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

\input{figsDefs.tex}

\begin{document}
	
\begin{tikzpicture}[rotate around={30:(1,2)}]%
	\path (1.5,-.5) node[shape=coordinate] (O) {};
	% trajectoire f=-0.25*(x+1)*(x-5)-1=-.25(x^2-4x-5)-1
	% deriv\'{e}e fp=-.5x+1
	\shorthandoff{:}
	\draw[-,blue,thick] plot[id=temp,smooth,domain=-1:5,samples=30] function{-0.25*(x+1)*(x-5)-1} node[below left] {$\Gamma$};
	\shorthandon{:}
	% vitesses
	\pgfmathsetmacro{\valX}{0};
	\pgfmathsetmacro{\valY}{-0.25*(\valX+1)*(\valX-5)-1};
	\draw[blue,fill=blue] (\valX,\valY) circle (0.05) node[left] (A) {$A$};
	\pgfmathsetmacro{\valPente}{-.5*\valX+1};
	\draw[->,>=latex,thick] (O) -- (\valX,\valY) node[above,pos=0.4] {$\vec{r}_0$};%
	\draw[->,>=latex,thick,vitCol] (\valX,\valY) -- +(1.5,1.5*\valPente) node[above left,pos=0.7] {$\vec{v}_0$};%
	\draw[->,>=latex,thick,accCol] (\valX,\valY) -- +(0,-1) node[right,pos=1] {$\vec{a}_0$};%
	\pgfmathsetmacro{\valX}{3.5};
	\pgfmathsetmacro{\valY}{-0.25*(\valX+1)*(\valX-5)-1};
	\draw[blue,fill=blue] (\valX,\valY) circle (0.05) node[above] (P) {$P$};
	\pgfmathsetmacro{\valPente}{-.5*\valX+1};
	\draw[->,>=latex,thick] (O) -- (\valX,\valY) node[below right,pos=0.4] {$\vec{r}(t)$};%
	\draw[->,>=latex,thick,vitCol] (\valX,\valY) -- +(1.5,1.5*\valPente) node[above,pos=0.7] {$\vec{v}(t)$};%
	\draw[->,>=latex,thick,accCol] (\valX,\valY) -- +(0,-1) node[right,pos=1] {$\vec{a}_0$};%
	% origine
	\path (O) node[below] {$O$};
%	\draw[-,rotate around={-30:(1,2)}] (O)+(0,-.1) -- +(0,+.1) node[below left,pos=0.6] {$O$};%
%	\draw[-,rotate around={-30:(1,2)}] (O)+(-.1,0) -- +(.1,0) node[below] {};%
\end{tikzpicture}%

\end{document}