automatische Pausensetzung

[Manuela]

Aus irgendeinem Grund sind anscheinend eine Menge Beiträge aus diesem Thread verschwunden, schade 

Ich fand die Diskussion interessant, auch wenn sie sich nicht mehr um das eigentliche Thema drehte. Vll. hätte man sie in einen eigenen Thread verschieben sollen.

[Manuela]

Ein Code Snippet, auf das ich gestoßen bin:

When two (or more) voices on a staff share common rests, common engraving practice merges these rests into one. The following snippet takes care of that, automatically. Please note that multi-measure rests are not automatically combined

Code: [Auswählen]

%% http://lsr.dsi.unimi.it/LSR/Item?id=336
%% see also http://code.google.com/p/lilypond/issues/detail?id=1228

%% Usage:
%%   \new Staff \with {
%%     \override RestCollision.positioning-done = #merge-rests-on-positioning
%%   } << \somevoice \\ \othervoice >>
%% or (globally):
%%   \layout {
%%     \context {
%%       \Staff
%%       \override RestCollision.positioning-done = #merge-rests-on-positioning
%%     }
%%   }
%%
%% Limitations:
%% - only handles two voices
%% - does not handle multi-measure/whole-measure rests

#(define (rest-score r)
  (let ((score 0)
(yoff (ly:grob-property-data r 'Y-offset))
(sp (ly:grob-property-data r 'staff-position)))
    (if (number? yoff)
(set! score (+ score 2))
(if (eq? yoff 'calculation-in-progress)
    (set! score (- score 3))))
    (and (number? sp)
(<= 0 2 sp)
(set! score (+ score 2))
(set! score (- score (abs (- 1 sp)))))
    score))

#(define (merge-rests-on-positioning grob)
  (let* ((can-merge #f)
(elts (ly:grob-object grob 'elements))
(num-elts (and (ly:grob-array? elts)
(ly:grob-array-length elts)))
(two-voice? (= num-elts 2)))
    (if two-voice?
(let* ((v1-grob (ly:grob-array-ref elts 0))
       (v2-grob (ly:grob-array-ref elts 1))
       (v1-rest (ly:grob-object v1-grob 'rest))
       (v2-rest (ly:grob-object v2-grob 'rest)))
  (and
   (ly:grob? v1-rest)
   (ly:grob? v2-rest)          
   (let* ((v1-duration-log (ly:grob-property v1-rest 'duration-log))
  (v2-duration-log (ly:grob-property v2-rest 'duration-log))
  (v1-dot (ly:grob-object v1-rest 'dot))
  (v2-dot (ly:grob-object v2-rest 'dot))
  (v1-dot-count (and (ly:grob? v1-dot)
     (ly:grob-property v1-dot 'dot-count -1)))
  (v2-dot-count (and (ly:grob? v2-dot)
     (ly:grob-property v2-dot 'dot-count -1))))
     (set! can-merge
   (and
    (number? v1-duration-log)
    (number? v2-duration-log)
    (= v1-duration-log v2-duration-log)
    (eq? v1-dot-count v2-dot-count)))
     (if can-merge
;; keep the rest that looks best:
(let* ((keep-v1? (>= (rest-score v1-rest)
      (rest-score v2-rest)))
(rest-to-keep (if keep-v1? v1-rest v2-rest))
(dot-to-kill (if keep-v1? v2-dot v1-dot)))
   ;; uncomment if you're curious of which rest was chosen:
   ;;(ly:grob-set-property! v1-rest 'color green)
   ;;(ly:grob-set-property! v2-rest 'color blue)
   (ly:grob-suicide! (if keep-v1? v2-rest v1-rest))
   (if (ly:grob? dot-to-kill)
       (ly:grob-suicide! dot-to-kill))
   (ly:grob-set-property! rest-to-keep 'direction 0)
   (ly:rest::y-offset-callback rest-to-keep)))))))
    (if can-merge
#t
(ly:rest-collision::calc-positioning-done grob))))


\score {
  \new Score <<
    \new Staff  <<
      s4-\markup{ LilyPond default, rests in both voices. }
      \relative c'' { c4 d e r | r2  e4 g | R1 }
      \\
      \relative c'' { c4 b a r | r a g2   | R1 }
    >>       
    \new Staff \with {
      \override RestCollision.positioning-done = #merge-rests-on-positioning
    }
    <<
      s4-\markup{Merge rests as per standard notation practice.}
      \relative c'' { c4 d e r | r2  e4 g | R1 }
      \\
      \relative c'' { c4 b a r | r a g2   | R1 }
    >>   
  >>
  \layout {}
}