Am 02.05.2016 um 18:37 schrieb Bald Eagle:
> I have always wondered what the big deal about negative values was, since once
> it gets revolved 180 degrees, it's the positive value.
> 
> Can the on-curve points simply be redefined to be positive?
> on_curve[n] = abs(original_curve[n]) ?
> 
> I could of course, be way off base with this.

And indeed you are, as LanuHum correctly points out ;)

Because this shape...:

    A
  + |\  /|
  __| \/ |_____axis
    | /\ |
  - |/  \|
         B

... is obviously completely different from this one:

    A____B
  + |    |
  __|    |_____axis
    |    |
  - |____|

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