"Sir Charles W. Shults III" wrote:
> 
>     Are you writing a macro for this?  I have used two spheres, one round
> and one elongated, chopped in half and fused together to make perfect eggs
> before.  Sounds like a useful and simple tool.
Me too. In fact I use this:

#macro ovoid (Center, EquatorRadius, MinRadius, MaxRadius, Directrix)
  union{
    difference{
      sphere{ 0,1 scale (MinRadius/EquatorRadius) }
      plane{ -y, 0 }
    }
    difference{
      sphere{ 0,1 scale (MaxRadius/EquatorRadius) }
      plane{ y, 0 }
    }
    rotate_to(Directrix-Center)
    scale EquatorRadius
    translate Center
  }
#end

Where rotate_to() is something like Reorient_Trans(); it rotates from +y
to the specified vector.

-- 
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