Greg M. Johnson <gre### [at] my-dejanewscom> wrote:
: 3. I don't understand a slope_map

  Then you should learn it, don't you think?

: when I just want it all to be "down"

  That doesn't make any sense.
  How can a normal be "all down"? What does that mean?

  A slope map can have positive and negative slopes (or 0 slopes for that
matter).
  There's no such thing as "slope which is down" or "slope which is up".
Slopes do not express the height of anything. Slopes express the change
in height. There's a difference there.
  A negative slope means that the surface is "going down". It doesn't define
the actual height of the surface.

  If you want a normal pattern at a constant height, then don't define a
normal pattern at all. Then you'll get an unmodified surface normal.

-- 
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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