Metapost in LaTeX (gmp package) - not working

Question

I try to use metapost code inside LaTeX, and I only receive MP Icon insted of dediecated picture:

example of code which I want to produce:

\documentclass[]{article}
\usepackage[T1]{fontenc}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\selectlanguage{polish}
\usepackage{indentfirst}
\usepackage[shellescape, latex]{gmp}
\gmpoptions{everymp={input expressg;}}
\usepackage{amsmath}
\usepackage[top = 2.50cm, bottom = 2.50cm, left   = 2.50cm, right  = 2.50cm]{geometry}
%opening
\title{Pole wielokąta. (nr 69, str. 30)}
\author{Adam Kasprzak}
\begin{document}
%\maketitle
\section{Treść}
Dane są dwa współśrodkowe okręgi o promieniach $r=/sgrt{3}$ cm i $R=2$ cm. Pewien wielokąt jest opisany na okręgu o promieniu $r$ i jest wpisany w okrąg o promieniu $R$. Znajdź pole tego wielokąta.
\begin{figure}[htp]
\centering

\begin{mpost}

    z0 = origin;

    drawroundedbox(0, 2.5cm, 3cm, 5mm)();

\end{mpost}


\end{figure}
blablabla
\end{document}

allways the same result:

what does "use shell escape" mean? probably this is the problem O.o — Adam Marek Kasprzak, Dec 19 '22 at 20:14
use pdflatex --shell-escape file.tex (the package warns you: Package gmp Warning: Ensure that you have enabled the shell escape feature, — David Carlisle, Dec 19 '22 at 20:16
I just type it on the command line, or your editor could be configured to do it for you — David Carlisle, Dec 19 '22 at 20:20
ok, I added it in cofigaration according to this advise: https://tex.stackexchange.com/questions/598818/how-can-i-enable-shell-escape/598924#598924
but after this functions like "/sgrt{3}" do not works O.o do you know how to fix it? — Adam Marek Kasprzak, Dec 19 '22 at 20:25
I don't think you can leave the second argument to drawroundedbox empty. — Thruston, Dec 19 '22 at 22:23
/sgrt does not look like a regular TeX control word. Did you mean \sqrt ? — Thruston, Dec 19 '22 at 22:24
you right, my mistake :p now it works perfectly, thanks to you all! — Adam Marek Kasprzak, Dec 19 '22 at 22:56

score 2 · Answer 1 · answered Dec 19 '22 at 23:00

You need

to run pdflatex with the -shell-escape command line option;
to put something inside the box, even nothing to print, but btex...etex is necessary.

\documentclass[]{article}
\usepackage[T1]{fontenc}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\selectlanguage{polish}
\usepackage{indentfirst}
\usepackage[shellescape, latex]{gmp}
\gmpoptions{everymp={input expressg;}}
\usepackage{amsmath}
\usepackage[top = 2.50cm, bottom = 2.50cm, left   = 2.50cm, right  = 2.50cm]{geometry}
%opening
\title{Pole wielokąta. (nr 69, str. 30)}
\author{Adam Kasprzak}
\begin{document}
%\maketitle
\section{Treść}
Dane są dwa współśrodkowe okręgi o promieniach $r=\sqrt{3}$ cm i $R=2$ cm. 
Pewien wielokąt jest opisany na okręgu o promieniu $r$ i jest wpisany w okrąg 
o promieniu $R$. Znajdź pole tego wielokąta.
\begin{figure}[htp]
\centering
\begin{mpost}
z0 = origin;
drawroundedbox(0, 2.5cm, 3cm, 5mm)(btex etex);
\end{mpost}
\end{figure}
blablabla
\end{document}

score 0 · Answer 2 · answered Dec 19 '22 at 22:34

Alternatively you can do the whole of this with lualatex using the luamplib package, which is a bit more modern, and avoids mucking about with shell escape.

Here is the OP script updated for luamplib:

\documentclass{article}
\usepackage[polish]{babel}
\selectlanguage{polish}
\usepackage{indentfirst}
\usepackage{luamplib}
\mplibtextextlabel{enable}
\everymplib{input expressg beginfig(0);}\everyendmplib{endfig;}
\usepackage{amsmath}
\usepackage[top = 2.50cm, bottom = 2.50cm, left = 2.50cm, right = 2.50cm]{geometry}
%opening
\title{Pole wielokąta. (nr 69, str. 30)}
\author{Adam Kasprzak}
\begin{document}
%\maketitle
\section{Treść}
Dane są dwa współśrodkowe okręgi o promieniach $r=\sqrt{3}$ cm i $R=2$ cm.
Pewien wielokąt jest opisany na okręgu o promieniu $r$ i jest wpisany w okrąg o
promieniu $R$. Znajdź pole tego wielokąta.
\begin{figure}[htp]
    \centering
    \begin{mplibcode}
        z0 = origin;
        drawroundedbox(0, 2.5cm, 3cm, 5mm)("Witaj $e=mc^2$")
    \end{mplibcode}
\end{figure}
blablabla
\end{document}

Compile this with lualatex to get this:

good to know about this option, thanks! – Adam Marek Kasprzak Dec 19 '22 at 22:57 — Adam Marek Kasprzak, Dec 19 '22 at 22:57

Metapost in LaTeX (gmp package) - not working

2 Answers2