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+\def\CubeSide#1#2#3#4{%
+ \ThreeDput[normal=#1](#2){%
+ \psframe*[linecolor=#3](4,4)
+ \rput(2,2){\footnotesize#4}}
+}
+
+\catcode`\<=12
+\catcode`\>=12
+
+\def\TheCube#1#2{%
+ \begin{pspicture}(-9,-7)(9,9)
+ \bfseries
+ \ifcase #1 \relax
+ \or %1
+ \psset{viewpoint=-1 -1 #2}
+ \rput[l](-8,-6){{\normalsize Viewpoint: -1 -1 #2}}
+ \ifnum#2>0\ThreeDput[normal=0 0 1]{\psgrid(-3,-3)(6,6)}\fi
+ \CubeSide{-1 0 0}{0,4,0}{yellow}{FRONT}
+ \CubeSide{0 -1 0}{0,0,0}{blue}{FRONT}
+ \or %2
+ \psset{viewpoint=1 -1 #2}
+ \rput[l](-8,-6){{\normalsize Viewpoint: 1 -1 #2}}
+ \ifnum#2>0\ThreeDput[normal=0 0 1]{\psgrid(-3,-3)(6,6)}\fi
+ \CubeSide{0 -1 0}{0,0,0}{blue}{FRONT}
+ \CubeSide{1 0 0}{4,0,0}{white}{BACK}
+ \or %3
+ \psset{viewpoint=1 1 #2}
+ \rput[l](-8,-6){{\normalsize Viewpoint: 1 1 #2}}
+ \ifnum#2>0\ThreeDput[normal=0 0 1]{\psgrid(-3,-3)(6,6)}\fi
+ \CubeSide{1 0 0}{4,0,0}{white}{BACK}
+ \CubeSide{0 1 0}{4,4,0}{green}{BACK}
+ \or %4
+ \psset{viewpoint=-1 1 #2}
+ \rput[l](-8,-6){{\normalsize Viewpoint: -1 1 #2}}
+ \ifnum#2>0\ThreeDput[normal=0 0 1]{\psgrid(-3,-3)(6,6)}\fi
+ \CubeSide{0 1 0}{4,4,0}{green}{BACK}
+ \CubeSide{-1 0 0}{0,4,0}{yellow}{FRONT}
+ \fi
+ \ifnum#2<0
+ \CubeSide{0 0 -1}{0,4,0}{magenta}{BOT}
+ \else
+ \CubeSide{0 0 1}{0,0,4}{red}{TOP}
+ \fi
+ \end{pspicture}
+}
+
+\psset{unit=.3cm,subgriddiv=0}
+\begin{tabular}{cc}
+ \TheCube{1}{1}&
+ \TheCube{2}{1}\\[-10pt]
+ \TheCube{3}{1}&
+ \TheCube{4}{1}\\
+\end{tabular}