So here is an MWE showing the start of what I want to do - make circular
unfilled noteheads, and fitting in the staff size. This is only a start,
as the set of note styles I need have many extra doodads, so this is
just to get going.
It's been a long time since I have done any Lilypond Scheme. I'm wanting
help on how to size and position the noteheads properly. This initial
code is only my first sketch. I'm aware I need to flip the side when the
stem points down - that's not the main focus. I am also foggy on the
last arguments specfying the x and y extents. I can't recall what
extents are and how they affect this context (having trouble searching
for extent in the NR).
The code is my own using the Bezier approximation for a circle. The
variable k is kappa - as referenced in a previous post on 'Circles' and
r is radius.
====
\version "2.23.11"
circa =
#(let ((k 0.5522)
(r 1))
(ly:make-stencil `(path 0.1
(moveto ,r 0
curveto ,r ,k ,k ,r 0 ,r
curveto ,(- k) ,r ,(- r) ,k ,(- r) 0
curveto ,(- r) ,(- k) ,(- k) ,(- r) 0 ,(- r)
curveto ,k -1 1 ,(- k) 1 0
))
(cons 1 1) (cons 1 1)))
insta = {
c'4 d' e' f' g' a' b' c''
}
\score {
\new Staff \insta
\layout {
\context {
\Score
% custom circular noteheads
\override NoteHead.stencil = #circa
}
}
}
====
Andrew
