Mojca Miklavec wrote:
> Hello,
>
> I have a "conversion" defined in the following way:
>
> \usesymbols[jmn]
> \defineconversion
> [gnuplot]
> [$\bullet$,
> $\circ$,
> $\star$,
> x,
> {\symbol[navigation 1][NextJump]}]
>
> I would like to use these symbols in a macro
> draw_symbol(x,y,number)
> so that
> draw_symbol(0,0,3)
> would draw a star in the origin.
>
> The problem is that I don't know:
> - how to use symbol sets inside MetaFun (verbatimtex \usesymbols[jmn]
> etex doesn't work here)
> - how to enable
> label(btex \convertnumber{gnuplot}{5} etex, (x,y))
> to work properly in metafun (no luck with verbatimtex ... etex again)
>
> Any hints would be appreciated.
>
==== test.tex ====
\starttext
\startMPenvironment [global]
\readfile{test-gnuplot}{}{}
\stopMPenvironment
\setupcolors[state=start]
\startMPcode
def the_symbol(expr n) =
textext("\GnuPlotSymbol{" & decimal n & "}")
enddef ;
def draw_symbol(expr x, y, n) =
draw the_symbol(n) shifted (x,y)
enddef ;
for i=1 upto 10 :
draw_symbol(i*10,i*10,i) withcolor red ;
endfor ;
\stopMPcode
\stoptext
=== test-gnuplot.tex ====
\defineconversion
[gnuplot]
[$\bullet$,
$\circ$,
$\star$,
x,
{\symbol[navigation 1][NextJump]}]
\unexpanded\def\GnuPlotSymbol#1%
{\convertnumber{gnuplot}{#1}}
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