PolyDataConnectivityFilter LargestRegion
VTKExamples/CSharp/PolyData/PolyDataConnectivityFilter_LargestRegion
Description¶
This example extracts the largest connected region of a mesh. Note that this is based on the number of points, not the actual area of the region.
- Contributed by: Jinyoung Hwang
A tutorial on how to setup a Windows Forms Application utilizing ActiViz.NET can be found here: Setup a Windows Forms Application to use ActiViz.NET
Code¶
PolyDataConnectivityFilter_LargestRegion.cs
using System; using System.Collections.Generic; using System.ComponentModel; using System.Windows.Forms; using System.Diagnostics; using Kitware.VTK; namespace ActiViz.Examples { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void renderWindowControl1_Load(object sender, EventArgs e) { try { vtkPolyDataConnectivityFilter_LargestRegion(); } catch(Exception ex) { MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK); } } private void vtkPolyDataConnectivityFilter_LargestRegion() { // Small sphere vtkSphereSource sphereSource1 = vtkSphereSource.New(); sphereSource1.Update(); // Large sphere vtkSphereSource sphereSource2 = vtkSphereSource.New(); sphereSource2.SetRadius(10); sphereSource2.SetCenter(25, 0, 0); sphereSource2.SetThetaResolution(10); sphereSource2.SetPhiResolution(10); sphereSource2.Update(); vtkAppendPolyData appendFilter = vtkAppendPolyData.New(); appendFilter.AddInputConnection(sphereSource1.GetOutputPort()); appendFilter.AddInputConnection(sphereSource2.GetOutputPort()); appendFilter.Update(); vtkPolyDataConnectivityFilter connectivityFilter = vtkPolyDataConnectivityFilter.New(); connectivityFilter.SetInputConnection(appendFilter.GetOutputPort()); connectivityFilter.SetExtractionModeToLargestRegion(); connectivityFilter.Update(); // Create a mapper and actor for original data vtkPolyDataMapper originalMapper = vtkPolyDataMapper.New(); originalMapper.SetInputConnection(appendFilter.GetOutputPort()); originalMapper.Update(); vtkActor originalActor = vtkActor.New(); originalActor.SetMapper(originalMapper); // Create a mapper and actor for extracted data vtkPolyDataMapper extractedMapper = vtkPolyDataMapper.New(); extractedMapper.SetInputConnection(connectivityFilter.GetOutputPort()); extractedMapper.Update(); vtkActor extractedActor = vtkActor.New(); extractedActor.GetProperty().SetColor(1, 0, 0); extractedActor.SetMapper(extractedMapper); // get a reference to the renderwindow of our renderWindowControl1 vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow; // renderer vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer(); // set background color renderer.SetBackground(0.2, 0.3, 0.4); // add our actor to the renderer renderer.AddActor(originalActor); renderer.AddActor(extractedActor); } } }