%%
%% A DANTE-Edition example
%%
%% Example 11-03-13 on page 130.
%%
%% 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{153.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-plot}\SpecialCoor
\begin{document}
\begin{pspicture}[showgrid](3,3)
\pstVerb{/rad {180.0 mul 2 div} def}
\pscustom[plotpoints=200]{%
\psplot{0}{3}{x rad sin 1.5 add}
\gsave
\psline(! 3 dup rad sin 1.5 add)%
(!3 dup rad sin neg 1.5 add)
\psplot{3}{0}{x rad sin neg 1.5 add}
\fill[fillcolor=lightgray,fillstyle=solid]
\grestore
\psplot[liftpen=2]{3}{0}{x rad sin neg 1.5 add}}
\end{pspicture}
\end{document}
