Re: Attachment of beam to stems

[Urs Liska]

Hi Torsten,

thank you for the suggestion.

It was not *quite* was I need because I realized (only after sending the 
question) that - since this is from engraving with types - the beams are 
always printed at an absolute position.

But your approach of overlaying brought me on the right track, and I 
could use Beam.positions instead. The attached file wraps this in a 
function that properly handles different durations and slopes (by 
determining the relation of the pitches).

What I'll want to still do is change the interface to accept *music* 
instead of pitches:

  \centerBeam gis'16 [ e' ]

but I have to leave the computer for now.

Best
Urs

Am 12.05.2018 um 12:04 schrieb Torsten Hämmerle:
> Hi Urs,
>
> This turned out to be a bit tricky, because stems and beams are strictly
> coupled together in a way that the outer beams will always start/end at the
> end of stems. And vice versa: Changes to beam positioning will always bring
> along stem length changes.
> Beam positioning with all the quanting issues (sit/straddle/hang...) doesn't
> make it easier, either.
>
> Therefore, the only solution I could come up with is to use parallel
> contexts: one for the "ordinary" stems and another for the somewhat
> squeezed-in-between knee-gap beam.
> But, after all, you get away without having to define your own stencil :)
>
> (1) ignore note collisions
> (2) set auto-knee-gap to 0
> (3) empty all the Stem details
> (4) use crotchets for the "regular" stems, but scaled to semiquavers for the
> right timing/spacing
> (5) initiate a new new Voice for the parallel knee-gap-music to prevent
> stems from being mixed up.
>
> %%%%
> {
>    \override NoteColumn.ignore-collision = ##t
>    \once\override Staff.Beam.auto-knee-gap = #0
>    \once\override Staff.Stem.details = #'()
>    << { gis'4*1/4 e'' } \new Voice { gis'16[ e''] } >>
>    \revert NoteColumn.ignore-collision
> }
> %%%%
>
> <http://lilypond.1069038.n5.nabble.com/file/t3887/beam-attachment.png>
>
> Final adjustments to the beam could be made by using extra-offset.
>
> HTH,
> Torsten
>
>
>
> --
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>
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samples.png
Description: PNG image

center-beam.ily
Description: Text document

center-beam.pdf
Description: Adobe PDF document