home *** CD-ROM | disk | FTP | other *** search
Java Source | 2003-08-08 | 5.8 KB | 175 lines |
- /*
- * @(#)LOD.java 1.13 02/10/21 13:44:04
- *
- * 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 java.awt.event.*;
- import com.sun.j3d.utils.applet.MainFrame;
- import com.sun.j3d.utils.geometry.*;
- import com.sun.j3d.utils.behaviors.vp.*;
- import com.sun.j3d.utils.universe.*;
- import javax.media.j3d.*;
- import javax.vecmath.*;
-
- public class LOD extends Applet {
-
- private SimpleUniverse u = null;
-
- public BranchGroup createSceneGraph() {
- // Create the root of the branch graph
- BranchGroup objRoot = new BranchGroup();
-
- createLights(objRoot);
-
- // 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);
- objRoot.addChild(objTrans);
-
- // Create a switch to hold the different levels of detail
- Switch sw = new Switch(0);
- sw.setCapability(javax.media.j3d.Switch.ALLOW_SWITCH_READ);
- sw.setCapability(javax.media.j3d.Switch.ALLOW_SWITCH_WRITE);
-
-
- // Create several levels for the switch, with less detailed
- // spheres for the ones which will be used when the sphere is
- // further away
- sw.addChild(new Sphere(0.4f, Sphere.GENERATE_NORMALS, 40));
- sw.addChild(new Sphere(0.4f, Sphere.GENERATE_NORMALS, 20));
- sw.addChild(new Sphere(0.4f, Sphere.GENERATE_NORMALS, 10));
- sw.addChild(new Sphere(0.4f, Sphere.GENERATE_NORMALS, 3));
-
- // Add the switch to the main group
- objTrans.addChild(sw);
-
- BoundingSphere bounds =
- new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
-
- // set up the DistanceLOD behavior
- float[] distances = new float[3];
- distances[0] = 5.0f;
- distances[1] = 10.0f;
- distances[2] = 25.0f;
- DistanceLOD lod = new DistanceLOD(distances);
- lod.addSwitch(sw);
- lod.setSchedulingBounds(bounds);
- objTrans.addChild(lod);
-
- // Have Java 3D perform optimizations on this scene graph.
- objRoot.compile();
-
- return objRoot;
- }
-
- private void createLights(BranchGroup graphRoot) {
-
- // Create a bounds for the light source influence
- BoundingSphere bounds =
- new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
-
- // Set up the global, ambient light
- Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
- AmbientLight aLgt = new AmbientLight(alColor);
- aLgt.setInfluencingBounds(bounds);
- graphRoot.addChild(aLgt);
-
- // Set up the directional (infinite) light source
- Color3f lColor1 = new Color3f(0.9f, 0.9f, 0.9f);
- Vector3f lDir1 = new Vector3f(1.0f, 1.0f, -1.0f);
- DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
- lgt1.setInfluencingBounds(bounds);
- graphRoot.addChild(lgt1);
- }
-
-
- public LOD() {
- }
-
- public void init() {
- setLayout(new BorderLayout());
- GraphicsConfiguration config =
- SimpleUniverse.getPreferredConfiguration();
-
- Canvas3D c = new Canvas3D(config);
- add("Center", c);
-
- // Create a simple scene and attach it to the virtual universe
- BranchGroup scene = createSceneGraph();
- u = new SimpleUniverse(c);
-
- // only add zoom mouse behavior to viewingPlatform
- ViewingPlatform viewingPlatform = u.getViewingPlatform();
-
- // This will move the ViewPlatform back a bit so the
- // objects in the scene can be viewed.
- viewingPlatform.setNominalViewingTransform();
-
- // add orbit behavior to the ViewingPlatform, but disable rotate
- // and translate
- OrbitBehavior orbit = new OrbitBehavior(c,
- OrbitBehavior.REVERSE_ZOOM |
- OrbitBehavior.DISABLE_ROTATE |
- OrbitBehavior.DISABLE_TRANSLATE);
- BoundingSphere bounds =
- new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
- orbit.setSchedulingBounds(bounds);
- viewingPlatform.setViewPlatformBehavior(orbit);
-
-
- u.addBranchGraph(scene);
- }
-
- public void destroy() {
- u.cleanup();
- }
-
- //
- // The following allows LOD to be run as an application
- // as well as an applet
- //
- public static void main(String[] args) {
- new MainFrame(new LOD(), 512, 512);
- }
- }
-