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 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);
}
