Re: [NTG-context] Pass a lua table to metapost

8 Dec 2014


      On 12/7/2014 8:25 PM, DesdeChaves wrote:
...
I would like to pass the lua table keys and values to metapost. In the
keys i have information about the paths names and in the values i have
information about the label that should be draw in the center of each
path (unitsquare).
In my code (see attach) the table in question is
"weekdays_number_and_name".
I know that is possible to pass a array from metapost to lua. Is the
reverse possible?
it's possible to ask values from within mp:

\starttext

\startluacode
document.variables = {
     labels = {
         "one",
         "two",
         "three",
     }
}
\stopluacode

\startMPpage
     numeric dx, dy;
     dx = 4.4cm;
     dy = 0.53cm;
     path b[];
     for i=1 upto lua("mp.print(\#document.variables.labels)") :
         b[i] = unitsquare xscaled dx yscaled dy shifted (0, (i-1)*dy);
         draw b[i];
         label(lua("mp.quoted(document.variables.labels[" & decimal i & 
"])"), center b[i]);
     endfor
\stopMPpage

\stoptext


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