input/regression/beam-concave-chord.ly

   1 \version "2.12.0"
   2 \header {
   3 texidoc = "Concave beaming works for chords as well as monophonic
   4 music.
   5 "
   6 }
   7
   8 morgenliedBeam = \relative c'' \new Voice {
   9   \time 3/8
  10   % morgenlied
  11   c16 b c e g <e b'> |
  12   \stemUp
  13   c16 b c e g <e b'> |
  14 }
  15
  16 rachmaninovBeams = \relative c' \new Voice {
  17   \voiceOne
  18   \time 4/4
  19   \key c \minor
  20   <c' e c'>8[ <g c g'> <c f> <ees, ees'>] ~
  21   <ees ees'>8[ <c c'> <des des'> <d d'>]
  22 }
  23
  24 horizontalBeams = {
  25   % todo.
  26 }
  27
  28 nonHorizontalBeams = {
  29   \morgenliedBeam
  30   \rachmaninovBeams
  31 }
  32 \layout {
  33   ragged-right = ##t
  34 }
  35
  36 % cut & paste from beam-concave.ly
  37
  38 #(define (<> x y) (not (= x  y)))
  39 mustBeHorizontal = {
  40   \override Staff.Beam #'positions =
  41     #(ly:make-simple-closure
  42       (ly:make-simple-closure
  43        (append
  44         (list chain-grob-member-functions `(,cons 0 0))
  45         (check-slope-callbacks =))))
  46 }
  47 mustNotBeHorizontal = {
  48   \override Staff.Beam #'positions =
  49     #(ly:make-simple-closure
  50       (ly:make-simple-closure
  51        (append
  52         (list chain-grob-member-functions `(,cons 0 0))
  53         (check-slope-callbacks <>))))
  54 }
  55
  56 \new Voice {
  57   \mustBeHorizontal
  58   R1
  59   \horizontalBeams
  60   \mustNotBeHorizontal
  61   \nonHorizontalBeams
  62 }