static void myCallback(vtk.vtkObject caller, uint eventId,
object clientData, IntPtr callData)
{
System.Diagnostics.Debug.WriteLine("Callback has been called.");
vtk.vtkBoxWidget boxWidget = vtk.vtkBoxWidget.SafeDownCast(caller);
if (null != boxWidget)
{
using (vtk.vtkTransform t = new vtk.vtkTransform())
{
boxWidget.GetTransform(t);
boxWidget.GetProp3D().SetUserTransform(t);
}
}
else
{
System.Diagnostics.Debug.WriteLine("Caller is not a box widget.");
}
}
void AddConeToWindow(vtk.vtkRenderWindow renWin)
{
//
// Next we create an instance of vtkConeSource and set some of its
// properties. The instance of vtkConeSource "cone" is part of a visualization
// pipeline (it is a source process object); it produces data (output type is
// vtkPolyData) which other filters may process.
//
vtk.vtkConeSource cone = new vtk.vtkConeSource();
cone.SetHeight(3.0f);
cone.SetRadius(1.0f);
cone.SetResolution(10);
//
// In this example we terminate the pipeline with a mapper process object.
// (Intermediate filters such as vtkShrinkPolyData could be inserted in
// between the source and the mapper.) We create an instance of
// vtkPolyDataMapper to map the polygonal data into graphics primitives. We
// connect the output of the cone souece to the input of this mapper.
//
vtk.vtkPolyDataMapper coneMapper = new vtk.vtkPolyDataMapper();
coneMapper.SetInput(cone.GetOutput());
//
// Create an actor to represent the cone. The actor orchestrates rendering of
// the mapper's graphics primitives. An actor also refers to properties via a
// vtkProperty instance, and includes an internal transformation matrix. We
// set this actor's mapper to be coneMapper which we created above.
//
vtk.vtkActor coneActor = new vtk.vtkActor();
coneActor.SetMapper(coneMapper);
//
// Create the Renderer and assign actors to it. A renderer is like a
// viewport. It is part or all of a window on the screen and it is
// responsible for drawing the actors it has. We also set the background
// color here
//
vtk.vtkRenderer ren1 = new vtk.vtkRenderer();
ren1.AddActor(coneActor);
ren1.SetBackground(0.1f, 0.2f, 0.4f);
//
// Finally we create the render window which will show up on the screen
// We put our renderer into the render window using AddRenderer. We also
// set the size to be 300 pixels by 300
//
renWin.AddRenderer(ren1);
vtk.vtkRenderWindowInteractor iren = renWin.GetInteractor();
{
m_boxWidget = new vtk.vtkBoxWidget();
m_boxWidget.SetInteractor(iren);
m_boxWidget.SetPlaceFactor(1.25f);
m_boxWidget.SetProp3D(coneActor);
m_boxWidget.PlaceWidget();
m_boxWidget.AddObserver((uint)vtk.EventIds.InteractionEvent,
new vtk.vtkDotNetCallback(myCallback));
m_boxWidget.On();
}
}