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/*
* $RCSfile$
*
* Copyright (c) 2004 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:
*
* - Redistribution 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 MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS 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 THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
* $Revision$
* $Date$
* $State$
*/
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);
}
}
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