Brilliant, Paul. It isn't as easy as I'd hoped, but this works and is really
minimally difficult for me to use. I used 1.25 and -1.25 as values and it is
certainly close enough that I can't complain. This helps a *lot*.
Best regards,
Arle
On 2012 Dec 11, at 21:05 , Paul Morris wrote:
> Hi Arle,
>
> On Dec 11, 2012, at 2:37 PM, Arle Lommel <fene...@gmail.com> wrote:
>
>> I've been looking for how to tweak the direction of noteheads within chords.
>> I've got a few instances where Lilypond’s default isn't as clear as when I
>> flip the direction of some of the noteheads. I've searched the repository
>> and tried various tweaks using direction, but nothing seems to matter. I'm
>> sure it's easy, but I can't find it.
>>
>> As a minimal example, consider this chord:
>>
>> <e fis ais cis>4
>>
>> The default is to have the e face left and the other heads face right, but
>> in the piece I am reproducing the e faces right and the fis faces left.
>> Doing it this way, as per the old engraver, increases the white space
>> between the noteheads and increases legibility.
>>
>> Any guidance on how to achieve this? If there is an easy way, I would
>> suggest adding it to the LSR as well, since this is a basic sort of tweak
>> that others must surely need, but which doesn't seem to be easy to find.
>
> I had trouble figuring this out earlier this year and David Nalesnik helped
> me out with the code below.[1] I have had it on my list to add it to the LSR
> (while giving proper credit to David N.), as it is something that is not easy
> to figure out on your own.
>
> (I think the fully accurate horizontal offsets should be 1.251178 and
> -1.251178 rather than 1.3 or -1.3 for regular sized noteheads. They would be
> a little larger for whole note note heads, but I don't know those values at
> the moment.)
>
> Let me know if you have questions about how it works.
>
> HTH,
> -Paul
>
>
> #(define ((shift offsets) grob)
> (let ((note-heads (ly:grob-array->list (ly:grob-object grob 'note-heads))))
> (for-each
> (lambda (p q) (set! (ly:grob-property p 'X-offset) q))
> note-heads offsets)))
>
> displaceHeads =
> #(define-music-function (parser location offsets) (list?)
> #{
> \once \override NoteColumn #'before-line-breaking = #(shift offsets)
> #}
> )
>
> theMusic = {
> \displaceHeads #'(0 0 1.3)
> <c' e' g' >4
>
> \displaceHeads #'(0 1.3 1.3)
> <d' f' a'>
>
> \displaceHeads #'(0 1.3 1.3)
> <d' f' a'>
>
> \displaceHeads #'(0 0 1.3)
> < c' e' g'>
>
> \displaceHeads #'(-1.3 -1.3 0)
> < c'' e'' g''>
>
> \displaceHeads #'(-1.3 -1.3 0)
> < c''' e''' g'''>
>
> \displaceHeads #'(0 0 1.3)
> < c e g>
>
> \displaceHeads #'(0 -1.3 0)
> < c'' e'' g''>
>
> \displaceHeads #'(0 0 -1.3)
> < c'' e'' g''>
> }
>
> \new Staff {
> \theMusic
> }
>
> [1] http://lists.gnu.org/archive/html/lilypond-user/2012-12/msg00186.html
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