On Thu, Jun 4, 2015 at 2:41 PM, priosfilho <pauloriosfi...@gmail.com> wrote:
> Sorry, Nathan. I will try to make my point clearer.
>
> *Firstly*, I got the code developed earlier in this thread and altered the
> numbers of handles of path-gliss to four -- the original version came with
> the values (list 'curveto 0 0 (first handle) (second handle)).
>
Thanks, this is what I was asking for.
It seems that part of the problem is the mailing list wrapping long lines,
so I'll attach the code.
Regards,
Nathan
\version "2.18.2"
glissWidth = #0.175 %<< global variable for glissando width
#(define (radians->degrees theta)
(* theta (/ 180 PI)))
#(define (path-gliss handle)
(lambda (grob)
(if (ly:stencil? (ly:line-spanner::print grob))
(let* ((stencil (ly:line-spanner::print grob))
(X-ext (ly:stencil-extent stencil X))
(Y-ext (ly:stencil-extent stencil Y))
(width (interval-length X-ext))
(height (interval-length Y-ext))
(lefty (cdr (assoc 'Y (ly:grob-property grob 'left-bound-info))))
(righty (cdr (assoc 'Y (ly:grob-property grob 'right-bound-info))))
(deltay (- righty lefty))
(dir (if (> deltay 0) 1 -1))
)
(ly:stencil-translate
(ly:stencil-add
(grob-interpret-markup grob
(markup
(#:path glissWidth
(list (list 'moveto 0 0)
(list 'curveto (first handle) (second handle) (third handle) (fourth handle) width (* height dir))))))
(ly:stencil-translate
; the \rotate markup command doesn't let us pick a rotation center, so we resort to the stencil command
(ly:stencil-rotate
(grob-interpret-markup grob
(markup #:arrow-head X RIGHT #t))
(radians->degrees
($atan2
(- (* height dir) (fourth handle))
(- width (third handle)))) 1 0)
(cons width (* height dir))))
(if (> dir 0)
(cons (interval-start X-ext) (+ (interval-start Y-ext) 0.1))
(cons (interval-start X-ext) (+ (interval-start Y-ext) height))))) #f)))
#(define (add-gliss m)
(case (ly:music-property m 'name)
((NoteEvent) (set! (ly:music-property m 'articulations)
(append (ly:music-property m 'articulations)
(list (make-music (quote GlissandoEvent)))))
m)
(else #f)))
addGliss = #(define-music-function (parser location music)
(ly:music?)
(map-some-music add-gliss music))
\relative c' {
\numericTimeSignature
\tempo 4=52
\override NoteHead.font-size = #-1.5
$(add-grace-property 'Voice 'NoteHead 'font-size -4.5)
\time 5/8
\override Score.GraceSpacing.spacing-increment = #7
\once \override Glissando #'bound-details =
#'((right (attach-dir . -2) (end-on-accidental .
#f) (padding . 1))
(left (attach-dir . 0) (padding . 0.)))
\addGliss {
\once \override Glissando #'stencil = #(path-gliss '(7 1 0 4))
\grace b16
a''4.~->}
\tuplet 5/4 { a16 gis fis, e'-> a,~ }
\time 3/8
}_______________________________________________
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