LilyPond Beginnershandleiding

Hoofdstuk 4: Tweaking output 100
{
}
\time 12/16
\override Staff.BarLine.stencil = ##f
c4 b8 c d16 c d8 |
g,8 a16 b8 c d4 e16 |
e8
12
16
Now the bar lines have vanished. Setting the stencil property to #f is such a frequent
operation that there is a shorthand for it called \omit:
{
}
\time 12/16
\omit Staff.BarLine
c4 b8 c d16 c d8 |
g,8 a16 b8 c d4 e16 |
e8
12
16
Note, though, that setting the stencil property to #f will cause errors when the dimensions
of the object are required for correct processing. For example, errors will be generated if the
stencil property of the NoteHead object is set to #f. If this is the case, you can instead use
the point-stencil function, which sets the stencil to a object with zero size:
{
}
c4 c
\once \override NoteHead.stencil = #point-stencil
c4 c
The break-visibility property
We see from the BarLine properties in the IR that the break-visibility property requires
a vector of three booleans. These control respectively whether bar lines are printed at the end
of a line, in the middle of lines, and at the beginning of lines. For our example we want all
bar lines to be suppressed, so the value we need is #(#f #f #f) (also available under the name
all-invisible). Let’s try that, remembering to include the Staff context. Note also that in
writing this value we have ## before the opening parenthesis. One # is required as part of vector
constant syntax, and the first # is required, as always, to precede the value itself in the \override
command.
{
\time 12/16