Search found 31 matches

by Moose
Mon Nov 23, 2015 1:16 pm
Forum: General Bullet Physics Support and Feedback
Topic: CMake artifact names
Replies: 0
Views: 2027

CMake artifact names

Hello, in the CMakeLists.txt for bullet2.8x there's a strange set of lines causing errors for me: +113 SET(CMAKE_DEBUG_POSTFIX "_Debug" CACHE STRING "Adds a postfix for debug-built libraries.") SET(CMAKE_MINSIZEREL_POSTFIX "_MinsizeRel" CACHE STRING "Adds a postfix for MinsizeRelease-built libraries...
by Moose
Wed Apr 08, 2015 9:18 am
Forum: General Bullet Physics Support and Feedback
Topic: Edge of the world
Replies: 2
Views: 1188

Re: Edge of the world

Indeed! It looks like it.
Guess I'll have to create invisible walls then.

Thanks,
Moose
by Moose
Tue Apr 07, 2015 3:32 pm
Forum: General Bullet Physics Support and Feedback
Topic: Edge of the world
Replies: 2
Views: 1188

Edge of the world

Hello, I have just played around and replaced an existing btDbvtBroadphase by bt32BitAxisSweep3. Originally I was under the impression that I had to use the former because my world boundaries were unknown. Now I expected that an object that would free fall until the boundaries specified in bt32BitAx...
by Moose
Sun Nov 23, 2014 2:16 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: NASA Tensegrity Robotics Toolkit
Replies: 5
Views: 23818

Re: NASA Tensegrity Robotics Toolkit

Adam, (Sounds like you got it working: https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim/issues/85) By default, we install Bullet 2.82 with our setup.sh script. If you're interested in helping us upgrade to Bullet 3, let us know! Brian Hi Brian, I hope you still read this response. Are yo...
by Moose
Thu Aug 14, 2014 12:03 pm
Forum: General Bullet Physics Support and Feedback
Topic: strength of grabbing 6dof Constraint
Replies: 1
Views: 1517

Re: strength of grabbing 6dof Constraint

Digging deeper revealed the problem on our side. :roll:
My bad. Some unknown to me method disabled the constraint in those cases...

Please excuse the noise.

Moose
by Moose
Thu Aug 14, 2014 9:03 am
Forum: General Bullet Physics Support and Feedback
Topic: strength of grabbing 6dof Constraint
Replies: 1
Views: 1517

strength of grabbing 6dof Constraint

Hello, I could use a little advice on a problem I'm having with a generic 6dof. Basically, I am using this constraint as picking cursor, much like the demos use point to point. Can can however not use point to point as my picking constraint also needs to rotate the object because this is in an immer...
by Moose
Tue Mar 18, 2014 9:43 am
Forum: General Bullet Physics Support and Feedback
Topic: Solution to the rubber constraint problem?
Replies: 2
Views: 4059

Re: Solution to the rubber constraint problem?

Hi Erwin,

thanks, that's quite a bit of food for thought. I will give these options a shot and see how I go.

Thanks a bunch,

Moose
by Moose
Mon Mar 17, 2014 6:38 pm
Forum: General Bullet Physics Support and Feedback
Topic: Solution to the rubber constraint problem?
Replies: 2
Views: 4059

Solution to the rubber constraint problem?

Hello all, I have generic physics simulation system here based on bullet. It allows people to create constraints and (mostly triangle mesh) shapes to simulate within their own existing application. A little like the Blender integration. So basically everbody likes it and so do I but a major buzzkill...
by Moose
Mon Mar 17, 2014 6:26 pm
Forum: General Bullet Physics Support and Feedback
Topic: Center of mass computation for btGImpactMeshShape
Replies: 2
Views: 5289

Re: Center of mass computation for btGImpactMeshShape

There is btRigidBody::getCenterOfMassPosition() you can try.
I remember having done this, it should be possible.

HTH,
Moose
by Moose
Fri Jan 17, 2014 4:04 pm
Forum: General Bullet Physics Support and Feedback
Topic: btSliderConstraint
Replies: 9
Views: 2852

Re: btSliderConstraint

Gimpact, the Bullet 2 softbody, the kinematic character controller are pretty unstable and unmaintained and a support burden. It is not clear what will happen to those parts yet. On the off chance of this getting a bit off topic ;-) I had the impression Gimpact is not maintained that well. However,...
by Moose
Thu Jan 16, 2014 2:49 pm
Forum: General Bullet Physics Support and Feedback
Topic: btSliderConstraint
Replies: 9
Views: 2852

Re: btSliderConstraint

Antonz wrote: There will be also new Issue/Bug tracker for Bullet 3?
That's an interesting question too.

I had this assertion bug in Gimpact the other day and didn't know what to do with it other than posting it here. Was there a better way?

Cheers,
Moose
by Moose
Tue Jan 14, 2014 2:33 pm
Forum: General Bullet Physics Support and Feedback
Topic: btSliderConstraint
Replies: 9
Views: 2852

Re: btSliderConstraint

Hi Flix, yeah, I got it to work now. Thanks. The trafo needed to be what I know as a "look at" trafo. With that it works as expected. What I am unsure of is how to interpret the parameters of the two-body constructor. Is that sort of a combination of two sliders or how should I read this? Not that i...
by Moose
Tue Jan 14, 2014 10:34 am
Forum: General Bullet Physics Support and Feedback
Topic: Door knocked off hinge constraint by collisions
Replies: 18
Views: 7519

Re: Door knocked off hinge constraint by collisions

I hear ya.
About alternatives or rather an evaluation thereof you may want to read this:
http://elib.dlr.de/79462/1/74320346.pdf

HTH,
Moose
by Moose
Mon Jan 13, 2014 4:40 pm
Forum: General Bullet Physics Support and Feedback
Topic: assertion in Gimpact collision objects with constraints
Replies: 0
Views: 2254

assertion in Gimpact collision objects with constraints

Hello, I'm running Gimpact here for concave triangle meshes. So far with success and I like the results. However, when I have a collision of two if those objects caused by a constraint I get an assertion. I have two test cases. a) A cone shaped static Gimpact mesh with a hinge that lets a dynamic to...
by Moose
Mon Jan 13, 2014 2:37 pm
Forum: General Bullet Physics Support and Feedback
Topic: Door knocked off hinge constraint by collisions
Replies: 18
Views: 7519

Re: Door knocked off hinge constraint by collisions

If I apply small forces to the door it seems to move correctly and respects the angle constraint until... I apply too much force to the door (i.e. through a ball at it with a large mass). Then it kind of "bounces" out of it's location and springs back to its location. The hinge axis will actually c...