%% The LaTeX Graphics Companion, 2ed (first printing May 2007)

%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 6-6-29 on page 414.
%%
%% 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{231.83385pt}
\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=line,
drawStyle=xLines,
yPlotpoints=50,xPlotpoints=50,
linewidth=0.2pt](-4,4)(-4,4)
{\func}
\pstThreeDCoor[xMax=5,yMax=5,
zMax=3.5]
\end{pspicture}
\end{document}