Re: Issue 2042 in lilypond: Enhancement request for new representation of augmented pitch name/designation

[lilypond]

Comment #1 on issue 2042 by address@hidden: Enhancement request for  
new representation of augmented pitch name/designation
http://code.google.com/p/lilypond/issues/detail?id=2042

Despite my lack of metafont knowledge, I have started tweaking some of the  
glyphs:
http://codereview.appspot.com/5683051

Please note: That patch is not yet ready for review, it is simply to show  
some ideas, which need to be improved a lot!

That patch simply takes the digits 2, 4 and 5 of the feta font, stretches  
the one line that will be slashed, and adds a vertical box as a slash  
through it. These glyphs are not yet used by the figured bass formatting  
functions, but you can already use them via the musicglyph markup function.  
Attached is a simple test file showing the glyphs.


Some issues:
-) I have no idea how to properly implement the 6+ (the upper arc should  
have much less curvature and the slash is drawn through it. I would like  
the flare to have less turning angle, but with beta != +-90 it is no circle  
any more).
-) Currently I place the slashes at more or less hardcoded positions and  
they are straight vertical. In particular for the 2 it might make sense to  
calculate the real intersection of the slash with the lower wavy line, so  
the slash is vertically centered. It might also be slanted to be  
perpendicular to the line it slashes through. Similarly, I'm not sure if  
the 5 should get a slightly slanted slash...
-) I have no idea whether I should adjust the height of the boxes to  
include the slash.
-) etc.

It would be great if someone with more metafont knowledge could improve  
those issues.


Attachments:
        figured-bass-slashed-figures-test.ly  483 bytes
        figured-bass-slashed-figures-test.preview.pdf  20.0 KB