ass="line"><a id="l00500" name="l00500"></a><span class="lineno">  500</span>                    <span class="comment">// if new_buffer is allocated, we need to copy the old data</span></div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno">  501</span>                    Offset3D offset_begin{begin[2], begin[1], begin[0]};</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno">  502</span>                    Offset3D offset_end{end[2], end[1], end[0]};</div>
<d