On Apr 22, 2011, at 11:29 PM, Han-Wen Nienhuys wrote:
> On Fri, Apr 22, 2011 at 6:20 PM, <[email protected]> wrote:
>>
>> \new Staff {
>> <<
>> { \voiceOne s16 fis'' }
>> \\
>> { \voiceTwo e4 e }
>> \\
>> { \voiceFour
>> f''8 e'' gis'' gis'' }
>>
>> }
>>
>> One interesting thing is that it is the stems, not the noteheads, that
>> are pushing this down. If you remove stems from the
>> beam-collision-engraver, this problem does not arise. Why would stems
>> do this but not note heads?
>
> The problem is that the initial guess for the configuration has two
> choices: over all 'big' collisions, and below the big collisions. The
> separate high note adds a collision that is impossible to pass from
> the top, so we revert to the bottom.
>
\new Staff {
<<
{ \voiceOne s16 \grace fis'' }
\\
{ \voiceTwo e4 e }
\\
{ \voiceFour
f''8 e'' gis'' gis'' }
>>
}
Even with a small high note (see above) the problem kicks in.
If you want, I have some time next week to put in printf's and see what the
exact numerical cutoff is for picking the lower solution. My first commitment
is to have a look @ Janek's flag code, and then I can look over the beam code.
Cheers,
MS
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