TrackballActor

VTKExamples/Java/Interaction/TrackballActor


Description

This example shows how to visualize data in "trackball" mode. That is, click and drag actors is the way to interact.

Contrast this with TrackballCamera.

Other Languages

See (Cxx)

Code

TrackballActor.java

import vtk.vtkActor;
import vtk.vtkNamedColors;
import vtk.vtkNativeLibrary;
import vtk.vtkPolyDataMapper;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkSphereSource;
import vtk.vtkConeSource;
import vtk.vtkInteractorStyleTrackballActor;

public class TrackballActor 
{
  // -----------------------------------------------------------------
  // Load VTK library and print which library was not properly loaded
  static 
  {
    if (!vtkNativeLibrary.LoadAllNativeLibraries()) 
    {
      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) 
      {
        if (!lib.IsLoaded()) 
        {
          System.out.println(lib.GetLibraryName() + " not loaded");
        }
      }
    }
    vtkNativeLibrary.DisableOutputWindow(null);
  }
  // -----------------------------------------------------------------

  public static void main(String args[]) 
  {
    vtkNamedColors colors = new vtkNamedColors();

    //Renderer Background Color
    double Bgcolor[] = new double[4];

    colors.GetColor("SteelBlue", Bgcolor);

    // Create a sphere
    vtkSphereSource sphereSource = new vtkSphereSource();
    sphereSource.SetCenter(1.0, 0.0, 0.0 );
    sphereSource.Update();

    vtkPolyDataMapper sphereMapper  = new vtkPolyDataMapper();
    sphereMapper .SetInputData (sphereSource.GetOutput());

    vtkActor sphereActor = new vtkActor();
    sphereActor.SetMapper(sphereMapper);

    // Create a Cone
    vtkConeSource ConeSource = new vtkConeSource();

    vtkPolyDataMapper coneMapper = new vtkPolyDataMapper();
    coneMapper.SetInputConnection(ConeSource.GetOutputPort());

    vtkActor coneActor  = new vtkActor();
    coneActor.SetMapper(coneMapper);

    // Create the renderer, render window and interactor.
    vtkRenderer ren = new vtkRenderer();
    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren);
    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
    iren.SetRenderWindow(renWin);

    // Visualise
    ren.AddActor(sphereActor);
    ren.AddActor(coneActor);

    ren.SetBackground(Bgcolor);

    renWin.SetWindowName("Trackball Actor");
    renWin.SetSize(300, 300);
    renWin.Render();

    vtkInteractorStyleTrackballActor style = new vtkInteractorStyleTrackballActor();
    iren.SetInteractorStyle(style);

    iren.Initialize();
    iren.Start();
   }
}