(half-edges) in the Voronoi diagram. </td>
          </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">size_t
            <span style="font-weight: bold;">num_vertices</span>()
const </td>
            <td>Returns the number of the
Voronoi vertices in the Voronoi diagram. </td>
          </tr>
        </tbody>
      </table>
      <h2>Member Types</h2>
      <table style="text-align: left; width: 100%;" border="1"
 cellpadding="2" cellspacing="2">
        <tbody>
      