<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-5-17 on page 394.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
%
\makeatletter
\newcommand\xyPlain[1]{%
  \ThreeDput[normal=0 0 1](0,0,0){% xy-plane
    \psgrid(0,0)(#1,#1)%
    \psline{-&gt;}(0,0)(0,#1)
    \psline{-&gt;}(0,0)(#1,0)
    \ifdim\psk@gridlabels pt&gt;\z@
      \uput[180]{0.2}(0,#1){$y$}%
      \uput[-90]{0.2}(#1,0){$x$}%
    \fi}}
\newcommand\xzPlain[1]{%
  \ThreeDput[normal=0 -1 0](0,0,0){% xz-plane
    \psgrid(0,0)(#1,#1)%
    \psline{-&gt;}(0,0)(0,5)
    \psline{-&gt;}(0,0)(#1,0)
    \ifdim\psk@gridlabels pt&gt;\z@
      \uput[180]{0.2}(0,#1){$z$}%
      \uput[-90]{0.2}(#1,0){$x$}%
    \fi}}
\newcommand\yzPlain[1]{%
  \ThreeDput[normal=1 0 0](0,0,0){% yz-plane
    \psgrid(0,0)(#1,#1)%
    \psline{-&gt;}(0,0)(0,#1)
    \psline{-&gt;}(0,0)(#1,0)
    \ifdim\psk@gridlabels pt&gt;\z@
      \uput[180]{0.2}(0,#1){$z$}%
      \uput[-90]{0.2}(#1,0){$y$}%
    \fi}}
\def\IIIDKOSystem{\@ifnextchar[{\IIIDKOSystem@i}{\IIIDKOSystem@i[]}}
\def\IIIDKOSystem@i[#1]#2{%
  \addto@par{#1}%
  \use@par%
  \xyPlain{#2}\xzPlain{#2}\yzPlain{#2}}
\makeatother
\AtBeginDocument{\psset{unit=0.95}}

\StartShownPreambleCommands
\usepackage{pstricks,pst-3d}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-4.5,-3.5)(3,4.75)
\psset{subgriddiv=0,griddots=10,gridlabels=7pt,viewpoint=1 1.5 1}
\IIIDKOSystem[gridlabels=0pt]{5}
\ThreeDput[normal=0 0 1]
   {\psline[linewidth=3pt,linecolor=blue]{-&gt;}(4,4)(4,5.5)  % xy plane
    \uput[90](4,5.5){\rotateleft{\textcolor{blue}{$\vec{n}_A$}}}}
\ThreeDput[normal=0 -1 0]
   {\psline[linewidth=3pt,linecolor=green]{-&gt;}(4,0)(5.5,0) % xz plane
    \uput[90](5.5,0){\psscalebox{-1 1}{\textcolor{green}{$\vec{n}_B$}}}}
\ThreeDput[normal=1 0 0]
   {\psline[linewidth=3pt,linecolor=red]{-&gt;}(0,4)(0,5.5)   % yz plane
    \uput[0](0,5.5){$\vec{n}_{top}$}} % cube and axes
\ThreeDput[normal=0 0 1](0,0,4){ \psframe*[linecolor=.!50](4,4)
    \rput(2,2){\Huge\textbf{TOP}}}
\ThreeDput[normal=0 1 0](4,4,0){\psframe*[linecolor=.!75](4,4)
    \rput(2,2){\Huge\textbf{side A}}}
\ThreeDput[normal=1 0 0](4,0,0){\psframe*[linecolor=.!25](4,4)
    \rput(2,2){\Huge\textbf{side B}}}
% the small axes
\ThreeDput[normal=0 0 1](0,0,4){\psline(4,0)\uput[90](3,0){X$_{top}$}
    \psline(0,4)\uput[0](0,3){Y$_{top}$}}
\ThreeDput[normal=0 1 0](4,4,0){\psline(4,0)\uput[90](3,0){X$_{A}$}
    \psline(0,4)\uput[0](0,3){Y$_{A}$}}
\ThreeDput[normal=1 0 0](4,0,0){\psline(4,0)\uput[90](3,0){X$_{B}$}
    \psline(0,4)\uput[0](0,3){Y$_{B}$}}
\end{pspicture}
\end{document}
</pre></body></html>