Re: Changing staff size with custom note head stencils

[Paul Morris]

On Oct 31, 2012, at 4:52 PM, Thomas Morley <address@hidden> wrote:

Hi Paul,

postscript is scaled with global-staff-size only.

To work around you could use:

TwinNoteNoteHeads =
#(lambda (grob)
 (let* ((sz (ly:grob-property grob 'font-size 0.0))
        (mult (magstep sz)))
     (set! (ly:grob-property grob 'stencil) (ly:stencil-scale
(stencil-notehead grob) mult mult))
     (set! (ly:grob-property grob 'stem-attachment) (stem-adjuster grob))))

Hi Harm and Mike,  

Thank you both for your help!  Harm's work around does the trick nicely!

On Mike's suggestion I also switched to using internal path stencils instead of embedded PS. The only problem I ran into was using "fill" to get a filled triangle.  I used:

upTriangle =

#(ly:make-stencil

    '(path 0.09

        '(moveto -.1875 -.5

          lineto .65625 .5

          lineto 1.5 -.5

          closepath

          fill ()

          )

     )

    (cons -.1875 1.5)

    (cons -.5 .5)

)

When I typeset my file the visual output is correct (filled triangles), but I get either an "Unsupported SCM value for format" error for each of those notes.  (Or if I omit the "()" after "fill" then the rendering fails with "Wrong type argument in position 1 (expecting pair): ()").  I did not find much documentation for "path", only a snippet that doesn't use "fill" [1].  

Does anyone know the value that is needed for "fill" to avoid this error?

Thanks again, it will be great to be able to resize staves!

-Paul

[1] http://lsr.dsi.unimi.it/LSR/Item?id=623