Re: Unterminated tie

[Thomas Morley]

2015-09-13 0:11 GMT+02:00 David Sumbler <address@hidden>:
> I have yet another problem related to repeats.  The piece I am setting
> has one instrument which is tied from the last note in the
> first-time-bar to the note at the start of the repeat.  (Moving the
> repeats does not help, because there are a lot of overlapping ties.)
>
> I tried to produce an unterminated tie in the last bar of the first
> alternative by having a second, invisible voice with two tied notes in
> the bar:
>
> \version "2.19.24"
>
> { g'1 ~|
>   \repeat volta 2 { g'1 | d'1 | }
>   \alternative {
>       {
>           << { g'1 } \\ { \override Dots.stencil = ##f
>                           \override Stem.stencil = ##f
>                           \override Flag.stencil = ##f
>                           g'2... ~ g'16
>                           \revert Flag.stencil
>                           \revert Stem.stencil
>                           \revert Dots.stencil
>                       } >> |
>       } {
>           a'1 |
>       } }
>   g'1 |
> }
>
> So far, so good, but the note heads in the bar are still there of
> course.  But when I add "\override NoteHead.stencil = ##f" the compiler
> gives up with the message:
>
> Drawing systems...lilypond:
> /home/gub/NewGub/gub/target/linux-64/src/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/lily/skyline.cc:119:
> void Building::precompute(Real, Real, Real, Real): Assertion `!isinf
> (slope_) && !isnan (slope_)' failed.
>
> Why does this happen?  And is there perhaps a simpler way of producing
> my unterminated tie?

If you set NoteHead.stencil #f, then the Tie has nothing to attach to.
Use point-stencil instead.
Scaling durations will save much code:

\version "2.19.24"

{
  g'1 ~|
  \repeat volta 2 { g'1 | d'1 | }
  \alternative {
      {
        g'1*15/16~
        \once \override Stem.stencil = #point-stencil
        \once \override Flag.stencil = #point-stencil
        \once \override NoteHead.stencil = #point-stencil
        \once \override Tie.minimum-length = 10
        g'16
      }
      { a'1 | }
  }
  g'1 |
}


Other possibility would be to use \repeatTie and use \shape on it.
I doubt it would be the better one ...

Cheers,
  Harm