POV-TM ( http://www.twisted.net/ ) has an extruded sphere object,
which is the convolution of a sphere with a spline path -- this
is exactly what you want.  However, as 3.1 beta source is still
withheld, it is still at POV 3.02 standards.  Still, it does
have arrays and an "evaluate" function which is similar to
macros, so it is still a powerful tool.

Another option is to do the math and use torus sections.
Or, construct it out of many more cylindrical segments with
spherical connections.

Wykan wrote:
> 
> You know those drinking straws with the little "twisty" bit near the top?
> You can pop it down and compact it, or stretch it out straight, or bend it,
> etc. You know what I mean, yes?
> 
> Well, what would you call that shape? I mean, the shape of each of those
> little segments. It seems like it's just two flat-topped cones, yes?
> 
> But suppose (since it is true) that I want to make an object with a
> "twisty" section like that (not a straw, but that's the best analogy I
> could think of). How would I describe the way each segment changes its
> shape when bent? The "cone" is no longer even, so to speak; the angle of
> one rim is different than the other (more acute on the "inside" of the
> bend).
> 
> Any suggestions ... ?
> 
> Thanks in advance,
> Wykan

-- 
http://www.flash.net/~djconnel/

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