In article <kbmdpv0fs9jn820cedri29cku2n155h3f5@4ax.com>,
 ABX <abx### [at] abxartpl> wrote:

> isosurface{
>   function{ f_sphere{ x , y , z , f_Spline(y).x }
> }

I think you meant: f_sphere(x, 0, z, f_Spline(y).x)

In other words, using a spline to control the radius of a cylinder. 
Obviously, this will only work with sor-like shapes, with a single 
radius. A lathe-type isosurface will be a bit more difficult.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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