%% 
%%  A DANTE-Edition example
%% 
%%  Example 29-02-16 on page 572.
%% 
%%  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{81.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-eucl}

\begin{document}
\begin{pspicture}(2,2)
 \psset{CodeFig=true,CodeFigColor=red,RightAngleType=german}
 \pstGeonode[PosAngle={-90,-90,0,0}]{A}(2,0){B}(0.5,2){C}(1.5,2){D}
 \pstLineAB[linewidth=1pt]{A}{B}
 \pstProjection{A}{B}{C}[I]  \pstProjection{A}{B}{D}
\end{pspicture}
\end{document}