%% 
%%  A DANTE-Edition example
%% 
%%  Example 36-00-106 on page 814.
%% 
%%  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{lightsrc=viewpoint,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-5,-3)(6,6)
\psSolid[object=grille,base=-4 4 -4 4](0,0,0)
\defFunction[algebraic]{paraboloid}(u,v)
   {4*sqrt(u/4)*cos(v)}
   {4*sqrt(u/4)*sin(v)}
   {-u+4}
\psSolid[object=surfaceparametree,base=0 4 0 pi neg,
  ngrid=20 20,incolor=red!40,fillcolor=yellow!50,
  intersectionplan={[0 1 0 0]},
  intersectioncolor=(bleu),
  intersectionlinewidth=2,
  intersectiontype=1,
  function=paraboloid]
\gridIIID[Zmin=0,Zmax=4,spotX=r](-4,4)(-4,4)
\end{pspicture}
\end{document}
