<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%% 
%%  A DANTE-Edition example
%% 
%% 
%%  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{375.57637pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-3dplot}
\def\oA{\pstThreeDLine[linecolor=blue,linewidth=3pt,arrows=c-&gt; ](0,0,0)(1,60,70)}
\def\oB{\pstThreeDLine[linecolor=red,linewidth=3pt,arrows=c-&gt;](0,0,0)(1,10,50)}
\def\oAB{\pstThreeDEllipse[beginAngle=58,endAngle=90](0,0,0)(1,140,40)(1,10,50)}

\begin{document}
\begin{pspicture}(-4.8,-1.75)(4.8,3.75)
\psset{unit=4cm,drawCoor,beginAngle=90,endAngle=180,linestyle=dotted}
\pstThreeDCoor[drawing=true, linewidth=1pt,linecolor=black,%
  linestyle=solid,xMin=0,xMax=1.1, yMin=0,yMax=1.1, zMin=0,zMax=1.1]
\pstThreeDEllipse(0,0,0)(-1,0,0)(0,1,0) \pstThreeDEllipse(0,0,0)(-1,0,0)(0,0,1)
\pstThreeDEllipse[beginAngle=0,endAngle=90](0,0,0)(0,0,1)(0,1,0)
\psset{SphericalCoor,linestyle=solid}
\pstThreeDDot[dotstyle=none](1,10,50)  \pstThreeDDot[dotstyle=none](1,60,70)
\pscustom[fillstyle=crosshatch,hatchcolor=yellow,linestyle=none]{\oB\oAB\oA}
\oA \oB \oAB
\pstThreeDPut[origin=lb](1.1,60,70){$\vec\Omega_1$}
\pstThreeDPut[origin=rb](1.2,10,50){$\vec\Omega_2$}
\pstThreeDPut[origin=lb](1,10,65){$\gamma_{12}$}
\end{pspicture}
\end{document}
</pre></body></html>