Re: command for a MP graphic

[Wolfgang Schuster <schuster.wolfgang@gmail.com>]

Am 07.05.2013 um 22:28 schrieb Roland Thiers <roland.thiers@gmail.com>:

> Thank you very much for this precision, Wolfgang. I tried with two variables and it works with this
> syntax :
> 
> \startuniqueMPgraphic{polygoneregulier}
> numeric u ; u:=\MPvar{unite}*cm ;
> numeric n ; n:=\MPvar{sides};
> rest of the code
> \stopuniqueMPgraphic
> 
> \define[2]\polyreg
>  {\setupMPvariables[polygoneregulier][unite,sides]
> \uniqueMPgraphic{polygoneregulier}{sides=#1,unite=#2}}

You can define the command as

\define[2]\polyreg
  {\setupMPvariables[polygoneregular][sides=#1,unite=#2]%
   \uniqueMPgraphic{polygoneregular}}

where the variables are set with the \settupMPvariables command or as

\define[2]\polyreg
  {\uniqueMPgraphic{polygoneregular}{sides=#1,unite=#2}}

where the variables are set in the optional argument for \uniqueMPgraphic.

> \starttext
> %\uniqueMPgraphic{polygoneregulier}{unite=2,sides=4}
> \polyreg{6}{0.5}
> \stoptext
> 
> I did not find any détails on \MPvar et \setupMPvariables on the wiki, however

Both commands are mentioned in the metafun [1] manual.

[1] http://www.pragma-ade.nl/show-man-7.htm

Wolfgang
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