%% 
%%  A DANTE-Edition example
%% 
%%  Example 23-06-68 on page 419.
%% 
%%  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{225.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-solides3d}

\begin{document}
\psset{lightsrc=30 30 25,
  viewpoint=50 40 30 rtp2xyz,Decran=30}
\begin{pspicture}(-6,-2)(7,4)
\psSurface[fillcolor=red!50,ngrid=25 25,
  incolor=yellow,linewidth=0.01,grid,
  axesboxed,hue=0 1,Zmin=-1,Zmax=1]%
  (-4,-4)(4,4){ y dup mul x dup mul
    add 3 div RadtoDeg sin }
\end{pspicture}
\end{document}
