%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-6-13 on page 407.
%% 
%%  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}
\StartShownPreambleCommands
\usepackage{pstricks,pst-3dplot}
\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 }
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-6,-3)(6,4)
  \psset{Alpha=45,Beta=15,unit=0.75}
  \psplotThreeD[plotstyle=curve,
     yPlotpoints=50,xPlotpoints=80,
     linewidth=0.5pt](-4,4)(-4,4){\func}
  \pstThreeDCoor[xMin=-1,xMax=5,yMin=-1,
                 yMax=5,zMin=-1,zMax=3.5]
\end{pspicture}
\end{document}
