private void CreateSurfaceRendering()
{
_contourFilter = new vtk.vtkContourFilter();
_contourFilter.SetInput(_volumeGraphic.GetImageData());
_contourFilter.SetValue(0, _volumeGraphic.GetRescaledLevel());
vtkPolyDataNormals normals = new vtk.vtkPolyDataNormals();
normals.SetInputConnection(_contourFilter.GetOutputPort());
normals.SetFeatureAngle(60.0);
vtkStripper stripper = new vtk.vtkStripper();
stripper.SetInputConnection(normals.GetOutputPort());
vtkPolyDataMapper mapper = new vtk.vtkPolyDataMapper();
mapper.SetInputConnection(stripper.GetOutputPort());
mapper.ScalarVisibilityOff();
_vtkActor = new vtk.vtkActor();
_vtkActor.SetMapper(mapper);
_vtkActor.GetProperty().SetSpecular(.3);
_vtkActor.GetProperty().SetSpecularPower(20);
ApplySetting("Opacity");
ApplySetting("Level");
}
private void CreateSurfaceRendering()
{
_contourFilter = new vtk.vtkContourFilter();
_contourFilter.SetInput(_volumeGraphic.GetImageData());
_contourFilter.SetValue(0, _volumeGraphic.GetRescaledLevel());
vtkPolyDataNormals normals = new vtk.vtkPolyDataNormals();
normals.SetInputConnection(_contourFilter.GetOutputPort());
normals.SetFeatureAngle(60.0);
vtkStripper stripper = new vtk.vtkStripper();
stripper.SetInputConnection(normals.GetOutputPort());
vtkPolyDataMapper mapper = new vtk.vtkPolyDataMapper();
mapper.SetInputConnection(stripper.GetOutputPort());
mapper.ScalarVisibilityOff();
_vtkActor = new vtk.vtkActor();
_vtkActor.SetMapper(mapper);
_vtkActor.GetProperty().SetSpecular(.3);
_vtkActor.GetProperty().SetSpecularPower(20);
ApplySetting("Opacity");
ApplySetting("Level");
}
static void Main(string[] args)
{
string VTK_DATA_ROOT = vtk.vtkDotNetUtil.vtkGetDataRoot();
// Create the renderer, the render window, and the interactor. The
// renderer draws into the render window, the interactor enables mouse-
// and keyboard-based interaction with the scene.
vtkRenderer aRenderer = new vtk.vtkRenderer();
vtkRenderWindow renWin = new vtk.vtkRenderWindow();
renWin.AddRenderer(aRenderer);
vtkRenderWindowInteractor iren = new vtk.vtkRenderWindowInteractor();
iren.SetRenderWindow(renWin);
// The following reader is used to read a series of 2D slices (images);
// that compose the volume. The slice dimensions are set, and the
// pixel spacing. The data Endianness must also be specified. The reader
// usese the FilePrefix in combination with the slice number to construct
// filenames using the format FilePrefix.%d. (In this case the FilePrefix
// is the root name of the file: quarter.);
vtkVolume16Reader v16 = new vtk.vtkVolume16Reader();
v16.SetDataDimensions(64, 64);
v16.SetDataByteOrderToLittleEndian();
v16.SetFilePrefix(VTK_DATA_ROOT + "/Data/headsq/quarter");
v16.SetImageRange(1, 93);
v16.SetDataSpacing(3.2, 3.2, 1.5);
// An isosurface, or contour value of 500 is known to correspond to the
// skin of the patient. Once generated, a vtkPolyDataNormals filter is
// is used to create normals for smooth surface shading during rendering.
// The triangle stripper is used to create triangle strips from the
// isosurface these render much faster on may systems.
vtkContourFilter skinExtractor = new vtk.vtkContourFilter();
skinExtractor.SetInputConnection(v16.GetOutputPort());
skinExtractor.SetValue(0, 500);
vtkPolyDataNormals skinNormals = new vtk.vtkPolyDataNormals();
skinNormals.SetInputConnection(skinExtractor.GetOutputPort());
skinNormals.SetFeatureAngle(60.0);
vtkStripper skinStripper = new vtk.vtkStripper();
skinStripper.SetInputConnection(skinNormals.GetOutputPort());
vtkPolyDataMapper skinMapper = new vtk.vtkPolyDataMapper();
skinMapper.SetInputConnection(skinStripper.GetOutputPort());
skinMapper.ScalarVisibilityOff();
vtkActor skin = new vtk.vtkActor();
skin.SetMapper(skinMapper);
skin.GetProperty().SetDiffuseColor(1, .49, .25);
skin.GetProperty().SetSpecular(.3);
skin.GetProperty().SetSpecularPower(20);
// An isosurface, or contour value of 1150 is known to correspond to the
// skin of the patient. Once generated, a vtkPolyDataNormals filter is
// is used to create normals for smooth surface shading during rendering.
// The triangle stripper is used to create triangle strips from the
// isosurface these render much faster on may systems.
vtkContourFilter boneExtractor = new vtk.vtkContourFilter();
boneExtractor.SetInputConnection(v16.GetOutputPort());
boneExtractor.SetValue(0, 1150);
vtkPolyDataNormals boneNormals = new vtk.vtkPolyDataNormals();
boneNormals.SetInputConnection(boneExtractor.GetOutputPort());
boneNormals.SetFeatureAngle(60.0);
vtkStripper boneStripper = new vtk.vtkStripper();
boneStripper.SetInputConnection(boneNormals.GetOutputPort());
vtkPolyDataMapper boneMapper = new vtk.vtkPolyDataMapper();
boneMapper.SetInputConnection(boneStripper.GetOutputPort());
boneMapper.ScalarVisibilityOff();
vtkActor bone = new vtk.vtkActor();
bone.SetMapper(boneMapper);
bone.GetProperty().SetDiffuseColor(1, 1, .9412);
// An outline provides context around the data.
vtkOutlineFilter outlineData = new vtk.vtkOutlineFilter();
outlineData.SetInputConnection(v16.GetOutputPort());
vtkPolyDataMapper mapOutline = new vtk.vtkPolyDataMapper();
mapOutline.SetInputConnection(outlineData.GetOutputPort());
vtkActor outline = new vtk.vtkActor();
outline.SetMapper(mapOutline);
outline.GetProperty().SetColor(0, 0, 0);
// Now we are creating three orthogonal planes passing through the
// volume. Each plane uses a different texture map and therefore has
// diferent coloration.
// Start by creatin a black/white lookup table.
vtkLookupTable bwLut = new vtk.vtkLookupTable();
bwLut.SetTableRange(0, 2000);
bwLut.SetSaturationRange(0, 0);
bwLut.SetHueRange(0, 0);
bwLut.SetValueRange(0, 1);
bwLut.Build();
// Now create a lookup table that consists of the full hue circle (from
// HSV);.
vtkLookupTable hueLut = new vtk.vtkLookupTable();
hueLut.SetTableRange(0, 2000);
hueLut.SetHueRange(0, 1);
hueLut.SetSaturationRange(1, 1);
hueLut.SetValueRange(1, 1);
hueLut.Build();
// Finally, create a lookup table with a single hue but having a range
// in the saturation of the hue.
vtkLookupTable satLut = new vtk.vtkLookupTable();
satLut.SetTableRange(0, 2000);
satLut.SetHueRange(.6, .6);
satLut.SetSaturationRange(0, 1);
satLut.SetValueRange(1, 1);
satLut.Build();
// Create the first of the three planes. The filter vtkImageMapToColors
// maps the data through the corresponding lookup table created above.
// The vtkImageActor is a type of vtkProp and conveniently displays an
// image on a single quadrilateral plane. It does this using texture
// mapping and as a result is quite fast. (Note: the input image has to
// be unsigned char values, which the vtkImageMapToColors produces.);
// Note also that by specifying the DisplayExtent, the pipeline
// requests data of this extent and the vtkImageMapToColors only
// processes a slice of data.
vtkImageMapToColors saggitalColors = new vtk.vtkImageMapToColors();
saggitalColors.SetInputConnection(v16.GetOutputPort());
saggitalColors.SetLookupTable(bwLut);
vtkImageActor saggital = new vtk.vtkImageActor();
saggital.SetInput(saggitalColors.GetOutput());
saggital.SetDisplayExtent(32, 32, 0, 63, 0, 92);
// Create the second (axial); plane of the three planes. We use the same
// approach as before except that the extent differs.
vtkImageMapToColors axialColors = new vtk.vtkImageMapToColors();
axialColors.SetInputConnection(v16.GetOutputPort());
axialColors.SetLookupTable(hueLut);
vtkImageActor axial = new vtk.vtkImageActor();
axial.SetInput(axialColors.GetOutput());
axial.SetDisplayExtent(0, 63, 0, 63, 46, 46);
// Create the third (coronal); plane of the three planes. We use the same
// approach as before except that the extent differs.
vtkImageMapToColors coronalColors = new vtk.vtkImageMapToColors();
coronalColors.SetInputConnection(v16.GetOutputPort());
coronalColors.SetLookupTable(satLut);
vtkImageActor coronal = new vtk.vtkImageActor();
coronal.SetInput(coronalColors.GetOutput());
coronal.SetDisplayExtent(0, 63, 32, 32, 0, 92);
// It is convenient to create an initial view of the data. The FocalPoint
// and Position form a vector direction. Later on (ResetCamera(); method);
// this vector is used to position the camera to look at the data in
// this direction.
vtkCamera aCamera = new vtk.vtkCamera();
aCamera.SetViewUp(0, 0, -1);
aCamera.SetPosition(0, 1, 0);
aCamera.SetFocalPoint(0, 0, 0);
aCamera.ComputeViewPlaneNormal();
// Actors are added to the renderer.
aRenderer.AddActor(outline);
aRenderer.AddActor(saggital);
aRenderer.AddActor(axial);
aRenderer.AddActor(coronal);
//aRenderer.AddActor(axial);
//aRenderer.AddActor(coronal);
aRenderer.AddActor(skin);
aRenderer.AddActor(bone);
// Turn off bone for this example.
bone.VisibilityOff();
// Set skin to semi-transparent.
skin.GetProperty().SetOpacity(0.5);
// An initial camera view is created. The Dolly(); method moves
// the camera towards the FocalPoint, thereby enlarging the image.
aRenderer.SetActiveCamera(aCamera);
aRenderer.ResetCamera();
aCamera.Dolly(1.5);
// Set a background color for the renderer and set the size of the
// render window (expressed in pixels);.
aRenderer.SetBackground(1, 1, 1);
renWin.SetSize(640, 480);
// Note that when camera movement occurs (as it does in the Dolly();
// method);, the clipping planes often need adjusting. Clipping planes
// consist of two planes: near and far along the view direction. The
// near plane clips out objects in front of the plane the far plane
// clips out objects behind the plane. This way only what is drawn
// between the planes is actually rendered.
aRenderer.ResetCameraClippingRange();
// Interact with the data.
iren.Initialize();
renWin.Render();
iren.Start();
vtk.vtkWin32OpenGLRenderWindow win32win =
vtk.vtkWin32OpenGLRenderWindow.SafeDownCast(renWin);
win32win.Clean();
}
