On Mon, 20 Feb 2012 20:26:36 +0100 Reinhold Kainhofer <reinh...@kainhofer.com> wrote:
> On 20/02/2012 14:44, Reinhold Kainhofer wrote: > > On 20/02/2012 14:18, Nils wrote: > >> my pusblisher wants baroque figured bass gylphs. They have the strokes in > >> different places than the Lilypond versions. > >> I guess nobobdy did this so far, so I have to do it myself. > > Yes, we have a feature request > > (http://code.google.com/p/lilypond/issues/detail?id=2042 ), but no one > > has done any work on it. > > > >> Where is the point in the code where I have to start? I want to do it > >> right and use the same lilypond syntax like 4\+ or 6\\. > > I suppose that the proper way would be to create new glyphs in our fonts > > (using metafont, source file mf/feta-numbers.mf) and then adjust the > > format-bass-figure function (in scm/translation-functions.scm) to use > > those glyphs for the slashed figures. > > Despite my lack of metafont knowledge, I have started tweaking some of > the glyphs: > http://codereview.appspot.com/5683051 > > 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. > > Cheers, > Reinhold Very good! For me the next step would to get these automatically for lilypond syntax 2\+ and after that worry about the 6, 7 and 9. Detailed tweaks like microplacement and shape of the slashes are in the end the most important for the viewer, though. I agree on that. Maybe one of the readers who are better lilypond-educated than me could answer this? Nils _______________________________________________ lilypond-devel mailing list lilypond-devel@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-devel
