Search found 14 matches

by ProfessionalUser
Mon May 21, 2012 12:53 am
Forum: General Bullet Physics Support and Feedback
Topic: Multi-threaded collisions issue
Replies: 0
Views: 1588

Multi-threaded collisions issue

Hi there, I'm trying to multi-thread the collision detection. I do have the code in place (using pthreads on Linux), based on MultiThreadedDemo. While the results are correct, it doesn't multi-thread unfortunately. I tracked it down to the SpuGatheringCollisionDispatcher not supporting proxies of ty...
by ProfessionalUser
Wed Mar 14, 2012 10:56 pm
Forum: General Bullet Physics Support and Feedback
Topic: Bug - btSoftBody::updateConstants() and area calculations
Replies: 8
Views: 4144

Re: Bug - btSoftBody::updateConstants() and area calculation

The rest length modification in updateConstants() stung me as well. I ended up disabling the updateConstant call by setting variable m_bUpdateRtCst to false before calling step simulation. However, that means I have to replicate everything updateConstants() does except for changing the rest lengths....
by ProfessionalUser
Mon Mar 12, 2012 5:22 am
Forum: General Bullet Physics Support and Feedback
Topic: Soft body module virtual methods
Replies: 2
Views: 2284

Soft body module virtual methods

Hi, it would be really great if the classes in the softbody module could have virtual methods throughout so you can tweak things by deriving off the bullet classes. As it is right now I don't see any way of getting stuff to work the way I need it to work without modifying the library code itself. Th...
by ProfessionalUser
Tue Feb 07, 2012 6:16 am
Forum: General Bullet Physics Support and Feedback
Topic: Ultimate Breakout uses bullet physics
Replies: 3
Views: 6655

Re: Ultimate Breakout uses bullet physics

It's probably too late now, but try
#undef None
before including the soft body stuff.
by ProfessionalUser
Mon Dec 19, 2011 9:37 pm
Forum: General Bullet Physics Support and Feedback
Topic: Rigid body deactivation time threshold
Replies: 1
Views: 2098

Rigid body deactivation time threshold

Is there any way to configure the deactivation time threshold for rigid bodies? Looks like this his hard-coded to 2.0f?
by ProfessionalUser
Fri Nov 25, 2011 3:40 am
Forum: General Bullet Physics Support and Feedback
Topic: Building and running OpenCL demo in Nvidia platform
Replies: 8
Views: 5769

Re: Building and running OpenCL demo in Nvidia platform

Same issue here:

make[2]: *** No rule to make target `BulletMultiThreaded/vectormath/scalar/cpp/mat_aos.h', needed by `all-am'. Stop.
make[2]: Leaving directory `[...]/bullet-2.79_64/src/src'
make[1]: *** [all-recursive] Error 1

Does anyone have a solution for this?
by ProfessionalUser
Thu Nov 24, 2011 11:32 pm
Forum: General Bullet Physics Support and Feedback
Topic: Contact solver parameters explained
Replies: 1
Views: 3452

Contact solver parameters explained

Hello, I'm trying to understand the various contact solver parameters. What does each parameter do exactly? Thanks, Chris btScalar m_tau; btScalar m_damping; //global non-contact constraint damping, can be locally overridden by constraints during 'getInfo2'. btScalar m_friction; btScalar m_timeStep;...
by ProfessionalUser
Tue Nov 08, 2011 12:22 am
Forum: General Bullet Physics Support and Feedback
Topic: btGeneric6DOFConstraint parameters?
Replies: 0
Views: 1465

btGeneric6DOFConstraint parameters?

Hi there,

would be awesome if someone could shed some light on the parameters for configuring a generic 6dof constraint. In particular I'm wondering about these:

-frameInA
-frameInB
-useLinearReferenceA

and, last but not least,

-useFrameOffset

Thanks,
Chris
by ProfessionalUser
Thu Nov 03, 2011 9:00 pm
Forum: General Bullet Physics Support and Feedback
Topic: Documentation
Replies: 1
Views: 1744

Documentation

Hi there, I came to realize that the documentation of bullet is insufficient. The pdf file is a great first read but it merely scratches the surface. Doxygen comments inside the code are quite sparse. The Wiki only discusses certain topics. The examples are great for reference but only present a sma...
by ProfessionalUser
Thu Nov 03, 2011 8:32 pm
Forum: General Bullet Physics Support and Feedback
Topic: btGeneric6DofSpringConstraint damping
Replies: 3
Views: 4210

Re: btGeneric6DofSpringConstraint damping

jarno wrote:
For one thing it is misnamed, given that setting it to 1 gives no damping and 0 is fully damped. I usually end up setting it to a very small value (like 0.001), so it seems to be more like the reciprocal of some sort of damping coefficient.

---JvdL---
+1
by ProfessionalUser
Thu Nov 03, 2011 8:27 pm
Forum: General Bullet Physics Support and Feedback
Topic: LinearJoint, HOW, please HELP?
Replies: 5
Views: 7097

Re: LinearJoint, HOW, please HELP?

"split, cfm and erp? How I'm supposed to know what these mean if no documentation on this is present at all?"

+1
by ProfessionalUser
Thu Oct 27, 2011 12:06 am
Forum: General Bullet Physics Support and Feedback
Topic: Bullet development updates
Replies: 15
Views: 9654

Re: Bullet development updates

Having worked with the bullet library for about two weeks full-time I'd also like to chime in to the need for professional level documentation. The odd comment here and there is just not sufficient. Every class, method and member should have proper Doxygen compatible documentation. Please take a loo...
by ProfessionalUser
Fri Oct 14, 2011 12:12 am
Forum: General Bullet Physics Support and Feedback
Topic: Collision detection between two btBvhTriangleMeshes
Replies: 10
Views: 6155

Re: Collision detection between two btBvhTriangleMeshes

I ran into the same issue, GImpactMeshShape won't draw in debugDraw. Can anyone offer a solution?

Thanks

Update: I got AABB's drawing correctly after calling btGImpactMeshShape::udpateBounds().