Message-Id: <9311231830.AA23470@sc.ZIB-Berlin.DE>
Reply-To: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
In-Reply-To:  <199311221703.SAA13468@lorraine.loria.fr> from "Frank Mittelbach"
              at Nov 22, 93 04:40:37 pm
Date:         Tue, 23 Nov 93 19:27:56 CET
From: "Denis B. Roegel" <Denis.Roegel@LORIA.FR>
Sender: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
To: Multiple Recipients of <LATEX-L@vm.urz.Uni-Heidelberg.de>
Subject:      Re: NFSS2: how do I change symbol position in the middle
Status: R


Hello,

A few days ago, I posted a query in order to change locally
the font used for math letters. Frank Mittelbach suggested to use a
different \mathversion. I used it and it worked fine.

But, now, I would like to do the following:
I want to switch between two math versions which do not have
all symbols at the same location, that is, with different encodings.
(maybe I should not do something like that, but it's not really
the point here).

Here is an example: I want to put most of the letters and
operators characters in cmtt font. (the reason is that
I need to mix mathematics and a programming language;
by the way, a good answer is maybe to create
a virtual font mainly based on cmtt but with
`.' or `,' like in cmmi ?)

Ok, so in the following example, I had the idea to create
two symbol fonts `oldoperator' and `oldletters'
in order to access them later, namely
when \mymathtt is activated in constructions like:

{\mymathtt $   formulas... $}
I switch to the tt version of the `operators' and `letters'
and I *try* to redefine the character location
of a few symbols. And now I'm stuck because I cannot execute
\DeclareMathSymbol out of the preamble.


\DeclareSymbolFont{oldoperators}{OT1}{cmr}{m}{n}
\DeclareSymbolFont{oldletters}{OML}{cmm}{m}{it}

\DeclareMathVersion{tt}
\SetSymbolFont{operators}{tt}{OT1}{cmtt}{m}{n} % family 0
\SetSymbolFont{letters}{tt}{OT1}{cmtt}{m}{n} % family 1

\def\mymathtt{\mathversion{tt}%
               \DeclareMathSymbol{.}{0}{letters}{"2E}%
               \DeclareMathSymbol{,}{6}{letters}{"2C}%
               \DeclareMathSymbol{=}{3}{oldoperators}{"3D}%
               \DeclareMathSymbol\Delta{7}{oldoperators}{"01}%
               \DeclareMathSymbol{/}{0}{oldletters}{"3D}%
               \DeclareMathSymbol{<}{3}{oldletters}{"3C}%
               \DeclareMathSymbol{>}{3}{oldletters}{"3E}%
}

In OFSS, I did all this with a few \mathcode s, and it worked,
though my \mymathtt declaration was not sizeable
(I did it only for one size as a matter of fact).

So ?

Thanks for your ideas,

Denis.

 -----------------------------------------------------
| Denis Roegel                                        |
| CRIN (Centre de Recherche en Informatique de Nancy) |
| F-54506 VANDOEUVRE-LES-NANCY                        |
| FRANCE                                              |
| e-mail: roegel@loria.fr                             |
 -----------------------------------------------------