Slur with two turning points - Revision history

SimonAlbrecht: Update OLL link

2026-03-13T18:14:19Z

Update OLL link

← Older revision		Revision as of 18:14, 13 March 2026
Line 1:		Line 1:
	A slur normally can only have one turning point. In special situations, one may need two or more turning points, however. This can be achieved by linking two (or more) slur stencils together. The control points need to be specified manually: for two segments this is a set of seven points, of which the fourth is shared by both segments. To ease working with the function, the control points are shown as light blue crosses if the second argument is ##t.<br />		A slur normally can only have one turning point. In special situations, one may need two or more turning points, however. This can be achieved by linking two (or more) slur stencils together. The control points need to be specified manually: for two segments this is a set of seven points, of which the fourth is shared by both segments. To ease working with the function, the control points are shown as light blue crosses if the second argument is ##t.<br />
	For a more refined solution to the problem, see [https://github.com/openlilylib/snippets/tree/~~compound-slur~~/notation-snippets/~~shaping-bezier~~-~~curves~~ Shaping Bezier Curves], needing version 2.19.48 or higher.		For a more refined solution to the problem, see [https://github.com/openlilylib/snippets/tree/master/notation-snippets/compound-slurs Shaping Bezier Curves], needing version 2.19.48 or higher.

	<lilypond version="2.24">		<lilypond version="2.24">

Lemzwerg: New category

2025-11-21T23:25:01Z

New category

← Older revision		Revision as of 23:25, 21 November 2025
Line 116:		Line 116:

	[[Category:Expressive marks]]		[[Category:Expressive marks]]
	[[Category:Tweaks and overrides]][[Category:Snippet]]		[[Category:Tweaks and overrides]]
			[[Category:Snippet]]

Lemzwerg at 23:00, 21 November 2025

2025-11-21T23:00:36Z

← Older revision		Revision as of 23:00, 21 November 2025
Line 116:		Line 116:

	[[Category:Expressive marks]]		[[Category:Expressive marks]]
	[[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

2025-11-16T18:57:49Z

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 18:57, 16 November 2025
Line 2:		Line 2:
	For a more refined solution to the problem, see [https://github.com/openlilylib/snippets/tree/compound-slur/notation-snippets/shaping-bezier-curves Shaping Bezier Curves], needing version 2.19.48 or higher.		For a more refined solution to the problem, see [https://github.com/openlilylib/snippets/tree/compound-slur/notation-snippets/shaping-bezier-curves Shaping Bezier Curves], needing version 2.19.48 or higher.

	<lilypond version="2.24.0">		<lilypond version="2.24">
	% put together by Harm and Simon Albrecht		% put together by Harm and Simon Albrecht
	% in <http://lists.gnu.org/archive/html/lilypond-user/2016-09/msg00441.html> ff.		% in <http://lists.gnu.org/archive/html/lilypond-user/2016-09/msg00441.html> ff.

Jean Abou Samra: Import snippet from LSR

2025-10-26T22:47:41Z

Import snippet from LSR

New page

A slur normally can only have one turning point. In special situations, one may need two or more turning points, however. This can be achieved by linking two (or more) slur stencils together. The control points need to be specified manually: for two segments this is a set of seven points, of which the fourth is shared by both segments. To ease working with the function, the control points are shown as light blue crosses if the second argument is ##t.<br />
For a more refined solution to the problem, see [https://github.com/openlilylib/snippets/tree/compound-slur/notation-snippets/shaping-bezier-curves Shaping Bezier Curves], needing version 2.19.48 or higher.

<lilypond version="2.24.0">
% put together by Harm and Simon Albrecht
% in <http://lists.gnu.org/archive/html/lilypond-user/2016-09/msg00441.html> ff.

#(define (make-cross-stencil coord)
"Draw a cross-stencil at coord."
(let ((thick 0.1)
(sz 0.2))
(stencil-with-color
(ly:stencil-add
(make-line-stencil
thick
(- (car coord) sz)
(- (cdr coord) sz)
(+ (car coord) sz)
(+ (cdr coord) sz))
(make-line-stencil
thick
(- (car coord) sz)
(+ (cdr coord) sz)
(+ (car coord) sz)
(- (cdr coord) sz)))

cyan)
))

compoundSlur =
#(define-event-function (contr-pts ann?) (list? boolean?)
(let ((proc (lambda (grob)
(let* (;; only here for reference:
(cps (ly:slur::calc-control-points grob))
(cps1 (list
(first contr-pts)
(second contr-pts)
(third contr-pts)
(fourth contr-pts)))
(cps2 (list
(fourth contr-pts)
(fifth contr-pts)
(sixth contr-pts)
(seventh contr-pts)))
(first-spline-stil
(begin
(ly:grob-set-property! grob 'control-points cps1)
(ly:slur::print grob)))
(second-spline-stil
(begin
(ly:grob-set-property! grob 'control-points cps2)
(ly:slur::print grob)))
;; annotates all new control-points
(crosses
(if ann?
(apply
ly:stencil-add
(map
(lambda (c)
(make-cross-stencil c))
(append cps1 cps2)))
empty-stencil))
)
;(pretty-print cps)

(ly:stencil-add
first-spline-stil
second-spline-stil
crosses)))))
#{ -\tweak stencil $proc ( #}))

cptsA = #'((0.6 . 5.8)
(3.6 . 7.8)
(25.0 . 5.0)
(32 . 12)
(39.0 . 17.5)
(53.1 . 16.0)
(55.5 . 12.5))

upper = \relative {
\key d \major
\clef bass
s2 r8 d,16 g b d g b
d8 r s2.
s4 \voiceTwo b8.(-- c16-- b2--)
}
lower = \relative {
\key d \major
\clef bass
r2
<d' b g=>~-^-\compoundSlur \cptsA ##t
<<
{
<d b g>4 <c g e> <b g> \voiceOne cis
\change Staff = upper
\clef treble \voiceOne d e fis2)
\fermata
}
\new Voice {
\voiceTwo
s2. <g,= e>4 \oneVoice
<fis b,> <g e> <fis dis>2\fermata
}
>>
}
\score {
<<
\new PianoStaff <<
\new Staff = upper \upper
\new Staff = lower \lower
>>
>>
}
</lilypond>

[[Category:Expressive marks]]
[[Category:Tweaks and overrides]]