        <span style="font-weight: bold;">vertex1</span>() </td>
            <td>Returns the pointer to the
end point of the edge.<br>
If the edge is infinite in that direction returns NULL. </td>
          </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">const
voronoi_vertex_type* <span style="font-weight: bold;">vertex1</span>()
const </td>
            <td>Returns the const pointer
to the end point of the edge.<br>
If the edge is infinite in that direction returns NU