On 14/01/17 19:57, Richard Shann wrote:
> On Sat, 2017-01-14 at 18:14 +0000, J Martin Rushton wrote:
>> Hi,
>> I'm trying to set a melody from a 19thC source as closely as possible to
>> the original. Triplets are indicated with a curved bracket rather than
>> the square one Lily uses by default. I've come up with a mechanism:
>>
>> \relative c'' {
>> \tupletUp
>> \override TupletBracket.bracket-visibility = ##f
>> \tuplet 3/2 { c8( c c ) }
>> }
>>
>> but using a slur in this way seems wrong. Is there a better way?
>
> yes!
>
>> I'm
>> using Lily 2.14 in this instance.
> That might be a problem. The solution lies in some code posted a month
> or two back on this list:
>
> tupletBracketToSlur = {
> % Use slur-stencil
> \\override TupletBracket.stencil = #ly:slur::print
> %% Use 'thickness from Slur
> \\override TupletBracket.thickness = #1.2
> %% 'control-points need to be set
> \\override TupletBracket.control-points =
> #(lambda (grob)
> (let* ((x-pos (ly:grob-property grob 'X-positions))
> (pos (ly:grob-property grob 'positions))
> (x-ln (interval-length x-pos))
> (dir (ly:grob-property grob 'direction))
> ;; read out the height of the TupletBracket, maybe
> negative!
> (height (- (cdr pos) (car pos)))
> ;; height-corr is introduced because sometimes the shape of
> the
> ;; slur needs to be adjusted.
> ;; It is used in the 2nd/3rd control-point.
> ;; The value of 0.3 is found by trial and error
> (height-corr (* 0.3 dir height))
> (edge-height (ly:grob-property grob 'edge-height '(0.7 .
> 0.7)))
> (pad 1.0))
> (list
> ;; first cp
> (cons
> (+ (car x-pos) 0.5)
> (- (+ (* dir pad) (+ (car pos) (* -1 dir (car
> edge-height))))
> (if (= dir -1)
> (if (> height 3)
> (/ dir 2.0)
> 0.0)
> (if (< height -3)
> (/ dir 2.0)
> 0.0))))
> ;; second cp
> (cons
> (+ (car x-pos) (* x-ln 1/4))
> (+ (* dir pad) (+ (car pos) (* dir (+ 0.5 height-corr)))))
> ;; third cp
> (cons
> (+ (car x-pos) (* x-ln 3/4))
> (+ (* dir pad) (+ (cdr pos) (* dir (- 0.5 height-corr)))))
> ;; fourth cp
> (cons
> (- (cdr x-pos) 0.5)
> (+ (* dir pad) (+ (cdr pos) (* -1 dir (cdr edge-height)))))
> )))
> \\override TupletBracket.staff-padding = #'()
> #(define (invert-direction x) (if (eq? UP
> (ly:tuplet-bracket::calc-direction x)) DOWN UP))
> \\override TupletBracket.direction = #invert-direction
> }
>
>
> then you put \tupletBracketToSlur in a \layout{ } block.
>
> I've just cut-and-pasted this codefrom the command in Denemo that
> inserts this stuff for you.
>
> Richard
I've just cut and pasted that into the file and the first line starts
throwing syntax errors:
--------------%<------------
Processing `.../file.ly'
Parsing...
.../file.ly:13:1: error: unrecognized string, not in text script or
\lyricmode
tupletBracketToSlur = {
.../file.ly:13:21: error: syntax error, unexpected '='
tupletBracketToSlur
= {
.../file.ly:105:25: error: syntax error, unexpected '}'
}
fatal error: failed files: ".../file.ly"
exited with status: 1
-------------%<------------
I'm guessing things aren't that simple, can I mix scheme and LP in the
same input file? I don't have access to the code, this is embedded
within a larger application. At present all I have is a \relative { ...
} block, all the meody lies within that.
Regards,
Martin
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