Hi Harm,
On Wed, Dec 12, 2012 at 6:24 PM, Thomas Morley
<[email protected]> wrote:
> 2012/12/11 Paul Morris <[email protected]>:
>> Below is a revised version
> [...]
>
> Hi Paul,
>
> I had a look at the LSR-snippet
> http://lsr.dsi.unimi.it/LSR/Item?id=861
>
> It's no problem to make it work with 2.14.2 just adding a $-sign
> before offsets in the music-function.
>
> But you will have noticed that after applying the function an
> additional override for 'stem-attachment is necessary in many cases.
> You should show how to do this. At least for some examples.
>
> In general I'd prefer to have a more automated way for offsetting the
> NoteHeads.
> The hardcoded value of 1.251178 will change for different NoteHeads and
> styles.
>
I saw that hardcoded value and wrote the following code which arrives
at 1.251178 (though that value uses only half the stem's extent).
Haven't tried it with other heads/styles.
#(define ((shift offsets) grob)
(let* ((note-heads (ly:grob-array->list (ly:grob-object grob 'note-heads)))
(stem (ly:grob-object grob 'stem))
(stem-ext (ly:grob-property stem 'X-extent)))
(for-each
(lambda (p q)
(let ((head-ext (interval-length (ly:grob-property p 'X-extent))))
(ly:grob-translate-axis! p (* q (- head-ext (cdr stem-ext))) X)))
note-heads offsets)))
displaceHeads =
#(define-music-function (parser location offsets) (list?)
#{
\once \override NoteColumn #'before-line-breaking = #(shift offsets)
#}
)
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