Search found 21 matches

by bullet_team
Fri Feb 21, 2020 9:05 pm
Forum: PyBullet Support and Feedback
Topic: How to set joint origin when using pb.createMultiBody()
Replies: 1
Views: 1065

Re: How to set joint origin when using pb.createMultiBody()

You can use linkPositions and linkOrientations for this. The naming is confusing, it is the joint origin/orientation with respect to the parent.
(usually the 'link frame' adds the rotation of its own joint, if any)
by bullet_team
Fri Feb 21, 2020 9:01 pm
Forum: PyBullet Support and Feedback
Topic: Hollow shapes
Replies: 5
Views: 3558

Re: Hollow shapes

It can be 1 obj file that has multiple convex parts. That's how the vhacd util works.

See for example this file:
https://github.com/bulletphysics/bullet ... CD_CHs.obj

Each convex object is marked with 'o'
by bullet_team
Fri Feb 21, 2020 8:59 pm
Forum: PyBullet Support and Feedback
Topic: Model keeps swinging back and forth and is not fixed to the ground
Replies: 5
Views: 2058

Re: Model keeps swinging back and forth and is not fixed to the ground

You should fix the base, using the 'useFixedBase=True' option in pybullet.loadURDF Alternatively, set the mass of the first (base) link to zero. See also the PyBullet quickstart guide for more info in general. https://docs.google.com/document/d/10sXEhzFRSnvFcl3XxNGhnD4N2SedqwdAvK3dsihxVUA/edit#headi...
by bullet_team
Fri Feb 21, 2020 8:57 pm
Forum: Release Announcements
Topic: PyBullet and Bullet 2.89 with FEM deformables, PyBullet deep_mimic and Laikago
Replies: 0
Views: 4968

PyBullet and Bullet 2.89 with FEM deformables, PyBullet deep_mimic and Laikago

Note we are making regular Pybullet releases but don't make announcements here every time. You can see the PyBullet release history here . Bullet 2.89 includes a new implementation of volumetric deformable objects and cloth based on the Finite Element Method, thanks to Xuchen Han. Two-way coupling b...
by bullet_team
Mon Dec 31, 2018 9:14 pm
Forum: Release Announcements
Topic: Bullet Physics SDK 2.88 and PyBullet
Replies: 0
Views: 7205

Bullet Physics SDK 2.88 and PyBullet

A lot of work this year went into improving PyBullet for robotics and reinforcement learning research. The SDK was used in several published research papers by Google Brain Robotics , including our RSS 2018 paper "Sim-to-Real: Learning Agile Locomotion For Quadruped Robots" , see the [video here](ht...
by bullet_team
Sat Oct 08, 2016 2:31 am
Forum: Release Announcements
Topic: Bullet 2.85 released: pybullet, VR, inverse dynamics, IK
Replies: 0
Views: 9682

Bullet 2.85 released: pybullet, VR, inverse dynamics, IK

You can download the Bullet 2.85 release from github here: https://github.com/bulletphysics/bullet3/releases Note this release was previously called 2.84, but due to serialization/version mismatch, it has been bumped up to 2.85. Updated documentation will be added soon, as well as possible show-stop...
by bullet_team
Mon May 04, 2015 6:38 am
Forum: Release Announcements
Topic: Bullet 2.83 released on github: Example Browser, URDF
Replies: 8
Views: 60502

Bullet 2.83 released on github: Example Browser, URDF

You can download the Bullet 2.83 release from github here: https://github.com/bulletphysics/bullet3/releases See the docs/BulletQuickstart.pdf guide as part of the SDK download. Some of the features include: A new example browser, based on OpenGL 3+. It is still work-in-progress and not all demos ha...
by bullet_team
Sat May 17, 2014 10:12 pm
Forum: Release Announcements
Topic: Preparing Bullet 2.83 and 3.x at github, clone and test!
Replies: 2
Views: 22057

Preparing Bullet 2.83 and 3.x at github, clone and test!

The Bullet Physics SDK source code repository is now located at github: http://github.com/bulletphysics/bullet3 I am preparing an initial Bullet 2.83 version from that repo, please clone and test the code and discuss in this forum if there are serious issues. You can clone using either git or subver...
by bullet_team
Thu Oct 24, 2013 3:15 am
Forum: Release Announcements
Topic: Bullet 2.82 released: Featherstone and direct MLCP solvers
Replies: 1
Views: 31304

Bullet 2.82 released: Featherstone and direct MLCP solvers

The new Bullet 2.82 SDK is available for download: https://code.google.com/p/bullet/downloads/list, svn revision 2704 Some of the features include: Featherstone Articulated btMultiBody, with two-way interaction with regular btRigidBody. See Bullet/Demos/FeatherstoneMultiBodyDemo. Thanks to Stephen T...
by bullet_team
Mon Oct 08, 2012 7:48 pm
Forum: Release Announcements
Topic: Bullet 2.81 Released: Rolling Friction, XML, iOS Neon
Replies: 5
Views: 63886

Bullet 2.81 Released: Rolling Friction, XML, iOS Neon

The new Bullet 2.81 SDK is available for download: https://code.google.com/p/bullet/downloads/list Some of the features of the new release are: SIMD and Neon optimizations for iOS and Mac OSX , thanks to a contribution from Apple. Rolling Friction using a constraint, thanks to Erin Catto for the ide...
by bullet_team
Mon Mar 05, 2012 6:36 am
Forum: Release Announcements
Topic: Bullet 2.80 SP1 release :OpenCL rigid bodies & Android
Replies: 17
Views: 136022

Bullet 2.80 SP1 release :OpenCL rigid bodies & Android

You can download Bullet 2.80 SP1 now. Make sure to get SP1 revision 2531 , it includes some last minute fixes and a new VoronoiFractureDemo. We fixed some performance regression after the initial 2527 release. Aside from numerous bug fixes, the main features are: A preview of the upcoming Bullet 3.x...
by bullet_team
Sat Sep 17, 2011 1:11 am
Forum: Release Announcements
Topic: Bullet 2.79 release: new convex decomposition and premake
Replies: 4
Views: 50570

Bullet 2.79 release: new convex decomposition and premake

You can download Bullet 2.79 now, based on SVN revision 2440. Bullet 2.79 is mainly a bugfix release, but there are also some improvements, for example: New convex decomposition method, based on the HACD library. Thanks to Khaled Mamou for HACD and Sujeon Kim for the integration into Bullet. See Bul...
by bullet_team
Sat Apr 09, 2011 4:42 am
Forum: Release Announcements
Topic: Bullet 2.78 released: FractureDemo, CCD,SAT contact clipping
Replies: 6
Views: 56638

Bullet 2.78 released: FractureDemo, CCD,SAT contact clipping

You can download Bullet 2.78 now, based on SVN revision 2384. New in Bullet 2.78 Fracture and glueing demo that can break or glue child shapes of a btCompoundShape when certain impulse thresholds are exceeded. See Bullet/Demos/FractureDemo Breakable constraints, based on an applied impulse threshold...
by bullet_team
Wed Sep 22, 2010 11:37 pm
Forum: Release Announcements
Topic: Bullet 2.77 is released! OpenCL & DX11 cloth, 3ds Max plugin
Replies: 8
Views: 68838

Bullet 2.77 is released! OpenCL & DX11 cloth, 3ds Max plugin

You can download the Bullet 2.77 from the usual place at http://code.google.com/p/bullet/downloads/list (based on svn revision 2218) The main new feature is the OpenCL and DirectCompute hardware accelerated cloth simulation. Thanks to Lee Howes from AMD for this contribution and thanks to NVIDIA for...
by bullet_team
Thu Feb 25, 2010 1:46 pm
Forum: Release Announcements
Topic: Bullet 2.76 is released! New .bullet binary file format
Replies: 0
Views: 29909

Bullet 2.76 is released! New .bullet binary file format

You can download the Bullet 2.76 from the usual place at http://code.google.com/p/bullet/downloads/list (based on svn revision 2046) The main new feature is the new .bullet binary physics file format . The .bullet serialization has been build directly in the SDK, so there is no need to link against ...