On 16.03.07, Michael J Gruber wrote:
> > On 15.03.07, Michael J Gruber wrote:
> >> Lander venit, vidit, dixit 2007-03-15 15:56:
> >>
> >> Oh, I see it's kind of patched in svn already: Now, the default value of
> >> length is 1, not None, so that things work if you don't specify a
> >> length. Passing "length=None" still doesn't work, so I guess the
> >> description should be changed.
> >
> > The same has already been reported by Stefan Schenk (see pyx bug
> > 1632988). Also the manual has been corrected in the svn version.
>
> Who's looking at the manual ;)
>
> I meant the docstrings for path.path.tangent(),
> normpath.normpath.tangent() and the _pt variants.
>
> >
> > However, J?rg did not seem to be quite satisfied with the
> > length=1 solution.
>
> I was quite surprised, too. That indeed does scale the tangent in a way
> which depends on the default unit and the current scale factor. It seems
> it's done just in order to save one or two if's.
I agree, this was one of the reasons, I didn't like the patch. The
scaling problem could be solved by using true cms. But the question is
whether one should really introduce a more or less arbitrary length
scale here?
J?rg
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