Trevor Bača wrote:
On 8/22/06, Han-Wen Nienhuys <[EMAIL PROTECTED]> wrote:
Hello,
I once made an estimate for doing x-staff chords, for 400 EUR. I think
that would be the most difficult task. If the stems + noteheads work
correctly, adding arpeggios and ties should be relatively easy.
For reference, I insert what I wrote to Hans Forbrich:
Well I had always wondered why the pricing on cross-staff stuff was so
high. I thought it might be because it breaks the Voice model, but I
wasn't sure ...
no, there are 2 issues: how to deal with the Staff/Voice model, and how
to keep the typesetting engine free of cyclic-dependencies. The latter
problem needs to be solved first, then we can invent ways for the
Staff/Voice model to control the typesetting engine.
Well, if Steve or Vivian or Hans or somebody is willing to help out,
then I'm willing to pitch in on the sponsoring too.
I'm about to have cross-staff stuff all over some piano music and also
between different *string* staves as well. So a question.
QUESTION: will the proposed cross-staff implementation path enable
cross-staff stemming and beaming between *nonadjacent* staves (eg, 1st
violins and basses, passing over the 2nd violins, violas and cellos)?
This is fraught with cyclic dependencies. It might be possible, but you
have to have some restrictions, eg.
* the distances between these staves have been fixed in advance.
or
* all x-staff beams are horizontal
or
* stem directions have no influence over spacing.
In general:
* spacing depends on stem directions,
* line breaks depend on spacing
* y-distance between staves depends on line breaks
* beam configurations depend on y-distances
* stem directions depend on beam configurations
hence, if we want x-staff stems, we must have restrictions: currently,
the y-distance between staves is fixed, and this works pretty well for
x-staff beams. There might be other ways to break this cycle, but there
might be other cycles as well.
--
Han-Wen Nienhuys - [EMAIL PROTECTED] - http://www.xs4all.nl/~hanwen
LilyPond Software Design
-- Code for Music Notation
http://www.lilypond-design.com
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