On Thu, 18 Mar 2004, Jan Nieuwenhuizen wrote:
> Joerg Anders writes:
>
> > Or perhaps a pointer into the LilyPond C code ?
>
First of all: Thank you all who answered this question.
> LilyPond uses rule based autobeaming, but it's far from perfect. It's
> one of those things we'll have to Get Right (TM) some time. The rules
> are listed in
>
> scm/auto-beam.scm
>
> and use time signature, position in measure and shortest note in beam.
Very interesting!
What happens if 2 rules match ?
For instance in scm/auto-beam.scm:
((end * * 4 4) . ,(ly:make-moment 1 2))
...
((end 1 16 4 4) . ,(ly:make-moment 1 4))
I made an attempt: The time signature is 4/4. I placed 16 16ths
in 1st measure and and 8 8ths in 2nd measure.
The 16ths are grouped:
|--|--|--| |--|--|--| |--|--|--| |--|--|--|
|--|--|--| |--|--|--| |--|--|--| |--|--|--|
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
/ / / / / / / / / / / / / / / /
i.e. according to 2nd rule (If I comprehended all right)
The 8th are grouped:
|---|---|---| |---|---|---|
| | | | | | | |
| | | | | | | |
/ / / / / / / /
i.e. according to 1st rule (If I comprehended all right)
Ok here is no problem because the 2nd rule does not match.
But if I apply the 1st rule to 1st measure the result could be:
|--|--|--|--|--|--|--| |--|--|--|--|--|--|--|
|--|--|--|--|--|--|--| |--|--|--|--|--|--|--|
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
/ / / / / / / / / / / / / / / /
What's the rule over rules ?
a.) The last matching rules is applied ?
b.) The most precise rule is applied ?
--
J.Anders, Chemnitz, GERMANY ([EMAIL PROTECTED])
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