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\subsection{Draw constant parameter lines in a surface
using piecewise straight lines.}
\funclabel{s1237}
\begin{minipg1}
Draw constant parameter lines in a surface.
The distance between the surface and the
straight lines is less than a tolerance epsge. Also see NOTE!
\end{minipg1} \\ \\
SYNOPSIS\\
\>void s1237(\begin{minipg3}
{\fov surf}, {\fov numline1}, {\fov numline2}, {\fov epsge}, {\fov stat})
\end{minipg3}\\[0.3ex]
\>\> SISLSurf \> *{\fov surf};\\
\>\> int \> {\fov numline1};\\
\>\> int \> {\fov numline2};\\
\>\> double \> {\fov epsge};\\
\>\> int \> *{\fov stat};\\
\\
ARGUMENTS\\
\>Input Arguments:\\
\>\> {\fov surf}\> - \> \begin{minipg2}
Pointer to the surface.
\end{minipg2}\\
\>\> {\fov numline1}\> - \> \begin{minipg2}
Number of constant parameter lines to be drawn in the first
parameter direction.
\end{minipg2}\\[0.3ex]
\>\> {\fov numline2}\> - \> \begin{minipg2}
Number of constant parameter lines to be drawn in the
second parameter direction.
\end{minipg2}\\[0.3ex]
\>\> {\fov epsge}\> - \> \begin{minipg2}
The maximal distance allowed between the drawn curves
and the surface.
\end{minipg2} \\[0.8ex]
\\
\>Output Arguments:\\
\>\> {\fov stat} \> - \> Status messages\\
\>\>\>\>\> $> 0$ : warning\\
\>\>\>\>\> $= 0$ : ok\\
\>\>\>\>\> $< 0$ : error\\
\\
NOTE\\
\>\begin{minipg6}
This function calls s6drawseq() which
is device dependent. Before using the function make sure
you have a version of s6drawseq()
interfaced to your graphic package.
More about s6drawseq() on page~\pageref{s6drawseq}.
\end{minipg6}
\newpagetabs
EXAMPLE OF USE\\
\> \{ \\
\>\> SISLSurf \> *{\fov surf};\\
\>\> int \> {\fov numline1};\\
\>\> int \> {\fov numline2};\\
\>\> double \> {\fov epsge};\\
\>\> int \> {\fov stat};\\
\>\> \ldots \\
\>\>s1237(\begin{minipg4}
{\fov surf}, {\fov numline1}, {\fov numline2}, {\fov epsge}, \&{\fov stat});
\end{minipg4}\\
\>\> \ldots \\
\> \}
\end{tabbing}
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