Java/3D/Swing 3D
Содержание
Java 3D Frame
<source lang="java">
/*
* * Copyright (c) 1998 David R. Nadeau * */
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.Frame; 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.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.Group; import javax.media.j3d.Light; 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; /**
* 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.*
* 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 */ public 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: *
-
*
- Button 1 (left) *
- Horizontal movement --> Y-axis rotation
*
- Vertical movement --> Z-axis translation * *
- Button 2 (middle) *
- Horizontal movement --> Y-axis rotation
*
- Vertical movement --> X-axis rotation * *
- 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 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>
Swing and 3D : book
<source lang="java">
// From Romain Guy"s Weblog romain.guy@mac.ru // import java.awt.BorderLayout; import java.awt.Color; import java.awt.ruponent; import java.awt.Dimension; import java.awt.GradientPaint; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Paint; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.net.URL; import java.util.HashMap; import javax.media.j3d.Alpha; 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.ImageComponent2D; import javax.media.j3d.PolygonAttributes; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.Shape3D; import javax.media.j3d.Texture; import javax.media.j3d.Texture2D; import javax.media.j3d.TextureAttributes; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.View; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingUtilities; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.universe.SimpleUniverse; public class BooksDemo extends JFrame {
private static final int CANVAS3D_WIDTH = 400;
private static final int CANVAS3D_HEIGHT = 400;
private boolean front = true;
private JPanel xpanel = new JPanel();
private Canvas3D c3d;
private RotationInterpolator rotator1;
private Alpha rotor1Alpha;
private com.sun.j3d.utils.geometry.Box book;
private HashMap textures = new HashMap(6);
public BooksDemo() {
super("AmazonPick");
JButton cover1 = UIHelper.createButton("", "cover1_small_button", true);
cover1.addActionListener(new CoverSwitcher("cover1"));
JButton cover2 = UIHelper.createButton("", "cover2_small_button", true);
cover2.addActionListener(new CoverSwitcher("cover2"));
JButton cover3 = UIHelper.createButton("", "cover3_small_button", true);
cover3.addActionListener(new CoverSwitcher("cover3"));
JPanel buttons = new JPanel();
buttons.add(cover1);
buttons.add(cover2);
buttons.add(cover3);
buttons.setOpaque(false);
c3d = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
c3d.setSize(CANVAS3D_WIDTH, CANVAS3D_HEIGHT);
xpanel.add(c3d);
xpanel.setOpaque(false);
this.setContentPane(new GradientPanel());
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(xpanel, BorderLayout.CENTER);
this.getContentPane().add(buttons, BorderLayout.SOUTH);
this.pack();
this.setResizable(false);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
UIHelper.centerOnScreen(this);
}
private boolean isBookShowingFront() {
return front;
}
private void rotateBook() {
if (!isBookShowingFront()) {
rotator1.setMinimumAngle((float) Math.PI * 1.0f);
rotator1.setMaximumAngle(0.0f);
} else {
rotator1.setMinimumAngle(0.0f);
rotator1.setMaximumAngle((float) Math.PI * 1.0f);
}
front = !front;
rotor1Alpha.setStartTime(System.currentTimeMillis());
}
private class CoverSwitcher implements ActionListener {
private String coverName;
CoverSwitcher(String coverName) {
this.coverName = coverName;
}
public void actionPerformed(ActionEvent evt) {
book.getShape(isBookShowingFront() ? book.BACK : book.FRONT)
.setAppearance((Appearance) textures.get(coverName));
rotateBook();
}
}
public void createScene() {
BufferedImage image = new BufferedImage(xpanel.getWidth(), xpanel
.getHeight(), BufferedImage.TYPE_INT_RGB);
getContentPane().paint(image.getGraphics());
BufferedImage subImage = new BufferedImage(CANVAS3D_WIDTH,
CANVAS3D_HEIGHT, BufferedImage.TYPE_INT_RGB);
((Graphics2D) subImage.getGraphics()).drawImage(image, null, -c3d
.getX(), -c3d.getY());
Background bg = new Background(new ImageComponent2D(
ImageComponent2D.FORMAT_RGB, subImage));
BoundingSphere bounds = new BoundingSphere();
bounds.setRadius(100.0);
bg.setApplicationBounds(bounds);
BranchGroup objRoot = new BranchGroup();
objRoot.addChild(bg);
TransformGroup objTg = new TransformGroup();
objTg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D yAxis = new Transform3D();
rotor1Alpha = new Alpha(1, 400);
rotator1 = new RotationInterpolator(rotor1Alpha, objTg, yAxis,
(float) Math.PI * 1.0f, (float) Math.PI * 2.0f);
rotator1.setSchedulingBounds(bounds);
textures.put("pages_top", createTexture("pages_top.jpg"));
textures.put("pages", createTexture("amazon.jpg"));
textures.put("amazon", createTexture("amazon.jpg"));
textures.put("cover1", createTexture("cover1.jpg"));
textures.put("cover2", createTexture("cover2.jpg"));
textures.put("cover3", createTexture("cover3.jpg"));
book = new com.sun.j3d.utils.geometry.Box(0.5f, 0.7f, 0.15f,
com.sun.j3d.utils.geometry.Box.GENERATE_TEXTURE_COORDS,
new Appearance());
book.getShape(book.TOP).setAppearance(
(Appearance) textures.get("pages_top"));
book.getShape(book.RIGHT).setAppearance(
(Appearance) textures.get("pages"));
book.getShape(book.LEFT).setAppearance(
(Appearance) textures.get("amazon"));
book.getShape(book.FRONT).setAppearance(
(Appearance) textures.get("cover1"));
book.getShape(book.BACK).setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
book.getShape(book.FRONT).setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
// book.getShape(book.LEFT).setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
// book.getShape(book.RIGHT).setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
objTg.addChild(book);
objTg.addChild(rotator1);
Transform3D spin = new Transform3D();
Transform3D tempspin = new Transform3D();
spin.rotX(Math.PI / 8.0d);
tempspin.rotY(Math.PI / 7.0d);
spin.mul(tempspin);
TransformGroup objTrans = new TransformGroup(spin);
objTrans.addChild(objTg);
objRoot.addChild(objTrans);
SimpleUniverse u = new SimpleUniverse(c3d);
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(objRoot);
View view = u.getViewer().getView();
view.setSceneAntialiasingEnable(true);
}
private Appearance createTexture(String fileName) {
Image sourceImage = UIHelper.readImage(fileName);
if (sourceImage == null)
System.out.println("Image could not be loaded from " + fileName);
TextureLoader loader = new TextureLoader(sourceImage, this);
ImageComponent2D image = loader.getImage();
if (image == null)
System.out.println("Texture could not be loaded from " + fileName);
Texture2D texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA,
image.getWidth(), image.getHeight());
texture.setImage(0, image);
texture.setEnable(true);
texture.setMagFilter(Texture.BASE_LEVEL_LINEAR);
texture.setMinFilter(Texture.BASE_LEVEL_LINEAR);
Appearance appearance = new Appearance();
PolygonAttributes polyAttributes = new PolygonAttributes(
PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_NONE, 0f);
appearance.setPolygonAttributes(polyAttributes);
appearance.setTexture(texture);
TextureAttributes textureAttributes = new TextureAttributes();
appearance.setTextureAttributes(textureAttributes);
return appearance;
}
private static class GradientPanel extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (!isOpaque()) {
return;
}
int width = getWidth();
int height = getHeight();
Graphics2D g2 = (Graphics2D) g;
Paint storedPaint = g2.getPaint();
g2.setPaint(new GradientPaint(0, 0, Color.WHITE, width, height,
new Color(200, 200, 200)));
g2.fillRect(0, 0, width, height);
g2.setPaint(storedPaint);
}
}
public static void main(String argv[]) {
final BooksDemo xframe = new BooksDemo();
xframe.setVisible(true);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
xframe.createScene();
}
});
}
} final class UIHelper {
public static JButton createButton(String text) {
JButton button = new JButton(text);
button.setFocusPainted(true);
button.setBorderPainted(true);
button.setContentAreaFilled(true);
return button;
}
public static JButton createButton(String text, String icon) {
return createButton(text, icon, false);
}
public static JButton createButton(String text, String icon, boolean flat) {
ImageIcon iconNormal = readImageIcon(icon + ".png");
ImageIcon iconHighlight = readImageIcon(icon + "_highlight.png");
ImageIcon iconPressed = readImageIcon(icon + "_pressed.png");
JButton button = new JButton(text, iconNormal);
button.setFocusPainted(!flat);
button.setBorderPainted(!flat);
button.setContentAreaFilled(!flat);
if (iconHighlight != null) {
button.setRolloverEnabled(true);
button.setRolloverIcon(iconHighlight);
}
if (iconPressed != null)
button.setPressedIcon(iconPressed);
return button;
}
public static void centerOnScreen(Component component) {
Dimension paneSize = component.getSize();
Dimension screenSize = component.getToolkit().getScreenSize();
component.setLocation((screenSize.width - paneSize.width) / 2,
(screenSize.height - paneSize.height) / 2);
}
public static ImageIcon readImageIcon(String fileName) {
Image image = readImage(fileName);
if (image == null)
return null;
return new ImageIcon(image);
}
public static Image readImage(String fileName) {
URL url = UIHelper.class.getResource("images/" + fileName);
if (url == null)
return null;
return java.awt.Toolkit.getDefaultToolkit().getImage(url);
}
}
</source>
Swing based application displaying a Cube and a Sphere
<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.awt.BorderLayout; import java.awt.GraphicsConfigTemplate; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.BufferedImage; import java.awt.image.RenderedImage; import java.io.FileOutputStream; 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.Bounds; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.GraphicsConfigTemplate3D; import javax.media.j3d.Group; import javax.media.j3d.ImageComponent; import javax.media.j3d.ImageComponent2D; import javax.media.j3d.Locale; import javax.media.j3d.Material; import javax.media.j3d.PhysicalBody; import javax.media.j3d.PhysicalEnvironment; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.SceneGraphObject; 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.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JPopupMenu; import javax.swing.ToolTipManager; import javax.swing.WindowConstants; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3d; import javax.vecmath.Vector3f; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder; /**
* This example displays a Swing based application with a JMenuBar that allows * you to switch between displaying a Cube and a Sphere. You can also perform a * simple screen capture and start/stop rotation using menu commands. */
public class SwingTest extends JPanel implements ActionListener {
/**
* the is root of the scenegraph which contains the cube and sphere objects
*/
private BranchGroup sceneBranchGroup = null;
/**
* a rotation interpolator that automatically rotates the cube and sphere
*/
private RotationInterpolator rotator = null;
/**
* an offscreen Canvas3D that is used to perform screen captures
*/
private Canvas3D offScreenCanvas3D = null;
/**
* the image that is attached to the offscreen Canvas3D and contains the
* results of screen captures
*/
private ImageComponent2D imageComponent = null;
/**
* the width of the offscreen Canvas3D
*/
private static final int offScreenWidth = 400;
/**
* the height of the offscreen Canvas3D
*/
private static final int offScreenHeight = 400;
/**
* Constructor. Set the layout algorithm for the panel and initialize the
* Java 3D rendering system and view side scenegraph.
*/
public SwingTest() {
setLayout(new BorderLayout());
init();
}
/**
* Initialize the Java 3D rendering system and view side scenegraph.
*/
protected void init() {
VirtualUniverse universe = createVirtualUniverse();
Locale locale = createLocale(universe);
BranchGroup sceneBranchGroup = createSceneBranchGroup();
Background background = createBackground();
if (background != null)
sceneBranchGroup.addChild(background);
ViewPlatform vp = createViewPlatform();
BranchGroup viewBranchGroup = createViewBranchGroup(
getViewTransformGroupArray(), vp);
locale.addBranchGraph(sceneBranchGroup);
addViewBranchGroup(locale, viewBranchGroup);
createView(vp);
}
/**
* Callback to allow the Canvas3D to be added to a Panel.
*/
protected void addCanvas3D(Canvas3D c3d) {
add(c3d, BorderLayout.CENTER);
}
/**
* Create a Java 3D View and attach it to a ViewPlatform
*/
protected View createView(ViewPlatform vp) {
View view = new View();
PhysicalBody pb = createPhysicalBody();
PhysicalEnvironment pe = createPhysicalEnvironment();
view.setPhysicalEnvironment(pe);
view.setPhysicalBody(pb);
if (vp != null)
view.attachViewPlatform(vp);
view.setBackClipDistance(getBackClipDistance());
view.setFrontClipDistance(getFrontClipDistance());
// create the visible canvas
Canvas3D c3d = createCanvas3D(false);
view.addCanvas3D(c3d);
// create the off screen canvas
view.addCanvas3D(createOffscreenCanvas3D());
// add the visible canvas to a component
addCanvas3D(c3d);
return view;
}
/**
* Create a Background for the Canvas3D.
*/
protected Background createBackground() {
Background back = new Background(new Color3f(0.9f, 0.9f, 0.9f));
back.setApplicationBounds(createApplicationBounds());
return back;
}
/**
* Create a Bounds object for the scene.
*/
protected Bounds createApplicationBounds() {
return new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
}
/**
* Create a Canvas3D.
*
* @param offscreen
* true to specify an offscreen canvas
*/
protected Canvas3D createCanvas3D(boolean offscreen) {
GraphicsConfigTemplate3D gc3D = new GraphicsConfigTemplate3D();
gc3D.setSceneAntialiasing(GraphicsConfigTemplate.PREFERRED);
GraphicsDevice gd[] = GraphicsEnvironment.getLocalGraphicsEnvironment()
.getScreenDevices();
Canvas3D c3d = new Canvas3D(gd[0].getBestConfiguration(gc3D), offscreen);
c3d.setSize(500, 500);
return c3d;
}
/**
* Initialize an offscreen Canvas3D.
*/
protected Canvas3D createOffscreenCanvas3D() {
offScreenCanvas3D = createCanvas3D(true);
offScreenCanvas3D.getScreen3D()
.setSize(offScreenWidth, offScreenHeight);
offScreenCanvas3D.getScreen3D().setPhysicalScreenHeight(
0.0254 / 90 * offScreenHeight);
offScreenCanvas3D.getScreen3D().setPhysicalScreenWidth(
0.0254 / 90 * offScreenWidth);
RenderedImage renderedImage = new BufferedImage(offScreenWidth,
offScreenHeight, BufferedImage.TYPE_3BYTE_BGR);
imageComponent = new ImageComponent2D(ImageComponent.FORMAT_RGB8,
renderedImage);
imageComponent.setCapability(ImageComponent2D.ALLOW_IMAGE_READ);
offScreenCanvas3D.setOffScreenBuffer(imageComponent);
return offScreenCanvas3D;
}
/**
* Callback to get the scale factor for the View side of the scenegraph
*/
protected double getScale() {
return 3;
}
/**
* Get the TransformGroup for the View side of the scenegraph
*/
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;
}
/**
* Adds the View side of the scenegraph to the Locale
*/
protected void addViewBranchGroup(Locale locale, BranchGroup bg) {
locale.addBranchGraph(bg);
}
/**
* Create a Locale for the VirtualUniverse
*/
protected Locale createLocale(VirtualUniverse u) {
return new Locale(u);
}
/**
* Create the scene side of the scenegraph
*/
protected BranchGroup createSceneBranchGroup() {
// create the root of the scene side scenegraph
BranchGroup objRoot = new BranchGroup();
// create a TransformGroup to rotate the objects in the scene
// set the capability bits on the TransformGroup so that it
// can be modified at runtime
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
// create a spherical bounding volume
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
100.0);
// create a 4x4 transformation matrix
Transform3D yAxis = new Transform3D();
// create an Alpha interpolator to automatically generate
// modifications to the rotation component of the transformation matrix
Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0,
4000, 0, 0, 0, 0, 0);
// create a RotationInterpolator behavior to effect the TransformGroup
rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis,
0.0f, (float) Math.PI * 2.0f);
// set the scheduling bounds on the behavior
rotator.setSchedulingBounds(bounds);
// add the behavior to the scenegraph
objTrans.addChild(rotator);
// create the BranchGroup which contains the objects
// we add/remove to and from the scenegraph
sceneBranchGroup = new BranchGroup();
// allow the BranchGroup to have children added at runtime
sceneBranchGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
sceneBranchGroup.setCapability(Group.ALLOW_CHILDREN_READ);
sceneBranchGroup.setCapability(Group.ALLOW_CHILDREN_WRITE);
// add both the cube and the sphere to the scenegraph
sceneBranchGroup.addChild(createCube());
sceneBranchGroup.addChild(createSphere());
// create the colors for the lights
Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
// create the ambient light
AmbientLight aLgt = new AmbientLight(alColor);
aLgt.setInfluencingBounds(bounds);
// create the directional light
DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
lgt1.setInfluencingBounds(bounds);
// add the lights to the scenegraph
objRoot.addChild(aLgt);
objRoot.addChild(lgt1);
// wire the scenegraph together
objTrans.addChild(sceneBranchGroup);
objRoot.addChild(objTrans);
// return the root of the scene side of the scenegraph
return objRoot;
}
/**
* Create a BranchGroup that contains a Cube. The user data for the
* BranchGroup is set so the BranchGroup can be identified.
*/
protected BranchGroup createCube() {
BranchGroup bg = new BranchGroup();
bg.setCapability(BranchGroup.ALLOW_DETACH);
bg.addChild(new com.sun.j3d.utils.geometry.ColorCube());
bg.setUserData("Cube");
return bg;
}
/**
* Create a BranchGroup that contains a Sphere. The user data for the
* BranchGroup is set so the BranchGroup can be identified.
*/
protected BranchGroup createSphere() {
BranchGroup bg = new BranchGroup();
bg.setCapability(BranchGroup.ALLOW_DETACH);
Appearance app = new Appearance();
Color3f objColor = new Color3f(1.0f, 0.7f, 0.8f);
Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
app.setMaterial(new Material(objColor, black, objColor, black, 80.0f));
bg.addChild(new com.sun.j3d.utils.geometry.Sphere(1, app));
bg.setUserData("Sphere");
return bg;
}
/**
* Removes a BranchGroup from the scene based on user data
*
* @param name
* the user data to look for
*/
protected void removeShape(String name) {
try {
java.util.Enumeration e = sceneBranchGroup.getAllChildren();
int index = 0;
while (e.hasMoreElements() != false) {
SceneGraphObject sgObject = (SceneGraphObject) e
.nextElement();
Object userData = sgObject.getUserData();
if (userData instanceof String
&& ((String) userData).rupareTo(name) == 0) {
System.out.println("Removing: " + sgObject.getUserData());
sceneBranchGroup.removeChild(index);
}
index++;
}
} catch (Exception e) {
// the scenegraph may not have yet been synchronized...
}
}
/**
* Creates the PhysicalBody for the View
*/
protected PhysicalBody createPhysicalBody() {
return new PhysicalBody();
}
/**
* Creates the PhysicalEnvironment for the View
*/
protected PhysicalEnvironment createPhysicalEnvironment() {
return new PhysicalEnvironment();
}
/**
* Returns the View Platform Activation Radius
*/
protected float getViewPlatformActivationRadius() {
return 100;
}
/**
* Creates the View Platform for the View
*/
protected ViewPlatform createViewPlatform() {
ViewPlatform vp = new ViewPlatform();
vp.setViewAttachPolicy(View.RELATIVE_TO_FIELD_OF_VIEW);
vp.setActivationRadius(getViewPlatformActivationRadius());
return vp;
}
/**
* Returns the distance to the rear clipping plane.
*/
protected double getBackClipDistance() {
return 100.0;
}
/**
* Returns the distance to the near clipping plane.
*/
protected double getFrontClipDistance() {
return 1.0;
}
/**
* Creates the View side BranchGroup. The ViewPlatform is wired in beneath
* the TransformGroups.
*/
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;
}
/**
* Creates the VirtualUniverse for the application.
*/
protected VirtualUniverse createVirtualUniverse() {
return new VirtualUniverse();
}
/**
* Called to render the scene into the offscreen Canvas3D and save the image
* (as a JPEG) to disk.
*/
protected void onSaveImage() {
offScreenCanvas3D.renderOffScreenBuffer();
offScreenCanvas3D.waitForOffScreenRendering();
System.out.println("Rendered to offscreen");
try {
FileOutputStream fileOut = new FileOutputStream("image.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fileOut);
encoder.encode(imageComponent.getImage());
fileOut.flush();
fileOut.close();
} catch (Exception e) {
System.err.println("Failed to save image: " + e);
}
System.out.println("Saved image.");
}
/**
* AWT callback to indicate that an items has been selected from a menu.
*/
public void actionPerformed(ActionEvent ae) {
System.out.println("Action Performed: " + ae.getActionCommand());
java.util.StringTokenizer toker = new java.util.StringTokenizer(ae
.getActionCommand(), "|");
String menu = toker.nextToken();
String command = toker.nextToken();
if (menu.equals("File")) {
if (command.equals("Exit")) {
System.exit(0);
} else if (command.equals("Save Image")) {
onSaveImage();
}
} else if (menu.equals("View")) {
if (command.equals("Cube")) {
removeShape("Sphere");
sceneBranchGroup.addChild(createCube());
} else if (command.equals("Sphere")) {
removeShape("Cube");
sceneBranchGroup.addChild(createSphere());
}
} else if (menu.equals("Rotate")) {
if (command.equals("On")) {
rotator.setEnable(true);
} else if (command.equals("Off")) {
rotator.setEnable(false);
}
}
}
/**
* Helper method to creates a Swing JMenuItem.
*/
private JMenuItem createMenuItem(String menuText, String buttonText,
ActionListener listener) {
JMenuItem menuItem = new JMenuItem(buttonText);
menuItem.addActionListener(listener);
menuItem.setActionCommand(menuText + "|" + buttonText);
return menuItem;
}
/*
* Registers a window listener to handle ALT+F4 window closing.
*
* @param frame the JFrame for which we want to intercept close messages.
*/
static protected void registerWindowListener(JFrame frame) {
// disable automatic close support for Swing frame.
frame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
// adds the window listener
frame.addWindowListener(new WindowAdapter() {
// handles the system exit window message
public void windowClosing(WindowEvent e) {
System.exit(1);
}
});
}
public JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
JMenu menu = null;
menu = new JMenu("File");
menu.add(createMenuItem("File", "Save Image", this));
menu.add(createMenuItem("File", "Exit", this));
menuBar.add(menu);
menu = new JMenu("View");
menu.add(createMenuItem("View", "Cube", this));
menu.add(createMenuItem("View", "Sphere", this));
menuBar.add(menu);
menu = new JMenu("Rotate");
menu.add(createMenuItem("Rotate", "On", this));
menu.add(createMenuItem("Rotate", "Off", this));
menuBar.add(menu);
return menuBar;
}
/**
* main entry point for the application. Creates the parent JFrame, the
* JMenuBar and creates the JPanel which is the application itself.
*/
public static void main(String[] args) {
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
ToolTipManager ttm = ToolTipManager.sharedInstance();
ttm.setLightWeightPopupEnabled(false);
JFrame frame = new JFrame();
SwingTest swingTest = new SwingTest();
frame.setJMenuBar(swingTest.createMenuBar());
frame.getContentPane().add(swingTest);
frame.setSize(550, 550);
registerWindowListener(frame);
frame.setVisible(true);
}
}
</source>
Test frame class for the dealing with J3D experimentation that uses Swing
<source lang="java">
/*******************************************************************************
* Copyright (c) 1999 Justin Couch * Java Source * * Raw J3D Tutorial * * Version History * Date Version Programmer * ---------- ------- ------------------------------------------ * 01/08/1998 1.0.0 Justin Couch * ******************************************************************************/
// no package // Standard imports import java.awt.ruponent; import java.awt.Frame; import java.awt.Graphics; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Image; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.net.URL; 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.GeometryArray; import javax.media.j3d.GraphicsConfigTemplate3D; import javax.media.j3d.Group; import javax.media.j3d.ImageComponent; import javax.media.j3d.ImageComponent2D; import javax.media.j3d.IndexedQuadArray; import javax.media.j3d.Light; import javax.media.j3d.Locale; import javax.media.j3d.Material; import javax.media.j3d.Node; import javax.media.j3d.PhysicalBody; import javax.media.j3d.PhysicalEnvironment; import javax.media.j3d.PolygonAttributes; import javax.media.j3d.Shape3D; import javax.media.j3d.Texture; import javax.media.j3d.Texture2D; import javax.media.j3d.TextureAttributes; 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.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPopupMenu; import javax.vecmath.AxisAngle4f; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3f; // Application specific imports // none /**
* Test frame class for the dealing with J3D experimentation that uses Swing * <P> * Basic window consists of a menubar and a J3D window * * @author Justin Couch * @version Who Cares! */
public class J3dSwingFrame extends JFrame implements ActionListener {
private JMenuItem close_menu;
private Canvas3D canvas;
private UniverseManager universe;
/**
* Construct the test frame with a menubar and 3D canvas
*/
public J3dSwingFrame() {
super("Java3D Tester");
// Disable lightweight menus
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
JMenuBar menubar = new JMenuBar();
// File menu
JMenu file_menu = new JMenu("File");
menubar.add(file_menu);
close_menu = new JMenuItem("Exit");
close_menu.addActionListener(this);
file_menu.add(close_menu);
setJMenuBar(menubar);
GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D();
GraphicsEnvironment env = GraphicsEnvironment
.getLocalGraphicsEnvironment();
GraphicsDevice device = env.getDefaultScreenDevice();
GraphicsConfiguration config = device.getBestConfiguration(template);
canvas = new Canvas3D(config);
// add the canvas to this frame. Since this is the only thing added to
// the main frame we don"t care about layout managers etc.
getContentPane().add(canvas, "Center");
constructWorld();
setSize(600, 600);
}
/**
* Construct everything that we want in the basic test world
*/
private void constructWorld() {
// create the basic universe
universe = new UniverseManager();
/*
* // create a light grey coloured background Background bg = new
* Background(0.5f, 0.5f, 0.5f); BoundingSphere bounds = new
* BoundingSphere(); bounds.setRadius(1000);
* bg.setApplicationBounds(bounds); universe.addWorldObject(bg);
*/
Camera cam = new Camera();
Vector3f loc = new Vector3f(0, 0, 10.0f);
cam.setLocation(loc);
cam.setHeadLight(true);
universe.addCamera(cam);
cam.setCanvas(canvas);
// add some geometry
ExampleGeometry geom = new ExampleGeometry();
universe.addWorldObject(geom);
universe.makeLive();
}
/**
* An mouse action has occurred. Used to process menu item selection.
*
* @param evt
* The event that caused this method to be called.
*/
public void actionPerformed(ActionEvent evt) {
Object src = evt.getSource();
if (src == close_menu)
System.exit(0);
}
/**
* Start the application....
*/
public static void main(String[] args) {
Frame frame = new J3dSwingFrame();
frame.setVisible(true);
}
} /*******************************************************************************
* Copyright (c) 1999 Justin Couch Java Source * * Raw J3D Tutorial * * Version History Date Version Programmer ---------- ------- * ------------------------------------------ 01/08/1998 1.0.0 Justin Couch * ******************************************************************************/
// no package // Application specific imports // none /**
* Test class for representing a universe * <P> * Basic universe consisting of a default Locale and three branch graphs for * objects that exist in the display and world spaces, as well as a separate * branch for cameras. * * @author Justin Couch * @version Who Cares! */
class UniverseManager extends VirtualUniverse {
private Locale locale;
private BranchGroup view_group;
private BranchGroup world_object_group;
/**
* Create the basic universe and all of the supporting infrastructure that
* is needed by a J3D application. The default setup just uses a single
* local located at the origin.
*/
public UniverseManager() {
locale = new Locale(this);
view_group = new BranchGroup();
view_group.setCapability(Group.ALLOW_CHILDREN_EXTEND);
world_object_group = new BranchGroup();
world_object_group.setCapability(Group.ALLOW_CHILDREN_EXTEND);
}
/**
* Add a camera to the world.
*
* @param cam
* The camera that may be added
*/
public void addCamera(Camera cam) {
view_group.addChild(cam.getNode());
}
/**
* Add an object to the world object group.
*
* @param node
* The node that may be added
*/
public void addWorldObject(Node node) {
world_object_group.addChild(node);
}
/**
* Make the universe live by adding the objects to the locale
*/
public void makeLive() {
view_group.rupile();
world_object_group.rupile();
locale.addBranchGraph(view_group);
locale.addBranchGraph(world_object_group);
}
} /*******************************************************************************
* Copyright (c) 1999 Justin Couch Java Source * * Raw J3D Tutorial * * Version History Date Version Programmer ---------- ------- * ------------------------------------------ 01/08/1998 1.0.0 Justin Couch * ******************************************************************************/
// Application specific imports // none /**
* Test class for showing the use of a View and ViewPlatform * <P> * Basic view consists of the standard placement. * * @author Justin Couch * @version Who Cares! */
class Camera {
private static final double BACK_CLIP_DISTANCE = 100.0;
private static final Color3f White = new Color3f(1, 1, 1);
private static final BoundingSphere LIGHT_BOUNDS;
private Group hud_group;
private TransformGroup root_tx_grp;
private Transform3D location;
private ViewPlatform platform;
private View view;
private DirectionalLight headlight;
private PhysicalBody body;
private PhysicalEnvironment env;
static {
Point3d origin = new Point3d(0, 0, 0);
LIGHT_BOUNDS = new BoundingSphere(origin, BACK_CLIP_DISTANCE);
}
public Camera() {
hud_group = new Group();
hud_group.setCapability(Group.ALLOW_CHILDREN_EXTEND);
platform = new ViewPlatform();
location = new Transform3D();
root_tx_grp = new TransformGroup();
root_tx_grp.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
root_tx_grp.setTransform(location);
root_tx_grp.addChild(platform);
root_tx_grp.addChild(hud_group);
// now create the headlight
headlight = new DirectionalLight();
headlight.setCapability(Light.ALLOW_STATE_WRITE);
headlight.setColor(White);
headlight.setInfluencingBounds(LIGHT_BOUNDS);
root_tx_grp.addChild(headlight);
body = new PhysicalBody();
env = new PhysicalEnvironment();
view = new View();
view.setBackClipDistance(BACK_CLIP_DISTANCE);
view.setPhysicalBody(body);
view.setPhysicalEnvironment(env);
view.attachViewPlatform(platform);
}
/**
* Set the canvas that this camera is using
*
* @param canvas
* The canvas that is to be used for this camera
*/
public void setCanvas(Canvas3D canvas) {
view.addCanvas3D(canvas);
}
/**
* Set the location of the camera. This is the location of the center of the
* camera relative to whatever is used as its root group node.
*
* @param loc
* The location of the camera
*/
public void setLocation(Vector3f loc) {
location.setTranslation(loc);
root_tx_grp.setTransform(location);
}
/**
* Set the orientation of the camera.
*
* @param angle
* The orientation of the camera
*/
public void setOrientation(AxisAngle4f angle) {
location.setRotation(angle);
root_tx_grp.setTransform(location);
}
/**
* Add some goemetry to the HUD area. This geometry must come complete with
* its own parent transform to offset the object by the appropriate amount.
* The camera does not do any auto-offsets of geometry.
*
* @param geom
* The geometry to add
*/
public void addHUDObject(Node geom) {
hud_group.addChild(geom);
}
/**
* Enable the headlight that is attached to the camera.
*
* @param enable
* True if the light is to be turned on
*/
public void setHeadLight(boolean enable) {
headlight.setEnable(enable);
}
/**
* Get the J3D node that is used to represent the camera
*
* @return The root TransformGroup of the camera
*/
Node getNode() {
return root_tx_grp;
}
} /*******************************************************************************
* Copyright (c) 1999 Justin Couch Java Source * * Raw J3D Tutorial * * Version History Date Version Programmer ---------- ------- * ------------------------------------------ 01/08/1998 1.0.0 Justin Couch * ******************************************************************************/
// Application specific imports // none /**
* Test class illustrating the use of geometry. * <P> * A simple Shape3D class that contains a flat square constructed from a raw * geometry array. The square is located at the origin with bounds 0.5 along * each axis and lies in the X,Y plain. The normals point along the +Z axis. * However, the geometry is set to do no backface culling so you should see it * regardless of viewing position. * <P> * The basic appearance is set uses color in each corner to blend towards the * others. An emissive color of red is set just in case other colors don"t work. * * @author Justin Couch * @version Who Cares! */
class ExampleGeometry extends Shape3D {
private IndexedQuadArray geom;
private Appearance appearance;
private Texture texture;
/**
* Construct the test object with geometry
*/
public ExampleGeometry() {
constructGeometry();
constructAppearance();
}
private void constructGeometry() {
int flags = GeometryArray.COORDINATES | GeometryArray.COLOR_4
| GeometryArray.NORMALS;
geom = new IndexedQuadArray(4, flags, 4);
double[] coordinates = { 0.5, 0.5, 0, 0.5, -0.5, 0, -0.5, -0.5, 0,
-0.5, 0.5, 0 };
int[] indices = { 0, 1, 2, 3 };
geom.setCoordinates(0, coordinates);
geom.setCoordinateIndices(0, indices);
float[] colors = { 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0 };
geom.setColors(0, colors);
geom.setColorIndices(0, indices);
float[] normal = { 0, 0, 1 };
geom.setNormal(0, normal);
geom.setNormal(1, normal);
geom.setNormal(2, normal);
geom.setNormal(3, normal);
setGeometry(geom);
}
/**
* Construct the default appearance.
*/
private void constructAppearance() {
appearance = new Appearance();
TextureAttributes tex_attr = new TextureAttributes();
tex_attr.setTextureMode(TextureAttributes.DECAL);
tex_attr.setPerspectiveCorrectionMode(TextureAttributes.FASTEST);
appearance.setTextureAttributes(tex_attr);
ColoringAttributes col_attr = new ColoringAttributes();
col_attr.setShadeModel(ColoringAttributes.SHADE_GOURAUD);
appearance.setColoringAttributes(col_attr);
PolygonAttributes rend_attr = new PolygonAttributes();
rend_attr.setCullFace(PolygonAttributes.CULL_NONE);
// uncomment this if you want it to display in line draw mode
// rend_attr.setPolygonMode(PolygonAttributes.POLYGON_LINE);
appearance.setPolygonAttributes(rend_attr);
Material mat = new Material();
// Color3f col = new Color3f(1, 0, 0);
// mat.setEmissiveColor(col);
appearance.setMaterial(mat);
setAppearance(appearance);
}
/**
* Set the texture on our goemetry
* <P>
* Always specified as a URL so that we may fetch it from anywhere.
*
* @param url
* The url to the image.
*/
public void setTexture(URL url) {
Toolkit tk = Toolkit.getDefaultToolkit();
Image src_img = tk.createImage(url);
BufferedImage buf_img = null;
if (!(src_img instanceof BufferedImage)) {
// create a component anonymous inner class to give us the image
// observer we need to get the width and height of the source image.
Component obs = new Component() {
};
int width = src_img.getWidth(obs);
int height = src_img.getHeight(obs);
// construct the buffered image from the source data.
buf_img = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
Graphics g = buf_img.getGraphics();
g.drawImage(src_img, 0, 0, null);
g.dispose();
} else
buf_img = (BufferedImage) src_img;
src_img.flush();
ImageComponent img_comp = new ImageComponent2D(
ImageComponent.FORMAT_RGB, buf_img);
texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGB, img_comp
.getWidth(), img_comp.getHeight());
appearance.setTexture(texture);
buf_img.flush();
}
}
</source>
