Re: Changing Laissez Vibrer ties for chords

[Simon Albrecht]

On 27.03.2016 06:09, dtsmarin wrote:
> Please I need some help..this code doesn't work for me. Version 2.19.38

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Dimitris,

many people, like I, don’t use the Nabble interface, and for them this 
e-mail will not make any sense without it’s context. You’re much likely 
to get help if you start a new thread, include an actual code example 
(referring where you got it from, and what it should do), and tell us 
what exactly happens that it fails to meet expectations.
I’ve done that for you:
The following code

%%%%%%%%%%%%%%%%

\version "2.19.25"

shapeLVTieColumn =
#(define-music-function (parser location all-offsets) (list?)
   #{
     \override LaissezVibrerTieColumn.before-line-breaking =
     #(lambda (grob)
        (let ((ties (ly:grob-array->list (ly:grob-object grob 'ties))))
          (for-each
           (lambda (tie offsets)
             (set! (ly:grob-property tie 'control-points)
                   (map
                    (lambda (x y) (coord-translate x y))
                    (ly:tie::calc-control-points tie)
                    offsets)))
           ties all-offsets)))
   #})


\relative c, {
  \time 3/4
  \key a \major
  \clef bass
  \shapeLVTieColumn #' (
                       ((1 . 0) (2 . 0) (3 . 0) (17 . 0))
                       ((1 . 0) (2 . 0) (3 . 0) (4 . 0))
                       )
  <a a'>2. \laissezVibrer |
}
%%%%%%%%%%%%%%%%%%%%

works fine with v2.19.16, but with 2.19.25 I get an error:

document.ly:14:21: In procedure ly:calc-control-points in expression 
(ly:tie::calc-control-points tie):
document.ly:14:21: Wrong type argument in position 1 (expecting Wrong 
kind of Grob): #<Grob LaissezVibrerTie >

And now someone who knows how the behaviour of 
ly:tie::calc-control-points has changed can chime in and give a solution.

Best, Simon