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//
// This example introduces the concepts of user interaction with VTK.
// First, a different interaction style (than the default) is defined.
// Second, the interaction is started.
//
//
// we import the vtk wrapped classes forst
import vtk.*;
// then we define our class
public class Cone5 {
// in the static contructor we load in the native code
// The libraries must be in your path to work
static {
System.loadLibrary("vtkCommonJava");
System.loadLibrary("vtkFilteringJava");
System.loadLibrary("vtkIOJava");
System.loadLibrary("vtkImagingJava");
System.loadLibrary("vtkGraphicsJava");
System.loadLibrary("vtkRenderingJava");
}
// now the main program
public static void main (String []args) throws Exception {
//
// 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.
//
vtkConeSource cone = new vtkConeSource();
cone.SetHeight( 3.0 );
cone.SetRadius( 1.0 );
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.
//
vtkPolyDataMapper coneMapper = new vtkPolyDataMapper();
coneMapper.SetInputConnection(cone.GetOutputPort());
//
// 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.
//
vtkActor coneActor = new 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.
//
vtkRenderer ren1 = new vtkRenderer();
ren1.AddActor(coneActor);
ren1.SetBackground(0.1, 0.2, 0.4);
//
// Finally we create the render window which will show up on the screen.
// We add our two renderers into the render window using AddRenderer. We also
// set the size to be 600 pixels by 300.
//
vtkRenderWindow renWin = new vtkRenderWindow();
renWin.AddRenderer( ren1 );
renWin.SetSize(300, 300);
//
// Make one camera view 90 degrees from other.
//
ren1.ResetCamera();
ren1.GetActiveCamera().Azimuth(90);
//
// The vtkRenderWindowInteractor class watches for events (e.g., keypress,
// mouse) in the vtkRenderWindow. These events are translated into event
// invocations that VTK understands (see VTK/Common/vtkCommand.h for all
// events that VTK processes). Then observers of these VTK events can
// process them as appropriate.
vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
iren.SetRenderWindow(renWin);
//
// By default the vtkRenderWindowInteractor instantiates an instance
// of vtkInteractorStyle. vtkInteractorStyle translates a set of events
// it observes into operations on the camera, actors, and/or properties
// in the vtkRenderWindow associated with the vtkRenderWinodwInteractor.
// Here we specify a particular interactor style.
vtkInteractorStyleTrackballCamera style =
new vtkInteractorStyleTrackballCamera();
iren.SetInteractorStyle(style);
//
// Unlike the previous examples where we performed some operations and then
// exited, here we leave an event loop running. The user can use the mouse
// and keyboard to perform the operations on the scene according to the
// current interaction style.
//
//
// Initialize and start the event loop. Once the render window appears,
// mouse in the window to move the camera. The Start() method executes
// an event loop which listens to user mouse and keyboard events. Note
// that keypress-e exits the event loop. (Look in vtkInteractorStyle.h
// for a summary of events, or the appropriate Doxygen documentation.)
//
iren.Initialize();
iren.Start();
}
}
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