Re: Beam & feathered beam together

[Thomas Morley]

Am Mi., 14. Nov. 2018 um 18:07 Uhr schrieb Pierre Perol-Schneider
<address@hidden>:
>
> Here's where I am so far:
>
> \version "2.19.82"
> \fixed c' {
>   <<
>     { \voiceOne
>       c16-\offset positions #-1 [ c c c c c c c c c c c c ] }
>       \\
>     { \voiceOne s4
>        \once\override Beam.positions = #'(0 . -.8)
>        c8[ s s s  c] }
>   >>
> }
>
> Cheers,
> Pierre
>
> Le mer. 14 nov. 2018 à 14:44, Pierre Perol-Schneider <address@hidden> a écrit 
> :
>>
>> BTW, here's the -- ugly -- coding to obtain the image:
>>
>> \relative c' {
>>   \once\override Beam.stencil =
>>     #(lambda (grob) ly:beam::print
>>        (grob-interpret-markup grob
>>            #{ \markup\raise #1.8 \pattern #2 #Y #0.13 \beam #45 #0 #.41 #}))
>>   c16-\offset positions #1.8 [ c c c c ]
>>   \override Beam.grow-direction = #RIGHT
>>   \featherDurations #(ly:make-moment 3/4)
>>   { c64[ c c c c c c c] }
>> }
>>
>> Cheers,
>> Pierre
>>
>> Le mer. 14 nov. 2018 à 12:43, Pierre Perol-Schneider <address@hidden> a 
>> écrit :
>>>
>>> Hi,
>>> I'm trying to make the following output (see attached png).
>>> Any idea ?
>>>
>>> snippet:
>>> %%
>>> \version "2.19.82"
>>> \relative c' {
>>>   c16-\offset positions #2 [ c c c ]
>>>   \override Beam.grow-direction = #RIGHT
>>>   \featherDurations #(ly:make-moment 3/4)
>>>   { c64[ c c c c c c c] }
>>> }
>>> %%
>>>
>>> TIA, chears,
>>> Pierre
>
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Hi Pierre,

currently setting 'grow-direction is possible for the whole beam only,
but not starting a feather at arbitrary position after the beam has
already begun.

It _is_ possible to code a stencil-override to create such a thing,
but it is a huge effort. I did similar before, alas not exactly what's
needed here.

You could try to hack two voices as you already posted, probably like:

\fixed c' {
  <<
    { \voiceOne
      c16-\offset positions #-1.7 [ c c c c c c c c c c c c ] }
      \\
    { \voiceOne
        s4
       \override Beam.grow-direction = #RIGHT
       c64*4 [ \repeat unfold 7 s  c] }
  >>
}

or

\fixed c' {
  <<
    { \voiceOne
      c16-\offset positions #-1.2 [ c c c c c c c c c c c c ] }
      \\
    { \voiceOne
        s4
       \override Beam.grow-direction = #RIGHT
       c32*4 [ \repeat unfold 3 s  c] }
  >>
}

If you need a more robust thingy I could give it a try, but I'm not
sure when. Probably you'll have to wait some weeks.
Some other things are more prominent on my TODO-list:
Things that I've promised to do have even less priority than things
I've promised to finish last week have less priority than things I've
promised to have done weeks ago etc ...

Cheers,
  Harm