Re: stem length in staff space

[Thomas Morley]

2017-03-14 12:18 GMT+01:00 Klaus Rettinghaus
<address@hidden>:
> Ok, here's another try:
> (Version 2.19.56)
>
> {
> \override NoteHead.transparent = ##t
> e'
> \tweak Stem.length #3 e'
> \tweak Stem.length #6 e'
> }
>
> The normal stem of an e' has the length of approximately 3 staff spaces. So
> I tweak the stem length to 3 (staff spaces) to match the previous. But it
> turns out to be only half as long. I have to tweak it to #6 to match a
> length of 3 staff spaces.
> Where I'am thinking wrong?
>
> Regards
> Klaus



I agree with Klaus, Stem.length is measured in half-staff-space, see

{
%% for convenience
  \cadenzaOn
  \hide NoteHead
  \override NoteHead.stem-attachment = #'(0 . 0)

%  \override Stem.after-line-breaking =
%  #(lambda (grob)
%    (format #t "\nstem-length-----------~a" (ly:grob-property grob 'length)))

  e'4
  \tweak Stem.length #0 e'
  \tweak Stem.length #1 e'
  \tweak Stem.length #2 e'
  \tweak Stem.length #3 e'
  \tweak Stem.length #4 e'
  \tweak Stem.length #5 e'
  \tweak Stem.length #6 e'
  \tweak Stem.length #7 e'
}

The IR is generated automatically and I've found the length-property
in lyric-syllable-interface as well. Where the description puzzles me
even more.
Though, no time to research further yet.
Have to run for my regular job...

Cheers,
  Harm