Search found 8 matches

by omicron
Mon Apr 24, 2006 5:28 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: 3x3 diagonalize
Replies: 1
Views: 2511

You have some interesting stuff on your website. Thanks for sharing :wink:
by omicron
Tue Apr 04, 2006 12:56 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Contact Manifold Generation: A question about GJK
Replies: 16
Views: 30486

Erwin, you've explained it before, not in great depth but ok... Here's the link, http://www.continuousphysics.com/Bullet/phpBB2/viewtopic.php?t=226 For the "at once" method, you can read this thread, see post from John Nagle: http://groups.google.com/group/comp.games.development.programming.algorith...
by omicron
Sat Mar 18, 2006 8:42 pm
Forum: General Bullet Physics Support and Feedback
Topic: 3D Axis Sweep and Prune added to CVS
Replies: 5
Views: 4709

AxisSweep3 looks compact and efficient. I'm curious though, why doesn't it use stabbing numbers for fast insertion, removal, and queries? Using the stabbing numbers it wouldn't be necessary to add/remove overlapping pairs when sorting the endpoints of each AABB. As it is now overlapping pairs are b...
by omicron
Wed Feb 15, 2006 2:26 pm
Forum: Physics authoring tools, serialization, standards and related topics
Topic: Friction higher on---(EDITED: step 10 should've said y-axis)
Replies: 7
Views: 5819

Hi,

Just to let you know that you can use http://rapidshare.de/ for such purposes. :wink:
by omicron
Fri Feb 03, 2006 6:38 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Gino's Book - Robustness section
Replies: 4
Views: 3942

Well, first off, thank you both for your help! :wink: So, I wrote this little program to test cancellation when subtracting two nearly equal values. // Both delta0 and delta1 suffer from rounding // errors because they're not representable in IEEE-754 float delta0 = 0.432343547394f; float delta1 = 0...
by omicron
Thu Feb 02, 2006 6:24 pm
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Gino's Book - Robustness section
Replies: 4
Views: 3942

Gino's Book - Robustness section

Hi, This question is mainly directed to Gino van den Bergen as it is a little doubt from his book. However, anyone able to help is very welcome. :) So, from page 59 I'm not understanding what Gino is trying to explain in the phrase that starts with "Assume". It's located right in the bottom of the p...
by omicron
Fri Jan 20, 2006 5:41 pm
Forum: General Bullet Physics Support and Feedback
Topic: EPA
Replies: 1
Views: 3145

I was following Gino's book to implement EPA and I misunderstood his closest_is_internal function. It's everything ok now. My bad! :oops:


Thanks anyway!
by omicron
Thu Jan 19, 2006 6:43 pm
Forum: General Bullet Physics Support and Feedback
Topic: EPA
Replies: 1
Views: 3145

EPA

I have implemented EPA these days and ran it to calculate the penetration depth of two boxes but I'm facing a problem for which I don't have a solution. Both boxes have extents 1 in all directions and one box is at (0.5f,0.0f,0.0f) and the other is at (-0.5f,0.0f,0.0f). So, the penetration depth sho...