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diff --git a/Master/texmf-dist/doc/generic/pst-solides3d/doc-src/par-projectioncercle-en.tex b/Master/texmf-dist/doc/generic/pst-solides3d/doc-src/par-projectioncercle-en.tex new file mode 100644 index 00000000000..9993f01c6e0 --- /dev/null +++ b/Master/texmf-dist/doc/generic/pst-solides3d/doc-src/par-projectioncercle-en.tex @@ -0,0 +1,66 @@ +\section{Circles} + +\subsection{Direct definition} + +The object \Lkeyword{cercle} allows us to define and draw a \Index{circle}. +In the \texttt{pst-solides3d} package, a circle in 2D is defined +by its centre and radius. + +We use the option \Lkeyword{args} to specify the centre and radius of +the chosen circle. We can use coordinates or named variables. + +The argument \texttt{\Lkeyword{range}=$t_{\rm min}$ $t_{\rm max}$} allows %$ +us to specify an arc of the chosen circle. + +As for all the other object, we can save the circle data using the +option \Lkeyword{name}. + +\begin{LTXexample}[width=7.5cm] +\begin{pspicture}(-3,-3)(4,3.5)% +\psframe*[linecolor=blue!50](-3,-3)(4,3.5) +\psset{viewpoint=50 30 15,Decran=60} +\psset{solidmemory} +%% definition du plan de projection +\psSolid[object=plan, + definition=equation, + args={[1 0 0 0] 90}, + planmarks, + name=monplan] +\psset{plan=monplan} +%% definition du point A +\psProjection[object=point, + name=A, + text=A, + pos=ur](-2,1.25) +\psProjection[object=cercle, + args=A 1, + range=0 360] +\psProjection[object=cercle, + args=1 1 .5,linecolor=blue, + range=0 180] +\composeSolid +\end{pspicture} +\end{LTXexample} + +\subsection{Some other definitions} + +There are additional methods to define a circle in 2D. The options +\Lkeyword{definition} and \Lkeyword{args} give the following supported +methods: + +\begin{itemize} + +\item \texttt{\Lkeyword{definition}=\Lkeyword{ABcercle}}; +\texttt{\Lkeyword{args}=$A$ $B$ $C$}. + +A circle through the points $A$, $B$ +and $C$. + +\item \texttt{\Lkeyword{definition}=\Lkeyword{diamcercle}}; +\texttt{\Lkeyword{args}=$A$ $B$}. + +A circle with diameter $[AB]$. + +\end{itemize} + +\endinput |