Dear Aaron,
I found a solution. : trick the "hideEveryOtherBarLine" mechanism so it
believes the bar number where the extra "|." bar is located is odd.
%%%%%%%%
a2. |
b2 \fermata _"Fine" \set Score.currentBarNumber = #55 \bar "|." r4
\set Score.currentBarNumber = #55 |
a2 b4 |
%%%%%%
Without the double change of bar numbers the "|." bar is made transparent
by \hideEveryOtherBarLine .
Thanks a lot again :-)
Philippe
Le dim. 28 mars 2021 à 01:54, Philippe ZELLER <peli...@gmail.com> a écrit :
> Dear Aaron,
> this is brilliant ! I'm impressed as I would never have been able to write
> code like this myself.
> Plus : your solution is compatible with multiMeasureRests.
>
> Yet another challenge for you though :-) :
> In the middle of the piece there is a \bar "|." occurring after the second
> beat, and when using your custom engraver this barline becomes invisible.
> How can I make it visible again ?
>
> Best regards,
> Philippe
>
> Le sam. 27 mars 2021 à 21:52, Aaron Hill <lilyp...@hillvisions.com> a
> écrit :
>
>> On 2021-03-27 1:04 pm, Philippe ZELLER wrote:
>> > Dear lilypond fellow users,
>> > it sometimes occurs in barock music that only every other barline is
>> > visible, (see e.g. Haendel's Salomo, choir at the end of Act II ) or
>> > that
>> > every other barline is printed in reduced size.(see e.g. Bach Mass in
>> > H-moll, nr 27 "dona nobis pacem" ).
>> > Is there a way to get this result in lilypond ?
>> >
>> > I first tried
>> > \set Score.barLineVisibility = #(every-nth-bar-number-visible 2)
>> > that I made up after an equivalent syntax for barNumber, but to no
>> > avail.
>> > Maybe I didn't put it in the right context ?
>> >
>> > Finally I used a rather complicated procedure based on
>> > global = {
>> > \repeat unfold 24 { s2. \once \override Staff.BarLine.transparent
>> > =
>> > ##t s2. \once \override Staff.BarLine.transparent = ##f }
>> > }
>> > which works but is not fully compatible, for example it does not work
>> > with
>> > multiMeasureRests.
>> >
>> > Many thanks in advance for your suggestions !
>>
>> An engraver should be able to do the work:
>>
>> %%%%
>> \version "2.22.0"
>>
>> hideEveryOtherBarLine =
>> #(lambda (ctx)
>> (define (bar-num)
>> (ly:context-property ctx 'currentBarNumber))
>> (make-engraver
>> (acknowledgers
>> ((bar-line-interface trans grob source)
>> (if (= 0 (modulo (bar-num) 2))
>> (ly:grob-set-property! grob 'transparent #t))))))
>>
>> \new Staff
>> \with { \consists \hideEveryOtherBarLine }
>> \repeat unfold 10 { b'1 }
>> %%%%
>>
>>
>> -- Aaron Hill
>
>
