ReadPolyData

VTKExamples/CSharp/IO/ReadPolyData


Description

This example reads a polygonal data (.vtp) file. An example data set can be found at VTKData/Data/SyntheticPolyline.vtp
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

ReadPolyData.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 {
            ReadPolyData();
         }
         catch(Exception ex) {
            MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK);
         }
      }


      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);
      }
   }
}