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

\input{figsDefs.tex}

\begin{document}
	
\begin{tikzpicture}%
	% origine
	\draw[,-] (0,-.1) -- (0,+.1) node[below left,pos=0.6] {$O$};%
	\draw[,-] (-.1,0) -- (.1,0) node[below] {};%
	% repère
	\draw[repCol,->] (0,0) -- (1,0) node[below right,pos=0.8] {$\vec{e}_x$};%
	\draw[repCol,->] (0,0) -- (0,1) node[above right,pos=0.8] {$\vec{e}_y$};%
	
	\begin{scope}[shift={(3,0)}]
		% origine
		\draw[,-] (0,-.1) -- (0,+.1) node[below left,pos=0.6] {$O$};%
		\draw[,-] (-.1,0) -- (.1,0) node[below] {};%
		% repère
		\draw[repCol,->, rotate around={-30:(0,0)}] (0,0) -- (1,0) node[below,pos=0.8] {$\vec{e}_x$};%
		\draw[repCol,->, rotate around={-30:(0,0)}] (0,0) -- (0,1) node[right,pos=0.8] {$\vec{e}_y$};%
	\end{scope}
\end{tikzpicture}%


\end{document}