POV-Ray : Newsgroups : povray.general : Offset surface : Re: Offset surface Server Time: 24 May 2019 01:32:10 GMT
  Re: Offset surface  
From: clipka
Date: 20 Jul 2018 14:42:06
Am 20.07.2018 um 00:59 schrieb Mike Horvath:
> Analogous to "parallel curve", but in three dimensions.
> https://en.wikipedia.org/wiki/Parallel_curve
> What formula could I use to generate an "offset surface" for an
> ellipsoid/spheroid? (An ellipse rotated around a vertical axis.)
> Would a parametric function or implicit function be better or faster or
> simpler?

You /could/ just pretend that the parallel curve to an ellipsis is also
an ellipsis. AFAIK that's not true, but it could be sufficiently close
for your purposes.

In that case, all you'd have to do would be to scale the ellipsoid.

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