TrackballCamera

VTKExamples/Java/Interaction/TrackballCamera


Description

This example demonstrates the trackball camera mode. When the mouse is clicked and dragged from anywhere in the window, the camera is modified.

Contrast this with TrackballActor.

Other Languages

See (Cxx)

Question

If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code

TrackballCamera.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.vtkInteractorStyleTrackballCamera;

public class TrackballCamera 
{
  // -----------------------------------------------------------------
  // 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 Camera");
    renWin.SetSize(300, 300);
    renWin.Render();

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

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