Using legacy math fonts

Using legacy math fonts

[Henri]

Dear list,

Because I don't like that Euler calligraphic script provided by Latin Modern Math, I want to revert
to Computer Modern for the uppercase calligraphic letters.  I got so far, that the command will
produce the correct glyphs, however, the kerning is borken.  What did I miss?

Cheers, Henri

---

% Allocate tokens for legacy math codes
\newtoks\legacymathcodes\legacymathcodes={
\Umathcode`A="7"1"41 \Umathcode`B="7"1"42 \Umathcode`C="7"1"43
\Umathcode`D="7"1"44 \Umathcode`E="7"1"45 \Umathcode`F="7"1"46
\Umathcode`G="7"1"47 \Umathcode`H="7"1"48 \Umathcode`I="7"1"49
\Umathcode`J="7"1"4A \Umathcode`K="7"1"4B \Umathcode`L="7"1"4C
\Umathcode`M="7"1"4D \Umathcode`N="7"1"4E \Umathcode`O="7"1"4F
\Umathcode`P="7"1"50 \Umathcode`Q="7"1"51 \Umathcode`R="7"1"52
\Umathcode`S="7"1"53 \Umathcode`T="7"1"54 \Umathcode`U="7"1"55
\Umathcode`V="7"1"56 \Umathcode`W="7"1"57 \Umathcode`X="7"1"58
\Umathcode`Y="7"1"59 \Umathcode`Z="7"1"5A
}

% Load CM calligraphic
\font\tensy  =cmsy10 at \mathstyleface\textstyle
\font\sevensy=cmsy7  at \mathstyleface\scriptstyle
\font\fivesy =cmsy5  at \mathstyleface\scriptscriptstyle

% Allocate family
\newfam\cmcalfam

% Assign font families
\textfont        \cmcalfam=\tensy
\scriptfont      \cmcalfam=\sevensy
\scriptscriptfont\cmcalfam=\fivesy

% Make a macro wrapper
\unexpanded\def\cmcal#1{{\fam\cmcalfam\the\legacymathcodes#1}}

\starttext

$\mathcal{TUV}$

$\cmcal{TUV}$

\stoptext

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Re: Using legacy math fonts

[Henri]

Furthermore the example only works in TeXlive 2017 but not in beta.  What has changed and how do I
make it work again?

On Wed, 2017-08-09 at 17:00 +1200, Henri wrote:
> Dear list,
> 
> Because I don't like that Euler calligraphic script provided by Latin Modern Math, I want to
> revert
> to Computer Modern for the uppercase calligraphic letters.  I got so far, that the command will
> produce the correct glyphs, however, the kerning is borken.  What did I miss?
> 
> Cheers, Henri
> 
> ---
> 
> % Allocate tokens for legacy math codes
> \newtoks\legacymathcodes\legacymathcodes={
> \Umathcode`A="7"1"41 \Umathcode`B="7"1"42 \Umathcode`C="7"1"43
> \Umathcode`D="7"1"44 \Umathcode`E="7"1"45 \Umathcode`F="7"1"46
> \Umathcode`G="7"1"47 \Umathcode`H="7"1"48 \Umathcode`I="7"1"49
> \Umathcode`J="7"1"4A \Umathcode`K="7"1"4B \Umathcode`L="7"1"4C
> \Umathcode`M="7"1"4D \Umathcode`N="7"1"4E \Umathcode`O="7"1"4F
> \Umathcode`P="7"1"50 \Umathcode`Q="7"1"51 \Umathcode`R="7"1"52
> \Umathcode`S="7"1"53 \Umathcode`T="7"1"54 \Umathcode`U="7"1"55
> \Umathcode`V="7"1"56 \Umathcode`W="7"1"57 \Umathcode`X="7"1"58
> \Umathcode`Y="7"1"59 \Umathcode`Z="7"1"5A
> }
> 
> % Load CM calligraphic
> \font\tensy  =cmsy10 at \mathstyleface\textstyle
> \font\sevensy=cmsy7  at \mathstyleface\scriptstyle
> \font\fivesy =cmsy5  at \mathstyleface\scriptscriptstyle
> 
> % Allocate family
> \newfam\cmcalfam
> 
> % Assign font families
> \textfont        \cmcalfam=\tensy
> \scriptfont      \cmcalfam=\sevensy
> \scriptscriptfont\cmcalfam=\fivesy
> 
> % Make a macro wrapper
> \unexpanded\def\cmcal#1{{\fam\cmcalfam\the\legacymathcodes#1}}
> 
> \starttext
> 
> $\mathcal{TUV}$
> 
> $\cmcal{TUV}$
> 
> \stoptext
> 
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
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___________________________________________________________________________________

Re: Using legacy math fonts

[Aditya Mahajan]

> Because I don't like that Euler calligraphic script provided by Latin Modern Math, I want to revert
> to Computer Modern for the uppercase calligraphic letters.

I don't have access to a context installation right now so cannot give a 
more detailed answer.

But typically math fonts provide two stylistic sets of caligraphic 
letters: one similar to the default \mathcal alphabel and the other 
similar to \mathscr alphabet (RSFS fonts etc.) The latter is the default, 
but typically moving to the traditional mathcal styled calligraphic 
letters should be as simple as setting an appropriate font feature.

Aditya
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