% --- start of displayed preamble in the book ---
input featpost3Dplus2D
verbatimtex
%&latex
\documentclass{article}
\begin{document}
etex

% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
f := 1.1*(2,1,0.5);
ParallelProj := true;
kindofcube(false,true,(0,-0.5,0),
           90,0,0,1.2,0.1,0.4);
kindofcube(false,true,(0,0,0),
           0,0,0,0.5,0.1,0.8);
labelinspace(false,(0.45,0.1,0.65),
             (-0.4,0,0),(0,0,0.1),
    btex \framebox{\textsc{Label}} etex);
endfig;
end;