tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">vec&lt; 4, U, Q &gt; const &amp;&#160;</td>
          <td class="paramname"><em>viewport</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Map the specified window coordinates (win.x, win.y, win.z) into object coordinates using default near and far clip planes definition. </p>
<p>