Examples of javax.media.j3d.BranchGroup

javax.media.j3d.BranchGroup
The BranchGroup serves as a pointer to the root of a scene graph branch; BranchGroup objects are the only objects that can be inserted into a Locale's set of objects. A subgraph, rooted by a BranchGroup node can be thought of as a compile unit. The following things may be done with BranchGroup:
- A BranchGroup may be compiled by calling its compile method. This causes the entire subgraph to be compiled. If any BranchGroup nodes are contained within the subgraph, they are compiled as well (along with their descendants).
- A BranchGroup may be inserted into a virtual universe by attaching it to a Locale. The entire subgraph is then said to be live.
- A BranchGroup that is contained within another subgraph may be reparented or detached at run time if the appropriate capabilities are set.
Note that that if a BranchGroup is included in another subgraph, as a child of some other group node, it may not be attached to a Locale.

  //the SimpleUniverse.
  public void createSceneGraph(SimpleUniverse su)
  {


    // Create the root of the branch group for the scene.
    BranchGroup theScene = new BranchGroup();




    //Generate an Appearance for the sphere.
    Color3f ambientColourSphere = new Color3f(0.2f,0.2f,0.2f);
    Color3f emissiveColourSphere = new Color3f(0.0f,0.0f,0.0f);
    Color3f diffuseColourSphere = new Color3f(0.6f,0.6f,0.6f);
    Color3f specularColourSphere = new Color3f(0.5f,0.5f,0.5f);


    float shininessSphere = 20.0f;


    Appearance sphereApp = new Appearance();


    sphereApp.setMaterial(new Material(ambientColourSphere,emissiveColourSphere,
                           diffuseColourSphere,specularColourSphere,shininessSphere));




    //n spheres with radius r will be shown.
    int n = 5;
    float r = 0.15f;
    float shift = 2*r+0.05f;//The distance between the centres of the spheres.




    //Arrays for the sphere, their transformations and their transformation groups
    //transformation groups (for positioning).
    Sphere[] spheres = new Sphere[n];
    TransformGroup[] tg = new TransformGroup[n];
    Transform3D[] tf = new Transform3D[n];


    //Generate the sphere, their transformations and their
    //transformation groups. Add everyting to the scene.
    for (int i=0; i<n; i++)
    {
      spheres[i] = new Sphere(r,Sphere.GENERATE_NORMALS,4+i*i*i,sphereApp);
      tf[i] = new Transform3D();
      tf[i].setTranslation(new Vector3f(-0.95f+r+shift*i,0.0f,0.0f));
      tg[i] = new TransformGroup(tf[i]);
      tg[i].addChild(spheres[i]);
      theScene.addChild(tg[i]);
    }




    //Generate a white background.
    Background bg = new Background(new Color3f(1.0f,1.0f,1.0f));
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),1000.0);
    bg.setApplicationBounds(bounds);
    theScene.addChild(bg);






    theScene.compile();


    //Add the scene to the universe.
    su.addBranchGraph(theScene);


  }

View Full Code Here


  //Some light is added to the scene here.
  public void addLight(SimpleUniverse su)
  {


    BranchGroup bgLight = new BranchGroup();


    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), Double.MAX_VALUE);




    //Directional light.
    Color3f lightColour = new Color3f(1.0f, 1.0f, 1.0f);
    Vector3f lightDir  = new Vector3f(1.0f, -1.0f, -1.0f);
    DirectionalLight light = new DirectionalLight(lightColour, lightDir);
    light.setInfluencingBounds(bounds);
    bgLight.addChild(light);






    //Ambient light.
    Color3f ambientLightColour = new Color3f(0.5f, 0.5f, 0.5f);
    AmbientLight ambLight = new AmbientLight(ambientLightColour);
    ambLight.setInfluencingBounds(bounds);
    bgLight.addChild(ambLight);




    su.addBranchGraph(bgLight);
  }

View Full Code Here

  //the SimpleUniverse.
  public void createSceneGraph(SimpleUniverse su)
  {


//*** The root of the graph containing the scene (with a cube and a sphere). ***
    BranchGroup theScene = new BranchGroup();




    //Generate an Appearance.
    Color3f ambientColourShaded = new Color3f(0.0f,0.4f,0.4f);
    Color3f emissiveColourShaded = new Color3f(0.0f,0.0f,0.0f);
    Color3f diffuseColourShaded = new Color3f(0.0f,0.7f,0.7f);
    Color3f specularColourShaded = new Color3f(0.0f,0.5f,0.5f);


    float shininessShaded = 20.0f;


    Appearance shadedApp = new Appearance();
    shadedApp.setMaterial(new Material(ambientColourShaded,emissiveColourShaded,
                           diffuseColourShaded,specularColourShaded,shininessShaded));












    float r = 0.3f; //The radius of the sphere.
    float boxHL = 0.7f*r; //Half the vertex length of the cube.
    float shift = 3.0f*r; //Distance between cube and sphere.




//*** The sphere and its transformation group ***
    Sphere s = new Sphere(r,Sphere.GENERATE_NORMALS,100,shadedApp);
    Transform3D tfSphere = new Transform3D();
    tfSphere.setTranslation(new Vector3f(-0.95f+r,0.0f,0.0f));
    TransformGroup tgSphere = new TransformGroup(tfSphere);
    tgSphere.addChild(s);
    theScene.addChild(tgSphere);








//*** The cube and its transformation group ***
    Box b2 = new Box(boxHL,boxHL,boxHL,shadedApp);
    Transform3D tfBox2 = new Transform3D();
    tfBox2.setTranslation(new Vector3f(-0.95f+r+shift,0.0f,0.0f));
    Transform3D rotation = new Transform3D();
    rotation.rotY(Math.PI/4);
    Transform3D rotationX = new Transform3D();
    rotationX.rotX(Math.PI/6);
    rotation.mul(rotationX);
    tfBox2.mul(rotation);
    TransformGroup tgBox2 = new TransformGroup(tfBox2);
    tgBox2.addChild(b2);
    theScene.addChild(tgBox2);








    //Generate a white background.
    Background bg = new Background(new Color3f(1.0f,1.0f,1.0f));
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),Double.MAX_VALUE);
    bg.setApplicationBounds(bounds);
    theScene.addChild(bg);






    theScene.compile();


    //Add the scene to the universe.
    su.addBranchGraph(theScene);


  }

View Full Code Here


  //Directional light rotating around the scene and some ambient light.
  public void addLight(SimpleUniverse su)
  {


    BranchGroup bgLight = new BranchGroup();


    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), Double.MAX_VALUE);




    //Directional light (to be rotated).
    Color3f lightColour = new Color3f(1.0f, 1.0f, 1.0f);
    Vector3f lightDir  = new Vector3f(0.0f, 0.0f, -1.0f);
    DirectionalLight light = new DirectionalLight(lightColour, lightDir);
    light.setInfluencingBounds(bounds);


    //The transformation group for the directional light and its rotation.
    TransformGroup tfmLight = new TransformGroup();
    tfmLight.addChild(light);


    //The Alpha for the rotation.
    Alpha alphaLight = new Alpha(-1,4000);
    //The rotation
    RotationInterpolator rot = new RotationInterpolator(alphaLight,tfmLight,
                                                        new Transform3D(),
                                                         0.0f,(float) Math.PI*2);
    rot.setSchedulingBounds(bounds);


    tfmLight.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    tfmLight.addChild(rot);


    bgLight.addChild(tfmLight);








    //Ambient light.
    Color3f ambientLightColour = new Color3f(0.5f, 0.5f, 0.5f);
    AmbientLight ambLight = new AmbientLight(ambientLightColour);
    ambLight.setInfluencingBounds(bounds);
    bgLight.addChild(ambLight);




    su.addBranchGraph(bgLight);
  }

View Full Code Here








//*** The root of the graph containing the scene. ***
    BranchGroup theScene = new BranchGroup();




    //Add the helicopter and the tree to the scene.
    theScene.addChild(tgHeliPlat);
    theScene.addChild(tgTree);






    theScene.compile();


    //Add the scene to the universe.
    su.addBranchGraph(theScene);


  }

View Full Code Here


  //Some light is added to the scene here.
  public void addLight(SimpleUniverse su)
  {


    BranchGroup bgLight = new BranchGroup();


    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
    Color3f lightColour1 = new Color3f(1.0f,1.0f,1.0f);
    Vector3f lightDir1  = new Vector3f(-1.0f,0.0f,-0.5f);
    DirectionalLight light1 = new DirectionalLight(lightColour1, lightDir1);
    light1.setInfluencingBounds(bounds);


    bgLight.addChild(light1);
    su.addBranchGraph(bgLight);
  }

View Full Code Here

  //the SimpleUniverse.
  public void createSceneGraph(SimpleUniverse su)
  {


    //Create the root of the branch graph
    BranchGroup theScene = new BranchGroup();




    //Generate an Appearance for the spheres.
    Color3f ambientColourSphere = new Color3f(0.2f,0.2f,0.2f);
    Color3f emissiveColourSphere = new Color3f(0.0f,0.0f,0.0f);
    Color3f diffuseColourSphere = new Color3f(0.6f,0.6f,0.6f);
    Color3f specularColourSphere = new Color3f(0.5f,0.5f,0.5f);


    float shininessSphere = 20.0f;


    Appearance sphereApp = new Appearance();


    sphereApp.setMaterial(new Material(ambientColourSphere,emissiveColourSphere,
                           diffuseColourSphere,specularColourSphere,shininessSphere));


    ColoringAttributes ca = new ColoringAttributes();
    ca.setShadeModel(ColoringAttributes.SHADE_FLAT);
    sphereApp.setColoringAttributes(ca);




    //n spheres with radius r will be shown.
    int n = 5;
    float r = 0.15f;
    float shift = 2*r+0.05f;//The distance between the centres of the spheres.


    //Arrays for the sphere, their transformations and their transformation groups
    //transformation groups (for positioning).
    Sphere[] spheres = new Sphere[n];
    TransformGroup[] tg = new TransformGroup[n];
    Transform3D[] tf = new Transform3D[n];


    //Generate the sphere, their transformations and their
    //transformation groups. Add everyting to the scene.
    for (int i=0; i<n; i++)
    {
      spheres[i] = new Sphere(r,Sphere.GENERATE_NORMALS,4+i*i*i,sphereApp);
      tf[i] = new Transform3D();
      tf[i].setTranslation(new Vector3f(-0.95f+r+shift*i,0.0f,0.0f));
      tg[i] = new TransformGroup(tf[i]);
      tg[i].addChild(spheres[i]);
      theScene.addChild(tg[i]);
    }




    //Generate a white background.
    Background bg = new Background(new Color3f(1.0f,1.0f,1.0f));
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),1000.0);
    bg.setApplicationBounds(bounds);
    theScene.addChild(bg);






    theScene.compile();


    //Add the scene to the universe
    su.addBranchGraph(theScene);


  }

View Full Code Here


  //Some light is added to the scene here.
  public void addLight(SimpleUniverse su)
  {


    BranchGroup bgLight = new BranchGroup();


    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), Double.MAX_VALUE);




    //Directional light.
    Color3f lightColour = new Color3f(1.0f, 1.0f, 1.0f);
    Vector3f lightDir  = new Vector3f(1.0f, -1.0f, -1.0f);
    DirectionalLight light = new DirectionalLight(lightColour, lightDir);
    light.setInfluencingBounds(bounds);
    bgLight.addChild(light);






    //Ambient light.
    Color3f ambientLightColour = new Color3f(0.5f, 0.5f, 0.5f);
    AmbientLight ambLight = new AmbientLight(ambientLightColour);
    ambLight.setInfluencingBounds(bounds);
    bgLight.addChild(ambLight);




    su.addBranchGraph(bgLight);
  }

View Full Code Here

        }


        Enumeration branches = _simpleUniverse.getLocale().getAllBranchGraphs();


        while (branches.hasMoreElements()) {
            BranchGroup branchGroup = (BranchGroup) branches.nextElement();


            if (branchGroup.getCapability(BranchGroup.ALLOW_DETACH)) {
                if (!(branchGroup instanceof com.sun.j3d.utils.universe.ViewingPlatform)) {
                    _simpleUniverse.getLocale().removeBranchGraph(branchGroup);
                }
            }
        }


        _branchRoot = new BranchGroup();
        _branchRoot.setCapability(BranchGroup.ALLOW_DETACH);


        _userTransformation = new TransformGroup(_lastTransform);
        _userTransformation.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        _userTransformation.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
        _userTransformation.setCapability(Group.ALLOW_CHILDREN_EXTEND);
        _branchRoot.addChild(_userTransformation);


        //To allow multiple shapes to be added
        /*        _root = new BranchGroup();
         _root.setCapability(BranchGroup.ALLOW_DETACH);
         _root.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
         _root.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
         _root.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
         _userTransformation.addChild(_root); */
        _bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);


        Background backg = _makeBackground();
        backg.setApplicationBounds(_bounds);
        _branchRoot.addChild(backg);


        if (_isRotatable()) {
            _mouseRotate = new MouseRotateView(this);
            _mouseRotate.setTransformGroup(_userTransformation);
            _mouseRotate.setSchedulingBounds(_bounds);
            _branchRoot.addChild(_mouseRotate);
        }


        if (_isScalable()) {
            MouseZoom mouseZoom = new MouseZoom();
            mouseZoom.setTransformGroup(_userTransformation);
            mouseZoom.setSchedulingBounds(_bounds);
            _branchRoot.addChild(mouseZoom);
        }


        if (_isTranslatable()) {
            MouseTranslate mouseTranslate = new MouseTranslate();
            mouseTranslate.setTransformGroup(_userTransformation);
            _userTransformation.addChild(mouseTranslate);
            mouseTranslate.setSchedulingBounds(_bounds);
        }


        // FIXME: should implement this so that user can dynamically
        // modify this value during design-time and run-time
        // right now this is only user-changeable during initialization
        if (_isIterationSynchronized()) {
            _iterationSynchronized = true;
        } else {
            _iterationSynchronized = false;
        }


        if (_shouldShowAxes()) {
            Sphere origin = new Sphere((float) 0.05);
            _userTransformation.addChild(origin);


            Cylinder yAxis = new Cylinder((float) 0.01, (float) 6.0);
            _userTransformation.addChild(yAxis);


            Cylinder xAxis = new Cylinder((float) 0.01, (float) 6.0);
            Transform3D rotation = new Transform3D();
            Quat4d quat = new Quat4d();
            quat.set(new AxisAngle4d(0.0, 0.0, 1.0, Math.PI / 2.0));
            rotation.set(quat);


            TransformGroup xAxisGroup = new TransformGroup(rotation);
            xAxisGroup.addChild(xAxis);
            _userTransformation.addChild(xAxisGroup);


            Cylinder zAxis = new Cylinder((float) 0.01, (float) 6.0);
            Transform3D rotation2 = new Transform3D();
            Quat4d quat2 = new Quat4d();
            quat2.set(new AxisAngle4d(1.0, 0.0, 0.0, Math.PI / 2.0));
            rotation2.set(quat2);


            TransformGroup zAxisGroup = new TransformGroup(rotation2);
            zAxisGroup.addChild(zAxis);
            _userTransformation.addChild(zAxisGroup);
        }


        // Setup the lights.
        BranchGroup lightRoot = new BranchGroup();


        AmbientLight lightAmbient = new AmbientLight(new Color3f(0.8f, 0.8f,
                0.8f));
        lightAmbient.setInfluencingBounds(_bounds);
        lightRoot.addChild(lightAmbient);


        DirectionalLight lightDirectional = new DirectionalLight();
        lightDirectional.setInfluencingBounds(_bounds);


        Vector3f direction = new Vector3f(0.0f, -1.0f, -1.0f);
        direction.normalize();
        lightDirectional.setDirection(direction);
        lightDirectional.setColor(new Color3f(1.0f, 1.0f, 1.0f));
        lightRoot.addChild(lightDirectional);


        _simpleUniverse.getViewer().getView().setLocalEyeLightingEnable(true);
        _simpleUniverse.addBranchGraph(lightRoot);


        if (_iterationSynchronized) {

View Full Code Here

    /** Set up this actor to listen to mouse motion events.
     *  @exception IllegalActionException If thrown by the parent class.
     */
    public void initialize() throws IllegalActionException {
        super.initialize();
        _containedNode = new BranchGroup();
        _react = new React();
        _react.setSchedulingBounds(new BoundingSphere());
        _containedNode.addChild(_react);
        _hasData = false;
    }

View Full Code Here

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