Hi Stefano,
thanks a lot for researching this issue! Sometimes I also noticed "rebel
ties", but I didn't identified it as an EE bug. So your research file
looks meaningful.
I hope to have a deeper look into it next week.
Best
Jan-Peter
Am 26.02.2018 um 15:26 schrieb Stefano Troncaro:
Hi everyone! I tried to isolate the issue with Tie directions that I
posted earlier and I'm fairly confident I've stumbled upon a bug.
Look at the output of this snippet (Sorry for the length, I made it as
short as I could)
\version "2.19.80" \language "english" \include "oll-core/package.ily"
\loadPackage edition-engraver
\addEdition test
\consistToContexts #edition-engraver Voice
\layout { \context { \Score \time 6/4
\omit TimeSignature \omit Clef } } forceRebelTie =
#(define-music-function (dir) (ly:dir?)
#{
\override Tie.before-line-breaking =
#(lambda (grob)
(ly:grob-set-property! grob 'direction dir)) #} )
ovA =\once \tieDown ovB =\once \override Tie.direction = #DOWN ovC =\once \forceRebelTie #DOWN formA =\new Staff \with { instrumentName ="All V1" } << \new Voice \relative c''{ \voiceOne b~ 4 4~ 4 4~ 4} >> formB =\new Staff \with
{ instrumentName ="1V V1" } << \new Voice \relative c''{ b~ \voiceOne 4 \oneVoice 4~ \voiceOne 4 \oneVoice 4~ \voiceOne 4 } >> controlA =\new Staff \with { instrumentName ="No EE" } << \new Voice \relative c''{
\voiceOne \ovA b~ 4 4~ 4 4~ 4 } >> controlB =\new Staff \with { instrumentName ="No EE" } << \new Voice \relative c''{ \voiceOne \ovB b~ 4 4~ 4 4~ 4 } >> controlC =\new Staff \with { instrumentName ="No EE" }
<< \new Voice \relative c''{ \voiceOne \ovC b~ 4 4~ 4 4~ 4 } >> \markup "Results with \\tieDown" \editionMod test1 0 Voice.A\ovA \editionMod test1 0 Voice.B\ovA \score { \new StaffGroup << \formA \formB \controlA >> } \markup
"Results with \\override Tie.direction" \editionMod test1 0 Voice.D\ovB \editionMod test1 0 Voice.E\ovB \score { \new StaffGroup << \formA \formB \controlB >> } \markup "Results with ly:grob-set-property!" \editionMod test1 0
Voice.G\ovC \editionMod test1 0 Voice.H\ovC \score { \new StaffGroup << \formA \formB \controlC >> } \markup "No overrides (default behavior for comparison)" \score { \new StaffGroup << \formA \formB >> }
When \voiceOne is in full effect, both \once \tieDown and\once
\override Tie.direction seem to have a permanent effect that kicks in
after the moment they are used, which is exactly the opposite to what
they should do (take effect only in the moment they are called and
revert to the previous behavior after). This is very clear when you
compare the All V1 Staff with the No EE Staff: the All V1 behaves in
the exact opposite way.
I have absolutely no idea about why this may be happening, but I'm
certain that one should expect the EE to achieve the same results that
manually writing the code in the desired place and moment would.
Hopefully Jan-Peter or someone more knowledgeable than I can look into it!
I hope this "research" can be useful!
Stéfano
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