3dtext.java

java写的文字3d显示。自己看看吧^-^

    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.compile();
    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();