Am 21.04.2014 um 15:46 schrieb Jeong Dal <hak...@me.com>:
> Dear all,
>
> For \startuseMPgraphic, there is a way to do that (found in metafun book) as
> following:
>
> \startuseMPgraphic{Labels}{s, t}
> numeric u; u:= 1cm;
>
> for i=0 upto 7:
> label (textext("$v_{" & decimal (i) & "}$" ), \MPvar{s}[origin,3u*dir(30*i)])
> ;
> label (textext("$v_{" & decimal (i) & "}$" ), \MPvar{t}[origin,3u*dir(30*i)])
> ;
> endfor;
> \stopuseMPgraphic
>
> \starttext
> \placefigure[][]{}
> {\useMPgraphic{ColoringFace::Labeling}{s=0.8, t=1.3}}
> \stoptext
>
> Is there a way to the same job for \processMPbuffer instead of .5 and .7 in
> buffer?
>
> \startbuffer[Labels]%{s, t}
> numeric u; u:= 1cm;
> for i=0 upto 7:
> label (textext("$v_{" & decimal (i) & "}$" ), .5[origin,3u*dir(30*i)]) ;
> label (textext("$v_{" & decimal (i) & "}$" ), .7[origin,3u*dir(30*i)]) ;
> endfor;
> \stopbuffer
>
> \starttext
> \processMPbuffer[Labels]%% ?{s, t}?
> \stoptext
You can’t pass variables with the buffer command but a direct setup and access
of them is possible:
\startbuffer[Labels]
numeric u; u:= 1cm;
for i=0 upto 7:
label (textext("$v_{" & decimal (i) & "}$" ),
\MPrawvar{Labels}{s}[origin,3u*dir(30*i)]) ;
label (textext("$v_{" & decimal (i) & "}$" ),
\MPrawvar{Labels}{t}[origin,3u*dir(30*i)]) ;
endfor;
\stopbuffer
\starttext
\setupMPvariables[Labels][s=0.8, t=1.3]
\processMPbuffer [Labels]
\stoptext
Wolfgang
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