init commit

main.tex

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+\documentclass[11pt]{article}
+
+\input{util/packages}
+\input{util/tikz}
+
+\begin{document}
+\begin{stochasticModel}[2.5cm]
+\node[state] (a)                    {$a$};
+\node[state] (b) [above right of=a] {$b$};
+\node[state] (c) [below right of=a] {$c$};
+
+
+\node[dist]  (a_alpha) [right of=a, xshift=-1.6cm] {};
+\path[] (a) edge [action] node {$\alpha$} (a_alpha)
+        (a_alpha) edge [transition,sloped,below] node {$0.2$} (b)
+        (a_alpha) edge [transition] node {$0.8$} (c);
+
+\node[dist]  (b_alpha) [right of=b, xshift=-1.5cm] {};
+\path[] (b) edge [action] node {$\alpha$} (b_alpha)
+        (b_alpha) edge [transition,sloped,above,bend right=100,pos=0.35] node {$0.2$} (a)
+        (b_alpha) edge [transition,below,pos=0.1,in=-110, out=-70,looseness=2] node[rotate=180] {$0.8$} (c);
+
+\end{stochasticModel}
+
+\end{document}

util/packages.tex

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+\usepackage[ngerman,english]{babel}
+\usepackage[utf8]{inputenc}
+\usepackage{geometry}
+\usepackage{tikz}
+\usetikzlibrary{automata, positioning, arrows}
+\usepackage{environ}
+

util/tikz.tex

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+\NewEnviron{stochasticModel}[1][1.5cm]{%
+  \begin{tikzpicture}[node distance=#1,
+                      thick,
+                      action/.style={-,draw,sloped,above,pos=0.45},
+                      transition/.style={->,draw,sloped,above,pos=0.5},
+                      state/.style={circle,draw,minimum size=20pt},
+                      dist/.style={circle,draw=black,fill=black,minimum size=4pt,inner sep=0pt}]
+          \BODY
+  \end{tikzpicture}
+}