\subsection{Create and initialize a curve/surface direction instance.}
\funclabel{newdir}
\begin{minipg1}
Create and initialize a curve/surface direction instance.
\end{minipg1} \\ \\
SYNOPSIS\\
        \>SISLdir *newdir(\begin{minipg3}
          {\fov idim})
        \end{minipg3}\\[0.3ex]
        \>\>    int \> {\fov idim};\\
\\
ARGUMENTS\\
        \>Input Arguments:\\
        \>\>    {\fov idim}\> - \>
        \begin{minipg2}
          Dimension of the space in which the object lies.
        \end{minipg2}\\
\\
        \>Output Arguments:\\
        \>\>    {\fov newdir}\> - \>
        \begin{minipg2}
          Pointer to new direction structure. If it is
          impossible to allocate space for the structure,
          newdir will return a NULL value.
        \end{minipg2}\\
\\
EXAMPLE OF USE\\
        \>      \{ \\
        \>\>int     \> {\fov idim};\\
        \>\>SISLdir \> *{\fov dir};\\
        \>\>    \ldots \\
        \>\>{\fov dir} = newdir(\begin{minipg4}
          {\fov idim});
        \end{minipg4}\\
        \>\>    \ldots \\
        \>      \}
\end{tabbing}
