# MarchingSquares

VTKExamples/CSharp/WishList/Modelling/MarchingSquares

### 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
Note: As long as ActiViz.NET is not build with VTK version 6.0 or higher you must define the preprocessor directive VTK_MAJOR_VERSION_5.

### Code

MarchingSquares.cs

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Windows.Forms;
    using System.Diagnostics;

    using Kitware.VTK;

    namespace ActiViz.Examples {
       public partial class Form1 : Form {
          public Form1() {
             InitializeComponent();
          }

          private void renderWindowControl1_Load(object sender, EventArgs e) {
             try {
                MarchingSquares();
             }
             catch(Exception ex) {
                MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK);
             }
          }

          private void MarchingSquares() {
             // 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();

             vtkVolume16Reader v16 = vtkVolume16Reader.New();
             v16.SetDataDimensions(64, 64);

             v16.GetOutput().SetOrigin(0.0, 0.0, 0.0);
             v16.SetDataByteOrderToLittleEndian();
             v16.SetFilePrefix(System.IO.Path.Combine(root, @"Data\headsq\quarter"));
             v16.SetImageRange(1, 93);
             v16.SetDataSpacing(3.2, 3.2, 1.5);
             v16.Update();

             vtkMergePoints myLocator = vtkMergePoints.New();

             vtkMarchingSquares isoXY = vtkMarchingSquares.New();

    #if VTK_MAJOR_VERSION_5
             isoXY.SetInputConnection(v16.GetOutputPort());
    #else
             isoXY.SetInputData(v16);
    #endif
             isoXY.GenerateValues(2, 600, 1200);
             isoXY.SetImageRange(0, 32, 32, 63, 45, 45);
             isoXY.SetLocator(myLocator);

             vtkPolyDataMapper isoXYMapper = vtkPolyDataMapper.New();
    #if VTK_MAJOR_VERSION_5
             isoXYMapper.SetInputConnection(isoXY.GetOutputPort());
    #else
             isoXYMapper.SetInputData(isoXY);
    #endif
             isoXYMapper.SetScalarRange(600, 1200);

             vtkActor isoXYActor = vtkActor.New();
             isoXYActor.SetMapper(isoXYMapper);

             vtkMarchingSquares isoYZ = vtkMarchingSquares.New();
    #if VTK_MAJOR_VERSION_5
             isoYZ.SetInputConnection(v16.GetOutputPort());
    #else
             isoYZ.SetInputData(v16);
    #endif
             isoYZ.GenerateValues(2, 600, 1200);
             isoYZ.SetImageRange(32, 32, 32, 63, 46, 92);

             vtkPolyDataMapper isoYZMapper = vtkPolyDataMapper.New();
    #if VTK_MAJOR_VERSION_5
             isoYZMapper.SetInputConnection(isoYZ.GetOutputPort());
    #else
             isoYZMapper.SetInputData(isoYZ);
    #endif
             isoYZMapper.SetScalarRange(600, 1200);

             vtkActor isoYZActor = vtkActor.New();
             isoYZActor.SetMapper(isoYZMapper);

             vtkMarchingSquares isoXZ  = vtkMarchingSquares.New();
    #if VTK_MAJOR_VERSION_5
             isoXZ.SetInputConnection(v16.GetOutputPort());
    #else
             isoXZ.SetInputData(v16);
    #endif
             isoXZ.GenerateValues(2, 600, 1200);
             isoXZ.SetImageRange(0, 32, 32, 32, 0, 46);

             vtkPolyDataMapper isoXZMapper = vtkPolyDataMapper.New();
    #if VTK_MAJOR_VERSION_5
             isoXZMapper.SetInputConnection(isoXZ.GetOutputPort());
    #else
             isoXZMapper.SetInputData(isoXZ);
    #endif
             isoXZMapper.SetScalarRange(600, 1200);

             vtkActor isoXZActor = vtkActor.New();
             isoXZActor.SetMapper(isoXZMapper);

             vtkOutlineFilter outline  = vtkOutlineFilter.New();
    #if VTK_MAJOR_VERSION_5
             outline.SetInputConnection(v16.GetOutputPort());
    #else
             outline.SetInputData(v16);
    #endif
             vtkPolyDataMapper outlineMapper = vtkPolyDataMapper.New();
    #if VTK_MAJOR_VERSION_5
             outlineMapper.SetInputConnection(outline.GetOutputPort());
    #else
             outlineMapper.SetInputData(outline);
    #endif
             vtkActor outlineActor = vtkActor.New();
             outlineActor.SetMapper(outlineMapper);
             outlineActor.VisibilityOff();

             // 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 the actors to the renderer, set the background and size
             renderer.AddActor(outlineActor);
             renderer.AddActor(isoXYActor);
             renderer.AddActor(isoYZActor);
             renderer.AddActor(isoXZActor);
             renderer.GetActiveCamera().SetPosition(324.368, 284.266, -19.3293);
             renderer.GetActiveCamera().SetFocalPoint(73.5683, 120.903, 70.7309);
             renderer.GetActiveCamera().SetViewAngle(30);
             renderer.GetActiveCamera().SetViewUp(-0.304692, -0.0563843, -0.950781);
          }
       }
    }