Calculating a value in metapost, and using it in ConTeXt
Hello, Is it possible to calculate the position of something in Metapost, and to export that value to TeX such that I can use it in setups and things? I thought perhaps I could \def inside btex..etex. Here's a minimal example trying to illustrate the idea: \startuniqueMPgraphic{canon} path p, q; h := \overlayheight; w := \overlaywidth; % imagine this is more complex p = (0, 0) -- (w, .5h); q = (0, h) -- (w, 0); draw p; draw q; z0 = p intersectionpoint q; % btex \def\Z{ ypart z0 } etex; \stopuniqueMPgraphic \defineoverlay[canon][\uniqueMPgraphic{canon}] \setupbackgrounds[page][background=canon] \setuplayout[topspace=0pt, header=0pt, height=22cm] % here I would use \Z \showgrid \starttext xyz \stoptext Thanks, -- Kate
On 5/26/2015 9:17 PM, Kate F wrote:
Hello,
Is it possible to calculate the position of something in Metapost, and to export that value to TeX such that I can use it in setups and things?
it depends on what you want to calculate \startMPcalculation path p, q; h := PaperHeight; w := PaperWidth; p = (0, 0) -- (w, .5h); q = (0, h) -- (w, 0); z0 = p intersectionpoint q; passvariable("z",ypart z0) ; \stopMPcalculation \setuplayout [topspace=0pt, header=0pt, height=\MPrunvar{z}bp] \showgrid \starttext xyz:\MPrunvar{z} \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
On 27 May 2015 at 00:18, Hans Hagen
On 5/26/2015 9:17 PM, Kate F wrote:
Hello,
Is it possible to calculate the position of something in Metapost, and to export that value to TeX such that I can use it in setups and things?
it depends on what you want to calculate
\startMPcalculation path p, q;
h := PaperHeight; w := PaperWidth;
p = (0, 0) -- (w, .5h); q = (0, h) -- (w, 0);
z0 = p intersectionpoint q;
passvariable("z",ypart z0) ; \stopMPcalculation
\setuplayout [topspace=0pt, header=0pt, height=\MPrunvar{z}bp]
\showgrid
\starttext xyz:\MPrunvar{z} \stoptext
Wonderful! -- Kate
participants (2)
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Hans Hagen -
Kate F