Java tutorial
/* * @(#)ConfigObjLoad.java 1.3 02/04/01 15:04:14 * * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistribution in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of Sun Microsystems, Inc. or the names of contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * 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. * * You acknowledge that Software is not designed,licensed or intended for use in * the design, construction, operation or maintenance of any nuclear facility. */ import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.io.FileNotFoundException; import java.net.MalformedURLException; import java.net.URL; import java.util.Map; import javax.media.j3d.Alpha; import javax.media.j3d.AmbientLight; import javax.media.j3d.Background; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.Sensor; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3f; import com.sun.j3d.loaders.IncorrectFormatException; import com.sun.j3d.loaders.ParsingErrorException; import com.sun.j3d.loaders.Scene; import com.sun.j3d.loaders.objectfile.ObjectFile; import com.sun.j3d.utils.behaviors.sensor.Mouse6DPointerBehavior; import com.sun.j3d.utils.behaviors.vp.OrbitBehavior; import com.sun.j3d.utils.universe.ConfiguredUniverse; import com.sun.j3d.utils.universe.ViewingPlatform; public class ConfigObjLoad { private boolean spin = false; private boolean noTriangulate = false; private boolean noStripify = false; private double creaseAngle = 60.0; private URL filename = null; private ConfiguredUniverse u; public BranchGroup createSceneGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); // Create a Transformgroup to scale all objects so they // appear in the scene. TransformGroup objScale = new TransformGroup(); Transform3D t3d = new Transform3D(); t3d.setScale(0.7); objScale.setTransform(t3d); objRoot.addChild(objScale); // Create the transform group node and initialize it to the // identity. Enable the TRANSFORM_WRITE capability so that // our behavior code can modify it at runtime. Add it to the // root of the subgraph. TransformGroup objTrans = new TransformGroup(); objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); objScale.addChild(objTrans); int flags = ObjectFile.RESIZE; if (!noTriangulate) flags |= ObjectFile.TRIANGULATE; if (!noStripify) flags |= ObjectFile.STRIPIFY; ObjectFile f = new ObjectFile(flags, (float) (creaseAngle * Math.PI / 180.0)); Scene s = null; try { s = f.load(filename); } catch (FileNotFoundException e) { System.err.println(e); System.exit(1); } catch (ParsingErrorException e) { System.err.println(e); System.exit(1); } catch (IncorrectFormatException e) { System.err.println(e); System.exit(1); } objTrans.addChild(s.getSceneGroup()); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); if (spin) { Transform3D yAxis = new Transform3D(); Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 4000, 0, 0, 0, 0, 0); RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f, (float) Math.PI * 2.0f); rotator.setSchedulingBounds(bounds); objTrans.addChild(rotator); } // Set up the background Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f); Background bgNode = new Background(bgColor); bgNode.setApplicationBounds(bounds); objRoot.addChild(bgNode); // Set up the ambient light Color3f ambientColor = new Color3f(0.1f, 0.1f, 0.1f); AmbientLight ambientLightNode = new AmbientLight(ambientColor); ambientLightNode.setInfluencingBounds(bounds); objRoot.addChild(ambientLightNode); // Set up the directional lights Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f); Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f); Color3f light2Color = new Color3f(1.0f, 1.0f, 1.0f); Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f); DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction); light1.setInfluencingBounds(bounds); objRoot.addChild(light1); DirectionalLight light2 = new DirectionalLight(light2Color, light2Direction); light2.setInfluencingBounds(bounds); objRoot.addChild(light2); return objRoot; } private void usage() { System.out.println("Usage: java ObjLoad [-s] [-n] [-t] [-c degrees] <.obj file>"); System.out.println(" -s Spin (no user interaction)"); System.out.println(" -n No triangulation"); System.out.println(" -t No stripification"); System.out.println(" -c Set crease angle for normal generation (default is 60 without"); System.out.println(" smoothing group info, otherwise 180 within smoothing groups)"); System.exit(0); } // End of usage public void init() { if (filename == null) { try { filename = new URL("file:galleon.obj"); } catch (MalformedURLException e) { System.err.println(e); System.exit(1); } } // Get the config file URL from the j3d.configURL property or use the // default config file "j3d1x1-window" in the current directory. URL configURL = ConfiguredUniverse.getConfigURL("file:j3d1x1-window"); // Create a simple scene and attach it to the virtual universe BranchGroup scene = createSceneGraph(); u = new ConfiguredUniverse(configURL); // Get the ViewingPlatform. ViewingPlatform viewingPlatform = u.getViewingPlatform(); // This will move the ViewPlatform back a bit so the objects in the // scene can be viewed. This will only have an effect if the config // file sets the window eyepoint policy to something other than // RELATIVE_TO_COEXISTENCE, which is the default eyepoint policy // applied by ConfiguredUniverse. // // The default view attach policy for ConfiguredUniverse applications // is NOMINAL_SCREEN. This sets the view platform origin in the // physical world to the center of coexistence, which allows eye // positions expressed relative to coexistence to see the appropriate // field of view automatically. viewingPlatform.setNominalViewingTransform(); // Add a ViewPlatformBehavior if not specified in the config file. if (!spin && viewingPlatform.getViewPlatformBehavior() == null) { OrbitBehavior orbit = new OrbitBehavior(u.getCanvas(), OrbitBehavior.REVERSE_ALL); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); orbit.setSchedulingBounds(bounds); viewingPlatform.setViewPlatformBehavior(orbit); } // See if there's a 6 degree of freedom mouse in the environment. // We look for one named "mouse6d". Map sensorMap = null; sensorMap = u.getNamedSensors(); if (sensorMap != null) { Sensor mouse6d = (Sensor) sensorMap.get("mouse6d"); if (mouse6d != null) { Mouse6DPointerBehavior behavior = new Mouse6DPointerBehavior(mouse6d, 1.0, true); BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); behavior.setSchedulingBounds(bounds); scene.addChild(behavior); scene.addChild(behavior.getEcho()); } } // Listen for a typed "q", "Q", or "Escape" key on each canvas to // allow a convenient exit from full screen configurations. Canvas3D[] canvases; canvases = u.getViewer().getCanvas3Ds(); class QuitListener extends KeyAdapter { public void keyTyped(KeyEvent e) { char c = e.getKeyChar(); if (c == 'q' || c == 'Q' || c == 27) System.exit(0); } } QuitListener quitListener = new QuitListener(); for (int i = 0; i < canvases.length; i++) canvases[i].addKeyListener(quitListener); // Make the scenegraph live. u.addBranchGraph(scene); } public ConfigObjLoad(String[] args) { if (args.length != 0) { for (int i = 0; i < args.length; i++) { if (args[i].startsWith("-")) { if (args[i].equals("-s")) { spin = true; } else if (args[i].equals("-n")) { noTriangulate = true; } else if (args[i].equals("-t")) { noStripify = true; } else if (args[i].equals("-c")) { if (i < args.length - 1) { creaseAngle = (new Double(args[++i])).doubleValue(); } else usage(); } else { usage(); } } else { try { if ((args[i].indexOf("file:") == 0) || (args[i].indexOf("http") == 0)) { filename = new URL(args[i]); } else if (args[i].charAt(0) != '/') { filename = new URL("file:./" + args[i]); } else { filename = new URL("file:" + args[i]); } } catch (MalformedURLException e) { System.err.println(e); System.exit(1); } } } } init(); } public static void main(String[] args) { new ConfigObjLoad(args); } }