t the edge b</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>    PP_Ea1Eb0 = 3,  <span class="comment">// point-point, the shortest distance is the distance between the point 1 in edge a and the point 0 in edge b</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>    PP_Ea1Eb1 = 4,  <span class="comment">// point-point, the shortest distance is the distance between the point 1 in edge a and the point 1 in edge b</