Re: Creating arbitrary lines (or other postscript things)

[Phil Holmes]

Andrew,

What is it about a glissando that doesn't give you what you want?

--
Phil Holmes


----- Original Message ----- 
From: "Andrew C. Smith" <address@hidden>
To: <address@hidden>
Sent: Monday, November 15, 2010 2:08 PM
Subject: Creating arbitrary lines (or other postscript things)


Dear users,

I'm working on a piece of music where certain notes need to be connected by 
dotted lines. I've tried a few different things: using \glissando and 
overriding the stencil to get a different position, or just creating \markup 
with a stencil object. I've also tried writing it in postscript (which seems 
to be the ideal solution) but I can't figure out how to return certain 
values of the notehead object. I'd like to avoid drawing the lines in by 
hand later, because I want to generate scores algorithmically.

What would be ideal (as far as I can tell) is to have a global variable 
that's a list of pairs of ly:music, then at the end of the program run a 
function to cycle through this list and draw dotted lines between all the 
pairs. My problem is that I can't figure out how to get the x/y position of 
the NoteHead object from a string of text like "d4", because as far as I've 
seen (and this may be way wrong, so forgive me) the interfaces generally are 
built for modifying values, not returning values for use in other functions. 
Any ideas? Or, at least places I should have already looked?

Have to admit I don't know Lilypond super well, but I've googled this 
problem pretty hard and read the manual looking specifically for it. I know 
mostly C-related languages, so Scheme is kind of bending my brain a little. 
Any help from more experienced users would be excellent.

Thanks,

Andrew
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