Re: Beam not breaking

[Jean Abou Samra]

Hello Kieren, and happy new year!

Le 31/12/2021 à 04:06, Kieren MacMillan a écrit :
> Hi all,
>
> Never mind… I figured it out.
>
> Now on to the bug (?) I actually wanted to ask about.  =)
>
> \version "2.23.4"
> {
>    \time 1/4
>    \override Beam.breakable = ##t
>    \override Beam.positions = #'(4 . 3)
>    c'8 8[ \break 8] 8
> }
>
> Is that expected output?

I've added this example to
https://gitlab.com/lilypond/lilypond/-/issues/3415

I've also posted a workaround there (but
I don't personally have the time to debug it
at the moment).

\version "2.23.6"

forceStemLength =
#(define-music-function (len) (number?)
   (once
    (propertyOverride
     '(Stem after-line-breaking)
     (lambda (grob)
       (let ((beam (ly:grob-object grob 'beam)))
         (ly:grob-property beam 'quantized-positions)
         (ly:grob-set-property! grob 'length len))))))

{
  \time 1/4
  \override Beam.breakable = ##t
  \override Beam.positions = #'(5 . 3)
  c'8
  \forceStemLength 16.5
  8[ \break 8]
}


Best,
Jean