\documentclass[convert=true,convert={convertexe={convert},density=1200,outext=.png}]{standalone}

\input{figsDefs.tex}

\begin{document}
	
\begin{tikzpicture}%
	% objet
	\draw[shift={(2.95cm,1.5cm)}] \myObj node[below right] {objet};
	% vecteurs
	\draw[->,>=latex,thick] (0,0) -- (3,1.5) node[below,pos=0.6] {$\vec{r}$};%
	% angle
	\draw[-] (0:.8cm) arc (0:27:0.8cm);%
	\draw(20:1cm) node[right] {$\alpha$};
	% origine
	\draw[-] (0,-.1) -- (0,+.1) node[below left,pos=0.6] {$O$};%
	\draw[-] (-.1,0) -- (.1,0) node[below] {};%
	% repère
	\draw[->,>=latex] (0,0) -- (1,0) node[below right,pos=0.8] {$\vec{e}_x$};%
	\draw[->,>=latex] (0,0) -- (0,1) node[above right,pos=0.8] {$\vec{e}_y$};%
\end{tikzpicture}%

\end{document}