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+\section{Lines}
+
+\subsection{Direct definition}
+
+The object \texttt{line} defines a line (or a series of line
+segments). We use the option \verb+args+ to specify the points:
+\texttt{[object=line,args=$A_0$ $A_1$ \ldots $A_n$]}
+
+We can also define a line that has been transformed using a
+translation, a rotation, a homothety, etc., as though it were a
+polygon.
+
+\begin{LTXexample}[width=7.5cm]
+\begin{pspicture}(-3,-3)(4,3.5)%
+\psframe*[linecolor=blue!50](-3,-3)(4,3.5)
+\psset{lightsrc=50 20 20,viewpoint=50 30 15,Decran=60}
+\psset{solidmemory}
+\psSolid[object=grille,
+ base=-3 0 -3 3,
+ linewidth=0.5\pslinewidth,linecolor=gray,]
+%% definition du plan de projection
+\psSolid[object=plan,
+ definition=equation,
+ args={[1 0 0 0] 90},
+ base=-3.2 3.2 -2.2 2.2,
+ name=monplan,
+ planmarks]
+\psset{plan=monplan}
+\psSolid[object=plan,
+ args=monplan,
+ linecolor=gray!40,
+ plangrid,
+ action=none]
+\psProjection[object=line,
+ args=-1 0 -3 1 1 2,
+ name=P]
+\psProjection[object=line,
+ definition=rotatepol,
+ linecolor=blue,
+ args=P -1 0 -45]
+%% du code jps dans la definition
+\psProjection[object=line,
+ definition={2 -2 addv} papply,
+ linestyle=dashed,
+ args=P]
+\composeSolid
+\axesIIID(4,2,2)(5,4,3)
+\end{pspicture}
+\end{LTXexample}
+
+\endinput