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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
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tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/latex/contrib/treesvr/treedoc.tex
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+\documentclass{article}
+\usepackage{trees}
+\usepackage{a4}
+
+\title{{\tt trees.sty}: A Macro for Drawing Binary \\
+ or Ternary Trees}
+
+\author{Peter Vanroose \\
+ Peter.Vanroose@esat.kuleuven.ac.be}
+\date{18 april 1990}
+
+\begin{document}
+
+\maketitle
+
+The following macros let you draw a (binary or ternary) tree of any size.
+For each "internal node", you only have to specify which are the descending
+nodes, with a \verb|\branch| command (\verb|\tbranch| for ternary node.).
+To this end, nodes are given a label (only used internally!). These macros
+will give you some ideas on designing similar things for, e.g.,
+digital circuits.
+
+Trees are constructed with labels on the branches (default 0 and 1), and
+with text (e.g., its name or value) on the nodes. The first parameter to
+\verb|\branch| (0, 1, 2 or 3) determines the steepness of the branches.
+
+Example:
+\small
+\begin{verbatim}
+\begin{picture}(100,100)(-50,10)
+\unitlength=2mm
+\branchlabels ABC % 012 is the default
+\root(2,10) 0. % root at absolute coordinate (2,10)
+ % its (internally used) label is 0
+ % the space before the 0 is obligatory
+\branch2{16} 0:1,2. % node 0 (i.e., the root) has children 1 and 2
+ % the text "1.00" is written above it
+ % space is optional, :,. are obligatory
+ \leaf{4}{$u_1$} 1. % node 1 is a leaf
+ % "0.45" written above, "$u_1$" to the right
+ \branch2{12} 2:3,7. % branch to node 3 goes up, and has label A
+ \tbranch2{9} 3:4,5,6.
+ \leaf{4}{$u_3$}4. % the symbols 0--7 can be replaced by anything
+ \leaf{3}{$u_4$}5.
+ \leaf{2}{$u_5$}6.
+ \leaf{3}{$u_2$} 7.
+\end{picture}
+\end{verbatim}
+\normalsize
+will typeset something like:
+\begin{flushleft}
+\begin{picture}(100,100)(-50,10)
+\unitlength=2mm
+\branchlabels ABC
+\root(2,10) 0.
+\branch2{16} 0:1,2.
+ \leaf{4}{$u_1$} 1.
+ \branch2{12} 2:3,7.
+ \tbranch2{9} 3:4,5,6.
+ \leaf{4}{$u_3$}4.
+ \leaf{3}{$u_4$}5.
+ \leaf{2}{$u_5$}6.
+ \leaf{3}{$u_2$} 7.
+\end{picture}
+\end{flushleft}
+\end{document}