Java tutorial
/* * @(#)BackgroundApp.java 1.1 00/09/22 14:03 * * Copyright (c) 1996-2000 Sun Microsystems, Inc. All Rights Reserved. * * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use, * modify and redistribute this software in source and binary code form, * provided that i) this copyright notice and license appear on all copies of * the software; and ii) Licensee does not utilize the software in a manner * which is disparaging to Sun. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY * OF SUCH DAMAGES. * * This software is not designed or intended for use in on-line control of * aircraft, air traffic, aircraft navigation or aircraft communications; or in * the design, construction, operation or maintenance of any nuclear facility. * Licensee represents and warrants that it will not use or redistribute the * Software for such purposes. */ import java.applet.Applet; import java.awt.BorderLayout; import java.awt.Frame; import java.awt.Window; import java.awt.event.*; import java.awt.GraphicsConfiguration; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.universe.*; import com.sun.j3d.utils.geometry.*; import javax.media.j3d.*; import javax.vecmath.*; import java.awt.event.*; import java.awt.AWTEvent; import java.util.Enumeration; import com.sun.j3d.utils.behaviors.keyboard.*; /* * BackgroundApp is an example of creating a geometric background in a Java 3D * program. * * This program creates a geometric background of stars and one constellation. * Also created in the scene is a grid of green lines. These represent a * horizontal surface (the ground) in in the local area. It is provided for a * reference for movement in the scene. * * The viewer can move in this virtual world using the arrow keys. The movement * is provided by the KeyNavigator class. * * This example also uses a BoundingLeaf object for the application bounds for * the KeyNavigatorBehavior class. There is a bug kludge in this code. See below * for more details. * * This program was created as a companion to the Java 3D API tutorial available * from the Java 3D API homepage. * * Background and BoundingLeaf classes are documented in Chapter 3. Interaction, * in general, and KeyNavigator class, specifically, are documented in Chapter * 4. * * The first 200 lines (or so) of code simply create the geometry for the * background and the rest of the view. * * There is no guarantee that any of the stars nor the constellation is an * accurate representation of the the view from earth. */ public class BackgroundApp extends Applet { Shape3D createLand() { LineArray landGeom = new LineArray(44, GeometryArray.COORDINATES | GeometryArray.COLOR_3); float l = -50.0f; for (int c = 0; c < 44; c += 4) { landGeom.setCoordinate(c + 0, new Point3f(-50.0f, 0.0f, l)); landGeom.setCoordinate(c + 1, new Point3f(50.0f, 0.0f, l)); landGeom.setCoordinate(c + 2, new Point3f(l, 0.0f, -50.0f)); landGeom.setCoordinate(c + 3, new Point3f(l, 0.0f, 50.0f)); l += 10.0f; } Color3f c = new Color3f(0.1f, 0.8f, 0.1f); for (int i = 0; i < 44; i++) landGeom.setColor(i, c); return new Shape3D(landGeom); } public BranchGroup createSceneGraph(SimpleUniverse su) { // Create the root of the branch graph BranchGroup objRootBG = new BranchGroup(); Vector3f translate = new Vector3f(); Transform3D T3D = new Transform3D(); translate.set(0.0f, -0.3f, 0.0f); T3D.setTranslation(translate); TransformGroup objRoot = new TransformGroup(T3D); objRootBG.addChild(objRoot); objRoot.addChild(createLand()); BoundingLeaf boundingLeaf = new BoundingLeaf(new BoundingSphere()); PlatformGeometry platformGeom = new PlatformGeometry(); platformGeom.addChild(boundingLeaf); platformGeom.compile(); su.getViewingPlatform().setPlatformGeometry(platformGeom); KeyNavigatorBehavior keyNavBeh = new KeyNavigatorBehavior( su.getViewingPlatform().getViewPlatformTransform()); keyNavBeh.setSchedulingBoundingLeaf(boundingLeaf); objRootBG.addChild(keyNavBeh); Background background = new Background(); background.setApplicationBounds(new BoundingSphere(new Point3d(), 1000.0)); background.setGeometry(createBackGraph()); objRoot.addChild(background); AmbientLight ambientLight = new AmbientLight(); ambientLight.setInfluencingBounds(new BoundingSphere()); objRootBG.addChild(ambientLight); return objRootBG; } // end of CreateSceneGraph method ///////////////////////////////////////////////////////// public BranchGroup createBackGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); PointArray starGeom1 = new PointArray(7, PointArray.COORDINATES); Appearance starAppear1 = new Appearance(); starGeom1.setCoordinate(0, new Point3f(0.79483311f, -0.58810995f, 0.14955615f)); starGeom1.setCoordinate(1, new Point3f(0.44430932f, -0.55736839f, -0.70137505f)); starGeom1.setCoordinate(2, new Point3f(0.94901367f, -0.30404968f, 0.08322775f)); starGeom1.setCoordinate(3, new Point3f(0.68060123f, -0.43044807f, 0.59287173f)); starGeom1.setCoordinate(4, new Point3f(-0.11641672f, 0.47273532f, 0.87348049f)); starGeom1.setCoordinate(5, new Point3f(-0.10399289f, -0.98059412f, 0.16619437f)); starGeom1.setCoordinate(6, new Point3f(0.08024400f, -0.96944100f, -0.23182900f)); PointAttributes point1 = new PointAttributes(4.0f, false); starAppear1.setPointAttributes(point1); objRoot.addChild(new Shape3D(starGeom1, starAppear1)); PointArray starGeom2 = new PointArray(18, PointArray.COORDINATES); starGeom2.setCoordinate(0, new Point3f(0.050844f, -0.992329f, 0.112678f)); starGeom2.setCoordinate(1, new Point3f(-0.063091f, -0.997672f, 0.025869f)); starGeom2.setCoordinate(2, new Point3f(0.096706f, -0.980384f, 0.171736f)); starGeom2.setCoordinate(3, new Point3f(-0.562384f, 0.073568f, 0.823595f)); starGeom2.setCoordinate(4, new Point3f(-0.863904f, 0.059045f, 0.500180f)); starGeom2.setCoordinate(5, new Point3f(-0.727033f, 0.304149f, 0.615559f)); starGeom2.setCoordinate(6, new Point3f(-0.724850f, 0.535590f, 0.433281f)); starGeom2.setCoordinate(7, new Point3f(0.185904f, -0.976907f, -0.105311f)); starGeom2.setCoordinate(8, new Point3f(0.738028f, -0.531886f, -0.415221f)); starGeom2.setCoordinate(9, new Point3f(-0.402152f, 0.392690f, -0.827085f)); starGeom2.setCoordinate(10, new Point3f(-0.020020f, -0.999468f, -0.025724f)); starGeom2.setCoordinate(11, new Point3f(-0.384103f, -0.887075f, 0.256050f)); starGeom2.setCoordinate(12, new Point3f(-0.224464f, -0.968946f, -0.103720f)); starGeom2.setCoordinate(13, new Point3f(-0.828880f, -0.397932f, -0.393203f)); starGeom2.setCoordinate(14, new Point3f(-0.010557f, -0.998653f, 0.050797f)); starGeom2.setCoordinate(15, new Point3f(-0.282122f, 0.258380f, -0.923930f)); starGeom2.setCoordinate(16, new Point3f(-0.941342f, -0.030364f, 0.336082f)); starGeom2.setCoordinate(17, new Point3f(0.00057f, -0.99651f, -0.08344f)); Appearance starAppear2 = new Appearance(); PointAttributes point2 = new PointAttributes(2.0f, false); starAppear2.setPointAttributes(point2); objRoot.addChild(new Shape3D(starGeom2, starAppear2)); PointArray starGeom3 = new PointArray(20, PointArray.COORDINATES); starGeom3.setCoordinate(0, new Point3f(0.07292f, -0.98862f, -0.13153f)); starGeom3.setCoordinate(1, new Point3f(0.23133f, -0.87605f, -0.42309f)); starGeom3.setCoordinate(2, new Point3f(-0.08215f, -0.64657f, 0.75840f)); starGeom3.setCoordinate(3, new Point3f(-0.84545f, 0.53398f, 0.00691f)); starGeom3.setCoordinate(4, new Point3f(-0.49365f, -0.83645f, -0.23795f)); starGeom3.setCoordinate(5, new Point3f(0.06883f, -0.99319f, -0.09396f)); starGeom3.setCoordinate(6, new Point3f(0.87582f, -0.40662f, 0.25997f)); starGeom3.setCoordinate(7, new Point3f(-0.09095f, -0.99555f, 0.02467f)); starGeom3.setCoordinate(8, new Point3f(0.45306f, -0.81575f, -0.35955f)); starGeom3.setCoordinate(9, new Point3f(0.17669f, -0.97939f, 0.09776f)); starGeom3.setCoordinate(10, new Point3f(0.27421f, -0.83963f, 0.46884f)); starGeom3.setCoordinate(11, new Point3f(0.32703f, -0.94013f, -0.09584f)); starGeom3.setCoordinate(12, new Point3f(-0.01615f, -0.99798f, -0.06132f)); starGeom3.setCoordinate(13, new Point3f(-0.76665f, 0.45998f, -0.44791f)); starGeom3.setCoordinate(14, new Point3f(-0.91025f, -0.07102f, 0.40791f)); starGeom3.setCoordinate(15, new Point3f(-0.00240f, -0.97104f, -0.23887f)); starGeom3.setCoordinate(16, new Point3f(0.91936f, -0.39244f, 0.02740f)); starGeom3.setCoordinate(17, new Point3f(0.18290f, -0.97993f, 0.07920f)); starGeom3.setCoordinate(18, new Point3f(-0.48755f, 0.61592f, 0.61884f)); starGeom3.setCoordinate(19, new Point3f(-0.89375f, 0.36087f, -0.26626f)); objRoot.addChild(new Shape3D(starGeom3)); int[] stripCount = { 10 }; LineStripArray orion = new LineStripArray(10, LineStripArray.COORDINATES, stripCount); orion.setCoordinate(0, new Point3f(0.978330f, -0.033900f, 0.204426f)); orion.setCoordinate(1, new Point3f(0.968007f, -0.167860f, 0.186506f)); orion.setCoordinate(2, new Point3f(0.981477f, -0.142660f, 0.127873f)); orion.setCoordinate(3, new Point3f(0.983764f, -0.005220f, 0.179391f)); orion.setCoordinate(4, new Point3f(0.981112f, 0.110597f, 0.158705f)); orion.setCoordinate(5, new Point3f(0.967377f, 0.172516f, 0.185523f)); orion.setCoordinate(6, new Point3f(0.961385f, 0.128845f, 0.243183f)); orion.setCoordinate(7, new Point3f(0.978330f, -0.033900f, 0.204426f)); orion.setCoordinate(8, new Point3f(0.981293f, -0.020980f, 0.191375f)); orion.setCoordinate(9, new Point3f(0.983764f, -0.005220f, 0.179391f)); objRoot.addChild(new Shape3D(orion)); objRoot.compile(); return objRoot; } // end of CreateBackGraph method /////////////////////BackgroundApp////////////////////// public BackgroundApp() { setLayout(new BorderLayout()); GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); Canvas3D canvas3D = new Canvas3D(config); canvas3D.setStereoEnable(false); add("Center", canvas3D); // SimpleUniverse is a Convenience Utility class SimpleUniverse simpleU = new SimpleUniverse(canvas3D); BranchGroup scene = createSceneGraph(simpleU); // This will move the ViewPlatform back a bit so the // objects in the scene can be viewed. simpleU.getViewingPlatform().setNominalViewingTransform(); simpleU.addBranchGraph(scene); new OtherView(simpleU.getLocale()); /* see note below */ } // end of BackgroundApp (constructor) /* * This class was created to make the boundingleaf work for this example * program. One OtherView object is created just a couple of lines above. * Inserting a second frame in the scene makes the BoundingLeaf object work * as desired. */ public class OtherView extends Object { public TransformGroup vpTrans; public OtherView(Locale locale) { GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); Canvas3D canvas3D = new Canvas3D(config); canvas3D.setStereoEnable(false); PhysicalBody body = new PhysicalBody(); PhysicalEnvironment environment = new PhysicalEnvironment(); View view = new View(); view.setPhysicalBody(body); view.setPhysicalEnvironment(environment); BranchGroup vpRoot = new BranchGroup(); Transform3D viewT3D = new Transform3D(); viewT3D.set(new Vector3f(0.0f, 0.0f, 2.0f)); ViewPlatform vp = new ViewPlatform(); vpTrans = new TransformGroup(viewT3D); vpTrans.addChild(vp); vpRoot.addChild(vpTrans); view.attachViewPlatform(vp); locale.addBranchGraph(vpRoot); } } // end of OtherView class // The following allows this to be run as an application // as well as an applet public static void main(String[] args) { System.out.println("BackgroundApp.java - a demonstration of placing geometry"); System.out.println("in the background of a Java 3D scene."); System.out.println("When the app loads, you can use the arrow keys to move."); System.out.println("The Java 3D Tutorial is available on the web at:"); System.out.println("http://java.sun.com/products/java-media/3D/collateral"); Frame frame = new MainFrame(new BackgroundApp(), 256, 256); } // end of main (method of BackgroundApp) } // end of class BackgroundApp