Просмотр исходного текста страницы Java/3D/Text 3D

== ExText - illustrate use of 3D text ==






   
  <!-- start source code -->
   
    <source lang="java">

//
//CLASS
//ExText - illustrate use of 3D text
//
//LESSON
//Use Text3D to define Shape3D geometry
//
//AUTHOR
//David R. Nadeau / San Diego Supercomputer Center
//
import java.applet.Applet;
import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.CheckboxMenuItem;
import java.awt.ruponent;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GraphicsEnvironment;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.File;
import java.util.Enumeration;
import java.util.EventListener;
import javax.media.j3d.Appearance;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Font3D;
import javax.media.j3d.FontExtrusion;
import javax.media.j3d.Group;
import javax.media.j3d.Light;
import javax.media.j3d.Material;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Text3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.WakeupCriterion;
import javax.media.j3d.WakeupOnAWTEvent;
import javax.media.j3d.WakeupOnElapsedFrames;
import javax.media.j3d.WakeupOr;
import javax.vecmath.Color3f;
import javax.vecmath.Matrix4d;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;
import com.sun.j3d.utils.universe.PlatformGeometry;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.Viewer;
import com.sun.j3d.utils.universe.ViewingPlatform;
public class ExText extends Java3DFrame {
  //--------------------------------------------------------------
  //  SCENE CONTENT
  //--------------------------------------------------------------
  //
  //  Nodes (updated via menu)
  //
  private FontExtrusion extrusion = null;
  private Shape3D shape = null;
  private Group scene = null;
  private BranchGroup textGroup = null;
  //
  //  Build scene
  //
  public Group buildScene() {
    // Get the current font attributes
    Font font = (Font) fonts[currentFont].value;
    String textString = (String) fonts[currentFont].name;
    // Turn on the example headlight
    setHeadlightEnable(true);
    // Build the scene group
    scene = new Group();
    scene.setCapability(Group.ALLOW_CHILDREN_EXTEND);
    scene.setCapability(Group.ALLOW_CHILDREN_WRITE);
    // Build a branch group to hold the text shape
    // (this allows us to remove the text shape later,
    // change it, then put it back, all under menu control)
    textGroup = new BranchGroup();
    textGroup.setCapability(BranchGroup.ALLOW_DETACH);
    scene.addChild(textGroup);
    // BEGIN EXAMPLE TOPIC
    // Create a font extrusion with a default extrusion shape
    extrusion = new FontExtrusion();
    // Define a 3D font with a default extrusion path
    Font3D font3d = new Font3D(font, extrusion);
    // Build 3D text geometry using the 3D font
    Text3D tex = new Text3D();
    tex.setFont3D(font3d);
    tex.setString(textString);
    tex.setAlignment(Text3D.ALIGN_CENTER);
    // Define a generic shaded appearance
    Appearance app = new Appearance();
    Material mat = new Material();
    mat.setLightingEnable(true);
    app.setMaterial(mat);
    // Assemble geometry and appearance into a shape
    // and add it to the scene
    shape = new Shape3D(tex, app);
    shape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
    textGroup.addChild(shape);
    // END EXAMPLE TOPIC
    return scene;
  }
  //--------------------------------------------------------------
  //  USER INTERFACE
  //--------------------------------------------------------------
  //
  //  Main
  //
  public static void main(String[] args) {
    ExText ex = new ExText();
    ex.initialize(args);
    ex.buildUniverse();
    ex.showFrame();
  }
  //  Font menu choices
  private NameValue[] fonts = null;
  private int currentFont = 0;
  private CheckboxMenu fontMenu = null;
  //
  //  Initialize the GUI (application and applet)
  //
  public void initialize(String[] args) {
    // Initialize the window, menubar, etc.
    super.initialize(args);
    exampleFrame.setTitle("Java 3D Text Example");
    //
    //  Add a menubar menu to change node parameters
    //    Font -->
    //
    Menu m = new Menu("Font3D");
    // Get a list of available fonts
    GraphicsEnvironment ge = GraphicsEnvironment
        .getLocalGraphicsEnvironment();
    String[] fontNames = ge.getAvailableFontFamilyNames();
    fonts = new NameValue[fontNames.length];
    Font newFont = null;
    // Add those fonts to a list and build the font menu
    if (debug)
      System.err.println("Loading fonts...");
    for (int i = 0; i < fontNames.length; i++) {
      if (debug)
        System.err.println("  " + fontNames[i]);
      newFont = new Font(fontNames[i], Font.PLAIN, 1);
      fonts[i] = new NameValue(fontNames[i], newFont);
    }
    fontMenu = new CheckboxMenu("Font", fonts, currentFont, this);
    m.add(fontMenu);
    exampleMenuBar.add(m);
  }
  //
  //  Handle checkboxes and menu choices
  //
  public void checkboxChanged(CheckboxMenu menu, int check) {
    if (menu == fontMenu) {
      // Change the 2D font used to build a 3D font
      currentFont = check;
      String fontName = (String) fonts[currentFont].name;
      Font font = (Font) fonts[currentFont].value;
      Font3D font3d = new Font3D(font, extrusion);
      Text3D tex = new Text3D();
      tex.setFont3D(font3d);
      tex.setString(fontName);
      tex.setAlignment(Text3D.ALIGN_CENTER);
      scene.removeChild(0);
      shape.setGeometry(tex);
      scene.addChild(textGroup);
      if (debug)
        System.err.println("Font set to " + fontName);
      return;
    }
    // Handle all other checkboxes
    super.checkboxChanged(menu, check);
  }
}
/**
 * The Example class is a base class extended by example applications. The class
 * provides basic features to create a top-level frame, add a menubar and
 * Canvas3D, build the universe, set up "examine" and "walk" style navigation
 * behaviors, and provide hooks so that subclasses can add 3D content to the
 * example"s universe.
 * <P>
 * Using this Example class simplifies the construction of example applications,
 * enabling the author to focus upon 3D content and not the busywork of creating
 * windows, menus, and universes.
 * 
 * @version 1.0, 98/04/16
 * @author David R. Nadeau, San Diego Supercomputer Center
 */
class Java3DFrame extends Applet implements WindowListener, ActionListener,
    ItemListener, CheckboxMenuListener {
  //  Navigation types
  public final static int Walk = 0;
  public final static int Examine = 1;
  //  Should the scene be compiled?
  private boolean shouldCompile = true;
  //  GUI objects for our subclasses
  protected Java3DFrame example = null;
  protected Frame exampleFrame = null;
  protected MenuBar exampleMenuBar = null;
  protected Canvas3D exampleCanvas = null;
  protected TransformGroup exampleViewTransform = null;
  protected TransformGroup exampleSceneTransform = null;
  protected boolean debug = false;
  //  Private GUI objects and state
  private boolean headlightOnOff = true;
  private int navigationType = Examine;
  private CheckboxMenuItem headlightMenuItem = null;
  private CheckboxMenuItem walkMenuItem = null;
  private CheckboxMenuItem examineMenuItem = null;
  private DirectionalLight headlight = null;
  private ExamineViewerBehavior examineBehavior = null;
  private WalkViewerBehavior walkBehavior = null;
  //--------------------------------------------------------------
  //  ADMINISTRATION
  //--------------------------------------------------------------
  /**
   * The main program entry point when invoked as an application. Each example
   * application that extends this class must define their own main.
   * 
   * @param args
   *            a String array of command-line arguments
   */
  public static void main(String[] args) {
    Java3DFrame ex = new Java3DFrame();
    ex.initialize(args);
    ex.buildUniverse();
    ex.showFrame();
  }
  /**
   * Constructs a new Example object.
   * 
   * @return a new Example that draws no 3D content
   */
  public Java3DFrame() {
    // Do nothing
  }
  /**
   * Initializes the application when invoked as an applet.
   */
  public void init() {
    // Collect properties into String array
    String[] args = new String[2];
    // NOTE: to be done still...
    this.initialize(args);
    this.buildUniverse();
    this.showFrame();
    // NOTE: add something to the browser page?
  }
  /**
   * Initializes the Example by parsing command-line arguments, building an
   * AWT Frame, constructing a menubar, and creating the 3D canvas.
   * 
   * @param args
   *            a String array of command-line arguments
   */
  protected void initialize(String[] args) {
    example = this;
    // Parse incoming arguments
    parseArgs(args);
    // Build the frame
    if (debug)
      System.err.println("Building GUI...");
    exampleFrame = new Frame();
    exampleFrame.setSize(640, 480);
    exampleFrame.setTitle("Java 3D Example");
    exampleFrame.setLayout(new BorderLayout());
    // Set up a close behavior
    exampleFrame.addWindowListener(this);
    // Create a canvas
    exampleCanvas = new Canvas3D(null);
    exampleCanvas.setSize(630, 460);
    exampleFrame.add("Center", exampleCanvas);
    // Build the menubar
    exampleMenuBar = this.buildMenuBar();
    exampleFrame.setMenuBar(exampleMenuBar);
    // Pack
    exampleFrame.pack();
    exampleFrame.validate();
    //    exampleFrame.setVisible( true );
  }
  /**
   * Parses incoming command-line arguments. Applications that subclass this
   * class may override this method to support their own command-line
   * arguments.
   * 
   * @param args
   *            a String array of command-line arguments
   */
  protected void parseArgs(String[] args) {
    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-d"))
        debug = true;
    }
  }
  //--------------------------------------------------------------
  //  SCENE CONTENT
  //--------------------------------------------------------------
  /**
   * Builds the 3D universe by constructing a virtual universe (via
   * SimpleUniverse), a view platform (via SimpleUniverse), and a view (via
   * SimpleUniverse). A headlight is added and a set of behaviors initialized
   * to handle navigation types.
   */
  protected void buildUniverse() {
    //
    //  Create a SimpleUniverse object, which builds:
    //
    //    - a Locale using the given hi-res coordinate origin
    //
    //    - a ViewingPlatform which in turn builds:
    //          - a MultiTransformGroup with which to move the
    //            the ViewPlatform about
    //
    //          - a ViewPlatform to hold the view
    //
    //          - a BranchGroup to hold avatar geometry (if any)
    //
    //          - a BranchGroup to hold view platform
    //            geometry (if any)
    //
    //    - a Viewer which in turn builds:
    //          - a PhysicalBody which characterizes the user"s
    //            viewing preferences and abilities
    //
    //          - a PhysicalEnvironment which characterizes the
    //            user"s rendering hardware and software
    //
    //          - a JavaSoundMixer which initializes sound
    //            support within the 3D environment
    //
    //          - a View which renders the scene into a Canvas3D
    //
    //  All of these actions could be done explicitly, but
    //  using the SimpleUniverse utilities simplifies the code.
    //
    if (debug)
      System.err.println("Building scene graph...");
    SimpleUniverse universe = new SimpleUniverse(null, // Hi-res coordinate
        // for the origin -
        // use default
        1, // Number of transforms in MultiTransformGroup
        exampleCanvas, // Canvas3D into which to draw
        null); // URL for user configuration file - use defaults
    //
    //  Get the viewer and create an audio device so that
    //  sound will be enabled in this content.
    //
    Viewer viewer = universe.getViewer();
    viewer.createAudioDevice();
    //
    //  Get the viewing platform created by SimpleUniverse.
    //  From that platform, get the inner-most TransformGroup
    //  in the MultiTransformGroup. That inner-most group
    //  contains the ViewPlatform. It is this inner-most
    //  TransformGroup we need in order to:
    //
    //    - add a "headlight" that always aims forward from
    //       the viewer
    //
    //    - change the viewing direction in a "walk" style
    //
    //  The inner-most TransformGroup"s transform will be
    //  changed by the walk behavior (when enabled).
    //
    ViewingPlatform viewingPlatform = universe.getViewingPlatform();
    exampleViewTransform = viewingPlatform.getViewPlatformTransform();
    //
    //  Create a "headlight" as a forward-facing directional light.
    //  Set the light"s bounds to huge. Since we want the light
    //  on the viewer"s "head", we need the light within the
    //  TransformGroup containing the ViewPlatform. The
    //  ViewingPlatform class creates a handy hook to do this
    //  called "platform geometry". The PlatformGeometry class is
    //  subclassed off of BranchGroup, and is intended to contain
    //  a description of the 3D platform itself... PLUS a headlight!
    //  So, to add the headlight, create a new PlatformGeometry group,
    //  add the light to it, then add that platform geometry to the
    //  ViewingPlatform.
    //
    BoundingSphere allBounds = new BoundingSphere(
        new Point3d(0.0, 0.0, 0.0), 100000.0);
    PlatformGeometry pg = new PlatformGeometry();
    headlight = new DirectionalLight();
    headlight.setColor(White);
    headlight.setDirection(new Vector3f(0.0f, 0.0f, -1.0f));
    headlight.setInfluencingBounds(allBounds);
    headlight.setCapability(Light.ALLOW_STATE_WRITE);
    pg.addChild(headlight);
    viewingPlatform.setPlatformGeometry(pg);
    //
    //  Create the 3D content BranchGroup, containing:
    //
    //    - a TransformGroup who"s transform the examine behavior
    //      will change (when enabled).
    //
    //    - 3D geometry to view
    //
    // Build the scene root
    BranchGroup sceneRoot = new BranchGroup();
    // Build a transform that we can modify
    exampleSceneTransform = new TransformGroup();
    exampleSceneTransform
        .setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    exampleSceneTransform
        .setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    exampleSceneTransform.setCapability(Group.ALLOW_CHILDREN_EXTEND);
    //
    //  Build the scene, add it to the transform, and add
    //  the transform to the scene root
    //
    if (debug)
      System.err.println("  scene...");
    Group scene = this.buildScene();
    exampleSceneTransform.addChild(scene);
    sceneRoot.addChild(exampleSceneTransform);
    //
    //  Create a pair of behaviors to implement two navigation
    //  types:
    //
    //    - "examine": a style where mouse drags rotate about
    //      the scene"s origin as if it is an object under
    //      examination. This is similar to the "Examine"
    //      navigation type used by VRML browsers.
    //
    //    - "walk": a style where mouse drags rotate about
    //      the viewer"s center as if the viewer is turning
    //      about to look at a scene they are in. This is
    //      similar to the "Walk" navigation type used by
    //      VRML browsers.
    //
    //  Aim the examine behavior at the scene"s TransformGroup
    //  and add the behavior to the scene root.
    //
    //  Aim the walk behavior at the viewing platform"s
    //  TransformGroup and add the behavior to the scene root.
    //
    //  Enable one (and only one!) of the two behaviors
    //  depending upon the current navigation type.
    //
    examineBehavior = new ExamineViewerBehavior(exampleSceneTransform, // Transform
        // gorup
        // to
        // modify
        exampleFrame); // Parent frame for cusor changes
    examineBehavior.setSchedulingBounds(allBounds);
    sceneRoot.addChild(examineBehavior);
    walkBehavior = new WalkViewerBehavior(exampleViewTransform, // Transform
        // group to
        // modify
        exampleFrame); // Parent frame for cusor changes
    walkBehavior.setSchedulingBounds(allBounds);
    sceneRoot.addChild(walkBehavior);
    if (navigationType == Walk) {
      examineBehavior.setEnable(false);
      walkBehavior.setEnable(true);
    } else {
      examineBehavior.setEnable(true);
      walkBehavior.setEnable(false);
    }
    //
    //  Compile the scene branch group and add it to the
    //  SimpleUniverse.
    //
    if (shouldCompile)
      sceneRoot.rupile();
    universe.addBranchGraph(sceneRoot);
    reset();
  }
  /**
   * Builds the scene. Example application subclasses should replace this
   * method with their own method to build 3D content.
   * 
   * @return a Group containing 3D content to display
   */
  public Group buildScene() {
    // Build the scene group containing nothing
    Group scene = new Group();
    return scene;
  }
  //--------------------------------------------------------------
  //  SET/GET METHODS
  //--------------------------------------------------------------
  /**
   * Sets the headlight on/off state. The headlight faces forward in the
   * direction the viewer is facing. Example applications that add their own
   * lights will typically turn the headlight off. A standard menu item
   * enables the headlight to be turned on and off via user control.
   * 
   * @param onOff
   *            a boolean turning the light on (true) or off (false)
   */
  public void setHeadlightEnable(boolean onOff) {
    headlightOnOff = onOff;
    if (headlight != null)
      headlight.setEnable(headlightOnOff);
    if (headlightMenuItem != null)
      headlightMenuItem.setState(headlightOnOff);
  }
  /**
   * Gets the headlight on/off state.
   * 
   * @return a boolean indicating if the headlight is on or off
   */
  public boolean getHeadlightEnable() {
    return headlightOnOff;
  }
  /**
   * Sets the navigation type to be either Examine or Walk. The Examine
   * navigation type sets up behaviors that use mouse drags to rotate and
   * translate scene content as if it is an object held at arm"s length and
   * under examination. The Walk navigation type uses mouse drags to rotate
   * and translate the viewer as if they are walking through the content. The
   * Examine type is the default.
   * 
   * @param nav
   *            either Walk or Examine
   */
  public void setNavigationType(int nav) {
    if (nav == Walk) {
      navigationType = Walk;
      if (walkMenuItem != null)
        walkMenuItem.setState(true);
      if (examineMenuItem != null)
        examineMenuItem.setState(false);
      if (walkBehavior != null)
        walkBehavior.setEnable(true);
      if (examineBehavior != null)
        examineBehavior.setEnable(false);
    } else {
      navigationType = Examine;
      if (walkMenuItem != null)
        walkMenuItem.setState(false);
      if (examineMenuItem != null)
        examineMenuItem.setState(true);
      if (walkBehavior != null)
        walkBehavior.setEnable(false);
      if (examineBehavior != null)
        examineBehavior.setEnable(true);
    }
  }
  /**
   * Gets the current navigation type, returning either Walk or Examine.
   * 
   * @return either Walk or Examine
   */
  public int getNavigationType() {
    return navigationType;
  }
  /**
   * Sets whether the scene graph should be compiled or not. Normally this is
   * always a good idea. For some example applications that use this Example
   * framework, it is useful to disable compilation - particularly when nodes
   * and node components will need to be made un-live in order to make
   * changes. Once compiled, such components can be made un-live, but they are
   * still unchangable unless appropriate capabilities have been set.
   * 
   * @param onOff
   *            a boolean turning compilation on (true) or off (false)
   */
  public void setCompilable(boolean onOff) {
    shouldCompile = onOff;
  }
  /**
   * Gets whether the scene graph will be compiled or not.
   * 
   * @return a boolean indicating if scene graph compilation is on or off
   */
  public boolean getCompilable() {
    return shouldCompile;
  }
  //These methods will be replaced
  //  Set the view position and direction
  public void setViewpoint(Point3f position, Vector3f direction) {
    Transform3D t = new Transform3D();
    t.set(new Vector3f(position));
    exampleViewTransform.setTransform(t);
    // how to set direction?
  }
  //  Reset transforms
  public void reset() {
    Transform3D trans = new Transform3D();
    exampleSceneTransform.setTransform(trans);
    trans.set(new Vector3f(0.0f, 0.0f, 10.0f));
    exampleViewTransform.setTransform(trans);
    setNavigationType(navigationType);
  }
  //
  //  Gets the URL (with file: prepended) for the current directory.
  //  This is a terrible hack needed in the Alpha release of Java3D
  //  in order to build a full path URL for loading sounds with
  //  MediaContainer. When MediaContainer is fully implemented,
  //  it should handle relative path names, but not yet.
  //
  public String getCurrentDirectory() {
    // Create a bogus file so that we can query it"s path
    File dummy = new File("dummy.tmp");
    String dummyPath = dummy.getAbsolutePath();
    // strip "/dummy.tmp" from end of dummyPath and put into "path"
    if (dummyPath.endsWith(File.separator + "dummy.tmp")) {
      int index = dummyPath.lastIndexOf(File.separator + "dummy.tmp");
      if (index >= 0) {
        int pathLength = index + 5; // pre-pend "file:"
        char[] charPath = new char[pathLength];
        dummyPath.getChars(0, index, charPath, 5);
        String path = new String(charPath, 0, pathLength);
        path = "file:" + path.substring(5, pathLength);
        return path + File.separator;
      }
    }
    return dummyPath + File.separator;
  }
  //--------------------------------------------------------------
  //  USER INTERFACE
  //--------------------------------------------------------------
  /**
   * Builds the example AWT Frame menubar. Standard menus and their options
   * are added. Applications that subclass this class should build their
   * menubar additions within their initialize method.
   * 
   * @return a MenuBar for the AWT Frame
   */
  private MenuBar buildMenuBar() {
    // Build the menubar
    MenuBar menuBar = new MenuBar();
    // File menu
    Menu m = new Menu("File");
    m.addActionListener(this);
    m.add("Exit");
    menuBar.add(m);
    // View menu
    m = new Menu("View");
    m.addActionListener(this);
    m.add("Reset view");
    m.addSeparator();
    walkMenuItem = new CheckboxMenuItem("Walk");
    walkMenuItem.addItemListener(this);
    m.add(walkMenuItem);
    examineMenuItem = new CheckboxMenuItem("Examine");
    examineMenuItem.addItemListener(this);
    m.add(examineMenuItem);
    if (navigationType == Walk) {
      walkMenuItem.setState(true);
      examineMenuItem.setState(false);
    } else {
      walkMenuItem.setState(false);
      examineMenuItem.setState(true);
    }
    m.addSeparator();
    headlightMenuItem = new CheckboxMenuItem("Headlight on/off");
    headlightMenuItem.addItemListener(this);
    headlightMenuItem.setState(headlightOnOff);
    m.add(headlightMenuItem);
    menuBar.add(m);
    return menuBar;
  }
  /**
   * Shows the application"s frame, making it and its menubar, 3D canvas, and
   * 3D content visible.
   */
  public void showFrame() {
    exampleFrame.show();
  }
  /**
   * Quits the application.
   */
  public void quit() {
    System.exit(0);
  }
  /**
   * Handles menu selections.
   * 
   * @param event
   *            an ActionEvent indicating what menu action requires handling
   */
  public void actionPerformed(ActionEvent event) {
    String arg = event.getActionCommand();
    if (arg.equals("Reset view"))
      reset();
    else if (arg.equals("Exit"))
      quit();
  }
  /**
   * Handles checkbox items on a CheckboxMenu. The Example class has none of
   * its own, but subclasses may have some.
   * 
   * @param menu
   *            which CheckboxMenu needs action
   * @param check
   *            which CheckboxMenu item has changed
   */
  public void checkboxChanged(CheckboxMenu menu, int check) {
    // None for us
  }
  /**
   * Handles on/off checkbox items on a standard menu.
   * 
   * @param event
   *            an ItemEvent indicating what requires handling
   */
  public void itemStateChanged(ItemEvent event) {
    Object src = event.getSource();
    boolean state;
    if (src == headlightMenuItem) {
      state = headlightMenuItem.getState();
      headlight.setEnable(state);
    } else if (src == walkMenuItem)
      setNavigationType(Walk);
    else if (src == examineMenuItem)
      setNavigationType(Examine);
  }
  /**
   * Handles a window closing event notifying the application that the user
   * has chosen to close the application without selecting the "Exit" menu
   * item.
   * 
   * @param event
   *            a WindowEvent indicating the window is closing
   */
  public void windowClosing(WindowEvent event) {
    quit();
  }
  public void windowClosed(WindowEvent event) {
  }
  public void windowOpened(WindowEvent event) {
  }
  public void windowIconified(WindowEvent event) {
  }
  public void windowDeiconified(WindowEvent event) {
  }
  public void windowActivated(WindowEvent event) {
  }
  public void windowDeactivated(WindowEvent event) {
  }
  //  Well known colors, positions, and directions
  public final static Color3f White = new Color3f(1.0f, 1.0f, 1.0f);
  public final static Color3f Gray = new Color3f(0.7f, 0.7f, 0.7f);
  public final static Color3f DarkGray = new Color3f(0.2f, 0.2f, 0.2f);
  public final static Color3f Black = new Color3f(0.0f, 0.0f, 0.0f);
  public final static Color3f Red = new Color3f(1.0f, 0.0f, 0.0f);
  public final static Color3f DarkRed = new Color3f(0.3f, 0.0f, 0.0f);
  public final static Color3f Yellow = new Color3f(1.0f, 1.0f, 0.0f);
  public final static Color3f DarkYellow = new Color3f(0.3f, 0.3f, 0.0f);
  public final static Color3f Green = new Color3f(0.0f, 1.0f, 0.0f);
  public final static Color3f DarkGreen = new Color3f(0.0f, 0.3f, 0.0f);
  public final static Color3f Cyan = new Color3f(0.0f, 1.0f, 1.0f);
  public final static Color3f Blue = new Color3f(0.0f, 0.0f, 1.0f);
  public final static Color3f DarkBlue = new Color3f(0.0f, 0.0f, 0.3f);
  public final static Color3f Magenta = new Color3f(1.0f, 0.0f, 1.0f);
  public final static Vector3f PosX = new Vector3f(1.0f, 0.0f, 0.0f);
  public final static Vector3f NegX = new Vector3f(-1.0f, 0.0f, 0.0f);
  public final static Vector3f PosY = new Vector3f(0.0f, 1.0f, 0.0f);
  public final static Vector3f NegY = new Vector3f(0.0f, -1.0f, 0.0f);
  public final static Vector3f PosZ = new Vector3f(0.0f, 0.0f, 1.0f);
  public final static Vector3f NegZ = new Vector3f(0.0f, 0.0f, -1.0f);
  public final static Point3f Origin = new Point3f(0.0f, 0.0f, 0.0f);
  public final static Point3f PlusX = new Point3f(0.75f, 0.0f, 0.0f);
  public final static Point3f MinusX = new Point3f(-0.75f, 0.0f, 0.0f);
  public final static Point3f PlusY = new Point3f(0.0f, 0.75f, 0.0f);
  public final static Point3f MinusY = new Point3f(0.0f, -0.75f, 0.0f);
  public final static Point3f PlusZ = new Point3f(0.0f, 0.0f, 0.75f);
  public final static Point3f MinusZ = new Point3f(0.0f, 0.0f, -0.75f);
}
//
//INTERFACE
//CheckboxMenuListener - listen for checkbox change events
//
//DESCRIPTION
//The checkboxChanged method is called by users of this class
//to notify the listener when a checkbox choice has changed on
//a CheckboxMenu class menu.
//
interface CheckboxMenuListener extends EventListener {
  public void checkboxChanged(CheckboxMenu menu, int check);
}
/**
 * ExamineViewerBehavior
 * 
 * @version 1.0, 98/04/16
 */
/**
 * Wakeup on mouse button presses, releases, and mouse movements and generate
 * transforms in an "examination style" that enables the user to rotate,
 * translation, and zoom an object as if it is held at arm"s length. Such an
 * examination style is similar to the "Examine" navigation type used by VRML
 * browsers.
 * 
 * The behavior maps mouse drags to different transforms depending upon the
 * mosue button held down:
 * 
 * Button 1 (left) Horizontal movement --> Y-axis rotation Vertical movement -->
 * X-axis rotation
 * 
 * Button 2 (middle) Horizontal movement --> nothing Vertical movement -->
 * Z-axis translation
 * 
 * Button 3 (right) Horizontal movement --> X-axis translation Vertical movement
 * --> Y-axis translation
 * 
 * To support systems with 2 or 1 mouse buttons, the following alternate
 * mappings are supported while dragging with any mouse button held down and
 * zero or more keyboard modifiers held down:
 * 
 * No modifiers = Button 1 ALT = Button 2 Meta = Button 3 Control = Button 3
 * 
 * The behavior automatically modifies a TransformGroup provided to the
 * constructor. The TransformGroup"s transform can be set at any time by the
 * application or other behaviors to cause the examine rotation and translation
 * to be reset.
 */
// This class is inspired by the MouseBehavior, MouseRotate,
// MouseTranslate, and MouseZoom utility behaviors provided with
// Java 3D. This class differs from those utilities in that it:
//
//    (a) encapsulates all three behaviors into one in order to
//        enforce a specific "Examine" symantic
//
//    (b) supports set/get of the rotation and translation factors
//        that control the speed of movement.
//
//    (c) supports the "Control" modifier as an alternative to the
//        "Meta" modifier not present on PC, Mac, and most non-Sun
//        keyboards. This makes button3 behavior usable on PCs,
//        Macs, and other systems with fewer than 3 mouse buttons.
class ExamineViewerBehavior extends ViewerBehavior {
  // Previous cursor location
  protected int previousX = 0;
  protected int previousY = 0;
  // Saved standard cursor
  protected Cursor savedCursor = null;
  /**
   * Construct an examine behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into a
   * transform group given later with the setTransformGroup( ) method.
   */
  public ExamineViewerBehavior() {
    super();
  }
  /**
   * Construct an examine behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into a
   * transform group given later with the setTransformGroup( ) method.
   * 
   * @param parent
   *            The AWT Component that contains the area generating mouse
   *            events.
   */
  public ExamineViewerBehavior(Component parent) {
    super(parent);
  }
  /**
   * Construct an examine behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into the
   * given transform group.
   * 
   * @param transformGroup
   *            The transform group to be modified by the behavior.
   */
  public ExamineViewerBehavior(TransformGroup transformGroup) {
    super();
    subjectTransformGroup = transformGroup;
  }
  /**
   * Construct an examine behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into the
   * given transform group.
   * 
   * @param transformGroup
   *            The transform group to be modified by the behavior.
   * @param parent
   *            The AWT Component that contains the area generating mouse
   *            events.
   */
  public ExamineViewerBehavior(TransformGroup transformGroup, Component parent) {
    super(parent);
    subjectTransformGroup = transformGroup;
  }
  /**
   * Respond to a button1 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public void onButton1(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position
      previousX = x;
      previousY = y;
      // Change to a "move" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.HAND_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: do nothing
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    //
    // Mouse moved while button down: create a rotation
    //
    // Compute the delta in X and Y from the previous
    // position. Use the delta to compute rotation
    // angles with the mapping:
    //
    //   positive X mouse delta --> positive Y-axis rotation
    //   positive Y mouse delta --> positive X-axis rotation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    int deltaX = x - previousX;
    int deltaY = y - previousY;
    if (deltaX > UNUSUAL_XDELTA || deltaX < -UNUSUAL_XDELTA
        || deltaY > UNUSUAL_YDELTA || deltaY < -UNUSUAL_YDELTA) {
      // Deltas are too huge to be believable. Probably a glitch.
      // Don"t record the new XY location, or do anything.
      return;
    }
    double xRotationAngle = deltaY * XRotationFactor;
    double yRotationAngle = deltaX * YRotationFactor;
    //
    // Build transforms
    //
    transform1.rotX(xRotationAngle);
    transform2.rotY(yRotationAngle);
    // Get and save the current transform matrix
    subjectTransformGroup.getTransform(currentTransform);
    currentTransform.get(matrix);
    translate.set(matrix.m03, matrix.m13, matrix.m23);
    // Translate to the origin, rotate, then translate back
    currentTransform.setTranslation(origin);
    currentTransform.mul(transform1, currentTransform);
    currentTransform.mul(transform2, currentTransform);
    currentTransform.setTranslation(translate);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
    previousX = x;
    previousY = y;
  }
  /**
   * Respond to a button2 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public void onButton2(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position
      previousX = x;
      previousY = y;
      // Change to a "move" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.MOVE_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: do nothing
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    //
    // Mouse moved while button down: create a translation
    //
    // Compute the delta in Y from the previous
    // position. Use the delta to compute translation
    // distances with the mapping:
    //
    //   positive Y mouse delta --> positive Y-axis translation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    int deltaY = y - previousY;
    if (deltaY > UNUSUAL_YDELTA || deltaY < -UNUSUAL_YDELTA) {
      // Deltas are too huge to be believable. Probably a glitch.
      // Don"t record the new XY location, or do anything.
      return;
    }
    double zTranslationDistance = deltaY * ZTranslationFactor;
    //
    // Build transforms
    //
    translate.set(0.0, 0.0, zTranslationDistance);
    transform1.set(translate);
    // Get and save the current transform
    subjectTransformGroup.getTransform(currentTransform);
    // Translate as needed
    currentTransform.mul(transform1, currentTransform);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
    previousX = x;
    previousY = y;
  }
  /**
   * Respond to a button3 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public void onButton3(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position
      previousX = x;
      previousY = y;
      // Change to a "move" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.MOVE_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: do nothing
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    //
    // Mouse moved while button down: create a translation
    //
    // Compute the delta in X and Y from the previous
    // position. Use the delta to compute translation
    // distances with the mapping:
    //
    //   positive X mouse delta --> positive X-axis translation
    //   positive Y mouse delta --> negative Y-axis translation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    int deltaX = x - previousX;
    int deltaY = y - previousY;
    if (deltaX > UNUSUAL_XDELTA || deltaX < -UNUSUAL_XDELTA
        || deltaY > UNUSUAL_YDELTA || deltaY < -UNUSUAL_YDELTA) {
      // Deltas are too huge to be believable. Probably a glitch.
      // Don"t record the new XY location, or do anything.
      return;
    }
    double xTranslationDistance = deltaX * XTranslationFactor;
    double yTranslationDistance = -deltaY * YTranslationFactor;
    //
    // Build transforms
    //
    translate.set(xTranslationDistance, yTranslationDistance, 0.0);
    transform1.set(translate);
    // Get and save the current transform
    subjectTransformGroup.getTransform(currentTransform);
    // Translate as needed
    currentTransform.mul(transform1, currentTransform);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
    previousX = x;
    previousY = y;
  }
  /**
   * Respond to an elapsed frames event (assuming subclass has set up a wakeup
   * criterion for it).
   * 
   * @param time
   *            A WakeupOnElapsedFrames criterion to respond to.
   */
  public void onElapsedFrames(WakeupOnElapsedFrames timeEvent) {
    // Can"t happen
  }
}
/*
 * 
 * Copyright (c) 1998 David R. Nadeau
 *  
 */
/**
 * WalkViewerBehavior is a utility class that creates a "walking style"
 * navigation symantic.
 * 
 * The behavior wakes up on mouse button presses, releases, and mouse movements
 * and generates transforms in a "walk style" that enables the user to walk
 * through a scene, translating and turning about as if they are within the
 * scene. Such a walk style is similar to the "Walk" navigation type used by
 * VRML browsers.
 * <P>
 * The behavior maps mouse drags to different transforms depending upon the
 * mouse button held down:
 * <DL>
 * <DT>Button 1 (left)
 * <DD>Horizontal movement --> Y-axis rotation
 * <DD>Vertical movement --> Z-axis translation
 * 
 * <DT>Button 2 (middle)
 * <DD>Horizontal movement --> Y-axis rotation
 * <DD>Vertical movement --> X-axis rotation
 * 
 * <DT>Button 3 (right)
 * <DD>Horizontal movement --> X-axis translation
 * <DD>Vertical movement --> Y-axis translation
 * </DL>
 * 
 * To support systems with 2 or 1 mouse buttons, the following alternate
 * mappings are supported while dragging with any mouse button held down and
 * zero or more keyboard modifiers held down:
 * <UL>
 * <LI>No modifiers = Button 1
 * <LI>ALT = Button 2
 * <LI>Meta = Button 3
 * <LI>Control = Button 3
 * </UL>
 * The behavior automatically modifies a TransformGroup provided to the
 * constructor. The TransformGroup"s transform can be set at any time by the
 * application or other behaviors to cause the walk rotation and translation to
 * be reset.
 * <P>
 * While a mouse button is down, the behavior automatically changes the cursor
 * in a given parent AWT Component. If no parent Component is given, no cursor
 * changes are attempted.
 * 
 * @version 1.0, 98/04/16
 * @author David R. Nadeau, San Diego Supercomputer Center
 */
class WalkViewerBehavior extends ViewerBehavior {
  // This class is inspired by the MouseBehavior, MouseRotate,
  // MouseTranslate, and MouseZoom utility behaviors provided with
  // Java 3D. This class differs from those utilities in that it:
  //
  //    (a) encapsulates all three behaviors into one in order to
  //        enforce a specific "Walk" symantic
  //
  //    (b) supports set/get of the rotation and translation factors
  //        that control the speed of movement.
  //
  //    (c) supports the "Control" modifier as an alternative to the
  //        "Meta" modifier not present on PC, Mac, and most non-Sun
  //        keyboards. This makes button3 behavior usable on PCs,
  //        Macs, and other systems with fewer than 3 mouse buttons.
  // Previous and initial cursor locations
  protected int previousX = 0;
  protected int previousY = 0;
  protected int initialX = 0;
  protected int initialY = 0;
  // Deadzone size (delta from initial XY for which no
  // translate or rotate action is taken
  protected static final int DELTAX_DEADZONE = 10;
  protected static final int DELTAY_DEADZONE = 10;
  // Keep a set of wakeup criterion for animation-generated
  // event types.
  protected WakeupCriterion[] mouseAndAnimationEvents = null;
  protected WakeupOr mouseAndAnimationCriterion = null;
  protected WakeupOr savedMouseCriterion = null;
  // Saved standard cursor
  protected Cursor savedCursor = null;
  /**
   * Default Rotation and translation scaling factors for animated movements
   * (Button 1 press).
   */
  public static final double DEFAULT_YROTATION_ANIMATION_FACTOR = 0.0002;
  public static final double DEFAULT_ZTRANSLATION_ANIMATION_FACTOR = 0.01;
  protected double YRotationAnimationFactor = DEFAULT_YROTATION_ANIMATION_FACTOR;
  protected double ZTranslationAnimationFactor = DEFAULT_ZTRANSLATION_ANIMATION_FACTOR;
  /**
   * Constructs a new walk behavior that converts mouse actions into rotations
   * and translations. Rotations and translations are written into a
   * TransformGroup that must be set using the setTransformGroup method. The
   * cursor will be changed during mouse actions if the parent frame is set
   * using the setParentComponent method.
   * 
   * @return a new WalkViewerBehavior that needs its TransformGroup and parent
   *         Component set
   */
  public WalkViewerBehavior() {
    super();
  }
  /**
   * Constructs a new walk behavior that converts mouse actions into rotations
   * and translations. Rotations and translations are written into a
   * TransformGroup that must be set using the setTransformGroup method. The
   * cursor will be changed within the given AWT parent Component during mouse
   * drags.
   * 
   * @param parent
   *            a parent AWT Component within which the cursor will change
   *            during mouse drags
   * 
   * @return a new WalkViewerBehavior that needs its TransformGroup and parent
   *         Component set
   */
  public WalkViewerBehavior(Component parent) {
    super(parent);
  }
  /**
   * Constructs a new walk behavior that converts mouse actions into rotations
   * and translations. Rotations and translations are written into the given
   * TransformGroup. The cursor will be changed during mouse actions if the
   * parent frame is set using the setParentComponent method.
   * 
   * @param transformGroup
   *            a TransformGroup whos transform is read and written by the
   *            behavior
   * 
   * @return a new WalkViewerBehavior that needs its TransformGroup and parent
   *         Component set
   */
  public WalkViewerBehavior(TransformGroup transformGroup) {
    super();
    subjectTransformGroup = transformGroup;
  }
  /**
   * Constructs a new walk behavior that converts mouse actions into rotations
   * and translations. Rotations and translations are written into the given
   * TransformGroup. The cursor will be changed within the given AWT parent
   * Component during mouse drags.
   * 
   * @param transformGroup
   *            a TransformGroup whos transform is read and written by the
   *            behavior
   * 
   * @param parent
   *            a parent AWT Component within which the cursor will change
   *            during mouse drags
   * 
   * @return a new WalkViewerBehavior that needs its TransformGroup and parent
   *         Component set
   */
  public WalkViewerBehavior(TransformGroup transformGroup, Component parent) {
    super(parent);
    subjectTransformGroup = transformGroup;
  }
  /**
   * Initializes the behavior.
   */
  public void initialize() {
    super.initialize();
    savedMouseCriterion = mouseCriterion; // from parent class
    mouseAndAnimationEvents = new WakeupCriterion[4];
    mouseAndAnimationEvents[0] = new WakeupOnAWTEvent(
        MouseEvent.MOUSE_DRAGGED);
    mouseAndAnimationEvents[1] = new WakeupOnAWTEvent(
        MouseEvent.MOUSE_PRESSED);
    mouseAndAnimationEvents[2] = new WakeupOnAWTEvent(
        MouseEvent.MOUSE_RELEASED);
    mouseAndAnimationEvents[3] = new WakeupOnElapsedFrames(0);
    mouseAndAnimationCriterion = new WakeupOr(mouseAndAnimationEvents);
    // Don"t use the above criterion until a button 1 down event
  }
  /**
   * Sets the Y rotation animation scaling factor for Y-axis rotations. This
   * scaling factor is used to control the speed of Y rotation when button 1
   * is pressed and dragged.
   * 
   * @param factor
   *            the double Y rotation scaling factor
   */
  public void setYRotationAnimationFactor(double factor) {
    YRotationAnimationFactor = factor;
  }
  /**
   * Gets the current Y animation rotation scaling factor for Y-axis
   * rotations.
   * 
   * @return the double Y rotation scaling factor
   */
  public double getYRotationAnimationFactor() {
    return YRotationAnimationFactor;
  }
  /**
   * Sets the Z animation translation scaling factor for Z-axis translations.
   * This scaling factor is used to control the speed of Z translation when
   * button 1 is pressed and dragged.
   * 
   * @param factor
   *            the double Z translation scaling factor
   */
  public void setZTranslationAnimationFactor(double factor) {
    ZTranslationAnimationFactor = factor;
  }
  /**
   * Gets the current Z animation translation scaling factor for Z-axis
   * translations.
   * 
   * @return the double Z translation scaling factor
   */
  public double getZTranslationAnimationFactor() {
    return ZTranslationAnimationFactor;
  }
  /**
   * Responds to an elapsed frames event. Such an event is generated on every
   * frame while button 1 is held down. On each call, this method computes new
   * Y-axis rotation and Z-axis translation values and writes them to the
   * behavior"s TransformGroup. The translation and rotation amounts are
   * computed based upon the distance between the current cursor location and
   * the cursor location when button 1 was pressed. As this distance
   * increases, the translation or rotation amount increases.
   * 
   * @param time
   *            the WakeupOnElapsedFrames criterion to respond to
   */
  public void onElapsedFrames(WakeupOnElapsedFrames timeEvent) {
    //
    // Time elapsed while button down: create a rotation and
    // a translation.
    //
    // Compute the delta in X and Y from the initial position to
    // the previous position. Multiply the delta times a scaling
    // factor to compute an offset to add to the current translation
    // and rotation. Use the mapping:
    //
    //   positive X mouse delta --> negative Y-axis rotation
    //   positive Y mouse delta --> positive Z-axis translation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    if (buttonPressed != BUTTON1)
      return;
    int deltaX = previousX - initialX;
    int deltaY = previousY - initialY;
    double yRotationAngle = -deltaX * YRotationAnimationFactor;
    double zTranslationDistance = deltaY * ZTranslationAnimationFactor;
    //
    // Build transforms
    //
    transform1.rotY(yRotationAngle);
    translate.set(0.0, 0.0, zTranslationDistance);
    // Get and save the current transform matrix
    subjectTransformGroup.getTransform(currentTransform);
    currentTransform.get(matrix);
    // Translate to the origin, rotate, then translate back
    currentTransform.setTranslation(origin);
    currentTransform.mul(transform1, currentTransform);
    // Translate back from the origin by the original translation
    // distance, plus the new walk translation... but force walk
    // to travel on a plane by ignoring the Y component of a
    // transformed translation vector.
    currentTransform.transform(translate);
    translate.x += matrix.m03; // add in existing X translation
    translate.y = matrix.m13; // use Y translation
    translate.z += matrix.m23; // add in existing Z translation
    currentTransform.setTranslation(translate);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
  }
  /**
   * Responds to a button1 event (press, release, or drag). On a press, the
   * method adds a wakeup criterion to the behavior"s set, callling for the
   * behavior to be awoken on each frame. On a button prelease, this criterion
   * is removed from the set.
   * 
   * @param mouseEvent
   *            the MouseEvent to respond to
   */
  public void onButton1(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position and change
      // the wakeup criterion to include elapsed time wakeups
      // so we can animate.
      previousX = x;
      previousY = y;
      initialX = x;
      initialY = y;
      // Swap criterion... parent class will not reschedule us
      mouseCriterion = mouseAndAnimationCriterion;
      // Change to a "move" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.HAND_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: restore original wakeup
      // criterion which only includes mouse activity, not
      // elapsed time
      mouseCriterion = savedMouseCriterion;
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    previousX = x;
    previousY = y;
  }
  /**
   * Responds to a button2 event (press, release, or drag). On a press, the
   * method records the initial cursor location. On a drag, the difference
   * between the current and previous cursor location provides a delta that
   * controls the amount by which to rotate in X and Y.
   * 
   * @param mouseEvent
   *            the MouseEvent to respond to
   */
  public void onButton2(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position
      previousX = x;
      previousY = y;
      initialX = x;
      initialY = y;
      // Change to a "rotate" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.MOVE_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: do nothing
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    //
    // Mouse moved while button down: create a rotation
    //
    // Compute the delta in X and Y from the previous
    // position. Use the delta to compute rotation
    // angles with the mapping:
    //
    //   positive X mouse delta --> negative Y-axis rotation
    //   positive Y mouse delta --> negative X-axis rotation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    int deltaX = x - previousX;
    int deltaY = 0;
    if (Math.abs(y - initialY) > DELTAY_DEADZONE) {
      // Cursor has moved far enough vertically to consider
      // it intentional, so get it"s delta.
      deltaY = y - previousY;
    }
    if (deltaX > UNUSUAL_XDELTA || deltaX < -UNUSUAL_XDELTA
        || deltaY > UNUSUAL_YDELTA || deltaY < -UNUSUAL_YDELTA) {
      // Deltas are too huge to be believable. Probably a glitch.
      // Don"t record the new XY location, or do anything.
      return;
    }
    double xRotationAngle = -deltaY * XRotationFactor;
    double yRotationAngle = -deltaX * YRotationFactor;
    //
    // Build transforms
    //
    transform1.rotX(xRotationAngle);
    transform2.rotY(yRotationAngle);
    // Get and save the current transform matrix
    subjectTransformGroup.getTransform(currentTransform);
    currentTransform.get(matrix);
    translate.set(matrix.m03, matrix.m13, matrix.m23);
    // Translate to the origin, rotate, then translate back
    currentTransform.setTranslation(origin);
    currentTransform.mul(transform2, currentTransform);
    currentTransform.mul(transform1);
    currentTransform.setTranslation(translate);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
    previousX = x;
    previousY = y;
  }
  /**
   * Responds to a button3 event (press, release, or drag). On a drag, the
   * difference between the current and previous cursor location provides a
   * delta that controls the amount by which to translate in X and Y.
   * 
   * @param mouseEvent
   *            the MouseEvent to respond to
   */
  public void onButton3(MouseEvent mev) {
    if (subjectTransformGroup == null)
      return;
    int x = mev.getX();
    int y = mev.getY();
    if (mev.getID() == MouseEvent.MOUSE_PRESSED) {
      // Mouse button pressed: record position
      previousX = x;
      previousY = y;
      // Change to a "move" cursor
      if (parentComponent != null) {
        savedCursor = parentComponent.getCursor();
        parentComponent.setCursor(Cursor
            .getPredefinedCursor(Cursor.MOVE_CURSOR));
      }
      return;
    }
    if (mev.getID() == MouseEvent.MOUSE_RELEASED) {
      // Mouse button released: do nothing
      // Switch the cursor back
      if (parentComponent != null)
        parentComponent.setCursor(savedCursor);
      return;
    }
    //
    // Mouse moved while button down: create a translation
    //
    // Compute the delta in X and Y from the previous
    // position. Use the delta to compute translation
    // distances with the mapping:
    //
    //   positive X mouse delta --> positive X-axis translation
    //   positive Y mouse delta --> negative Y-axis translation
    //
    // where positive X mouse movement is to the right, and
    // positive Y mouse movement is **down** the screen.
    //
    int deltaX = x - previousX;
    int deltaY = y - previousY;
    if (deltaX > UNUSUAL_XDELTA || deltaX < -UNUSUAL_XDELTA
        || deltaY > UNUSUAL_YDELTA || deltaY < -UNUSUAL_YDELTA) {
      // Deltas are too huge to be believable. Probably a glitch.
      // Don"t record the new XY location, or do anything.
      return;
    }
    double xTranslationDistance = deltaX * XTranslationFactor;
    double yTranslationDistance = -deltaY * YTranslationFactor;
    //
    // Build transforms
    //
    translate.set(xTranslationDistance, yTranslationDistance, 0.0);
    transform1.set(translate);
    // Get and save the current transform
    subjectTransformGroup.getTransform(currentTransform);
    // Translate as needed
    currentTransform.mul(transform1);
    // Update the transform group
    subjectTransformGroup.setTransform(currentTransform);
    previousX = x;
    previousY = y;
  }
}
//
//CLASS
//CheckboxMenu - build a menu of grouped checkboxes
//
//DESCRIPTION
//The class creates a menu with one or more CheckboxMenuItem"s
//and monitors that menu. When a menu checkbox is picked, the
//previous one is turned off (in radio-button style). Then,
//a given listener"s checkboxChanged method is called, passing it
//the menu and the item checked.
//
class CheckboxMenu extends Menu implements ItemListener {
  // State
  protected CheckboxMenuItem[] checks = null;
  protected int current = 0;
  protected CheckboxMenuListener listener = null;
  //  Construct
  public CheckboxMenu(String name, NameValue[] items,
      CheckboxMenuListener listen) {
    this(name, items, 0, listen);
  }
  public CheckboxMenu(String name, NameValue[] items, int cur,
      CheckboxMenuListener listen) {
    super(name);
    current = cur;
    listener = listen;
    if (items == null)
      return;
    checks = new CheckboxMenuItem[items.length];
    for (int i = 0; i < items.length; i++) {
      checks[i] = new CheckboxMenuItem(items[i].name, false);
      checks[i].addItemListener(this);
      add(checks[i]);
    }
    checks[cur].setState(true);
  }
  //  Handle checkbox changed events
  public void itemStateChanged(ItemEvent event) {
    Object src = event.getSource();
    for (int i = 0; i < checks.length; i++) {
      if (src == checks[i]) {
        // Update the checkboxes
        checks[current].setState(false);
        current = i;
        checks[current].setState(true);
        if (listener != null)
          listener.checkboxChanged(this, i);
        return;
      }
    }
  }
  // Methods to get and set state
  public int getCurrent() {
    return current;
  }
  public void setCurrent(int cur) {
    if (cur < 0 || cur >= checks.length)
      return; // ignore out of range choices
    if (checks == null)
      return;
    checks[current].setState(false);
    current = cur;
    checks[current].setState(true);
  }
  public CheckboxMenuItem getSelectedCheckbox() {
    if (checks == null)
      return null;
    return checks[current];
  }
  public void setSelectedCheckbox(CheckboxMenuItem item) {
    if (checks == null)
      return;
    for (int i = 0; i < checks.length; i++) {
      if (item == checks[i]) {
        checks[i].setState(false);
        current = i;
        checks[i].setState(true);
      }
    }
  }
}
/**
 * ViewerBehavior
 * 
 * @version 1.0, 98/04/16
 */
/**
 * Wakeup on mouse button presses, releases, and mouse movements and generate
 * transforms for a transform group. Classes that extend this class impose
 * specific symantics, such as "Examine" or "Walk" viewing, similar to the
 * navigation types used by VRML browsers.
 * 
 * To support systems with 2 or 1 mouse buttons, the following alternate
 * mappings are supported while dragging with any mouse button held down and
 * zero or more keyboard modifiers held down:
 * 
 * No modifiers = Button 1 ALT = Button 2 Meta = Button 3 Control = Button 3
 * 
 * The behavior automatically modifies a TransformGroup provided to the
 * constructor. The TransformGroup"s transform can be set at any time by the
 * application or other behaviors to cause the viewer"s rotation and translation
 * to be reset.
 */
// This class is inspired by the MouseBehavior, MouseRotate,
// MouseTranslate, and MouseZoom utility behaviors provided with
// Java 3D. This class differs from those utilities in that it:
//
//    (a) encapsulates all three behaviors into one in order to
//        enforce a specific viewing symantic
//
//    (b) supports set/get of the rotation and translation factors
//        that control the speed of movement.
//
//    (c) supports the "Control" modifier as an alternative to the
//        "Meta" modifier not present on PC, Mac, and most non-Sun
//        keyboards. This makes button3 behavior usable on PCs,
//        Macs, and other systems with fewer than 3 mouse buttons.
abstract class ViewerBehavior extends Behavior {
  // Keep track of the transform group who"s transform we modify
  // during mouse motion.
  protected TransformGroup subjectTransformGroup = null;
  // Keep a set of wakeup criterion for different mouse-generated
  // event types.
  protected WakeupCriterion[] mouseEvents = null;
  protected WakeupOr mouseCriterion = null;
  // Track which button was last pressed
  protected static final int BUTTONNONE = -1;
  protected static final int BUTTON1 = 0;
  protected static final int BUTTON2 = 1;
  protected static final int BUTTON3 = 2;
  protected int buttonPressed = BUTTONNONE;
  // Keep a few Transform3Ds for use during event processing. This
  // avoids having to allocate new ones on each event.
  protected Transform3D currentTransform = new Transform3D();
  protected Transform3D transform1 = new Transform3D();
  protected Transform3D transform2 = new Transform3D();
  protected Matrix4d matrix = new Matrix4d();
  protected Vector3d origin = new Vector3d(0.0, 0.0, 0.0);
  protected Vector3d translate = new Vector3d(0.0, 0.0, 0.0);
  // Unusual X and Y delta limits.
  protected static final int UNUSUAL_XDELTA = 400;
  protected static final int UNUSUAL_YDELTA = 400;
  protected Component parentComponent = null;
  /**
   * Construct a viewer behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into a
   * transform group given later with the setTransformGroup( ) method.
   */
  public ViewerBehavior() {
    super();
  }
  /**
   * Construct a viewer behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into a
   * transform group given later with the setTransformGroup( ) method.
   * 
   * @param parent
   *            The AWT Component that contains the area generating mouse
   *            events.
   */
  public ViewerBehavior(Component parent) {
    super();
    parentComponent = parent;
  }
  /**
   * Construct a viewer behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into the
   * given transform group.
   * 
   * @param transformGroup
   *            The transform group to be modified by the behavior.
   */
  public ViewerBehavior(TransformGroup transformGroup) {
    super();
    subjectTransformGroup = transformGroup;
  }
  /**
   * Construct a viewer behavior that listens to mouse movement and button
   * presses to generate rotation and translation transforms written into the
   * given transform group.
   * 
   * @param transformGroup
   *            The transform group to be modified by the behavior.
   * @param parent
   *            The AWT Component that contains the area generating mouse
   *            events.
   */
  public ViewerBehavior(TransformGroup transformGroup, Component parent) {
    super();
    subjectTransformGroup = transformGroup;
    parentComponent = parent;
  }
  /**
   * Set the transform group modified by the viewer behavior. Setting the
   * transform group to null disables the behavior until the transform group
   * is again set to an existing group.
   * 
   * @param transformGroup
   *            The new transform group to be modified by the behavior.
   */
  public void setTransformGroup(TransformGroup transformGroup) {
    subjectTransformGroup = transformGroup;
  }
  /**
   * Get the transform group modified by the viewer behavior.
   */
  public TransformGroup getTransformGroup() {
    return subjectTransformGroup;
  }
  /**
   * Sets the parent component who"s cursor will be changed during mouse
   * drags. If no component is given is given to the constructor, or set via
   * this method, no cursor changes will be done.
   * 
   * @param parent
   *            the AWT Component, such as a Frame, within which cursor
   *            changes should take place during mouse drags
   */
  public void setParentComponent(Component parent) {
    parentComponent = parent;
  }
  /*
   * Gets the parent frame within which the cursor changes during mouse drags.
   * 
   * @return the AWT Component, such as a Frame, within which cursor changes
   * should take place during mouse drags. Returns null if no parent is set.
   */
  public Component getParentComponent() {
    return parentComponent;
  }
  /**
   * Initialize the behavior.
   */
  public void initialize() {
    // Wakeup when the mouse is dragged or when a mouse button
    // is pressed or released.
    mouseEvents = new WakeupCriterion[3];
    mouseEvents[0] = new WakeupOnAWTEvent(MouseEvent.MOUSE_DRAGGED);
    mouseEvents[1] = new WakeupOnAWTEvent(MouseEvent.MOUSE_PRESSED);
    mouseEvents[2] = new WakeupOnAWTEvent(MouseEvent.MOUSE_RELEASED);
    mouseCriterion = new WakeupOr(mouseEvents);
    wakeupOn(mouseCriterion);
  }
  /**
   * Process a new wakeup. Interpret mouse button presses, releases, and mouse
   * drags.
   * 
   * @param criteria
   *            The wakeup criteria causing the behavior wakeup.
   */
  public void processStimulus(Enumeration criteria) {
    WakeupCriterion wakeup = null;
    AWTEvent[] event = null;
    int whichButton = BUTTONNONE;
    // Process all pending wakeups
    while (criteria.hasMoreElements()) {
      wakeup = (WakeupCriterion) criteria.nextElement();
      if (wakeup instanceof WakeupOnAWTEvent) {
        event = ((WakeupOnAWTEvent) wakeup).getAWTEvent();
        // Process all pending events
        for (int i = 0; i < event.length; i++) {
          if (event[i].getID() != MouseEvent.MOUSE_PRESSED
              && event[i].getID() != MouseEvent.MOUSE_RELEASED
              && event[i].getID() != MouseEvent.MOUSE_DRAGGED)
            // Ignore uninteresting mouse events
            continue;
          //
          // Regretably, Java event handling (or perhaps
          // underlying OS event handling) doesn"t always
          // catch button bounces (redundant presses and
          // releases), or order events so that the last
          // drag event is delivered before a release.
          // This means we can get stray events that we
          // filter out here.
          //
          if (event[i].getID() == MouseEvent.MOUSE_PRESSED
              && buttonPressed != BUTTONNONE)
            // Ignore additional button presses until a release
            continue;
          if (event[i].getID() == MouseEvent.MOUSE_RELEASED
              && buttonPressed == BUTTONNONE)
            // Ignore additional button releases until a press
            continue;
          if (event[i].getID() == MouseEvent.MOUSE_DRAGGED
              && buttonPressed == BUTTONNONE)
            // Ignore drags until a press
            continue;
          MouseEvent mev = (MouseEvent) event[i];
          int modifiers = mev.getModifiers();
          //
          // Unfortunately, the underlying event handling
          // doesn"t do a "grab" operation when a mouse button
          // is pressed. This means that once a button is
          // pressed, if another mouse button or a keyboard
          // modifier key is pressed, the delivered mouse event
          // will show that a different button is being held
          // down. For instance:
          //
          // Action Event
          //  Button 1 press Button 1 press
          //  Drag with button 1 down Button 1 drag
          //  ALT press -
          //  Drag with ALT & button 1 down Button 2 drag
          //  Button 1 release Button 2 release
          //
          // The upshot is that we can get a button press
          // without a matching release, and the button
          // associated with a drag can change mid-drag.
          //
          // To fix this, we watch for an initial button
          // press, and thenceforth consider that button
          // to be the one held down, even if additional
          // buttons get pressed, and despite what is
          // reported in the event. Only when a button is
          // released, do we end such a grab.
          //
          if (buttonPressed == BUTTONNONE) {
            // No button is pressed yet, figure out which
            // button is down now and how to direct events
            if (((modifiers & InputEvent.BUTTON3_MASK) != 0)
                || (((modifiers & InputEvent.BUTTON1_MASK) != 0) && ((modifiers & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK))) {
              // Button 3 activity (META or CTRL down)
              whichButton = BUTTON3;
            } else if ((modifiers & InputEvent.BUTTON2_MASK) != 0) {
              // Button 2 activity (ALT down)
              whichButton = BUTTON2;
            } else {
              // Button 1 activity (no modifiers down)
              whichButton = BUTTON1;
            }
            // If the event is to press a button, then
            // record that that button is now down
            if (event[i].getID() == MouseEvent.MOUSE_PRESSED)
              buttonPressed = whichButton;
          } else {
            // Otherwise a button was pressed earlier and
            // hasn"t been released yet. Assign all further
            // events to it, even if ALT, META, CTRL, or
            // another button has been pressed as well.
            whichButton = buttonPressed;
          }
          // Distribute the event
          switch (whichButton) {
          case BUTTON1:
            onButton1(mev);
            break;
          case BUTTON2:
            onButton2(mev);
            break;
          case BUTTON3:
            onButton3(mev);
            break;
          default:
            break;
          }
          // If the event is to release a button, then
          // record that that button is now up
          if (event[i].getID() == MouseEvent.MOUSE_RELEASED)
            buttonPressed = BUTTONNONE;
        }
        continue;
      }
      if (wakeup instanceof WakeupOnElapsedFrames) {
        onElapsedFrames((WakeupOnElapsedFrames) wakeup);
        continue;
      }
    }
    // Reschedule us for another wakeup
    wakeupOn(mouseCriterion);
  }
  /**
   * Default X and Y rotation factors, and XYZ translation factors.
   */
  public static final double DEFAULT_XROTATION_FACTOR = 0.02;
  public static final double DEFAULT_YROTATION_FACTOR = 0.005;
  public static final double DEFAULT_XTRANSLATION_FACTOR = 0.02;
  public static final double DEFAULT_YTRANSLATION_FACTOR = 0.02;
  public static final double DEFAULT_ZTRANSLATION_FACTOR = 0.04;
  protected double XRotationFactor = DEFAULT_XROTATION_FACTOR;
  protected double YRotationFactor = DEFAULT_YROTATION_FACTOR;
  protected double XTranslationFactor = DEFAULT_XTRANSLATION_FACTOR;
  protected double YTranslationFactor = DEFAULT_YTRANSLATION_FACTOR;
  protected double ZTranslationFactor = DEFAULT_ZTRANSLATION_FACTOR;
  /**
   * Set the X rotation scaling factor for X-axis rotations.
   * 
   * @param factor
   *            The new scaling factor.
   */
  public void setXRotationFactor(double factor) {
    XRotationFactor = factor;
  }
  /**
   * Get the current X rotation scaling factor for X-axis rotations.
   */
  public double getXRotationFactor() {
    return XRotationFactor;
  }
  /**
   * Set the Y rotation scaling factor for Y-axis rotations.
   * 
   * @param factor
   *            The new scaling factor.
   */
  public void setYRotationFactor(double factor) {
    YRotationFactor = factor;
  }
  /**
   * Get the current Y rotation scaling factor for Y-axis rotations.
   */
  public double getYRotationFactor() {
    return YRotationFactor;
  }
  /**
   * Set the X translation scaling factor for X-axis translations.
   * 
   * @param factor
   *            The new scaling factor.
   */
  public void setXTranslationFactor(double factor) {
    XTranslationFactor = factor;
  }
  /**
   * Get the current X translation scaling factor for X-axis translations.
   */
  public double getXTranslationFactor() {
    return XTranslationFactor;
  }
  /**
   * Set the Y translation scaling factor for Y-axis translations.
   * 
   * @param factor
   *            The new scaling factor.
   */
  public void setYTranslationFactor(double factor) {
    YTranslationFactor = factor;
  }
  /**
   * Get the current Y translation scaling factor for Y-axis translations.
   */
  public double getYTranslationFactor() {
    return YTranslationFactor;
  }
  /**
   * Set the Z translation scaling factor for Z-axis translations.
   * 
   * @param factor
   *            The new scaling factor.
   */
  public void setZTranslationFactor(double factor) {
    ZTranslationFactor = factor;
  }
  /**
   * Get the current Z translation scaling factor for Z-axis translations.
   */
  public double getZTranslationFactor() {
    return ZTranslationFactor;
  }
  /**
   * Respond to a button1 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public abstract void onButton1(MouseEvent mouseEvent);
  /**
   * Respond to a button2 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public abstract void onButton2(MouseEvent mouseEvent);
  /**
   * Responed to a button3 event (press, release, or drag).
   * 
   * @param mouseEvent
   *            A MouseEvent to respond to.
   */
  public abstract void onButton3(MouseEvent mouseEvent);
  /**
   * Respond to an elapsed frames event (assuming subclass has set up a wakeup
   * criterion for it).
   * 
   * @param time
   *            A WakeupOnElapsedFrames criterion to respond to.
   */
  public abstract void onElapsedFrames(WakeupOnElapsedFrames timeEvent);
}
//
//CLASS
//NameValue - create a handy name-value pair
//
//DESCRIPTION
//It is frequently handy to have one or more name-value pairs
//with which to store named colors, named positions, named textures,
//and so forth. Several of the examples use this class.
//
//AUTHOR
//David R. Nadeau / San Diego Supercomputer Center
//
class NameValue {
  public String name;
  public Object value;
  public NameValue(String n, Object v) {
    name = n;
    value = v;
  }
}
           
       </source>
    
   
  <!-- end source code -->
   




== Renders a Java 3D 3D Text objects with a custom extrusion ==






   
  <!-- start source code -->
   
    <source lang="java">
/**********************************************************
 Copyright (C) 2001   Daniel Selman
 First distributed with the book "Java 3D Programming"
 by Daniel Selman and published by Manning Publications.
 http://manning.ru/selman
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation, version 2.
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 The license can be found on the WWW at:
 http://www.fsf.org/copyleft/gpl.html
 Or by writing to:
 Free Software Foundation, Inc.,
 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 Authors can be contacted at:
 Daniel Selman: daniel@selman.org
 If you make changes you think others would like, please 
 contact one of the authors or someone at the 
 www.j3d.org web site.
 **************************************************************/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GraphicsConfigTemplate;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Shape;
import java.io.File;
import java.net.URL;
import java.util.Vector;
import javax.media.j3d.Alpha;
import javax.media.j3d.Appearance;
import javax.media.j3d.AudioDevice;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.Font3D;
import javax.media.j3d.FontExtrusion;
import javax.media.j3d.GraphicsConfigTemplate3D;
import javax.media.j3d.Group;
import javax.media.j3d.Locale;
import javax.media.j3d.Material;
import javax.media.j3d.PhysicalBody;
import javax.media.j3d.PhysicalEnvironment;
import javax.media.j3d.PolygonAttributes;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Text3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.View;
import javax.media.j3d.ViewPlatform;
import javax.media.j3d.VirtualUniverse;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import com.sun.j3d.audioengines.javasound.JavaSoundMixer;
import com.sun.j3d.utils.applet.MainFrame;
/**
 * Renders a Java 3D 3D Text objects with a custom extrusion.
 */
public class Text3DTest extends Java3dApplet {
  private static int m_kWidth = 400;
  private static int m_kHeight = 400;
  public Text3DTest() {
    initJava3d();
  }
  protected double getScale() {
    return 0.2;
  }
  protected BranchGroup createSceneBranchGroup() {
    BranchGroup objRoot = super.createSceneBranchGroup();
    TransformGroup objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    Transform3D yAxis = new Transform3D();
    Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
        4000, 0, 4000, 0, 0, 0);
    TornadoRotation rotator = new TornadoRotation(rotationAlpha, objTrans,
        yAxis, 0.0f, (float) Math.PI * 2.0f);
    rotator.setSchedulingBounds(bounds);
    objTrans.addChild(rotator);
    objTrans.addChild(createText3D(rotator, "setString", 1, 10.0f, 6.0f,
        Text3D.PATH_RIGHT));
    objRoot.addChild(objTrans);
    return objRoot;
  }
  TransformGroup createText3D(TornadoRotation rotator, String szText,
      int nSize, float scale, float trans, int nPath) {
    TransformGroup tg = new TransformGroup();
    Transform3D t3d = new Transform3D();
    t3d.setScale(scale);
    t3d.setTranslation(new Vector3d(0.0, trans, -10.0));
    tg.setTransform(t3d);
    // use a customized FontExtrusion object to control the depth of the
    // text
    double X1 = 0;
    double Y1 = 0;
    double X2 = 3;
    double Y2 = 0;
    Shape extrusionShape = new java.awt.geom.Line2D.Double(X1, Y1, X2, Y2);
    FontExtrusion fontEx = new FontExtrusion(extrusionShape);
    Font3D f3d = new Font3D(new Font("TimesRoman", Font.PLAIN, nSize),
        fontEx);
    TornadoText3D text3D = new TornadoText3D(f3d, szText, new Point3f(0.0f,
        0.0f, 0.0f), Text3D.ALIGN_CENTER, nPath);
    rotator.addTornadoText3D(text3D);
    // create an appearance
    Color3f black = new Color3f(0.1f, 0.1f, 0.1f);
    Color3f objColor = new Color3f(0.2f, 0.2f, 0.2f);
    Appearance app = new Appearance();
    app.setMaterial(new Material(objColor, black, objColor, black, 90.0f));
    // render as a wireframe
    PolygonAttributes polyAttrbutes = new PolygonAttributes();
    polyAttrbutes.setPolygonMode(PolygonAttributes.POLYGON_LINE);
    polyAttrbutes.setCullFace(PolygonAttributes.CULL_NONE);
    app.setPolygonAttributes(polyAttrbutes);
    tg.addChild(new Shape3D(text3D, app));
    return tg;
  }
  public static void main(String[] args) {
    Text3DTest text3DTest = new Text3DTest();
    text3DTest.saveCommandLineArguments(args);
    new MainFrame(text3DTest, m_kWidth, m_kHeight);
  }
}
class TornadoRotation extends RotationInterpolator {
  Vector m_Text3DVector = null;
  public TornadoRotation(Alpha alpha, TransformGroup target,
      Transform3D axisOfRotation, float minimumAngle, float maximumAngle) {
    super(alpha, target, axisOfRotation, minimumAngle, maximumAngle);
    m_Text3DVector = new Vector();
  }
  public void addTornadoText3D(TornadoText3D text3D) {
    m_Text3DVector.add(text3D);
  }
  public void processStimulus(java.util.Enumeration criteria) {
    super.processStimulus(criteria);
    /*
     * for( int n = 0; n < m_Text3DVector.size(); n++ ) { ((TornadoText3D)
     * m_Text3DVector.get( n )).onFrameUpdate(); }
     */
  }
}
class TornadoText3D extends Text3D {
  public TornadoText3D() {
    super();
    setDefaultAttributes();
  }
  public TornadoText3D(Font3D font3D) {
    super(font3D);
    setDefaultAttributes();
  }
  public TornadoText3D(Font3D font3D, java.lang.String string) {
    super(font3D, string);
    setDefaultAttributes();
  }
  public TornadoText3D(Font3D font3D, java.lang.String string,
      Point3f position) {
    super(font3D, string, position);
    setDefaultAttributes();
  }
  public TornadoText3D(Font3D font3D, java.lang.String string,
      Point3f position, int alignment, int path) {
    super(font3D, string, position, alignment, path);
    setDefaultAttributes();
  }
  protected void setDefaultAttributes() {
    setCapability(ALLOW_ALIGNMENT_READ);
    setCapability(ALLOW_ALIGNMENT_WRITE);
    setCapability(ALLOW_CHARACTER_SPACING_READ);
    setCapability(ALLOW_CHARACTER_SPACING_WRITE);
    setCapability(ALLOW_FONT3D_READ);
    setCapability(ALLOW_FONT3D_WRITE);
    setCapability(ALLOW_PATH_READ);
    setCapability(ALLOW_PATH_WRITE);
    setCapability(ALLOW_POSITION_READ);
    setCapability(ALLOW_POSITION_READ);
    setCapability(ALLOW_STRING_READ);
    setCapability(ALLOW_STRING_WRITE);
  }
  public void onFrameUpdate() {
    setString(getString() + ".");
  }
}
/*******************************************************************************
 * Copyright (C) 2001 Daniel Selman
 * 
 * First distributed with the book "Java 3D Programming" by Daniel Selman and
 * published by Manning Publications. http://manning.ru/selman
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, version 2.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * The license can be found on the WWW at: http://www.fsf.org/copyleft/gpl.html
 * 
 * Or by writing to: Free Software Foundation, Inc., 59 Temple Place - Suite
 * 330, Boston, MA 02111-1307, USA.
 * 
 * Authors can be contacted at: Daniel Selman: daniel@selman.org
 * 
 * If you make changes you think others would like, please contact one of the
 * authors or someone at the www.j3d.org web site.
 ******************************************************************************/
//*****************************************************************************
/**
 * Java3dApplet
 * 
 * Base class for defining a Java 3D applet. Contains some useful methods for
 * defining views and scenegraphs etc.
 * 
 * @author Daniel Selman
 * @version 1.0
 */
//*****************************************************************************
abstract class Java3dApplet extends Applet {
  public static int m_kWidth = 300;
  public static int m_kHeight = 300;
  protected String[] m_szCommandLineArray = null;
  protected VirtualUniverse m_Universe = null;
  protected BranchGroup m_SceneBranchGroup = null;
  protected Bounds m_ApplicationBounds = null;
  //  protected com.tornadolabs.j3dtree.Java3dTree m_Java3dTree = null;
  public Java3dApplet() {
  }
  public boolean isApplet() {
    try {
      System.getProperty("user.dir");
      System.out.println("Running as Application.");
      return false;
    } catch (Exception e) {
    }
    System.out.println("Running as Applet.");
    return true;
  }
  public URL getWorkingDirectory() throws java.net.MalformedURLException {
    URL url = null;
    try {
      File file = new File(System.getProperty("user.dir"));
      System.out.println("Running as Application:");
      System.out.println("   " + file.toURL());
      return file.toURL();
    } catch (Exception e) {
    }
    System.out.println("Running as Applet:");
    System.out.println("   " + getCodeBase());
    return getCodeBase();
  }
  public VirtualUniverse getVirtualUniverse() {
    return m_Universe;
  }
  //public com.tornadolabs.j3dtree.Java3dTree getJ3dTree() {
  //return m_Java3dTree;
  //  }
  public Locale getFirstLocale() {
    java.util.Enumeration e = m_Universe.getAllLocales();
    if (e.hasMoreElements() != false)
      return (Locale) e.nextElement();
    return null;
  }
  protected Bounds getApplicationBounds() {
    if (m_ApplicationBounds == null)
      m_ApplicationBounds = createApplicationBounds();
    return m_ApplicationBounds;
  }
  protected Bounds createApplicationBounds() {
    m_ApplicationBounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    return m_ApplicationBounds;
  }
  protected Background createBackground() {
    Background back = new Background(new Color3f(0.9f, 0.9f, 0.9f));
    back.setApplicationBounds(createApplicationBounds());
    return back;
  }
  public void initJava3d() {
    //  m_Java3dTree = new com.tornadolabs.j3dtree.Java3dTree();
    m_Universe = createVirtualUniverse();
    Locale locale = createLocale(m_Universe);
    BranchGroup sceneBranchGroup = createSceneBranchGroup();
    ViewPlatform vp = createViewPlatform();
    BranchGroup viewBranchGroup = createViewBranchGroup(
        getViewTransformGroupArray(), vp);
    createView(vp);
    Background background = createBackground();
    if (background != null)
      sceneBranchGroup.addChild(background);
    //    m_Java3dTree.recursiveApplyCapability(sceneBranchGroup);
    //  m_Java3dTree.recursiveApplyCapability(viewBranchGroup);
    locale.addBranchGraph(sceneBranchGroup);
    addViewBranchGroup(locale, viewBranchGroup);
    onDoneInit();
  }
  protected void onDoneInit() {
    //  m_Java3dTree.updateNodes(m_Universe);
  }
  protected double getScale() {
    return 1.0;
  }
  public TransformGroup[] getViewTransformGroupArray() {
    TransformGroup[] tgArray = new TransformGroup[1];
    tgArray[0] = new TransformGroup();
    // move the camera BACK a little...
    // note that we have to invert the matrix as
    // we are moving the viewer
    Transform3D t3d = new Transform3D();
    t3d.setScale(getScale());
    t3d.setTranslation(new Vector3d(0.0, 0.0, -20.0));
    t3d.invert();
    tgArray[0].setTransform(t3d);
    return tgArray;
  }
  protected void addViewBranchGroup(Locale locale, BranchGroup bg) {
    locale.addBranchGraph(bg);
  }
  protected Locale createLocale(VirtualUniverse u) {
    return new Locale(u);
  }
  protected BranchGroup createSceneBranchGroup() {
    m_SceneBranchGroup = new BranchGroup();
    return m_SceneBranchGroup;
  }
  protected View createView(ViewPlatform vp) {
    View view = new View();
    PhysicalBody pb = createPhysicalBody();
    PhysicalEnvironment pe = createPhysicalEnvironment();
    AudioDevice audioDevice = createAudioDevice(pe);
    if (audioDevice != null) {
      pe.setAudioDevice(audioDevice);
      audioDevice.initialize();
    }
    view.setPhysicalEnvironment(pe);
    view.setPhysicalBody(pb);
    if (vp != null)
      view.attachViewPlatform(vp);
    view.setBackClipDistance(getBackClipDistance());
    view.setFrontClipDistance(getFrontClipDistance());
    Canvas3D c3d = createCanvas3D();
    view.addCanvas3D(c3d);
    addCanvas3D(c3d);
    return view;
  }
  protected PhysicalBody createPhysicalBody() {
    return new PhysicalBody();
  }
  protected AudioDevice createAudioDevice(PhysicalEnvironment pe) {
    JavaSoundMixer javaSoundMixer = new JavaSoundMixer(pe);
    if (javaSoundMixer == null)
      System.out.println("create of audiodevice failed");
    return javaSoundMixer;
  }
  protected PhysicalEnvironment createPhysicalEnvironment() {
    return new PhysicalEnvironment();
  }
  protected float getViewPlatformActivationRadius() {
    return 100;
  }
  protected ViewPlatform createViewPlatform() {
    ViewPlatform vp = new ViewPlatform();
    vp.setViewAttachPolicy(View.RELATIVE_TO_FIELD_OF_VIEW);
    vp.setActivationRadius(getViewPlatformActivationRadius());
    return vp;
  }
  protected Canvas3D createCanvas3D() {
    GraphicsConfigTemplate3D gc3D = new GraphicsConfigTemplate3D();
    gc3D.setSceneAntialiasing(GraphicsConfigTemplate.PREFERRED);
    GraphicsDevice gd[] = GraphicsEnvironment.getLocalGraphicsEnvironment()
        .getScreenDevices();
    Canvas3D c3d = new Canvas3D(gd[0].getBestConfiguration(gc3D));
    c3d.setSize(getCanvas3dWidth(c3d), getCanvas3dHeight(c3d));
    return c3d;
  }
  protected int getCanvas3dWidth(Canvas3D c3d) {
    return m_kWidth;
  }
  protected int getCanvas3dHeight(Canvas3D c3d) {
    return m_kHeight;
  }
  protected double getBackClipDistance() {
    return 100.0;
  }
  protected double getFrontClipDistance() {
    return 1.0;
  }
  protected BranchGroup createViewBranchGroup(TransformGroup[] tgArray,
      ViewPlatform vp) {
    BranchGroup vpBranchGroup = new BranchGroup();
    if (tgArray != null && tgArray.length > 0) {
      Group parentGroup = vpBranchGroup;
      TransformGroup curTg = null;
      for (int n = 0; n < tgArray.length; n++) {
        curTg = tgArray[n];
        parentGroup.addChild(curTg);
        parentGroup = curTg;
      }
      tgArray[tgArray.length - 1].addChild(vp);
    } else
      vpBranchGroup.addChild(vp);
    return vpBranchGroup;
  }
  protected void addCanvas3D(Canvas3D c3d) {
    setLayout(new BorderLayout());
    add(c3d, BorderLayout.CENTER);
    doLayout();
  }
  protected VirtualUniverse createVirtualUniverse() {
    return new VirtualUniverse();
  }
  protected void saveCommandLineArguments(String[] szArgs) {
    m_szCommandLineArray = szArgs;
  }
  protected String[] getCommandLineArguments() {
    return m_szCommandLineArray;
  }
}

           
       </source>
    
   
  <!-- end source code -->
   




== Text3DApp renders a single, rotating Text3D Object ==






   
  <!-- start source code -->
   
    <source lang="java">

/*
 * @(#)Text3DApp.java 1.0 99/04/21
 * 
 * Copyright (c) 1996-1999 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear facility.
 * Licensee represents and warrants that it will not use or redistribute the
 * Software for such purposes.
 */
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.Frame;
import javax.media.j3d.Alpha;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.ColoringAttributes;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Font3D;
import javax.media.j3d.FontExtrusion;
import javax.media.j3d.Material;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Text3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.SimpleUniverse;
/*
 * Text3DApp renders a single, rotating Text3D Object. The Text3D object has
 * material properties specified along with lights so that the Text3D object is
 * shaded.
 */
public class Text3DApp extends Applet {
  public BranchGroup createSceneGraph() {
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();
    Transform3D t3D = new Transform3D();
    t3D.setTranslation(new Vector3f(0.0f, 0.0f, -3.0f));
    TransformGroup objMove = new TransformGroup(t3D);
    objRoot.addChild(objMove);
    // Create the transform group node and initialize it to the
    // identity. Add it to the root of the subgraph.
    TransformGroup objSpin = new TransformGroup();
    objSpin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objMove.addChild(objSpin);
    Appearance textAppear = new Appearance();
    ColoringAttributes textColor = new ColoringAttributes();
    textColor.setColor(1.0f, 0.0f, 0.0f);
    textAppear.setColoringAttributes(textColor);
    textAppear.setMaterial(new Material());
    // Create a simple shape leaf node, add it to the scene graph.
    Font3D font3D = new Font3D(new Font("Helvetica", Font.PLAIN, 1),
        new FontExtrusion());
    Text3D textGeom = new Text3D(font3D, new String("3DText"));
    textGeom.setAlignment(Text3D.ALIGN_CENTER);
    Shape3D textShape = new Shape3D();
    textShape.setGeometry(textGeom);
    textShape.setAppearance(textAppear);
    objSpin.addChild(textShape);
    // Create a new Behavior object that will perform the desired
    // operation on the specified transform object and add it into
    // the scene graph.
    Alpha rotationAlpha = new Alpha(-1, 10000);
    RotationInterpolator rotator = new RotationInterpolator(rotationAlpha,
        objSpin);
    // a bounding sphere specifies a region a behavior is active
    // create a sphere centered at the origin with radius of 100
    BoundingSphere bounds = new BoundingSphere();
    rotator.setSchedulingBounds(bounds);
    objSpin.addChild(rotator);
    DirectionalLight lightD = new DirectionalLight();
    lightD.setInfluencingBounds(bounds);
    lightD.setDirection(new Vector3f(0.0f, 0.0f, -1.0f));
    lightD.setColor(new Color3f(1.0f, 0.0f, 1.0f));
    objMove.addChild(lightD);
    AmbientLight lightA = new AmbientLight();
    lightA.setInfluencingBounds(bounds);
    objMove.addChild(lightA);
    return objRoot;
  } // end of CreateSceneGraph method
  public Text3DApp() {
    setLayout(new BorderLayout());
    Canvas3D canvas3D = new Canvas3D(null);
    canvas3D.setStereoEnable(false);
    add("Center", canvas3D);
    BranchGroup scene = createSceneGraph();
    // SimpleUniverse is a Convenience Utility class
    SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    simpleU.getViewingPlatform().setNominalViewingTransform();
    simpleU.addBranchGraph(scene);
  } // end of Text3DApp (constructor)
  //  The following allows this to be run as an application
  //  as well as an applet
  public static void main(String[] args) {
    System.out
        .println("Text3DApp.java - a demonstration of Text3D in Java 3D");
    System.out.println("The scene is of a rotating Text3D object.");
    System.out.println("The Java 3D Tutorial is available on the web at:");
    System.out.println("http://www.sun.ru/desktop/java3d/collateral");
    Frame frame = new MainFrame(new Text3DApp(), 256, 256);
  } // end of main (method of Text3DApp)
} // end of class Text3DApp

           
       </source>
    
   
  <!-- end source code -->
   




== Text3D Bounds ==






   
  <!-- start source code -->
   
    <source lang="java">
/*
 *  @(#)PickText3DBounds.java 1.13 02/10/21 13:49:52
 *
 * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
 * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed,licensed or intended
 * for use in the design, construction, operation or maintenance of
 * any nuclear facility.
 */
import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.picking.PickTool;
import com.sun.j3d.utils.picking.behaviors.*;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.util.Enumeration;
import java.awt.*;
import java.lang.String;
public class PickText3DBounds extends Applet {
    private SimpleUniverse u = null;
    
  public BranchGroup createSceneGraph(Canvas3D canvas) {
    Color3f eColor    = new Color3f(0.0f, 0.0f, 0.0f);
    Color3f sColor    = new Color3f(1.0f, 1.0f, 1.0f);
    Color3f objColor  = new Color3f(0.6f, 0.6f, 0.6f);
    Color3f lColor1   = new Color3f(1.0f, 0.0f, 0.0f);
    Color3f lColor2   = new Color3f(0.0f, 1.0f, 0.0f);
    Color3f alColor   = new Color3f(0.2f, 0.2f, 0.2f);
    Color3f bgColor   = new Color3f(0.05f, 0.05f, 0.2f);
    
    Transform3D t;
    
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();
    // Create a Transformgroup to scale all objects so they
    // appear in the scene.
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
    t3d.setScale(0.4);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);
    
    // Create a bounds for the background and lights
    BoundingSphere bounds =
      new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
    
    // Set up the background
    Background bg = new Background(bgColor);
    bg.setApplicationBounds(bounds);
    objScale.addChild(bg);
    
    Material m = new Material(objColor, eColor, objColor, sColor, 100.0f);
    Appearance a = new Appearance();
    m.setLightingEnable(true);
    a.setMaterial(m);
    Font3D f3d = new Font3D(new Font("TestFont", Font.PLAIN, 1),
          new FontExtrusion());
    Text3D txt = new Text3D(f3d, new String("TEXT3D"),
          new Point3f(-2.0f, 0.0f, 0.0f));
    //    txt.setCapability(Geometry.ALLOW_INTERSECT);
    Shape3D s3D = new Shape3D();
    s3D.setGeometry(txt);
    s3D.setAppearance(a);
    // Create a transform group node and initialize it to the
    // identity.  Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.
    TransformGroup spinTg = new TransformGroup();
    spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    spinTg.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    spinTg.addChild(s3D);
    objScale.addChild(spinTg);
    
    // Create the transform group node for the each light and initialize
    // it to the identity.  Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.  Add them to the root
    // of the subgraph.
    // Create transformations for the positional lights
    t = new Transform3D();
    Vector3d lPos1 =  new Vector3d(0.0, 0.0, 2.0);
    t.set(lPos1);
    TransformGroup l1Trans = new TransformGroup(t);
    l1Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    l1Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    l1Trans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    objScale.addChild(l1Trans);
    
    t = new Transform3D();
    Vector3d lPos2 = new Vector3d(0.5, 0.8, 2.0);
    t.set(lPos2);
    TransformGroup l2Trans = new TransformGroup(t);
    l2Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    l2Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    l2Trans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    objScale.addChild(l2Trans);
    // Create Geometry for point lights
    ColoringAttributes caL1 = new ColoringAttributes();
    ColoringAttributes caL2 = new ColoringAttributes();
    caL1.setColor(lColor1);
    caL2.setColor(lColor2);
    Appearance appL1 = new Appearance();
    Appearance appL2 = new Appearance();
    appL1.setColoringAttributes(caL1);
    appL2.setColoringAttributes(caL2);
    l1Trans.addChild(new Sphere(0.05f,
  Sphere.GENERATE_NORMALS, 15, appL1));
    l2Trans.addChild(new Sphere(0.05f,
  Sphere.GENERATE_NORMALS, 15, appL2));
    
    // Create lights
    AmbientLight aLgt = new AmbientLight(alColor);
    
    Light lgt1;
    Light lgt2;
    Point3f lPoint  = new Point3f(0.0f, 0.0f, 0.0f);
    Point3f atten = new Point3f(1.0f, 0.0f, 0.0f);
    lgt1 = new PointLight(lColor1, lPoint, atten);
    lgt2 = new PointLight(lColor2, lPoint, atten);
    
    // Set the influencing bounds
    aLgt.setInfluencingBounds(bounds);
    lgt1.setInfluencingBounds(bounds);
    lgt2.setInfluencingBounds(bounds);
    
    // Add the lights into the scene graph
    objScale.addChild(aLgt);
    l1Trans.addChild(lgt1);
    l2Trans.addChild(lgt2);

    PickRotateBehavior behavior1 =
  new PickRotateBehavior(objRoot, canvas, bounds);
    behavior1.setMode(PickTool.BOUNDS);
    objRoot.addChild(behavior1);
    PickZoomBehavior behavior2 =
  new PickZoomBehavior(objRoot, canvas, bounds);
    behavior2.setMode(PickTool.BOUNDS);
    objRoot.addChild(behavior2);
    PickTranslateBehavior behavior3 =
  new PickTranslateBehavior(objRoot, canvas, bounds);
    behavior3.setMode(PickTool.BOUNDS);
    objRoot.addChild(behavior3);
    
    // Let Java 3D perform optimizations on this scene graph.
    objRoot.rupile();
    
    return objRoot;
  }
  
  public PickText3DBounds() {
  }
    public void init() {
  setLayout(new BorderLayout());
  GraphicsConfiguration config =
      SimpleUniverse.getPreferredConfiguration();
  
  Canvas3D c = new Canvas3D(config);
  add("Center", c);
  
  u = new SimpleUniverse(c);
  BranchGroup scene = createSceneGraph(c);
  
  // This will move the ViewPlatform back a bit so the
  // objects in the scene can be viewed.
  u.getViewingPlatform().setNominalViewingTransform();
  
  u.addBranchGraph(scene);
    }
    public void destroy() {
  u.cleanup();
    }
  
  //
  // The following allows Text3DMotion to be run as an application
  // as well as an applet
    //
  public static void main(String[] args) {
    new MainFrame(new PickText3DBounds(), 700, 700);
  }
}

           
       </source>
    
   
  <!-- end source code -->
   




== Text 3D Geometry ==






   
  <!-- start source code -->
   
    <source lang="java">
/*
 * @(#)PickText3DGeometry.java 1.14 02/10/21 13:49:47
 * 
 * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *  - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *  - Redistribution in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGES.
 * 
 * You acknowledge that Software is not designed,licensed or intended for use in
 * the design, construction, operation or maintenance of any nuclear facility.
 */
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.ColoringAttributes;
import javax.media.j3d.Font3D;
import javax.media.j3d.FontExtrusion;
import javax.media.j3d.Geometry;
import javax.media.j3d.Light;
import javax.media.j3d.Material;
import javax.media.j3d.PointLight;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Text3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.picking.PickTool;
import com.sun.j3d.utils.picking.behaviors.PickRotateBehavior;
import com.sun.j3d.utils.picking.behaviors.PickTranslateBehavior;
import com.sun.j3d.utils.picking.behaviors.PickZoomBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;
public class PickText3DGeometry extends Applet {
  private SimpleUniverse u = null;
  public BranchGroup createSceneGraph(Canvas3D canvas) {
    Color3f eColor = new Color3f(0.0f, 0.0f, 0.0f);
    Color3f sColor = new Color3f(1.0f, 1.0f, 1.0f);
    Color3f objColor = new Color3f(0.6f, 0.6f, 0.6f);
    Color3f lColor1 = new Color3f(1.0f, 0.0f, 0.0f);
    Color3f lColor2 = new Color3f(0.0f, 1.0f, 0.0f);
    Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
    Color3f bgColor = new Color3f(0.05f, 0.05f, 0.2f);
    Transform3D t;
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();
    // Create a Transformgroup to scale all objects so they
    // appear in the scene.
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
    t3d.setScale(0.4);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);
    // Create a bounds for the background and lights
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    // Set up the background
    Background bg = new Background(bgColor);
    bg.setApplicationBounds(bounds);
    objScale.addChild(bg);
    Material m = new Material(objColor, eColor, objColor, sColor, 100.0f);
    Appearance a = new Appearance();
    m.setLightingEnable(true);
    a.setMaterial(m);
    Font3D f3d = new Font3D(new Font("TestFont", Font.PLAIN, 1),
        new FontExtrusion());
    Text3D text3D = new Text3D(f3d, new String("TEXT3D"), new Point3f(
        -2.0f, 0.7f, 0.0f));
    text3D.setCapability(Geometry.ALLOW_INTERSECT);
    Shape3D s3D1 = new Shape3D();
    s3D1.setGeometry(text3D);
    s3D1.setAppearance(a);
    // Create a transform group node and initialize it to the
    // identity. Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.
    TransformGroup spinTg1 = new TransformGroup();
    spinTg1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    spinTg1.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    spinTg1.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    spinTg1.addChild(s3D1);
    objScale.addChild(spinTg1);
    Text3D pick = new Text3D(f3d, new String("Pick me"), new Point3f(-2.0f,
        -0.7f, 0.0f));
    pick.setCapability(Geometry.ALLOW_INTERSECT);
    Shape3D s3D2 = new Shape3D();
    s3D2.setGeometry(pick);
    s3D2.setAppearance(a);
    // Create a transform group node and initialize it to the
    // identity. Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.
    TransformGroup spinTg2 = new TransformGroup();
    spinTg2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    spinTg2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    spinTg2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    spinTg2.addChild(s3D2);
    objScale.addChild(spinTg2);
    // Create the transform group node for the each light and initialize
    // it to the identity. Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime. Add them to the root
    // of the subgraph.
    // Create transformations for the positional lights
    t = new Transform3D();
    Vector3d lPos1 = new Vector3d(0.0, 0.0, 2.0);
    t.set(lPos1);
    TransformGroup l1Trans = new TransformGroup(t);
    l1Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    l1Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    l1Trans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    objScale.addChild(l1Trans);
    t = new Transform3D();
    Vector3d lPos2 = new Vector3d(0.5, 1.2, 2.0);
    t.set(lPos2);
    TransformGroup l2Trans = new TransformGroup(t);
    l2Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    l2Trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    l2Trans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    objScale.addChild(l2Trans);
    // Create Geometry for point lights
    ColoringAttributes caL1 = new ColoringAttributes();
    ColoringAttributes caL2 = new ColoringAttributes();
    caL1.setColor(lColor1);
    caL2.setColor(lColor2);
    Appearance appL1 = new Appearance();
    Appearance appL2 = new Appearance();
    appL1.setColoringAttributes(caL1);
    appL2.setColoringAttributes(caL2);
    l1Trans.addChild(new Sphere(0.05f, Sphere.GENERATE_NORMALS
        | Sphere.ENABLE_GEOMETRY_PICKING, 15, appL1));
    l2Trans.addChild(new Sphere(0.05f, Sphere.GENERATE_NORMALS
        | Sphere.ENABLE_GEOMETRY_PICKING, 15, appL2));
    // Create lights
    AmbientLight aLgt = new AmbientLight(alColor);
    Light lgt1;
    Light lgt2;
    Point3f lPoint = new Point3f(0.0f, 0.0f, 0.0f);
    Point3f atten = new Point3f(1.0f, 0.0f, 0.0f);
    lgt1 = new PointLight(lColor1, lPoint, atten);
    lgt2 = new PointLight(lColor2, lPoint, atten);
    // Set the influencing bounds
    aLgt.setInfluencingBounds(bounds);
    lgt1.setInfluencingBounds(bounds);
    lgt2.setInfluencingBounds(bounds);
    // Add the lights into the scene graph
    objScale.addChild(aLgt);
    l1Trans.addChild(lgt1);
    l2Trans.addChild(lgt2);
    PickRotateBehavior behavior1 = new PickRotateBehavior(objRoot, canvas,
        bounds);
    behavior1.setMode(PickTool.GEOMETRY);
    behavior1.setTolerance(0.0f);
    objRoot.addChild(behavior1);
    PickZoomBehavior behavior2 = new PickZoomBehavior(objRoot, canvas,
        bounds);
    behavior2.setMode(PickTool.GEOMETRY);
    behavior2.setTolerance(0.0f);
    objRoot.addChild(behavior2);
    PickTranslateBehavior behavior3 = new PickTranslateBehavior(objRoot,
        canvas, bounds);
    behavior3.setMode(PickTool.GEOMETRY);
    behavior3.setTolerance(0.0f);
    objRoot.addChild(behavior3);
    // Let Java 3D perform optimizations on this scene graph.
    objRoot.rupile();
    return objRoot;
  }
  public PickText3DGeometry() {
  }
  public void init() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config = SimpleUniverse
        .getPreferredConfiguration();
    Canvas3D c = new Canvas3D(config);
    add("Center", c);
    u = new SimpleUniverse(c);
    BranchGroup scene = createSceneGraph(c);
    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    u.getViewingPlatform().setNominalViewingTransform();
    u.addBranchGraph(scene);
  }
  public void destroy() {
    u.cleanup();
  }
  //
  // The following allows Text3DMotion to be run as an application
  // as well as an applet
  //
  public static void main(String[] args) {
    new MainFrame(new PickText3DGeometry(), 700, 700);
  }
}

           
       </source>
    
   
  <!-- end source code -->
   




== Text 3D Load ==






   
  <!-- start source code -->
   
    <source lang="java">
/*
 * @(#)Text3DLoad.java 1.19 02/10/21 13:56:22
 * 
 * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *  - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *  - Redistribution in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGES.
 * 
 * You acknowledge that Software is not designed,licensed or intended for use in
 * the design, construction, operation or maintenance of any nuclear facility.
 */
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Font;
import java.awt.GraphicsConfiguration;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.media.j3d.Alpha;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Font3D;
import javax.media.j3d.FontExtrusion;
import javax.media.j3d.Material;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Text3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.ViewingPlatform;
public class Text3DLoad extends Applet implements ActionListener {
  private String fontName = "TestFont";
  private String textString = null;
  private double tessellation = 0.0;
  private SimpleUniverse u;
  private Button button;
  private boolean behaviorsOn = false;
  private OrbitBehavior orbit;
  public BranchGroup createSceneGraph() {
    float sl = textString.length();
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();
    // Create a Transformgroup to scale all objects so they
    // appear in the scene.
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
    // Assuming uniform size chars, set scale to fit string in view
    t3d.setScale(1.2 / sl);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);
    // Create the transform group node and initialize it to the
    // identity. Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime. Add it to the
    // root of the subgraph.
    TransformGroup objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    objScale.addChild(objTrans);
    Font3D f3d;
    if (tessellation > 0.0) {
      f3d = new Font3D(new Font(fontName, Font.PLAIN, 2), tessellation,
          new FontExtrusion());
    } else {
      f3d = new Font3D(new Font(fontName, Font.PLAIN, 2),
          new FontExtrusion());
    }
    Text3D txt = new Text3D(f3d, textString, new Point3f(-sl / 2.0f, -1.f,
        -1.f));
    Shape3D sh = new Shape3D();
    Appearance app = new Appearance();
    Material mm = new Material();
    mm.setLightingEnable(true);
    app.setMaterial(mm);
    sh.setGeometry(txt);
    sh.setAppearance(app);
    objTrans.addChild(sh);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    if (false) {
      Transform3D yAxis = new Transform3D();
      Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
          4000, 0, 0, 0, 0, 0);
      RotationInterpolator rotator = new RotationInterpolator(
          rotationAlpha, objTrans, yAxis, 0.0f,
          (float) Math.PI * 2.0f);
      rotator.setSchedulingBounds(bounds);
      objTrans.addChild(rotator);
    }
    // Set up the background
    Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f);
    Background bgNode = new Background(bgColor);
    bgNode.setApplicationBounds(bounds);
    objRoot.addChild(bgNode);
    // Set up the ambient light
    Color3f ambientColor = new Color3f(0.3f, 0.3f, 0.3f);
    AmbientLight ambientLightNode = new AmbientLight(ambientColor);
    ambientLightNode.setInfluencingBounds(bounds);
    objRoot.addChild(ambientLightNode);
    // Set up the directional lights
    Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
    Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f);
    Color3f light2Color = new Color3f(1.0f, 1.0f, 0.9f);
    Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f);
    DirectionalLight light1 = new DirectionalLight(light1Color,
        light1Direction);
    light1.setInfluencingBounds(bounds);
    objRoot.addChild(light1);
    DirectionalLight light2 = new DirectionalLight(light2Color,
        light2Direction);
    light2.setInfluencingBounds(bounds);
    objRoot.addChild(light2);
    return objRoot;
  }
  private void usage() {
    System.out
        .println("Usage: java Text3DLoad [-f fontname] [-t tessellation] [<text>]");
    System.exit(0);
  } // End of usage
  public Text3DLoad() {
  }
  public Text3DLoad(String args[]) {
    if (args.length == 0) {
      //     usage();
      textString = "Java3D";
    } else {
      for (int i = 0; i < args.length; i++) {
        if (args[i].startsWith("-")) {
          if (args[i].equals("-f")) {
            if (i < args.length - 1) {
              fontName = args[++i];
            } else {
              usage();
            }
          } else if (args[i].equals("-t")) {
            if (i < args.length - 1) {
              tessellation = Double.parseDouble(args[++i]);
            } else {
              usage();
            }
          } else {
            System.err.println("Argument "" + args[i]
                + "" ignored.");
          }
        } else {
          textString = args[i];
        }
      }
    }
    if (textString == null) {
      usage();
    }
  }
  public void init() {
    if (textString == null) {
      textString = "Java3D";
    }
    setLayout(new BorderLayout());
    button = new Button("remove behaviors");
    button.addActionListener(this);
    Panel p = new Panel();
    p.add(button);
    add("South", p);
    GraphicsConfiguration config = SimpleUniverse
        .getPreferredConfiguration();
    Canvas3D c = new Canvas3D(config);
    add("Center", c);
    // Create a simple scene and attach it to the virtual universe
    BranchGroup scene = createSceneGraph();
    // create a SimpleUniverse with 4 TransformGroups for the mouse
    // behaviors
    u = new SimpleUniverse(c);
    // add the behaviors to the ViewingPlatform
    ViewingPlatform viewingPlatform = u.getViewingPlatform();
    viewingPlatform.setNominalViewingTransform();
    // add orbit behavior to ViewingPlatform
    orbit = new OrbitBehavior(c, OrbitBehavior.REVERSE_ALL
        | OrbitBehavior.STOP_ZOOM);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    orbit.setSchedulingBounds(bounds);
    viewingPlatform.setViewPlatformBehavior(orbit);
    behaviorsOn = true;
    u.addBranchGraph(scene);
  }
  public void destroy() {
    u.cleanup();
  }
  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == button) {
      ViewingPlatform v = u.getViewingPlatform();
      if (behaviorsOn) {
        v.setViewPlatformBehavior(null);
        button.setLabel("add behaviors");
        behaviorsOn = false;
      } else {
        v.setViewPlatformBehavior(orbit);
        button.setLabel("remove behaviors");
        behaviorsOn = true;
      }
    }
  }
  //
  // The following allows Text3DLoad to be run as an application
  // as well as an applet
  //
  public static void main(String[] args) {
    new MainFrame(new Text3DLoad(args), 700, 700);
  }
}

           
       </source>
    
   
  <!-- end source code -->