In article <chrishuff-42F2AF.16585120062000@news.povray.org>, Chris 
Huff <chr### [at] maccom> wrote:

> I will dig up the source and post it when I have a chance(an incoming 
> severe thunderstorm may slow me down).

I apparently deleted the file while spring cleaning...fortunately, the 
scene was pretty easy to duplicate. Posted in povray.text.scene-files as 
"Flow.pov".

I might expand on this, adding water flow/spray effects, friction, etc, 
but this demonstrates the basic technique. I used trace() because not 
only the proximity but the direction is needed...eval_pattern() could 
still be used, but you would have to use several calls of the function 
to determine the general direction.

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/

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