Search found 49 matches
- Fri Aug 24, 2012 1:05 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: New research on real-time deformable body dynamics (FEM).
- Replies: 28
- Views: 69903
Re: New research on real-time deformable body dynamics (FEM)
Hmm, I don't find a link to a paper. What am I missing? I also just wanted to comment about PGS. It was previously in this thread stated that PGS provides smooth convergence with improving results for each iteration. There is no guarantee for this. PGS can be noisy and cyclic, and also completely st...
- Mon May 07, 2012 9:03 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Help picking which rigid body library to use
- Replies: 1
- Views: 6982
Re: Help picking which rigid body library to use
AGX Multiphysics has the functionality you need. In particular, if your system is stiff (e.g. high tension in the wires and/or large mass ratios), then I doubt that the game engines will be of much use. They can deal with ratios of perhaps 1:50 while AGX can handle 1:1e9 in such cases, with retained...
- Fri Feb 18, 2011 11:59 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: newton is open source now!
- Replies: 5
- Views: 17757
Re: newton is open source now!
http://newtondynamics.com/forum/viewtopic.php?f=9&p=45765#p45765 newton got released under the same license as bullet! :) i think it's an interesting alternative to bullet. similar features but force based instead of impulse based. what do you think? Given that both use discrete time, the diffe...
- Wed Dec 22, 2010 9:53 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Release of AGX, and some new videos and stuff from Algoryx
- Replies: 4
- Views: 12503
Release of AGX, and some new videos and stuff from Algoryx
Hi all, We have an updated website and quite a few new videos too, including constraint fluid simulations on GPU, wires and some really nice simulator videos from some of our clients. The fluid model is quite nifty and something I started wrestling with almost five years ago. It just got accepted fo...
- Wed Oct 28, 2009 11:44 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Contact handling, bullet method or Bender method??
- Replies: 16
- Views: 16142
Re: Contact handling, bullet method or Bender method??
I am curious about the difference or likeness of "Sequential impulses" and projected Gauss-Seidel iterations. I really can't see any difference. "Sequential impulses" is really just an attempt to give meaning to the one-by-one equation approachs of the Gauss-Seidel method, which ...
- Wed Oct 28, 2009 12:01 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Projected Conjugate Gradient methods for solving LCP's
- Replies: 5
- Views: 8532
Projected Conjugate Gradient methods for solving LCP's
Hi, We're digging deep into CG-methods for solving LCP's, e.g. contact problems. Anyone know of any recent references about this? If I remember correctly, someone implemented projected CG in ODE. Who did this, what was the result and has any of you tried it? (sorry for asking about ODE here, but my ...
- Sat Oct 17, 2009 4:09 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Algodoo Physics Educational Software by Algoryx Simulation
- Replies: 9
- Views: 24647
Re: Algodoo Physics Educational Software by Algoryx Simulation
I rarely login here, so sorry for not responding quickly. The Jacobian projects the generalized coordinate, so Gq is simply the constraint error. This is valid only for linear homogeneous constraints. For the general form, for other types of constraints, refer to Claude's thesis. Baumgarte comes fro...
- Mon Aug 31, 2009 11:40 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Algodoo Physics Educational Software by Algoryx Simulation
- Replies: 9
- Views: 24647
Re: Algodoo Physics Educational Software by Algoryx Simulation
Speaking of Algodoo, we have actually released it now!
Check it out at: http://www.algodoo.com/
We think it is totally cool
Check it out at: http://www.algodoo.com/
We think it is totally cool
- Mon Aug 31, 2009 11:39 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Algodoo Physics Educational Software by Algoryx Simulation
- Replies: 9
- Views: 24647
Re: Algodoo Physics Educational Software by Algoryx Simulation
Is there any chance of a simple explanation of "variational methods"? So far I've read the thesis twice and have yet to understand it well enough to implement.. What it means is that you start from a Lagrangian formulation and you discretize this Lagrangian and then apply a discrete varia...
- Thu Mar 26, 2009 6:44 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Algodoo Physics Educational Software by Algoryx Simulation
- Replies: 9
- Views: 24647
Re: Algodoo Physics Educational Software by Algoryx Simulation
A new version is out under the name "Algodoo - Phun Edition". It is free for
personal and non-commercial use.
See http://www.phunland.com/
The full product will be released in April. It contains some very nifty features including a really cool fluid simulation method.
personal and non-commercial use.
See http://www.phunland.com/
The full product will be released in April. It contains some very nifty features including a really cool fluid simulation method.
- Sat Jan 17, 2009 3:59 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Algodoo Physics Educational Software by Algoryx Simulation
- Replies: 9
- Views: 24647
Algodoo Physics Educational Software by Algoryx Simulation
Yo folks! Some of you might know about the Phun 2D Physics Sandbox. We have developed a branch called Algodoo, specialized for Physics education and optimized it for the Intel-powered classmate PC. The combination of the touch screen with pen input and the accelerometer is totally awesome. We feared...
- Fri Aug 29, 2008 3:59 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Physics for Phun
- Replies: 9
- Views: 18444
Re: Physics for Phun
There's a new website for Phun: http://www.phunland.com/
Phun itself has also been substantially updated since the last post here, and new versions later this fall/winter will have some really cool things, never seen before...
Phun itself has also been substantially updated since the last post here, and new versions later this fall/winter will have some really cool things, never seen before...
- Fri Aug 29, 2008 3:54 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Who invented Islands?
- Replies: 3
- Views: 12529
Re: Who invented Islands?
Hi guys, looking for the paper that introduced the concept of islands or explains them in enough depth to act as a reference. so far I haven't had much joy :/ Slow response on an old thread here, but maybe it is of interest to someone... You can also look for splitting and blocking methods, and per...
- Fri Aug 29, 2008 3:47 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: PhD thesis on numerical methods for rigid bodies
- Replies: 14
- Views: 27739
Re: PhD thesis on numerical methods for rigid bodies
I'm interested in using the quaternion-based constraints that Claude outlines in his dissertation. Some of it is a bit confusing (he defines an attachment frame twice, etc). And some of the details are spread across the chapters, tucked away in long chains of proofs. Does anyone on this forum have ...
- Fri May 30, 2008 6:37 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: A new PGS solver
- Replies: 19
- Views: 38190
Re: A new PGS solver
Yes, hybrid solvers is the way to go, and PGS/Direct blocking is very efficient for many problems. I suppose this paper could be of interest. "A Parallel Block Iterative Method for Interactive Contacting Rigid Multibody Simulations on Multicore PCs" by Claude Lacoursière, Umeå university. ...