Examples of javax.media.j3d.Transform3D

javax.media.j3d.Transform3D
A generalized transform object represented internally as a 4x4 double-precision floating point matrix. The mathematical representation is row major, as in traditional matrix mathematics. A Transform3D is used to perform translations, rotations, and scaling and shear effects.
A transform has an associated type, and all type classification is left to the Transform3D object. A transform will typically have multiple types, unless it is a general, unclassifiable matrix, in which case it won't be assigned a type.
The Transform3D type is internally computed when the transform object is constructed and updated any time it is modified. A matrix will typically have multiple types. For example, the type associated with an identity matrix is the result of ORing all of the types, except for ZERO and NEGATIVE_DETERMINANT, together. There are public methods available to get the ORed type of the transformation, the sign of the determinant, and the least general matrix type. The matrix type flags are defined as follows:
- ZERO - zero matrix. All of the elements in the matrix have the value 0.
- IDENTITY - identity matrix. A matrix with ones on its main diagonal and zeros every where else.
- SCALE - the matrix is a uniform scale matrix - there are no rotational or translation components.
- ORTHOGONAL - the four row vectors that make up an orthogonal matrix form a basis, meaning that they are mutually orthogonal. The scale is unity and there are no translation components.
- RIGID - the upper 3 X 3 of the matrix is orthogonal, and there is a translation component-the scale is unity.
- CONGRUENT - this is an angle- and length-preserving matrix, meaning that it can translate, rotate, and reflect about an axis, and scale by an amount that is uniform in all directions. These operations preserve the distance between any two points, and the angle between any two intersecting lines.
- AFFINE - an affine matrix can translate, rotate, reflect, scale anisotropically, and shear. Lines remain straight, and parallel lines remain parallel, but the angle between intersecting lines can change.
A matrix is also classified by the sign of its determinant:
The Java 3D model for 4 X 4 transformations is:
Note: When transforming a Point3f or a Point3d, the input w is set to 1. When transforming a Vector3f or Vector3d, the input w is set to 0.

        MultiTransformGroup mtg = universe.getViewingPlatform().getMultiTransformGroup();
        View view = universe.getViewer().getView();
        view.setScreenScale(.001);


        TransformGroup rotateTrans = mtg.getTransformGroup(2);
        Transform3D rtrans = new Transform3D();
        rtrans.rotX(-Math.PI/2);
        rotateTrans.setTransform(rtrans);
    }

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        view.setProjectionPolicy(View.PARALLEL_PROJECTION);
        view.setScreenScalePolicy(View.SCALE_EXPLICIT);
        view.setScreenScale(.001);


        TransformGroup panTrans = mtg.getTransformGroup(1);
        Transform3D ptrans = new Transform3D();
        ptrans.rotX(Math.PI/2);
        panTrans.setTransform(ptrans);


        TransformGroup rotateTrans = mtg.getTransformGroup(2);
        Transform3D rtrans = new Transform3D();
        rtrans.rotX(-Math.PI/2);
        rotateTrans.setTransform(rtrans);


        Transform3D etrans = new Transform3D();
        etrans.lookAt(new Point3d(0.0, 0.0, 20*BoardModel.HEX_DIAMETER), new Point3d(0, 0, 0), new Vector3d(0, 1, 0));
        etrans.invert();
        mtg.getTransformGroup(5).setTransform(etrans);


        MouseWheelZoom behavior0 = new MouseWheelZoom(wheel);
        behavior0.setFactor(1.0/3);
        behavior0.setupCallback(this);

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    ArrowModel() {
        setCapability(ALLOW_DETACH);
        anim.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);


        RotationInterpolator ri = new RotationInterpolator(C.defAlpha, anim, new Transform3D(), 0.0f, 2*(float)Math.PI);
        ri.setSchedulingBounds(BoardModel.bounds);
        anim.addChild(ri);
    }

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        Quat4d rot = new Quat4d();
        rot.set(new AxisAngle4d(destination0, angle));
        diff.scale(.5);
        destination.add(diff);


        TransformGroup tg = new TransformGroup(new Transform3D(rot, new Vector3d(destination), 1.0));
        tg.addChild(link);
        addChild(tg);
        setCapability(ALLOW_DETACH);
        setPickable(false);
    }

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        setUserData(new Coords(c));
        ypos = 0;
        addText(""+c.getBoardNum(), new Color3f(GUIPreferences.getInstance().getMapTextColor()));
        final Point3d hexLoc = BoardModel.getHexLocation(c, h.floor());
        setTransform(new Transform3D(C.nullRot, new Vector3d(hexLoc), 1.0));


        // Water surface
        if (surface == null && hex.depth() > 0) {
            TransformGroup sTrans = new TransformGroup(new Transform3D(C.nullRot, new Vector3d(0.0, 0.0, hex.depth()*BoardModel.HEX_HEIGHT), 1.0));
            surface = new Shape3D(polygon);
            surface.setCapability(Shape3D.ALLOW_APPEARANCE_READ);
            surface.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
            surface.setPickable(true);
            setSurfaceEffect(current, tileManager.getTexture(h, 2/3f));

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        // FIXME: this needs much more detailed processing... but it is good enough for now
        int ih = Math.max(hex.terrainLevel(Terrains.BLDG_ELEV), hex.terrainLevel(Terrains.BRIDGE_ELEV));
        double height = Math.max(ih, Math.max(hex.terrainLevel(Terrains.SMOKE), hex.terrainLevel(Terrains.FIRE)))*BoardModel.HEX_HEIGHT;
        if (height < 1.0) height = 1.0;
        height += (hex.surface() - hex.floor()) * BoardModel.HEX_HEIGHT;
        Transform3D supert = new Transform3D();
        supert.setScale(new Vector3d(2*BoardModel.HEX_SIDE_LENGTH, BoardModel.HEX_DIAMETER, height));
        supert.setTranslation(new Vector3d(0.0, 0.0, height/2));
        TransformGroup superTrans = new TransformGroup(supert);
        List<Shape3D> supers = tileManager.getModels(hex);
        for (Shape3D sup : supers) {
            superTrans.addChild(sup);
        }
        
        superTrans.setPickable(false);
        addChild(superTrans);


        // wood
        if (Math.max(hex.terrainLevel(Terrains.WOODS), hex.terrainLevel(Terrains.JUNGLE)) > 0) {
            supert = new Transform3D();
            supert.setScale(new Vector3d(2*BoardModel.HEX_SIDE_LENGTH, BoardModel.HEX_DIAMETER, 2*BoardModel.HEX_HEIGHT));
            supert.setTranslation(new Vector3d(0.0, 0.0, BoardModel.HEX_HEIGHT));
            superTrans = new TransformGroup(supert);
            superTrans.addChild(tileManager.getModel(hex));


            superTrans.setPickable(false);
            addChild(superTrans);

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    private void setEffect(Material mat, Texture tex) {
        current = mat;
        Appearance app = new Appearance();
        app.setTexture(tex);
        app.setMaterial(current);
        app.setTextureAttributes(new TextureAttributes(TextureAttributes.MODULATE, new Transform3D(), new Color4f(), TextureAttributes.NICEST));
        floor.setAppearance(app);
        
        if (surface != null) setSurfaceEffect(mat, surface.getAppearance().getTexture());
    }

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        setEffect(normal);
    }


    private int ypos = 0;
    private final void addText(String s, Color3f col) {
        Transform3D t = new Transform3D();
        t.setTranslation(new Vector3d(0.0, -BoardModel.HEX_DIAMETER/3-3.5+ypos*2.75, hex.depth()*BoardModel.HEX_HEIGHT));
        TransformGroup tg = new TransformGroup(t);
        tg.addChild(new LabelModel(s, col, null, LabelModel.BIG));
        addChild(tg);
        ypos++;
    }

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        sw.addChild(makeQuad(lower.x, lower.y+(upper.y-lower.y)/4, upper.x-lower.x, (upper.y-lower.y)/2, 0, app));


        addChild(sw);
        addChild(lod);


        setTransform(new Transform3D(C.nullRot, new Vector3d(0,0,0.1), 1.0));


        if (bg != null) {
            app = new Appearance();
            app.setColoringAttributes(new ColoringAttributes(bg, ColoringAttributes.SHADE_FLAT));
            app.setPolygonAttributes(new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_BACK, 10.0f));

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        double angle = target0.angle(new Vector3d(0.0, -1.0, 0.0));
        target0.cross(target0, new Vector3d(0.0, -1.0, 0.0));
        Quat4d rot = new Quat4d();
        rot.set(new AxisAngle4d(target0, angle));


        TransformGroup tg = new TransformGroup(new Transform3D(rot, new Vector3d(source), 1.0));
        tg.addChild(anim);
        
        labelLocation = new Vector3d(target);
        labelLocation.negate();
        labelLocation.add(source);

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