embed metapost figure into document

embed metapost figure into document

[Sylvain Hubert]

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Dear List,

I'm trying to embed a metapost image into the document. According the MetaFun
manual <http://www.pragma-ade.com/general/manuals/metafun-p.pdf>,
"embedding such a graphic is done by:
\externalfigure[graphic.123][width=4cm]", but the following example
produces an empty page:

    % test.mkxl
    \starttext
    \externalfigure[test.123][width=4cm]
    \stoptext

    % test.123
    draw fullcircle scaled cm withcolor black;

Does anyone know how to properly embed a metapost image into a context
document?

Thanks!

Best,
Sylvain

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___________________________________________________________________________________

Re: embed metapost figure into document

[Jairo A. del Rio]

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Hi, Sylvain.

LuaMetaTeX and LuaTeX, the engines used by ConTeXt nowadays, use an
embedded library, so external compilations/files are not necessary. Just
out of curiosity, wouldn't it be easier to use a ConTeXt environment? E.g.:

\starttext
\startMPcode %\startuseMPgraphic{<name>} if you want to reuse your graphic
with \useMPgraphic{<name>}
    draw fullcircle scaled cm
    %withcolor black % black is default
    ;
\stopMPcode %\stopuseMPgraphic
\stoptext

More info here: https://wiki.contextgarden.net/MetaFun_-_MetaPost_in_ConTeXt
To actually answer your question, if you actually want to load a Metapost
graphic externally generated, you should have something like:

%nice.mp
%"begin ... endfig", as well as "end" are important
beginfig (1);
draw fullcircle scaled cm
%withcolor black
;
endfig;
end

so when you compile it via

mpost nice.mp

(obviously supposing you have Metapost installed) you'll get a file called
nice.1 and

\starttext

\externalfigure[nice.1][width=4cm]

\stoptext

will work. However, as you can see, ConTeXt deals with such minutiae for
you and extends Metapost capabilities too, so the second alternative is not
the ConTeXt way to go.

I hope it helps.

Jairo :)

El lun., 9 de nov. de 2020 a la(s) 16:59, Sylvain Hubert (
champignoom@gmail.com) escribió:

> Dear List,
>
> I'm trying to embed a metapost image into the document. According the MetaFun
> manual <http://www.pragma-ade.com/general/manuals/metafun-p.pdf>,
> "embedding such a graphic is done by:
> \externalfigure[graphic.123][width=4cm]", but the following example
> produces an empty page:
>
>     % test.mkxl
>     \starttext
>     \externalfigure[test.123][width=4cm]
>     \stoptext
>
>     % test.123
>     draw fullcircle scaled cm withcolor black;
>
> Does anyone know how to properly embed a metapost image into a context
> document?
>
> Thanks!
>
> Best,
> Sylvain
>
> ___________________________________________________________________________________
> 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://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>

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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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: embed metapost figure into document

[Sylvain Hubert]

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On Mon, 9 Nov 2020 at 23:40, Jairo A. del Rio <jairoadelrio6@gmail.com>
wrote:

> Hi, Sylvain.
>
> LuaMetaTeX and LuaTeX, the engines used by ConTeXt nowadays, use an
> embedded library, so external compilations/files are not necessary. Just
> out of curiosity, wouldn't it be easier to use a ConTeXt environment? E.g.:
>
> \starttext
> \startMPcode %\startuseMPgraphic{<name>} if you want to reuse your graphic
> with \useMPgraphic{<name>}
>     draw fullcircle scaled cm
>     %withcolor black % black is default
>     ;
> \stopMPcode %\stopuseMPgraphic
> \stoptext
>
> More info here:
> https://wiki.contextgarden.net/MetaFun_-_MetaPost_in_ConTeXt
> To actually answer your question, if you actually want to load a Metapost
> graphic externally generated, you should have something like:
>
> %nice.mp
> %"begin ... endfig", as well as "end" are important
> beginfig (1);
> draw fullcircle scaled cm
> %withcolor black
> ;
> endfig;
> end
>
> so when you compile it via
>
> mpost nice.mp
>
> (obviously supposing you have Metapost installed) you'll get a file called
> nice.1 and
>
> \starttext
>
> \externalfigure[nice.1][width=4cm]
>
> \stoptext
>
> will work. However, as you can see, ConTeXt deals with such minutiae for
> you and extends Metapost capabilities too, so the second alternative is not
> the ConTeXt way to go.
>
> I hope it helps.
>
> Jairo :)
>

Hi Jairo,

Thank you very much for the suggestion and the thorough explanation.

I extracted the metapost code to a new file because I felt it would be a
bit lengthy and noisy to stay with the text content.

But you're right, an extra compilation step is not any better. I should
probably use \component figure.tex, in place of \externalfigure[figure.1]

Sylvain

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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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________