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<p class=MsoNormal><i><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>Hello vtk world,<o:p></o:p></span></i></p>
<p class=MsoNormal><i><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'><o:p> </o:p></span></i></p>
<p class=MsoNormal><i><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>Basically, what I'm currently trying to do is to cut a
vtkPolyData in two, using a loop of points. I'm using<o:p></o:p></span></i></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
color:#040004'>vtkImplicitSelectionLoop to create the loop, and vtkClipPolyData
to cut the vtkPolyData throughout the loop, which consists of a set of Points.
For simplicity, the point's Id have been selected using paraView, <o:p></o:p></span></p>
<pre><span lang=EN-US style='color:#040004'>that shouldn't be the problem. The problem is that the </span><span
lang=EN-US style='color:#040004'>output tends to be something like " a big crescent shape chopped out of the 3D model or a whole bunch of tiny, irregularly shaped holes." As it has been mentioned in a previous mail touching the same subject, but there is no answer to this thread. ([vtkusers] Cutting a hole in polydata)<o:p></o:p></span></pre><pre><span
lang=EN-US style='color:#040004'>I also tried to cut it using vtkExtractPolyDataGeometry (also using the same implicitLoop), and the results were different, but still they weren't what I expected.<o:p></o:p></span></pre><pre><span
lang=EN-US style='color:#040004'><o:p> </o:p></span></pre><pre><span
lang=EN-US style='color:#040004'>here goes the code:<o:p></o:p></span></pre><pre><span
lang=EN-US style='color:#040004'><o:p> </o:p></span></pre>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>vtkSmartPointer</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><<span
style='color:#040004'>vtkImplicitSelectionLoop</span>> <span
style='color:#040004'>loop</span> = <span style='color:#040004'>vtkImplicitSelectionLoop</span>::<span
style='color:#040004'>New</span>();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:green'>// The following
points have been selected using ParaView from the aneurysm_with_vessels
polyData<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:blue'>int</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'> <span
style='color:#040004'>myints</span>[] = {5275,
4761,4520,4591,3314,1381,1037,718,574,905,2512,4099,4854,5521,5286,5274 };<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>vector</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><<span
style='color:blue'>int</span>> <span style='color:#040004'>ids</span> (<span
style='color:#040004'>myints</span>, <span style='color:#040004'>myints</span>
+ <span style='color:blue'>sizeof</span>(<span style='color:#040004'>myints</span>)
/ <span style='color:blue'>sizeof</span>(<span style='color:blue'>int</span>)
);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>vtkSmartPointer</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><<span
style='color:#040004'>vtkPoints</span> > <span style='color:#040004'>paraViewPoints</span>
= <span style='color:#040004'>vtkPoints</span>::<span style='color:#040004'>New</span>();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:blue'>for</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>( <span
style='color:blue'>int</span> <span style='color:#040004'>i</span> = 0; <span
style='color:#040004'>i</span> < <span style='color:#040004'>ids</span>.<span
style='color:#040004'>size</span>(); <span style='color:#040004'>i</span>++ )<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>{<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'> <span
style='color:#040004'>paraViewPoints</span>-><span style='color:#040004'>InsertPoint</span>(<span
style='color:#040004'>i</span>,<span style='color:#040004'>inputMesh</span>-><span
style='color:#040004'>GetPoint</span>(<span style='color:#040004'>ids</span>.<span
style='color:#040004'>at</span>(<span style='color:#040004'>i</span>)));<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>}<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>loop</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>-><span
style='color:#040004'>SetLoop</span>(<span style='color:#040004'>paraViewPoints</span>);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:green'>//clip polygonal
data with user-specified implicit function </span><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>vtkSmartPointer</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><<span
style='color:#040004'>vtkClipPolyData</span>> <span style='color:#040004'>clipper</span>
= <span style='color:#040004'>vtkClipPolyData</span>::<span style='color:#040004'>New</span>();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>clipper</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>-><span
style='color:#040004'>SetInput</span>(<span style='color:#040004'>inputMesh</span>);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>clipper</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>-><span
style='color:#040004'>SetClipFunction</span>( <span style='color:#040004'>loop</span>
);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:#040004'>clipper</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>-><span
style='color:#040004'>Update</span>();<o:p></o:p></span></p>
<pre><span lang=EN-US style='color:#040004'>vtkPolyData</span><span lang=EN-US>* <span
style='color:#040004'>clippedOutput</span> = <span style='color:#040004'>clipper</span>-><span
style='color:#040004'>GetOutput</span>();<o:p></o:p></span></pre><pre><span
lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Thanks in advance!<o:p></o:p></span></pre><pre><span
lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Regards,<o:p></o:p></span></pre><pre><span
lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Martin.</span><span
lang=EN-US style='color:#040004'><o:p></o:p></span></pre><pre><i><span
lang=EN-US><o:p> </o:p></span></i></pre>
<p class=MsoNormal><i><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'><o:p> </o:p></span></i></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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