<div dir="ltr">Dave,<div>There are many points that are not part of any cell. They have a large value (0, 3.69e+19, -5.2e+27) or they are nan.</div><div>Here is a script that writes a poly data with all the points that are part of any cell. You can load that in ParaView and see the range of values. </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 25, 2016 at 9:51 AM, David Edmunds <span dir="ltr"><<a href="mailto:David.Edmunds@icr.ac.uk" target="_blank">David.Edmunds@icr.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hi,<div><br></div><div>Sorry for the late reply but I couldn’t send attachments to the mailing list. My input file can be found at <a href="http://www.filedropper.com/organbody" target="_blank">http://www.filedropper.com/organbody</a>.</div><div><br></div><div>Kind regards,</div><div><br></div><div>Dave</div><div><div class="h5"><div><br><div><div>On 23 May 2016, at 18:20, Dan Lipsa <<a href="mailto:dan.lipsa@kitware.com" target="_blank">dan.lipsa@kitware.com</a>> wrote:</div><br><blockquote type="cite"><div dir="ltr">I see,<div>Well, in this case, you may have points that are not part of any cells. Can you share your data file?</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 23, 2016 at 12:16 PM, David Edmunds <span dir="ltr"><<a href="mailto:David.Edmunds@icr.ac.uk" target="_blank">David.Edmunds@icr.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hi Dan,<div><br></div><div>Thanks, but I actually get a much smaller number when I count all the points from cells. Also, in my input dataset the cells are disjoint, i.e. no points are shared between multiple cells.</div><div><br></div><div>Kind regards,</div><div><br></div><div>Dave</div><div><div><div><br></div><div><div><div>On 23 May 2016, at 16:51, Dan Lipsa <<a href="mailto:dan.lipsa@kitware.com" target="_blank">dan.lipsa@kitware.com</a>> wrote:</div><br><blockquote type="cite"><div dir="ltr">Hi David,<div>You have shared points between cells so it is normal you'll get a bigger number when you count all the points from cells.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 23, 2016 at 10:01 AM, David Edmunds <span dir="ltr"><<a href="mailto:David.Edmunds@icr.ac.uk" target="_blank">David.Edmunds@icr.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
I am traversing a vtkPolyData object which is read in from a file using vtkXMLPolyDataReader. I access the number of points in the vtkPolyData in two different ways, here is my source code:<br>
<br>
vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New();<br>
reader->SetFileName("/Users/dedmunds/Desktop/organ_Body.vtp");<br>
reader->Update();<br>
vtkSmartPointer<vtkPolyData> poly_data = reader->GetOutput();<br>
<br>
cout << "Number of points: " << poly_data->GetNumberOfPoints() << endl;<br>
<br>
int traversal_points = 0;<br>
for (int i=0; i<poly_data->GetNumberOfCells(); i++) {<br>
traversal_points += poly_data->GetCell(i)->GetNumberOfPoints();<br>
}<br>
cout << "Traversal number of points: " << traversal_points << endl;<br>
<br>
Here is the output:<br>
<br>
Number of points: 286402<br>
Traversal number of points: 143204<br>
<br>
Why do I get two different answers? The second number is approximately half the first. What am I doing wrong?<br>
<br>
Thanks for your help,<br>
<br>
Kind regards,<br>
<br>
Dave<br>
<br>
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