%%
%% A DANTE-Edition example
%%
%% Example 36-00-70 on page 796.
%%
%% 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{201.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-solides3d}
\begin{document}
\psset{unit=0.75}
\begin{pspicture}(-6.5,-3)(7,11)
\psset{lightsrc=10 -20 50,viewpoint=50 -20 20 rtp2xyz,Decran=50}
\psSolid[object=grille,base=-4 4 -4 4,
linecolor=lightgray,linewidth=0.5\pslinewidth]%
\psSolid[object=grille,base=-4 4 0 8,
linecolor=lightgray,RotX=90,
linewidth=0.5\pslinewidth](0,4,0)
\psSolid[object=grille,base=-4 4 -4 4,
linecolor=lightgray,RotY=90,
linewidth=0.5\pslinewidth](-4,0,4)
\defFunction[algebraic]{helice}(t)%
{1.3*(1-cos(2.5*t))*cos(6*t)}
{1.3*(1-cos(2.5*t))*sin(6*t)}{t}
\defFunction[algebraic]{helice_xy}(t)%
{1.3*(1-cos(2.5*t))*cos(6*t)}
{1.3*(1-cos(2.5*t))*sin(6*t)}{0}
\defFunction[algebraic]{helice_xz}%
(t){1.3*(1-cos(2.5*t))*cos(6*t)}{4}{t}
\defFunction[algebraic]{helice_yz}%
(t){-4}{1.3*(1-cos(2.5*t))*sin(6*t)}{t}
\psset{range=0 8}
\psSolid[object=courbe,r=0,linecolor=blue,
linewidth=0.05,resolution=360,
normal=0 0 1,function=helice_xy]
\psSolid[object=courbe,r=0,
linecolor=green,linewidth=0.05,
resolution=360,normal=0 0 1,
function=helice_xz]
\psSolid[object=courbe,r=0,
linewidth=0.05,resolution=360,
normal=0 0 1,function=helice_yz]
\psSolid[object=courbe,r=0,
linecolor=red,linewidth=0.1,
resolution=360,function=helice]
\end{pspicture}
\end{document}
