private void HighLightBadCells()
{
vtkSphereSource sphereSource = vtkSphereSource.New();
sphereSource.Update();
vtkTriangleFilter triangleFilter = vtkTriangleFilter.New();
triangleFilter.SetInputConnection(sphereSource.GetOutputPort());
triangleFilter.Update();
//Create a mapper and actor
vtkDataSetMapper sphereMapper = vtkDataSetMapper.New();
sphereMapper.SetInputConnection(triangleFilter.GetOutputPort());
vtkActor sphereActor = vtkActor.New();
sphereActor.SetMapper(sphereMapper);
vtkPolyData mesh = triangleFilter.GetOutput();
Debug.WriteLine("There are " + mesh.GetNumberOfCells() + " cells.");
vtkMeshQuality qualityFilter = vtkMeshQuality.New();
#if VTK_MAJOR_VERSION_5
qualityFilter.SetInput(mesh);
#else
qualityFilter.SetInputData(mesh);
#endif
qualityFilter.SetTriangleQualityMeasureToArea();
qualityFilter.Update();
vtkDataSet qualityMesh = qualityFilter.GetOutput();
vtkDoubleArray qualityArray = vtkDoubleArray.SafeDownCast(qualityMesh.GetCellData().GetArray("Quality"));
Debug.WriteLine("There are " + qualityArray.GetNumberOfTuples() + " values.");
for (int i = 0; i < qualityArray.GetNumberOfTuples(); i++)
{
double val = qualityArray.GetValue(i);
Debug.WriteLine("value " + i + ": " + val);
}
vtkThreshold selectCells = vtkThreshold.New();
selectCells.ThresholdByLower(.02);
selectCells.SetInputArrayToProcess(
0,
0,
0,
1, // POINTS = 0, CELLS = 1, NONE = 2, POINTS_THEN_CELLS = 3, VERTICES = 4, EDGES = 5, ROWS = 6
0 // SCALARS = 0, VECTORS = 1, NORMALS = 2, TCOORDS = 3, TENSORS = 4, GLOBALIDS = 5, PEDIGREEIDS = 6, EDGEFLAG = 7
);
#if VTK_MAJOR_VERSION_5
selectCells.SetInput(qualityMesh);
#else
selectCells.SetInputData(qualityMesh);
#endif
selectCells.Update();
vtkUnstructuredGrid ug = selectCells.GetOutput();
// Create a mapper and actor
vtkDataSetMapper mapper = vtkDataSetMapper.New();
#if VTK_MAJOR_VERSION_5
mapper.SetInput(ug);
#else
mapper.SetInputData(ug);
#endif
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
actor.GetProperty().SetColor(1.0, 0.0, 0.0);
actor.GetProperty().SetRepresentationToWireframe();
actor.GetProperty().SetLineWidth(5);
// get a reference to the renderwindow of our renderWindowControl1
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
// renderer
vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
// set background color
renderer.SetBackground(1.0, 1.0, 1.0);
// add our actors to the renderer
renderer.AddActor(actor);
renderer.AddActor(sphereActor);
}
