%% Generated by lilypond-book.py %% Options: [alt=[image of music],printfilename,indent=0\mm,texidoc,line-width=160\mm] \include "lilypond-book-preamble.ly" % **************************************************************** % Start cut-&-pastable-section % **************************************************************** \paper { #(define dump-extents #t) indent = 0\mm line-width = 160\mm force-assignment = #"" line-width = #(- line-width (* mm 3.000000)) } \layout { } % **************************************************************** % ly snippet: % **************************************************************** \sourcefilename "/home/lilydev/vc/gub/target/linux-x86/src/lilypond-localhost--home-lilydev-vc-lilypond-master/input/regression/flags-in-scheme.ly" \sourcefileline 0 \version "2.12.0" \header { texidoc = "The 'flag property of the Stem grob can be set to a custom scheme function to generate the glyph for the flag." } % test notes, which will be shown in different style: testnotes = { \autoBeamOff c'8 d'16 c'32 d'64 \acciaccatura {c'8} d'64 c''8 d''16 c''32 d''64 \acciaccatura {c''8} d''64 } #(define-public (weight-flag stem-grob) (let* ((log (- (ly:grob-property stem-grob 'duration-log) 2)) (is-up (eqv? (ly:grob-property stem-grob 'direction) UP)) (yext (if is-up (cons (* log -0.8) 0) (cons 0 (* log 0.8)))) (flag-stencil (make-filled-box-stencil '(-0.4 . 0.4) yext)) (stroke-style (ly:grob-property stem-grob 'stroke-style)) (stroke-stencil (if (equal? stroke-style "grace") (make-line-stencil 0.2 -0.9 -0.4 0.9 -0.4) empty-stencil))) (ly:stencil-add flag-stencil stroke-stencil))) % Create a flag stencil by looking up the glyph from the font #(define (inverted-flag stem-grob) (let* ((dir (if (eqv? (ly:grob-property stem-grob 'direction) UP) "d" "u")) (flag (retrieve-glyph-flag "" dir "" stem-grob)) (line-thickness (ly:staff-symbol-line-thickness stem-grob)) (stem-thickness (ly:grob-property stem-grob 'thickness)) (stem-width (* line-thickness stem-thickness)) (stroke-style (ly:grob-property stem-grob 'stroke-style)) (stencil (if (null? stroke-style) flag (add-stroke-glyph flag stem-grob dir stroke-style ""))) (rotated-flag (ly:stencil-rotate-absolute stencil 180 0 0))) (ly:stencil-translate rotated-flag (cons (- (/ stem-width 2)) 0)))) { \override Score.RehearsalMark #'self-alignment-X = #LEFT \time 2/4 \mark "Function: weight-flag (custom)" \override Stem #'flag = #weight-flag \testnotes \mark "Function: inverted-flag (custom)" \override Stem #'flag = #inverted-flag \testnotes } % **************************************************************** % end ly snippet % ****************************************************************