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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 6-7-11 on page 424.
%%
%% 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{207.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks-add}
\StopShownPreambleCommands
\begin{document}
\psset{unit=4}
\begin{pspicture}(1,1)\psgrid[subgriddiv=5]
\psplotDiffEqn[whichabs=0,whichord=1,
method=rk4,algebraic,%
linecolor=blue,plotpoints=500,
showpoints=true]{0}{10}{0 0}%
{cos(Pi*x^2/2)|sin(Pi*x^2/2)}
\rput(0.5,0.9){\large Spiral of Cornu}
\end{pspicture}
\end{document}
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