# Re: [NTG-context] doublestroke

Still trying to have different blackboard symbols than those default with
that I've been trying to adapt to math (
http://tex.stackexchange.com/questions/124824/context-unicode-fallback-font),
one involving \definefontfallback, the other one using \setmainfontfallback
with some "range".

It is very interesting because in both cases I completely fail to obtain
the result I want.
In the first case I do have the symbols from termes, but only some "N"
In the second case (simplefonts), all symbols follow the required fallback,
but the math characters.

\definefontfallback
[termes_fallback]
[termes] [0x0000-0xFFFF] %%[force=no]

\Umathaxis\textstyle=.8ex

\starttypescript [myModern]
\definetypeface [myModern] [rm] [serif] [modern]     [default]
\definetypeface [myModern] [ss] [sans]  [modern]  [default]
[rscale=0.887]
\definetypeface [myModern] [tt] [mono]  [modern]    [default]
[rscale=1.163]
\definetypeface [myModern] [mm] [math]  [termes_fallback]     [default]
[rscale=1.050]
\stoptypescript

\usetypescript[myModern]
\setupbodyfont[myModern,12pt]

\starttext

The default one doesn't even seem to have $ℕ \char"2115 \Umathchar "0 "0 "2115\alpha$\char"2115,  α (alpha).

\usemodule[simplefonts]
\setmainfontfallback[termes][range={0x0000-0xFFFF}, force=yes,
rscale=auto]

The default one doesn't even seem to have
$\Umathchar"0"0"2115\utfchar{"2115}$ (white circle) or α (alpha).

\stoptext

Some help with those examples would be very helpful.

Regards,
Chris

On Thu, Dec 19, 2013 at 4:50 PM, Elspeth McGullicuddy <
elspethmcgullicu...@gmail.com> wrote:

> Hi,
> I'm writing math and I'm using "modern", and I would like to use
> "doublestroke".
> There is an example here,
> http://www.ntg.nl/pipermail/ntg-context/2008/037124.html, but I think
> it's not likely to work since families aren't used anymore.
> I really can't think how it should be done, and all I've found would be
> through some substitution mechanism as described in "fonts-mkiv.pdf".
> I could use an example of replacing a "vector" of a font, by another font.
> There might be things too with "simplefonts" and "fallback" mechanism, but
> I haven't seen examples with math.
> Regards,
> Chris
>
>

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