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.

    /**
     * Sets the 3D model viewed by this model  
     */
    public void setModel(Content model, final UserPreferences preferences) {
      if (model == null) {
        setModel(new BranchGroup());            
      } else {
        ModelManager.getInstance().loadModel(model, new ModelManager.ModelObserver() {          
            public void modelUpdated(BranchGroup modelRoot) {
              setModel(modelRoot);            
            }

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    /*
     * 
     */
  protected float getSceneSize() {
    BranchGroup bg = scene.getBranchgroup();
    boolean autocompute = bg.getBoundsAutoCompute();
    scene.getBranchgroup().setBoundsAutoCompute(true);
    Bounds bounds = scene.getBranchgroup().getBounds();
    scene.getBranchgroup().setBoundsAutoCompute(autocompute);
    if (bounds instanceof BoundingSphere) {
      return (float)((BoundingSphere)bounds).getRadius();

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        canvas3D = new Canvas3D(r);
        
        canvas3D.setDoubleBufferEnable(true);
        universe = new SimpleUniverse(canvas3D);


        rootGroup = new BranchGroup();
        rootGroup.setCapability(BranchGroup.ALLOW_DETACH);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
        branchgroup = new BranchGroup();
        branchgroup.setCapability(BranchGroup.ALLOW_AUTO_COMPUTE_BOUNDS_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_AUTO_COMPUTE_BOUNDS_WRITE);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
        
        // TODO use light factories


        AmbientLight alight = new AmbientLight(true,new Color3f(0.5f,0.5f,0.5f));
        alight.setEnable(true);
        rootGroup.addChild(alight);
        BoundingSphere bounds = new BoundingSphere (new Point3d (0, 0.0, 0), 1E100);
        alight.setInfluencingBounds(bounds);


        lights = new DirectionalLight[1];


        for (int i=0; i<lights.length; ++i) {
          // TODO : position lights around the object
            lights[i] = new DirectionalLight(true,new Color3f(1.0f,1.0f,1.0f),new Vector3f(-1,-1,-1));
            lights[i].setCapability(DirectionalLight.ALLOW_DIRECTION_READ);
            lights[i].setCapability(DirectionalLight.ALLOW_DIRECTION_WRITE);
            lights[i].setCapabilityIsFrequent(DirectionalLight.ALLOW_DIRECTION_READ);
            lights[i].setCapabilityIsFrequent(DirectionalLight.ALLOW_DIRECTION_WRITE);
            lights[i].setEnable(true);
            lights[i].setInfluencingBounds(bounds);
            rootGroup.addChild(lights[i]);
        }
        
        // X axis in blue
        axisGroup = new BranchGroup();


        float[] axis = AxisMaker.makeAxis(0);
        LineArray la = new LineArray(axis.length/3, LineArray.COORDINATES);
        la.setCoordinates(0,axis);
        Appearance a = new Appearance();

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        canvas3D = new Canvas3D(r);
        
        canvas3D.setDoubleBufferEnable(true);
        universe = new SimpleUniverse(canvas3D);


        rootGroup = new BranchGroup();
        rootGroup.setCapability(BranchGroup.ALLOW_DETACH);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
        rootGroup.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
        branchgroup = new BranchGroup();
        branchgroup.setCapability(BranchGroup.ALLOW_AUTO_COMPUTE_BOUNDS_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_AUTO_COMPUTE_BOUNDS_WRITE);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
        branchgroup.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
        
        // TODO use light factories


        AmbientLight alight = new AmbientLight(true,new Color3f(0.5f,0.5f,0.5f));
        alight.setEnable(true);
        rootGroup.addChild(alight);
        BoundingSphere bounds = new BoundingSphere (new Point3d (0, 0.0, 0), 1E100);
        alight.setInfluencingBounds(bounds);


        lights = new DirectionalLight[1];


        for (int i=0; i<lights.length; ++i) {
          // TODO : position lights around the object
            lights[i] = new DirectionalLight(true,new Color3f(1.0f,1.0f,1.0f),new Vector3f(-1,-1,-1));
            lights[i].setCapability(DirectionalLight.ALLOW_DIRECTION_READ);
            lights[i].setCapability(DirectionalLight.ALLOW_DIRECTION_WRITE);
            lights[i].setCapabilityIsFrequent(DirectionalLight.ALLOW_DIRECTION_READ);
            lights[i].setCapabilityIsFrequent(DirectionalLight.ALLOW_DIRECTION_WRITE);
            lights[i].setEnable(true);
            lights[i].setInfluencingBounds(bounds);
            rootGroup.addChild(lights[i]);
        }
        
        // X axis in blue
        axisGroup = new BranchGroup();


        float[] axis = AxisMaker.makeAxis(0);
        LineArray la = new LineArray(axis.length/3, LineArray.COORDINATES);
        la.setCoordinates(0,axis);
        Appearance a = new Appearance();

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    protected transient BranchGroup branchgroup;
    
    public BranchGroupNodeJava3D(ActiveNode parent) {
        super(parent);
        branchgroup = new BranchGroup();
        branchgroup.setUserData(this);
        branchgroup.setPickable(true);
        SceneNodeJava3D.addChildToParentGroup((Group)getParent().get3DObject(), branchgroup);
    }

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    }
    
    
    private void readObject(java.io.ObjectInputStream in) throws java.lang.ClassNotFoundException, java.io.IOException {
    in.defaultReadObject();
    branchgroup = new BranchGroup();
      branchgroup.setUserData(this);
      branchgroup.setPickable(true);
  }

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        return _global;
    }


    private static BranchGroup createSimpleSceneGraph() {
        // Create the root of the branch graph
        BranchGroup objRoot = new BranchGroup();
        // Create the TransformGroup node and initialize it to the
        // identity. Enable the TRANSFORM_WRITE capability so that
        // our behavior code can modify it at run time. Add it to
        // the root of the subgraph.
        TransformGroup objTrans = new TransformGroup();
        Transform3D t3dTrans = new Transform3D();
        objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objTrans.setTransform(t3dTrans);
        objRoot.addChild(objTrans);
        BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
                100.0);
        // Set up the ambient light
        Color3f ambientColor = new Color3f(0.3f, 0.3f, 0.3f);
        AmbientLight ambientLightNode = new AmbientLight(ambientColor);
        ambientLightNode.setInfluencingBounds(bounds);
        objRoot.addChild(ambientLightNode);
        // Set up one directional lights
        Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
        Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f);
        DirectionalLight light1 = new DirectionalLight(light1Color,
                light1Direction);
        light1.setInfluencingBounds(bounds);
        objRoot.addChild(light1);
        return objRoot;
    }

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    BranchGroup getRootGroup() {
        Node n = _n;
        while (n != null) {
            if (n instanceof BranchGroup) {
                BranchGroup bg = (BranchGroup) n;
                if (bg.getParent() == null) {
                    return bg;
                }
            }
            n = n.getParent();
        }

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     */
    protected float getSceneSize() {
        Bounds res=null;
        Enumeration<?> e=_viewingPlatform.getLocale().getAllBranchGraphs();
        while(e.hasMoreElements()){
            BranchGroup bg=(BranchGroup)e.nextElement();
            Bounds b=bg.getBounds();
            if(res==null){
                res=b;
            }
            else{
                res.combine(b);

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        public AddBranchGroupActionUniverse() {
        }


        public void actionPerformed(ActionEvent e) {
            ((Universe) getNode().getGraphObject())
                    .addBranchGraph(new BranchGroup());
            // TODO add undo
            getNode().refresh();
        }

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