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\documentclass[a4paper]{article}
\usepackage{geometry}
\parindent=0pt
\usepackage{pstricks,pst-vue3d}
%
\definecolor{marron}{rgb}{1,0.55,0}
\def\Sol{%
\psset{normaleLongitude=90,normaleLatitude=90}
\FrameThreeD[fillcolor=lightgray,fillstyle=solid](0,0,-2)(2,-2)(-2,2)
\QuadrillageThreeD[grille=.5,linecolor=red](0,0,-2)(-2,-2)(2,2)%
\QuadrillageThreeD[grille=0.75,linecolor=cyan](0,0,-2)(-2,-2)(2,2)%
}
\def\chaise{%
\FrameThreeD[normaleLatitude=0,normaleLongitude=0,%
fillcolor=marron,fillstyle=solid](-0.8,1,2)(0.2,0)(1.8,1)
\CubeThreeD[A=.1,B=0.1,C=0.9](0.9,-0.9,-1.1)
\CubeThreeD[A=.1,B=0.1,C=0.9](0.9,0.9,-1.1)
\CubeThreeD[A=.1,B=0.1,C=2](-0.9,0.9,0)
\CubeThreeD[A=.1,B=0.1,C=2](-0.9,-0.9,0)
\CubeThreeD[A=0.9,B=1,C=0.1](0.1,0,-0.1)
}
\begin{document}
\begin{center}
\begin{pspicture}(-5.5,-7)(5,4.5)
\psset{THETA=30,PHI=20,Dobs=10,Decran=20}
\Sol\chaise
\pNodeThreeD(-0.5,-0.3,0){littleChair}
\rput[lC](littleChair){%
\psset{THETA=30,PHI=20,Dobs=100,Decran=20}
\Sol\chaise%
}
\end{pspicture}
\end{center}
\end{document}
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