Re: Bad clef change collision when alternating piano staves

[Malte Meyn]

Hi Ophir,

this bug hasn’t been fixed yet but there’s a cleaner solution than 
tweaking X-offsets and X-extents: Temporarily use another voice.

Cheers,
Malte

\version "2.18.2"

\new PianoStaff <<
  \new Staff = "RH" \relative a' {
    \clef treble
    <<
      \new Voice {
        s2
        a8[ b c d]
      }
      \new Voice {
        a8
        \change Staff = "LH" \clef treble a_1
        \change Staff = "RH"              a
        \change Staff = "LH"              a_2
        \clef bass
        cis,, d e f
      }
    >>
    e''2
  }
  \new Staff = "LH" \relative a, {
    \clef bass
    a8 s2..
    e'2
  }
>>

Am 09.10.2017 um 05:23 schrieb Ophir Lifshitz:
> Hello,
>
> Can someone please triage this bug?
>
> Thanks again,
> Ophir
>
> On Sun, Jan 31, 2016 at 4:57 PM, Ophir Lifshitz <address@hidden>
> wrote:
>
> > Hello,
> >
> > Would it be possible to triage this bug I reported 3 months ago?
> >
> > Thanks,
> > Ophir
> >
> > On Fri, Jan 1, 2016 at 10:03 AM, Ophir Lifshitz <
> > address@hidden> wrote:
> >
> > > Hello again,
> > >
> > > Has anyone been able to triage this bug yet?
> > >
> > > Thanks,
> > > Ophir
> > >
> > > On Wed, Oct 28, 2015 at 11:31 AM, Ophir Lifshitz <
> > > address@hidden> wrote:
> > >
> > > > I was browsing through recent bugs on the new tracker and found this
> > > > one: http://sourceforge.net/p/testlilyissues/issues/4642/
> > > >
> > > > I wonder whether it is related?
> > > >
> > > > Ophir
> > > >
> > > > On Tue, Oct 27, 2015 at 6:15 PM, Ophir Lifshitz <
> > > > address@hidden> wrote:
> > > >
> > > > > And so in that case, probably something like \hideNotes r ...
> > > > > \unHideNotes will be sufficient.
> > > > >
> > > > > Ophir
> > > > >
> > > > > On Tue, Oct 27, 2015 at 6:10 PM, Ophir Lifshitz <
> > > > > address@hidden> wrote:
> > > > >
> > > > > > Hello again,
> > > > > >
> > > > > > Yes, thank you Pierre. I believe that will work temporarily, but I'm
> > > > > > still mostly convinced it's a bug that needs to be fixed.
> > > > > >
> > > > > > For example, change the space s4. near the bottom of the file between
> > > > > > three eighth rests r r r (clef change is – mostly – properly spaced)
> > > > > > and two rests plus a space r r s (collision). It seems that Lilypond
> > > > > > can't detect the RH's note's presence in the 4th position of the LH staff,
> > > > > > and it only detects the presence of a LH note/rest starting somewhere in
> > > > > > the 4th position.
> > > > > >
> > > > > > Ophir
> > > > > >
> > > > > > On Tue, Oct 27, 2015 at 6:01 PM, Pierre Perol-Schneider <
> > > > > > address@hidden> wrote:
> > > > > >
> > > > > > > Oops, sorry, too fast reading...
> > > > > > >
> > > > > > > How about :
> > > > > > >
> > > > > > > \version "2.19.22"
> > > > > > > \new PianoStaff <<
> > > > > > >      \new Staff = "RH" \relative a' {
> > > > > > >          \clef treble
> > > > > > >          a8
> > > > > > >          \change Staff = "LH" \clef treble a_1
> > > > > > >          \change Staff = "RH"              a
> > > > > > >          \change Staff = "LH"
> > > > > > >          \tweak X-extent #'(0 . -2)
> > > > > > >          \tweak X-offset #-3.3 a_2
> > > > > > >          \clef bass
> > > > > > >          \change Staff = "RH"
> > > > > > >          \tweak X-extent #'(-7 . 1.3) a
> > > > > > >      }
> > > > > > >      \new Staff = "LH" \relative a, {
> > > > > > >          \clef bass
> > > > > > >          a8 s4. cis8_3
> > > > > > >      }
> > > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > 2015-10-27 22:37 GMT+01:00 Ophir Lifshitz <address@hidden
> > > > > > > > :
> > > > > > >
> > > > > > > > Hi Pierre,
> > > > > > > >
> > > > > > > > I'm afraid that override only makes the issue worse by shifting the
> > > > > > > > clef left. I might have been unclear, but the clef change belongs after
> > > > > > > > note 2 and directly before the sharped note 3, and not in the small space
> > > > > > > > between notes 1 and 2. Shifting it left makes it look like note 2 is
> > > > > > > > notated in bass clef, but it is not. Ultimately more space is needed on the
> > > > > > > > staff between notes 2 and 3 to fit the bass clef before note 3.
> > > > > > > >
> > > > > > > > Ophir
> > > > > > > >
> > > > > > > > On Tue, Oct 27, 2015 at 5:28 PM, Pierre Perol-Schneider <
> > > > > > > > address@hidden> wrote:
> > > > > > > >
> > > > > > > > > Hi Ophir,
> > > > > > > > >
> > > > > > > > > Try :
> > > > > > > > > \once\override Staff.Clef.X-extent = #'(0 . 3.5) \clef bass
> > > > > > > > >
> > > > > > > > > Cheers,
> > > > > > > > > ~Pierre
> > > > > > > > >
> > > > > > > > > 2015-10-27 22:05 GMT+01:00 Ophir Lifshitz <
> > > > > > > > > address@hidden>:
> > > > > > > > >
> > > > > > > > > > Hello all,
> > > > > > > > > >
> > > > > > > > > > I believe there is a bug in making space for clef changes. You can
> > > > > > > > > > find the
> > > > > > > > > > MWE here: http://lilybin.com/gs2oks/7
> > > > > > > > > >
> > > > > > > > > > The notes labeled 1 and 2 on the lower LH staff are both notated
> > > > > > > > > > in treble
> > > > > > > > > > clef. But because space wasn't made for the bass clef change, the
> > > > > > > > > > bass clef
> > > > > > > > > > misleadingly appears slightly before note 2. I would have instead
> > > > > > > > > > expected
> > > > > > > > > > to see a lot of space made between notes 2 and 3 where the clef
> > > > > > > > > > can fit
> > > > > > > > > > properly. The clef change before note 1 shows that Lilypond can
> > > > > > > > > > indeed make
> > > > > > > > > > space for clef changes.
> > > > > > > > > >
> > > > > > > > > > If not a bug, what is the best way to fix the collision?
> > > > > > > > > >
> > > > > > > > > > Thanks in advance,
> > > > > > > > > > Ophir
> > > > > > > > > >
> > > > > > > > > > P.S. The MWE was gradually simplified (1 <
> > > > > > > > > > http://lilybin.com/gs2oks/1> 2
> > > > > > > > > > <http://lilybin.com/gs2oks/2> 3 <http://lilybin.com/gs2oks/3> 4
> > > > > > > > > > <http://lilybin.com/gs2oks/4> current <http://lilybin.com/gs2oks/7>)
> > > > > > > > > > in
> > > > > > > > > > case anyone is curious for the source
> > > > > > > > > > <https://www.youtube.com/watch?v=3Dw1Huh_Tfg&feature=
> > > > > > > > > > youtu.be&t=2m51s>.
> > > > > > > > > > Also attached are the source and an image in case of linkrot.
> > > > > > > > > >
> > > > > > > > > > _______________________________________________
> > > > > > > > > > bug-lilypond mailing list
> > > > > > > > > > address@hidden
> > > > > > > > > > https://lists.gnu.org/mailman/listinfo/bug-lilypond
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