combined mu is 0.5, the maximum friction force will be 1N. Bullet friction is a bit off the theoretical mark due to approximations, but...

OK, but what does this number mean?

Hello, In btRigidBodyConstructionInfo, we can specify a m_friction for objects. The only help in the doc is here: http://bulletphysics.org/Bullet/BulletFull/structbtRigidBody_1_1btRigidBodyConstructionInfo.html#a096d36f8308c4ca9b225d7c7ad43a0bf "best simulation results when friction is non-zero...

Hello,

From btConeTwistConstraint.cpp:

if (m_swingSpan1 >= btScalar(0.05f))

Looks like using ConeTwistConstraint for smallest angles have no effects, why?
I would like to be able to simulate such small constraints, how should I do?

Hello,

How can I get the motor related impulse of a btHingeConstraint?
It seems that getAppliedImpulse returns impulses even when disabling the motor

Thanks