Eric,
On my site there is a tutorial called "Saga of the Leaf". The author
(EndorWiggens) makes a falling leaf animation, with wind effects and
collision detection. Maybe the source will have some info that will aid you.

www.crosswinds.net/~povstudy
once you are past the enter page, select [Tutorials][POV Custom] towards the
upper left of the screen. Click the image to open the tutorial.

Hope it helps...
Regards,
C.J. - POV User


Eric Andersen <eri### [at] zerotensororg> wrote in message
news:39E61F30.EC686083@zerotensor.org...
> Here's a short clip from a test run of some particle macros i've been
> working on.  121 spherical blob components with individual motion and a
> very buggy collision handler.  I've been trying to use the trace
> function for collision detection, but I'm still having problems.  I'm
> trying to come up with a generalized way of implementing collisions
> between nonspherical objects.  (i think i have an idea)...
> Anyway, thought this one looked cool, so i'm posting it here.
>
> -Eric

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