Greek letters in math with XeTeX

Greek letters in math with XeTeX

[Flavien Lambert]

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(Sorry for the preceding message, I forgot the [NTG-context] for filters...)

Dear all, I try to use Open Type fonts with ConTeXt and XeTeX (I recently
did the same with LaTeX using fontspec and mathspec packages). From the web
site, I managed to use them for standard text as well as roman alphabet in
math. Unfortunately, greek letters stay printed with the Latin Modern font.
>From examples of the web site, I tried the following lines but without
success. In a preceding post, there was a similar question but with the
luatex engine.
Thanks for your help !

\definetypeface[myface][rm][Xserif][GFS Didot]
\definetypeface[myface][mm][math][GFS Didot]

\starttext

Normal text.

\startformula
\alpha + \beta = 10
\stopformula

\stoptext

-- 
Flavien.
----------------------------
"Quantum objects are completely crazy but, at least, they are all crazy in
the same way." R.P. Feynman.

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___________________________________________________________________________________

Re: Greek letters in math with XeTeX

[Mojca Miklavec]

On Sun, Sep 7, 2008 at 10:04 PM, Flavien Lambert <petit.lepton@gmail.com> wrote:
> (Sorry for the preceding message, I forgot the [NTG-context] for filters...)
>
> Dear all, I try to use Open Type fonts with ConTeXt and XeTeX (I recently
> did the same with LaTeX using fontspec and mathspec packages). >From the web
> site, I managed to use them for standard text as well as roman alphabet in
> math. Unfortunately, greek letters stay printed with the Latin Modern font.
> From examples of the web site, I tried the following lines but without
> success. In a preceding post, there was a similar question but with the
> luatex engine.
> Thanks for your help !
>
> \definetypeface[myface][rm][Xserif][GFS Didot]
> \definetypeface[myface][mm][math][GFS Didot]

No time for complete answer, but you need to define the whole
[math][GFS Didot] repertoaire first. This has no effect until you
define one.

Someone needs to write "Unicode math support" for mkii, or you need to
make your own virtual font.

See this file for example:
    http://source.contextgarden.net/math-lbr.tex
in a similar way that would need to be done for general typefaces without math.

You might then be able to say something like
    \definetypeface[myface][mm][Xmath][GFS Didot], though I'm 100%
sure that people would then start complaining very soon that they
either:
- want other math characters in their favorite font as well (like
plus, minus, brackets, ...), not only Greek letters
- complain that they don't get any symbol (no font has them all)

Mojca
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webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
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___________________________________________________________________________________

Re: Greek letters in math with XeTeX

[Aditya Mahajan]

On Mon, 8 Sep 2008, Mojca Miklavec wrote:

> Someone needs to write "Unicode math support" for mkii, or you need to
> make your own virtual font.

Well...someone also needs to write "Unicode math support" for mkiv and I 
would work on that in the hope that there is some chance that I may 
actually understand how mkiv (will) handle math fonts. With MKII, math 
fonts is black magic for me.

Aditya
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___________________________________________________________________________________

Re: Greek letters in math with XeTeX

[Hans Hagen]

Aditya Mahajan wrote:
> On Mon, 8 Sep 2008, Mojca Miklavec wrote:
> 
>> Someone needs to write "Unicode math support" for mkii, or you need to
>> make your own virtual font.
> 
> Well...someone also needs to write "Unicode math support" for mkiv and I 
> would work on that in the hope that there is some chance that I may 
> actually understand how mkiv (will) handle math fonts. With MKII, math 
> fonts is black magic for me.

in mkii math characters (symbols) are taken from many fonts (and we can 
even have several combinations of math fonts active at the same time)

in mkiv we will use unicode exclusively (as soon as the math subproject 
of luatex is finished)

i don't think that mkii will have unicode math support

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
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___________________________________________________________________________________

Re: Greek letters in math with XeTeX

[Flavien Lambert]

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Just to understand a bit more : signs like equal are printed inside math
environment with GFS Didot thanks to \definetypeface[myface][rm][Xserif][GFS
Didot]. Since GFS Didot ,as a greek font has greek letters, why are these
glyphs not used ? I suppose that when greek people are using directly alpha
as a letter (not \alpha), it should take into account the GFS Didot font,
shouldn' it ?


>
> No time for complete answer, but you need to define the whole
> [math][GFS Didot] repertoaire first. This has no effect until you
> define one.
>
> Someone needs to write "Unicode math support" for mkii, or you need to
> make your own virtual font.
>
> See this file for example:
>    http://source.contextgarden.net/math-lbr.tex
> in a similar way that would need to be done for general typefaces without
> math.
>
> You might then be able to say something like
>    \definetypeface[myface][mm][Xmath][GFS Didot], though I'm 100%
> sure that people would then start complaining very soon that they
> either:
> - want other math characters in their favorite font as well (like
> plus, minus, brackets, ...), not only Greek letters
> - complain that they don't get any symbol (no font has them all)
>
> Mojca
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>



-- 
Flavien.
----------------------------
"Quantum objects are completely crazy but, at least, they are all crazy in
the same way." R.P. Feynman.

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: Greek letters in math with XeTeX

[Hans Hagen]

Flavien Lambert wrote:
> Just to understand a bit more : signs like equal are printed inside math
> environment with GFS Didot thanks to \definetypeface[myface][rm][Xserif][GFS
> Didot]. Since GFS Didot ,as a greek font has greek letters, why are these
> glyphs not used ? I suppose that when greek people are using directly alpha
> as a letter (not \alpha), it should take into account the GFS Didot font,
> shouldn' it ?

it's more complex than that ... tex organizes math characters in 
families and = and alpha are in different slots there

greek alpha letter is (in mkiv) directly accessing the right glyph in 
the font; in mkiv mode it cna be either direct access, or fallback on 
math or ...

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Greek letters in math with XeTeX

[Flavien Lambert]

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Dear all, I try to use Open Type fonts with ConTeXt and XeTeX (I recently
did the same with LaTeX using fontspec and mathspec packages). From the web
site, I managed to use them for standard text as well as roman alphabet in
math. Unfortunately, greek letters stay printed with the Latin Modern font.
>From examples of the web site, I tried the following lines but without
success. In a preceding post, there was a similar question but with the
luatex engine.
Thanks for your help !

\definetypeface[myface][rm][Xserif][GFS Didot]
\definetypeface[myface][mm][math][GFS Didot]

\starttext

Normal text.

\startformula
\alpha + \beta = 10
\stopformula

\stoptext

-- 
Flavien.
----------------------------
"Quantum objects are completely crazy but, at least, they are all crazy in
the same way." R.P. Feynman.

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________