Examples of javax.media.j3d.TransformGroup

javax.media.j3d.TransformGroup
Group node that contains a transform. The TransformGroup node specifies a single spatial transformation, via a Transform3D object, that can position, orient, and scale all of its children.
The specified transformation must be affine. Further, if the TransformGroup node is used as an ancestor of a ViewPlatform node in the scene graph, the transformation must be congruent-only rotations, translations, and uniform scales are allowed in a direct path from a Locale to a ViewPlatform node.
Note: Even though arbitrary affine transformations are allowed, better performance will result if all matrices within a branch graph are congruent, containing only rotations translation, and uniform scale.
The effects of transformations in the scene graph are cumulative. The concatenation of the transformations of each TransformGroup in a direct path from the Locale to a Leaf node defines a composite model transformation (CMT) that takes points in that Leaf node's local coordinates and transforms them into Virtual World (Vworld) coordinates. This composite transformation is used to transform points, normals, and distances into Vworld coordinates. Points are transformed by the CMT. Normals are transformed by the inverse-transpose of the CMT. Distances are transformed by the scale of the CMT. In the case of a transformation containing a nonuniform scale or shear, the maximum scale value in any direction is used. This ensures, for example, that a transformed bounding sphere, which is specified as a point and a radius, continues to enclose all objects that are also transformed using a nonuniform scale.

    /**
     * Multiplies the transform at top of the transform groups stack by the 
     * given <code>transformMultiplier</code>.
     */
    private void mulTransformGroup(Transform3D transformMultiplier) {
      TransformGroup transformGroup = (TransformGroup)this.parentGroups.peek();
      Transform3D transform = new Transform3D();
      transformGroup.getTransform(transform);
      transform.mul(transformMultiplier);
      transformGroup.setTransform(transform);
    }

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          modelRotation [2][0], modelRotation [2][1], modelRotation [2][2]);
      modelTransform.setRotation(modelRotationMatrix);
    }
    modelTransform.mul(scaleOneTransform);
    
    return new TransformGroup(modelTransform);
  }

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   * Creates the piece node with its transform group and add it to the piece branch. 
   */
  private void createPieceOfFurnitureNode(final HomePieceOfFurniture piece, 
                                          final boolean ignoreDrawingMode, 
                                          final boolean waitModelAndTextureLoadingEnd) {
    final TransformGroup pieceTransformGroup = new TransformGroup();
    // Allow the change of the transformation that sets piece size and position
    pieceTransformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    pieceTransformGroup.setCapability(Group.ALLOW_CHILDREN_READ);
    pieceTransformGroup.setCapability(Group.ALLOW_CHILDREN_WRITE);
    pieceTransformGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
    addChild(pieceTransformGroup);
    
    // While loading model use a temporary node that displays a white box  
    final BranchGroup waitBranch = new BranchGroup();
    waitBranch.setCapability(BranchGroup.ALLOW_DETACH);
    waitBranch.addChild(getModelBox(Color.WHITE));      
    // Allow appearance change on all children
    setModelCapabilities(waitBranch);
    
    pieceTransformGroup.addChild(waitBranch);
    
    // Set piece model initial location, orientation and size      
    updatePieceOfFurnitureTransform();
    
    // Load piece real 3D model
    Content model = piece.getModel();
    ModelManager.getInstance().loadModel(model, waitModelAndTextureLoadingEnd,
        new ModelManager.ModelObserver() {
          public void modelUpdated(BranchGroup modelRoot) {
            float [][] modelRotation = piece.getModelRotation();
            // Add piece model scene to a normalized transform group
            TransformGroup modelTransformGroup = 
                ModelManager.getInstance().getNormalizedTransformGroup(modelRoot, modelRotation, 1);
            updatePieceOfFurnitureModelNode(modelRoot, modelTransformGroup, ignoreDrawingMode, waitModelAndTextureLoadingEnd);            
          }
          
          public void modelError(Exception ex) {
            // In case of problem use a default red box
            updatePieceOfFurnitureModelNode(getModelBox(Color.RED), new TransformGroup(), ignoreDrawingMode, waitModelAndTextureLoadingEnd);            
          }
        });
  }

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  /**
   * Returns the node of the filled model.
   */
  private Node getFilledModelNode() {
    TransformGroup transformGroup = (TransformGroup)getChild(0);
    BranchGroup branchGroup = (BranchGroup)transformGroup.getChild(0);
    return branchGroup.getChild(0);
  }

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  /**
   * Returns the node of the outline model.
   */
  private Node getOutlineModelNode() {
    TransformGroup transformGroup = (TransformGroup)getChild(0);
    BranchGroup branchGroup = (BranchGroup)transformGroup.getChild(0);
    if (branchGroup.numChildren() > 1) {
      return branchGroup.getChild(1);
    } else {
      return null;
    }

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      modelBranch.addChild(createOutlineModelNode(normalization));
    }


    setModelCapabilities(modelBranch);


    TransformGroup transformGroup = (TransformGroup)getChild(0);
    // Remove previous nodes    
    transformGroup.removeAllChildren();
    // Add model branch to live scene
    transformGroup.addChild(modelBranch);
    
    // Update piece color, visibility and model mirror in dispatch thread as
    // these attributes may be changed in that thread
    updatePieceOfFurnitureColorAndTexture(waitTextureLoadingEnd);      
    updatePieceOfFurnitureVisibility();

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    groundHome.getEnvironment().setGroundColor(home.getEnvironment().getGroundColor());
    groundHome.getEnvironment().setGroundTexture(home.getEnvironment().getGroundTexture());
    Ground3D ground = new Ground3D(groundHome, -1E7f / 2, -1E7f / 2, 1E7f, 1E7f, true);
    Transform3D translation = new Transform3D();
    translation.setTranslation(new Vector3f(0, -0.1f, 0));
    TransformGroup groundTransformGroup = new TransformGroup(translation);
    groundTransformGroup.addChild(ground);
    exportNode(groundTransformGroup, true, true, silk);


    HomeTexture skyTexture = home.getEnvironment().getSkyTexture();
    this.useSunSky = skyTexture == null || !(home.getCamera() instanceof ObserverCamera);
    if (!this.useSunSky) {

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            t.rotX(Math.PI/2);
            tl.z += BoardModel.HEX_DIAMETER;
        }
        t.setScale(new Vector3d(2*BoardModel.HEX_SIDE_LENGTH, BoardModel.HEX_DIAMETER, 1.0));
        t.setTranslation(tl);
        TransformGroup anim = new TransformGroup();
        anim.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        anim.addChild(tileManager.getArtilleryTarget(type));
        TransformGroup tg = new TransformGroup(t);
        tg.addChild(anim);
        addChild(tg);
        
        // FIXME: somehow, this looks weird. find mistake.
        //RotationInterpolator ri = new RotationInterpolator(C.defAlpha, anim);
        //ri.setSchedulingBounds(BoardModel.bounds);

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        BranchGroup back = new BranchGroup();
        Appearance sapp = new Appearance();
        sapp.setColoringAttributes(new ColoringAttributes(SKY, ColoringAttributes.SHADE_FLAT));
        sapp.setPolygonAttributes(C.noCull);
        sapp.setTexture(tileManager.getTexture("data/images/misc/clouds.jpg"));
        TransformGroup tg = new TransformGroup(new Transform3D(C.mkquat(1, 0, 0, Math.PI/2), new Vector3d(), 1.0));
        tg.addChild(new Sphere(1f, Primitive.GENERATE_TEXTURE_COORDS, 100, sapp));
        back.addChild(tg);
        Background bg = new Background(back);
        bg.setApplicationBounds(bounds);
        addChild(bg);
    }

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            Transform3D t = new Transform3D();


            t.rotX(pitch(entity));
            t.setScale(scale);


            mech = new TransformGroup(t);
            mech.addChild(sh);
        }
        mech.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);


        Transform3D ftrans = new Transform3D();
        ftrans.rotZ(facing(dir));
        ftrans.setTranslation(location(hex, c, elevation, height(entity)));
        facing = new TransformGroup(ftrans);
        facing.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        facing.addChild(mech);


        if (entity.getECMRange() != Entity.NONE) {
            int range = entity.getECMRange();
            Appearance eapp = new Appearance();
            eapp.setColoringAttributes(new ColoringAttributes(c50, ColoringAttributes.SHADE_FLAT));
            TransparencyAttributes ta = new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.90f);
            ta.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
            eapp.setTransparencyAttributes(ta);
            TransparencyInterpolator ti = new TransparencyInterpolator(C.halfAlpha, ta, .90f, .97f);
            ti.setSchedulingBounds(BoardModel.bounds);
            addChild(ti);
            eapp.setPolygonAttributes(C.noCull);
            Shape3D ecm = makeECMArea(range);
            ecm.setAppearance(eapp);
            ecm.setPickable(false);
            facing.addChild(ecm);
            ecm = makeECMBorder(range);
            ecm.setAppearance(eapp);
            ecm.setPickable(false);
            facing.addChild(ecm);
            eapp = new Appearance();
            eapp.setColoringAttributes(new ColoringAttributes(c50, ColoringAttributes.SHADE_FLAT));
            eapp.setLineAttributes(C.defLine);
            ecm = makeECMOutline(range);
            ecm.setAppearance(eapp);
            ecm.setPickable(false);
            facing.addChild(ecm);
        }
        
        Appearance sapp = new Appearance();
        sapp.setMaterial(new Material(new Color3f(tint), C.black, c50, C.white, 64.0f));


        Cone co = new Cone();
        co.setAppearance(sapp);


        if (dir != sdir) {
            TransformGroup fscale = new TransformGroup();
            fscale.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
            ScaleInterpolator si = new ScaleInterpolator(C.dblAlpha, fscale);
            si.setSchedulingBounds(BoardModel.bounds);
            si.setMinimumScale(.8f);
            si.setMaximumScale(1.25f);
            fscale.addChild(co);
            Transform3D sftrans = new Transform3D();
            sftrans.rotZ(facing(sdir-dir));
            Vector3d sv = new Vector3d(0.0, 5*BoardModel.HEX_DIAMETER/12, 0.0);
            sftrans.transform(sv);
            sftrans.setTranslation(sv);
            TransformGroup sfacing = new TransformGroup(sftrans);
            sfacing.addChild(fscale);
            sfacing.addChild(si);
            facing.addChild(sfacing);
        }


        label = new TransformGroup(new Transform3D(C.nullRot, labelLocation(hex, c, elevation), 1.0));
        label.addChild(view.makeViewRelative(new LabelModel(entity.getShortName(), C.white, c50, LabelModel.BOLD), BoardModel.HEX_DIAMETER*.45));
        label.setPickable(false);
        label.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);


        addChild(facing);

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