Re: substituting characters in math font

[Alan Bowen <bowenalan03@gmail.com>]

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Many thanks for this, Wolfgang. That is very helpful. Right now, then, I
have:

\definefontfamily[mainface][rm][Brill]
[protrusion=quality,
expansion=quality,
mode=node,
force=yes,
]
\definefallbackfamily [mainface] [rm] [Brill]
[tf=style:italic, range={0x03B8}, offset={0x03D1}]%Greek theta

\definefallbackfamily[mainface][mm][Brill]
[range={0x30-0x39}] %oldstyle numerals, normal

\definefallbackfamily [mainface] [mm] [Brill] [preset=math:lowercasenormal]
\definefallbackfamily [mainface] [mm] [BrillItalic]
[preset=math:lowercaseitalic]
\definefallbackfamily [mainface] [mm] [Brill] [preset=math:uppercasenormal]
\definefallbackfamily [mainface] [mm] [BrillItalic]
[preset=math:uppercaseitalic]

\definefallbackfamily [mainface] [mm] [Brill]
[preset=math:lowercasegreeknormal]
\definefallbackfamily [mainface] [mm] [BrillItalic]
[preset=math:lowercasegreekitalic]
\definefallbackfamily [mainface] [mm]
[Brill][preset=math:uppercasegreeknormal]
\definefallbackfamily [mainface] [mm] [BrillItalic]
[preset=math:uppercasegreekitalic]

\definefontfamily[mainface][mm][TeX Gyre Termes Math][scale=0.94]

\setupmathematics[ucgreek=normal, lcgreek=italic]

\setupbodyfont[mainface,10pt]


\starttext

normal: 1234567890\quad math: \m{1234567890}

normal: ABCDEFabcdef\quad italic: \emph{ABCDEFabcdef}\quad math: \m{\red
ABCDEFabcdef}

normal: ΑΒΓΔΕΘαβγδεθ\quad slanted: \emph{ΑΒΓΔΕΘαβγδεθ}\quad math: \m{\red
ΑΒΓΔΕΘαβγδεθ}

Greek theta: \emph{θ}

\stoptext

As you can see, all I need is to get the Brill lowercase Greek in mathmode
and the proper slanted Greek theta. I have tried this with Pagella and
Cambria instead of the Brill font and the problem persists. So I must be
doing something wrong. But what?

Alan

On Wed, Oct 18, 2017 at 2:27 PM, Wolfgang Schuster <
schuster.wolfgang@gmail.com> wrote:

>
>
> Alan Bowen <bowenalan03@gmail.com>
> 2. Oktober 2017 um 14:04
> I need to substitute the regular and italic characters of a publisher’s
> non-math font (Unicode) for those in a math font.
>
> The non-math addresses are:
> 0041-005A, 0061-007A %italic uppercase and lowercase
> 0391-03A9, 03B1-03C9  %slanted Greek uppercase and lowercase
>
> The math addresses are:
> 1D434-1D44D, 1D44E-1D467 %italic uppercase and lowercase
> 1D6E2-1D6FA, 1D6FC-1D714  %slanted Greek uppercase and lowercase
>
> Is there a way to use the \definefallbackfamily mechanism that does not
> assume that the characters have the same Unicode addresses? Or is some
> other approach required?
>
> The fallback mechanism provides a offset key which lets you replace a math
> character with a normal text character.
>
> \definefontfamily     [mainface] [ss] [TeX Gyre Heros]
>
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:lowercasenormal]
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:lowercaseitalic]
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [tf=style:italic,range=0x68,offset=0x210E]% lowercase italic h
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:lowercasebold]
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:uppercasenormal]
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:uppercaseitalic]
> \definefallbackfamily [mainface] [mm] [TeX Gyre Heros]
> [preset=math:uppercasebold]
>
> \definefontfamily     [mainface] [mm] [TeX Gyre Pagella Math]
>
> \starttext
>
> \setupbodyfont[pagella]
>
> Lowercase: $ {\tf abc} {\it abc} {\bf abc} $
>
> Uppercase: $ {\tf ABC} {\it ABC} {\bf ABC} $
>
> \setupbodyfont[mainface]
>
> Lowercase: $ {\tf abc} {\it abch} {\bf abc} $
>
> Uppercase: $ {\tf ABC} {\it ABC} {\bf ABC} $
>
> \stoptext
>
> Wolfgang
>
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If your question is of interest to others as well, please add an entry to the Wiki!

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