Dear LilyPond developers,
as some of you may already know we have in Frescobaldi started to
develop a tool where the user could graphically set offsets, change the
curve of slurs and so forth. For this purpose we're using a SVG viewer
where the user can change certain elements. In order to see what can be
done I've today done some testing of how offsets in the code affects the
SVG output.
When you set an offset like this:
\override TextScript.extra-offset = #'(0.3 . 0.3)
The unit of the change is as I understand it staff spaces. From using
different staff sizes I've concluded that the unit in the SVG file is
also staff spaces, so when I set an offset of 0.3 in the code the
difference in the SVG file will also be 0.3.
(In the SVG definition I read:
The supported length unit identifiers are: em, ex, px, pt, pc, cm, mm,
in, and percentages.
I guess relational units as em or even % could equal staff spaces in
this case...)
Except wanting to confirm that I'm making the right conclusions here, my
question is: could we always count on such a simple relation between the
unit used to make layout changes in the code and the units used in the
SVG file or there are exceptions to this? We will of course find this
out eventually but we're keen to learn more of the potential of this
approach.
Best
Peter
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