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Re: Springs and rods

From: Urs Liska
Subject: Re: Springs and rods
Date: Thu, 23 Jul 2020 11:24:33 +0200
User-agent: Evolution 3.36.4-1

Hi Andrew,

thanks for raising this question I have always been too afraid to ask


Am Donnerstag, den 23.07.2020, 19:15 +1000 schrieb Andrew Bernard:
> There are some things in lilypond that I just think are not explained
> anywhere. What is this springs-and-rods business? For Hairpins, I
> read
> this?
> minimum-length (dimension, in staff space):
> 2.0
> Try to make a spanner at least this long, normally in the horizontal
> direction. This requires an appropriate callback for the
> springs-and-rods property. If added to a Tie, this sets the minimum
> distance between noteheads.
> And:
> springs-and-rods (boolean):
> ly:spanner::set-spacing-rods
> Dummy variable for triggering spacing routines.
> With all due respect to our fantastic developers, I find this
> unintelligible and less than helpful. What is springs-and-rods
> supposed to be set to: ly:spanner::set-spacing-rods, or ##t, or ##f
> and when, and why? What exactly is meant by 'dummy' in this context?
> I use that word to mean a temporary placeholder, but there are many
> usages. WHat is 'an appropriate callback'? No example is provided.
> If I had any idea at all about this I would write a small section in
> the NR on it and submit it, but I am stumped. if this _is_ in the NR,
> please let me know.
> Andrew

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