+Figure \ref{gpufloats.pdf} shows a comparison between the renderering of a circle performed by an x86-64 (CPU) and several GPUs in the IPDF software.
+
+\section{Coordinate Systems and Transformations} \label{Coordinate Systems and Transformations}
+\input{chapters/Background/CoordinateSystems}
+
+
+\section{Interactivity and Obtaining Results}
+
+There are two basic ways to control the IPDF software; manually through use of keyboard and mouse and a Qt4 \cite{Qt4} based control panel, or automatically by reading a script containing a sequence of commands to transform the view or insert test SVGs. More complex control can be obtained by using the Python \texttt{subprocess} module to produce the commands and analyse performance results.
+
+All results presented in Chapter \ref{Results and Discussion} were obtained on a conventional Debian GNU/Linux laptop with an AMD/ATI Radeon series GPU. An attempt was made to cross compile the software for the Windows operating system, but at the time of publication there were difficulties with the Windows 7 OpenGL drivers on the author's system.
+
+\begin{figure}[H]
+ \centering
+ \includegraphics[width=0.3\textwidth]{figures/controlpanel_screenshot.png}
+ \caption{The Qt4 Control Panel provides basic interactivity} \label{controlpanel_screenshot.png}
+\end{figure}
+
+
+\section{Version Control}
+
+The Git version control system was used to collaborate and back up work on this project; the main repository may be viewed at \url{http://git.ucc.asn.au/?p=ipdf/code.git} or on Github at \url{http://github.com/szmoore/ipdf-code}.
+
+\begin{figure}[H]
+ \centering
+ \includegraphics[width=\textwidth]{figures/github.png}
+ \caption{Commit statistics from the repository at Github (this author is ``szmoore'')} \label{github.png}
+\end{figure}