static void Main(string[] args)
{
// create a sphere source, mapper, and actor
vtkSphereSource sphere = new vtkSphereSource();
vtkPolyDataMapper sphereMapper = new vtkPolyDataMapper();
sphereMapper.SetInputConnection(sphere.GetOutputPort());
vtkPolyDataMapper.GlobalImmediateModeRenderingOn();
vtkLODActor sphereActor = new vtkLODActor();
sphereActor.SetMapper(sphereMapper);
// create the spikes by glyphing the sphere with a cone. Create the
// mapper and actor for the glyphs.
vtkConeSource cone = new vtkConeSource();
vtkGlyph3D glyph = new vtkGlyph3D();
glyph.SetInputConnection(sphere.GetOutputPort());
glyph.SetSource(cone.GetOutput());
glyph.SetVectorModeToUseNormal();
glyph.SetScaleModeToScaleByVector();
glyph.SetScaleFactor(0.25);
vtkPolyDataMapper spikeMapper = new vtkPolyDataMapper();
spikeMapper.SetInputConnection(glyph.GetOutputPort());
vtkLODActor spikeActor = new vtkLODActor();
spikeActor.SetMapper(spikeMapper);
// Create a text mapper and actor to display the results of picking.
vtkTextMapper textMapper = new vtkTextMapper();
vtkTextProperty tprop = textMapper.GetTextProperty();
tprop.SetFontFamilyToArial();
tprop.SetFontSize(10);
tprop.BoldOn();
tprop.ShadowOn();
tprop.SetColor(1, 0, 0);
vtkActor2D textActor = new vtkActor2D();
textActor.VisibilityOff();
textActor.SetMapper(textMapper);
// Create a cell picker.
vtkCellPicker picker = new vtkCellPicker();
PickData pd = new PickData();
pd.textActor = textActor;
pd.textMapper = textMapper;
vtkDotNetCallback cb = new vtkDotNetCallback(pd.annotatePickCallback);
// Now at the end of the pick event call the above function.
picker.AddObserver((uint) EventIds.EndPickEvent, cb);
// Create the Renderer, RenderWindow, etc. and set the Picker.
vtkRenderer ren = new vtkRenderer();
vtkRenderWindow renWin = new vtkRenderWindow();
renWin.AddRenderer(ren);
vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
iren.SetRenderWindow(renWin);
iren.SetPicker(picker);
// Add the actors to the renderer, set the background and size
ren.AddActor2D(textActor);
ren.AddActor(sphereActor);
ren.AddActor(spikeActor);
ren.SetBackground(1, 1, 1);
renWin.SetSize(300, 300);
// Get the camera and zoom in closer to the image.
ren.ResetCamera();
vtkCamera cam1 = ren.GetActiveCamera();
cam1.Zoom(1.4);
iren.Initialize();
// Initially pick the cell at this location.
picker.Pick(85, 126, 0, ren);
renWin.Render();
iren.Start();
vtkWin32OpenGLRenderWindow win32win =
vtkWin32OpenGLRenderWindow.SafeDownCast(renWin);
if (null != win32win) win32win.Clean();
}