Re: Slur collision detection and resolution works for sharp symbol but fails for flat symbol

[Aaron Hill]

On 2018-05-27 06:29, Jürgen Reuter wrote:
> Looks like slur collision detection and resolution (the slur is moved
> upwards) works fine for sharp accidentals, but is ignored for flat
> accidentals.
>
> Lily-Code (here tested on current lilybin.com, but seems to be
> reproducible in all lily versions of the last couple of years, hence
> it's probably not a recent regression):
>
> % LilyBin
> \score{
>     {
>         \override Stem.direction = #UP
>         \override Slur.direction = #UP
>         a'( g'') a'( g'')
>         a'( ges'') a'( gis'')
>     }
>
>     \layout{}
>     \midi{}
> }

If you remove the override for stem direction, it would appear the slur 
passes through both accidentals on both 2.18.2 and 2.19.48 via LilyBin.  
Also confirmed behavior locally on 2.19.81.

%%%%
  \version "2.18.2"
  {
    \override Slur.direction = #UP
    a'( ges'') a'( gis'') % Collision with both accidentals.
    \override Stem.direction = #UP
    a'( ges'') a'( gis'') % Collision with flat only.
  }
%%%%

-- Aaron Hill