[XeTeX] fontspec, fractions, and parens

Will Robertson wspr81 at gmail.com
Sun Nov 18 23:55:48 CET 2007

On Nov 19, 2007 9:02 AM, Ross Moore <ross at ics.mq.edu.au> wrote:
> Maybe you are already using something like this, in which
> case there could be alternative outputs from a particular font.
>   fontspec.sty  offers access to these options:
> 861:\zf at define@font at feature{Fractions}
> 862:\zf at define@feature at option{Fractions}{On}{11}{1}{+frac}
> 863:\zf at define@feature at option{Fractions}{Off}{11}{0}{-frac}
> 864:\zf at define@feature at option{Fractions}{Diagonal}{11}{2}{}
> 865:\zf at define@feature at option{Fractions}{Alternate}{}{}{+afrc}
> provided they are supported in the font, of course.

Yep. There's also the Numerator and Denominator VerticalPosition
features. Then you'd glue them together with a fraction slash glyph.
See xltxtra's \vfrac for a macro that will create arbitrary "vulgar"
fractions if the font supports it...


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