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

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 1061 by shingarov: Pure-height inaccuracy very large when skyline  
significantly non-rectangular
http://code.google.com/p/lilypond/issues/detail?id=1061

When the skylines are significantly non-rectangular, the inaccuracy of the
pure-height estimation may become so large that the output becomes
completely unusable.
The attached example illustrates this point.
True, this one is somewhat artificial, but in the production manuscript of
my users, the problem of bar numbers' spatial relationship to the previous
line's lyrics, leads to empty space and cutoffs larger than 1''.
Especially troublesome are lyric descenders.  For example, the estimator
will always assume the lower part of letter "y" (or "p" or any with a long
descender)  will collide with bar numbers, while in fact it does not; and
because this problem happens on every staff, it adds up, leading to very
large estimation error.

Attachments:
        lyrics.ly  2.6 KB
        lyrics.pdf  195 KB

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