passing arguments to \processMPbuffer

passing arguments to \processMPbuffer

[Jeong Dal]

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

Thank you.

Best regards,

Dalyoung
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Re: passing arguments to \processMPbuffer

[Wolfgang Schuster]

Am 21.04.2014 um 15:46 schrieb Jeong Dal <haksan@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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___________________________________________________________________________________

Re: passing arguments to \processMPbuffer

[Jeong Dal]

Dear Wolfgang,

Thank you for your solution.
Sometimes I need to use \processMPbuffer for the animated graphics.
BTW, what is the differences between ‘MPrawvar’ and ‘MPvar’.
MPvar didn’t work in your example.

Best regards,

Dalyoung
___________________________________________________________________________________
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
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___________________________________________________________________________________

Re: passing arguments to \processMPbuffer

[Wolfgang Schuster]

Am 22.04.2014 um 14:42 schrieb Jeong Dal <haksan@me.com>:

> Dear Wolfgang,
> 
> Thank you for your solution.
> Sometimes I need to use \processMPbuffer for the animated graphics.
> BTW, what is the differences between ‘MPrawvar’ and ‘MPvar’.
> MPvar didn’t work in your example.

The \Mprawvar command takes two argument, the first takes the same name
which you have used for the \setupMPvariables command and the second
argument is the names of the key.

Wolfgang
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