Search found 28 matches

by PaulMartz
Tue Nov 08, 2011 3:11 am
Forum: Applications, Games, Demos or Movies using Bullet
Topic: osgBullet v2.0 now available (release notes, video)
Replies: 0
Views: 2919

osgBullet v2.0 now available (release notes, video)

osgBullet v2.0 is now available! osgBullet is a set of software tools for applications that use both OpenSceneGraph (OSG) and Bullet. Like OSG and Bullet, osgBullet is cross-platform C++ F/OSS, and available for use under LGPL. osgBullet was the recipient of a 2010 R&D 100 award. v2.0 is the first ...
by PaulMartz
Mon Oct 17, 2011 4:20 pm
Forum: General Bullet Physics Support and Feedback
Topic: Disable slider constraint when limit is violated
Replies: 6
Views: 2190

Re: Disable slider constraint when limit is violated

That's a novel approach, thanks for posting it. I'll note it for future reference. However it doesn't actually address how to detect when the slider constraint is in violation of a specific limit. And if the answer is to just keep doing what I'm doing by comparing the origin of the world transform, ...
by PaulMartz
Sun Oct 16, 2011 8:45 pm
Forum: General Bullet Physics Support and Feedback
Topic: Change collision filters
Replies: 6
Views: 3746

Re: Change collision filters

Thanks for the info. If I have to remove things, and re-add the bodies, then I'll re-work my code to accomodate that.
-Paul
by PaulMartz
Sun Oct 16, 2011 8:42 pm
Forum: General Bullet Physics Support and Feedback
Topic: Disable slider constraint when limit is violated
Replies: 6
Views: 2190

Re: Disable slider constraint when limit is violated

Thanks, but I only want to break the constraint when one of the slider limits -- in my case, the min limit -- is violated. The breakable constraint seems to allow breakage when an impulse in any direction exceeds the breakage threshold, so the constraint will break against either limit, or even if a...
by PaulMartz
Sun Oct 16, 2011 4:51 pm
Forum: General Bullet Physics Support and Feedback
Topic: Change collision filters
Replies: 6
Views: 3746

Re: Change collision filters

Hm. I figured out why setting the filters in the broadphase proxy didn't work, sort of... The body was part of a slider constraint, and I was using the filters to avoid collisions between the two constrained bodies. When I disabled the constraiont (with setDisable(false)), then setting the filters i...
by PaulMartz
Sun Oct 16, 2011 4:23 pm
Forum: General Bullet Physics Support and Feedback
Topic: Disable slider constraint when limit is violated
Replies: 6
Views: 2190

Disable slider constraint when limit is violated

Hi all -- I'm using a slider constraint to simulate a drawer in a cabinet. I'd like to disable the constraint when the user pulls the drawer all the way out. However, I'm unable to see how I can programmatically determine when the constrained body is at the limit of the constraint. I'm currently abl...
by PaulMartz
Sun Oct 16, 2011 4:15 pm
Forum: General Bullet Physics Support and Feedback
Topic: Change collision filters
Replies: 6
Views: 3746

Change collision filters

Can anyone tell me how to change collision filters? I've tried setting the new filter group and filter mask directly in the BroadphaseHandle of the rigid body, but this doesn't appear to have any effect. I suppose I could remove the rigid body from the simultation and add it again with new filter gr...
by PaulMartz
Sat Sep 10, 2011 5:10 pm
Forum: General Bullet Physics Support and Feedback
Topic: Can't drive btCollisionObject from btMotionState?
Replies: 3
Views: 2115

Re: Can't drive btCollisionObject from btMotionState?

Agreed -- If I'm not using libBulletDynamics to drive the btCollisionObject, then presumably I'm using something else to drive them. Of couse I am; and it's my own application. :-) But, just like with a rigid body dynamics simulation, I still have a need to keep the visual representation in sync wit...
by PaulMartz
Thu Aug 18, 2011 3:57 pm
Forum: General Bullet Physics Support and Feedback
Topic: Can't drive btCollisionObject from btMotionState?
Replies: 3
Views: 2115

Can't drive btCollisionObject from btMotionState?

Hi -- I'm using Bullet for collision detection only, so I'm linking with just libBulletCollision and not using btRigidBody. I'm also visualizing the btCollisionObjects (with OSG). I've discovered that there is no clean way to update the world transform of a btCollisionObject and also keep the graphi...
by PaulMartz
Thu Nov 12, 2009 10:39 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Open Scenegraph and Bullet?
Replies: 7
Views: 9667

Re: Open Scenegraph and Bullet?

Anyone interested in using OSG and Bullet should see the topic "Announcing osgBullet" in this forum:
http://www.bulletphysics.org/Bullet/php ... =17&t=4308
by PaulMartz
Wed Nov 11, 2009 5:18 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Announcing osgBullet
Replies: 1
Views: 5688

Announcing osgBullet

Hi all -- I'm pleased to announce osgBullet, a new open source Bullet-based project, licensed under LGPL. This is an active project with a discussion group, source download, wiki, and issue tracking. It is actively used by the open source VE-Suite application. It is funded by Ames Laboratory and cre...
by PaulMartz
Wed Apr 29, 2009 6:00 pm
Forum: Release Announcements
Topic: First 2D and 3D CUDA PGS constraint solver preview!
Replies: 8
Views: 17840

Re: First 2D and 3D CUDA PGS constraint solver preview!

Hi Erwin -- Thanks for the work on this and also for posting the Windows bunaries. Current Bullet svn head has the Cuda broadphase available, but that's it. I assume once your recent Cuda work is more complete, the Cuda constraint solver will be included in libbulletcuda as well. What is the schedul...
by PaulMartz
Tue Apr 28, 2009 8:51 pm
Forum: General Bullet Physics Support and Feedback
Topic: Fixes for CcdPhysicsDemo
Replies: 1
Views: 1037

Fixes for CcdPhysicsDemo

[ Update: Moved this to an issue ticket at googlecode. (I know, John is thinking: "how many times do I have to rell Paul how to submit a patch?!?" :-) ] Without these changes, uncomment CcdPhysicsDemo.cpp line 28, and you will encounter problems. See the attached patches to resolve the problems. Pat...
by PaulMartz
Wed Jan 28, 2009 9:44 pm
Forum: General Bullet Physics Support and Feedback
Topic: Who added support for btCompoundShape to ColladaConverter?
Replies: 1
Views: 804

Who added support for btCompoundShape to ColladaConverter?

Whoever did this, thank you. This was a thorn in my side in Bullet 2.70. I recently upgraded to current svn head and was pleasantly surprised to find that this functionality now works, using multiple <shape> tags to create a rigid body. Yay!
by PaulMartz
Wed Jan 28, 2009 9:20 pm
Forum: General Bullet Physics Support and Feedback
Topic: Current SVN Cmake HtFluidDemo broke
Replies: 6
Views: 1720

Re: Current SVN Cmake HtFluidDemo broke

Thanks, John, for commiting this, and for the info about posting patches to the Google group. Tested current svn and all builds fine using CMake and VS8/WinXP.