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
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