dinates to be mapped. </td></tr>
    <tr><td class="paramname">model</td><td>Specifies the modelview matrix </td></tr>
    <tr><td class="paramname">proj</td><td>Specifies the projection matrix </td></tr>
    <tr><td class="paramname">viewport</td><td>Specifies the viewport </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns the computed object coordinates. </dd></dl>
<dl class="tparams"><dt>Template Parameters</dt><dd>
  <table class="tparams">
    <tr><td c