Hi,

I don't feel as good, asking for isosurface-functions in .newusers, but this
could be that trivial that I do not dare to ask in one of the other groups.

I need a function which represents a cone (with one of the radii =0) in an
isosurface. I tried to "generate" one using the cylinder function (x*x
+z*z -r*r) and modifying the radius by y. That is probably the right way,
but I don't know how to do it right. Everything I can get is a somewhat
parabolic-shape. My math is already to rusty.

Thanks in advance,

Marc-Hendrik

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