Re: Piano/Xylophone key diagrams

[Simon Bailey]

that is cool! :D i've been using lilypond for 10 years and it
sometimes still surprises me at how powerful it is... ;)

On Sun, Oct 13, 2013 at 3:17 PM, Phil Holmes <address@hidden> wrote:
> ----- Original Message ----- From: "Thomas Morley"
> <address@hidden>
> To: "David Kastrup" <address@hidden>
> Cc: "lilypond-user" <address@hidden>
> Sent: Saturday, October 12, 2013 2:29 PM
> Subject: Re: Piano/Xylophone key diagrams
>
>
>> 2013/10/12 David Kastrup <address@hidden>:
>>>
>>> "Phil Holmes" <address@hidden> writes:
>>>
>>>> At college, one of my ensembles is a mixed-music group performing
>>>> modern music.  I normally get away with singing or "playing" a
>>>> triangle and bits of other untuned percussion.  Imagine my surprised
>>>> when I was given a xylophone piece to play.  Fortunately, it's only
>>>> one note at a time, and most of them are the same note, repeated for
>>>> four bars, so I generally have the time to work out where the next key
>>>> is when I'm playing the current one.  However, I thought it might be
>>>> interesting and vaguely useful to have some piano key diagrams which
>>>> show which key is to be played, rather like the fingering diagrams.
>>>> The attached image illustrates the kind of thing: playing D#.
>>>>
>>>> I know I could use box, rounded-box or filled-box, or moveto/lineto
>>>> commands to draw the boxes, so I clearly could create the diagrams
>>>> individually for each note.  However, I thought it would be better to
>>>> create a function to do this.  I'd presume the location of each box
>>>> would be in some sort of array/list, and that the function would use
>>>> the 'pitch of the note to determine which to fill.  However, I've read
>>>> our documentation on scheme and am stuck on how to start, either
>>>> creating the array/list and iterating over it to draw boxes, or
>>>> grabbing the pitch value of a note.
>>>>
>>>> Could anyone start me off on this and help when I get stuck again?
>>>
>>>
>>> Starting off would be on
>>> <URL:http://code.google.com/p/lilypond/issues/detail?id=3563#c4>.  Check
>>> its output.  This is basically what you need, except that you need to
>>> replace the C-Griff function which uses filled and non-filled circles in
>>> a three-row arrangement with a more tedious rectangular arrangement.
>>>
>>> The c-griff function here only does the formatting and would need to be
>>> completely replaced.  In contrast, the stuff in define-scheme-function
>>> could be kept unchanged.
>>
>>
>> Or maybe
>> http://lsr.dsi.unimi.it/LSR/Item?id=791
>> might give some inspiration.
>>
>> Cheers,
>>  Harm
>
>
> Thanks to David and Harm for their suggestions.  For now I've gone with
> adapting what Harm suggested - I've tidied the code a little and added a
> scaling parameter that varies the width of the keys and the size of the dot.
> Example output is attached, together with the file used to create this.
>
> --
> Phil Holmes
> _______________________________________________
> lilypond-user mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/lilypond-user
>



-- 
Do not meddle in the affairs of trombonists, for they are subtle and
quick to anger.