Margus Ramst <mar### [at] peakeduee> wrote:
: I.e. how is a "truly infinite" quadric cylinder better than a regular cylinder
: scaled so long that POV considers it infinite?

  There might be some accuracy problems if you scale an object too much
in one direction (remember that it's actually the ray that is
inverse-transformed; scaling the cylinder extremely long in one direction
means actually that you are scaling the rays inside an extremely narrow
area; might be so narrow that you get accuracy problems).
  Also specifying too big endpoints for the cylinder might cause accuracy
problems.

  These accuracy problems can be specially true if you are using an
isosurface. The bigger the contained_by object, the less accurate the
isosurface.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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