Re: Potential issue 39 fix w/ patch

[Keith OHara]

-------- Original Message --------
> From: "Mike Solomon" <address@hidden>
> Sent: Thursday, January 06, 2011 10:03 AM
>

Mike,
 The patch moves 8th notes unnecessarily.
 The patch breaks the collision resolution of dotted notes.
 If you have to move the notehead, you're moving it the wrong direction.  

Test music attached.  I notice that LilyPond moves an undotted upstem note 
to the left, away from a dotted note, but usually the first priority is to 
keep simultaneous noteheads as close as possible.  For perspective, I 
included a couple collisions LilyPond has never tried to resolve 
automatically. (The last one is allowed intentionally, surprisingly, see 
code comments regarding the boolean 'touch'; there might be a very good 
reason, or it might have been a mental slip. Either way, the LearningManual 
has a "real music example" to teach users how to resolve what LilyPond 
cannot.)

So I suggest 
1) lengthening the stem, selectively, based on duration_log and the 
appropriate collision-sense booleans; or
2) treating notes with big flags as if the were dotted, because the 
dangling flag creates a conceptually similar situation.

Later I'll post the image of desired output, or better desires if we have 
any, on issue 39.

39.ly
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test.preview.png
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desire.preview.png
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