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+%%
+%% A DANTE-Edition example
+%%
+%%
+%% Copyright (C) 2011 Herbert Voss
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+%%
+%% ====
+% Show page(s) 1
+%%
+\documentclass[]{article}
+\pagestyle{empty}
+\setlength\textwidth{375.57637pt}
+\setlength\parindent{0pt}
+
+\usepackage{pst-solides3d}
+
+\begin{document}
+\psset{viewpoint=50 50 20 rtp2xyz,lightsrc=25 37 17,Decran=30}
+\begin{pspicture}(-1.5,-1)(1.5,6)
+\psSolid[object=grille,base=-2 2 -2 2,ngrid=8]
+\psSolid[object=prisme,h=10,ngrid=20 2,hue=0 1 0.4 5,
+ base=.5 0 .5 .5 0 .5 -.5 .5 -.5 0 -.5 -.5 0 -.5 .5 -.5]
+\end{pspicture}
+%
+\begin{pspicture}(-1.5,-1)(1.5,6)
+\psSolid[object=grille,base=-2 2 -2 2,ngrid=8]
+\pstVerb{
+ /torsion { % x y z are on the stack
+ 2 dict begin % keep everything local
+ /M defpoint3d % save x y z coordinates
+ M % put x y z back on the stack
+ /z exch def % save z coordinate
+ pop pop % delete x y
+ M % put x y z on the stack
+ 0 0 z 18 mul % put 0 0 18*z on the stack
+ rotateOpoint3d % rotate point
+ end
+ } def }%
+\psSolid[object=prisme,h=10,ngrid=20 2,transform=torsion,hue=0 1 0.4 5,
+ base=.5 0 .5 .5 0 .5 -.5 .5 -.5 0 -.5 -.5 0 -.5 .5 -.5]
+\end{pspicture}
+\end{document}