%%
%% Ein Beispiel der DANTE-Edition
%%
%% 7. Auflage
%%
%% Beispiel 32-03-26 auf Seite 739.
%%
%% Copyright (C) 2016 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{145.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-optexp}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid](0,-0.3)(3,3.3)
\pnode(0,2.5){A}\pnode(2,2.5){B}\pnode(2,1.5){C}
\mirror[labelangle=-45](A)(B)(C){M}
\optbox[position=start, labeloffset=0,
labelref=relative](C)(B){box}
\drawbeam(A){1}{2}
\psdot(A)\uput[90](A){A}\psdot(B)
\uput[-135](B){B}\psdot(C)\uput[45](C){C}
\end{pspicture}
\end{document}
