"Tim Attwood" <tim### [at] comcastnet> wrote:
> The z coordinates are just sqrt(1 - pow(new_var, 2))...
> as stated by the parametric you linked, but that is just a
> single cone, not a double cone.

I've replaced the z coordinate of the parametric equation with sqrt(1 -
pow(new_var, 2)) in place of new_var as you said, and I can't perceive an
improvement. Maybe I'm misunderstanding the instructions you gave me. Would you
mind posting a fixed version of the code, instead? Thank you very much.

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