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Re: improved accidental algorithm (with images)
From: |
Jan Nieuwenhuizen |
Subject: |
Re: improved accidental algorithm (with images) |
Date: |
Fri, 26 Jul 2002 18:09:07 +0200 |
User-agent: |
Gnus/5.090006 (Oort Gnus v0.06) Emacs/21.2 (i386-debian-linux-gnu) |
Werner LEMBERG <address@hidden> writes:
> As soon as I know how to shift accidentals, I will provide images.
> Here my algorithm again, this time with images.
Thanks. Images help a lot to get started.
> I forgot to put Wanske's book into my travelling baggage -- can
> someone please test my algorithm against her collected devils?
I'm sorry not to have responder earlier; I was certain that Han-Wen
had our copy of Wanske; and until now I didn't know anything about
accidental (re)ordering rules. This afternoon, I took a brief look at
Wanske. She lists some rules of which the most important seem to be:
* highest-y accidental first, then lowest, then next highest etc.
* x-position of accidentals take after x-position of noteheads in
chords
* accidentals for octaves always have same x-position (unless maybe
this eats too much x-space in chords with accidentals on
seconds). See Fig 2.
* accidentals on seconds are kerned extra tightly to the note heads
but it looks like you knew that.
Then, there's a kerning table for type of accidental and note
intervals in chord. Most important is, not to use more space than
necessary.
As I'll be going on vacation tomorrow, I haven't analyzed your
algorithm yet, but I'll take a good look at it when I'm back.
Looking at the pictures, your algorithm solves a number of bugs, and
even get things almost right in hairy cases.
However, I don't understand why in your chord3.png, you put the flat
closer to the chord than the c's natural sign. See Fig 1.
Greetings,
Jan.
m-page1.png
Description: fig 1 (chord3 redo)
n-page1.png
Description: fig 2
--
Jan Nieuwenhuizen <address@hidden> | GNU LilyPond - The music typesetter
http://www.xs4all.nl/~jantien | http://www.lilypond.org