Bullet 2.71 released: Disney Maya Plugin, CUDA experiments

Download here

Apart from numerous bug fixes, this is new:

  • Walt Disney Studios contributes their in-house Dynamica Maya Plugin for Bullet physics simulation.
  • Check out the Dynama Maya Plugin instruction videos.
  • This Dynamica Plugin is used in Disney’s upcoming 3D animated movie Bolt, for example in the peanuts shot below.
    Thanks to Nicola Candussi and Arthur Shek from Disney for this contribution!
  • Several bug fixes and contributions related to inertia tensor, memory leaks etc.
    Thanks to Ole K and several other contributors.
  • Added btCudaBroadphase in Extras/CUDA: some preliminary research into accelerating Bullet using CUDA.
    Thanks to the particle demo from the NVidia CUDA SDK.
  • Updated CDTestFramework, with latest version of OPCODE Array SAP. See Extras/CDTestFramework
    Thanks to Pierre Terdiman for the update
  • ForkLiftDemo has been finished, finally!
  • Improved performance for btDbvtBroadphase.
    Thanks to Nathanael Presson again, for all his work.

Enjoy!

OLPC Physics Game Jam

OLPC is hosting a Physics Game Jam in Boston from August 29 to 31.

This is a team based rapid game development competition based on creating a physics game for OLPC XO laptops in 48 hours. Remote entries are allowed, and there will be prizes for the winners. PyBox2D is the main physics library that will be used, but anything open source that will run on the XO is fine.

There will be programming workshops such as developing in Sugar, using PyBox2D, and integrating computer vision with physics, so prior experience is not a requirement.

There is more information on the OLPC Wiki: http://wiki.laptop.org/go/Physics_Jam

Registration is free, but donations are encouraged: http://olpcphysics.eventbrite.com/

Bullet @ SIGGRAPH 2008

We are visiting SIGGRAPH again next week.

Some of the Bullet/physics related activities:

  • There will be a Bullet presentation at the Sony booth #521 (exhibition hall) Tuesday, Wednesday and Thursday from 14.15-14.45.
  • We will do a short COLLADA Physics presentation at the COLLADA BOF, Thursday, 14 August | 4:00 pm – 6:00 pm | LACC – Room 511A.
  • And present about Bullet integration in Blender at the Blender BOF, Monday August 11, ~3-4 PM, Convention Center room 501A
  • Some physics enthousiasts will gather on Wednesday after the Jiggly Fluids session (at the exit door), around 6.30PM.

Hope to meet you there,
Erwin

Bullet 2.70 released

Bullet 2.70 physics SDK is available for download now.

Bullet 2.70 bunny car

Some new Features

  • First version of kinematic character controller (non-rigid body). See Demos/CharacterDemo
  • Improved soft body collision detection, using convex clusters. Thanks to Nathanael Presson.
  • Added btMultimaterialTriangleMeshShape, see MultiMaterialDemo
    Thanks to Alex Silverman for the contribution
  • Performance improvements for btDbvhBroadphase, and basic textures/shadow support, thanks to Nathanael Presson
  • Havok .hkx to COLLADA Physics .dae file conversion, see hkx2dae
  • Various bugfixes, thanks everyone for reporting!

Feedback is welcome in the forum.

Enjoy

Bounce, Tumble and Splash book is out

Tony Mullen reported that his new book Bounce, Tumble and Splash! Simulating the Physical World with Blender (Sybex) is out:

“The book covers all of Blender’s simulation functionality in depth including fluid, soft body, cloth, rigid body, particles, hair and much more. This is the first time much of this functionality has been documented in print, so I really hope that the book will help to give these powerful features a much wider audience.

I took a bunch of snapshots to give people an idea of how the books look inside and out, and you can check those out here:

http://www.flickr.com/photos/27828225@N04/sets/72157605715872127/

There’s also a teaser on YouTube I put up some time ago. By all means take a look to get an even better idea of what this book covers:

http://jp.youtube.com/watch?v=3du8ksOm9Fo

The book’s in stock at Amazon:

http://www.amazon.com/Bounce-Tumble-Splash-Simulating-Physical/dp/0470192801

I hope you enjoy the book!

Tony”

Bounce tumble splash cover

Bullet 2.69 Physics SDK released: split impulse, tear & pick Cloth and Soft Bodies

[youtube exss517n1I0]

+ Added split impulse support, penetration recovery won’t add momentum
+ cloth/soft body improvements: picking (pick and drag), tearing (click and release without mouse move), preliminary support for btSoftBody versus compound and concave trimesh
+ Added new btDbvtBroadphase, based on dynamic AABB tree. It has the capability to do view frustum culling and front-to-back traversal. See Extras\CDTestFramework for view frustum culling sample.
+ Enabled new btGjkEpa2 penetration depth solver, thanks to Nathanael
+ Provide access to all persistent manifolds for a given btBroadphasePair, see CharacterDemo for sample usage
+ Added linear and angular motor for btSliderConstraint
+ Add penetration depth test for convexSweepTest
+ removed several warnings for Windows build, thanks to Martijn Reuvers
+ Added Mac Cocoa Xcode project, thanks to TomorrowPlus
+ use collision margin of btBvhTriangleMeshShape for convexTest, Thanks to reltham for the contribution.
+ added custom memory allocator registration, thanks to Sly.

Download Bullet 2.69 from the Bullet repository at Google Code.

Bullet 2.68 Physics SDK released: Soft Bodies and iPhone support

+ New BulletSoftBody library: cloth, rope and deformable volumes, including interaction with rigid bodies. Thanks Nathanael Presson.
+ Added btSliderConstraint
+ Added Extras/CdTestFrameWork, Thanks Pierre Terdiman
+ Added posix thread support (pthreads), Thanks Enrico.
+ Moved ConvexHull into Bullet/src
+ Moved optional quickstep and box-box collision detector to Bullet/src. Thanks Russell Smith for permission to re-distribute under the ZLib license.
+ Many bugfixes and improvements to BulletColladaConverter, btSubsimplexConvexCast, btMultiSapBroadphase, btOptimizedBvh

Download full SDK source code and precompiled Windows and Mac OSX Universal binary demos from http://code.google.com/p/bullet/downloads/list

Wolfgang Engel developed the Oolong Engine 2 for iPhone, and initial Bullet support looks very promising. Unlike most other phones, the floating point performance of the iPhone is very good.
[youtube _8h8yqcTdn8]
Thanks everyone for the hard work and feedback,

Erwin

Bullet 2.67 Physics SDK available now

Bullet 2.67 is available now from http://code.google.com/p/bullet/

  • Add support for fast batch raycasting on SPU / BulletMultiThreaded
  • Add support for 16 and 32-bit indexed triangle meshes in SPU / BulletMultiThreaded version.
  • Improved COLLADA Physics export snapshot from any Bullet btDynamicsWorld. Saving the physics world into .dae (xml textfile) can be useful for debugging etc.
  • Initial version for Character Control Demo
  • Bugfixes in ConvexCast support against the world.
  • Added btCapsuleShapeX/Z
  • Added btTypedUserInfo, useful for serialization
  • Added Stan Melax Convex Hull utility library in Extras/ConvexHull. This is useful to render non-polyhedral convex objects, and to simplify convex polyhedra.

The SVN repository is sychronized with the existing sourceforge repository.

Development is ongoing, and outstanding issues will roll into upcoming releases.

Feedback in this forum issue: http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?f=18&t=1947