> I tried the scene Tim Nikias v2.0 posted to p.b.s-f and the result looks
> quite promising. Now I shoot only two collision test rays: one is the
> speed vector and the other is gravity. It's not perfect but result looks
> good. Damping was 20%.

Looks great! So you're my competition, eh? ;-)

It seems like you've used the invisible container as object to sample
collisions on: the particles are floating above the surfaces and rebounce
too early. I've described that somewhere in the scene (at least I hope so):
when simulating just point-particles, the center of a sphere would lie on a
surface, and thus the particles would visibly intersect the environment,
though the particles themselvers aren't.

What are you planning to do with the system, how flexible is it? How easy is
it to create different kinds of particles in the same scene?

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
Email: tim.nikias (@) nolights.de

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