Search found 7 matches

by alex-weej
Tue May 29, 2012 4:33 pm
Forum: General Bullet Physics Support and Feedback
Topic: Collision with interior of a collision shape.
Replies: 2
Views: 2187

Re: Collision with interior of a collision shape.

If CD is possible between any two given shapes, inverting one of them (swapping 'inside' for 'outside') would just mean that colliding circumstances before become non-colliding and vice versa. Sensible contact generation would probably be a little more involved, though.
by alex-weej
Mon May 28, 2012 2:39 pm
Forum: General Bullet Physics Support and Feedback
Topic: Non-SPU multithreaded collision detection
Replies: 4
Views: 3591

Re: Non-SPU multithreaded collision detection

Thanks Erwin, good to hear I was on the right track! Am currently hacking the Compound collision algo but will check out this branch.

Cheers
by alex-weej
Fri May 25, 2012 1:44 pm
Forum: General Bullet Physics Support and Feedback
Topic: Sphere Box collisions
Replies: 4
Views: 5059

Re: Sphere Box collisions

Out of interest, did anything come of this?
by alex-weej
Thu May 24, 2012 1:49 pm
Forum: General Bullet Physics Support and Feedback
Topic: Major contact stability improvement
Replies: 57
Views: 32487

Re: Major contact stability improvement

Sounds like some awesome work - how about you share on github?

Thanks
by alex-weej
Thu May 24, 2012 1:28 pm
Forum: General Bullet Physics Support and Feedback
Topic: Non-SPU multithreaded collision detection
Replies: 4
Views: 3591

Non-SPU multithreaded collision detection

Has anyone any experiences/code to share in hacking Bullet to do multithreaded collision detection? I remember reading somewhere that at least one group of people had hacked their own dispatcher together. (The SPU code gives quite different results to the normal dispatcher particularly when dealing ...
by alex-weej
Thu Mar 22, 2012 7:07 pm
Forum: General Bullet Physics Support and Feedback
Topic: Arrow flight modeling
Replies: 5
Views: 4439

Re: Arrow flight modeling

At a guess, air resistance is what keeps the arrow pointing in the direction of flight, given a massive arrowhead. So modelling a torque on the object based on its velocity vector may be a good place to start. Let us know how you get on!
by alex-weej
Thu Mar 22, 2012 3:30 pm
Forum: General Bullet Physics Support and Feedback
Topic: damped Generic6DofSpringConstraint under gravity unstable
Replies: 1
Views: 1677

damped Generic6DofSpringConstraint under gravity unstable

I've noticed that the Generic6DofSpringConstraint does not reach an equilibrium state when gravity is applied. I'm using the code pGen6Dof->enableSpring(5, true); pGen6Dof->setEquilibriumPoint(5, 0); pGen6Dof->setStiffness(5, 200); pGen6Dof->setDamping(5, 0.0005); pGen6Dof->setAngularLowerLimit(btVe...