2018-08-06 21:40 GMT+02:00 Thomas Morley <thomasmorle...@gmail.com>:
> 2018-08-05 18:14 GMT+02:00 Thomas Morley <thomasmorle...@gmail.com>:
>
>> Inspired by your work I come up with the attached.
>
> Attached an improved and simplified version.
> It's tested with 2/3/4-voices divisi, all in one score.
> Although not tested, I see no reason why it shouldn't work with even
> more voices.
Further improvements.
It's now possible to omit 'catch-me, _iff_ single instrument-staves
and divisi-staves belong exculsively to the same container-context
like StaffGroup, GrandStaff, ChoirStaff or PianoStaff with removed
"Keep_alive_together_engraver", which is most likely always the case.
For ungrouped single/divisi 'catch-me is still neccesary.
Cheers,
Harm
\version "2.19.82"
\pointAndClickOff
%% relies on:
%%
%% VerticalAxisGroup.details.catch-me
%% VerticalAxisGroup.details.combined
%%
%% About `catch-me`
%% Inside of container-contexts like StaffGroup, GrandStaff, ChoirStaff or
%% PianoStaff with removed "Keep_alive_together_engraver"
%% `catch-me` may be omitted.
%% To get divisis work outside of such containers `catch-me` needs to be set
%% to a value matching one of the optional arguments of the divisis-procedure
%% Currently we use strings for `catch-me` and the arguments of the
%% divisis-procedure, a symbol would work as well.
%%
%% About `combined`
%% `combined` labels divisi-staffs. It is supposed to be a list of positive
%% integers, representing the combined instruments.
%% p.e. To combine flute-III and flute-IV, set `combined` to '(3 4)
%%
%%
%% More inline comments below
%%
%%
%% Limitations:
%% Staves can't be started/ended mid-line.
%% TODOs
%% Killing/awakening relies on the order single instrument-staves are entered.
%% Is it safe to assume the order of lists with VerticalAxisGroups will
%% not be confused?
%% c/p from lily-library.scm
#(define (split-at-predicate pred lst)
"Split LST into two lists at the first element that returns #f for
(PRED previous_element element). Return the two parts as a pair.
Example: (split-at-predicate < '(1 2 3 2 1)) ==> ((1 2 3) . (2 1))"
(let ((i (and (pair? lst)
(list-index (lambda (x y) (not (pred x y)))
lst
(cdr lst)))))
(if i
(call-with-values
(lambda () (split-at lst (1+ i)))
cons)
(list lst))))
#(define (sort-vags vags)
;; Returns sublists of VAGs in same StaffGrouper
(define (helper l1 l2)
(if (null? l1)
(reverse l2)
(let ((splitted-l1
(split-at-predicate
(lambda (x y)
(equal?
(ly:grob-object x 'staff-grouper)
(ly:grob-object y 'staff-grouper)))
l1)))
(helper (cdr splitted-l1) (cons (car splitted-l1) l2)))))
(helper vags '()))
#(define (select-vags vags)
;; Return two sublists containing VerticalAxisGroups with and without
;; setted 'combined.
(call-with-values
(lambda ()
(partition
(lambda (vag)
(pair?
(assoc-get
'combined (ly:grob-property vag 'details) '())))
vags))
(lambda (x y) (list x y))))
#(define (kill-selected-vags sorted-vags)
;; `sorted-vags` is supposed to be a list of two sublists, containing
;; VerticalAxisGroups for divisi and non-divisi-staves
(if (pair? (car sorted-vags))
(for-each
(lambda (i)
;; if divisi staves are alive, kill selected other staves
;; relying on the combined-values
(for-each
(lambda (x)
(ly:pointer-group-interface::add-grob
x 'make-dead-when (list-ref (car sorted-vags) i)))
;; get a list of VerticalAxisGroups used with
;; divisi-staves
(map
(lambda (index) (list-ref (cadr sorted-vags) (1- index)))
;; get the 'combined-value from 'details, which is
;; supposed to be a list.
;; TODO 'combined is read here and in `splitted` above.
;; Find a method to spare one go
(assoc-get
'combined
(ly:grob-property
(list-ref (car sorted-vags) i) 'details)
'()))))
(iota (length (car sorted-vags))))))
#(define (divisis . divisi-groups)
;; Kill selected other Staffs, if divisi-Staffs are alive.
;; Do it separatly for every instrument-group specified by `divisi-groups`.
(lambda (grob)
;; `grob` is supposed to be `VerticalAlignment`, per default living in
;; Score-context
(let* (;; Get all `VerticalAxisGroup`s from `VerticalAlignment`
;; Those are the relevant grobs to look at to make others dead
;; or not
(vags-array (ly:grob-object grob 'elements))
(vags-list ;; empty lists removed
(if (null? vags-array)
'()
(remove null? (ly:grob-array->list vags-array))))
;; return two sublists containing VerticalAxisGroups with and
;; without setted 'catch-me
(labeled-vags-list
(call-with-values
(lambda ()
(partition
(lambda (vag)
(let ((label
(assoc-get
'catch-me (ly:grob-property vag 'details) #f)))
(and label
(member label divisi-groups))))
vags-list))
(lambda (x y) (list x y))))
;; remove entries without 'staff-grouper from unlabeled VAGs
(cleared-unlabeled-vags-list
(remove
(lambda (vag) (null? (ly:grob-object vag 'staff-grouper)))
(cadr labeled-vags-list)))
;; get sublists of unlabeled VAGs with same StaffGrouper from
;; `cleared-unlabeled-vags-list`
(grouped-unlabeled-vags
(sort-vags cleared-unlabeled-vags-list))
;; labeled VAGs are grouped into sublists according to 'catch-me
(grouped-labeled-vags
(map
(lambda (group)
(filter
(lambda (vag)
(equal?
group
(assoc-get 'catch-me (ly:grob-property vag 'details))))
(car labeled-vags-list)))
divisi-groups)))
(for-each
(lambda (vags)
(let* ((splitted (select-vags vags)))
(kill-selected-vags splitted)))
(append
grouped-unlabeled-vags
grouped-labeled-vags)))))
%% Short-cuts to switch on/off Staves
%% They should be inserted at line-breaks.
switchOff = \set Staff.keepAliveInterfaces = #'()
switchOn = \unset Staff.keepAliveInterfaces
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXAMPLE
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#(set-default-paper-size "a2")
#(set-global-staff-size 15)
\paper {
indent = 20
short-indent = 20
}
%%
%% the actual music
%%
fluteI = \repeat unfold 12 c''2
fluteII = \repeat unfold 12 e'2
trumpetI = \repeat unfold 6 { g'4 c'' e'' c'' }
trumpetII = \repeat unfold 6 { e'4 g' c'' g' }
trumpetIII = \repeat unfold 6 { c'4 e' g' e' }
corI = \repeat unfold 6 { c''2 c''4 c'' }
corII = \repeat unfold 6 { g'2 g'4 g' }
corIII = \repeat unfold 6 { e'2 e'4 e' }
corIV = \repeat unfold 6 { c'2 c'4 c' }
%%
%% controlling divisis
%% colors only for better viewing; ofcourse coding could be more concise
%% p.e. deleting redundant \break-commands, they should likely be part of an
%% own voice anyway; using s1*x etc
%%
%% divisi-Staffs are switched off per default, they may be switched on as wished
%%
%% flutes
combined-flutes-I-II = {
\override NoteHead.color = #green
%% 1
\switchOff
s1 \break
%% 2
\switchOn
s1 \break
%% 3
s1 \break
%% 4
\switchOff
s1 \break
%% 5
\switchOn
s1 \break
%% 6
s1 \break
}
%% trumpets
combined-trumpets-I-II-III = {
\override NoteHead.color = #red
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
\switchOn
s1 \break
%% 4
\switchOff
s1 \break
%% 5
s1 \break
%% 6
s1 \break
}
combined-trumpets-I-II = {
\override NoteHead.color = #(x11-color 'orange)
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
s1 \break
%% 4
\switchOn
s1 \break
%% 5
\switchOff
s1 \break
%% 6
s1 \break
}
combined-trumpets-II-III = {
\override NoteHead.color = #yellow
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
s1 \break
%% 4
s1 \break
%% 5
s1 \break
%% 6
\switchOn
s1 \break
}
%% cors
combined-cors-I-II-III-IV = {
\override NoteHead.color = #red
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
\switchOn
s1 \break
%% 4
\switchOff
s1 \break
%% 5
s1 \break
%% 6
s1 \break
}
combined-cors-I-II = {
\override NoteHead.color = #(x11-color 'orange)
%% 1
\switchOff
\switchOn
s1 \break
%% 2
\switchOff
s1 \break
%% 3
s1 \break
%% 4
\switchOn
s1 \break
%% 5
\switchOff
s1 \break
%% 6
s1 \break
}
combined-cors-II-III = {
\override NoteHead.color = #yellow
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
s1 \break
%% 4
s1 \break
%% 5
s1 \break
%% 6
\switchOn
s1 \break
}
combined-cors-III-IV = {
\override NoteHead.color = #(x11-color 'orange)
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
s1 \break
%% 4
\switchOn
s1 \break
%% 5
\switchOff
s1 \break
%% 6
s1 \break
}
combined-cors-II-III-IV = {
\override NoteHead.color = #cyan
%% 1
\switchOff
s1 \break
%% 2
s1 \break
%% 3
s1 \break
%% 4
s1 \break
%% 5
\switchOn
s1 \break
%% 6
\switchOff
s1 \break
}
%% For divisi instruments initiate Staff-contexts for every single instrument.
%% Set `VerticalAxisGroup.details.catch-me` appropiate.
%% If those staves are part of a StaffGroup, GrandStaff, ChoirStaff or
%% PianoStaff with removed "Keep_alive_together_engraver" 'catch-me may left
%% unset.
%%
%% Initiate every desired divisi-Staff.
%% Staves meant for divisi should be labed with
%% `VerticalAxisGroup.details.combined` set to a list of positive integers,
%% representing the combined voices.
%% Set appropriate `catch-me` as well, it may be omitted as described above.
%% Apply \RemoveAllEmptyStaves to every divisi-Staff.
%%
%% While divisi-staves are alive (controlled by switchOn/Off, see above)
%% other selected staves are killed and restored when the divisi dies.
%% This relies on the values used for 'combined
%%
%% This is initiated by a call at Score-level to
%% \override VerticalAlignment.before-line-breaking = #(divisis)
%%
%% If divisis are used outside of container-contexts:
%% StaffGroup, GrandStaff, ChoirStaff or PianoStaff with removed
%% "Keep_alive_together_engraver"
%% `divisis` may get additional optional arguments like: (divisis "flutes")
%% This should ofcourse match the setted `catch-me` value.
\score {
<<
%% A Staff which should not becomes part of any divisi
\new Staff = "up"
\with {
instrumentName = "Picc"
shortInstrumentName = "picc"
}
{ \repeat unfold 48 c''8 }
%% FLUTES
%% To get divisis work outside of container-contexts one needs to set
%% `catch-me`
% \new StaffGroup
% \with {
% \override SystemStartBracket.collapse-height = 1
% \override SystemBar.collapse-height = 1
% instrumentName = \markup { \rotate #90 "FLUTES" \hspace #16 }
% shortInstrumentName = \markup { \rotate #90 "FLUTES" \hspace #16 }
% }
<<
\new Staff = "fl1"
\with {
instrumentName = "Fl 1"
shortInstrumentName = "Fl 1"
\override VerticalAxisGroup.details.catch-me = "flutes"
}
\fluteI
\new Staff = "fl2"
\with {
instrumentName = "Fl 2"
shortInstrumentName = "Fl 2"
\override VerticalAxisGroup.details.catch-me = "flutes"
}
\fluteII
\new Staff = "fl1+2"
\with {
instrumentName = "Fl 1+2"
shortInstrumentName = "Fl 1+2"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.catch-me = "flutes"
\override VerticalAxisGroup.details.combined = #'(1 2)
}
\new Voice
<<
\combined-flutes-I-II
\fluteI \fluteII
>>
>>
%% TRUMPETS
\new StaffGroup
\with {
\override SystemStartBracket.collapse-height = 1
instrumentName = \markup { \rotate #90 "TUMPETS" \hspace #16 }
shortInstrumentName = \markup { \rotate #90 "TRUMPETS" \hspace #16 }
}
<<
\new Staff = "tr1"
\with {
instrumentName = "Tr 1"
shortInstrumentName = "Tr 1"
}
\trumpetI
\new Staff = "tr2"
\with {
instrumentName = "Tr 2"
shortInstrumentName = "Tr 2"
}
\trumpetII
\new Staff = "tr3"
\with {
instrumentName = "Tr 3"
shortInstrumentName = "Tr 3"
}
\trumpetIII
\new Staff = "tr1+2+3"
\with {
instrumentName = "Tr 1+2+3"
shortInstrumentName = "Tr 1+2+3"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(1 2 3)
}
\new Voice
<<
\combined-trumpets-I-II-III
\trumpetI \trumpetII \trumpetIII
>>
\new Staff = "tr1+2"
\with {
instrumentName = "Tr 1+2"
shortInstrumentName = "Tr 1+2"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(1 2)
alignAboveContext = "tr3"
}
\new Voice
<<
\combined-trumpets-I-II
\trumpetI \trumpetII
>>
\new Staff = "tr2+3"
\with {
instrumentName = "Tr 2+3"
shortInstrumentName = "Tr 2+3"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(2 3)
alignBelowContext = "tr1+2"
}
\new Voice
<<
\combined-trumpets-II-III
\trumpetII \trumpetIII
>>
>>
%% CORS
\new StaffGroup
\with {
\override SystemStartBracket.collapse-height = 1
instrumentName = \markup { \rotate #90 "CORS" \hspace #16 }
shortInstrumentName = \markup { \rotate #90 "CORS" \hspace #16 }
}
<<
\new Staff = "c1"
\with {
instrumentName = "Cor 1"
shortInstrumentName = "Cor 1"
}
\corI
\new Staff = "c2"
\with {
instrumentName = "Cor 2"
shortInstrumentName = "Cor 2"
}
\corII
\new Staff = "c3"
\with {
instrumentName = "Cor 3"
shortInstrumentName = "Cor 3"
}
\corIII
\new Staff = "c4"
\with {
instrumentName = "Cor 4"
shortInstrumentName = "Cor 4"
}
\corIV
\new Staff = "c1+2+3+4"
\with {
instrumentName = "Cors 1+2+3+4"
shortInstrumentName = "Cors 1+2+3+4"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(1 2 3 4)
}
\new Voice
<<
\combined-cors-I-II-III-IV
\corI \corII \corIII \corIV
>>
\new Staff = "c1+2"
\with {
instrumentName = "Cors 1+2"
shortInstrumentName = "Cors 1+2"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(1 2)
alignAboveContext = "c3"
}
\new Voice
<<
\combined-cors-I-II
\corI \corII
>>
\new Staff = "c2+3"
\with {
instrumentName = "Cors 2+3"
shortInstrumentName = "Cors 2+3"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(2 3)
alignAboveContext = "c4"
}
\new Voice
<<
\combined-cors-II-III
\corII \corIII
>>
\new Staff = "c3+4"
\with {
instrumentName = "Cors 3+4"
shortInstrumentName = "Cors 3+4"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(3 4)
alignBelowContext = "c1+2"
}
\new Voice
<<
\combined-cors-III-IV
\corIII \corIV
>>
\new Staff = "c2+3+4"
\with {
instrumentName = "Cors 2+3+4"
shortInstrumentName = "Cors 2+3+4"
\RemoveAllEmptyStaves
\override VerticalAxisGroup.details.combined = #'(2 3 4)
alignBelowContext = "c1"
}
\new Voice
<<
\combined-cors-II-III-IV
\corII \corIII \corIV
>>
>>
%% A Staff which should not becomes part of any divisi
\new Staff = "bass"
\with {
instrumentName = "Bass"
shortInstrumentName = "Bass"
}
{ \clef bass \repeat unfold 6 c1 }
>>
\layout {
\context {
\Score
\override VerticalAlignment.before-line-breaking =
%#(divisis "flutes" "trumpets" "cors")
%#(divisis)
#(divisis "flutes")
}
}
}
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