Procedure

   SpiceBoolean wnelmd_c ( SpiceDouble    point,
                           SpiceCell    * window ) 

Abstract

 
   Determine whether a point is an element of a double precision 
   window. 
 

Required_Reading

 
   WINDOWS 
 

Keywords

 
   WINDOWS 
 

Brief_I/O

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   point      I   Input point. 
   window     I   Input window. 

   The function returns SPICETRUE if point is an element of window. 
 

Detailed_Input

   point       is a point, which may or may not be contained in 
               one of the intervals in window. 

   window      is a CSPICE window containing zero or more intervals. 

               window must be declared as a double precision SpiceCell.
 

Detailed_Output

 
   The function returns SPICETRUE if the input point is an element of 
   the input window---that is, if 

      a(i)  <  point  <  b(i) 
            -         - 

   for some interval [ a(i), b(i) ] in window---and returns SPICEFALSE 
   otherwise. 
 

Parameters

 
   None. 
 

Exceptions

  
   1) If the input window does not have double precision type,
      the error SPICE(TYPEMISMATCH) is signaled.
 

Files

 
   None. 
 

Particulars

 
   None. 
 

Examples

 
   Let a contain the intervals 

      [ 1, 3 ]  [ 7, 11 ]  [ 23, 27 ] 

   Then the following expressions take the value SPICETRUE

      wnelmd_c ( 1.0, &window );
      wnelmd_c ( 9.0, &window );

   and the following expressions take the value SPICEFALSE

      wnelmd_c (  0.0, &window );
      wnelmd_c ( 13.0, &window );
      wnelmd_c ( 29.0, &window );

Restrictions

 
   None. 
 

Literature_References

 
   None. 
 

Author_and_Institution

 
   N.J. Bachman    (JPL)
   H.A. Neilan     (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 

Version

 
   -CSPICE Version 1.0.0, 29-JUL-2002 (NJB) (HAN) (WLT) (IMU)

Index_Entries

 
   element of a d.p. window 
 

Link to routine wnelmd_c source file wnelmd_c.c