WriteVTI
VTKExamples/CSharp/IO/WriteVTI
Description¶
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¶
WriteVTI.cs
using System; using System.Collections.Generic; using System.ComponentModel; using System.Windows.Forms; using System.Diagnostics; using System.IO; using Kitware.VTK; namespace ActiViz.Examples { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void renderWindowControl1_Load(object sender, EventArgs e) { try { WriteVTI(); } catch(Exception ex) { MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK); } } private void WriteVTI() { // 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\test_vti.vti"); vtkImageData imageData = vtkImageData.New(); imageData.SetDimensions(3, 4, 5); imageData.SetNumberOfScalarComponents(1); imageData.SetScalarTypeToDouble(); int[] dims = imageData.GetDimensions(); // Fill every entry of the image data with "2.0" /* we can do this in unsafe mode which looks pretty similar to the c++ version but then you must declare at the very top of your file the "preprocessor" directive #define UNSAFE * or whatever name you choose for the following preprocessor #if statement */ #if UNSAFE unsafe { for(int z = 0; z < dims[2]; z++) { for(int y = 0; y < dims[1]; y++) { for(int x = 0; x < dims[0]; x++) { double* pixel = (double*)imageData.GetScalarPointer(x, y, z).ToPointer(); // c++ version: // double* pixel = static_cast<double*>(imageData->GetScalarPointer(x,y,z)); pixel[0] = 2.0; } } } } #else /* or we can do it in managed mode */ int size = imageData.GetScalarSize(); IntPtr ptr = Marshal.AllocHGlobal(size); for(int z = 0; z < dims[2]; z++) { for(int y = 0; y < dims[1]; y++) { for(int x = 0; x < dims[0]; x++) { ptr = imageData.GetScalarPointer(x, y, z); Marshal.Copy(new double[] { 2.0 }, 0, ptr, 1); } } } Marshal.FreeHGlobal(ptr); #endif vtkXMLImageDataWriter writer = vtkXMLImageDataWriter.New(); writer.SetFileName(filePath); writer.SetInputConnection(imageData.GetProducerPort()); writer.Write(); // Read and display file for verification that it was written correctly vtkXMLImageDataReader reader = vtkXMLImageDataReader.New(); if(reader.CanReadFile(filePath) == 0) { MessageBox.Show("Cannot read file \"" + filePath + "\"", "Error", MessageBoxButtons.OK); return; } reader.SetFileName(filePath); reader.Update(); // Convert the image to a polydata vtkImageDataGeometryFilter imageDataGeometryFilter = vtkImageDataGeometryFilter.New(); imageDataGeometryFilter.SetInputConnection(reader.GetOutputPort()); imageDataGeometryFilter.Update(); vtkDataSetMapper mapper = vtkDataSetMapper.New(); mapper.SetInputConnection(imageDataGeometryFilter.GetOutputPort()); // actor vtkActor actor = vtkActor.New(); actor.SetMapper(mapper); actor.GetProperty().SetPointSize(4); // 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); } } }