_PT2T0 = 5,  <span class="comment">// point-triangle, the closest point is on the edge (t2, t0)</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>    PT       = 6,  <span class="comment">// point-triangle, the closest point is on the triangle</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>};</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span> </div>
<div class="line"><a id=