On 11 February 2013 15:32, Paul Morris <p...@paulwmorris.com> wrote:
> On Feb 10, 2013, at 6:09 PM, Eluze <elu...@gmail.com> wrote:
>
>> I never used such transformations, but in
>>
>> /NR 1.6.2 Modifying single staves /(2.17.11) I found:
>>
>> "The clef position and the position of middle C may need to be adjusted
>> accordingly to fit
>> the new lines."
>
> Thanks Eluze. I had actually tried this, as follows:
>
> 1. Set the custom staff line-positions so that they are centered on the
> default staff midpoint (0). This means the direction of stems are
> automatically correct. No Scheme needed.
>
> 2. Set middleCPosition and clefPosition for the staff to adjust the notes and
> clef so they appear at the correct vertical positions on the staff.
>
> (See example code below.)
>
> The only trouble is that any time there's a clef change, you have to manually
> re-do the custom middleCPosition and clefPosition that you had set, since
> each new clef overwrites these staff settings with the default values (not
> your custom values).
>
> I guess ideally the midpoint of the staff would be a customizable Staff
> property (so that stem directions could be correct when using custom staff
> line positions).
>
> And/or it would be handy if there were a way to set what the
> middleCPosition(s) and clefPosition(s) should be for clefs on a given staff
> once, without having to manually reset them with each clef change. So
> basically if there were a way to customize the values that are set for
> middleCPosition and clefPosition for each type of clef, within a given staff.
>
> I'm not sure if there's a way to use Scheme to override the clef setting
> operation to apply custom values instead of the defaults, maybe with a custom
> clef engraver?
>
> I realize we're pretty far into non-standard customization territory here...
>
> Cheers,
> -Paul
>
>
> %%%% BEGIN %%%%
>
> \version "2.16.1"
>
> theMusic = \relative c' {
>
> % adjustments to middleCPosition and clefPosition
> % overwritten by new clef signs
> c4 e g c
> \clef bass
> c,, e g c
> \clef treble
> c e g c
> \break
>
> % manual re-setting required to restore correct positions
> \set Staff.middleCPosition = #-5
> \set Staff.clefPosition = #-1
> c,4 e g c
> \clef bass
> \set Staff.middleCPosition = #-2
> \set Staff.clefPosition = #1
> c, e g c
> \clef treble
> \set Staff.middleCPosition = #-5
> \set Staff.clefPosition = #-1
> c, e g c
> }
>
> \score {
> \new Staff \with {
> \override StaffSymbol #'line-positions = #'( -3 -1 1 3)
> middleCPosition = #-5
> clefPosition = #-1
> }
> {\theMusic }
> \layout {}
> }
>
> %%%% END %%%%
>
>
You can put it all in a variable:
myBass = {
\clef bass
\set Staff.middleCPosition = #-2
\set Staff.clefPosition = #1
}
Vaughan
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