On Wed, Nov 18, 2009 at 3:39 PM, Nick Payne <nick.pa...@internode.on.net>wrote:
> Following example shows a problem I have in a score with multiple voices
> where I want the TextSpanner for a barre to be two bars long. Because the
> actual notes in the two bars are split between the voices, I have the
> \stopTextSpan on the silent eighth note at the end of bar two in voiceOne,
> but it is terminating as if I had it on the B flat at the start of the bar.
> In fact there is no difference in the output between having the
> \stopTextSpan on the B flat or s8. Why is this?
>
> %================================================================
> \version "2.13.7"
>
> barre = #(define-music-function (parser location fretnum dirn shorten
> adjBreak adjEnd)
> (string? number? pair? number? number?)
> #{
> \once \override TextSpanner #'bound-details #'left #'text =
> \markup { \small { \concat { "C" "." $fretnum " " } } }
> \once \override TextSpanner #'style = #'line
> \once \override TextSpanner #'font-shape = #'upright
> \once \override TextSpanner #'direction = #$dirn
> \once \override TextSpanner #'bound-details #'right #'text = \markup {
> \draw-line #(cons 0 (/ $dirn -1)) }
> \once \override TextSpanner #'bound-details #'left #'stencil-align-dir-y
> = #CENTER
> \once \override TextSpanner #'bound-details #'left #'padding = #(car
> $shorten)
> \once \override TextSpanner #'bound-details #'right #'padding = #(cdr
> $shorten)
> \once \override TextSpanner #'bound-details #'right-broken #'padding =
> #$adjEnd
> \once \override TextSpanner #'bound-details #'left-broken #'X =
> #$adjBreak
> \once \override TextSpanner #'bound-details #'left-broken #'text = ##f
> \once \override TextSpanner #'bound-details #'right-broken #'text = ##f
> #})
>
> \relative c' {
> \time 5/8
> \new Staff
> <<
> \new Voice = "first"
> { \voiceOne \barre "6" #UP #'(-0.5 . -1) #5 #1 bes8\startTextSpan
> f' aes d_( e) |
> bes'4 s4 s8\stopTextSpan |
> }
> \new Voice= "second"
> { \voiceTwo
> s2 s8 |
> bes f e aes, e' |
> }
> >>
> }
> %================================================================
>
>
Hi Nick,
I can't explain what's going on exactly, but transparent rests fix this one
nicely:
%================================================================
\version "2.13.7"
barre = #(define-music-function (parser location fretnum dirn shorten
adjBreak adjEnd)
(string? number? pair? number? number?)
#{
\once \override TextSpanner #'bound-details #'left #'text =
\markup { \small { \concat { "C" "." $fretnum " " } } }
\once \override TextSpanner #'style = #'line
\once \override TextSpanner #'font-shape = #'upright
\once \override TextSpanner #'direction = #$dirn
\once \override TextSpanner #'bound-details #'right #'text = \markup {
\draw-line #(cons 0 (/ $dirn -1)) }
\once \override TextSpanner #'bound-details #'left #'stencil-align-dir-y =
#CENTER
\once \override TextSpanner #'bound-details #'left #'padding = #(car
$shorten)
\once \override TextSpanner #'bound-details #'right #'padding = #(cdr
$shorten)
\once \override TextSpanner #'bound-details #'right-broken #'padding =
#$adjEnd
\once \override TextSpanner #'bound-details #'left-broken #'X = #$adjBreak
\once \override TextSpanner #'bound-details #'left-broken #'text = ##f
\once \override TextSpanner #'bound-details #'right-broken #'text = ##f
#})
\relative c' {
\time 5/8
\new Staff
<<
\new Voice = "first"
{ \voiceOne \barre "6" #UP #'(-0.5 . -1) #5 #1 bes8\startTextSpan
f' aes d_( e) |
bes'4
\override Rest #'transparent = ##t
r4 r8\stopTextSpan
\revert Rest #'transparent
|
}
\new Voice= "second"
{ \voiceTwo
s2 s8 |
bes f e aes, e' |
}
>>
}
%================================================================
Intuitively I always imagine skips as meaning "don't do any engraving work
here." I don't know if that's actually an (or the) intended meaning skips or
not, but it helps me remember that are a very few -- but important -- gotcha
differences between skips and (transparent) rests, this situation with the
spanners being one of them.
HTH,
Trevor.
--
Trevor Bača
trevorb...@gmail.com
<<attachment: transparent-rests.png>>
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