I think this is one way: \startuseMPgraphic{ARule} draw origin -- (\MPvar{mylength},0) ; \stopuseMPgraphic \def\ARule#1{% \setupMPvariables[ARule][mylength=#1] \useMPgraphic{ARule} } \starttext Foo \ARule{5mm} bar \ARule{10mm} \stoptext Best regards, Mikael On Thu, Apr 9, 2009 at 8:07 AM, Wei-Wei Guo wrote:

Dear all,

I need to use many rules with different lengths. Is there any way to implement function like below:

 \startuniqueMPgraphic{ARule}{length}  draw origin -- (\MPvar{length},0) ;  \stopuniqueMPgraphic

 \uniqueMPgraphic[length=5mm]{ARule}

The example cannot be run. I only use it to explain what I want.

Any suggestion is appreciated.

Best wishes, Wei-Wei ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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