MoveCamera

vtk-examples/Java/Visualization/MoveCamera

Description¶

This example creates two spheres. They will move together when the mouse is used to interact with the scene because the camera is actually what is moving causing the view of the spheres to change.

Other languages

See (Cxx)

Question

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Code¶

MoveCamera.java

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

public class MoveCamera
{
  // -----------------------------------------------------------------
  // 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("White", Bgcolor);

    //Sphere1
    vtkSphereSource sphereSource1 = new vtkSphereSource();
    sphereSource1.SetCenter(0.0, 0.0, 0.0 );
    sphereSource1.SetRadius(4.0);
    sphereSource1.Update();

    vtkPolyDataMapper sphereMapper1  = new vtkPolyDataMapper();
    sphereMapper1 .SetInputData (sphereSource1.GetOutput());

    vtkActor sphereActor1 = new vtkActor();
    sphereActor1.SetMapper(sphereMapper1);

    //Sphere2
    vtkSphereSource sphereSource2 = new vtkSphereSource();
    sphereSource2.SetCenter(10.0, 0.0, 0.0 );
    sphereSource2.SetRadius(3.0);
    sphereSource2.Update();

    vtkPolyDataMapper sphereMapper2  = new vtkPolyDataMapper();
    sphereMapper2 .SetInputData (sphereSource2.GetOutput());

    vtkActor sphereActor2 = new vtkActor();
    sphereActor2.SetMapper(sphereMapper2);

    // 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(sphereActor1);
    ren.AddActor(sphereActor2);

    ren.SetBackground(Bgcolor);

    renWin.SetSize(640, 480);
    renWin.Render();

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

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