3dtext.java

java写的文字3d显示。自己看看吧^-^

import java.applet.Applet;
import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.CheckboxMenuItem;
import java.awt.Component;
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...");