Re: Scaled grace

[Urs Liska]

Am 21.03.2017 um 11:04 schrieb Urs Liska:
>
> Am 21.03.2017 um 10:46 schrieb Malte Meyn:
>> (By the way: I think that the way LilyPond handles it (using “grace” and
>> “real time”) is pretty good but not perfect. \grace only needs grace
>> time but \afterGrace needs real time for vertical alignment (but not for
>> input of the notes)—it would be nice to have 1. \grace before barlines
>> and 2. grace/afterGrace notes that are vertically aligned indepentently
>> from real time notes if you don’t want them between the real notes. And
>> maybe 3. some function that helps to align f. e. 7 grace notes in the
>> right and 6 in the left hand without having to scale them by hand -> a
>> function that takes notes and scales them so that they get a given total
>> length. Maybe if I find some time I’ll make some sketches that
>> illustrate 2. and pseudo code that illustrates 3.)
>
> Something like this?
>
> \version "2.19.54"
>
> scaledGrace =
> #(define-music-function (duration mus)(fraction? ly:music?)
>    (let* ((real-len (ly:music-length mus))
>          (dur (ly:make-moment (/ (car duration) (cdr duration))))
>          (ratio-mom (ly:moment-div dur real-len))
>          (ratio (cons (ly:moment-main-numerator ratio-mom)
>                   (ly:moment-main-denominator ratio-mom))))
>      #{
>        \grace \scaleDurations #ratio #mus
>      #}))
>
> {
>   <<
>     {
>       c''2
>       \scaledGrace 1/4 {
>         c''16 [ d'' e'' ]

The effect is better with this as the upper grace group:
c''16 [ d'' e'' d'' e'' ]

>       }
>       f''2
>     }
>     \\
>     {
>       c'2
>       \scaledGrace 1/4 {
>         c'16 b c' d' e'
>       }
>       f'2
>     }
>   >>
> }
>
>
>
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