%% 
%%  A DANTE-Edition example
%% 
%%  Example 30-03-2 on page 597.
%% 
%%  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{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks-add}

\begin{document}
\begin{pspicture}[showgrid](-1,0)(3,2)
  \pnode(-1,0){A}\pnode(3,2){B}
  \psline[linestyle=dashed](A)(B)
  \psRelLine[linecolor=blue,angle=30,
    linewidth=1.5pt](A)(B){0.5}{E}
  \qdisk(E){3pt}\uput[45](E){E}
  \psarc[nodesep=0]{<-}(-1,0){2.24}{26.57}{56.57}
\end{pspicture}
\end{document}