Re: less than two visible stems

[Han-Wen Nienhuys]

Sean Reed wrote:
> i can think of instances where a warning is valid, but the only ones 
> that come to mind right off the bat are generally stylistic issues; for 
> example, when beaming a 16th note to a dotted 8th rest in most common 
> forms of classical music notation.
>
> what other situations for valid warnings are there that i'm overlooking? 
> this might clarify understanding of autoBeam and help find an idea for a 
> creative approach to the issue (i'm sure you guys have thought these 
> things through, especially being active instrumentalists yourselves).
>
> i can beam the following with no warning about "less than two visible 
> stems": a16[ r8 a16]. whereas a16[ r8.] gives me the warning.

I've removed the warning. There's still a warning for a beam with only 1 
stem.

> would it be feasible to implement different automatic beaming 
> environments? perhaps with an argument in the context part of the 
> function to indicate which beat duration then gets checked for potential 
> mistakes? for example, one could indicate # (set-automaticBeaming-style 
> 'restInclusion #('quarters#)) [forgive me if that's senseless code!]. 
> this would indicate, for example, that rests can be beamed to notes, 
> even in groups of two (one rest, one note), and that automatic beaming 
> is undertaken for every quarter note beat. this would perhaps also allow 
> for zeroguy's desire to not have to manually place the square brackets 
> all the time. one could also then choose #(set-automaticBeaming-style 
> 'default), like with the accidental styles, which would then give the 
> warnings we get now, and which would be default.

The autobeamer is a grotesque hack, which works remarkably well for a 
hack. However, I don't like the idea of sinking much time in it.
If you're interested, you can see what happens if you remove the 
following bits from auto beam engraver.


      else if (Rest::has_interface (info.grob ()))
        {
          end_beam ();
        }

...

      /*
        Don't (start) auto-beam over empty stems; skips or rests
      */
      if (!Stem::head_count (stem))
        {
          if (stems_)
            end_beam ();
          return;
        }


--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen