Shay wrote:

> 
> How about sphere_sweeps for column and flutes? Evaluating the spline
> functions would give any circumference you need.
> 


I am not really sure there is support for an interpolated or function 
driven reduction of the radius in the sphere_sweep syntax but I have 
only ever looked at it briefly. In any case I still would not be able to 
compose such a function.

So I'll take a look. Of course I can improvise my own.  (I guess I do 
that sort of thing a lot an so was hoping for some other way.)  Since 
you prodded me with this post, though, I will probably improvise 
something with spheres and cones along a spline.  I'll build the spline 
using the trace function and sample the sphere surface after it is 
already scaled.  I'll do it just to see how it works.

But constructing the thing in mesh is far and away the pragmatic 
approach, it now seems obvious.

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