span>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real (c_double), intent(in)</td>          <td class="paramname"><span class="paramname"><em>rx0</em></span>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real (c_double), intent(in)</td>          <td class="paramname"><span class="paramname"><em>ry0</em></span>, </td>
        </tr>
        <tr>
          