"Bald Eagle" <cre### [at] netscapenet> wrote:

> I'm thinking of doing the shell and the chambering all in one go with something
> like the attached.   It seems like a perfect use for the ovus {} object, if it
> gets hollowed out with a rounded cone first.   Then they'd all nest together.

A quick cobbling together of an ovus with an ellipsoid subtracted away.
The shell itself renders fairly quickly, the difference to show the cross
section was _slow_ (6.5 min.)

Parameterizing this would be challenging, to get the spiral tightness and
spacing correct while keeping the chambers properly spaced and angled the right
way...

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