%% %% A DANTE-Edition example %% %% Example 34-02-4 on page 745. %% %% 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,multido} \begin{document} \psset{lightsrc=75 -63 17,viewpoint=100 -45 10 rtp2xyz,Decran=50,fontsize=50} \multido{\iRotZ=0+10}{36}{% \begin{pspicture*}(-5,-3)(5,4) \psframe(-5,-3)(5,4)\pstVerb{/iRotZ \iRotZ\space def}% \psSolid[object=grille,base=-7 7 -7 7,ngrid=1. 1.,action=draw,linecolor=red](0,0,-3.4) \defFunction[algebraic]{helix}(u,v)% {2*(0.4*cos(v)-1)*cos(u)}{2*(0.4*cos(v)-1)*sin(u)}{0.4*sin(v)+0.3*u} \codejps{ /helice -10 10 0 6.28 [60 0.4] {helix} newsurfaceparametree {0 0 iRotZ rotateOpoint3d} solidtransform {0 -4 0 translatepoint3d} solidtransform dup solidfacesreverse def /helicesym helice dupsolid exch pop {[0 1 0 0] symplan3d} solidtransform dup solidfacesreverse def /solidgrid false def solidlightOn helicesym dup [0 1 0.5 1] solidputhuecolors dup (White) inputcolors drawsolid** .5 setfillopacity [0 1 0 0] eq2plan dup [-7 7 -5 3.4] planputrange dup [14. 8.4] planputngrid newplan dup videsolid dup (0.7 0.7 1 setrgbcolor) (0.7 0.7 1 setrgbcolor) inoutputcolors drawsolid** helice dup [0 1 0.5 1] solidputhuecolors dup (White) inputcolors drawsolid** } \end{pspicture*} \newpage} \end{document}