Re: vertical spacing of rests

[Thomas Morley]

2015-08-23 14:04 GMT+02:00 Klaus Blum <address@hidden>:
> Peter Selinger wrote
>> your code snippet does not work correctly if some of the rests are
>> dotted (see attached for the output). It's a bit of a mystery to me
>> why this happens.
>
> Hi Peter,
>
> hmmm... I didn't think of this. It's no mystery, it's the
> Dot_column_engraver who makes sure that both dots are visible:
>
> %----------------------------------------
> \version "2.19.25"
>
> centerRests = {
>   \override Rest.staff-position = #0
> }
>
> \new Staff <<
>   \new Voice
>   \relative c'' {
>     \voiceOne
>     \centerRests
>     r  c  r  d | r2. e4
>     d2. e4
>   }
>   \new Voice
>   \relative c'' {
>     \voiceTwo
>     \centerRests
>     r4 a8 a8 r4 b8 b8 | r2. c4
>     c2. a4
>   }
>>>
> %----------------------------------------
>
> Turning it off completely would result in a mess.
>
> Unfortunately, I don't know a quick way to prevent this. In one of the
> voices, you could set dot-count to zero, but this would affect notes and
> rests in the same way.
> A quick and dirty approach would be to remove the Rest_engraver from the
> second voice:
>
> %----------------------------------------
> \version "2.19.25"
>
> centerRests = {
>   \override Rest.staff-position = #0
> }
>
> \new Staff <<
>   \new Voice
>   \relative c'' {
>     \voiceOne
>     \centerRests
>     r  c  r  d | r2. e4
>     d2. e4
>   }
>   \new Voice \with {\remove "Rest_engraver"}
>   \relative c'' {
>     \voiceTwo
>     %\centerRests
>     r4 a8 a8 r4 b8 b8 | r2. c4
>     c2. a4
>   }
>>>
> %----------------------------------------
>
> If you look for an automatic solution that detects if both voices have the
> same rests, go for the merge-rests-engraver already mentioned by Harm.
> AFAIK the most recent version is here:
> https://github.com/openlilylib/openlilylib/tree/master/editorial-tools/merge-rests-engraver
>
> Cheers,
> Klaus


I'd recommend to use the engraver!

Anyway, if you want to have the dots for rests affected as well, you
need to adress them through the Rest:

\version "2.19.25"

omit-rest-and-dots =
\override Rest.after-line-breaking =
  #(lambda (grob)
    (ly:grob-set-property! grob 'stencil #f)
    (if (not (null? (ly:grob-object grob 'dot)))
        (ly:grob-set-property! (ly:grob-object grob 'dot) 'stencil #f)))

centerRests = {
  \override Rest.staff-position = #0
}

\new Staff <<
  \new Voice
  \relative c'' {
    \voiceOne
    \omit-rest-and-dots
    r4  c  r  d | r2. e4
    d2. e4
  }
  \new Voice
  \relative c'' {
    \voiceTwo
    \centerRests
    r4 a8 a8 r4 b8 b8 | r2. c4
    c2. a4
  }
>>

HTH,
  Harm