Re: Math typesetting problems

[Hans Hagen <pragma@wxs.nl>]

On 1/29/2013 12:20 AM, Khaled Hosny wrote:
> On Mon, Jan 28, 2013 at 09:33:52PM +0100, Wolfgang Schuster wrote:
>>
>> The \frac command uses \vcenter for the content while \dfrac and
>> \tfrac only set the mathstyle before placing the content with the
>> \over primitive.
>
> The use of \vcenter seems odd here as it means the fraction rule will no
> longer guranteed to be centered around the math axis:
> \starttext
> \math{-\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}}
> \stoptext
>
> Also, why \frac is forcing text style fractions even in display mode?
> \starttext
> \startformula
> -\frac{a^{2^{2^2}}}{a} {a^{2^{2^2}}\over a}
> \stopformula
> \stoptext
>
> Both behaviours are different from MkII.

I redid the mkiv code ... configurable, defineable, inheritable ... the 
whole lot

\starttext

\definemathfraction[myfrac] [mathstyle=script]
\definemathfraction[myfracx][mathstyle=script,alternative=outer]

\startformula
{a^{2^{2^2}}\over a}
\frac{a^{2^{2^2}}}{a}
\frac{a^{2}}{b}
\myfrac{a^{2}}{b}
\myfracx{a^{2}}{b}
\stopformula

\stoptext


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