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);
}
private void ColorDisconnectedRegions()
{
// Create some spheres
vtkSphereSource sphereSource1 = vtkSphereSource.New();
sphereSource1.Update();
vtkSphereSource sphereSource2 = vtkSphereSource.New();
sphereSource2.SetCenter(5, 0, 0);
sphereSource2.Update();
vtkSphereSource sphereSource3 = vtkSphereSource.New();
sphereSource3.SetCenter(10, 0, 0);
sphereSource3.Update();
vtkAppendPolyData appendFilter = vtkAppendPolyData.New();
appendFilter.AddInputConnection(sphereSource1.GetOutputPort());
appendFilter.AddInputConnection(sphereSource2.GetOutputPort());
appendFilter.AddInputConnection(sphereSource3.GetOutputPort());
vtkPolyDataConnectivityFilter connectivityFilter = vtkPolyDataConnectivityFilter.New();
connectivityFilter.SetInputConnection(appendFilter.GetOutputPort());
connectivityFilter.SetExtractionModeToAllRegions();
connectivityFilter.ColorRegionsOn();
connectivityFilter.Update();
// Visualize
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
mapper.SetInputConnection(connectivityFilter.GetOutputPort());
double[] range = connectivityFilter.GetOutput().GetPointData().GetArray("RegionId").GetRange();
mapper.SetScalarRange(range[0], range[1]);
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
// get a reference to the renderwindow of our renderWindowControl1
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
// renderer
vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
// set background color
renderer.SetBackground(0.0, 0.0, 0.0);
// add our actor to the renderer
renderer.AddActor(actor);
}
