Search found 17 matches

by maiklof
Sat Mar 09, 2019 12:42 pm
Forum: PyBullet Support and Feedback
Topic: Moving from Bullet 2 to Pybullet
Replies: 5
Views: 1290

Re: Moving from Bullet 2 to Pybullet

Hi Erwin, Right now I would prefer to use Python to interface the physics engine. If we see any performance issue we could move to C++. I think it is great to have the option to run the physics server in another computer, so I guess shared memory/C++ is not an option... - Motion States: A method tha...
by maiklof
Thu Mar 07, 2019 8:49 am
Forum: PyBullet Support and Feedback
Topic: Moving from Bullet 2 to Pybullet
Replies: 5
Views: 1290

Re: Moving from Bullet 2 to Pybullet

Hi Erwin! I have been using pybullet for some days now and I would like to start implementing the plugins we discussed above: - Motion states. - Collision filters for ray tests. - Using Custom materials. Can you help me to get started? Any document that explains how to introduce new plugins? Thanks ...
by maiklof
Sat Oct 06, 2018 7:23 pm
Forum: PyBullet Support and Feedback
Topic: Moving from Bullet 2 to Pybullet
Replies: 5
Views: 1290

Re: Moving from Bullet 2 to Pybullet

Thanks for your answer Erwin! I will definitely give pybullet a try and see if I can learn how to program a plugin. Do you have any documentation or should I check the source code and figure it out? As I wrote, I will be happy to contribute or help if possible. I leave the link to my old project (I ...
by maiklof
Thu Oct 04, 2018 10:18 pm
Forum: PyBullet Support and Feedback
Topic: Moving from Bullet 2 to Pybullet
Replies: 5
Views: 1290

Moving from Bullet 2 to Pybullet

Hi everyone! First of all, I want to thank you for the great job you are doing with the Bullet Physics library! I have been using Bullet 2 for many years now, but mostly in python, thanks to a wrapper I found on the internet and I have been maintaining and developing further. Now I am considering mo...
by maiklof
Thu Oct 29, 2015 8:27 pm
Forum: General Bullet Physics Support and Feedback
Topic: Ghost objects and constraints
Replies: 0
Views: 2080

Ghost objects and constraints

Hi, I have a working simulation environment where I have some rigid bodies (static and dynamic) and some ghost objects (PairCaching). The idea is that the ghost objects are used to detect some of the dynamic objects (like sensors) but without colliding (Flag->NO_CONTACT_RESPONSE). To complicate the ...
by maiklof
Wed Apr 29, 2015 7:38 am
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Mirror real robot using Bullet
Replies: 2
Views: 2482

Re: Mirror real robot using Bullet

Thanks for your reply Basroil! Could you share your knowledge and the approach with me? Do you have any paper I could read? My research is not related to be able to mirror the robot itself, but this is something could help me to achieve my primary goal. Your results are really impressive, but I can ...
by maiklof
Tue Apr 28, 2015 7:29 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Mirror real robot using Bullet
Replies: 2
Views: 2482

Mirror real robot using Bullet

Hi, I want to try to mirror the movements of a real robot for a research project. The idea is to get the rotation of each axis from the real robot controller via Ethernet, create a virtual robot using Bullet, and try to make the Bullet robot move "exactly" the same, or at least follow as close as po...
by maiklof
Tue Oct 07, 2014 7:45 pm
Forum: General Bullet Physics Support and Feedback
Topic: Problems with CustomMaterialcombinerCallback
Replies: 2
Views: 2503

Re: Problems with CustomMaterialcombinerCallback

I have still these open issues, can somebody help me please?
NOTE: Curiously if I using "Dantzig" solver it works well, so, is it a bug in the default solver?
by maiklof
Wed Sep 24, 2014 5:16 am
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

I´ve tried to setLinearVelocity() before each world step, but it does not fix it... I think that been able to make surfaces behave as conveyor belts can be a nice feature, for both static and dynamic objects, and it would be nice to be able to do it just calling one method... But I think I have to c...
by maiklof
Mon Sep 22, 2014 8:27 pm
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

Summary: From r2534 to r2335 a change was made to 'improve handling of restitution by using the velocity (linear/angular) before applying forces: this is done by re-introducing the btSolverBody and only apply the forces to solver body, and use the original rigid body velocity for restitution computa...
by maiklof
Mon Sep 22, 2014 6:36 pm
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

Ok, now I know it is something that happened between r2534 and r2535... There are around 15 modified files, but I will try to find the one causing the issue...
by maiklof
Mon Sep 22, 2014 4:00 pm
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

Thanks again Basroil!
I have never used GIT, but what you say makes sense and seems easy, so I will try it. I will update the post if I find what caused the issue...
by maiklof
Sat Sep 20, 2014 12:52 pm
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

Hi Basroil, Yes, as I said, it works in 2.79 but not in 2.81 and 2.82... Any idea where in the code this can be implemented... Still the question is if the feature has been removed or is just a bug... I've tried to find out by myself, but as you said, there are too many changes and the code is not c...
by maiklof
Thu Sep 18, 2014 4:57 am
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

No Basroil, there are several post about it:
http://bulletphysics.org/Bullet/phpBB3/ ... 05&start=0
http://bulletphysics.org/Bullet/phpBB3/ ... 441#p21441

I've been doing it using the friction direction an a contact Callback, but I wanted to try this too...
Thanks!
by maiklof
Wed Sep 17, 2014 6:47 am
Forum: General Bullet Physics Support and Feedback
Topic: setLinearVelocity and Static objects
Replies: 12
Views: 4050

Re: setLinearVelocity and Static objects

Hi again,
I've been testing with older versions and it seems to work in version 2.79, but not in 2.81. I would like to know if it has been removed (if is so, why?) or is just a bug.