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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> Should the 4 in the i loop be 6 because the Face has 6 nodes, not 4.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
vtkQuadraticTetra::IntersectWithLine(</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">*
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">p1</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">*
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">p2</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">tol</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">&
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">t</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">*
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">x</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">*
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">pcoords</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">&
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">subId</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">{<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> intersection=0;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> tTemp;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">double</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> pc[3], xTemp[3];<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> faceNum;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">t</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> = VTK_DOUBLE_MAX;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">for</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> (faceNum=0; faceNum<4; faceNum++)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">for</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> (</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
i=0; i<4; i++)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">this</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">->Face->Points->SetPoint(i,</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">this</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">->Points->GetPoint(TetraFaces[faceNum][i]));<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> }</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black">……<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt"><span style="font-size:9.5pt;font-family:Consolas;color:black">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black">Jeff</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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