[NTG-context] dimension * counter

[NTG-context] dimension * counter

[Henning Hraban Ramm]

Hi again,
I’d like to calculate the thickness of the current document.

This doesn’t work (“Argument of \lastcounter has an extra }”):

\definemeasure[paperthickness][.1mm]
\expanded{\definemeasure[bookthickness][\measured{paperthickness}*\lastcounter[userpage]/2]}


It works with e.g. "50\measured{paperthickness}", but multiplication of 
a dimension/measure with a counter seems to be a problem.

Hraban
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[NTG-context] Re: dimension * counter

[Wolfgang Schuster]

Am 15.09.2025 um 15:09 schrieb Henning Hraban Ramm:
> Hi again,
> I’d like to calculate the thickness of the current document.
> 
> This doesn’t work (“Argument of \lastcounter has an extra }”):
> 
> \definemeasure[paperthickness][.1mm]
> \expanded{\definemeasure[bookthickness][\measured{paperthickness} 
> *\lastcounter[userpage]/2]}
> 
> 
> It works with e.g. "50\measured{paperthickness}", but multiplication of 
> a dimension/measure with a counter seems to be a problem.


You're using the wrong counter command.

\starttext

\definemeasure[paperthickness][.1mm]

\the\dimexpression{\measured{paperthickness}*\lastcountervalue[userpage]/2}

\the\dimexpression{\measured{paperthickness}*\lastuserpage/2}

\stoptext

Wolfgang

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___________________________________________________________________________________

[NTG-context] Re: dimension * counter

[Henning Hraban Ramm]

Am 15.09.25 um 18:47 schrieb Wolfgang Schuster:
> Am 15.09.2025 um 15:09 schrieb Henning Hraban Ramm:
>> Hi again,
>> I’d like to calculate the thickness of the current document.
>>
>> This doesn’t work (“Argument of \lastcounter has an extra }”):
>>
>> \definemeasure[paperthickness][.1mm]
>> \expanded{\definemeasure[bookthickness][\measured{paperthickness} 
>> *\lastcounter[userpage]/2]}
>>
>>
>> It works with e.g. "50\measured{paperthickness}", but multiplication 
>> of a dimension/measure with a counter seems to be a problem.
> 
> 
> You're using the wrong counter command.
> 
> \starttext
> 
> \definemeasure[paperthickness][.1mm]
> 
> \the\dimexpression{\measured{paperthickness}*\lastcountervalue[userpage]/2}
> 
> \the\dimexpression{\measured{paperthickness}*\lastuserpage/2}
> 
> \stoptext

Thank you!

Now I can print on the front edge of a book/magazine. ✌️😁

Hraban



\setuppapersize[A5][A5,oversized]
\setupbodyfont[heros,12pt]

\definelayer[Cut][x=0mm,y=0mm,height=1ph,width=1pw,repeat=yes]

\definemeasure[paperthickness][.1mm]
\expanded{\definemeasure[bulkthickness][\measured{paperthickness}*\lastuserpage/2]}

\def\Edgetext{\scale[height=\measure{bulkthickness}]{\definedfont[SansBold*default]context 
group journal}}
\setwidthof{\Edgetext}\to\EdgetextWidth

\def\Clipping{\clip[
   width=2mm,height=1ph,
   % -20 is an estimated correction
   hoffset=\dimexpr\measure{paperthickness}*(\userpage-20)\relax,
]{\rotate[rotation=90]{\Edgetext}}}

\startsetups[CutSetupL]
\resetlayer[Cut]
\setlayer[Cut][
   x=\dimexpr -1mm\relax,
   y=\dimexpr (1ph - \EdgetextWidth)/2\relax,
]{\mirror{\Clipping}}
\stopsetups

\startsetups[CutSetupR]
\resetlayer[Cut]
\setlayer[Cut][
   x=\dimexpr 1pw - 1mm\relax,
   y=\dimexpr (1ph - \EdgetextWidth)/2\relax,
]{\Clipping}
\stopsetups

\setupbackgrounds[leftpage][background=Cut,state=repeat,setups=CutSetupL]
\setupbackgrounds[rightpage][background=Cut,state=repeat,setups=CutSetupR]

\showframe
\setuplayout[
   location=middle,
   marking=on,
]
\setuppagenumbering[alternative=doublesided]

\starttext

\measure{bulkthickness}

\dorecurse{100}{
empty page

\userpage/\lastuserpage

\page
}

\stoptext

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If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________