Thank you so much!
-Ahanu
On Sun, Jan 29, 2023, 20:36 Jean Abou Samra <j...@abou-samra.fr> wrote:
> On 30/01/2023 02:20, Ahanu Banerjee wrote:
> > When I attempt to change the "direction" property of a slur, whether
> that is with \tweak or \override, I cannot set the direction to neutral
> (0). UP (1) and DOWN (-1) work fine, but when setting to 0, I get the
> following error:
> >
> > "Assertion failed: d, file
> /home/lily/lilypond-2.24.0/release/binaries/mingw/lilypond/lilypond-2.24.0/flower/include/drul-array.hh,
> line 56
> > Exited with return code 3."
> >
> > This is necessary for a function I am creating; Slur.direction has
> already been set to UP or DOWN earlier in the document, and I need to
> temporarily set it to neutral while also changing its color. (\once
> \slurNeutral is not practical here)
> >
> > Below is example code that generates the error:
> >
> > \version "2.24"
> > \language "english"
> > { c' d' \tweak Slur.direction #0 ( e' ) c' }
> >
> > Any suggestions?
>
>
> You can see with
>
> \void \displayLilyMusic \slurNeutral
>
>
> that \slurNeutral is not equivalent to \override Slur.direction = #0,
> but \revert Slur.direction, which reverts Slur.direction to its default
> value #ly:slur::calc-direction. So you want
>
> \version "2.24.0"
>
>
> \language "english"
> { c' d' \tweak Slur.direction #ly:slur::calc-direction ( e' ) c' }
>
>
> Jean
>
>
