ex_Entries<br></a>
             </small>
            </td>
          </tr>
        </tbody>
</table>

<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void pl2nvc_c ( ConstSpicePlane   * plane,
                   SpiceDouble         normal[3],
                   SpiceDouble       * constant  ) 
</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Return a unit normal vector and constant that define a specified 
   plane. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   <