I doubt this can be done with a (finite) CSG.

Just for clarity, what you need is something like this?

isosurface {
  function { x*x + z*z*(1-y)*(1-y)/4 - (1-y)*(1-y)/4 }
  contained_by { box { -1, 1 } }
}


"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> Hi all,
>
> I need a CSG object that basically has the shape of a cone, but with the
> apex as a straight edge parallel to the base, with a length equal to the
> diameter of the base. I tried all kinds of combinations but am unable to get
> this right.
>
> Any help will be much appreciated. Thanks a lot.
>
> --
> All the best,
>
> Thomas
>
> "Sic vive, tanquam cras moriturus, sic stude, quasi semper victurus."
> Desiderius Erasmus

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