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Re: programming error: no solution found for Bezier intersection
From: |
Reinhold Kainhofer |
Subject: |
Re: programming error: no solution found for Bezier intersection |
Date: |
Wed, 14 Sep 2011 11:59:03 +0200 |
User-agent: |
KMail/1.13.6 (Linux/2.6.38-11-generic; KDE/4.7.0; i686; ; ) |
Am Wednesday, 14. September 2011, 06:47:50 schrieb Colin Campbell:
> On 11-09-13 09:29 PM, Nick Payne wrote:
> > Ok, the following small example reproduces the error on my system with
> > 2.15.11:
The minimal example is (the normal fingering "-1" does not have any influence,
so it should be removed, too, and the language is also not relevant):
%======================================
\version "2.15.11"
\relative c'' {
\set strokeFingerOrientations = #'(up)
\override StrokeFinger #'avoid-slur = #'outside
<a-\rightHandFinger #2 >16( b)
}
%======================================
This example shows clearly that StrokeFinger is to blame here.
The warning appears only with #'avoid-slur=#'outside, not with 'inside.
However, the actual value of strokeFingerOrientations is not relevant (as long
as you set it to some value), the warning appears both with #'(up) and with
#'(down).
> > If I get rid of the right hand fingering then the error goes away, and
> > if I comment out the override for StrokeFinger #'avoid-slur then the
> > error also goes away but the log contains the warning:
> >
> > /home/nick/lilypond/examples/test.ly:14:13: warning: Ignoring grob for
> > slur: StrokeFinger. avoid-slur not set?
> > <as-1
> >
> > -\rightHandFinger #2 >16( b)
That's definitely a bug. The StrokeFinger seems to be missing the avoid-slur
property (and there seems to be a regtest missing for StrokeFinger).
> Nick, one of our developers is working on Bezier range calculations:
> there is an open tracker item
> (http://code.google.com/p/lilypond/issues/detail?id=1784
> <http://code.google.com/p/lilypond/issues/detail?id=1784>) which sounds
> like your problem.
I guess only Mike Solomon can answer that question, since he didn't describe
which problem he tries to solve with the patch...
Cheers,
Reinhold
--
------------------------------------------------------------------
Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
* Financial & Actuarial Math., Vienna Univ. of Technology, Austria
* http://www.fam.tuwien.ac.at/, DVR: 0005886
* LilyPond, Music typesetting, http://www.lilypond.org