When drawing with TikZ, I find sometime convenient to use polar coordinates (angle:distance), as in this MWE
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
[pole/.style={circle,draw=gray,fill=gray,thick,text width=2cm, align=center}]
\node[pole] (eur) at (60:3cm) {Europe};
\node[pole] (afr) at (300:3cm) {Afrique};
\node[pole] (amq) at (180:3cm) {Amérique};
\end{tikzpicture}
\end{document}
How can I get a similar effect using METAPOST ? I could'nt find direct answer in the manual. I am quite sure one can achieve the same with a good knowledge of geometry. It would be good for scripting.
So far, my METAPOST equivalent would be
beginfig(1);
u:=1cm ;
label(btex Amérique etex, (-3u,0) ) ;
label(btex Europe etex, (u,2u) ) ;
label(btex Afrique etex, (u,-2u) ) ;
endfig ;
end
Of course this are not polar coordinates and I am even not sure angles are the same as in TikZ. Since I am not a scientist, I would be glad to have some explanation if some geometry knowledge is required.