Re: Math and bold font

[Florian Wobbe <Florian.Wobbe@awi.de>]

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On Dec 5, 2010, at 14:58 , Procházka Lukáš wrote:

> Hello,
> 
> thanks for the explanation -
> 
> On Sat, 04 Dec 2010 09:55:25 +0100, Hans Hagen <pragma@wxs.nl> wrote:
> 
>> On 3-12-2010 5:00, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
>>> 
>>> to get slanted chars, I have to call \it or \sl or \bi explicitly. OK, I
>> 
>> In fact in math these are not font switches, but switches to a different
>> alphabet.  In traditional tex that normally is a font switch so one gets
>> the other bold or whatever shapes for free, given that they are in that
>> font (so it's a side effect of the way math alphabets are implemented),
>> but not so in open type math.
>> 
>> there is no default math font in mkiv: one uses regular math or bold
>> math (given that there are two font(set)s available which is seldom the
>> case) and within them gets bold or heavy alphabets (plus a few chars)
> 
> - So does it mean that the Vladimir's "cambria case" is exactly the seldom case when regular and bold math are available, both defining Greek chars like \alpha as well?
> 
>>>> \setupbodyfont[cambria]
>>>> 
>>>> \starttext
>>>> This is a test.
>>>> $a=\alpha$
>>>> $\bf a=\alpha$
>>>> $\bi a=\alpha$
>>>> \stoptext
> 
> Please, could you give more examples of normal and bold math fonts "of the same kin" (to be used for normal and bold math), both having Greek letters as well?

Hi,

this does not work with cambria math:

$\bf a=\alpha$
$\bi a=\alpha$

You should get the unicode math set of cambria math this way:

bold math: $\fontchar{u1D41A}=\fontchar{u1D6C2}$
bold italic math: $\fontchar{u1D482}=\fontchar{u1D736}$

I wonder if there are shorthand macros for accessing the unicode math slots for script, bold, sans, etc.

Really strange things happen though (see attachment):

% tested with all three:
%\setupbodyfont[cambria]
%\setupbodyfont[asana]
\setupbodyfont[xits]

\startTEXpage[offset=1ex]

This fails:
$a=\alpha$
$\fontchar{u1D41A}=\fontchar{u1D6C2}$
$\fontchar{u1D482}=\fontchar{u1D736}$

However, this is OK (unicode inserted directly): $𝐚𝒂$

{\tfx
This is small but the math remains unscaled and displays questionmarks:
$a=\alpha$
$\fontchar{u1D41A}=\fontchar{u1D6C2}$
$\fontchar{u1D482}=\fontchar{u1D736}$
}

{\tfa
This is big and math font is also big and displays correctly:
$a=\alpha$
$\fontchar{u1D41A}=\fontchar{u1D6C2}$
$\fontchar{u1D482}=\fontchar{u1D736}$
}

{\tfa\tfx
This is normal (\type{\tfa\tfx}!) but the math remains big and displays ok:
$a=\alpha$
$\fontchar{u1D41A}=\fontchar{u1D6C2}$
$\fontchar{u1D482}=\fontchar{u1D736}$
}

\stopTEXpage


> - Vladimir showed "cambria". Unfortunately, his solution changes the entire document bodyfont (i.e. non-math font as well).

You could of cause create your own font (e.g. pagella with cambria math):

\starttypescript [pagella]
  \definetypeface [\typescriptone] [mm] [math] [cambria] [default]
\stoptypescript

\setupbodyfont[pagella]

Florian


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