Re: Adding durations (for \after)

[Aaron Hill]

On 2022-11-11 6:37 am, Joel C. Salomon wrote:
> can
>
>     r8 es \duration_subtract{2.}{8} f2 …
>
> be made to work?  (With whatever syntax.)
>
> Similarly, I have music that would benefit from:
>
>     dyn_part = {
>       % \p at start, \f at third bar, \p at second-to last bar
>       <>\p
>       \after 1*2 \f
>       \after \duration_subtract {\skip \mus_part} {1*2} \p
>       \skip \mus_part
>     }

Is this useful?

%%%%
durations =
#(define-scheme-function
  (op left right)
  ((symbol? 'add) duration-or-music? duration-or-music?)
  (make-duration-of-length
    (apply
      (case op
        ((add) ly:moment-add)
        ((subtract) ly:moment-sub))
      (map
        (lambda (x)
          (if (ly:duration? x)
            (ly:duration-length x)
            (ly:music-length x)))
        (list left right)))))

fiz = { 4 4 }
baz = { 2 }
buz = { \tuplet 3/2 { 8 8 } }

\after
  \durations subtract
    \durations \fiz \baz
    \buz
  { \voiceTwo \buz }
  { \fiz \baz }
%%%%


-- Aaron Hill

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