Processing MP graphics without interference

Processing MP graphics without interference

[Marco Patzer]

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Hi,

I have MetaPost graphics that are generated by an external program.
Each graphic is an individual file and the code is enclosed by

  beginfig(1)
    …
  endfig;
  end

The beginfig argument is always “1”, it does not increment.
Including the graphics using MPrun fails, since the first figure's
“end” stops the MetaPost run:

\startMPrun{foo}
  beginfig(1);
    fill fullcircle scaled 1cm withcolor blue;
  endfig;
  end; %% prevents the second graph from being processed
\stopMPrun

\startMPrun{bar}
  beginfig(1);
    fill unitsquare scaled 2cm withcolor red;
  endfig;
  end;
\stopMPrun

\starttext
  foo: \externalfigure[mprun:foo.1]
  bar: \externalfigure[mprun:bar.1] %% not shown
\stoptext

I want to avoid preprocessing the generated MP graphics, if possible
(stripping the “end”s). What is the best way to deal with these
graphics?


Marco

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Re: Processing MP graphics without interference

[Aditya Mahajan]

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On Fri, 1 Feb 2013, Marco Patzer wrote:

> Hi,
>
> I have MetaPost graphics that are generated by an external program.
> Each graphic is an individual file and the code is enclosed by
>
>  beginfig(1)
>    …
>  endfig;
>  end
>
> The beginfig argument is always “1”, it does not increment.
> Including the graphics using MPrun fails, since the first figure's
> “end” stops the MetaPost run:
>
> \startMPrun{foo}
>  beginfig(1);
>    fill fullcircle scaled 1cm withcolor blue;
>  endfig;
>  end; %% prevents the second graph from being processed
> \stopMPrun
>
> \startMPrun{bar}
>  beginfig(1);
>    fill unitsquare scaled 2cm withcolor red;
>  endfig;
>  end;
> \stopMPrun
>
> \starttext
>  foo: \externalfigure[mprun:foo.1]
>  bar: \externalfigure[mprun:bar.1] %% not shown
> \stoptext
>
> I want to avoid preprocessing the generated MP graphics, if possible
> (stripping the “end”s). What is the best way to deal with these
> graphics?

(Untested), something like:

let normalend=end;
let end=relax; % Don't know the MP equiv.
...
...

let end=normalend;

Aditya

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Re: Processing MP graphics without interference

[Marco Patzer]

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On 2013–02–01 Aditya Mahajan wrote:

> (Untested), something like:
> 
> let normalend=end;
> let end=relax; % Don't know the MP equiv.

That works for the example and is quite elegant, but it fails on
real data. I need to investigate why.

Thanks for the quick answer.

Marco

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___________________________________________________________________________________