Example usage for javax.media.j3d Transform3D Transform3D

List of usage examples for javax.media.j3d Transform3D Transform3D

Introduction

In this page you can find the example usage for javax.media.j3d Transform3D Transform3D.

Prototype

public Transform3D() 

Source Link

Document

Constructs and initializes a transform to the identity matrix.

Usage

From source file:LightTest.java

protected BranchGroup createSceneBranchGroup() {
    BranchGroup objRoot = super.createSceneBranchGroup();

    // create the 4 lights - the actual creation
    // and UI managment is delegated to an object
    // that "shadows" (no pun intended) the functionality
    // of the particular light
    createLight(new AmbientLightObject(), objRoot);
    createLight(new PointLightObject(), objRoot);
    createLight(new DirectionalLightObject(), objRoot);
    createLight(new SpotLightObject(), objRoot);

    // rotate some of the spheres in the scene
    TransformGroup objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

    Transform3D yAxis = new Transform3D();
    Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 4000, 0, 0, 0, 0, 0);

    RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f,
            (float) Math.PI * 2.0f);
    rotator.setSchedulingBounds(getApplicationBounds());
    objTrans.addChild(rotator);//from w w  w .  ja va  2  s  . c  o  m

    // create a large sphere in the center of the
    // scene and the floor as staionary objects
    objRoot.addChild(createSphere(0, 0, 0, 2));
    objRoot.addChild(createFloor());

    // create a smaller sphere at the corners of a cube
    final int nCubeSize = 3;
    objTrans.addChild(createSphere(nCubeSize, nCubeSize, nCubeSize, 1));
    objTrans.addChild(createSphere(nCubeSize, nCubeSize, -nCubeSize, 1));
    objTrans.addChild(createSphere(nCubeSize, -nCubeSize, nCubeSize, 1));
    objTrans.addChild(createSphere(nCubeSize, -nCubeSize, -nCubeSize, 1));
    objTrans.addChild(createSphere(-nCubeSize, nCubeSize, nCubeSize, 1));
    objTrans.addChild(createSphere(-nCubeSize, nCubeSize, -nCubeSize, 1));
    objTrans.addChild(createSphere(-nCubeSize, -nCubeSize, nCubeSize, 1));
    objTrans.addChild(createSphere(-nCubeSize, -nCubeSize, -nCubeSize, 1));

    // add some small spheres here and there to
    // make things interesting
    objRoot.addChild(createSphere(-6, -6, 2, 1));
    objRoot.addChild(createSphere(8, -5, 3, 1));
    objRoot.addChild(createSphere(6, 7, -1, 1));
    objRoot.addChild(createSphere(-5, 6, -3.5f, 0.5f));

    objRoot.addChild(objTrans);

    return objRoot;
}

From source file:SimpleTransform.java

/**
 * This processes the AWT events and performs the appropriate operations.
 * The exit button causes the program to terminate, the left button causes a
 * rotation to be applied to the shape's transformation to spin it to the
 * left and the right has the similar effect but to the right button.
 * // w  w  w.  j  ava2  s .c o  m
 * @param e
 *            ActionEvent that has been performed
 */
public void actionPerformed(ActionEvent e) {
    if (e.getSource() == exitButton) {
        dispose();
        System.exit(0);
    } else if (e.getSource() == leftButton) {
        //Create a temporary transform
        Transform3D temp = new Transform3D();
        //Read the transform from the shape
        rotationGroup.getTransform(temp);
        //Create a rotation that will be applied
        Transform3D tempDelta = new Transform3D();
        tempDelta.rotY(-0.3);
        //Apply the rotation
        temp.mul(tempDelta);
        //Write the value back into the scene graph
        rotationGroup.setTransform(temp);
    } else if (e.getSource() == rightButton) {
        //Do the same for the right rotation
        Transform3D temp = new Transform3D();
        rotationGroup.getTransform(temp);
        Transform3D tempDelta = new Transform3D();
        tempDelta.rotY(0.3);
        temp.mul(tempDelta);
        rotationGroup.setTransform(temp);
    }
}

From source file:SimpleSounds.java

/**
 * 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./*from   www.  j av a  2  s .  c om*/
 * 
 * @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);
}

From source file:ExTexture.java

public Group buildScene() {
    // Get the current menu choices for appearance attributes
    int textureMode = ((Integer) modes[currentMode].value).intValue();
    Color3f color = (Color3f) colors[currentColor].value;
    Color3f blendColor = (Color3f) colors[currentBlendColor].value;

    // Turn on the example headlight
    setHeadlightEnable(true);//from w  w  w .j  a v  a2s . c o  m

    // Default to examine navigation
    setNavigationType(Examine);

    // Disable scene graph compilation for this example
    setCompilable(false);

    // Create the scene group
    Group scene = new Group();

    // BEGIN EXAMPLE TOPIC
    // Set up a basic material
    Material mat = new Material();
    mat.setAmbientColor(0.2f, 0.2f, 0.2f);
    mat.setDiffuseColor(1.0f, 1.0f, 1.0f);
    mat.setSpecularColor(0.0f, 0.0f, 0.0f);
    mat.setLightingEnable(true);

    // Set up the texturing attributes with an initial
    // texture mode, texture transform, and blend color
    texatt = new TextureAttributes();
    texatt.setPerspectiveCorrectionMode(TextureAttributes.NICEST);
    texatt.setTextureMode(textureMode);
    texatt.setTextureTransform(new Transform3D()); // Identity
    texatt.setTextureBlendColor(blendColor.x, blendColor.y, blendColor.z, 0.5f);

    // Enable changing these while the node component is live
    texatt.setCapability(TextureAttributes.ALLOW_MODE_WRITE);
    texatt.setCapability(TextureAttributes.ALLOW_BLEND_COLOR_WRITE);
    texatt.setCapability(TextureAttributes.ALLOW_TRANSFORM_WRITE);

    // Create an appearance using these attributes
    app = new Appearance();
    app.setMaterial(mat);
    app.setTextureAttributes(texatt);
    app.setTexture(tex);

    // And enable changing these while the node component is live
    app.setCapability(Appearance.ALLOW_TEXTURE_WRITE);
    app.setCapability(Appearance.ALLOW_TEXTURE_ATTRIBUTES_WRITE);

    // Build a shape and enable changing its appearance
    shape = new Shape3D(buildGeometry(), app);
    shape.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
    // END EXAMPLE TOPIC

    // Create some dummy appearance and tex attribute node components
    // In response to menu choices, we quickly switch the shape to
    // use one of these, then diddle with the main appearance or
    // tex attribute, then switch the shape back. This effectively
    // makes the appearance or tex attributes we want to change
    // become un-live during a change. We have to do this approach
    // because some texture features have no capability bits to set
    // to allow changes while live.
    dummyApp = new Appearance();
    dummyAtt = new TextureAttributes();

    scene.addChild(shape);

    return scene;
}

From source file:TickTockCollision.java

private Group createBox(double scale, Vector3d pos) {
    // Create a transform group node to scale and position the object.
    Transform3D t = new Transform3D();
    t.set(scale, pos);//from   ww  w.j  a  va2s . c  om
    TransformGroup objTrans = new TransformGroup(t);

    // Create a simple shape leaf node and add it to the scene graph
    Shape3D shape = new Box(0.5, 5.0, 1.0);
    objTrans.addChild(shape);

    // Create a new ColoringAttributes object for the shape's
    // appearance and make it writable at runtime.
    Appearance app = shape.getAppearance();
    ColoringAttributes ca = new ColoringAttributes();
    ca.setColor(0.6f, 0.3f, 0.0f);
    app.setCapability(app.ALLOW_COLORING_ATTRIBUTES_WRITE);
    app.setColoringAttributes(ca);

    // Create a new Behavior object that will perform the collision
    // detection on the specified object, and add it into
    // the scene graph.
    CollisionDetector cd = new CollisionDetector(shape);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
    cd.setSchedulingBounds(bounds);

    // Add the behavior to the scene graph
    objTrans.addChild(cd);

    return objTrans;
}

From source file:ExSwitch.java

public Group buildScene() {
    // Turn on the example headlight
    setHeadlightEnable(true);/*ww w  .  ja  v a2  s. com*/

    // Default to walk navigation
    setNavigationType(Walk);

    // Build the scene group
    Group scene = new Group();

    if (debug)
        System.err.println("  switch shapes...");

    // BEGIN EXAMPLE TOPIC
    // Build the switch group and allow its switch
    // value to be changed via menu items
    swtch = new Switch();
    swtch.setCapability(Switch.ALLOW_SWITCH_WRITE);

    //  Create several shapes to place in a switch group

    // Child 0: a red sphere
    Appearance app0 = new Appearance();
    Material mat0 = new Material();
    mat0.setAmbientColor(0.2f, 0.2f, 0.2f);
    mat0.setDiffuseColor(1.0f, 0.0f, 0.2f);
    mat0.setSpecularColor(0.7f, 0.7f, 0.7f);
    app0.setMaterial(mat0);

    Transform3D t3d = new Transform3D();
    t3d.setTranslation(new Vector3f(-2.0f, 1.5f, 0.0f));
    TransformGroup tg0 = new TransformGroup(t3d);
    Sphere sph0 = new Sphere(0.5f, // radius
            Primitive.GENERATE_NORMALS, // components
            16, // facets
            app0); // appearance
    tg0.addChild(sph0);
    swtch.addChild(tg0); // Child 0

    // Child 1: a green sphere
    Appearance app1 = new Appearance();
    Material mat1 = new Material();
    mat1.setAmbientColor(0.2f, 0.2f, 0.2f);
    mat1.setDiffuseColor(0.0f, 1.0f, 0.0f);
    mat1.setSpecularColor(0.7f, 0.7f, 0.7f);
    app1.setMaterial(mat1);
    t3d.setTranslation(new Vector3f(0.0f, 1.5f, 0.0f));
    TransformGroup tg1 = new TransformGroup(t3d);
    Sphere sph1 = new Sphere(0.5f, // radius
            Primitive.GENERATE_NORMALS, // components
            16, // facets
            app1); // appearance
    tg1.addChild(sph1);
    swtch.addChild(tg1); // Child 1

    // Child 2: a blue sphere
    Appearance app2 = new Appearance();
    Material mat2 = new Material();
    mat2.setAmbientColor(0.2f, 0.2f, 0.2f);
    mat2.setDiffuseColor(0.0f, 0.6f, 1.0f);
    mat2.setSpecularColor(0.7f, 0.7f, 0.7f);
    app2.setMaterial(mat2);
    t3d.setTranslation(new Vector3f(2.0f, 1.5f, 0.0f));
    TransformGroup tg2 = new TransformGroup(t3d);
    Sphere sph2 = new Sphere(0.5f, // radius
            Primitive.GENERATE_NORMALS, // components
            16, // facets
            app2); // appearance
    tg2.addChild(sph2);
    swtch.addChild(tg2);

    // Set the initial child choice
    swtch.setWhichChild(options[currentSwitch].child);
    scene.addChild(swtch);
    // END EXAMPLE TOPIC

    // Build foreground geometry including a floor and
    // columns on which the switchable shapes stand

    // Load textures
    TextureLoader texLoader = new TextureLoader("granite07rev.jpg", this);
    Texture columnTex = texLoader.getTexture();
    if (columnTex == null)
        System.err.println("Cannot load granite07rev.jpg texture");
    else {
        columnTex.setBoundaryModeS(Texture.WRAP);
        columnTex.setBoundaryModeT(Texture.WRAP);
        columnTex.setMinFilter(Texture.NICEST);
        columnTex.setMagFilter(Texture.NICEST);
        columnTex.setMipMapMode(Texture.BASE_LEVEL);
        columnTex.setEnable(true);
    }

    texLoader = new TextureLoader("flooring.jpg", this);
    Texture groundTex = texLoader.getTexture();
    if (groundTex == null)
        System.err.println("Cannot load flooring.jpg texture");
    else {
        groundTex.setBoundaryModeS(Texture.WRAP);
        groundTex.setBoundaryModeT(Texture.WRAP);
        groundTex.setMinFilter(Texture.NICEST);
        groundTex.setMagFilter(Texture.NICEST);
        groundTex.setMipMapMode(Texture.BASE_LEVEL);
        groundTex.setEnable(true);
    }

    //
    // Build several columns on the floor
    //
    if (debug)
        System.err.println("  columns...");
    SharedGroup column = new SharedGroup();
    Appearance columnApp = new Appearance();

    Material columnMat = new Material();
    columnMat.setAmbientColor(0.6f, 0.6f, 0.6f);
    columnMat.setDiffuseColor(1.0f, 1.0f, 1.0f);
    columnMat.setSpecularColor(0.0f, 0.0f, 0.0f);
    columnApp.setMaterial(columnMat);

    TextureAttributes columnTexAtt = new TextureAttributes();
    columnTexAtt.setTextureMode(TextureAttributes.MODULATE);
    columnTexAtt.setPerspectiveCorrectionMode(TextureAttributes.NICEST);
    columnApp.setTextureAttributes(columnTexAtt);

    if (columnTex != null)
        columnApp.setTexture(columnTex);

    GothicColumn columnShape = new GothicColumn(1.8f, // height
            0.25f, // radius
            GothicColumn.BUILD_TOP, // flags
            columnApp); // appearance
    column.addChild(columnShape);

    Vector3f trans = new Vector3f();
    Transform3D tr = new Transform3D();
    TransformGroup tg;

    // Left
    trans.set(-2.0f, -1.0f, 0.0f);
    tr.set(trans);
    tg = new TransformGroup(tr);
    tg.addChild(new Link(column));
    scene.addChild(tg);

    // Middle
    trans.set(0.0f, -1.0f, 0.0f);
    tr.set(trans);
    tg = new TransformGroup(tr);
    tg.addChild(new Link(column));
    scene.addChild(tg);

    // Right
    trans.set(2.0f, -1.0f, 0.0f);
    tr.set(trans);
    tg = new TransformGroup(tr);
    tg.addChild(new Link(column));
    scene.addChild(tg);

    //
    //  Add the ground
    //
    if (debug)
        System.err.println("  ground...");

    Appearance groundApp = new Appearance();

    Material groundMat = new Material();
    groundMat.setAmbientColor(0.6f, 0.6f, 0.6f);
    groundMat.setDiffuseColor(1.0f, 1.0f, 1.0f);
    groundMat.setSpecularColor(0.0f, 0.0f, 0.0f);
    groundApp.setMaterial(groundMat);

    tr = new Transform3D();
    tr.setScale(new Vector3d(4.0, 4.0, 1.0));

    TextureAttributes groundTexAtt = new TextureAttributes();
    groundTexAtt.setTextureMode(TextureAttributes.MODULATE);
    groundTexAtt.setPerspectiveCorrectionMode(TextureAttributes.NICEST);
    groundTexAtt.setTextureTransform(tr);
    groundApp.setTextureAttributes(groundTexAtt);

    if (groundTex != null)
        groundApp.setTexture(groundTex);

    ElevationGrid ground = new ElevationGrid(11, // X dimension
            11, // Z dimension
            2.0f, // X spacing
            2.0f, // Z spacing
            // Automatically use zero heights
            groundApp); // Appearance

    trans.set(0.0f, -1.0f, 0.0f);
    tr.set(trans);
    tg = new TransformGroup(tr);
    tg.addChild(ground);
    scene.addChild(tg);

    // Add a light
    BoundingSphere worldBounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), // Center
            1000.0); // Extent

    DirectionalLight light = new DirectionalLight();
    light.setEnable(true);
    light.setColor(new Color3f(1.0f, 1.0f, 1.0f));
    light.setDirection(new Vector3f(0.5f, -1.0f, -0.5f));
    light.setInfluencingBounds(worldBounds);
    scene.addChild(light);

    return scene;
}

From source file:CustomAlphaTest.java

protected BranchGroup createSceneBranchGroup() {
    BranchGroup objRoot = super.createSceneBranchGroup();

    TransformGroup objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

    ColorCube cube = new ColorCube(2);
    objTrans.addChild(cube);/*  w ww.jav a 2 s.c om*/

    FileAlpha fileAlpha = null;

    try {
        fileAlpha = new FileAlpha(new URL(getWorkingDirectory(), "values.xls"), this);
    } catch (Exception e) {
        e.toString();
    }

    PositionInterpolator posInterpolator = new PositionInterpolator(fileAlpha, objTrans, new Transform3D(), -6,
            6);
    posInterpolator.setSchedulingBounds(getApplicationBounds());

    objTrans.addChild(posInterpolator);
    objRoot.addChild(objTrans);

    return objRoot;
}

From source file:PolygonOffset.java

public BranchGroup createSceneGraph() {
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();

    // 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);
    objRoot.addChild(objTrans);//  w  ww  .  j  a  va  2 s  .c  o  m

    // Create a Sphere. We will display this as both wireframe and
    // solid to make a hidden line display
    // wireframe
    Appearance wireApp = new Appearance();

    ColoringAttributes wireCa = new ColoringAttributes();
    wireCa.setColor(black);
    wireApp.setColoringAttributes(wireCa);
    wirePa = new PolygonAttributes(PolygonAttributes.POLYGON_LINE, PolygonAttributes.CULL_BACK, 0.0f);
    wireApp.setPolygonAttributes(wirePa);
    Sphere outWireSphere = new Sphere(sphereRadius, 0, 15, wireApp);
    objTrans.addChild(outWireSphere);

    // solid
    ColoringAttributes outCa = new ColoringAttributes(red, ColoringAttributes.SHADE_FLAT);
    Appearance outSolid = new Appearance();
    outSolid.setColoringAttributes(outCa);
    solidPa = new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_BACK, 0.0f);
    solidPa.setPolygonOffsetFactor(dynamicOffset);
    solidPa.setPolygonOffset(staticOffset);
    solidPa.setCapability(PolygonAttributes.ALLOW_OFFSET_WRITE);
    outSolid.setPolygonAttributes(solidPa);
    Sphere outSolidSphere = new Sphere(sphereRadius, 0, 15, outSolid);
    objTrans.addChild(outSolidSphere);

    innerTG = new TransformGroup();
    innerTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    scale = new Transform3D();
    updateInnerScale();
    objTrans.addChild(innerTG);

    // Create a smaller sphere to go inside. This sphere has a different
    // tesselation and color
    Sphere inWireSphere = new Sphere(sphereRadius, 0, 10, wireApp);
    innerTG.addChild(inWireSphere);

    // inside solid
    ColoringAttributes inCa = new ColoringAttributes(blue, ColoringAttributes.SHADE_FLAT);
    Appearance inSolid = new Appearance();
    inSolid.setColoringAttributes(inCa);
    inSolid.setPolygonAttributes(solidPa);
    Sphere inSolidSphere = new Sphere(sphereRadius, 0, 10, inSolid);
    innerTG.addChild(inSolidSphere);

    // Create a new Behavior object that will perform the desired
    // operation on the specified transform object and add it into
    // the scene graph.
    AxisAngle4f axisAngle = new AxisAngle4f(0.0f, 0.0f, 1.0f, -(float) Math.PI / 2.0f);
    Transform3D yAxis = new Transform3D();
    Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 80000, 0, 0, 0, 0, 0);

    RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f,
            (float) Math.PI * 2.0f);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
    rotator.setSchedulingBounds(bounds);
    objTrans.addChild(rotator);

    // set up a white background
    Background bgWhite = new Background(new Color3f(1.0f, 1.0f, 1.0f));
    bgWhite.setApplicationBounds(bounds);
    objTrans.addChild(bgWhite);

    // Have Java 3D perform optimizations on this scene graph.
    objRoot.compile();

    return objRoot;
}

From source file:TreePrinter.java

private void printNode(Object o, int indent, Set sharedGroups) {
    for (int i = 0; i < indent; i++)
        printStream.print(">");
    printStream.print(nodeString(o) + ": ");
    if (o instanceof SceneGraphObject) {
        SceneGraphObject sgo = (SceneGraphObject) o;
        int capBits = 0;
        // TODO: how to make sure we always check all the valid bits?
        for (int i = 0; i < 64; i++) {
            if (sgo.getCapability(i)) {
                capBits |= 1 << i;
            }//from  ww  w  .jav  a  2s.  c om
        }
        printStream.print("capBits:Ox" + Integer.toHexString(capBits));
        if (o instanceof javax.media.j3d.Group) {
            javax.media.j3d.Group g = (javax.media.j3d.Group) o;
            int numChildren = 0;
            try {
                numChildren = g.numChildren();
            } catch (CapabilityNotSetException e) {
                //anyone who is using treePrinter, is debugging, so it is
                //alright to blindly allow read. you should first detach
                //browser.curScene, print the tree, then add it back to
                //browser.locale when finished.
                g.setCapability(javax.media.j3d.Group.ALLOW_CHILDREN_READ);
                numChildren = g.numChildren();
                //System.out.println("Can't read children on group");
                //return;
            }
            printStream.print(" children:" + numChildren);
            if (o instanceof TransformGroup) {
                Transform3D transform = new Transform3D();
                Transform3D identity = new Transform3D();
                TransformGroup t = (TransformGroup) o;
                t.getTransform(transform);
                // TODO: use getBestType() when implemented
                if (transform.equals(identity)) {
                    printStream.print(" xform:IDENTITY ");
                } else {
                    printStream.print(" xform:NON-IDENTITY ");
                }
            }
        } else if (o instanceof Link) {
            Link l = (Link) o;
            SharedGroup sg = l.getSharedGroup();
            printStream.print(" sg:" + nodeString(sg));
            sharedGroups.add(sg);
        } else {
            printStream.print(": leaf");
        }
    }
    printStream.println();
}

From source file:PickTest.java

public BranchGroup createSceneGraph(Canvas3D canvas) {
    // 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(1.0);/*from w w  w  . jav  a  2 s  . c  om*/
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);

    // Create a bunch of objects with a behavior and add them
    // into the scene graph.

    int row, col;
    int numRows = 4, numCols = 4;

    for (int i = 0; i < numRows; i++) {
        double ypos = (double) (i - numRows / 2) * 0.45 + 0.25;
        for (int j = 0; j < numCols; j++) {
            double xpos = (double) (j - numCols / 2) * 0.45 + 0.25;
            objScale.addChild(createObject(i * numCols + j, 0.1, xpos, ypos));
        }
    }

    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);

    // Add a light.
    Color3f lColor = new Color3f(1.0f, 1.0f, 1.0f);
    Vector3f lDir = new Vector3f(0.0f, 0.0f, -1.0f);

    DirectionalLight lgt = new DirectionalLight(lColor, lDir);
    lgt.setInfluencingBounds(bounds);
    objRoot.addChild(lgt);

    // Now create the Alpha object that controls the speed of the
    // morphing operation.
    Alpha morphAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE | Alpha.DECREASING_ENABLE, 0, 0, 4000, 1000, 500,
            4000, 1000, 500);

    // Finally, create the morphing behavior
    MorphingBehavior mBeh = new MorphingBehavior(morphAlpha, morph);
    mBeh.setSchedulingBounds(bounds);
    objRoot.addChild(mBeh);

    behavior1 = new PickRotateBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior1);

    behavior2 = new PickZoomBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior2);

    behavior3 = new PickTranslateBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior3);

    // Let Java 3D perform optimizations on this scene graph.
    objRoot.compile();

    return objRoot;
}