Wasn't it _Light_Beam_ who wrote:
>How to use any "2D" curve (like lathes) to revolve it and combining with any
>other function ?
>I want to make an Isosurface "Vase" wih some reals (3D, no bumps) reliefs on
>it...
>...
>I suppose I'll must use : #declare my_curve = spline {n, <>, <>, <>...} no ?
>but how to revolves it along Y axis and apply my others isosurface functions
>on it ?
>Am I clear enough ?
>Thanks
>

Here's a few ideas to get you started

Starting with a 2d equation:
<http://www.econym.demon.co.uk/isotut/substitute.htm#sor>

Starting with a 2d spline:
<http://www.econym.demon.co.uk/isotut/splines.htm#lathe>
<http://www.econym.demon.co.uk/isotut/splines.htm#plathe>

-- 
Mike Williams
Gentleman of Leisure

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