Sanjoy Mahajan wrote:
> This test file (beta 2006.09.28):
>
> ============ 1.tex ============================
> \starttext
> \startMPenvironment
> \def\2#1#2{\vbox{\halign{\hfil##\hfil\cr #1\cr #2\cr}}}
> \stopMPenvironment
>
> \startreusableMPgraphic{fig}
> label(btex sun etex, origin);
> \stopreusableMPgraphic
>
> \reuseMPgraphic{fig}
>
> \stoptext
> ========================================
>
> fails with the error:
>
> ! Parameters must be numbered consecutively.
> <to be read again>
> ##
> l.44 \global \loadfontfileoncetrue \def \2##
> 1##2{\vbox {\halign {\hfil
> ####\...
>
>
> 1-mpgraph.mp gets this figure definition:
>
> beginfig(1);
> verbatimtex \global \loadfontfileoncetrue \def \2##1##2{\vbox {\halign {\hfil
> ####\hfil \cr ##1\cr ##2\cr }}} etex;
> label(btex sun etex
> , origin);
> ;
> endfig;
>
environments are saved in macros, therefore you end up in an argument
mess
\starttext
\startbuffer[mp]
\def\2#1#2{\vbox{\halign{\hfil##\hfil\cr #1\cr #2\cr}}}
\stopbuffer
\def\useMPenvironmentbuffer[#1]%
{\expanded{\startMPenvironment\noexpand\readfile{\TEXbufferfile{\jobname}}{}{}}\stopMPenvironment}
\useMPenvironmentbuffer[mp]
\startreusableMPgraphic{fig}
label(btex sun etex, origin);
\stopreusableMPgraphic
\reuseMPgraphic{fig}
\stoptext
works ok ; maybe i should add that command to the core but anyhow you
can wikify it
> So the parameters in the definition are being doubled up by one of the
> transformations that inserts the verbatimtex..etex block. By the way,
> should the verbatimtex..etex block go outside the beginfig..endfig, as
> it would in a standalone MP file? If only for efficiency rather than MP
> reparsing it with each beginfig.
>
>
depends, if you process them runtime, it does not matter, if you process
graphics between runs, they may be some cary over effects, although the
btex/etex snippets are grouped
Hans
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