Re: Horizontal spacing algorithm

[Chad Linsley]

Hi Simon, 

Hardly an assertion when I used brackets and a question mark around the word “simple”. Anyway, the paper points out that Lilypond uses a version of Gourlay’s algorithm which works great except in examples like the ones he gives (polyrhythms). I’m aware that you can use proportional notation and uniform stretching to fix these examples. However, I find it interesting that the proposed solution incorporates what Lilypond actually does already (which is why it might not be as complicated as it seems). Am I the only one that is curious about this? Why does the horizontal spacing of the now-ancient SCORE software still look so good (in my opinion)? 

C

On Sun, Aug 25, 2019 at 6:04 PM Simon Albrecht <address@hidden> wrote:

Hello Chad,

I am not aware that we currently have any developer working on or
familiar enough with that area of the source code. Also, the assertion
that implementing this would be simple is audacious to say the least:
Even looking only at the examples given in that paper, it is by no means
a given how much of that more proportional spacing is desirable (which
the author even acknowledges himself). And in real life, there are very
many other factors influencing spacing.

Best, Simon

On 25.08.19 22:46, Chad Linsley wrote:
> Dear all,
>
> Would anyone be interested in implementing this (simple?) improvement
> to Lilypond’s horizontal spacing algorithm? The math is all here:
>
> https://quod.lib.umich.edu/cgi/p/pod/dod-idx/improved-algorithm-for-spacing-a-line-of-music.pdf?c=icmc;idno=bbp2372.2002.097;format=pdf
>
> I wish I had the programming chops!
>
> C
>
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