\subsection{Generation}
\begin{figure}
+\centering
\includegraphics[width=14cm]{generate}
\caption[Generation Class Diagram]{Class diagram of components involved in generation of a topology.}
\end{figure}
\subsection{Simulation}
\begin{figure}
+\centering
\includegraphics[width=14cm]{simulation}
\caption[Simulation Class Diagram]{Class diagram of components created for simulation. Classes shaded in dark blue are standard as part of ns3. Classes shaded in light blue are shipped with ns3 but have been heavily modified. Classes in white are new.}
\end{figure}
\subsection{Analysis}
\begin{figure}
+\centering
\includegraphics[width=14cm]{analysis}
\caption[Analysis Class Diagram]{Class diagram showing components involved in analysis of a simulation.}
\end{figure}