In article <3D44821F.4C35DD5C@earthlink.net>,
 Dawn McKnight <gru### [at] earthlinknet> wrote:

> Is there a way to say place object a at the intersection of objects b
> and c?

There is no way to guarantee that they intersect at a single point, and 
if they did there wouldn't be a way to find that point reliably. You 
could just look for a random point inside the intersection though, as 
someone else suggested.


> If there isn't, can anyone suggest how I can find the right equation for
> the shape of a sphere scaled to 1.35 times longer in the y direction
> than in the x?  I tried a parabola, but it came out too flat.

Not a parabola, an ellipsoid. Just a scaled sphere. I'm not sure what 
you are trying to do, if you just want points on the sphere, use a 
scaled sphere with the trace() function. If you want an isosurface, just 
inversely scale the inputs to the sphere function.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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