par-commandestrace-en.tex
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par-commandestrace-en.tex
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			\section{Commands for drawing}

			The parameter for \Index{drawing} comes with the key value \Lkeyword{action} within the command
			\Lcs{psSolid}.

			Four values are possible:
			\begin{compactitem}
			\item \Lkeyval{none}: nothing is drawn.
			\item \Lkeyval{draw}: draws the solid as a framework and sets up dashed lines for the hidden edges.
			\item \Lkeyval{draw*}: draws the solid with dashed lines for the hidden edges and colours the visible faces.
			\item \Lkeyword{draw**}: draws the solid with a painting algorithm, without the
			hidden edges and with colouration of the visible faces.
			\end{compactitem}
			\encadre{The key values \Lkeyval{draw} and \Lkeyword{draw*} only make sense for convex solids.}

			\begin{center}
			%%

			\psset{viewpoint=50 -20 30 rtp2xyz}
			%%
			\hfil
			\begin{pspicture}(-2.5,-2.5)(2.5,2.5)
			\psframe(-2.5,-2.5)(2.5,2.5)
			\psset{Decran=20}
			\psSolid[object=cube,action=draw,RotZ=20]%
			\rput(-1,-2){\texttt{draw}}
			\end{pspicture}
			\hfil
			%%
			\begin{pspicture}(-2.5,-2.5)(2.5,2.5)
			\psframe(-2.5,-2.5)(2.5,2.5)
			\psset{Decran=20}
			\psSolid[object=cube,action=draw*,fillcolor=magenta!20,RotZ=20]%
			\rput(-1,-2){\texttt{draw*}}
			\end{pspicture}
			\hfil
			%%
			\begin{pspicture}(-2.5,-2.5)(2.5,2.5)
			\psframe(-2.5,-2.5)(2.5,2.5)
			\psset{Decran=20}
			\psSolid[object=cube,fillcolor=magenta!20,RotZ=20]%
			\rput(-1,-2){\texttt{draw**}}
			\end{pspicture}
			\hfil
			%%
			\end{center}

			\endinput