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   dskb02_c ( DSK, fetch type 2 bookkeeping data ) 

   void dskb02_c ( SpiceInt               handle,
                   ConstSpiceDLADescr   * dladsc,
                   SpiceInt             * nv,
                   SpiceInt             * np,
                   SpiceInt             * nvxtot,
                   SpiceDouble            vtxbds  [3][2],
                   SpiceDouble          * voxsiz,
                   SpiceDouble            voxori  [3],
                   SpiceInt               vgrext  [3],
                   SpiceInt             * cgscal,
                   SpiceInt             * vtxnpl,
                   SpiceInt             * voxnpt,
                   SpiceInt             * voxnpl          )


   Return bookkeeping data from a DSK type 2 segment.






   --------  ---  --------------------------------------------------
   handle     I   DSK file handle.
   dladsc     I   DLA descriptor.
   nv         O   Number of vertices in model.
   np         O   Number of plates in model.
   nvxtot     O   Number of voxels in fine grid.
   vtxbds     O   Vertex bounds.
   voxsiz     O   Fine voxel edge length.
   voxori     O   Fine voxel grid origin.
   vgrext     O   Fine voxel grid extent.
   cgscal     O   Coarse voxel grid scale.
   vtxnpl     O   Size of vertex-plate correspondence list.
   voxnpt     O   Size of voxel-plate pointer list.
   voxnpl     O   Size of voxel-plate correspondence list.


   handle      is the handle of a DSK file containing a type 2
               segment from which data are to be fetched.

   dladsc      is the DLA descriptor associated with the segment
               from which data are to be fetched.


   nv          is the number of vertices in model.

   np          is the number of plates in model.

   nvxtot      is the total number of voxels in fine grid.

   vtxbds      are the vertex bounds. This is an array of six values giving
               the minimum and maximum values of each component of
               the vertex set. `vtxbds' has dimensions [3][2].
               Units are km.

   voxsiz      is the fine grid voxel size. DSK voxels are cubes; the
               edge length of each cube is given by the voxel size.
               This size applies to the fine voxel grid. Units are km.

   voxori      is the voxel grid origin. This is the location of the
               voxel grid origin in the body-fixed frame associated
               with the target body. Units are km.

   vgrext      is the voxel grid extent. This extent is an array of
               three integers indicating the number of voxels in the
               X, Y, and Z directions in the fine voxel grid.

   cgscal      is the coarse voxel grid scale. The extent of the fine
               voxel grid is related to the extent of the coarse voxel
               grid by this scale factor.

   vtxnpl      is the vertex-plate correspondence list size.

   voxnpt      is the size of the voxel-to-plate pointer list.

   voxnpl      is the voxel-plate correspondence list size.


   See the header file


   for declarations of DLA descriptor sizes and documentation of the
   contents of DLA descriptors.

   See the header file


   for declarations of DSK descriptor sizes and documentation of the
   contents of DSK descriptors.

   See the header file


   for declarations of DSK data type 2 (plate model) parameters.


   1)  If the input handle is invalid, an error is signaled by a
       routine in the call tree of this routine.

   2)  If a file read error occurs, the error is signaled by a
       routine in the call tree of this routine.

   3)  If the input DLA descriptor is invalid, the effect of this
       routine is undefined. The error *may* be diagnosed by
       routines in the call tree of this routine, but there are no


   See input argument `handle'.


   This routine supports computations involving bookkeeping information
   stored in DSK type 2 segments. User applications typically will not
   need to call this routine.

   DSK files are built using the DLA low-level format and the DAS
   architecture; DLA files are a specialized type of DAS file in which
   data are organized as a doubly linked list of segments. Each
   segment's data belong to contiguous components of character, double
   precision, and integer type.


   The numerical results shown for this example may differ across
   platforms. The results depend on the SPICE kernels used as
   input, the compiler and supporting libraries, and the machine
   specific arithmetic implementation.

   1) Dump several parameters from the first DLA segment of
      a DSK file. The segment is assumed to be of type 2.

      Example code begins here.

         Program dskb02_ex1
      #include <stdio.h>
      #include "SpiceUsr.h"

      int main()
         #define FILSIZ          256

         Local variables
         SpiceBoolean            found;

         SpiceChar               dsk  [ FILSIZ ];

         SpiceDLADescr           dladsc;

         SpiceDouble             voxori [3];
         SpiceDouble             voxsiz;
         SpiceDouble             vtxbds [3][2];

         SpiceInt                cgscal;
         SpiceInt                handle;
         SpiceInt                np;
         SpiceInt                nv;
         SpiceInt                nvxtot;
         SpiceInt                vgrext [3];
         SpiceInt                voxnpl;
         SpiceInt                voxnpt;
         SpiceInt                vtxnpl;

         Prompt for the name of DSK to read.
         prompt_c ( "Enter DSK name > ", FILSIZ, dsk );

         Open the DSK file for read access. We use the
         DAS-level interface for this function.
         dasopr_c ( dsk, &handle );

         Begin a forward search through the kernel. In
         this example, it's a very short search.
         dlabfs_c ( handle, &dladsc, &found );

         if ( !found )
            setmsg_c ( "No segment found in file #." );
            errch_c  ( "#",  dsk                     );
            sigerr_c ( "SPICE(NOSEGMENT)"            );

         If we made it this far, DLADSC is the
         DLA descriptor of the first segment.
         Read and display type 2 bookkeeping data.
         dskb02_c ( handle,  &dladsc, &nv,    &np,    &nvxtot,
                    vtxbds,  &voxsiz, voxori, vgrext, &cgscal,
                    &vtxnpl, &voxnpt, &voxnpl                 );

         printf ( "\n"
                  "Number of vertices:                 %d\n"
                  "Number of plates:                   %d\n"
                  "Number of voxels:                   %d\n",
                  (int)nvxtot                                       );

         printf ( "Vertex bounds in X direction (km):  %f : %f\n"
                  "Vertex bounds in Y direction (km):  %f : %f\n"
                  "Vertex bounds in Z direction (km):  %f : %f\n",
                  vtxbds[0][0], vtxbds[0][1],
                  vtxbds[1][0], vtxbds[1][1],
                  vtxbds[2][0], vtxbds[2][1]                        );

         printf ( "Voxel edge length (km):             %f\n"
                  "Voxel grid origin (km):           ( %f %f %f )\n"
                  "Voxel grid extents:                 %d %d %d\n"
                  "Coarse voxel grid scale:            %d\n"
                  "Size of vertex-plate list:          %d\n"
                  "Size of voxel-plate pointer array:  %d\n"
                  "Size of voxel-plate list:           %d\n",
                  voxori[0], voxori[1], voxori[2],
                  (int)vgrext[0], (int)vgrext[1], (int)vgrext[2],
                  (int)voxnpl                                       );

         Close the kernel. This isn't necessary in a stand-
         alone program, but it's good practice in subroutines
         because it frees program and system resources.
         dascls_c ( handle );

         return ( 0 );

      When this program was executed on a Mac/Intel/cc/64-bit
      platform, using the DSK file named phobos512.bds,
      the output was:

      Enter DSK name > phobos512.bds

      Number of vertices:                 1579014
      Number of plates:                   3145728
      Number of voxels:                   11914500
      Vertex bounds in X direction (km):  -13.440030 : 12.762800
      Vertex bounds in Y direction (km):  -11.520650 : 12.061140
      Vertex bounds in Z direction (km):  -9.570780 : 10.055000
      Voxel edge length (km):             0.104248
      Voxel grid origin (km):           ( -14.073520 -11.988554 -9.903588 )
      Voxel grid extents:                 260 235 195
      Coarse voxel grid scale:            5
      Size of vertex-plate list:          11010050
      Size of voxel-plate pointer array:  1151500
      Size of voxel-plate list:           6419540


   1)  The caller must verify that the segment associated with
       the input DLA descriptor is a DSK type 2 segment.




   N.J. Bachman        (JPL)
   J. Diaz del Rio     (ODC Space)


   -CSPICE Version 2.1.1, 08-FEB-2021 (JDR)

       Edited the header to comply with NAIF standard. Removed unnecessary
       include statements from example code.

       Updated example code to split printf statement in three in order to
       comply with ANSI-C maximum string literal of length.

   -CSPICE Version 2.1.0, 11-JUL-2016 (NJB)

       Edit to example program to use "%d" with explicit casts
       to int for printing SpiceInts with printf.

       Removed unnecessary include statements. Updated

       Based on:

       DSKLIB_C Version 2.0.1, 11-JUL-2014 (NJB)

          Added example program to header.

       DSKLIB_C Version 2.0.0, 13-MAY-2010 (NJB)

          Updated for compatibility with new DSK type 2 design.
          Name has been changed from dskp02_c to dskb02_c.

       DSKLIB_C Version 1.0.0, 11-FEB-2010 (NJB)


   fetch parameters from a type 2 DSK segment
Fri Dec 31 18:41:04 2021