Real-Time Physics Simulation Forum 2009-09-18T00:10:54+00:00 https://pybullet.org/Bullet/phpBB3/app.php/feed/topic/4067 2009-09-18T00:10:54+00:00 2009-09-18T00:10:54+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=15243#p15243 <![CDATA[Re: Bullet 2.75 released: GPU, SPH fluids, overall improvements]]>
  • fixes some reported build system issues
  • adds generic 2d collision support for arbitrary convex shapes using btConvex2dShape generic. See screenshot below from updated Bullet/Demos/Box2dDemo
  • fix minor degeneracy issue with btGjkPairDetector
Enjoy,
Erwin

Image

Statistics: Posted by Erwin Coumans — Fri Sep 18, 2009 12:10 am

]]> 2009-09-11T19:46:06+00:00 2009-09-11T19:46:06+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=15163#p15163 <![CDATA[Re: Bullet 2.75 released: GPU, SPH fluids, overall improvements]]>
It contains one more change:

[*] Disabled optimization in btCollisionWorld::updateAabbs by default (only update active objects). Re-enable it using world->setForceUpdateAllAabbs(false);

Thanks for the feedback,
Erwin

Statistics: Posted by Erwin Coumans — Fri Sep 11, 2009 7:46 pm

]]> 2009-09-10T14:29:23+00:00 2009-09-10T14:29:23+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=15130#p15130 <![CDATA[Bullet 2.75 released: GPU, SPH fluids, overall improvements]]> http://code.google.com/p/bullet/downloads/list

Some features:
  • Smoothed Particle Hydrodynamics (SPH) fluids preview, thanks to Rama Hoetzlein for contributing this under the ZLib license! See Bullet/Extras/sph. The SPH fluids will be integrated into Bullet with two-way interaction, similar to cloth/soft body simulation.
  • GPU physics kernels preview, in preparation for Bullet 3.x. Right now mainly CPU version, you can enable CUDA version manually. The OpenCL version is available in a separate branch. See Bullet/Demos/Gpu2/3dDemo
  • 2D physics demo, with 2D and 3D object interaction, see Bullet/Demos/Box2dDemo
  • New constraints: btHinge2Constraint,btUniversalConstraint,btGeneric6DofSpringConstraint, thanks to Roman Ponomarev
  • Use ALT+Left/Middle/Right Mouse button+mouse motion for Maya-style camera navigation
  • Re-enabled split impulse constraint solver option, to avoid adding momentum due to penetration recovery (includes SIMD support)
  • Removed first argument 'localInertiaTensor, from btMultiSphereShape. Update your code by remove the first argument: it calculates its local inertia from its aabb now.
  • Increased performance by disabling motion state synchronization for static/inactive objects.
    Use btDiscreteDynamicsWorld::setSynchronizeAllMotionStates(true); for backwards compatiblity.
  • Improvements in Soft Body simulation: added tetrahedral volumetric demos, allow for per-triangle/per-tetrahedron collision (pass 0 in generateClusters), increased stability for cluster collision, improved performance of bending constraint generation.
  • Added pre-tick callback option, called at the start of each internal simulation substep.
  • Added optimized capsule-capsule collider, useful for ragdolls.
  • many bug fixes
Thanks everyone for the contributions and patches and other feedback!

Remaining open issues will be addressed in upcoming versions.
Enjoy,
Erwin

Statistics: Posted by bullet_team — Thu Sep 10, 2009 2:29 pm

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