Re: [PATCH] coloratio, black mensural notation

[Valentin Villenave]

On Mon, Nov 8, 2010 at 10:06 PM, Benkő Pál <address@hidden> wrote:
> hi list,

Greetings Pál,
[CCing Werner "the glyph guy" Lemberg]

> the attached patch adds noteheads needed for black mensural notation (BMN)
> and coloratio in white mensural notation (WMN).
>
> note that it's just the noteheads: in both BMN and coloratio sections
> in WMN a fourth note looks like a flagged half note.

Werner, do you want me to upload this patch on Rietveld (or possibly
to the bug tracker)?

> I could reach this look by the following functions:
>
> #(define (nota-colorata music)
>  (let (
>    (es (ly:music-property music 'elements))
>    (name (ly:music-property music 'name))
>  )
>   (if (equal? name 'EventChord)
>    (let* ((note (first es))
>           (dur (ly:music-property note 'duration))
>           (dl (ly:duration-log dur))
>         )
>     (if (> dl 1)
>      (set! music (shift-duration-log
>                   (ly:music-compress music (ly:make-moment 2 1))
>                   1 0)))))
>   music))
>
> notaColorata =
> #(define-music-function (parser location mus) (ly:music?)
>  (music-map nota-colorata mus))
>
> I hope there is a better solution.

I'm not sure exactly what you're trying to achieve (I know nothing
about mensural notation), but is changing the rhythm a desired
side-effect? Whenever I want a black note head, I use something much
simpler (but arguably hackish):

#(define (nota-colorata music)
 (let ((es (ly:music-property music 'elements))
   (name (ly:music-property music 'name)) )
  (if (equal? name 'EventChord)
   (let* ((note (first es)))
      (set! (ly:music-property note 'tweaks)
            (acons 'duration-log 4
                   (ly:music-property note 'tweaks)))))
  music))

> the next step is using all this;
> I've tried adding a new note head style - I believe this
> is right, considering colored - uncolored changes in
> WMN, but I may well be wrong.
>
> I also have support for these in ligatures (notes can
> be colored/uncolored independently - even the two notes
> of a flexa can have different color), but I'd like to
> sort out the above issues first.

Good luck with your work, I'm sure others will have more useful
comments to make than me!

Cheers,
Valentin.

black.patch
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