Re: Postponed Bugs #83 and #297: "a Someone Else Problem"

[Juergen Reuter]

On Tue, 29 Jan 2008, Han-Wen Nienhuys wrote:

> 2008/1/27, Juergen Reuter <address@hidden>:
> > > The ligature events are implemented as 'command-event', like \bar and
> > > \time, which fall in between the notes.    This is inconsistent with
> > > start/stop commands like [ ] , but I can't really judge if that is the
> > > best way to do it.
> >
> > Hmmh, I don't understand.  In Lily 2.7.x, in define-music-types.scm,
> > LigatureEvent has "(types . (general-music span-event ligature-event
> > event))", i.e. it is a SpanEvent, or am I missing something?  In Lily
> > 2.11.x, it is implemented as StreamEvent, due to Erik's changes.  How is
> > this related to "command-event" (which, btw, I could not find in the
> > sources)?
>
> this distinction is not in the music 'type-system', but rather how the
> events are attached to other things.  Beam/slur/etc. start/stop are
> attached to the notes, so in
>
>  c4]
>
> the ] starts at the beginning of the note.  Commands like \bar , \clef
> and \] are not attached to notes, so for
>
>  c4 \]
>
> the event registers at the end of the note, at the start of the new time-step.

Aah, ok, I see.

> I don't know what the best solution is, but for consistency, it would
> probably be best if they were attached to notes like beams.

Yes.  Honestly speaking, I did not feel too much comfortable, when the 
post attributes-like "c4[ c4]" kind of notation for slurs and beams was 
introduced.  But you are right, for the sake of consistency, ligature 
notation probably should follow this approach, too (as already mentioned 
in the docs, btw.).

> The
> downside to attaching to notes is that you would not be able to do
>
>  ligs = { \[ s2 \] }
>
>  <<  { c8 d e f }
>        \ligs >>
>
> and have the ligature enclose the 4 notes.

I think this is a non-issue, because having a ligature in one voice 
definitely does not imply that there are simultaneous ligatures in other 
voices.  That is, in the above example, having the ligature enclose the 4 
notes would actually be a bug.  By the way, if you are using ligature 
brackets, there should be only a single voice per staff anyway; otherwise, 
the notation would easily become confusing for the human reader (i.e. 
which ligature bracket belongs to which notes, etc.).

> > (Oh, you are right, it's difficult to find me on the web, since my old
> > home page unfortunately died a while ago; there is now a new one at
> > www.juergen-reuter.de).
>
> maybe you can update the relevant web-pages? That would be a useful
> exercise in git use :-)

You should claim sponsoring from the git guys for advertising and 
spreading use of their piece of software among the lilypond community! :-)
Ok, I will eventually try, as soon as I find some time to browse through 
the git docs!

Greetings,
Juergen

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