Re: Creating arbitrary lines (or other postscript things)

[Phil Holmes]

----- Original Message ----- 
From: "Andrew C. Smith" <address@hidden>
To: "Phil Holmes" <address@hidden>
Cc: "LilyPond User Group" <address@hidden>
Sent: Monday, November 15, 2010 5:45 PM
Subject: Re: Creating arbitrary lines (or other postscript things)


> > Have you seen this:
> >
> > http://lsr.dsi.unimi.it/LSR/Item?id=662
> >
> >
> > --
> > Phil Holmes

> Thanks--no, I hadn't seen that. I hadn't thought about using glissando 
> before, actually, because it seems to only take arguments within a single 
> voice. Plus, I can't seem
> to start a text span in one voice and end it in another voice.

> Would it make sense to, rather than use glissando or something similar, 
> create a function that takes a syntax similar to the following:

> \lineBegin x y
> \lineEnd x y

> where x is an index so that \lineBegin and \lineEnd may be matched to one 
> another (even across the entire score), and y is the note event (with the 
> NoteHead)
> that the line is drawn from. As a default, I could make any \lineBegin that 
> doesn't have a corresponding \lineEnd sets its \lineEnd to the same as 
> \lineBegin
> (so that the length is 0). At the end of the program, a scheme function 
> could cycle through each set of pairs and draw a dotted line between each 
> pair of
> coordinates, possibly with make-stencil rather than usurping a glissando.

> Does this seem like it's at all reasonable? Storing a list of pairs and 
> going back later to draw all the lines?

I'm sure it could do - although I doubt it would be used too much and so 
even if such an enhancement were formally requested I think it unlikely it 
would be implemented any time soon.  There is likely to be someone along 
here soon who could tell you how to do this in scheme...  (Not something I 
can do, I'm afraid).

--
Phil Holmes