</tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">void
            <span style="font-weight: bold;">twin</span>(voronoi_edge_type*
e) </td>
            <td>Sets the twin edge pointer
of the edge. </td>
          </tr>
          <tr>
            <td style="font-family: Courier New,Courier,monospace;">voronoi_edge_type*
            <span style="font-weight: bold;">next</span>() </td>
            <td>Returns the pointer to the
CCW next edge within the corresponding Vorono