Re: Bad clef change collision when alternating piano staves

[Ophir Lifshitz]

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