tic implementation.  


   1) Look up all the vertices associated with each plate 
      of the model contained in a specified type 2 segment. For each 
      plate, display the plate's vertices and normal vector. 
 
      For this example, we'll show the context of this look-up: 
      opening the DSK file for read access, traversing a trivial, 
      one-segment list to obtain the segment of interest. 
 
      Example code begins here. 
 
 
         #include &lt;stdio.h&gt;
         #include &quot;SpiceUs