Hi Simon,
thanks for your explanation. Now I get it. I think that the unexpected
use of #UP in the example in the docs is very confusing. Maybe it should
be mentioned somewhere that #UP equals 1 and #DOWN equals -1.
Sylvius
On 20.12.2016 20:26, Simon Albrecht wrote:
Hi Sylvius,
there is no bug involved. If you don’t understand something, it’s
better to ask on the user list. Help will be gladly given.
On 20.12.2016 20:10, Sylvius Pold wrote:
Hi,
I seem to have some problems understanding the manuals. In
lilypond-notation (instrument specific markup) I read:
‘\note’ DURATION (string) DIR (number)
This produces a note with a stem pointing in DIR direction, with
the DURATION for the note head type and augmentation dots. For
example, ‘\note #"4." #-0.75’ creates a dotted quarter note, with a
shortened down stem.
This description says that the \note markup command takes _two_
_mandatory_ arguments.
The first is for the duration, which, as shown in the doc string
example, can include one or more augmentation dots.
The second is for the stem direction _and_ length. #UP evaluates to 1,
#DOWN evaluates to -1. Positive numbers make the stem go up, negative
numbers make it go down, the absolute amount is a factor for the
length. So using #0.2 gives you a very short up stem, #-10 gives you a
very long down stem.
It's not clear to me how to achieve e.g. a dotted quarter note, with
a shortened *up* stem. This does not work:
1. \markup { \note #"4" #UP #0.75 }
2. \markup { \note #"4" #UP #-0.75 }
The function doesn’t take a third argument.
It's also not clear to me why it is necessary to define a DIR
direction in order to get a whole note.
First way to answer: Technically, whole notes do have stems, only they
are invisible. Though that’s really just an internal detail.
Second way: The function just isn’t implemented such as to have an
optional argument, so you always need to give both arguments, even for
whole notes.
HTH, Simon
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