 </span>
<a name="l00072"></a>00072 <span class="comment">        This function will return a lists which will contains all atoms and vertices </span>
<a name="l00073"></a>00073 <span class="comment">        sorted on x axis.</span>
<a name="l00074"></a>00074 <span class="comment">        First, we merge atom and vertice lists into those a single list. Then they </span>
<a name="l00075"></a>00075 <span class="comment">        will be sorted using a quickSort algorithm, using the x positions of vertices</spa