In article <3A3C7E22.B67C37A0@gmx.de>, Christoph Hormann 
<chr### [at] gmxde> wrote:

> The 1/r function is probably quite near to reality, although i'm not
> totally sure and it's usually rounded at the bottom.  The 'atan2' part is
> maybe not that realistic, because such flows use to contain a lot of
> turbulence leading to a more irregular pattern.  

This function is actually 1/(r^2 + n), the "+ n" part gives it the 
rounded bottom you were talking about. I would be very surprised if it 
was actually close to describing reality, I just made it to *look* real.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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