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> Depends on exactly which way it isn't perfectly cylindrical in.
How about simply a stretched cylinder, ie an extruded ellipse. You can't
simply scale the torus or cone otherwise the radius/bevel will not be
constant around the perimeter.
As well as having elliptical buttons, the top surface of the buttons on my
phone are also curved (concave inwards). I suppose you could model this in
POV by subtracting a big sphere from the extruded oval. But how to do the
rounded edge then? Matching up a round with the vertical sides (actually
they're slightly off-vertical) of the button with the curved top surface
doesn't sound very easy to me.
> Really, you can go a seriously long way using only quadratics and CSG.
Do you have any examples?
> Think about it - if you wanted to model the Natural History Museum, would
> you built it out of a few quadrillion triangles? Or just cut a few solids
> out of each other? I know what I'd choose...
And I know which one would look like a photo-realistic model and which one
would look like a few solids cut out of each other :-)
> Mmm, interesting. In all the years I've been using POV-Ray, I've never
> actually noticed that before...
I didn't realise it either until I got into designing stuff that people will
actually see (as opposed to internal components). Most companies will
reject any curvature discontinuities.
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