On 8/2/2018 8:37 PM, Bald Eagle wrote:
> I haven't had to dig into this, but it's possible to make the hyperboloid while
> specifying the foci, so I can't imagine the ellipsoid is any more difficult:
> 
>
http://news.povray.org/povray.binaries.images/message/%3Cweb.591d8c269364765ac437ac910%40news.povray.org%3E/#%3Cweb.591
> d8c269364765ac437ac910%40news.povray.org%3E
> 
> 
> Looks like a Two-fer:
> https://theinnerframe.wordpress.com/2016/08/01/quadrics/
> 
> 
> 
> 

Since I'm trying to model ellipsoidal coordinate system, the formulas 
need to be parametric, so that I can make proper grid lines at the 
correct intervals and angles and so forth. You and Tor Olav did a great 
job of figuring out the method of creating offset surfaces of implicit 
functions. Would you mind trying the same for parametrics? Thanks.


Mike

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