Re: Bad clef change collision when alternating piano staves

[Ophir Lifshitz]

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
>>>>
>>>>
>>>
>>
>