%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-6-31 on page 415.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{222.234pt}
\newcommand*\func{ x 3 exp x y 4 exp mul add x 5
  div sub 10 mul 2.729 x dup mul y dup mul add
  neg exp mul 2.729 x 1.225 sub dup mul y dup
  mul add neg exp add }
\StartShownPreambleCommands
\usepackage{pstricks,pst-3dplot}
% \func as defined in Example 6-6-13
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-6,-3)(6,4)
  \psset{Beta=15,unit=0.75}
  \psplotThreeD[%
    plotstyle=curve,drawStyle=xyLines,%
    hiddenLine=true,%
    yPlotpoints=50,xPlotpoints=50,%
    linewidth=0.2pt](-4,4)(-4,4){\func}
  \pstThreeDCoor[xMax=5,yMax=5,zMax=3.5]
\end{pspicture}
\end{document}
