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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Kitware.VTK;
namespace VolumeRendering
{
/// <summary>
/// Application to load and display a volume
/// </summary>
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private bool MouseDown1 = false;
private vtkRenderWindowInteractor Interactor = null;
private vtkRenderWindow RenderWindow = null;
private vtkRenderer Renderer = null;
private vtkImageActor ImageActor = null;
private vtkImageClip Clip = null;
string fileName = "";
/// <summary>
/// Tell the application when the mouse is being dragged
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void iren_LeftButtonReleaseEvt(vtkObject sender, vtkObjectEventArgs e)
{
this.MouseDown1 = false;
}
/// <summary>
/// Tell the application when the mouse is being dragged
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void iren_LeftButtonPressEvt(vtkObject sender, vtkObjectEventArgs e)
{
this.MouseDown1 = true;
}
/// <summary>
/// Display the render window with the 3D Volume in it
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void renderWindowControl2_Load(object sender, EventArgs e)
{
//Create all the objects for the pipeline
vtkRenderer renderer = renderWindowControl2.RenderWindow.GetRenderers().GetFirstRenderer();
vtkXMLImageDataReader reader = vtkXMLImageDataReader.New();
vtkFixedPointVolumeRayCastMapper texMapper = vtkFixedPointVolumeRayCastMapper.New();
vtkVolume vol = vtkVolume.New();
vtkColorTransferFunction ctf = vtkColorTransferFunction.New();
vtkPiecewiseFunction spwf = vtkPiecewiseFunction.New();
vtkPiecewiseFunction gpwf = vtkPiecewiseFunction.New();
//Read in the file
reader.SetFileName(fileName);
reader.Update();
//Go through the visulizatin pipeline
texMapper.SetInputConnection(reader.GetOutputPort());
//Set the color curve for the volume
ctf.AddHSVPoint(0, .67, .07, 1);
ctf.AddHSVPoint(94, .67, .07, 1);
ctf.AddHSVPoint(139, 0, 0, 0);
ctf.AddHSVPoint(160, .28, .047, 1);
ctf.AddHSVPoint(254, .38, .013, 1);
//Set the opacity curve for the volume
spwf.AddPoint(84, 0);
spwf.AddPoint(151, .1);
spwf.AddPoint(255, 1);
//Set the gradient curve for the volume
gpwf.AddPoint(0, .2);
gpwf.AddPoint(10, .2);
gpwf.AddPoint(25, 1);
vol.GetProperty().SetColor(ctf);
vol.GetProperty().SetScalarOpacity(spwf);
vol.GetProperty().SetGradientOpacity(gpwf);
vol.SetMapper(texMapper);
//Go through the Graphics Pipeline
renderer.AddVolume(vol);
}
/// <summary>
/// Display the render window with the slice in it
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void renderWindowControl1_Load(object sender, EventArgs e)
{
//Get the name of the Unsigned Char volume that you want to load
fileName = "../../../head.vti";
//Create all the objects for the pipeline
vtkXMLImageDataReader reader = vtkXMLImageDataReader.New();
vtkImageActor iactor = vtkImageActor.New();
vtkImageClip clip = vtkImageClip.New();
vtkContourFilter contour = vtkContourFilter.New();
vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
vtkActor actor = vtkActor.New();
vtkInteractorStyleImage style = vtkInteractorStyleImage.New();
vtkRenderer renderer = renderWindowControl1.RenderWindow.GetRenderers().GetFirstRenderer();
//Read the Image
reader.SetFileName(fileName);
//Go through the visulization pipeline
iactor.SetInput(reader.GetOutput());
renderer.AddActor(iactor);
reader.Update();
int[] extent = reader.GetOutput().GetWholeExtent();
iactor.SetDisplayExtent(extent[0], extent[1], extent[2], extent[3],
(extent[4] + extent[5]) / 2,
(extent[4] + extent[5]) / 2);
clip.SetInputConnection(reader.GetOutputPort());
clip.SetOutputWholeExtent(extent[0], extent[1], extent[2], extent[3],
(extent[4] + extent[5]) / 2,
(extent[4] + extent[5]) / 2);
contour.SetInputConnection(clip.GetOutputPort());
contour.SetValue(0, 100);
mapper.SetInputConnection(contour.GetOutputPort());
mapper.SetScalarVisibility(1);
//Go through the graphics pipeline
actor.SetMapper(mapper);
actor.GetProperty().SetColor(0, 1, 0);
renderer.AddActor(actor);
//Give a new style to the interactor
vtkRenderWindowInteractor iren = renderWindowControl1.RenderWindow.GetInteractor();
iren.SetInteractorStyle(style);
//Add new events to the interactor style
style.LeftButtonPressEvt += new vtkObject.vtkObjectEventHandler(iren_LeftButtonPressEvt);
style.LeftButtonReleaseEvt += new vtkObject.vtkObjectEventHandler(iren_LeftButtonReleaseEvt);
style.MouseMoveEvt += new vtkObject.vtkObjectEventHandler(iren_MouseMoveEvt);
//Update global variables
this.trackBar1.Maximum = extent[5];
this.trackBar1.Minimum = extent[4];
this.Interactor = iren;
this.RenderWindow = renderWindowControl1.RenderWindow;
this.Renderer = renderer;
this.Clip = clip;
this.ImageActor = iactor;
}
/// <summary>
/// Move the slice when the trackbar is moved
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void trackBar1_Scroll(object sender, EventArgs e)
{
if (ImageActor != null)
{
int[] lastPos = this.Interactor.GetLastEventPosition();
int[] size = this.RenderWindow.GetSize();
int[] dim = this.ImageActor.GetInput().GetDimensions();
int newSlice = (int)(trackBar1.Value);
if (newSlice >= 0 && newSlice < dim[2])
{
this.Clip.SetOutputWholeExtent(0, dim[0] - 1, 0, dim[1] - 1, newSlice, newSlice);
this.ImageActor.SetDisplayExtent(0, dim[0] - 1, 0, dim[1] - 1, newSlice, newSlice);
this.Renderer.ResetCameraClippingRange();
this.RenderWindow.Render();
}
}
}
/// <summary>
/// Move the slice and the trackbar when the mouse is dragged on the render window
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void iren_MouseMoveEvt(vtkObject sender, vtkObjectEventArgs e)
{
if (this.MouseDown1 && this.ImageActor != null)
{
int[] lastPos = this.Interactor.GetLastEventPosition();
int[] size = this.RenderWindow.GetSize();
int[] dim = this.ImageActor.GetInput().GetDimensions();
int newSlice = (int)((double)(dim[2] - 1.0) * (double)(lastPos[1]) / (double)(size[1]));
if (newSlice >= 0 && newSlice < dim[2])
{
this.trackBar1.Value = newSlice;
this.Clip.SetOutputWholeExtent(0, dim[0] - 1, 0, dim[1] - 1, newSlice, newSlice);
this.ImageActor.SetDisplayExtent(0, dim[0] - 1, 0, dim[1] - 1, newSlice, newSlice);
this.Renderer.ResetCameraClippingRange();
this.RenderWindow.Render();
}
}
}
/// <summary>
/// Clean Up any global variables that might still be around
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_Closed(object sender, FormClosedEventArgs e)
{
if (this.Interactor != null)
{
this.Interactor.Dispose();
}
if (this.ImageActor != null)
{
this.ImageActor.Dispose();
}
if (this.Clip != null)
{
this.Clip.Dispose();
}
}
}
}
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