3dtext.java

java写的文字3d显示。自己看看吧^-^

    }
    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