Generating custom flags - Revision history

Lemzwerg at 07:34, 8 December 2025

2025-12-08T07:34:27Z

← Older revision		Revision as of 07:34, 8 December 2025
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	{		{
	\time 1/4		\time 1/4
	~~\textMark~~ "Normal flags"		<>^"Normal flags"
	\snippetexamplenotes		\snippetexamplenotes

	~~\textMark~~ "Custom flag: inverted"		<>_"Custom flag: inverted"
	\override Flag.stencil = #inverted-flag		\override Flag.stencil = #inverted-flag
	\snippetexamplenotes		\snippetexamplenotes

	~~\textMark~~ "Custom flag: weight"		<>^"Custom flag: weight"
	\override Flag.stencil = #weight-flag		\override Flag.stencil = #weight-flag
	\snippetexamplenotes		\snippetexamplenotes

	~~\textMark~~ "Revert to normal"		<>_"Revert to normal"
	\revert Flag.stencil		\revert Flag.stencil
	\snippetexamplenotes		\snippetexamplenotes

Lemzwerg at 10:58, 30 November 2025

2025-11-30T10:58:41Z

← Older revision		Revision as of 10:58, 30 November 2025
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	The <code>stencil</code> property of the <code>Flag</code> grob can be set to a custom ~~scheme~~ function to generate the glyph for the flag.		The <code>stencil</code> property of the <code>Flag</code> grob can be set to a custom Scheme function to generate the glyph for the flag.

	<lilypond version="2.24">		<lilypond version="2.24">
Line 56:		Line 56:
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]]
	[[Category:Rhythms]]		[[Category:Rhythms]]
			[[Category:Scheme]]
	[[Category:Tweaks and overrides]]		[[Category:Tweaks and overrides]]
	[[Category:Snippet]]		[[Category:Snippet]]

Lemzwerg: New category

2025-11-21T23:19:45Z

New category

← Older revision		Revision as of 23:19, 21 November 2025
Line 56:		Line 56:
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]]
	[[Category:Rhythms]]		[[Category:Rhythms]]
	[[Category:Tweaks and overrides]][[Category:Snippet]]		[[Category:Tweaks and overrides]]
			[[Category:Snippet]]

Lemzwerg at 22:53, 21 November 2025

2025-11-21T22:53:44Z

← Older revision		Revision as of 22:53, 21 November 2025
Line 56:		Line 56:
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]]
	[[Category:Rhythms]]		[[Category:Rhythms]]
	[[Category:Tweaks and overrides]]		[[Category:Tweaks and overrides]][[Category:Snippet]]

Jean Abou Samra: Replace version="2.24.0" with version="2.24" now that the LilyWiki extension supports auto-selecting the latest release in a stable series

2025-11-16T18:48:00Z

Replace version="2.24.0" with version="2.24" now that the LilyWiki extension supports auto-selecting the latest release in a stable series

← Older revision		Revision as of 18:48, 16 November 2025
Line 1:		Line 1:
	The <code>stencil</code> property of the <code>Flag</code> grob can be set to a custom scheme function to generate the glyph for the flag.		The <code>stencil</code> property of the <code>Flag</code> grob can be set to a custom scheme function to generate the glyph for the flag.

	<lilypond version="2.24.0">		<lilypond version="2.24">
	#(define-public (weight-flag grob)		#(define-public (weight-flag grob)
	(let* ((stem-grob (ly:grob-parent grob X))		(let* ((stem-grob (ly:grob-parent grob X))

Jean Abou Samra: Import snippet from LSR

2025-10-26T22:45:38Z

Import snippet from LSR

New page

The <code>stencil</code> property of the <code>Flag</code> grob can be set to a custom scheme function to generate the glyph for the flag.

<lilypond version="2.24.0">
#(define-public (weight-flag grob)
(let* ((stem-grob (ly:grob-parent grob X))
(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 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 grob)
(let* ((stem-grob (ly:grob-parent grob X))
(dir (if (eqv? (ly:grob-property stem-grob 'direction) UP) "d" "u"))
(flag (retrieve-glyph-flag "" dir "" grob))
(line-thickness (ly:staff-symbol-line-thickness grob))
(stem-thickness (ly:grob-property stem-grob 'thickness))
(stem-width (* line-thickness stem-thickness))
(stroke-style (ly:grob-property 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))))

snippetexamplenotes =
{
\autoBeamOff c'8 d'16 c'32 d'64 \acciaccatura {c'8} d'64
}

{
\time 1/4
\textMark "Normal flags"
\snippetexamplenotes

\textMark "Custom flag: inverted"
\override Flag.stencil = #inverted-flag
\snippetexamplenotes

\textMark "Custom flag: weight"
\override Flag.stencil = #weight-flag
\snippetexamplenotes

\textMark "Revert to normal"
\revert Flag.stencil
\snippetexamplenotes
}
</lilypond>

[[Category:Included in the official documentation]]
[[Category:Rhythms]]
[[Category:Tweaks and overrides]]