Search found 7 matches

by jochemspek
Mon Dec 03, 2018 10:43 am
Forum: PyBullet Support and Feedback
Topic: generic 6DOF constraint in pyBullet
Replies: 2
Views: 659

Re: generic 6DOF constraint in pyBullet

My goal is to create accurate and fast drop simulations of arbitrary mechanically complex assemblies of rigid objects like this bracelet consisting of 43 interlocking parts. https://postimg.cc/Jsxd0M1j) In order to do proper physical simulation I had to split the shells or segments of the model(s) i...
by jochemspek
Thu Nov 29, 2018 11:29 pm
Forum: PyBullet Support and Feedback
Topic: generic 6DOF constraint in pyBullet
Replies: 2
Views: 659

generic 6DOF constraint in pyBullet

Hi, I'm looking for a way to create (or emulate) a btGeneric6DofConstraint with user constraints in pybullet but i'm struggling to see how to do this. I thought I was brave by trying to add a generic constraint type in pyBullet, but that's too deep a rabbithole for me. The reason I need the btGeneri...
by jochemspek
Mon Feb 05, 2018 5:31 am
Forum: General Bullet Physics Support and Feedback
Topic: rigid bodies violently jumping away
Replies: 7
Views: 1697

Re: rigid bodies violently jumping away

Thank you your kind reply. The problem is that this simulation is to perform in an automated process where human-designed but random assemblies are put through a physics simulation, so it's impossible to fit the correct collision shapes by hand. Fortunately, I have made some progress. The (at least ...
by jochemspek
Fri Feb 02, 2018 8:24 am
Forum: General Bullet Physics Support and Feedback
Topic: rigid bodies violently jumping away
Replies: 7
Views: 1697

Re: rigid bodies violently jumping away

@erwin couwmans, I see that in pybullet, there is only support for concave geometry in static objects. This unfortunately does not apply to my need to simulate the 'pin in hole' simulation that I describe in my original post. From the pybullet examples i understand that the only way to get concave g...
by jochemspek
Thu Feb 01, 2018 6:13 pm
Forum: General Bullet Physics Support and Feedback
Topic: rigid bodies violently jumping away
Replies: 7
Views: 1697

Re: rigid bodies violently jumping away

Please file a very simple PyBullet repro case and use the github issue tracker . Keep it simple, no Blender, just plain PyBullet. Also check out the PyBullet Quickstart Guide and examples and try to understand why the PyBullet examples work fine and your setup doesn't. I'll have a look tomorrow, th...
by jochemspek
Thu Feb 01, 2018 6:13 pm
Forum: General Bullet Physics Support and Feedback
Topic: rigid bodies violently jumping away
Replies: 7
Views: 1697

Re: rigid bodies violently jumping away

Your blender_pathology github repository appears to be empty. Maybe you forgot to push to it? You have two rigid bodies connected by a constraint? If so, it looks like the constraint is unstable. I have a few theories about how it could get that way but I wouldn't want to speculate very far without...
by jochemspek
Thu Feb 01, 2018 3:07 pm
Forum: General Bullet Physics Support and Feedback
Topic: rigid bodies violently jumping away
Replies: 7
Views: 1697

rigid bodies violently jumping away

https://i.stack.imgur.com/7vc9m.gif I'm having some issues with simulating certain rigid bodies using bullet physics in the python blender module. I've tried doing the same thing in c++ bullet, and pybullet, with the same results. The above gif illustrates what happens. I've gone through every fix/...