This application demonstrates the use of 3D sound
/*
Essential Java 3D Fast
Ian Palmer
Publisher: Springer-Verlag
ISBN: 1-85233-394-4
*/
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.BackgroundSound;
import javax.media.j3d.BoundingLeaf;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Locale;
import javax.media.j3d.Material;
import javax.media.j3d.MediaContainer;
import javax.media.j3d.PhysicalBody;
import javax.media.j3d.PhysicalEnvironment;
import javax.media.j3d.PointSound;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.View;
import javax.media.j3d.ViewPlatform;
import javax.media.j3d.VirtualUniverse;
import javax.vecmath.Color3f;
import javax.vecmath.Point2f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.audioengines.javasound.JavaSoundMixer;
import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior;
import com.sun.j3d.utils.geometry.Box;
/**
* This application demonstrates the use of 3D sound. It loads three sounds:
* loop3.wav is an ambient background sound and loop1.wav and loop2.wav are
* point sounds. The two point sounds can be switched on and off use AWT
* buttons. The user can navigate around the scene using the keyboard.
*
* @author I.J.Palmer
* @version 1.0
*/
public class SimpleSounds extends Frame implements ActionListener {
protected Canvas3D myCanvas3D = new Canvas3D(null);
/** The exit button to quit the application */
protected Button exitButton = new Button("Exit");
/** The button to switch on and off the first sound */
protected Button sound1Button = new Button("Sound 1");
/** The button to switch on and off the second sound */
protected Button sound2Button = new Button("Sound 2");
protected BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0,
0.0), 10000.0);
//Create the two point sounds
PointSound sound1 = new PointSound();
PointSound sound2 = new PointSound();
/**
* Build the view branch of the scene graph. In this case a key navigation
* utility object is created and associated with the view transform so that
* the view can be changed via the keyboard.
*
* @return BranchGroup that is the root of the view branch
*/
protected BranchGroup buildViewBranch(Canvas3D c) {
BranchGroup viewBranch = new BranchGroup();
Transform3D viewXfm = new Transform3D();
viewXfm.set(new Vector3f(0.0f, 0.0f, 30.0f));
TransformGroup viewXfmGroup = new TransformGroup(viewXfm);
viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
ViewPlatform myViewPlatform = new ViewPlatform();
BoundingSphere movingBounds = new BoundingSphere(new Point3d(0.0, 0.0,
0.0), 100.0);
BoundingLeaf boundLeaf = new BoundingLeaf(movingBounds);
PhysicalBody myBody = new PhysicalBody();
PhysicalEnvironment myEnvironment = new PhysicalEnvironment();
viewXfmGroup.addChild(myViewPlatform);
viewBranch.addChild(viewXfmGroup);
View myView = new View();
myView.addCanvas3D(c);
myView.attachViewPlatform(myViewPlatform);
myView.setPhysicalBody(myBody);
myView.setPhysicalEnvironment(myEnvironment);
KeyNavigatorBehavior keyNav = new KeyNavigatorBehavior(viewXfmGroup);
keyNav.setSchedulingBounds(movingBounds);
viewBranch.addChild(keyNav);
//Create a sounds mixer to use our sounds with
//and initialise it
JavaSoundMixer myMixer = new JavaSoundMixer(myEnvironment);
myMixer.initialize();
return viewBranch;
}
/**
* Add some lights to the scene graph
*
* @param b
* BranchGroup that the lights are added to
*/
protected void addLights(BranchGroup b) {
Color3f ambLightColour = new Color3f(0.5f, 0.5f, 0.5f);
AmbientLight ambLight = new AmbientLight(ambLightColour);
ambLight.setInfluencingBounds(bounds);
Color3f dirLightColour = new Color3f(1.0f, 1.0f, 1.0f);
Vector3f dirLightDir = new Vector3f(-1.0f, -1.0f, -1.0f);
DirectionalLight dirLight = new DirectionalLight(dirLightColour,
dirLightDir);
dirLight.setInfluencingBounds(bounds);
b.addChild(ambLight);
b.addChild(dirLight);
}
/**
* This adds a continuous background sound to the branch group.
*
* @param b
* BranchGroup to add the sound to.
* @param soundFile
* String that is the name of the sound file.
*/
protected void addBackgroundSound(BranchGroup b, String soundFile) {
//Create a media container to load the file
MediaContainer droneContainer = new MediaContainer(soundFile);
//Create the background sound from the media container
BackgroundSound drone = new BackgroundSound(droneContainer, 1.0f);
//Activate the sound
drone.setSchedulingBounds(bounds);
drone.setEnable(true);
//Set the sound to loop forever
drone.setLoop(BackgroundSound.INFINITE_LOOPS);
//Add it to the group
b.addChild(drone);
}
/**
* Add a sound to the transform group. This takes a point sound object and
* loads into it a sounds from a given file. The edge of the sound's extent
* is also defined in a parameter.
*
* @param tg
* TransformGroup that the sound is to be added to
* @param sound
* PointSound to be used
* @param soundFile
* String that is the name of the sound file to be loaded
* @param edge
* float that represents the sound's maximum extent
*/
protected void addObjectSound(TransformGroup tg, PointSound sound,
String soundFile, float edge) {
//First we get the current transform so that we can
//position the sound in the same place
Transform3D objXfm = new Transform3D();
Vector3f objPosition = new Vector3f();
tg.getTransform(objXfm);
objXfm.get(objPosition);
//Create the media container to load the sound
MediaContainer soundContainer = new MediaContainer(soundFile);
//Use the loaded data in the sound
sound.setSoundData(soundContainer);
sound.setInitialGain(1.0f);
//Set the position to that of the given transform
sound.setPosition(new Point3f(objPosition));
//Allow use to switch the sound on and off
sound.setCapability(PointSound.ALLOW_ENABLE_READ);
sound.setCapability(PointSound.ALLOW_ENABLE_WRITE);
sound.setSchedulingBounds(bounds);
//Set it off to start with
sound.setEnable(false);
//Set it to loop forever
sound.setLoop(BackgroundSound.INFINITE_LOOPS);
//Use the edge value to set to extent of the sound
Point2f[] attenuation = { new Point2f(0.0f, 1.0f),
new Point2f(edge, 0.1f) };
sound.setDistanceGain(attenuation);
//Add the sound to the transform group
tg.addChild(sound);
}
protected BranchGroup buildContentBranch() {
//Create the appearance
Appearance app = new Appearance();
Color3f ambientColour = new Color3f(1.0f, 0.0f, 0.0f);
Color3f emissiveColour = new Color3f(0.0f, 0.0f, 0.0f);
Color3f specularColour = new Color3f(1.0f, 1.0f, 1.0f);
Color3f diffuseColour = new Color3f(1.0f, 0.0f, 0.0f);
float shininess = 20.0f;
app.setMaterial(new Material(ambientColour, emissiveColour,
diffuseColour, specularColour, shininess));
//Make the cube
Box myCube = new Box(1.0f, 1.0f, 1.0f, app);
TransformGroup cubeGroup = new TransformGroup();
BranchGroup contentBranch = new BranchGroup();
addLights(contentBranch);
addObjectSound(cubeGroup, sound1, new String("file:./loop1.wav"), 10.0f);
addObjectSound(cubeGroup, sound2, new String("file:./loop2.wav"), 20.0f);
addBackgroundSound(contentBranch, new String("file:./loop3.wav"));
cubeGroup.addChild(myCube);
contentBranch.addChild(cubeGroup);
return contentBranch;
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == exitButton) {
dispose();
System.exit(0);
} else if (e.getSource() == sound1Button) {
if (sound1.getEnable())
sound1.setEnable(false);
else
sound1.setEnable(true);
} else if (e.getSource() == sound2Button) {
sound2.setEnable(!sound2.getEnable());
}
}
public SimpleSounds() {
VirtualUniverse myUniverse = new VirtualUniverse();
Locale myLocale = new Locale(myUniverse);
// buildUniverse(myCanvas3D);
myLocale.addBranchGraph(buildContentBranch());
myLocale.addBranchGraph(buildViewBranch(myCanvas3D));
setTitle("SimpleSounds");
setSize(400, 400);
setLayout(new BorderLayout());
Panel bottom = new Panel();
bottom.add(sound1Button);
bottom.add(sound2Button);
bottom.add(exitButton);
add(BorderLayout.CENTER, myCanvas3D);
add(BorderLayout.SOUTH, bottom);
exitButton.addActionListener(this);
sound1Button.addActionListener(this);
sound2Button.addActionListener(this);
setVisible(true);
}
public static void main(String[] args) {
SimpleSounds sw = new SimpleSounds();
}
}
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