Re: Issue 2400 in lilypond: Dots no longer aligned between voices

[lilypond]

Updates:
        Labels: patch-new

Comment #1 on issue 2400 by address@hidden: Dots no longer aligned  
between voices
http://code.google.com/p/lilypond/issues/detail?id=2400

The original complaint was the misalignment marked by -- in the attached  
music.  There was also a complaint that dots can be mistaken for staccato  
notes as in the situations marked by -. and this case is set in Stone's  
textbook with dots aligned. On the other hand, in the second of these  
examples with only the upper voice dotted, I think we would rather keep the  
dot close to the note than move the dot and upper note far to the right.

Looking more at dot situations, I noticed the tight configuration marked by  
the teardrop staccatissimo sign.

These upper-voice dots could be perfectly aligned by adding nearby  
lower-voice note-heads to the list of "support" grobs that determine the  
location of the upper voice's dots, and increasing the vertical range of  
the "support" if the supporting notehead has its own dot(s).

Other effects of having one Dot_column_engraver handle all voices, are that  
dots can move to make room for dots from other voices.  The clusters marked  
with -2 and -3 get a dot for each notehead if the Dot_column_engraver works  
at Staff level.

Ideally, we would make Dot_column_engraver smart enough to do the things  
mentioned above, but still let dots align independently in chords such as  
the one marked by the trill, which is the example used in Ross' textbook to  
show why dots in different voices should be independently aligned.

Until we have the ideal, I intend to put the Dot_column_engraver back in  
Staff where it was in version 2.14 <http://codereview.appspot.com/5846043>,  
even though I will move it to Voice in my own scores.

Attachments:
        2400.png  4.7 KB
        2400.after.png  4.7 KB