In povray.general Ron Parker <ron### [at] povrayorg> wrote:
: You might be surprised.  Except for the arbitrary transforms (which make
: the problem different, but possibly not much more difficult) it's relatively 
: easy to decompose a matrix into rotations, scales, and translates.  I wrote
: the whole mess up for someone in c.g.r.r. a few years ago; I think I might
: still have it in my outbox.

  How do you decompose a matrix transformation which causes shearing to
rotations, scales and translates?
  For example think about this:

scale <1,.5,.8>
rotate <30,45,20>
scale <.8,.25,.5>
translate <2,3,4>
rotate <15,20,80>

-- 
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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