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Re: Issue 1290 in lilypond: Skyline compaction is going overboard someti


From: Keith E OHara
Subject: Re: Issue 1290 in lilypond: Skyline compaction is going overboard sometimes
Date: Sun, 31 Oct 2010 19:58:14 -0700
User-agent: Opera Mail/10.63 (Win32)

On Mon, 25 Oct 2010 05:38:24 -0700, <address@hidden> wrote:

2) write better docs for this particular [skyline-horizontal-padding] tweak

I talked around my point but didn't make a conclusion.  Docs for the correct 
way to solve this, system-system-spacing, are already good.

One might ask :  Why not increase, or document, skyline-horizontal-padding ?

When skylines are padded, they make a nice cushion shape (image attached) like 
David was asking for.  The cushion does not extend vertically, but that is what 
the various 'padding properties are for.

However, skyline-horizontal-padding consistently pads skylines *wherever* they 
are used, and I found more places where I would not want even half a note-width 
of padding (attached piano music images are with and without).
So I do not think skyline compaction is going overboard at all -- most times.

In the example that opened the issue, I think it is the fact that the notes are 
logically unrelated that makes their interleaving so objectionable.  Therefore 
the response should be tied to the fact that they are from different systems, 
so bump system-system-spacing back up.

The skyline concept is not described at all in the manual.  Instead, the manual 
teaches how to increase padding of individual classes of objects that a user 
might want to space further apart, which I think is the right approach.  Maybe 
we would like some teaching about horizontal padding using minimum-X-extent, 
which I'll think about as I turn from vertical to horizontal spacing in alpha 
testing.

-Keith

Attachment: Pad.png
Description: PNG image

Attachment: Scr.png
Description: PNG image

Attachment: ScrPad.png
Description: PNG image


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