2014-10-24 13:57 GMT+02:00 Peter Crighton <[email protected]>:
> 2014-10-24 11:05 GMT+02:00 Robin Bannister <[email protected]>:
>
>>
>> The source file music-functions.scm defines
>> music-map
>> which you can use for this:
>>
>>
>> bgr = #(define-music-function (parser location music) (ly:music?)
>> (music-map (lambda (note)
>> #{
>> \tweak NoteHead.font-size #-2
>> \tweak Accidental.font-size #-2
>> #note
>> #})
>> music ))
>>
>>
>> There is an advanced example in the regression tests:
>> http://www.lilypond.org/doc/v2.18/input/regression/
>> collated-files.html#music-map.ly
>
>
> Thanks a lot, Robin! I wouldn’t have thought it would be this easy …
>
Although I now came upon the following situation with rests:
\version "2.19.13"
bgr = #(define-music-function
(parser location music)
(ly:music?)
(music-map (lambda (note)
#{
\tweak NoteHead.font-size #-2
\tweak Accidental.font-size #-2
#note
#})
music))
\new Voice <<
\relative c' {
c4 d r f
}
\relative c' \bgr {
e4 f r a
}
>>
I get these warnings:
/home/peter/bgr.ly:21:16: warning: Two simultaneous rest events, junking
this one
\relative c'
\bgr {
/home/peter/bgr.ly:18:10: warning: Previous rest event here
c4 d
r f
Although it doesn’t seem to affect the output, it is still not desired
behaviour, and I don’t know why the \bgr function causes it.
Any ideas?
>
> But maybe this could be better documented? I never would have thought of
> looking for it in the regression tests (in fact I didn’t even know about
> them).
> Are there other places to learn about Scheme in LilyPond than the Scheme
> tutorial?
>
--
Peter Crighton | Musician & Music Engraver based in Mainz, Germany
http://www.petercrighton.de
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