Hi Jan-Peter, First of all, I agree with David Kastrup that this is a situation where a deep fix is in order so that simultaneous ties may be tweaked directly.
Your example is working as expected :)
>
Glad to hear it!
>
> To make it (more) usable, I think, we need wrapper functions, to avoid
> twiggling with endless listoflistoflistofnumberpairs ;-)
>
+1
> In my short test, I thought of having tie-configuration and shape
> combined, so that one can set the direction of the ties, before shaping
> them. The downside is, that using this also needs the staff-positions to be
> set - so I doubt, this is useful:
>
This is a useful combination, and setting staff-positions really isn't all
_that_ inconvenient since you can include a "non-entry" for default ties.
I'm delighted to see that overrides of the two work together! It's nice
to be able to group both functionalities into one command.
One question I have here with your formulation concerns the way you've
expanded the overrides. Why not use #{ . . . }# syntax here? The only
drawback I see is that dollar-signs would be needed with 2.14. I don't see
any issues in 2.15.40 with the replacement I've done below:
>
> --snip--
> confShapeTieColumn =
> #(define-music-function (parser location conf all-offsets)(list? list?)
> (let ((alb-func (lambda (grob)
>
> (let ((ties (ly:grob-array->list (ly:grob-object grob
> 'ties))))
> (for-each
> (lambda (tie offsets-for-broken-pair)
> (let* ((orig (ly:grob-original tie))
> (siblings (ly:spanner-broken-into orig)))
> (for-each
> (lambda (piece offsets-for-piece)
> (if (pair? offsets-for-piece)
> (set! (ly:grob-property piece
> 'control-points)
> (map
> (lambda (x y) (coord-translate x
> y))
> (ly:tie::calc-control-points piece)
> offsets-for-piece))
> ))
> (if (null? siblings)
> (list orig)
> siblings)
> offsets-for-broken-pair)))
> ties all-offsets)))
> ))
#{
\once \override TieColumn #'tie-configuration = #conf
\once \override TieColumn #'after-line-breaking = #alb-func
#}))
To be complete, you would need to extend this so that the
'tie-configuration override applies to tie columns across a line break as
well. Of course you could easily modify what you have above.
In the attached file, I've approached the problem in a different way.
Rather than combining the two overrides as you do, I use two separate
overrides. This enables me to override 'tie-configuration with a music
function which I made to modify broken spanners in a generalized way. (If
you want to see more examples of usage of \alterBroken I can attach a file
demonstrating it.) My example isn't the greatest, since I didn't use
'tie-configuration to change any directions--meaning that it's simple to do
it all with \shapeTieColumn--but you get the idea.
[BTW, I love how it's now possible to put \once before a music function!]
> For completeness I created drafts for RepeatTieColumns and
> LaissezVibrerTieColumns. Note that after-line-breaking is reasonably not
> called, so I used before-line-breaking here:
>
Nice! Thank you for doing this!
Best,
David
shape-tie-columns.ly
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