Re: Add a procedure to add slashes to Beams and straight Flags (issue 562550043 by address@hidden)

[lilypond]

Here’s some test music:

\version "2.21.0"
\language "deutsch"

\relative {
  %%% looks better than 1/1 IMHO:
  \override Beam.details.slash-gradient = 3/4

  %%% default = 1 good for most, but not for some short stems (m. 3, m.
6)
  %\override Beam.details.slash-stem-part = 0.6

  %%% has complicated name and it’s not clear why y has to be larger
than x
  %%% maybe better “slash-overshoot”?
  \override Beam.details.slash-x-y-over-shoot = #'(0.3 . 0.6)

  \acciaccatura { c''16 d } e2
  \acciaccatura { c16 d e f } e2
  \acciaccatura { c16 d e f g a } e2
  \acciaccatura { c16 h } e2
  \acciaccatura { c16 h a g } e'2
  \acciaccatura { c16 h a g f e } e'2

  \acciaccatura { c8 d } e2
  \acciaccatura { c8 d e f } e2
  \acciaccatura { c8 d e f g a } e2
  \acciaccatura { c8 h } e2
  \acciaccatura { c8 h a g } e'2
  \acciaccatura { c8 h a g f e } e'2

  \acciaccatura { c32 d } e2
  \acciaccatura { c32 d e f } e2
  \acciaccatura { c32 d e f g a } e2
  \acciaccatura { c32 h } e2
  \acciaccatura { c32 h a g } e'2
  \acciaccatura { c32 h a g f e } e'2
}



https://codereview.appspot.com/562550043/diff/564540043/ly/grace-init.ly
File ly/grace-init.ly (right):

https://codereview.appspot.com/562550043/diff/564540043/ly/grace-init.ly#newcode24
ly/grace-init.ly:24: \temporary \override Flag.stroke-style = "grace"
If we have \slashedBeam, we might want another shortcut \slashedFlag.

https://codereview.appspot.com/562550043/diff/564540043/scm/define-grobs.scm
File scm/define-grobs.scm (right):

https://codereview.appspot.com/562550043/diff/564540043/scm/define-grobs.scm#newcode408
scm/define-grobs.scm:408: (slash-stem-part . 1)
It’s not that easy in some cases, see example code below.

https://codereview.appspot.com/562550043/diff/564540043/scm/define-grobs.scm#newcode409
scm/define-grobs.scm:409: (slash-gradient . (1 . 2))
IMHO that’s to steep, I’d prefer something like '(3 . 4)

https://codereview.appspot.com/562550043/diff/564540043/scm/define-grobs.scm#newcode410
scm/define-grobs.scm:410: (slash-x-y-over-shoot . (0.4 . 0.8))
I don’t really understand how this works: Why does one need a so much
larger y value? The result doesn’t look like the slash sticks out
further at the top than at the left side.

Also, that’s a really complicated name, how about something simpler
(maybe slash-overshoot)?

https://codereview.appspot.com/562550043/