private void RenderVTP()
{
// reader
// Read all the data from the file
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
reader.SetFileName(m_FileName);
reader.Update(); // here we read the file actually
// mapper
vtkDataSetMapper mapper = vtkDataSetMapper.New();
mapper.SetInputConnection(reader.GetOutputPort());
// actor
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
// add our actor to the renderer
imgPropList.Add(actor);
m_Renderer.AddActor(actor);
m_Renderer.ResetCamera();
//Rerender the screen
m_RenderWindow.Render();
m_Renderer.Render();
}
private void Curvature()
{
// Path to vtk data must be set as an environment variable
// VTK_DATA_ROOT = "C:\VTK\vtkdata-5.8.0"
vtkTesting test = vtkTesting.New();
string root = test.GetDataRoot();
// note: one should use a coarse surface mesh to achieve a good visual effect
string filePath = System.IO.Path.Combine(root, @"Data\bunny.vtp");
// Create a polydata
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
reader.SetFileName(filePath);
vtkCurvatures curvaturesFilter = vtkCurvatures.New();
curvaturesFilter.SetInputConnection(reader.GetOutputPort());
//curvaturesFilter.SetCurvatureTypeToGaussian();
//curvaturesFilter.SetCurvatureTypeToMean();
//curvaturesFilter.SetCurvatureTypeToMaximum();
curvaturesFilter.SetCurvatureTypeToMinimum();
// To inspect more closely, if required
vtkXMLPolyDataWriter writer = vtkXMLPolyDataWriter.New();
writer.SetInputConnection(curvaturesFilter.GetOutputPort());
writer.SetFileName(System.IO.Path.Combine(root, @"Data\gauss.vtp"));
writer.Write();
// Create a mapper and actor
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
mapper.SetInputConnection(curvaturesFilter.GetOutputPort());
double[] range = curvaturesFilter.GetOutput().GetScalarRange();
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);
}
private void ReadPolyData()
{
// Path to vtk data must be set as an environment variable
// VTK_DATA_ROOT = "C:\VTK\vtkdata-5.8.0"
vtkTesting test = vtkTesting.New();
string root = test.GetDataRoot();
// string filePath = System.IO.Path.Combine(root, @"Data\SyntheticPolyline.vtp");
// string filePath = System.IO.Path.Combine(root, @"Data\uniform-001371-5x5x5.vtp");
// string filePath = System.IO.Path.Combine(root, @"Data\political.vtp");
// string filePath = System.IO.Path.Combine(root, @"Data\filledContours.vtp");
// string filePath = System.IO.Path.Combine(root, @"Data\disk_out_ref_surface.vtp");
string filePath = System.IO.Path.Combine(root, @"Data\cow.vtp");
// reader
// Read all the data from the file
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
if (reader.CanReadFile(filePath) == 0)
{
MessageBox.Show("Cannot read file \"" + filePath + "\"", "Error", MessageBoxButtons.OK);
return;
}
reader.SetFileName(filePath);
reader.Update(); // here we read the file actually
// mapper
vtkDataSetMapper mapper = vtkDataSetMapper.New();
mapper.SetInputConnection(reader.GetOutputPort());
// actor
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(0.2, 0.3, 0.4);
// add our actor to the renderer
renderer.AddActor(actor);
}
private void Subdivision(string filePath)
{
vtkPolyData originalMesh;
if (filePath != null)
{
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
reader.SetFileName(filePath);
// Subdivision filters only work on triangles
vtkTriangleFilter triangles = vtkTriangleFilter.New();
triangles.SetInputConnection(reader.GetOutputPort());
triangles.Update();
originalMesh = triangles.GetOutput();
}
else
{
vtkSphereSource sphereSource = vtkSphereSource.New();
sphereSource.Update();
originalMesh = sphereSource.GetOutput();
}
Debug.WriteLine("Before subdivision");
Debug.WriteLine(" There are " + originalMesh.GetNumberOfPoints()
+ " points.");
Debug.WriteLine(" There are " + originalMesh.GetNumberOfPolys()
+ " triangles.");
int numberOfViewports = 3;
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
this.Size = new System.Drawing.Size(200 * numberOfViewports + 12, 252);
this.Text += " - Subdivision";
Random rnd = new Random(2);
int numberOfSubdivisions = 2;
// Create one text property for all
vtkTextProperty textProperty = vtkTextProperty.New();
textProperty.SetFontSize(14);
textProperty.SetJustificationToCentered();
for (int i = 0; i < numberOfViewports; i++)
{
// Note: Here we create a superclass pointer (vtkPolyDataAlgorithm) so that we can easily instantiate different
// types of subdivision filters. Typically you would not want to do this, but rather create the pointer to be the type
// filter you will actually use, e.g.
// <vtkLinearSubdivisionFilter> subdivisionFilter = <vtkLinearSubdivisionFilter>.New();
vtkPolyDataAlgorithm subdivisionFilter;
switch (i)
{
case 0:
subdivisionFilter = vtkLinearSubdivisionFilter.New();
((vtkLinearSubdivisionFilter)subdivisionFilter).SetNumberOfSubdivisions(numberOfSubdivisions);
break;
case 1:
subdivisionFilter = vtkLoopSubdivisionFilter.New();
((vtkLoopSubdivisionFilter)subdivisionFilter).SetNumberOfSubdivisions(numberOfSubdivisions);
break;
case 2:
subdivisionFilter = vtkButterflySubdivisionFilter.New();
((vtkButterflySubdivisionFilter)subdivisionFilter).SetNumberOfSubdivisions(numberOfSubdivisions);
break;
default:
subdivisionFilter = vtkLinearSubdivisionFilter.New();
((vtkLinearSubdivisionFilter)subdivisionFilter).SetNumberOfSubdivisions(numberOfSubdivisions);
break;
}
#if VTK_MAJOR_VERSION_5
subdivisionFilter.SetInputConnection(originalMesh.GetProducerPort());
#else
subdivisionFilter.SetInputData(originalMesh);
#endif
subdivisionFilter.Update();
vtkRenderer renderer = vtkRenderer.New();
renderWindow.AddRenderer(renderer);
renderer.SetViewport((float)i / numberOfViewports, 0, (float)(i + 1) / numberOfViewports, 1);
renderer.SetBackground(.2 + rnd.NextDouble() / 8, .3 + rnd.NextDouble() / 8, .4 + rnd.NextDouble() / 8);
vtkTextMapper textMapper = vtkTextMapper.New();
vtkActor2D textActor = vtkActor2D.New();
textMapper.SetInput(subdivisionFilter.GetClassName());
textMapper.SetTextProperty(textProperty);
textActor.SetMapper(textMapper);
textActor.SetPosition(100, 16);
//Create a mapper and actor
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
mapper.SetInputConnection(subdivisionFilter.GetOutputPort());
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
renderer.AddActor(actor);
renderer.AddActor(textActor);
renderer.ResetCamera();
}
renderWindow.Render();
}
private void WritePolyData()
{
// Path to vtk data must be set as an environment variable
// VTK_DATA_ROOT = "C:\VTK\vtkdata-5.8.0"
vtkTesting test = vtkTesting.New();
string root = test.GetDataRoot();
string filePath = System.IO.Path.Combine(root, @"Data\poly_test.vtp");
// Create 4 points for a tetrahedron
vtkPoints points = vtkPoints.New();
points.InsertNextPoint(0, 0, 0);
points.InsertNextPoint(0, 0, 1);
points.InsertNextPoint(1, 0, 0);
points.InsertNextPoint(0, 1, 0);
// Create a polydata object and add the points to it.
vtkPolyData polydata = vtkPolyData.New();
polydata.SetPoints(points);
// it's not enough only to define points
// we need to define faces too
// (must be defined in counter clockwise order as viewed from the outside)
vtkTriangle face0 = vtkTriangle.New();
face0.GetPointIds().SetId(0, 0);
face0.GetPointIds().SetId(1, 2);
face0.GetPointIds().SetId(2, 1);
vtkTriangle face1 = vtkTriangle.New();
face1.GetPointIds().SetId(0, 0);
face1.GetPointIds().SetId(1, 3);
face1.GetPointIds().SetId(2, 2);
vtkTriangle face2 = vtkTriangle.New();
face2.GetPointIds().SetId(0, 0);
face2.GetPointIds().SetId(1, 1);
face2.GetPointIds().SetId(2, 3);
vtkTriangle face3 = vtkTriangle.New();
face3.GetPointIds().SetId(0, 1);
face3.GetPointIds().SetId(1, 2);
face3.GetPointIds().SetId(2, 3);
vtkCellArray faces = vtkCellArray.New();
faces.InsertNextCell(face0);
faces.InsertNextCell(face1);
faces.InsertNextCell(face2);
faces.InsertNextCell(face3);
polydata.SetPolys(faces);
// Write the file
vtkXMLPolyDataWriter writer = vtkXMLPolyDataWriter.New();
writer.SetFileName(filePath);
writer.SetInput(polydata);
// Optional - set the mode. The default is binary.
//writer.SetDataModeToBinary();
writer.SetDataModeToAscii();
writer.Write();
// Read and display file for verification that it was written correctly
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
if (reader.CanReadFile(filePath) == 0)
{
MessageBox.Show("Cannot read file \"" + filePath + "\"", "Error", MessageBoxButtons.OK);
return;
}
reader.SetFileName(filePath);
reader.Update();
vtkDataSetMapper mapper = vtkDataSetMapper.New();
mapper.SetInputConnection(reader.GetOutputPort());
// actor
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(0.2, 0.3, 0.4);
// add our actor to the renderer
renderer.AddActor(actor);
}
private void FilledContours(string filePath, int numberOfContours)
{
// Read the file
vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
reader.SetFileName(filePath);
reader.Update(); // Update so that we can get the scalar range
double[] scalarRange = reader.GetOutput().GetPointData().GetScalars().GetRange();
vtkAppendPolyData appendFilledContours = vtkAppendPolyData.New();
double delta = (scalarRange[1] - scalarRange[0]) / (numberOfContours - 1);
// Keep the clippers alive
List <vtkClipPolyData> clippersLo = new List <vtkClipPolyData>();
List <vtkClipPolyData> clippersHi = new List <vtkClipPolyData>();
for (int i = 0; i < numberOfContours; i++)
{
double valueLo = scalarRange[0] + i * delta;
double valueHi = scalarRange[0] + (i + 1) * delta;
clippersLo.Add(vtkClipPolyData.New());
clippersLo[i].SetValue(valueLo);
if (i == 0)
{
clippersLo[i].SetInputConnection(reader.GetOutputPort());
}
else
{
clippersLo[i].SetInputConnection(clippersHi[i - 1].GetOutputPort(1));
}
clippersLo[i].InsideOutOff();
clippersLo[i].Update();
clippersHi.Add(vtkClipPolyData.New());
clippersHi[i].SetValue(valueHi);
clippersHi[i].SetInputConnection(clippersLo[i].GetOutputPort());
clippersHi[i].GenerateClippedOutputOn();
clippersHi[i].InsideOutOn();
clippersHi[i].Update();
if (clippersHi[i].GetOutput().GetNumberOfCells() == 0)
{
continue;
}
vtkFloatArray cd = vtkFloatArray.New();
cd.SetNumberOfComponents(1);
cd.SetNumberOfTuples(clippersHi[i].GetOutput().GetNumberOfCells());
cd.FillComponent(0, valueLo);
clippersHi[i].GetOutput().GetCellData().SetScalars(cd);
appendFilledContours.AddInputConnection(clippersHi[i].GetOutputPort());
}
vtkCleanPolyData filledContours = vtkCleanPolyData.New();
filledContours.SetInputConnection(appendFilledContours.GetOutputPort());
vtkLookupTable lut = vtkLookupTable.New();
lut.SetNumberOfTableValues(numberOfContours + 1);
lut.Build();
vtkPolyDataMapper contourMapper = vtkPolyDataMapper.New();
contourMapper.SetInputConnection(filledContours.GetOutputPort());
contourMapper.SetScalarRange(scalarRange[0], scalarRange[1]);
contourMapper.SetScalarModeToUseCellData();
contourMapper.SetLookupTable(lut);
vtkActor contourActor = vtkActor.New();
contourActor.SetMapper(contourMapper);
contourActor.GetProperty().SetInterpolationToFlat();
vtkContourFilter contours = vtkContourFilter.New();
contours.SetInputConnection(filledContours.GetOutputPort());
contours.GenerateValues(numberOfContours, scalarRange[0], scalarRange[1]);
vtkPolyDataMapper contourLineMapperer = vtkPolyDataMapper.New();
contourLineMapperer.SetInputConnection(contours.GetOutputPort());
contourLineMapperer.SetScalarRange(scalarRange[0], scalarRange[1]);
contourLineMapperer.ScalarVisibilityOff();
vtkActor contourLineActor = vtkActor.New();
contourLineActor.SetMapper(contourLineMapperer);
contourLineActor.GetProperty().SetLineWidth(2);
// get a reference to the renderwindow of our renderWindowControl1
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
// renderer
vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
// set background color
renderer.SetBackground(.2, .3, .4);
// add our actor to the renderer
renderer.AddActor(contourActor);
renderer.AddActor(contourLineActor);
}
