Re: Issue 1061 in lilypond: Pure-height inaccuracy very large when skyline significantly non-rectangular

[lilypond]

Comment #2 on issue 1061 by Vialena.Parvy: Pure-height inaccuracy very  
large when skyline significantly non-rectangular
http://code.google.com/p/lilypond/issues/detail?id=1061

> factor out axis-group-interface.cc:231-265 into a
> separate function and to modify it so that it uses
> begin_of_line_extent or end_of_line_extent whenever
> it encounters a VerticalAxisGroup.

Hmm, the problem may be more fundamental then.  For one of those "various  
other
objects", how do we decide if it is part of begin or rest?  So far only the
VerticalAxisGroup knows about the concept of "begin/rest".

Well, sure, VerticalAxisGroup is software, too, so we could try to refactor  
its logic
it uses for classifying grobs into begin and rest; I have not studied how  
it does it,
the algorithm may be applicable to other things (e.g. if it is  
geometry-based, like
is the position of the thing close to the left), or it may not (e.g. if it  
is based
on the kind of object, but then it would be broken anyway).

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