MPgraphic

MPgraphic

[Haseloff, Lutz]

I like it VERY much, to have METAPOST-code
and the TeX-code in the one and only sourcefile.
But an error occurs, when i want to process labels.

My sourcefile:

\setupoutput [pdftex]
\useencoding [win]
\mainlanguage [de]
\starttext
\startuseMPgraphic{test}
label(btex \font\land=psxu7t at 20pt
\land LAND etex,(0,9pt));
label(btex \font\land=psxu7t at 20pt
\land BRANDENBURG etex,(0,-9pt));
\stopuseMPgraphic
\useMPgraphic{test}
\stoptext

Context breaks with errormessage:
!missing `,` has been inserted!

A look into the mpgraph.mp shows following:

mpgraph:=1;
beginfig(1);
label(btex \font \land =psxu7t at 20pt
\land LAND etex;
,(0,9pt));
label(btex \font \land =psxu7t at 20pt
\land BRANDENBURG etex;
,(0,-9pt));
endfig;
end.

If i put the METAPOST-code into a seperate file and
metapost it, all works fine,
mp mpgraph don´t work.
Does ConTeXt insert an extra ´;´ to the METAPOST-code?

Lutz

Re: MPgraphic

[Hans Hagen]

"Haseloff, Lutz" wrote:
> 
> I like it VERY much, to have METAPOST-code
> and the TeX-code in the one and only sourcefile.
> But an error occurs, when i want to process labels.

> Does ConTeXt insert an extra ´;´ to the METAPOST-code?

indeed:

\long\def\dodowriteMPgraphicline#1btex#2#3etex#4\MPend%
  {\ifx\next\empty\else\ifx\next\relax\else
     \bgroup
     \let\par=\empty
     \ifx#2\relax
       \immediate\write\MPwrite{#1;}%
       \egroup
     \else
       \convertargument#2#3\to\ascii
       \immediate\write\MPwrite{#1btex \ascii etex;}%
       \egroup
       \dowriteMPgraphicline#4btex\relax etex\MPend
     \fi
   \fi\fi}

you may remove the                              ^^; before etex and see
what happens. As you may notice, the text between btex etex is passed
unexpanded. (a pretty hard coded fontname in you file btw; if you know
what tex you run, you can say \rm or so). 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.nl
-----------------------------------------------------------------

MPgraphic

[R. Bastian]

Salut tout le monde,

I wrote
------------------------
[...]
texte texte

\startMPgraphic
draw (0.0cm, 0.0cm) -- (1.1cm, 1.1cm) ;
\stopMPgraphic

[...]
-------------------------

The compilation works ; I get an EPS-file with suffixe mpgraph.2 (visible with gv)
but there is nothing in the PDF.

I use the minimals from 23.04.09.

What is wrong ?

best regards,

René B.




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