Re: override

[Mats Bengtsson]

Now I realize that my previous answer wasn't completely correct, since
you had defined your own macro for this articulation. Since you used
\markup, the layout object is indeed called TextScript and nothing else.

The extra-offset property specifies how you want to move the object
relative to its normal position. So, you can always try first without
the \override to see where LilyPond wants to put the object, then you
can figure out where you want to move it.
The first number is the horizontaldistance and the second number is the
vertical distance. As all other distances, 1 corresponds to the distance
between two staff lines.

I think your real question is: Where does LilyPond normally place text
scripts? The horizontal placement is simple, that's just centered above
the note. For the vertical position it depends on the pitch of the note.
If the note is within the stave (between d' and e'' if you have a G
clef), then the text script is placed above the top of the stave and
the distance from the stave to the text is determined by the 'padding'
property. If the pitch is higher so the note is above the stave, then
the distance is calculated from the note instead.
In short, the text is placed high enough so it's at least 'padding'
above both the note and the stave.

   /Mats

Jean-marc LEGRAND wrote:
> Hi list.
>
> On XP lily2.4.2, I use to define :
>
> tr = \markup {\musicglyph #"scripts-rcomma"}
>
> and make : \once \override TextScript #'extra-offset = #'(2.1 . -1.7) a8^\tr, 
> for example, which
> puts a comma just after the note (ancoent way to indicate a trill in baroque 
> music).
>
> the thing is that I can't understand what the -1.7 respresents exactly. I 
> always indicate this
> number in a relative way (considering other tr around). But I can't say "for an 
> A, the override is :
> \override TextScript #'extra-offset = #'(2.1 . -1.7) , for a B :  \override 
> TextScript
> #'extra-offset = #'(2.1 . -2.5)" , and so on.
>
> Can anyone explain to me what these numbers really mean ?
>
>
>
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--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
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