me="l00010"></a><span class="lineno">   10</span>{</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span>    PP = 0,  <span class="comment">// point-point, the shortest distance is the distance between the two points</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span>};</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span clas