Re: lyluatex: inline vertical alignment of

[Urs Liska]

Hi Malte,

don't know why my previous post got scrambled


Am 10.05.2018 um 14:31 schrieb Malte Meyn:
> Hi list,
>
> the lyluatex manual 
> (https://github.com/jperon/lyluatex/releases/download/v1.0-beta/lyluatex.pdf) 
> says at p. 8 about vertical alignment of inline snippets:
>
> “Note: The alignment works with the edges of the image file, there is 
> no notion of an ‘optical’ center or aligning with the staff lines.”
>
> Would it be possible to get such an alignment and how hard would that 
> be to achieve?

We didn't see a solution for the issue, but just now you may have given 
me an idea.

The problem is that in a cropped image we don't have a clue as to where 
the staff symbol is located vertically.
However, we *can* determine these values in LilyPond, if we find out the 
highest and lowest Y-extent values throughout the first system (we 
expect single-system scores only for inline inclusion).
A Scheme function could do that calculation and write it to an auxiliary 
file. From there we can go on towards a solution in lyluatex.

If you could investigate this I'd be happy to work on that.
Urs

> The reason why I’m asking: I made a markup command that takes a string 
> like "/DD-7-9>_5>" and makes a nice functional analysis symbol from 
> that. I would like to use these symbols also in the text in my LaTeX 
> document without having to code an extra solution for LaTeX. But the 
> baseline of the text in LaTeX and the baseline of the LilyPond markup 
> don’t match. Using a simple offset wouldn’t be enough because the 
> symbols don’t always extend down the same amount.
>
> Any ideas, hints or solutions? I would be willing to contribute to a 
> possible lyluatex feature.
>
> Cheers,
> Malte
>
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