Le_Forgeron <lef### [at] freefr> wrote:
> A torus is a 4th order polynomial, so it should be possible to get an
> elongated torus (as revolution of a circle along an ellipse) with a 4th
> order polynomial, but it might not be as simple for the equation.

  Note that it's not enough to simply use an ellipse as the major radius
because that probably won't keep the minor radius constant throughout
(in the same way as simply scaling the torus unevenly doesn't).

-- 
                                                          - Warp

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