/a>&lt; T &gt;&#160;</td>
          <td class="paramname"><em>V</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">

<p>Return the vector normalized to have unit norm (do nothing if the vector is 0). </p>
<p >Use fast_invsqrt() approximation to speedup computations.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
  <table class="tpa