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.


  //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);
    Color3f lightColour1 = new Color3f(1.0f,1.0f,1.0f);
    Vector3f lightDir1  = new Vector3f(0.2f,-0.1f,-1.0f);
    DirectionalLight light1 = new DirectionalLight(lightColour1, lightDir1);
    light1.setInfluencingBounds(bounds);


    bgLight.addChild(light1);




    su.addBranchGraph(bgLight);


  }

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      view.setFieldOfView(0.6*Math.PI);


  }
  
  private void createSceneGraph() {
      parent = new BranchGroup();
      
      ciel = new Background(new Color3f(0.9f, 0.9f, 1.0f));
      ciel.setCapability(Background.ALLOW_COLOR_WRITE);
      ciel.setApplicationBounds(new BoundingSphere(new Point3d(0, 0, 0), 80));
      parent.addChild(ciel);

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      mouvement.mul(rotation);
      simpleU.getViewingPlatform().getViewPlatformTransform().setTransform(mouvement);
  }
  
  public void dessinerLigne(List<Point> ligne){
    BranchGroup bg = new BranchGroup();
    int stripVertexCounts[] = {ligne.size()};
    LineStripArray ligneArray = new LineStripArray(ligne.size(), LineArray.COORDINATES | LineArray.COLOR_3, stripVertexCounts);
    for (int i=0; i<ligne.size(); i++){
      ligneArray.setCoordinate(i, new Point3d(ligne.get(i).y, ligne.get(i).z + 0.2, ligne.get(i).x));
      ligneArray.setColor(i, new Color3f(Color.blue));
    }
    bg.addChild(new Shape3D(ligneArray));
    simpleU.addBranchGraph(bg);
  }

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    bg.addChild(new Shape3D(ligneArray));
    simpleU.addBranchGraph(bg);
  }
  
  public void dessinerSurface(List<Point> frontiere){
    BranchGroup bg = new BranchGroup();
    Shape3D surface = new Shape3D();
    
    float[] coords = new float[(frontiere.size()+1)*3];
        int i = 0;
        for (Point p : frontiere){
          coords[i++]= (float)p.y;
          coords[i++]= (float)p.z;
          coords[i++]= (float)p.x;
        }
        Point p = frontiere.get(0);
        coords[i++]= (float)p.y;
      coords[i++]= (float)p.z;
      coords[i++]= (float)p.x;
    
        int[] stripCount = {frontiere.size()+1};  // ******
        
        GeometryInfo gi = new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
        gi.setCoordinates(coords);
        gi.setStripCounts(stripCount);
        gi.recomputeIndices();
        


        NormalGenerator ng = new NormalGenerator();
        ng.generateNormals(gi);
        gi.recomputeIndices();


        Stripifier st = new Stripifier();
        st.stripify(gi);
        gi.recomputeIndices();


        surface.setAppearance(CreateurVoiture.createMaterialAppearance());
        surface.setGeometry(gi.getGeometryArray());
    
    bg.addChild(surface);
    simpleU.addBranchGraph(bg);
    //System.out.println(frontiere.size() +" pts traces");
  }

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    simpleU.addBranchGraph(bg);
    //System.out.println(frontiere.size() +" pts traces");
  }
  
  public void creerVoiture1(float x, float y, float z){
    BranchGroup voiture1 = new BranchGroup();
    voiture1tg = new TransformGroup();
    voiture1tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D translation;
      translation = new Transform3D();
      translation.setTranslation(new Vector3f (0, 0, 0));
      voiture1tg.setTransform(translation);
      /*ColoringAttributes ca = new ColoringAttributes();
      ca.setColor(0.8f, 0.8f, 0.2f);
      Appearance boxAppear = new Appearance();
      boxAppear.setColoringAttributes(ca);
      Box box = new Box(x/2, y, z, boxAppear);
      //Box box = new Box();
      voiture1tg.addChild(box);
      voiture1.addChild(voiture1tg);
      voiture1.compile();
      simpleU.addBranchGraph(voiture1);*/
      
      DirectionalLight light2 = new DirectionalLight();
      light2.setDirection(new Vector3f(0.1f, -0.5f, 0.1f));
      //light.setColor(new Color3f(0.5f, 0.5f, 0.5f));
      light2.setInfluencingBounds(new BoundingSphere(new Point3d(0, 0, 0), 80));
      voiture1.addChild(light2);
      
      voiture1tg.addChild(CreateurVoiturePeugeot.creerForme(true));
      voiture1.addChild(voiture1tg);
      voiture1.compile();
      simpleU.addBranchGraph(voiture1);
  }

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      voiture1.compile();
      simpleU.addBranchGraph(voiture1);
  }
  
  public void creerVoiture2(float x, float y, float z){
    BranchGroup voiture2 = new BranchGroup();
    voiture2tg = new TransformGroup();
    voiture2tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D translation;
      translation = new Transform3D();
      translation.setTranslation(new Vector3f (0, 0, 0));
      voiture2tg.setTransform(translation);
      /*ColoringAttributes ca = new ColoringAttributes();
      ca.setColor(0.2f, 0.2f, 0.9f);
      Appearance boxAppear = new Appearance();
      boxAppear.setColoringAttributes(ca);*/
      //Box box = new Box(x, y, z, boxAppear);
      //Box box = new Box();
      
      DirectionalLight light2 = new DirectionalLight();
      light2.setDirection(new Vector3f(0.1f, -0.5f, 0.1f));
      //light.setColor(new Color3f(0.5f, 0.5f, 0.5f));
      light2.setInfluencingBounds(new BoundingSphere(new Point3d(0, 0, 0), 80));
      voiture2.addChild(light2);
      
      voiture2tg.addChild(CreateurVoiturePeugeot.creerForme(false));
      voiture2.addChild(voiture2tg);
      voiture2.compile();
      simpleU.addBranchGraph(voiture2);
  }

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    TransformGroup tgTetrahedron = new TransformGroup(tfTetrahedron);
    tgTetrahedron.addChild(tetrahedron);




//*** The root of the scenegraph. ***
    BranchGroup theScene = new BranchGroup();


    //Add the tetrahedron to the scene.
    theScene.addChild(tgTetrahedron);


    theScene.compile();


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


  }

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  //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);
    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);




    Vector3f lightDir2  = new Vector3f(1.0f,0.0f,0.5f);
    DirectionalLight light2 = new DirectionalLight(lightColour1, lightDir2);
    light2.setInfluencingBounds(bounds);




    bgLight.addChild(light1);
    bgLight.addChild(light2);


    su.addBranchGraph(bgLight);
  }

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    tfBSphere.setTranslation(new Vector3f(2.0f,0.0f,-10.5f));
    TransformGroup tgBSphere = new TransformGroup(tfBSphere);
    tgBSphere.addChild(tgmBSphere);


    //Generate the scenegraph.
    BranchGroup theScene = new BranchGroup();
    theScene.addChild(tgFBox);
    theScene.addChild(tgBSphere);




    //Definition of the parameters for picking. Generate the PickingBehaviour
    //and add it to the scene.
    Alpha[] alphas = new Alpha[3];


    alphas[0] = boxAlpha;
    alphas[1] = sphereShrinkAlpha;
    alphas[2] = sphereStretchAlpha;


    PickingExample pe = new PickingExample(myCanvas3D,theScene,bounds,alphas);


    theScene.addChild(pe);




    theScene.compile();


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


  }

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  //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 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);




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




    su.addBranchGraph(bgLight);


  }

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