Search found 24 matches

by Dox
Fri Mar 15, 2019 5:47 pm
Forum: General Bullet Physics Support and Feedback
Topic: MultiBody and RigidBody: architectural design of an application
Replies: 4
Views: 776

Re: MultiBody and RigidBody: architectural design of an application

Hello, ok, I found some MultiBodyConstraint (Fixed and Slider) that allow to use the btRigidBody as parameter. I tried a FixedMultiBodyConstraint and I can see 2 problems. One lead to a question that I wanted to do sometime ago. I would like to focus on this. I often need to connect a btRigidBody A ...
by Dox
Fri Mar 15, 2019 10:29 am
Forum: General Bullet Physics Support and Feedback
Topic: MultiBody and RigidBody: architectural design of an application
Replies: 4
Views: 776

Re: MultiBody and RigidBody: architectural design of an application

Hello Erwin, Can you tell me some more details about constraint between btMultiBody and btRigidBody? For example, assuming I have (in true, I already have :D) a btRigidBody and a btMultiBody, can I use a 6dofconstraint to attach them? A typedConstraint take 2 btRigidBody as parameter. In case of btM...
by Dox
Wed Mar 13, 2019 11:23 am
Forum: General Bullet Physics Support and Feedback
Topic: MultiBody and RigidBody: architectural design of an application
Replies: 4
Views: 776

MultiBody and RigidBody: architectural design of an application

Hello, This is a general question in order to approach the development of an application using MultiBody and/or RigidBody. Think to a vehicle and some different articulated actuators (excavator, shovel, etc...). I would like be able to model the vehicle physic and then add the actuators to this one,...
by Dox
Mon Mar 11, 2019 2:24 pm
Forum: General Bullet Physics Support and Feedback
Topic: Multibody: apply force and torque in a given position
Replies: 0
Views: 289

Multibody: apply force and torque in a given position

Hello,

I'm looking at MultiBody API. I see addBaseForce and addBaseTorque. There is no vector to specify the position like the applyForce of RigidBody.

There is a way?

Many thanks, bye
by Dox
Mon Mar 11, 2019 12:07 pm
Forum: General Bullet Physics Support and Feedback
Topic: Attaching MultiBody to a PhyRigidBody: it is possible?
Replies: 0
Views: 295

Attaching MultiBody to a PhyRigidBody: it is possible?

Hello,

Simple question, I think complicate answer: can I attach a MultiBody base to a RigidBody with a joint (like hinge or 6dof or other)?

... And, if is not possibile, can I attach, at runtime, the bases of two different multibody?

Many thanks,

Bye
by Dox
Mon Feb 18, 2019 10:51 am
Forum: General Bullet Physics Support and Feedback
Topic: btMultiBodyJointMotor interaction and control problem.
Replies: 3
Views: 639

Re: btMultiBodyJointMotor interaction and control problem.

Hello Erwin, ok. So, do you think this is a bug and not a parameters tweaks? I would kindly request if you can suggest to me some ideas about joint stabilization described here: https://pybullet.org/Bullet/phpBB3/viewtopic.php?f=9&t=12610 As son as possible I'll open the bugtrack on multibody. Many ...
by Dox
Mon Feb 18, 2019 10:49 am
Forum: General Bullet Physics Support and Feedback
Topic: Stabilize joints between PhyRigidBody under multiple forces.
Replies: 0
Views: 277

Stabilize joints between PhyRigidBody under multiple forces.

Hello, I would ask some suggestions/ideas in order to stabilize motorized joint between PhyRigidBody. I try to describe my situation: I have a complex scene in terms of 3D objects, shaders and environment (underwater scenario). I have an underwater vehicle which has 6 forces applied (6 different mot...
by Dox
Fri Feb 15, 2019 6:11 pm
Forum: General Bullet Physics Support and Feedback
Topic: btMultiBodyJointMotor interaction and control problem.
Replies: 3
Views: 639

btMultiBodyJointMotor interaction and control problem.

Hello, I'm playing around MultiBody in order to overcome a constraint stability problem for a robotic arm chain in my framework. I wrote a simple urdf file (at the end of this message) loaded by the standard urdf multibody example. There are 3 links. The blue link is the fixed base, then we have a w...