# Disk

VTKExamples/Java/GeometricObjects/Disk

Java Program to visualize a Disk

Author: Bharatesh Chakravarthi Affiliation: VE Lab, Chung Ang University, Seoul, South Korea.

### Code

Disk.java

    import java.awt.BorderLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.SwingUtilities;

    import vtk.vtkActor;
    import vtk.vtkNativeLibrary;
    import vtk.vtkPanel;
    import vtk.vtkPolyDataMapper;
    import vtk.vtkDiskSource;

    //Author: Bharatesh Chakravarthi
    //Affiliation: VE Lab, Chung Ang University, Seoul, South Korea.

    public class Disk extends JPanel implements ActionListener
    {
          private static final long serialVersionUID = 1L;
          private vtkPanel renWin;
          private JButton exitButton;

          // -----------------------------------------------------------------
          // 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 Disk()
          {

                super(new BorderLayout());

              //Create a Disk
              vtkDiskSource Disk = new vtkDiskSource();

              //Create a Mapper and Actor
              vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
              Mapper.SetInputConnection(Disk.GetOutputPort());

              vtkActor Actor = new vtkActor();
              Actor.SetMapper(Mapper);
              Actor.GetProperty().SetColor(1.0, 1.0, 0.5);

              renWin = new vtkPanel();
              renWin.GetRenderer().AddActor(Actor);
              renWin.GetRenderer().SetBackground(0.1, 0.0, 0.1);
              renWin.resetCamera();

              // Add Java UI components
              exitButton = new JButton("Exit");
              exitButton.addActionListener(this);

              add(renWin, BorderLayout.CENTER);
              add(exitButton, BorderLayout.SOUTH);
          }

          /** An ActionListener that listens to the button. */
          public void actionPerformed(ActionEvent e)
          {
            if (e.getSource().equals(exitButton))
            {
              System.exit(0);
            }
          }

          public static void main(String s[])
          {
            SwingUtilities.invokeLater(new Runnable()
            {
              public void run()
              {
                JFrame frame = new JFrame("Disk");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.getContentPane().setLayout(new BorderLayout());
                frame.getContentPane().add(new Disk(), BorderLayout.CENTER);
                frame.setSize(400, 400);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
              }
            });
          }
    }