Re: Tweaking notehead direction in chords

[Paul Morris]

On Dec 27, 2012, at 9:38 AM, Thomas Morley <address@hidden> wrote:

> Hi Paul,
> 
> approved as
> http://lsr.dsi.unimi.it/LSR/Item?id=861
> 
> I added some small changes.
> Could take them back, if you want.
> 
> Many thanks for contributing,
>  Harm

Hi Harm,  That's great, thanks!  

Unfortunately, I ran into a problem when using this snippet with beams set with 
square brackets.  Here's a tiny example (see attached file for full tiny 
example):

    <cis'' e''>16[  \displaceHeads #'(-1 0) <d'' f''>] 


This leads to the following error (without the square brackets there is no 
error):

__________________
Parsing...
Interpreting music...
Preprocessing graphical 
objects.../Applications/LilyPond.app/Contents/Resources/share/lilypond/current/scm/output-lib.scm:133:10:
 In procedure - in expression (- (ly:stem::pure-calc-stem-end-position grob 0 
...) beg):
/Applications/LilyPond.app/Contents/Resources/share/lilypond/current/scm/output-lib.scm:133:10:
 Wrong type: calculation-in-progress
Exited with return code 1.
___________________


Without looking into it any further, my best guess is that calculating the stem 
width does not work because the stem grob has not been generated before the ] 
is reached, or something like that?  Any thoughts on how to best work around 
this?  

Thanks,
-Paul

shift-note-heads-problem.ly
Description: Binary data