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Java Source | 2003-08-08 | 6.4 KB | 203 lines |
- /*
- * @(#)Viewer.java 1.14 02/10/21 13:44:30
- *
- * 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.applet.Applet;
- import java.awt.*;
-
- import javax.media.j3d.BranchGroup;
- import javax.media.j3d.Canvas3D;
- import javax.media.j3d.Transform3D;
- import javax.media.j3d.TransformGroup;
- import javax.media.j3d.View;
- import javax.vecmath.Matrix4d;
-
- import com.sun.j3d.loaders.lw3d.Lw3dLoader;
- import com.sun.j3d.loaders.Loader;
- import com.sun.j3d.loaders.Scene;
- import com.sun.j3d.utils.applet.MainFrame;
- import com.sun.j3d.utils.universe.SimpleUniverse;
-
-
- /**
- * This class loads in a Lightwave3D file and displays it in an applet
- * window. The application is fairly basic; a more complete version
- * of a Lightwave 3D loader might incorporate features such as
- * settable clip plane distances and animated views (these are both
- * possible with the current Lightwave 3D loader, they just need to
- * be implemented in the application).
- */
- public class Viewer extends Applet {
-
- private java.net.URL filename;
- private SimpleUniverse u;
-
- public Viewer(java.net.URL url) {
- filename = url;
- }
-
- public Viewer() {}
-
- public void init() {
- if (filename == null) {
- // the path to the file for an applet
- try {
- java.net.URL path = getCodeBase();
- filename = new java.net.URL(path.toString() +
- "./ballcone.lws");
- }
- catch (java.net.MalformedURLException ex) {
- System.err.println(ex.getMessage());
- ex.printStackTrace();
- System.exit(1);
- }
- }
-
- // Construct the Lw3d loader and load the file
- Loader lw3dLoader = new Lw3dLoader(Loader.LOAD_ALL);
- Scene loaderScene = null;
- try {
- loaderScene = lw3dLoader.load(filename);
- }
- catch (Exception e) {
- e.printStackTrace();
- System.exit(1);
- }
-
- // Construct the applet canvas
- setLayout(new BorderLayout());
- GraphicsConfiguration config =
- SimpleUniverse.getPreferredConfiguration();
-
- Canvas3D c = new Canvas3D(config);
- add("Center", c);
-
- // Create a basic universe setup and the root of our scene
- u = new SimpleUniverse(c);
- BranchGroup sceneRoot = new BranchGroup();
-
- // Change the back clip distance; the default is small for
- // some lw3d worlds
- View theView = u.getViewer().getView();
- theView.setBackClipDistance(50000f);
-
- // Now add the scene graph defined in the lw3d file
- if (loaderScene.getSceneGroup() != null) {
- // Instead of using the default view location (which may be
- // completely bogus for the particular file you're loading),
- // let's use the initial view from the file. We can get
- // this by getting the view groups from the scene (there's
- // only one for Lightwave 3D), then using the inverse of the
- // transform on that view as the transform for the entire scene.
-
- // First, get the view groups (shouldn't be null unless there
- // was something wrong in the load
- TransformGroup viewGroups[] = loaderScene.getViewGroups();
-
- // Get the Transform3D from the view and invert it
- Transform3D t = new Transform3D();
- viewGroups[0].getTransform(t);
- Matrix4d m = new Matrix4d();
- t.get(m);
- m.invert();
- t.set(m);
-
- // Now we've got the transform we want. Create an
- // appropriate TransformGroup and parent the scene to it.
- // Then insert the new group into the main BranchGroup.
- TransformGroup sceneTransform = new TransformGroup(t);
- sceneTransform.addChild(loaderScene.getSceneGroup());
- sceneRoot.addChild(sceneTransform);
- }
-
- // Make the scene graph live by inserting the root into the universe
- u.addBranchGraph(sceneRoot);
- }
-
-
- public void destroy() {
- u.cleanup();
- }
-
- /**
- * The main method of the application takes one argument in the
- * args array; the filname that you want to load. Note that the
- * file must be reachable from the directory in which you're running
- * this application.
- */
- public static void main(String args[]) {
- java.net.URL url = null;
- java.net.URL pathUrl = null;
- if (args.length > 0) {
- try {
- if ((args[0].indexOf("file:") == 0) ||
- (args[0].indexOf("http") == 0)) {
- url = new java.net.URL(args[0]);
- }
- else if (args[0].charAt(0) != '/') {
- url = new java.net.URL("file:./" + args[0]);
- }
- else {
- url = new java.net.URL("file:" + args[0]);
- }
- }
- catch (java.net.MalformedURLException ex) {
- System.err.println(ex.getMessage());
- ex.printStackTrace();
- System.exit(1);
- }
- }
- else {
- // the path to the image for an application
- try {
- url = new java.net.URL("file:./ballcone.lws");
- }
- catch (java.net.MalformedURLException ex) {
- System.err.println(ex.getMessage());
- ex.printStackTrace();
- System.exit(1);
- }
- }
- new MainFrame(new Viewer(url), 500, 500);
- }
- }
-
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