he vector difference should be computed. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A reference to this two-dimensional vector. </dd></dl>
<div class="fragment"><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;                                                  {</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  <a class="code" href="classRVO_1_1Vector2.html#a82870808378b1ee7268703ed49371ad9">x_</a> -= vec