Mega Code Archive
A range of Interpolators and switches between
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/**********************************************************
Copyright (C) 2001 Daniel Selman
First distributed with the book "Java 3D Programming"
by Daniel Selman and published by Manning Publications.
http://manning.com/selman
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The license can be found on the WWW at:
http://www.fsf.org/copyleft/gpl.html
Or by writing to:
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Authors can be contacted at:
Daniel Selman: daniel@selman.org
If you make changes you think others would like, please
contact one of the authors or someone at the
www.j3d.org web site.
**************************************************************/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GraphicsConfigTemplate;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.io.File;
import java.net.URL;
import javax.media.j3d.Alpha;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.AudioDevice;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.ColorInterpolator;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.GraphicsConfigTemplate3D;
import javax.media.j3d.Group;
import javax.media.j3d.Interpolator;
import javax.media.j3d.Locale;
import javax.media.j3d.Material;
import javax.media.j3d.PhysicalBody;
import javax.media.j3d.PhysicalEnvironment;
import javax.media.j3d.PositionInterpolator;
import javax.media.j3d.RotPosScalePathInterpolator;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.ScaleInterpolator;
import javax.media.j3d.Switch;
import javax.media.j3d.SwitchValueInterpolator;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.TransparencyAttributes;
import javax.media.j3d.TransparencyInterpolator;
import javax.media.j3d.View;
import javax.media.j3d.ViewPlatform;
import javax.media.j3d.VirtualUniverse;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Quat4f;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;
import com.sun.j3d.audioengines.javasound.JavaSoundMixer;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.geometry.Text2D;
/**
* This example creates a range of Interpolators and switches between them using
* a SwitchInterpolator
*/
public class InterpolatorTest extends Java3dApplet {
private static int m_kWidth = 400;
private static int m_kHeight = 400;
public InterpolatorTest() {
initJava3d();
}
// scale eveything up so that moving from 0 to 1
// is significant
protected double getScale() {
return 10.0;
}
// we want a black background
protected Background createBackground() {
return null;
}
protected BranchGroup createSceneBranchGroup() {
BranchGroup objRoot = super.createSceneBranchGroup();
// create a root TG in case we need to scale the scene
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
// create the Appearance for the Shape3D
Appearance app = new Appearance();
// create a Material, modified by the ColorInterpolator
Color3f objColor = new Color3f(1.0f, 0.7f, 0.8f);
Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
Material mat = new Material(objColor, black, objColor, black, 80.0f);
mat.setCapability(Material.ALLOW_COMPONENT_WRITE);
app.setMaterial(mat);
// create a TransparencyAttributes, modified by the
// TransparencyInterpolator
TransparencyAttributes transparency = new TransparencyAttributes();
transparency.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
transparency.setTransparencyMode(TransparencyAttributes.NICEST);
app.setTransparencyAttributes(transparency);
// create a Switch Node and set capabilities
Switch switchNode = new Switch();
switchNode.setCapability(Switch.ALLOW_SWITCH_WRITE);
// create a Alpha object for the Interpolators
Alpha alpha = new Alpha(-1, Alpha.INCREASING_ENABLE
| Alpha.DECREASING_ENABLE, 500, 100, 5000, 2000, 1000, 5000,
2000, 500);
// add each BG and Interpolator as a child of the Switch Node
TransformGroup tg = createSharedGroup(app);
switchNode.addChild(createBranchGroup(tg, new ColorInterpolator(alpha,
app.getMaterial())));
tg = createSharedGroup(app);
switchNode.addChild(createBranchGroup(tg, new PositionInterpolator(
alpha, tg)));
tg = createSharedGroup(app);
switchNode.addChild(createBranchGroup(tg, new RotationInterpolator(
alpha, tg)));
tg = createSharedGroup(app);
switchNode.addChild(createBranchGroup(tg, new ScaleInterpolator(alpha,
tg)));
tg = createSharedGroup(app);
switchNode.addChild(createBranchGroup(tg, new TransparencyInterpolator(
alpha, app.getTransparencyAttributes(), 0, 0.8f)));
// define the data for the RotPosScalePathInterpolator
float[] knots = { 0.0f, 0.1f, 0.2f, 0.3f, 0.4f, 0.6f, 0.8f, 0.9f, 1.0f };
float[] scales = { 0.2f, 0.5f, 0.8f, 2.3f, 5.4f, 0.6f, 0.4f, 0.2f, 0.1f };
Quat4f[] quats = new Quat4f[9];
Point3f[] positions = new Point3f[9];
quats[0] = new Quat4f(0.3f, 1.0f, 1.0f, 0.0f);
quats[1] = new Quat4f(1.0f, 0.0f, 0.0f, 0.3f);
quats[2] = new Quat4f(0.2f, 1.0f, 0.0f, 0.0f);
quats[3] = new Quat4f(0.0f, 0.2f, 1.0f, 0.0f);
quats[4] = new Quat4f(1.0f, 0.0f, 0.4f, 0.0f);
quats[5] = new Quat4f(0.0f, 1.0f, 1.0f, 0.2f);
quats[6] = new Quat4f(0.3f, 0.3f, 0.0f, 0.0f);
quats[7] = new Quat4f(1.0f, 0.0f, 1.0f, 1.0f);
quats[8] = quats[0];
positions[0] = new Point3f(0.0f, 0.0f, -1.0f);
positions[1] = new Point3f(1.0f, -2.0f, -2.0f);
positions[2] = new Point3f(-2.0f, 2.0f, -3.0f);
positions[3] = new Point3f(1.0f, 1.0f, -4.0f);
positions[4] = new Point3f(-4.0f, -2.0f, -5.0f);
positions[5] = new Point3f(2.0f, 0.3f, -6.0f);
positions[6] = new Point3f(-4.0f, 0.5f, -7.0f);
positions[7] = new Point3f(0.0f, -1.5f, -4.0f);
positions[8] = positions[0];
tg = createSharedGroup(app);
// create the Interpolator
RotPosScalePathInterpolator rotPosScalePathInterplator = new RotPosScalePathInterpolator(
alpha, tg, new Transform3D(), knots, quats, positions, scales);
// add a BG for the Interpolator
switchNode.addChild(createBranchGroup(tg, rotPosScalePathInterplator));
// create a RandomAlpha object to control a SwitchInterpolator
// to set the Switches active child node randomly
RandomAlpha randomAlpha = new RandomAlpha();
// create the interpolator
SwitchValueInterpolator switchInterpolator = new SwitchValueInterpolator(
randomAlpha, switchNode);
switchInterpolator.setSchedulingBounds(getApplicationBounds());
// connect the scenegraph
objTrans.addChild(switchNode);
objTrans.addChild(switchInterpolator);
// Set up the global lights
Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
AmbientLight aLgt = new AmbientLight(alColor);
aLgt.setInfluencingBounds(getApplicationBounds());
DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
lgt1.setInfluencingBounds(getApplicationBounds());
// add the lights
objRoot.addChild(aLgt);
objRoot.addChild(lgt1);
// connect
objRoot.addChild(objTrans);
return objRoot;
}
// creates a BG containing:
// - a Link to the SharedGroup
// - The Interpolator
// - a Text2D label of the name of the Interpolator
private BranchGroup createBranchGroup(TransformGroup bgShared,
Interpolator interpolator) {
BranchGroup bg = new BranchGroup();
bg.addChild(bgShared);
bg.addChild(interpolator);
interpolator.setSchedulingBounds(getApplicationBounds());
// strip the package name from szClass (everything before the final ".")
String szClass = interpolator.getClass().getName();
int nIndex = szClass.lastIndexOf(".");
String szTrimedClass = szClass;
if (nIndex > -1)
szTrimedClass = szClass.substring(nIndex + 1, szClass.length());
Text2D text = new Text2D(szTrimedClass, new Color3f(1, 1, 1),
"SansSerif", 20, Font.PLAIN);
bg.addChild(text);
return bg;
}
// create a SharedGroup and populate with some child nodes
private TransformGroup createSharedGroup(Appearance app) {
TransformGroup tg = new TransformGroup();
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
tg.addChild(createGeometry(app, -0.5, -0.5, 0));
tg.addChild(createGeometry(app, -0.5, 0.5, 0));
tg.addChild(createGeometry(app, 0.5, 0.5, 0));
tg.addChild(createGeometry(app, 0.5, -0.5, 0));
return tg;
}
// create and position a Sphere using a parent TransformGroup
TransformGroup createGeometry(Appearance app, double x, double y, double z) {
Transform3D t3d = new Transform3D();
t3d.setTranslation(new Vector3d(x, y, z));
TransformGroup tg = new TransformGroup(t3d);
tg.addChild(new Sphere(0.1f, Primitive.GENERATE_NORMALS, app));
return tg;
}
public static void main(String[] args) {
InterpolatorTest interpolatorTest = new InterpolatorTest();
interpolatorTest.saveCommandLineArguments(args);
new MainFrame(interpolatorTest, m_kWidth, m_kHeight);
}
}
//this class defines an Alpha class that returns a random
//value every N milliseconds.
class RandomAlpha extends Alpha {
protected long m_LastQueryTime = 0;
protected float m_Alpha = 0;
protected final int m_kUpdateInterval = 10000;
public RandomAlpha() {
}
// core method override
// returns the Alpha value for a given time
public float value(long time) {
if (System.currentTimeMillis() - m_LastQueryTime > m_kUpdateInterval) {
m_LastQueryTime = System.currentTimeMillis();
m_Alpha = (float) Math.random();
}
return m_Alpha;
}
}
/*******************************************************************************
* Copyright (C) 2001 Daniel Selman
*
* First distributed with the book "Java 3D Programming" by Daniel Selman and
* published by Manning Publications. http://manning.com/selman
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* The license can be found on the WWW at: http://www.fsf.org/copyleft/gpl.html
*
* Or by writing to: Free Software Foundation, Inc., 59 Temple Place - Suite
* 330, Boston, MA 02111-1307, USA.
*
* Authors can be contacted at: Daniel Selman: daniel@selman.org
*
* If you make changes you think others would like, please contact one of the
* authors or someone at the www.j3d.org web site.
******************************************************************************/
//*****************************************************************************
/**
* Java3dApplet
*
* Base class for defining a Java 3D applet. Contains some useful methods for
* defining views and scenegraphs etc.
*
* @author Daniel Selman
* @version 1.0
*/
//*****************************************************************************
abstract class Java3dApplet extends Applet {
public static int m_kWidth = 300;
public static int m_kHeight = 300;
protected String[] m_szCommandLineArray = null;
protected VirtualUniverse m_Universe = null;
protected BranchGroup m_SceneBranchGroup = null;
protected Bounds m_ApplicationBounds = null;
// protected com.tornadolabs.j3dtree.Java3dTree m_Java3dTree = null;
public Java3dApplet() {
}
public boolean isApplet() {
try {
System.getProperty("user.dir");
System.out.println("Running as Application.");
return false;
} catch (Exception e) {
}
System.out.println("Running as Applet.");
return true;
}
public URL getWorkingDirectory() throws java.net.MalformedURLException {
URL url = null;
try {
File file = new File(System.getProperty("user.dir"));
System.out.println("Running as Application:");
System.out.println(" " + file.toURL());
return file.toURL();
} catch (Exception e) {
}
System.out.println("Running as Applet:");
System.out.println(" " + getCodeBase());
return getCodeBase();
}
public VirtualUniverse getVirtualUniverse() {
return m_Universe;
}
//public com.tornadolabs.j3dtree.Java3dTree getJ3dTree() {
//return m_Java3dTree;
// }
public Locale getFirstLocale() {
java.util.Enumeration e = m_Universe.getAllLocales();
if (e.hasMoreElements() != false)
return (Locale) e.nextElement();
return null;
}
protected Bounds getApplicationBounds() {
if (m_ApplicationBounds == null)
m_ApplicationBounds = createApplicationBounds();
return m_ApplicationBounds;
}
protected Bounds createApplicationBounds() {
m_ApplicationBounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
100.0);
return m_ApplicationBounds;
}
protected Background createBackground() {
Background back = new Background(new Color3f(0.9f, 0.9f, 0.9f));
back.setApplicationBounds(createApplicationBounds());
return back;
}
public void initJava3d() {
// m_Java3dTree = new com.tornadolabs.j3dtree.Java3dTree();
m_Universe = createVirtualUniverse();
Locale locale = createLocale(m_Universe);
BranchGroup sceneBranchGroup = createSceneBranchGroup();
ViewPlatform vp = createViewPlatform();
BranchGroup viewBranchGroup = createViewBranchGroup(
getViewTransformGroupArray(), vp);
createView(vp);
Background background = createBackground();
if (background != null)
sceneBranchGroup.addChild(background);
// m_Java3dTree.recursiveApplyCapability(sceneBranchGroup);
// m_Java3dTree.recursiveApplyCapability(viewBranchGroup);
locale.addBranchGraph(sceneBranchGroup);
addViewBranchGroup(locale, viewBranchGroup);
onDoneInit();
}
protected void onDoneInit() {
// m_Java3dTree.updateNodes(m_Universe);
}
protected double getScale() {
return 1.0;
}
public TransformGroup[] getViewTransformGroupArray() {
TransformGroup[] tgArray = new TransformGroup[1];
tgArray[0] = new TransformGroup();
// move the camera BACK a little...
// note that we have to invert the matrix as
// we are moving the viewer
Transform3D t3d = new Transform3D();
t3d.setScale(getScale());
t3d.setTranslation(new Vector3d(0.0, 0.0, -20.0));
t3d.invert();
tgArray[0].setTransform(t3d);
return tgArray;
}
protected void addViewBranchGroup(Locale locale, BranchGroup bg) {
locale.addBranchGraph(bg);
}
protected Locale createLocale(VirtualUniverse u) {
return new Locale(u);
}
protected BranchGroup createSceneBranchGroup() {
m_SceneBranchGroup = new BranchGroup();
return m_SceneBranchGroup;
}
protected View createView(ViewPlatform vp) {
View view = new View();
PhysicalBody pb = createPhysicalBody();
PhysicalEnvironment pe = createPhysicalEnvironment();
AudioDevice audioDevice = createAudioDevice(pe);
if (audioDevice != null) {
pe.setAudioDevice(audioDevice);
audioDevice.initialize();
}
view.setPhysicalEnvironment(pe);
view.setPhysicalBody(pb);
if (vp != null)
view.attachViewPlatform(vp);
view.setBackClipDistance(getBackClipDistance());
view.setFrontClipDistance(getFrontClipDistance());
Canvas3D c3d = createCanvas3D();
view.addCanvas3D(c3d);
addCanvas3D(c3d);
return view;
}
protected PhysicalBody createPhysicalBody() {
return new PhysicalBody();
}
protected AudioDevice createAudioDevice(PhysicalEnvironment pe) {
JavaSoundMixer javaSoundMixer = new JavaSoundMixer(pe);
if (javaSoundMixer == null)
System.out.println("create of audiodevice failed");
return javaSoundMixer;
}
protected PhysicalEnvironment createPhysicalEnvironment() {
return new PhysicalEnvironment();
}
protected float getViewPlatformActivationRadius() {
return 100;
}
protected ViewPlatform createViewPlatform() {
ViewPlatform vp = new ViewPlatform();
vp.setViewAttachPolicy(View.RELATIVE_TO_FIELD_OF_VIEW);
vp.setActivationRadius(getViewPlatformActivationRadius());
return vp;
}
protected Canvas3D createCanvas3D() {
GraphicsConfigTemplate3D gc3D = new GraphicsConfigTemplate3D();
gc3D.setSceneAntialiasing(GraphicsConfigTemplate.PREFERRED);
GraphicsDevice gd[] = GraphicsEnvironment.getLocalGraphicsEnvironment()
.getScreenDevices();
Canvas3D c3d = new Canvas3D(gd[0].getBestConfiguration(gc3D));
c3d.setSize(getCanvas3dWidth(c3d), getCanvas3dHeight(c3d));
return c3d;
}
protected int getCanvas3dWidth(Canvas3D c3d) {
return m_kWidth;
}
protected int getCanvas3dHeight(Canvas3D c3d) {
return m_kHeight;
}
protected double getBackClipDistance() {
return 100.0;
}
protected double getFrontClipDistance() {
return 1.0;
}
protected BranchGroup createViewBranchGroup(TransformGroup[] tgArray,
ViewPlatform vp) {
BranchGroup vpBranchGroup = new BranchGroup();
if (tgArray != null && tgArray.length > 0) {
Group parentGroup = vpBranchGroup;
TransformGroup curTg = null;
for (int n = 0; n < tgArray.length; n++) {
curTg = tgArray[n];
parentGroup.addChild(curTg);
parentGroup = curTg;
}
tgArray[tgArray.length - 1].addChild(vp);
} else
vpBranchGroup.addChild(vp);
return vpBranchGroup;
}
protected void addCanvas3D(Canvas3D c3d) {
setLayout(new BorderLayout());
add(c3d, BorderLayout.CENTER);
doLayout();
}
protected VirtualUniverse createVirtualUniverse() {
return new VirtualUniverse();
}
protected void saveCommandLineArguments(String[] szArgs) {
m_szCommandLineArray = szArgs;
}
protected String[] getCommandLineArguments() {
return m_szCommandLineArray;
}
}
]]>