<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)">Hi <br><br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)">I have a vtp file that contains a polydata. I want to extract its connected component. However, when I use<i> vtkPolyDataConnectivityFilter</i><b>, </b>and read the number of regions, it shows that the it is equal to the number of polys. But when I visualize the file I see that there are actually 4 regions.<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)">I use<code><span class="gmail-str"> SetExtractionModeToAllRegions to read the number of regions.</span></code><br>I have attached the file. Can you please help me to understand what the problem is<code><span class="gmail-str"><br></span></code></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)"><code><span class="gmail-str"><br>So here is my code<br><br>vtkSmartPointer<vtkPolyDataConnectivityFilter> connectivityFilter = vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();<br>    connectivityFilter->SetInputData(poly_in);<br>    connectivityFilter->ScalarConnectivityOn();<br><br>    connectivityFilter->SetExtractionModeToAllRegions();<br><br>    connectivityFilter->Update();<br>    int nbregions = connectivityFilter->GetNumberOfExtractedRegions();<br><br>    cout << "Number of Extracted Regions are=" << nbregions << endl;<br></span></code></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)"></div><br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(7,55,99)">Thanks<b><br></b></div></div>