Background Geometry
/*
* @(#)BackgroundGeometry.java 1.11 02/10/21 13:37:48
*
* Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
*
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* modification, are permitted provided that the following conditions are met:
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* this list of conditions and the following disclaimer.
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* 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
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* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
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*/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.Appearance;
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.Material;
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.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;
import com.sun.j3d.utils.behaviors.mouse.MouseZoom;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.universe.SimpleUniverse;
public class BackgroundGeometry extends Applet {
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
100.0);
private java.net.URL bgImage = null;
private SimpleUniverse u = null;
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(0.4);
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.
TransformGroup objTrans = new TransformGroup();
objScale.addChild(objTrans);
Background bg = new Background();
bg.setApplicationBounds(bounds);
BranchGroup backGeoBranch = new BranchGroup();
Sphere sphereObj = new Sphere(1.0f, Sphere.GENERATE_NORMALS
| Sphere.GENERATE_NORMALS_INWARD
| Sphere.GENERATE_TEXTURE_COORDS, 45);
Appearance backgroundApp = sphereObj.getAppearance();
backGeoBranch.addChild(sphereObj);
bg.setGeometry(backGeoBranch);
objTrans.addChild(bg);
TextureLoader tex = new TextureLoader(bgImage, new String("RGB"), this);
if (tex != null)
backgroundApp.setTexture(tex.getTexture());
Vector3f tranlation = new Vector3f(2.0f, 0.0f, 0.0f);
Transform3D modelTransform = new Transform3D();
Transform3D tmpTransform = new Transform3D();
double angleInc = Math.PI / 8.0;
double angle = 0.0;
int numBoxes = 16;
float scaleX[] = { 0.1f, 0.2f, 0.2f, 0.3f, 0.2f, 0.1f, 0.2f, 0.3f,
0.1f, 0.3f, 0.2f, 0.3f, 0.1f, 0.3f, 0.2f, 0.3f };
float scaleY[] = { 0.3f, 0.4f, 0.3f, 0.4f, 0.3f, 0.4f, 0.3f, 0.4f,
0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.4f };
float scaleZ[] = { 0.3f, 0.2f, 0.1f, 0.1f, 0.3f, 0.2f, 0.1f, 0.3f,
0.3f, 0.2f, 0.1f, 0.3f, 0.3f, 0.2f, 0.1f, 0.2f };
Appearance a1 = new Appearance();
Color3f eColor = new Color3f(0.0f, 0.0f, 0.0f);
Color3f sColor = new Color3f(0.5f, 0.5f, 1.0f);
Color3f oColor = new Color3f(0.5f, 0.5f, 0.3f);
Material m = new Material(oColor, eColor, oColor, sColor, 100.0f);
m.setLightingEnable(true);
a1.setMaterial(m);
for (int i = 0; i < numBoxes; i++, angle += angleInc) {
modelTransform.rotY(angle);
tmpTransform.set(tranlation);
modelTransform.mul(tmpTransform);
TransformGroup tgroup = new TransformGroup(modelTransform);
objTrans.addChild(tgroup);
tgroup.addChild(new Box(scaleX[i], scaleY[i], scaleZ[i],
Box.GENERATE_NORMALS, a1));
}
// Shine it with two lights.
Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
Color3f lColor2 = new Color3f(0.2f, 0.2f, 0.1f);
Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
Vector3f lDir2 = new Vector3f(0.0f, 0.0f, -1.0f);
DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
DirectionalLight lgt2 = new DirectionalLight(lColor2, lDir2);
lgt1.setInfluencingBounds(bounds);
lgt2.setInfluencingBounds(bounds);
objScale.addChild(lgt1);
objScale.addChild(lgt2);
return objRoot;
}
public BackgroundGeometry() {
}
public BackgroundGeometry(java.net.URL bgurl) {
bgImage = bgurl;
}
public void init() {
if (bgImage == null) {
// the path to the image for an applet
try {
bgImage = new java.net.URL(getCodeBase().toString()
+ "/bg.jpg");
} catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
setLayout(new BorderLayout());
GraphicsConfiguration config = SimpleUniverse
.getPreferredConfiguration();
Canvas3D c = new Canvas3D(config);
add("Center", c);
BranchGroup scene = createSceneGraph();
u = new SimpleUniverse(c);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
u.getViewingPlatform().setNominalViewingTransform();
TransformGroup viewTrans = u.getViewingPlatform()
.getViewPlatformTransform();
// Create the rotate behavior node
MouseRotate behavior1 = new MouseRotate(viewTrans);
scene.addChild(behavior1);
behavior1.setSchedulingBounds(bounds);
// Create the zoom behavior node
MouseZoom behavior2 = new MouseZoom(viewTrans);
scene.addChild(behavior2);
behavior2.setSchedulingBounds(bounds);
// Create the translate behavior node
MouseTranslate behavior3 = new MouseTranslate(viewTrans);
scene.addChild(behavior3);
behavior3.setSchedulingBounds(bounds);
// Let Java 3D perform optimizations on this scene graph.
scene.compile();
u.addBranchGraph(scene);
}
public void destroy() {
u.cleanup();
}
public static void main(String argv[]) {
System.out
.println("Usage: mouse buttons to rotate, zoom or translate the view platform transform");
System.out
.println(" Note that the background geometry only changes with rotation");
// the path to the image file for an application
java.net.URL bgurl = null;
try {
bgurl = new java.net.URL("file:bg.jpg");
} catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
new MainFrame(new BackgroundGeometry(bgurl), 750, 750);
}
}
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