Procedure

   void frinfo_c ( SpiceInt       frcode,
                   SpiceInt      *cent,
                   SpiceInt      *frclss,
                   SpiceInt      *clssid,
                   SpiceBoolean  *found   )

Abstract

 
   Retrieve the minimal attributes associated with a frame 
   needed for converting transformations to and from it. 
 

Required_Reading

 
   None. 
 

Keywords

 
   FRAMES 
 

Brief_I/O

 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   frcode     I   the idcode for some frame 
   cent       O   the center of the frame 
   frclss     O   the class (type) of the frame 
   clssid     O   the idcode for the frame within its class. 
   found      O   SPICETRUE if the requested information is available. 
 

Detailed_Input

 
   frcode      is the ID code for some reference frame. 
 

Detailed_Output

 
   cent        is the body ID code for the center of the reference 
               frame (if such an ID code is appropriate). 
 
   frclss      is the class or type of the frame.  This identifies 
               which subsystem will be used to perform frame 
               transformations. 
 
   clssid      is the ID-code used for the frame within its class. 
               This may be different from the frame ID-code. 
 
   found       is SPICETRUE if cent, frclss and frcode are available. 
               Otherwise, found is returned with the value SPICEFALSE. 
 

Parameters

 
   None. 
 

Exceptions

 
   None. 
 

Files

 
   None. 
 

Particulars

 
   This is a low level routine needed by state transformation 
   software to transform states and attitudes between different 
   reference frames. 
 
   The routine first examines local "hard-coded" information about 
   reference frames to see if the requested frame belongs to this 
   set.  If it does that information is returned. 
 
   If the requested information is not stored locally, the routine 
   then examines the kernel pool to see if the requested information 
   is stored there.  If it is and has the expected format, the data 
   is retrieved and returned. 
 

Examples

 
   Suppose that you needed to determine the center of some 
   reference frame.  The following code fragment illustrates 
   how to use this routine to determine this information. 
 
      frinfo_c ( frcode, &cent, &frclss, &clssid, &found ); 
 
      if ( found ) 
      {
         printf ( "The center of reference frame %\n"
                  "has body ID code: %d\n",
                  frcode, 
                  cent                               );
      }
      else
      {
         printf ( "There is insufficient data for frame %s\n", frcode ); 
      }

 

Restrictions

 
   None. 
 

Literature_References

 
    None. 
 

Author_and_Institution

 
    N.J. Bachman    (JPL)
    W.L. Taber      (JPL) 
 

Version

    -CSPICE Version 1.2.0, 22-JUL-1999 (NJB)  
 
        Now uses logical local variable for found flag.
        
    -CSPICE Version 1.1.0, 16-MAY-1999 (NJB)  
 
        Changed name of argument "class" to frclss for C++  
        compatibility.
 
    -CSPICE Version 1.0.0, 21-JUN-1998 (NJB) (WLT)
 
        Based on SPICELIB Version 3.0.0, 03-JUN-1997 (WLT)
 

Index_Entries

 
      Fetch reference frame attributes
 

Link to routine frinfo_c source file frinfo_c.c