Hi Nick,
I was trying to make a callback function to lengthen LV ties (thanks to
> David Nalesnik for his help). It works fine when applied to single notes,
> but on a chord, only one of the two ties is lengthened. Is this due to an
> error in the code below or some more deep-rooted problem. If I reverse the
> order of the notes in the chord, the long and short ties swap around:
>
Instead of overriding the property directly, I set 'control-points within
an override of 'before-line-breaking. Seems to to the trick:
\version "2.15.30"
#(define ((alter-lv-tie-curve offsets) grob)
(let ((coords (ly:semi-tie::calc-control-points grob)))
(define (add-offsets coords offsets)
(if (null? coords)
'()
(cons
(cons (+ (caar coords) (car offsets))
(+ (cdar coords) (cadr offsets)))
(add-offsets (cdr coords) (cddr offsets)))))
(add-offsets coords offsets)))
\relative c'' {
\override LaissezVibrerTie #'before-line-breaking = #(lambda (grob)
(set! (ly:grob-property grob 'control-points)
(if (= UP (ly:grob-property grob 'direction))
((alter-lv-tie-curve '(0 0 0.75 0.7 2.25 0.7 3 0)) grob)
((alter-lv-tie-curve '(0 0 0.75 -0.7 2.25 -0.7 3 0)) grob))))
<c f,>1\laissezVibrer
<f, c'>\laissezVibrer
<c f c' f>\laissezVibrer
}
-David
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