From ddce3349df1e295b8a3fe6249a8221454761b8ce Mon Sep 17 00:00:00 2001 From: Jesse Morgan Date: Thu, 27 Jan 2011 08:10:26 +0000 Subject: Here's what I've got so far with adapting Dr. Alden's code. A UI class that handles displaying the canvas and a World class that handles the objects in the world. Neither are complete. I'll pick this up tomorrow. I have a feeling we're going to have class path issues with the j3d libaries between our computers. I'll test between my desktop and Mac. If so, I'll drop the JARs for the java3d in the project and import them that way. --- src/tesseract/TesseractUI.java | 240 +++++++++++++++++++++++++++++++++++++++++ src/tesseract/World.java | 154 ++++++++++++++++++++++++++ 2 files changed, 394 insertions(+) create mode 100644 src/tesseract/TesseractUI.java create mode 100644 src/tesseract/World.java (limited to 'src/tesseract') diff --git a/src/tesseract/TesseractUI.java b/src/tesseract/TesseractUI.java new file mode 100644 index 0000000..924f859 --- /dev/null +++ b/src/tesseract/TesseractUI.java @@ -0,0 +1,240 @@ +package tesseract; + +import java.awt.GraphicsConfiguration; +import java.awt.Toolkit; +import java.awt.event.ActionEvent; +import java.awt.event.ActionListener; +import java.awt.event.MouseEvent; +import java.awt.event.MouseMotionAdapter; +import java.awt.event.MouseWheelEvent; +import java.awt.event.MouseWheelListener; + +import javax.media.j3d.BoundingBox; +import javax.media.j3d.Canvas3D; +import javax.media.j3d.Transform3D; +import javax.media.j3d.TransformGroup; +import javax.swing.JFrame; +import javax.swing.JMenu; +import javax.swing.JMenuBar; +import javax.swing.JMenuItem; +import javax.swing.SwingUtilities; +import javax.swing.Timer; +import javax.vecmath.Point3d; +import javax.vecmath.Vector3f; + +import com.sun.j3d.utils.universe.SimpleUniverse; + +/** + * This class is the main UI for the Tesseract Project. + * + * @author Jesse Morgan + */ +public class TesseractUI extends JFrame { + + /** + * Generated serialVersionUID. + */ + private static final long serialVersionUID = 4097744746899308736L; + + /** + * Update Rate. + */ + private static final int UPDATE_RATE = 30; + + /** + * + */ + private static final double UNIT = 1; + + /** + * A reference to the world. + */ + private World myWorld; + + /** + * The Canvas. + */ + private Canvas3D myCanvas; + + /** + * Camera TransformGroup. + */ + private TransformGroup cameraTG; + + /** + * Camera position information. + */ + private double cameraXRotation, cameraYRotation, cameraDistance; + + /** + * UI Constructor. + */ + public TesseractUI() { + super("Tesseract Project"); + setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); + + myWorld = new World( + new BoundingBox(new Point3d(-UNIT / 2, -UNIT / 2, -UNIT / 2), + new Point3d(UNIT / 2, UNIT / 2, UNIT / 2))); + + createMenu(); + setupCanvas(); + pack(); + + // Maximize the windows + if (Toolkit.getDefaultToolkit(). + isFrameStateSupported(JFrame.MAXIMIZED_BOTH)) { + setExtendedState(getExtendedState() | JFrame.MAXIMIZED_BOTH); + } + } + + /** + * Create the menu. + */ + private void createMenu() { + JMenuBar menuBar = new JMenuBar(); + + JMenu simulationMenu = new JMenu("Simulation"); + menuBar.add(simulationMenu); + + /* + JCheckBoxMenuItem cMenuItem = new JCheckBoxMenuItem("Enable Particle Emitters", enableEmitters); + cMenuItem.addActionListener(new ActionListener() { + public void actionPerformed(ActionEvent e) { + enableEmitters = !enableEmitters; + } + }); + menu.add(cMenuItem); + + for (int i = 0; i < forces.length; i++) { + cMenuItem = new JCheckBoxMenuItem(forces[i].toString(), activeForces[i]); + cMenuItem.setActionCommand(i + ""); + cMenuItem.addActionListener(new ActionListener() { + public void actionPerformed(ActionEvent e) { + int index = Integer.parseInt(e.getActionCommand()); + activeForces[index] = !activeForces[index]; + } + }); + menu.add(cMenuItem); + } + */ + + // Exit Menu Item + JMenuItem exit = new JMenuItem("Exit"); + exit.addActionListener(new ActionListener() { + public void actionPerformed(final ActionEvent e) { + // TODO: I feel this is the wrong way of exiting... + System.exit(0); + } + }); + simulationMenu.add(exit); + + setJMenuBar(menuBar); + } + + /** + * Create and show the UI. + */ + private void setupCanvas() { + GraphicsConfiguration config + = SimpleUniverse.getPreferredConfiguration(); + + myCanvas = new Canvas3D(config); + + SimpleUniverse universe = new SimpleUniverse(myCanvas); + universe.getViewer().getView().setSceneAntialiasingEnable(true); + + // Set the camera + cameraTG = universe.getViewingPlatform().getViewPlatformTransform(); + cameraDistance = 3 * UNIT; + updateCamera(); + + // Add the scene BG. + universe.addBranchGraph(myWorld.getScene()); + + // Add the canvas to the frame. + add(myCanvas); + + + // Event listener time + myCanvas.addMouseMotionListener(new MouseMotionAdapter() { + private MouseEvent lastDragEvent = null; + + public void mouseDragged(final MouseEvent e) { + if (lastDragEvent != null) { + cameraXRotation += + Math.toRadians(e.getY() - lastDragEvent.getY()) / 3; + + if (cameraXRotation > Math.PI / 2) { + cameraXRotation = Math.PI / 2; + + } else if (cameraXRotation < -Math.PI / 2) { + cameraXRotation = -Math.PI / 2; + } + + cameraYRotation += + Math.toRadians(e.getX() - lastDragEvent.getX()) / 3; + + updateCamera(); + } + + lastDragEvent = e; + } + + public void mouseMoved(final MouseEvent e) { + lastDragEvent = null; + } + }); + + myCanvas.addMouseWheelListener(new MouseWheelListener() { + public void mouseWheelMoved(final MouseWheelEvent e) { + if (e.getWheelRotation() > 0) { + cameraDistance *= 1.05; + + } else if (e.getWheelRotation() < 0) { + cameraDistance *= 0.95; + } + + updateCamera(); + } + }); + + // Setup the timer. + new Timer(1000 / UPDATE_RATE, new ActionListener() { + public void actionPerformed(final ActionEvent e) { + myCanvas.stopRenderer(); + myWorld.tick(); + myCanvas.startRenderer(); + } + }).start(); + + } + + /** + * Method to update the camera. + */ + private void updateCamera() { + Transform3D camera3D = new Transform3D(); + camera3D.setTranslation(new Vector3f(0f, 0f, (float) -cameraDistance)); + Transform3D tmp = new Transform3D(); + tmp.rotX(cameraXRotation); + camera3D.mul(tmp); + tmp.rotY(cameraYRotation); + camera3D.mul(tmp); + camera3D.invert(); + cameraTG.setTransform(camera3D); + } + + /** + * Start up the program. + * + * @param args Unused commandline arguments. + */ + public static void main(final String[] args) { + SwingUtilities.invokeLater(new Runnable() { + public void run() { + new TesseractUI().setVisible(true); + } + }); + } +} diff --git a/src/tesseract/World.java b/src/tesseract/World.java new file mode 100644 index 0000000..e7555a5 --- /dev/null +++ b/src/tesseract/World.java @@ -0,0 +1,154 @@ +package tesseract; + +import java.util.Iterator; +import java.util.LinkedList; +import java.util.List; + +import javax.media.j3d.BoundingBox; +import javax.media.j3d.BoundingSphere; +import javax.media.j3d.BranchGroup; +import javax.media.j3d.DirectionalLight; +import javax.media.j3d.IndexedLineArray; +import javax.media.j3d.Light; +import javax.media.j3d.Node; +import javax.media.j3d.Shape3D; +import javax.vecmath.Color3f; +import javax.vecmath.Point3d; +import javax.vecmath.Vector3f; + +public class World { + /** + * Root element of the world. + */ + private BranchGroup myScene; + + /** + * Bounding box of the world. + */ + private BoundingBox myVirtualWorldBounds; + + /** + * A list of the objects in the world. + */ + private List myObjects; + + /** + * A list of the forces in the world. + */ + private List myForces; + + //private List emitters; + //private boolean enableEmitters; + + // A list of all the particles in the world + //private List particles; + + // A list of all the objects particles may collide with + //private List collidables; + + // Available forces + //private static final ParticleForceGenerator forces[] = {new Gravity(0.4f)}; + //private boolean activeForces[]; + + // Number of state updates per second + //private final int UPDATE_RATE = 30; + + public World(final BoundingBox bounds) { + myVirtualWorldBounds = bounds; + + myForces = new LinkedList(); + myObjects = new LinkedList(); + + // TODO: Should this go here? + myScene = new BranchGroup(); + myScene.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND); + myScene.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE); + myScene.addChild(createVirtualWorldBoundsShape()); + addLights(); + addEmitters(); + addCollidableObjects(); + myScene.compile(); + } + + + + private Node createVirtualWorldBoundsShape() { + Point3d lower = new Point3d(); + Point3d upper = new Point3d(); + virtualWorldBounds.getLower(lower); + virtualWorldBounds.getUpper(upper); + + double coordinates[] = {lower.x, lower.y, lower.z, upper.x, lower.y, lower.z, + upper.x, lower.y, upper.z, lower.x, lower.y, upper.z, + lower.x, upper.y, lower.z, upper.x, upper.y, lower.z, + upper.x, upper.y, upper.z, lower.x, upper.y, upper.z}; + int coordinateIndices[] = {0, 1, 1, 2, 2, 3, 3, 0, + 4, 5, 5, 6, 6, 7, 7, 4, + 0, 4, 1, 5, 2, 6, 3, 7}; + + IndexedLineArray geometry = new IndexedLineArray(coordinates.length / 3, IndexedLineArray.COORDINATES, coordinateIndices.length); + geometry.setCoordinates(0, coordinates); + geometry.setCoordinateIndices(0, coordinateIndices); + + return new Shape3D(geometry); + } + + private void addLights() { + Light light = new DirectionalLight(new Color3f(1f, 1f, 1f), new Vector3f(-1f, -1f, -1f)); + light.setInfluencingBounds(new BoundingSphere(new Point3d(0, 0, 0), 10)); + scene.addChild(light); + light = new DirectionalLight(new Color3f(0.3f, 0.1f, 0.1f), new Vector3f(1f, 0f, 0f)); + light.setInfluencingBounds(new BoundingSphere(new Point3d(0, 0, 0), 10)); + scene.addChild(light); + } + + private void addEmitters() { + emitters.add(new ColorShiftParticleEmitter(new Vector3f(-0.2f, 0.5f, 0))); + } + + private void addCollidableObjects() { + collidables.add(new Circle(0.25f, new Vector3f(-0.2f, 0.3f, 0), new Vector3f(0.6f, 1, 0))); + collidables.add(new Circle(0.25f, new Vector3f(0.2f, 0.1f, 0), new Vector3f(-0.6f, 1, 0))); + collidables.add(new Circle(0.25f, new Vector3f(-0.2f, -0.1f, 0), new Vector3f(0.6f, 1, 0))); + collidables.add(new Circle(0.25f, new Vector3f(0.2f, -0.3f, 0), new Vector3f(-0.6f, 1, 0))); + +// collidables.add(new Circle(0.25f, new Vector3f(0.15f, 0, 0), new Vector3f(0.02f, 1, 0))); +// collidables.add(new MathMesh(new Vector3f(0.13f, 0, 0), 151)); + for (ParticleCollidableObject object : collidables) + scene.addChild(object.getGroup()); + } + + public void tick() { + for (Iterator itr = particles.iterator(); itr.hasNext();) { + Particle particle = itr.next(); + for (int i = 0; i < forces.length; i++) + if (activeForces[i]) + forces[i].applyForceTo(particle); + particle.updateState(1f / UPDATE_RATE); + for (ParticleCollidableObject object : collidables) { + CollisionInfo ci = object.calculateCollision(particle); + if (ci != null) + object.resolveCollision(particle, ci); + } + if (!virtualWorldBounds.intersect(new Point3d(particle.getPosition()))) { + particle.detach(); + itr.remove(); + } + } + if (!enableEmitters) + return; + for (ParticleEmitter emitter : emitters) { + List children = emitter.tick(); + for (Particle particle : children) + scene.addChild(particle.getGroup()); + particles.addAll(children); + } + } + + /** + * @return the root BG of the scene. + */ + public BranchGroup getScene() { + return myScene; + } +} -- cgit v1.2.3