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Issue 1056 in lilypond: Pure-height estimation ignores visibility and le
Issue 1056 in lilypond: Pure-height estimation ignores visibility and length of stems
Sun, 04 Apr 2010 03:15:35 +0000
Labels: Type-Defect Priority-Medium
New issue 1056 by shingarov: Pure-height estimation ignores visibility and
length of stems
Consider a score where stems account for aq significant percentage of the
system's height; one example is attached: "visible.ly", "visible.pdf".
Now consider what will happen if we turn the stems off, by setting
'transparent=#tt (*not* by removing the stem engraver - see bug 15). The
page spacer now places staffs closer together, by way of the staff's (real,
non-pure) height now being smaller. However, the pure height stsays at
the same value, causing an ugly empty space at page bottom. This
divergence between the height and pure-height, does not go away even when I
set Staff.Stem 'length=#0; see example "invisible.ly", "invisible.pdf".
Note 1: The described situation may seem very artificial and with obscure
applicability, but it is a blocker in a formatting situation in a
real-world paper publication.
Note 2: This was not observed before because it was masked by bug 1053
(which was causing more grave trouble with pure-height estimation than
this). The bug becomes unmasked after applying the patch fixing 1053.
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