par-ligne3D-en.tex
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	\section{Drawing a \Index{line}}

	This command is adapted from the macro \verb+\pstThreeDLine+ from the package
	\texttt{pst-3dplot} of Herbert \textsc{Voss}%
	\footnote{\url{http://tug.ctan.org/tex-archive/graphics/pstricks/contrib/pst-3dplot}.}

	We use \texttt{\textbackslash psLineIIID[options](x0,y0,z0)(x1,y1,z1)\ldots(xn,yn,zn)},
	with the following possible options:
	\begin{itemize}
	\item \texttt{\Lkeyword{linecolor}=colour};
	\item \texttt{\Lkeyword{doubleline}=true};
	\item \texttt{\Lkeyword{linearc}=value}.
	\end{itemize}
	It is not possible to put arrowheads at the ends of the lines.

	\begin{LTXexample}[width=6.5cm]
	\psset{viewpoint=50 20 30 rtp2xyz,Decran=50}
	\begin{pspicture}(-3,-4)(4,4)
	\psSolid[object=cube,a=4,action=draw*,
	fillcolor=magenta!20]%
	\psLineIIID[linecolor=blue,
	linewidth=0.1,linearc=0.5,
	doubleline=true](-2,-2,-2)(2,2,2)(2,2,-2)(2,-2,0)
	\psPoint(2,-2,0){A}\psPoint(-2,-2,-2){B}
	\psPoint(2,2,2){C}\psPoint(2,2,-2){D}
	\psdot[dotsize=0.2](A)\psdot[dotsize=0.2](B)
	\psdot[dotsize=0.2](C)\psdot[dotsize=0.2](D)
	\psLineIIID[linecolor=green]%
	(-2,-2,-2)(2,2,2)(2,2,-2)(2,-2,0)
	\psPolygonIIID[linecolor=red,
	fillstyle=vlines,linearc=0.5,
	linewidth=0.1](-2,-2,2)(-2,2,2)(2,2,2)(2,-2,2)
	\axesIIID(2,2,2)(4,4,4)
	\end{pspicture}
	\end{LTXexample}


	\endinput