Re: Feature Request: Partial Capo Support

[Thomas Morley]

2015-05-29 1:43 GMT+02:00 Frank D. Engel, Jr. <address@hidden>:
>
>
> On 5/26/2015 18:27, Thomas Morley wrote:
>>
>> 2015-05-26 23:37 GMT+02:00 Frank D. Engel, Jr. <address@hidden>:
>>>
>>> I have not been able to identify any syntax from which to build such an
>>> example.
>>>
>>> I can only see barre syntax which even comes close.
>>>
>>> What I am looking for is a barre that looks like a capo but only on some
>>> strings.
>>>
>>> It should also stay inside the diagram and not wind up floating above it.
>>>
>>>
>>> On 5/26/2015 09:54, Thomas Morley wrote:
>>>>
>>>> 2015-05-26 0:44 GMT+02:00 Frank Engel <address@hidden>:
>>>>>
>>>>> Fretboard diagrams cannot currently be limited to a range of strings.
>>>>>
>>>>> Ideally there should be the ability to show multiple such capos (this
>>>>> is
>>>>> done).
>>>>>
>>>>>
>>>>> My suggested syntax for this would be something like "barre":
>>>>>
>>>>> (partial-capo 5 3 2)
>>>>>
>>>>>
>>>>> Examples of existing diagrams:
>>>>>
>>>>> http://members.myactv.net/~s.wriston/media/CUT_CAPO_CHORD_CHART.pdf
>>>>> http://www.thirdhandcapo.com/basics.html
>>>>
>>>>
>>>>
>>>> Hi Frank,
>>>>
>>>> as far as I can see LilyPond can do already all what your links
>>>> demonstrate.
>>>> Maybe I'm missing something.
>>>> Please provide a code-example where LilyPond fails.
>>>>
>>>> Cheers,
>>>>     Harm
>>>>
>>>
>>
>> Please look at the output from (maybe uncommentthe commented lines):
>>
>> \markup
>>    \override #'(fret-diagram-details . ((barre-type . straight)))
>>    \fret-diagram-verbose
>>     #'((barre 6 5 5)
>>        ;(place-fret 6 5 2)
>>        ;(place-fret 5 5 2)
>>        (place-fret 4 4 1)
>>        ;(place-fret 3 5 3)
>>        ;(place-fret 2 5 3)
>>        ;(place-fret 1 5 3)
>>        (barre 3 1 5))
>>
>> Isn't it what you want?
>>
>> Cheers,
>>    Harm
>>
>
> ok, the straight barre line gets me fairly close...
>
> Is there a way to make it thicker?
>
> Is there a way to combine this with the other barre type (without making
> that one thicker) so that I can show barre chords in combination with the
> capo image?

Look at the example below (yes, it's quite silly, though, we can watch
what happens)

\markup
  \override #'(fret-diagram-details .
                (
                 (barre-type . straight)
                 (dot-radius . 0.4)
                 (capo-thickness . 0.5)
                ))
  \fret-diagram-verbose
   #'((barre 5 3 2)
      (mute 6)
      (capo 1)
      (barre 4 3 4)
      (place-fret 5 6)
      (place-fret 4 4)
      (place-fret 3 4)
     )

capo-thickness can be set independently
dot-radius is used for dots _and_ for the thickness of barre.
We could implement an additional property to control the thickness of barre.
Though, have a look at
http://www.lilypond.org/doc/v2.19/Documentation/internals/fret_002ddiagram_002dinterface
We already have 24(!) properties controlling in fret-diagram-details

Do we really need another one?
What does others think?

>
>
> Regardless, one place this seems to break down is that the dots make it look
> like a finger should be there (where there is a capo), and without the dots,
> this gives me some rather strange results:
>
> \markup
>   \override #'(fret-diagram-details . ((barre-type . straight)))
>   \fret-diagram-verbose
>    #'((barre 5 3 2)
>       (mute 6)
>       (place-fret 5 6)
>       (place-fret 4 4)
>       (place-fret 3 4)
>      )

Clearly a bug.
I fixed it already locally, will create a tracker-issue and provide a
patch, asap


Cheers,
  Harm