Lemzwerg at 09:37, 25 December 2025

2025-12-25T09:37:52Z

Lemzwerg: New category

2025-11-21T23:36:30Z

New category

← Older revision		Revision as of 23:36, 21 November 2025
Line 108:		Line 108:
	[[Category:Scheme]]		[[Category:Scheme]]
	[[Category:Symbols and glyphs]]		[[Category:Symbols and glyphs]]
	[[Category:Really cool]][[Category:Snippet]]		[[Category:Really cool]]
			[[Category:Snippet]]

Lemzwerg at 23:02, 21 November 2025

2025-11-21T23:02:41Z

← Older revision		Revision as of 23:02, 21 November 2025
Line 108:		Line 108:
	[[Category:Scheme]]		[[Category:Scheme]]
	[[Category:Symbols and glyphs]]		[[Category:Symbols and glyphs]]
	[[Category:Really cool]]		[[Category:Really cool]][[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

2025-11-16T18:52:51Z

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 18:52, 16 November 2025
Line 9:		Line 9:
	In addition this snippet shows how to create a ''filled'' stencil using <code>path,</code> and adds a scheme function to automatically resize custom stencils when individual staves are resized.		In addition this snippet shows how to create a ''filled'' stencil using <code>path,</code> and adds a scheme function to automatically resize custom stencils when individual staves are resized.

	<lilypond version="2.24.0">		<lilypond version="2.24">
	%% http://lsr.di.unimi.it/LSR/Item?id=623		%% http://lsr.di.unimi.it/LSR/Item?id=623

Jean Abou Samra: Import snippet from LSR

2025-10-26T22:41:45Z

Import snippet from LSR

New page

The stencil expression <code>path</code> can be used to override stencils for any printed object. The advantage of using <code>path</code> instead of <code>embedded-ps</code> is that <code>path</code> is supported by both the PostScript and SVG backends, and uses the same syntax.

There are six commands available to use in a <code>path</code> expression, and all commands use prefix notation. The six commands are <code>moveto, rmoveto, lineto, rlineto, curveto,</code> and <code>rcurveto</code>. Note that the commands that begin with ''r'' are the relative variants of the other three commands.

The commands <code>moveto, rmoveto, lineto,</code> and <code>rlineto</code> take 2 arguments; they are the X and Y coordinates for the destination point.

The commands <code>curveto</code> and <code>rcurveto</code> create cubic Bézier curves, and take 6 arguments; the first two are the X and Y coordinates for the first control point, the second two are the X and Y coordinates for the second control point, and the last two are the X and Y coordinates for the destination point.

In addition this snippet shows how to create a ''filled'' stencil using <code>path,</code> and adds a scheme function to automatically resize custom stencils when individual staves are resized.

<lilypond version="2.24.0">
%% http://lsr.di.unimi.it/LSR/Item?id=623

%{
Note: since SVG path data needs an "M" or "m" at the
beginning to start a new subpath, every path expression
must begin with "rmoveto" (or "moveto") to work with the
SVG backend.
%}

customClefStencilOne =
#(ly:make-stencil
`(path 0.2
(rmoveto 0 0
rcurveto 0 0.75 1 0.75 1 0
rcurveto 0 -0.75 -1 -0.75 -1 0
rcurveto -1 0 -1 1.5 -0.5 1.5
rmoveto 0.5 -1.5
rcurveto -1 0 -1 -1.5 -0.5 -1.5
rmoveto 0.5 1.5
rmoveto 1 0
rcurveto 2.5 0 2.5 4 4 4
rmoveto -4 -4
rcurveto 2.5 0 2.5 -4 4 -4))
(cons -0.5 1)
(cons -3 5))

% a filled custom stencil
customClefStencilTwo =
#(ly:make-stencil
;; path line thickness is set to 0.1
`(path 0.1
;; path coordinates
(moveto 0 0
curveto 0 1 0.7 2.5 1.5 1.5
lineto 1.5 -3
closepath)
;; path cap style
round
;; path join style
round
;; path filled? #t or #f
#t)
;; horizontal extent
(cons 0 1.5)
;; vertical extent
(cons -3 2))

% scheme function to automatically resize a custom stencil
% when an individual staff is resized (uses font-size)
scaleCustomClefStencilTwo =
#(lambda (grob)
(let* ((sz (ly:grob-property grob 'font-size 0.0))
(mult (magstep sz)))
(ly:stencil-scale
customClefStencilTwo
mult mult)))

customClefOne = \override Staff.Clef.stencil = \customClefStencilOne
customClefTwo = \override Staff.Clef.stencil = \scaleCustomClefStencilTwo
normalClefs = \revert Staff.Clef.stencil

music =
\relative c' {
\customClefOne
\clef "alto"
c1 g1
\customClefTwo
\clef "bass"
c1 g1
\normalClefs
\clef "treble"
c1 g1
\clef "alto"
c1 g1
}
<<
\new Staff \with {
fontSize = #-3
\override StaffSymbol.staff-space = #(magstep -3)
\override StaffSymbol.thickness = #(magstep -3)
}
\music

\new Staff
\music

\new Staff \with {
fontSize = #2
\override StaffSymbol.staff-space = #(magstep 2)
\override StaffSymbol.thickness = #(magstep 2)
}
\music
>>
</lilypond>

[[Category:Tweaks and overrides]]
[[Category:Scheme]]
[[Category:Symbols and glyphs]]
[[Category:Really cool]]

Using path expressions to override stencils - Revision history

Lemzwerg at 09:37, 25 December 2025

Lemzwerg: New category

Lemzwerg at 23:02, 21 November 2025

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

Jean Abou Samra: Import snippet from LSR