Re: Scheme: get current beam-thickness

[Thomas Morley]

Am Sa., 25. Jan. 2020 um 19:40 Uhr schrieb David Stephen Grant
<address@hidden>:
>
> I'm trying to create a custom flag stencil, and would like to get the current 
> _beam_ thickness. As a first step, in the following example I would expect 
> 0.5, then 1, to be printed to the console. Is there a way of doing this?
>
> Thanks,
> David
>
> \version "2.19.83"
> #(define (my-flag)
>   (lambda (grob)
>     (format #t "~a"
>       ;;; GET THE CURRENT BEAM-THICKNESS
>       )
>     empty-stencil))
> {
>   \override Flag.stencil = #(my-flag)
>   \override Beam.beam-thickness = #0.5
>   c'8 r8
>   \override Beam.beam-thickness = #1.0
>   c'8 r8
> }

Hi,

your example prints no Beams, actually no Beam-grob is created.
Thus any override for Beam will not find the grob to apply, in
consequence you can't read the grob-properties of a non-existing grob
from a different grob.

May I ask how your Flag will look? We have some code implemented in
the source which may help...


Cheers,
  Harm