Search found 11 matches

by ngaloppo
Mon Jul 28, 2008 7:47 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Soft bodies early preview
Replies: 41
Views: 31456

Re: Soft bodies early preview

I am confused. Which of Matthias' methods is used? Stiffness Warping (aka Virtual Materials) or Shape Matching? Stiffness Warping: M. Müller, M. Gross, Interactive Virtual Materials, in Proceedings of Graphics Interface (GI 2004), pp 239-246, London, Ontario, Canada, May 17-19, 2004. (http://www.mat...
by ngaloppo
Sat Feb 23, 2008 3:16 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Slides available for GDC08 Physics Tutorial on SPU Physics
Replies: 3
Views: 3059

Re: Slides available for GDC08 Physics Tutorial on SPU Physics

Cool. Could you post a page with the links to the references in the slides? Somehow, they didn't get included in the pdf.
by ngaloppo
Sun Nov 11, 2007 5:08 am
Forum: Physics authoring tools, serialization, standards and related topics
Topic: skinned meshes export?
Replies: 0
Views: 1925

skinned meshes export?

Has anyone gotten the COLLADA 1.4 blender physics exporter to export skinned meshes (with blend weights) ?

It seems to ignore weights in my blend file, although the armature is exported.
by ngaloppo
Thu Nov 08, 2007 2:21 pm
Forum: General Bullet Physics Support and Feedback
Topic: Memory management when frequently deleting dynamicsWorld
Replies: 11
Views: 12634

Re: Memory management when frequently deleting dynamicsWorld

In general, delete objects in reverse order of creation, for example see BasicDemo: Hmm, is this a design decision? I've grown accustomed to using reference counted pointers to manage and pass around most non-time-critical allocated objects, making the bookkeeping of what is alive and what not more...
by ngaloppo
Mon Oct 29, 2007 8:26 pm
Forum: General Bullet Physics Support and Feedback
Topic: btStridingMeshInterface example with mesh sharing
Replies: 2
Views: 2543

Re: btStridingMeshInterface example with mesh sharing

Erwin Coumans wrote: See the Demos/VehicleDemo how to share existing index/vertex array from main memory (potentially graphics data).

Hope this helps,
Erwin
Thanks! Very useful...

--nico
by ngaloppo
Tue Oct 23, 2007 5:14 pm
Forum: General Bullet Physics Support and Feedback
Topic: btStridingMeshInterface example with mesh sharing
Replies: 2
Views: 2543

btStridingMeshInterface example with mesh sharing

Is there an example of class implementation of the btStridingMeshInterface that actually uses the concept of mesh sharing (graphics/physics/collision) in bullet? Specifically, I'm looking for an example on how to point the collision engine to specific OpenGL buffers on the GPU that can be changed by...
by ngaloppo
Thu Oct 18, 2007 7:51 pm
Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
Topic: PAL : Physics engine comparison : Source code and results
Replies: 14
Views: 14809

Re: PAL : Physics engine comparison : Source code and results

Hi! I agree with Erin, this is very useful stuff, especially for sanity-checking! Thanks for all the efforts! I have a few comments: * Collision benchmark: it seems that only 3 engines are represented in the graphs? * For the Materials benchmark: Is it possible to plot the 'physically correct' analy...
by ngaloppo
Tue Oct 16, 2007 2:19 pm
Forum: Physics authoring tools, serialization, standards and related topics
Topic: Collada to Bullet loader/importer
Replies: 6
Views: 13321

Re: Collada to Bullet loader/importer

Bullet 2.63 has those files in a new ColladaConverter libary library in Extras/BulletColladaConverter
Thanks Erwin, that's really useful!
by ngaloppo
Wed Oct 03, 2007 1:41 pm
Forum: Physics authoring tools, serialization, standards and related topics
Topic: Physics Constraint Module Documented
Replies: 3
Views: 4377

Re:

What's the ConstraintWrapper for? I can't really tell from the documentation.
by ngaloppo
Tue Jan 09, 2007 6:45 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: High order sparse matrix LCP solver?
Replies: 7
Views: 6653

I've used PARDISO. Indeed, I don't think it does LCP.

It's fast but I'm not convinced about its speed, especially about the backsubstitution part.

Let me know how it compares to UMFPACK, I'm interested.