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%%
%% A DANTE-Edition example
%%
%%
%% Copyright (C) 2010 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}
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