Real-Time Physics Simulation Forum

Looks like we finally get to see some gpgpu physics: http://www.cmpevents.com/GD06/a.asp?option=C&V=11&SessID=2113 Havok FX・ GPU-accelerated Physics for PC Games Speaker: Andrew Bond Date/Time: Thursday (March 23, 2006) 4:00pm ? 5:00pm Track: Game Design Format: 60-minute Sponsored Session E...

There are roughly 2 different ways you can tackle the contact manifold generation: incrementally, or at once. For incrementally: Basically you need a couple of things: every collision step: 1) calculate a new closest point (vclip, or other algo like gjk) 2) check if this point is already in the cont...

The new official 2.41 Blender release is out now: http://www.blender3d.org. It has support for OpenGL GLSL vertex and fragment shaders, Blender Materials and multi viewport. Get the full 2.41 demos here (includes extras like Domino demo, GLSL pond): http://www.continuousphysics.com/ftp/pub/test/inde...

Is there any way to make a realistic car driving game. It would be great to run into piles of boxes. Only bullet physcis works for boxes. It would be possible doing in Python, within Blender. I will prototype some vehicle for next release (2.42?). So built-in vehicle support will be added soon. Erwin

the material settings for friction do have an impact. Make it really small for both objects, to see the effect.

run in a python script at least once for the game, and add

import PhysicsConstraints
PhysicsConstraints.setDeactivationTime(0.0)

That should do the job. See the 'debug' script in jenga7.blend as an example.

Bullet (as well as some other commercial physics engines, although a bad excuse) has some hard limits. Knowing them is crucial to use the physics engine successfully. Basically dynamic objects smaller then say 0.30 units in any direction will fail. This is because there is a tolerance/margin of 0.06...

In a nutshell, there are optimizations for complex shapes, by porting BVH to the GPU, and Cullide. However I haven't seen basic convex collision detection on GPU. Signed Distance Maps on GPU, or other solutions? Perhaps Christer Ericson has some knowledge on the subject for us (you know, since he's...

Hello all. I guess this question seems relevant mostly to Redon, but since I'm a newbie I believe almost anyone will be able to resolve my confusion. I'll ask if Stephane Redon is available for some feedback. 1. I use interval arithmetic for continuous collision detection. However, I don't use scre...

Posted this already on gpgpu.org http://www.gpgpu.org/forums/viewtopic.php?t=1877 In a nutshell, there are optimizations for complex shapes, by porting BVH to the GPU, and Cullide. However I haven't seen basic convex collision detection on GPU. Signed Distance Maps on GPU, or other solutions? Anyone...

I'm not convinced about Java's performance and memory access, but apart from that: A good description of a fast implementation of the Sweep and Prune broadphase can be found in Gino van den Bergen's book on collision detection: http://www.dtecta.com and http://www.amazon.com/exec/obidos/tg/detail/-/...

I appreciate and respect all contributions. Therefore no post have been removed, only split. Antonio asked to have the topic split into patent-related posts and pgs-impulse comparison posts. This is what I did. See this post: http://www.continuousphysics.com/Bullet/phpBB2/viewtopic.php?t=208 I remov...

Being optimistic i guess that the patent is more related to the specific PGS Richard developed, which involves some clever optimisations we now know well about. Well, the patent describes exactly the implementation and optimizations used in the fast iterative quickstep solver in ODE, as well as the...

Wow this is outrageous and disgusting. Projected Guass Seidel is been used by mostly all real-time physics engines since they became a software commodity. I used to work with Math Engine before it when under and the last incarnation implemented the same method and it was called the Arthur Solver, r...

Did you know about this Ageia patent that describes Projected Gauss Seidel used to solve rigidbody dynamics lcp's? It's here: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=3&f=G&l=50&co1=AND&d=PG01&...