+++ /dev/null
-\version "2.12.0"
-\header {
- lsrtags = "pitches,editorial-annotations,really-cool"
- texidoc = "
-It is possible to color note heads depending on their pitch and/or their names:
-the function used in this example even makes it possible to distinguish enharmonics.
-"
- doctitle = "Coloring notes depending on their pitch"
-}
-
-%LSR Thanks a LOT to Damian leGassick, Steven Weber and Jay Anderson for this snippet
-
-%Association list of pitches to colors.
-#(define color-mapping
- (list
- (cons (ly:make-pitch 0 0 0) (x11-color 'red))
- (cons (ly:make-pitch 0 0 1/2) (x11-color 'green))
- (cons (ly:make-pitch 0 1 -1/2) (x11-color 'green))
- (cons (ly:make-pitch 0 2 0) (x11-color 'red))
- (cons (ly:make-pitch 0 2 1/2) (x11-color 'green))
- (cons (ly:make-pitch 0 3 -1/2) (x11-color 'red))
- (cons (ly:make-pitch 0 3 0) (x11-color 'green))
- (cons (ly:make-pitch 0 4 1/2) (x11-color 'red))
- (cons (ly:make-pitch 0 5 0) (x11-color 'green))
- (cons (ly:make-pitch 0 5 -1/2) (x11-color 'red))
- (cons (ly:make-pitch 0 6 1/2) (x11-color 'red))
- (cons (ly:make-pitch 0 1 0) (x11-color 'blue))
- (cons (ly:make-pitch 0 3 1/2) (x11-color 'blue))
- (cons (ly:make-pitch 0 4 -1/2) (x11-color 'blue))
- (cons (ly:make-pitch 0 5 1/2) (x11-color 'blue))
- (cons (ly:make-pitch 0 6 -1/2) (x11-color 'blue))
- ))
-
-%Compare pitch and alteration (not octave).
-#(define (pitch-equals? p1 p2)
- (and
- (= (ly:pitch-alteration p1) (ly:pitch-alteration p2))
- (= (ly:pitch-notename p1) (ly:pitch-notename p2))))
-
-#(define (pitch-to-color pitch)
- (let ((color (assoc pitch color-mapping pitch-equals?)))
- (if color
- (cdr color))))
-
-#(define (color-notehead grob)
- (pitch-to-color
- (ly:event-property (ly:grob-property grob 'cause) 'pitch)))
-
-\score {
- \new Staff \relative c' {
- \override NoteHead #'color = #color-notehead
- c8 b d dis ees f g aes
- }
-}