Re: grob::rhythmic-location and \set Score.currentBarNumber

[David Kastrup]

Urs Liska <address@hidden> writes:

> Am 30. September 2019 12:43:46 MESZ schrieb David Kastrup <address@hidden>:
>>"Urs Liska" <address@hidden> writes:
>>
>>> Hi all,
>>>
>>> I use the grob::rhythmic-location function to determine the measure
>>position of a given grob in a score (in the scholarLY annotation
>>engraver). However, if the measure counter is modified using \set
>>Score.currentBarNumber this change is not reflected in the result of
>>grob::rhythmic-location.
>>>
>>> \version "2.19.82"
>>>
>>> {
>>>   \override Score.BarNumber.break-visibility = ##(#t #t #t)
>>>   \override NoteHead.after-line-breaking = 
>>>   #(lambda (grob)
>>>      (ly:message "Location: ~a" (grob::rhythmic-location grob)))
>>>   c'1
>>>   \set Score.currentBarNumber = 12
>>>   c'1
>>> }
>>>
>>> This prints
>>>
>>> Location: (1 . #<Mom 0>)
>>> Location: (2 . #<Mom 0>)
>>>
>>> instead of 
>>>
>>> Location: (1 . #<Mom 0>)
>>> Location: (12 . #<Mom 0>)
>>>
>>> Is this a bug with grob::rhythmic-location?
>>
>>No.  rhythmic-location uses internalBarNumber in order to get unique
>>and
>>sortable results.
>
>
> Ok, I see.
>
> How do I get the "current" bar number then, the one printed as barnumber?

It's not recorded in general grobs.  If you say you need in in
scholarLy, it sounds like a bar number subject to repetition and gaps is
not particularly useful for identification purposes anyway.

-- 
David Kastrup