SpotLight

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.vtkLight;
import vtk.vtkNativeLibrary;
import vtk.vtkPanel;
import vtk.vtkPolyDataMapper;
import vtk.vtkPlaneSource;
import vtk.vtkNamedColors;


public class SpotLight 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 SpotLight() {
        super(new BorderLayout());


       vtkNamedColors Color = new vtkNamedColors(); 
       //For greenLight 
       double greenLightColor[] = new double[4];
       //For PinkLight 
       double pinkLightColor[] = new double[4];
       //Renderer Background Color
       double BgColor[] = new double[4];
       //Renderer Background1 Color
       double BgColor2[] = new double[4];


       //Change Color Name to Use your own Color 
       Color.GetColor("Lawn_green",greenLightColor);
       //Change Color Name to Use your own Color 
       Color.GetColor("DeepPink",pinkLightColor);
       //Change Color Name to Use your own Color for Renderer Background
       Color.GetColor("RoyalBlue",BgColor);
     //Change Color Name to Use your own Color for Renderer Background1
       Color.GetColor("SkyBlue",BgColor2);

      vtkPlaneSource PlaneSource = new vtkPlaneSource();
      PlaneSource.SetOrigin(-5.0, 0.0, 5.0);
      PlaneSource.SetPoint1(5.0, 0.0, 5.0);
      PlaneSource.SetPoint2(-5.0, 0.0, -5.0);
      PlaneSource.SetResolution(100, 100);

      vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
      Mapper.SetInputConnection(PlaneSource.GetOutputPort());

      vtkActor Actor = new vtkActor();
      Actor.SetMapper(Mapper);




      vtkLight greenLight = new vtkLight();
      greenLight.PositionalOn();
      greenLight.SetPosition(-4.0, 4.0, -1.0);
      greenLight.SetColor(greenLightColor);
      greenLight.SetIntensity(0.5);


      vtkLight pinkLight = new vtkLight();
      pinkLight.PositionalOn();
      pinkLight.SetPosition(4.0, 5.0,1.0);
      pinkLight.SetColor(pinkLightColor);
      pinkLight.SetIntensity(0.6);


      renWin = new vtkPanel();
      renWin.GetRenderer().AddActor(Actor);
      renWin.GetRenderer().SetBackground(BgColor);
      renWin.GetRenderer().SetBackground2(BgColor2);
      renWin.GetRenderer().AddLight(greenLight);
      renWin.GetRenderer().AddLight(pinkLight);
      renWin.setSize(640,480);
      renWin.resetCamera();
      renWin.GetRenderer().GetActiveCamera().Azimuth(40);
      renWin.GetRenderer().GetActiveCamera().Elevation(30);
      renWin.resetCameraClippingRange();

      // 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("Spot Light");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.getContentPane().setLayout(new BorderLayout());
            frame.getContentPane().add(new SpotLight(), BorderLayout.CENTER);
            frame.setSize(400, 400);
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);
          }
        });
      }
    }