\par
\section{Data Structure}
\label{section:Drand:dataStructure}
\par
The {\tt Drand} object has nine fields.
\begin{itemize}
\item 
{\tt double seed1} : first seed
\item 
{\tt double seed2} : second seed
\item 
{\tt double base1} : first base
\item 
{\tt double base2} : second base
\item 
{\tt double lower} : lower bound for a uniform distribution
\item 
{\tt double upper} : upper bound for a uniform distribution
\item 
{\tt double mean} : mean for a normal distribution
\item 
{\tt double sigma} : variation for a normal distribution
\item 
{\tt int mode}: 
mode of the object, uniform is {\tt 1}, normal is {\tt 2}
\end{itemize}
