Exercise 6 : House Display

You will define at least 3 Java Class to display a little house in a Canvas3D and allow people to look at it from different viewpoint.

Extend a Canvas3D class : Board3D

That class will contain all the 3D stuff and will receive demand from the JFrame class

Extend a JFrame Class : ApplicationFrame

That class will use a a Board3D object and 1 + 6 JButtons. A press of a button will change the viewPoint of the scene by rotating it with a parametrable angle around one of the 3 axes. A button should allow the user to go back to the default view.

Extend a Shape object : PersoShape

The first instance of object that we will draw will be an house made with IndexedQuadArray object. Width : 6 / Depth : 7 m / Height without roof : 3 m / Roof height 2 m

Tips :

a program with comments in French :-)

default viewpoint : at the center of the Local, looking at -z

other tip : rotation of a shape :

        Transform3D t3d = new Transform3D();
        t3d.rotX(Math.PI/6);
        TransformGroup tg = new TransformGroup();
        tg.setTransform(t3d);
        tg.addChild(new ColorCube());
        racine.addChild(tg);

Orientation :

Remember that default java coordinate systems are not usual...

By default, Java 3D coordinate systems are right-handed, with the orientation semantics being that +y is the local gravitational up, +x is horizontal to the right, and +z is directly toward the viewer. The default units are meters.

How to get a good GraphicsConfiguration to construct a Canvas3D ?

GraphicsEnvironment local = GraphicsEnvironment.getLocalGraphicsEnvironment();

// there coulb be more than one screen
GraphicsDevice screen = local.getDefaultScreenDevice();
GraphicsConfigTemplate3D gcTemplate = new GraphicsConfigTemplate3D();
GraphicsConfiguration configuration = screen.getBestConfiguration(gcTemplate);

// Board3D extends Canvas3D and call its 'super' constructor

mainCanvas3D = new Board3D(configuration);
mainCanvas3D.setSize(200,200);

How to do all the stuff before to be able to see anything

		//This is the root of our view branch
		viewBranch = new BranchGroup();

		//The transform that will move our view
		viewTransform = new Transform3D();
		viewTransform.set(new Vector3f(0.0f,0.0f,5.0f));

		//The transform group that will be the parent
		//of our view platform elements
		viewTransformGroup = new TransformGroup(viewTransform);
		viewTransformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		myViewPlatform = new ViewPlatform();

		//Next the physical elements are created
		myBody = new PhysicalBody();
		myEnvironment = new PhysicalEnvironment();

		//Then we put it all together
		viewTransformGroup.addChild(myViewPlatform);
		viewBranch.addChild(viewTransformGroup);
		myView = new View();
		myView.addCanvas3D(this);
		myView.attachViewPlatform(myViewPlatform);
		myView.setPhysicalBody(myBody);
		myView.setPhysicalEnvironment(myEnvironment);

		//Create a default universe and locale
		myUniverse = new VirtualUniverse();
		myLocale = new Locale(myUniverse);

		// Create the content Branch
		contentBranch = new BranchGroup();
		contentTransform = new Transform3D();
        contentTransform.set(new AxisAngle4d(1.0,1.0,0.0,Math.PI/4.0));
		contentTransformGroup = new TransformGroup(contentTransform);
		contentBranch.addChild(contentTransformGroup);
		contentTransformGroup.addChild(buildShape());
        addLights(contentBranch);

		//Use the functions to build the scene graph
		myLocale.addBranchGraph(viewBranch);
		myLocale.addBranchGraph(contentBranch);

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