>     In about an hour, they were looking at plants in a whole new light.
We had
> sketch pads and pencils and were counting the trunk-major-branch-minor
> branch-twig numbers (how many divisions) and so forth.  This is exactly
that; a
> set of algorithms to produce the tree based on a compact number of
parameters.
>     It's nice to see that there are people who actually consider this sort
of
> data about the real world.  But POVers often do, when you come right down
to it.

L-System (lyapunov) fractals.

The Algorithmic Beauty of Plants is a great read.  Unfortunately out of
stock.
http://www.amazon.com/exec/obidos/ASIN/0387946764/starwarsportal/002-2809841
-2496806

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