Re: typesetting Christian Wolff Excersize

[ole]

Hi Lukas,

Wow, thanks a lot for this very quick solution!!

The parantheses are not really necessary for me,

thanks again!

ole

> Am 31.10.2021 um 19:54 schrieb Lukas-Fabian Moser <lfm@gmx.de>:
> 
> Hi Ole,
> 
> Am 31.10.21 um 19:13 schrieb ole:
>> I've already removed the stem-engraver in the \layout part (to get the 
>> quarter notes without stem)
> 
> I just want to point out that removing the stem engraver removes the stems 
> "for good". Often, one wants to remove the stems but wants to be able to 
> switch them on again at some later point in the score; in this case, it's 
> better to just do \omit Stem (in \layout {} or in your music) which can be 
> undone.
> 
> (Strictly speaking, removing the engraver does more than just \omitting the 
> object, which in turn is more than just \hide'ing it.)
> 
>> Does someone have a solution for that particular spot by chance, otherwise I 
>> thing about using Inkscape..?
> 
> One possibility would be to abuse stems for this. (This does not work if the 
> Stem engraver is removed, see above.)
> 
> A first approximation:
> 
> \version "2.22"
> 
> connectArrowStem =
> #(define-music-function (dir) (ly:dir?)
>    #{
>      \once {
>        \undo \omit Stem % in case someone \omit'ted them :-)
>        \override Stem.length-fraction = 0
>        \override Stem.X-offset = 0.65
>        \override Stem.thickness = 2
>        \override Stem.stencil =
>        #(grob-transformer
>          'stencil
>          (lambda (grob stem)
>            (let* ((Y-ext (ly:stencil-extent stem Y))
>                   (Y-pos (interval-index Y-ext (* dir 0.3))))
>              (ly:stencil-add
>               stem
>               (ly:stencil-translate-axis
>                (grob-interpret-markup grob (markup #:arrow-head Y dir #f))
>                Y-pos Y)))))
>      }
>    #})
> 
> {
>   \omit Stem
>   c'4 d' e'4
>   \connectArrowStem #UP <c' g''>4
>   \connectArrowStem #DOWN <b' g''>
> }
> 
> This still causes problems if the two notes are too close together (because 
> LilyPond still creates a stem protruding over one of the notes).
> 
> I also didn't implement the parentheses yet.
> 
> Lukas
> 
>