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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% The TeX-macros of the border-project %
% This file has version number 1.2a. %
% 16.07.1993 %
% (c) by Andreas Schrell, Wuppertal %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newskip\Randsep
\Randsep=3pt
\newif\ifnotempty
\def\ifne#1{\def\ifnetest{#1}\ifx\empty\ifnetest\notemptyfalse\else
\notemptytrue\fi\ifnotempty}
\def\hScanDef #1 #2 #3 (#4[#5]#6) {%
\setbox#1\hbox{\SEP#4\ifne{#4}\SEP\fi}%
\setbox#2\hbox{#5\SEP}%
\ifdim\wd#2>0pt\else
\errhelp{If you proceed now, you will enter an infinite loop...}%
\errmessage{A sequence [#5] given to \string\RandBox\space
has a width <= 0pt (\the\wd#2).
Type x or e!}%
\fi
\setbox#3\hbox{#6\ifne{#6}\SEP\fi}%
\MyNext}
\def\vScanDef #1 #2 #3 (#4[#5]#6) {%
\setbox#1\hbox{\vbox{\halign{##\cr#4\cr}\ifne{#4}\SEP\fi}}%
\setbox#2\hbox{\vbox{\halign{##\cr#5\cr}\SEP}}%
\ifdim\ht#2>0pt\else
\ifdim\dp#2>0pt\else
\errhelp{If you proceed now, you will enter an infinite loop...}%
\errmessage{A sequence [#5] given to \string\RandBox\space
has a height/depth <= 0pt (\the\ht#2.\the\dp#2).
Type x or e!}%
\fi\fi
\setbox#3\hbox{\vbox{%
\halign{##\cr#6\cr}\ifne{#6}\SEP\fi}}%
\MyNext}
\def\RandBox #1 font #2 [#3] (#4) {\leavevmode\hbox\bgroup
\ifdim#3<0pt
\def\K{{#2\kern-#3\kern\Randsep\relax}}%
\else
\def\K{{#2\kern\Randsep\relax}}%
\fi
\setbox20\hbox{\vbox{\K\hbox{\K{#1}\K}\K}}%
\topskip=0pt
\offinterlineskip
#2%
\def\ISEP{#3}%
\def\SEP{\kern\ISEP}%
\setbox0\hbox{#4}%
\let\MyNext\RBA
\def\\{\SEP}%
\hScanDef 4 5 6 }
\def\RBA (#1) {\setbox7\hbox{#1}%
\let\MyNext\RBB
\def\\{\cr\noalign{\SEP}}%
\vScanDef 8 9 10 }
\def\RBB {%
\let\MyNext\RBC
\def\\{\cr\noalign{\vskip\ISEP}}%
\vScanDef 11 12 13 }
\def\RBC (#1) {\setbox14\hbox{#1}%
\let\MyNext\RBD
\def\\{\SEP}%
\hScanDef 15 16 17 }
\def\RBD (#1){\setbox18\hbox{#1}%
% 4 5 6
\dimen0=\wd20
\advance\dimen0 by -\wd6
\setbox21\hbox{\unhbox4}%
\def\done{0}%
\loop
\ifdim\wd21<\dimen0
\setbox21\hbox{\unhbox21\copy5}%
\def\done{1}%
\repeat
\setbox21\hbox{\unhbox21%\if\done0\kern-\ISEP\fi
\copy6}%
% 15 16 17
\dimen0=\wd20
\advance\dimen0 by -\wd17
\setbox22\hbox{\unhbox15}%
\def\done{0}%
\loop
\ifdim\wd22<\dimen0
\setbox22\hbox{\unhbox22\copy16}%
\def\done{1}%
\repeat
\setbox22\hbox{\unhbox22%\if\done0\kern-\ISEP\fi
\copy17}%
% 8 9 10
\dimen0=\ht20 \advance\dimen0 by \dp20
\advance\dimen0 by -\ht10
\advance\dimen0 by -\dp10
\setbox23\vbox{\copy8}%
\def\done{0}%
\loop
\dimen1\ht23 \advance\dimen1 by \dp23
\ifdim\dimen1<\dimen0
\setbox23\vbox{\unvbox23\copy9}%
\def\done{1}%
\repeat
\setbox23\vbox{\unvbox23%\if\done0\kern-\ISEP\fi
\copy10}%
% 11 12 13
\dimen0=\ht20 \advance\dimen0 by \dp20
\advance\dimen0 by -\ht13
\advance\dimen0 by -\dp13
\setbox24\vbox{\copy11}%
\def\done{0}%
\loop
\dimen1\ht24 \advance\dimen1 by \dp24
\ifdim\dimen1<\dimen0
\setbox24\vbox{\unvbox24\copy12}%
\def\done{1}%
\repeat
\setbox24\vbox{\unvbox24%\if\done0\kern-\ISEP\fi
\copy13}%
%
\dimen0=\ht23 \advance\dimen0 by \dp23
\advance\dimen0 by \ISEP
\dimen1=\wd21
\advance\dimen1 by \ISEP
\hbox{$\vcenter{\copy0\SEP\copy23\copy14}%
\vcenter{\copy21
\hbox to \wd21{\hss
\vbox to \dimen0{\vss\copy20\vss}%
\hss}%
\copy22}%
\vcenter{\copy7\SEP\copy24\copy18}$}\egroup}
\def\EinfachRand #1 font #2 char #3 [#4] {%
\RandBox {#1} font {#2} [#4]
(#3) ([#3]) (#3)
([#3]) ([#3])
(#3) ([#3]) (#3) }
\def\countpluseins#1#2{\count#1=\count#2
\advance\count#1 by 1}
\def\LinienBox #1 font #2 ecken #3 linien #4 {
{\count100='#3 \count200='#4 % oktal!!!
\countpluseins{101}{100}
\countpluseins{102}{101}
\countpluseins{103}{102}
\countpluseins{201}{200}
\countpluseins{202}{201}
\countpluseins{203}{202}
\def\e##1{\char\the\count10##1}
\def\l##1{\char\the\count20##1}
\RandBox {#1} font {#2} [0pt]
(\e1) ([\l1]) (\e0)
([\l2]) ([\l0])
(\e2) ([\l3]) (\e3) }}
\def\C{\char'}
\def\MeanderBox #1 at #2 {%
{\font\MeanderFont=umranda at #2
\RandBox {#1} font {\MeanderFont} [0pt]
(\C136) ([\C137]) (\C140)
([\C145]) ([\C141])
(\C144) ([\C143]) (\C142) }}
\endinput
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