Re: how offsets and alignment works: an explanation

[David Nalesnik]

Hi,

On Tue, Apr 16, 2013 at 9:01 AM, Urs Liska <address@hidden> wrote:

Am 16.04.2013 14:07, schrieb Richard Shann:

On Tue, 2013-03-26 at 10:29 +0100, Urs Liska wrote:

BTW we're preparing the release of a LilyPond toolbox library (where
\displayControlPoints will be included of course), and I'd love to
include this new one there too.

I've been trying to track down where this code might be - the last email
in the thread
http://www.mail-archive.com/address@hidden/msg34439.html
  ends with a snippet which fails on execution

Drawing systems...test.ly:28:6: In procedure memoization in _expression_
(if (eq? line #t) (begin #) ...):
test.ly:28:6: In file "test.ly", line 27: Missing or extra _expression_ in
(if (eq? line #t) (begin (ly:stencil-add (make-line-stencil 0.05 (car
(first cps)) (cdr (first cps)) (car (second cps)) (cdr (second cps)))
cps)) (car (third cps)) (cdr (third cps))).

this is with 2.16.2

Richard Shann

I can't tell this right now, but it may very well be that this is due to syntax changes after 2.16.
The code which we use (with 2.17.3) is still in our private library.
When we will (hopefully soon) work on transfering stuff to the new public location we'll surely review these functions again and may also find solutions to work with different LilyPond versions.
You can see a screenshot here http://a.fsdn.com/con/app/proj/openlilylib/screenshots/OLLib-ctrl-pts-colors.png in the meantime. I'm sure it would fit very well to your endeavours (judging from the latest video).

Urs

When I recently cut-and-pasted the code from the email, I had this same problem.  IIRC, the only problem was that a long comment line had been broken across lines.  Just add the semicolon to the beginning of the added line and all should be well.

HTH,

David