Re: automatic beams: is it possible to achieve this automatically?

[Carl Sorensen]

On 9/26/09 6:45 AM, "Frédéric Bron" <address@hidden> wrote:

>>> I would like the default behaviour of 2/4 time, i.e. beams end at the
>>> end of each beat.
>>> However, if there are only 8th notes in the measure, I would like the
>>> beam not to stop half measure as shown below.
>>> Is it possible to achieve that with automatic rules? With 2.13 maybe?
>>> but I did not see in the doc. what really changed in that version.
>> 
>> With the new version of 2.13, you can get *almost* all of this.
>> 
>> The final group c8[ c16 c] will not be automatically grouped right now,
>> because the current logic for the auto-beam ending doesn't look forward
>> clear to the end of the beam.
>> 
>> I have identified where to fix this, but I don't yet have code that is
>> ready for inclusion in LilyPond.  I hope to have it fixed in about three
>> weeks.  (This week is the beginning of school, so I have *LOTS* to do, and
>> very little time to spend on LilyPond.)
> 
> Hi Carl, I have read the doc of 2.13 but do not think it is possible.
> I particular, I would like:
> c8 c c c -> c8[ c c c]
> c16 c c8 c c -> c16[ c c8] c[ c]

I believe that 

c16 c c8 c c -> c16[ c c8] c[ c] is handled automatically right now.

However

c8 c c16 c c8 -> c8[ c] c16[ c c8] is *not* handled automatically right now.


To do this properly will require a recursive sort of check for autobeaming
when the shortest duration in a potential beam is changed.

It's still on my to-do list, and I'm thinking about it, but I haven't got it
figured out yet.

Thanks,

Carl