On 2016-11-15 09:21, David Kastrup wrote:
Andrew Bernard <andrew.bern...@gmail.com> writes:
Hi Robert,
I for one don't think lilypond should be making decisions for you about tie
direction based on an idea of sequenced phrases. I know lilypond strives to
do as much good layout as it can without requiring tweaks, but this seems a
step too far. There is nothing mentioned about this in the NR as far as I
know. I would say it is undesirable, and a defect. Others may differ. I
would go so far as to attempt to raise this as a bug on the bug list for
further evaluation.
Looks random to me, actually. Like depending on the order of stuff in
memory. The kind of stuff which could be different on a different
computer. Or even next time you try it.
Just a very vague gut feeling: rounding issues? IIUC, Lilypond
determines an "uglyness" score [1] for both variants and chooses the
least unattractive one. If both directions are next to indistinguishable
(but, e.g., the slightly imprecise horizontal position might be an
intermediate value in the computation), the outcome will appear random.
Can one see and compare the uglyness scores for the variants considered?
[1]: http://lilypond.org/doc/v2.18/Documentation/essay/automated-engraving
Cheers,
Alexander
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