Inline Fractions

Inline Fractions

[Johann Birnick]

Recently inline fractions stopped working correctly.

For example symbol spacing, sub-/superscripts, the line is too short,...

You can see the 3 named problems and how they sometimes appear and sometimes not
in this two fractions:

\starttext
$\frac{\sin(x)}{16 \pi \epsilon_0 c^2 m_e^2} \frac{\sin(x)}{\epsilon_0}$
\stoptext

Compare the output between the current LMTX version with some old version. (I
compared with mk4, because I had nothing else available. I don't know when bugs
were introduced.)

Best regards,
Johann

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Re: Inline Fractions

[Hans Hagen]

On 1/25/2021 1:58 PM, Johann Birnick wrote:
> Recently inline fractions stopped working correctly.
> 
> For example symbol spacing, sub-/superscripts, the line is too short,...
> 
> You can see the 3 named problems and how they sometimes appear and sometimes not
> in this two fractions:
> 
> \starttext
> $\frac{\sin(x)}{16 \pi \epsilon_0 c^2 m_e^2} \frac{\sin(x)}{\epsilon_0}$
> \stoptext
> 
> Compare the output between the current LMTX version with some old version. (I
> compared with mk4, because I had nothing else available. I don't know when bugs
> were introduced.)
I'll check it. We're in a transition to a dual font model in math and 
it's kind of tricky to let both do the same but we'll get there 
eventually. It also has some consequences for backand code which makes 
it even more tricky. But normally, once it does work it keeps working.

Hans


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inline fractions

[Alan Bowen]

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The following mwe

\definefontfeature[fraction][frac=yes]
\definehighlight[textfraction][style={\feature[+][fraction]}]

\starttext
a fraction \m{\frac{1}{n}}, \textfraction{1/n}, \vulgarfraction{1}{n} in
the text
\stoptext

works for all but \textfraction in the latest beta (luatex, luametatex).
Has something changed or have I missed something?

Alan

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