> I need to pack circles into a partial annulus ie part of a larger circle
> bounded by two radii and angles of say 18 & 90.
You might take a look at Descartes Circle Theorem ....
http://en.wikipedia.org/wiki/Descartes'_theorem
Blub from google search ....
In geometry, Descartes' theorem states that
for every four kissing, or mutually tangent, circles,
the radii of the circles satisfy a certain quadratic equation.
By solving this equation, one can construct a fourth circle
tangent to three given, mutually tangent circles.
There is a screen saver in Debian Linux
named Apollonian that uses this algorihm
packing smaller circles into a larger circle ....
The C source code for this screen saver
is available under Debian ....
--
Stanley C. Kitching
Human Being
Phoenix, Arizona
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