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+\section{Construction from scratch}
+
+The object \verb+new+ constructs a solid. Two parameters are used: \verb+sommets+
+which indicates the list of coordinates of the different vertices, and \verb+faces+ which
+gives the list of faces of the solid; a face is characterized by a list of the indices of its vertices, listed
+in counterclockwise order
+when the face is viewed from the exterior of the solid.
+
+\clearpage
+
+\subsection{Example 1: a house}
+\begin{LTXexample}[width=6.5cm]
+\psset{unit=0.5}
+\psset{lightsrc=10 -20 50,viewpoint=50 -20 30 rtp2xyz,Decran=50}
+\begin{pspicture*}(-7,-4)(7,7)
+\psSolid[object=new,
+ sommets=
+ 2 4 3 -2 4 3 -2 -4 3 2 -4 3
+ 2 4 0 -2 4 0 -2 -4 0 2 -4 0
+ 0 4 5 0 -4 5,
+ faces={
+ [0 1 2 3] [7 6 5 4] [0 3 7 4]
+ [3 9 2] [1 8 0] [8 9 3 0]
+ [9 8 1 2] [6 7 3 2] [2 1 5 6]},
+ num=all,show=all,action=draw]
+\end{pspicture*}
+\end{LTXexample}
+
+Note that the solid \verb+new+ uses the same options as the other solids.
+For example, we give the same solid as above below, using the parameters
+\verb+hollow+, \verb+incolor+, \verb+fillcolor+, and \verb+rm+.
+
+%% example 2
+\begin{LTXexample}[width=6.5cm]
+\psset{unit=0.5}
+\psset{lightsrc=10 -20 50,viewpoint=50 -20 30 rtp2xyz,Decran=50}
+\begin{pspicture*}(-7,-3.5)(7,7.5)
+\psSolid[object=new,fillcolor=red!50,incolor=yellow,
+ action=draw**,hollow,rm=2,
+ sommets=
+ 2 4 3 -2 4 3 -2 -4 3 2 -4 3
+ 2 4 0 -2 4 0 -2 -4 0 2 -4 0
+ 0 4 5 0 -4 5,
+ faces={ [0 1 2 3][7 6 5 4][0 3 7 4]
+ [3 9 2] [1 8 0] [8 9 3 0][9 8 1 2]
+ [6 7 3 2][2 1 5 6]},
+ num=all,show=all]
+\end{pspicture*}
+\end{LTXexample}
+
+\subsection{Example 2: a hyperboloid with a fixed radius}
+
+%\psset{lightsrc=10 20 30,SphericalCoor=true,viewpoint=50 20 30}
+%\psset{SphericalCoor=true,viewpoint=50 20 30}
+
+
+As always, the options of the macro \bs{psSolid} can handle Postscript code, even \textit{jps code}
+
+Unlike an example in pure PostScript, where we use the parameters
+$a$, $b$ et $h$ which are transmitted by the options of PSTricks.
+In this way one obtains a variable solid constructed from scratch.
+
+Remark: the code being used comes from a jps source used in practice, as in:
+
+\noindent\url{http://melusine.eu.org/lab/bjps/solide/tour.jps}
+\begin{LTXexample}[width=6.5cm]
+\psset{unit=0.75}
+\psset{lightsrc=10 -20 50,viewpoint=50 -20 30 rtp2xyz,Decran=50}
+\begin{pspicture*}(-5,-5)(3,5)
+\psSolid[object=new,fillcolor=red!50,incolor=yellow,
+ hollow, a=10, %% nb d'etages
+ b=20, %% diviseur de 360, nb de meridiens
+ h=8, %% hauteur
+ action=draw**,sommets=
+ /z0 h neg 2 div def
+ a -1 0 {
+ /k exch def
+ 0 1 b 1 sub {
+ /i exch def
+ /r z0 h a div k mul add dup mul 4 div 1 add sqrt def
+ 360 b idiv i mul cos r mul 360 b idiv i mul sin r mul
+ z0 h a div k mul add
+ } for
+ } for,
+ faces={
+ 0 1 a 1 sub {
+ /k exch def
+ k b mul 1 add 1 k 1 add b mul 1 sub {
+ /i exch def
+ [i i 1 sub b i add 1 sub b i add]
+ } for
+ [k b mul k 1 add b mul 1 sub k 2 add b mul 1 sub k 1 add b mul]
+ } for
+}]
+\end{pspicture*}
+\end{LTXexample}
+
+
+
+\subsection{Example 3: importing external files}
+
+
+From a file describing a solid in a particular format (other than \texttt{.obj} or \texttt{.off}),
+we can create a \texttt{.dat} file containing the coordinates of the vertices,
+and another \texttt{.dat} file containing the tables of indices of the vertices on each face.
+These files can then be entered as parameters \verb+sommets+ and \verb+faces+
+when using the Postscript instruction \verb+run+.
+
+
+In the example below, the files \verb+sommets_nefer.dat+
+and \verb+faces_nefer.dat+ have been placed in the directory of the compiler.
+
+\begin{LTXexample}[width=5.5cm]
+\psset{unit=0.4}
+\definecolor{AntiqueWhite}{rgb}{0.98,0.92,0.84}
+\begin{pspicture}(-7,-9)(7,7)
+\psset{lightsrc=30 -40 10}
+\psset{viewpoint=50 -50 20 rtp2xyz,Decran=50}
+\psset{RotX=90,sommets= (sommets_nefer.dat) run}
+\psSolid[object=new,fillcolor=AntiqueWhite,linewidth=0.5\pslinewidth,
+ faces={(faces_nefer.dat) run}]%
+\psSolid[object=new,fillcolor=red,linewidth=0.5\pslinewidth,
+ faces={(faces_nefer_levres.dat) run}]%
+\psSolid[object=new,fillcolor=black,
+ faces={(faces_nefer_sourcils.dat) run}]%
+\end{pspicture}
+\hfill
+\begin{pspicture}(-7,-9)(7,7)
+\psset{lightsrc=-10 -40 -5,lightintensity=.5}
+\psset{viewpoint=50 -80 10 rtp2xyz,Decran=50}
+\psset{RotX=90,RotZ=30,sommets= (sommets_nefer.dat) run}
+\psSolid[object=new,fillcolor=AntiqueWhite,linewidth=0.5\pslinewidth,
+ grid,faces={(faces_nefer.dat) run}]
+\psSolid[object=new,fillcolor=red,linewidth=0.5\pslinewidth,grid,
+ faces={(faces_nefer_levres.dat) run}]
+\psSolid[object=new,fillcolor=black,
+ faces={(faces_nefer_sourcils.dat) run}]
+\end{pspicture}
+\end{LTXexample}
+
+
+\endinput