Le 18-07-20 à 12:09, Bald Eagle a écrit :
> clipka <ano### [at] anonymousorg> wrote:
> 
>> 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.
> 
> I was initially under the impression that he could do this, but they're similar
> shapes, and therefore proportional - not constant distance.
> 
> I just took a scaled torus and then made a scaled copy - it's definitely not
> good.
> 
> I'm assuming Mike wants to make an atmosphere for the globe or something
> similar.
> 
>> In that case, all you'd have to do would be to scale the ellipsoid.
> I already suggested this, and was properly shot down.
> 
> 
> 
> 

If you want the atmosphere for an oblate, rotating, planet, then, it 
will be thicker over the equator and thinner at the poles.
So, a scalled up version of the original ellipsoid should be a prety 
good approximation.

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