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

<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void pltnrm_c ( ConstSpiceDouble    v1[3],
                   ConstSpiceDouble    v2[3],
                   ConstSpiceDouble    v3[3],
                   SpiceDouble         normal[3] ) 
</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Compute an outward normal vector of a triangular plate. 
   The vector does not necessarily have unit length. 
 