Re: Chapter "Collision resolution"

[David Kastrup]

"Trevor Daniels" <address@hidden> writes:

> David Kastrup wrote Wednesday, January 12, 2011 2:24 PM
>
>> Hi, I'm taking a look at the notation manual under "Collision
>> Resolution".
>>
>> The first beat on the second bar in the example has bad output
>> (merges
>> an eighth and a half note while inexplicably keeping the eighth's
>> note
>> head).
>
> This is bad!  But it is not a problem caused by merging
> notes in different voices, almost the opposite.  It is
> caused by the \oneVoice predef in voice 3 at the start of
> bar 2, which removes the shift normally associated with
> voiceThree.  As there is no shift the notes are simply
> printed one on top of the other.  \oneVoice is intended
> to be used when polyphony is not required, so it is being
> misused here.

Polyphony is not required here, as a proper notehead merge will do the
trick, like the fourth example shows.  The fourth example is correct
after shifting an _unrelated_ notehead.

But \mergeDifferentlyHeadedOn is used in the two examples before
already.  Why does it only start working correctly in the fourth
example?

>> Can we do better?
>
> Yes.  A better example should be found.

I think we should first figure out why \mergeDifferentlyHeadedOn does
not work properly without shifting a note head _unrelated_ with the
collision.

After we get \mergeDifferentlyHeadedOn to work properly on examples two
and three, example four is a step backwards, and we should indeed find
something better.

But not while \mergeDifferentlyHeadedOn misbehaves.

-- 
David Kastrup