Re: Slurred staccato in a tremolo

[Jacques Menu]

Hello Harm,

Couldn’t have even thought of such an expert solution, will all its power...

Congratulations, and thanks!

JM

> Le 8 mars 2015 à 21:46, Thomas Morley <address@hidden> a écrit :
> 
> 2015-03-08 19:25 GMT+01:00 Klaus Blum <address@hidden>:
>> Hi Jacques,
>> 
>> there is already a snippet that might help:
>> http://lsr.di.unimi.it/LSR/Item?id=772
>> <http://lsr.di.unimi.it/LSR/Item?id=772>
>> 
>> Cheers,
>> Klaus
> 
> How about the code below.
> It rewrites and extends said snippet with code from Issue 3088
> 
> 
> 
> \version "2.19.15"
> 
> %% https://code.google.com/p/lilypond/issues/detail?id=3088
> 
> 
> %% FIXME: c&p from stencil.scm -- define-public and remove copy
> #(define (make-bezier-sandwich-stencil coords thick xext yext)
>  (let* ((command-list `(moveto
>                        ,(car (list-ref coords 3))
>                        ,(cdr (list-ref coords 3))
>                        curveto
>                        ,(car (list-ref coords 0))
>                        ,(cdr (list-ref coords 0))
>                        ,(car (list-ref coords 1))
>                        ,(cdr (list-ref coords 1))
>                        ,(car (list-ref coords 2))
>                        ,(cdr (list-ref coords 2))
>                        curveto
>                        ,(car (list-ref coords 4))
>                        ,(cdr (list-ref coords 4))
>                        ,(car (list-ref coords 5))
>                        ,(cdr (list-ref coords 5))
>                        ,(car (list-ref coords 6))
>                        ,(cdr (list-ref coords 6))
>                        closepath)))
>  (ly:make-stencil
>    `(path ,thick `(,@' ,command-list) 'round 'round #t)
>    xext
>    yext)))
> 
> %% FIXME: rewrite generic wrt axes and replace make-parenthesis-stencil
> #(define (make-bow-stencil width height thickness angularity)
> "Create a bow stencil.
> @var{width} is the width of the bow markup.
> @var{thickness} is the thickness of the bow.
> @var{height} is the heigth of the bow.
> The higher the value of number @var{angularity},
> the more angular the shape of the bow."
>   (let* ((line-width 0.1)
>          (base-x (if (< width 0) (- width) 0))
>          (base-y (if (< height 0) (- height) 0))
>          (x-extent (ordered-cons 0 width))
>          (y-extent (ordered-cons 0 height))
>          (left-x (interval-start x-extent))
>          (right-x (interval-end x-extent))
>          (inner-y 0)
>          (outer-y height)
>          (left-end-point (cons left-x inner-y))
>          (right-end-point (cons right-x inner-y))
>          (outer-control-y (+ inner-y (* 4/3 outer-y)))
>          (inner-control-y (+ outer-control-y
>                             (if (< height 0) thickness (- thickness))))
>          ;; keeping angularity allows for refactoring and
>          ;; merging with make-parenthesis-stencil
>          (offset-index (- (* 0.6 angularity) 0.8))
>          (left-control-x (interval-index x-extent offset-index))
>          (right-control-x (interval-index x-extent (- offset-index)))
>          (left-outer-control-point
>             (cons left-control-x outer-control-y))
>          (right-outer-control-point
>             (cons right-control-x outer-control-y))
>          (right-inner-control-point
>             (cons right-control-x inner-control-y))
>          (left-inner-control-point
>             (cons left-control-x inner-control-y)))
> 
>   (make-bezier-sandwich-stencil
>     (list right-inner-control-point
>           left-inner-control-point
>           left-end-point
>           right-end-point
>           left-outer-control-point
>           right-outer-control-point
>           right-end-point
>           left-end-point)
>     line-width
>     x-extent
>     y-extent)))
> 
> %% FIXME: replace make-parenthesis-stencil by this:
> #(define (make-parenthesis-stencil height width thick angularity)
>  (ly:stencil-rotate-absolute
>    (make-bow-stencil height width thick angularity)
>    -90 0 0))
> 
> %% FIXME: c&p from bezier-bow.cc
> #(define (F0_1 x) (* (/ 2 PI) (atan (* PI x 0.5))))
> #(define (slur-height w h_inf r_0)
>   (F0_1 (* (/ (* w r_0) h_inf) h_inf)))
> 
> #(define (make-tie-stencil width thickness direction)
>  (let* ((height-limit 1)
>         (ratio 0.25)
>         (angularity 0.5)
>         (height (slur-height width height-limit ratio))
> 
>         )
>  (make-bow-stencil width (* direction height) thickness angularity)))
> 
> #(define-markup-command (undertie layout props arg)
>  (markup?)
> #:category font
> #:properties ((thickness 1)
>              (offset 2)
>              (direction DOWN)
>              (adjust-length 0)
>              (adjust-x-pos 0))
> "
> @cindex undertie-ing text
> 
> Undertie @var{arg}. Looks at @code{thickness} to determine line
> thickness, and @code{offset} to determine line y-offset.
> 
> @lilypond[verbatim,quote]
> \\markup \\line {
> \\undertie \"undertied\"
> \\override #'(offset . 5)
> \\override #'(thickness . 1)
> \\undertie \"undertied\"
> \\override #'(offset . 1)
> \\override #'(thickness . 5)
> \\undertie \"undertied\"
> }
> @end lilypond"
>  (let* ((line-thickness (ly:output-def-lookup layout 'line-thickness))
>         (thick (* thickness line-thickness))
>         (markup (interpret-markup layout props arg))
>         (x1 (car (ly:stencil-extent markup X)))
>         (x2 (cdr (ly:stencil-extent markup X)))
>         (y2 (cdr (ly:stencil-extent markup Y)))
>         (w (- x2 x1 adjust-length (* 2 line-thickness)))
>         (y (if (positive? direction)
>                (+ line-thickness offset -2 y2)
>                (* line-thickness (- offset))))
>         (tie (ly:stencil-translate
>                (make-tie-stencil w thick direction)
>                (cons (+ line-thickness adjust-x-pos) y))))
>  (ly:stencil-add markup tie)))
> 
> %% taken from
> %% http://lsr.di.unimi.it/LSR/Item?id=772
> %% and rewritten, due to newer syntax possibilities
> #(define ((multiple-dots dots) grob)
>   (let ((stil (ly:script-interface::print grob)))
>     (let loop ((count (1- dots)) (new-stil stil))
>       (if (> count 0)
>           (loop (1- count)
>                 (ly:stencil-combine-at-edge new-stil X RIGHT stil 0.2))
>           (ly:stencil-aligned-to new-stil X CENTER)))))
> 
> tongue =
> #(define-event-function (parser location dots) (integer?)
> "Return a @var{dots} dots, replacing @code{staccato}"
>  #{
>    \tweak #'stencil
>     #(multiple-dots dots)
>    -.
>  #})
> 
> %% a slurred version
> slurred-tongue =
> #(define-event-function (parser location overshoot dots)
>  ((string? "0.3") integer?)
> "Return a @var{dots} dots, replacing @code{staccato}, a bow will be
> printed above
> (or below) those dots.
> @var{overshoot} determines the horizontal alignment of dots and bow.
> Needs to be string, otherwise it can't be made optional.
> "
> #{
>  \tweak #'stencil
>  #(lambda (grob)
>    (let* ((stil ((multiple-dots dots) grob))
>           (stil-x-length (interval-length (ly:stencil-extent stil X)))
>           (dir (ly:grob-property grob 'direction))
>           (over-shoot (string->number overshoot))
>           )
>      (grob-interpret-markup grob
>        #{
>          \markup
>          \override #`(offset . ,(if (= dir DOWN) 5.2 2.2))
>          \override #`(direction . ,dir)
>          \override #`(adjust-x-pos . ,(+ (- over-shoot)(* -0.5 
> stil-x-length)))
>          \undertie
>          \pad-x #over-shoot
>          \stencil $stil
>        #})))
>    -. %% tweak the staccato
> #})
> 
> %%%%%%%%%%%%%%%%%%%
> %% Example
> %%%%%%%%%%%%%%%%%%%
> 
> {
>  \time 3/4
>  \clef "bass"
> %  \voiceOne
>  \repeat tremolo 6 g8\slurred-tongue "0.8" #1 -1
>  \repeat tremolo 6 f8\slurred-tongue #2 \3
>  \repeat tremolo 6 <e g>8\slurred-tongue #3 --
>  \repeat tremolo 6 dis8\slurred-tongue #4 \fermata
>  \repeat tremolo 6 cis8\slurred-tongue #5 -"xy"
>  \repeat tremolo 6 b,8\slurred-tongue #6 _2
>  \repeat tremolo 6 a,8\slurred-tongue #5 _\4
>  \repeat tremolo 6 ges,8\slurred-tongue #4 _\fermata
>  \repeat tremolo 6 fes,8\slurred-tongue #3 _"foo"
> }
> 
> 
> HTH,
>  Harm
> 
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