Re: stacking of figured bass elements

[Jean Abou Samra]

Le 13/06/2022 à 07:31, Werner LEMBERG a écrit :
> > > I see that the function also listens to `basic-distance` (probably
> > > from `VerticalAxisGroup`), but I wasn't able to trigger it – most
> > > probably, this code part is not specific to figured bass.
> > I think this should do (I can elaborate when I have more time):
> >
> > \version "2.22.2"
> >
> > \figures {
> >    \override BassFigureLine.staff-staff-spacing =
> >                #'((basic-distance . 0)
> >                   (minimum-distance . 1.6)
> >                   (padding . -inf.0)
> >                   (stretchability . 0))
> >    < f I \markup r >
> > }
> Aah, not `VerticalAxisGroup` but `BassFigureLine` it is!  Excellent,
> thanks!
>
> One question remains, however: Why `staff-staff-spacing` and not
> `nonstaff-nonstaff-spacing`?  Or to ask the question differently: How
> can I recognize the difference between 'staff' and 'nonstaff' material
> in general?


Everything with a staff-affinity is "nonstaff", all
the rest is "staff". (See Page_layout_problem::is_spaceable
in lily/page-layout-problem.cc.)

By the way, here is a better snippet:

\version "2.22.2"

\figures {
  \override BassFigureLine.staff-staff-spacing =
    #'((minimum-distance . 1.6)
       (padding . -inf.0))
  < f I \markup r >
}

Giving values for basic-distance and stretchability was
in fact pointless: since BassFigureAlignment uses
ly:align-interface::align-to-minimum-distances,
it only takes minimum-distance and padding into account.

Best,
Jean