Search found 6 matches

by chand81
Wed Oct 17, 2007 3:59 am
Forum: General Bullet Physics Support and Feedback
Topic: Moments of inertia
Replies: 10
Views: 12833

Re: Moments of inertia

This means the inertia becomes a vector3, instead of a 3x3 matrix. Requiring the frames to be aligned is not an approximation. Each frame, the local inertia is transformed into worldspace, resulting in a 3x3 matrix. This means when the rigidbody moves and rotates in space, the moment of inertia in ...
by chand81
Tue Oct 16, 2007 7:54 am
Forum: General Bullet Physics Support and Feedback
Topic: Moments of inertia
Replies: 10
Views: 12833

Re: Moments of inertia

The inertia tensor for a cube is similar to that of a sphere - both scalars. So the approximation is justified. But I find it hard to understand that rotating a cube about any axis would require the same amount of work irrespective of the choice of axis. (this is understandable for a sphere, whichev...
by chand81
Sun Sep 23, 2007 3:02 pm
Forum: Career Opportunities
Topic: Physics Programming Job - Requirements?
Replies: 0
Views: 6928

Physics Programming Job - Requirements?

What are the basic requirements for an entry level Physics Programming post? What educational background is required? What level of experience is expected, if any? What qualities does an employer look for when recruiting for a physics programming post? Please post your views and/or experiences here ...
by chand81
Wed Aug 29, 2007 5:56 am
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Conservative Advancement for Ellipsoid
Replies: 2
Views: 4368

Sorry I couldn't follow up earlier. Wanted to have something concrete before posting. I have been working on CA for ellipsoid (amidst all other things that I need to worry about) for quite some time now. Unfortunately haven't seen stable results yet with my physics simulator, this is mainly due to m...
by chand81
Thu Aug 16, 2007 7:47 am
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Conservative Advancement for Ellipsoid
Replies: 2
Views: 4368

Conservative Advancement for Ellipsoid

I have been studying the following resources: http://cg.informatik.uni-freiburg.de/course_notes/WS06/ca_12_mai_coldet.pdf http://graphics.ewha.ac.kr/fast/FAST.pdf This is how I look to apply the information to the ellipsoidal case: http://img254.imageshack.us/img254/4940/img1xr0.png http://img262.im...
by chand81
Thu Aug 16, 2007 7:45 am
Forum: Research and development discussion about Collision Detection and Physics Simulation
Topic: Collision Detection for Translating & Rotating Ellipsoid
Replies: 1
Views: 3595

Collision Detection for Translating & Rotating Ellipsoid

I have successfully implemented swept ellipsoid v/s triangle test.

Now I'm looking at adding support for rotation.

How can I approach this problem? Can Conservative Advancement be applied here?