package elte.java2_utikalauz5.java3d;

import java.awt.*;
import java.awt.event.*;
import java.util.Enumeration;
import javax.vecmath.*;
import javax.media.j3d.*;

/**
Kockaforgatási példa.
Az egérgombot nyomvatartva forgatható a kocka.

@link.forrásfájl {@docRoot}/../data/java3d/src BehaviorDemo.java
@link.letöltés {@docRoot}/../data/java3d BehaviorDemo.jar
@since Java 2 Útikalauz programozóknak 5.0
*/
class BehaviorDemo extends Frame {

    /** Verziószám */
    private final static long serialVersionUID = 15L;

	public static void main(String[] args)
	{
		new BehaviorDemo();
	}

	public BehaviorDemo()
	{
		super("BehaviorDemo - Drag the mouse");
        enableEvents(java.awt.AWTEvent.WINDOW_EVENT_MASK);

		GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getBestConfiguration(new GraphicsConfigTemplate3D());
		Canvas3D c = new Canvas3D(config);
		add(c);

		UniverseBuilder u = new UniverseBuilder(c);
		BranchGroup scene = createSceneGraph();
		u.addBranchGraph(scene);

		setSize(300,270);
		setVisible(true);
	}

        /**
        Ablakesemény feldolgozása, bezáráskor kilépés.

        @param esemény A fellépett esemény
        */
        @Override
        protected void processWindowEvent(java.awt.event.WindowEvent esemény) {
            if (esemény.getID() == esemény.WINDOW_CLOSING) System.exit(0);
            super.processWindowEvent( esemény );
        }

	public BranchGroup createSceneGraph()
	{
		BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

		BranchGroup branchGroup = new BranchGroup();
		TransformGroup transformGroup = new TransformGroup(new Transform3D());
		transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

		RotateBehavior rotateBehavior = new RotateBehavior(transformGroup);
		rotateBehavior.setSchedulingBounds(bounds);

		transformGroup.addChild(new ColorCube().getShape());
		branchGroup.addChild(transformGroup);
		branchGroup.addChild(rotateBehavior);
		return branchGroup;
	}

class UniverseBuilder {
	Locale			locale;

	UniverseBuilder(Canvas3D c)
	{
		Transform3D t = new Transform3D();
		t.set(1,new Vector3d(0.0,0.0,5.0));

		VirtualUniverse	universe = new VirtualUniverse();
		locale = new Locale(universe);

		PhysicalBody body = new PhysicalBody();
		PhysicalEnvironment environment = new PhysicalEnvironment();
		BranchGroup viewPlatformBranchGroup = new BranchGroup();
		TransformGroup viewPlatformTransformGroup = new TransformGroup(t);
		ViewPlatform viewPlatform = new ViewPlatform();

		View view = new View();
		view.addCanvas3D(c);
		view.setPhysicalBody(body);
		view.setPhysicalEnvironment(environment);
		view.attachViewPlatform(viewPlatform);

		viewPlatformTransformGroup.addChild(viewPlatform);
		viewPlatformBranchGroup.addChild(viewPlatformTransformGroup);
		locale.addBranchGraph(viewPlatformBranchGroup);
	}

	void addBranchGraph(BranchGroup bg)
	{
		locale.addBranchGraph(bg);
	}
}

class ColorCube {
	double verts[] = {
		// elso lap
		1.0, -1.0,  1.0,	1.0,  1.0,  1.0,
		-1.0,  1.0,  1.0,	-1.0, -1.0,  1.0,
		// hatso lap
		-1.0, -1.0, -1.0,	-1.0,  1.0, -1.0,
		1.0,  1.0, -1.0,	1.0, -1.0, -1.0,
		// jobb lap
		1.0, -1.0, -1.0,	1.0,  1.0, -1.0,
		1.0,  1.0,  1.0,	1.0, -1.0,  1.0,
		// bal lap
		-1.0, -1.0,  1.0,	-1.0,  1.0,  1.0,
		-1.0,  1.0, -1.0,	-1.0, -1.0, -1.0,
		// fedo lap
		1.0,  1.0,  1.0,	1.0,  1.0, -1.0,
		-1.0,  1.0, -1.0,	-1.0,  1.0,  1.0,
		// alaplap
		-1.0, -1.0,  1.0,	-1.0, -1.0, -1.0,
		1.0, -1.0, -1.0,	1.0, -1.0,  1.0
	};

	float[] colors = {
		// elso lap (piros)
		1.0f, 0.0f, 0.0f,		1.0f, 0.0f, 0.0f,
		1.0f, 0.0f, 0.0f,		1.0f, 0.0f, 0.0f,
		// hatso lap (zold)
		0.0f, 1.0f, 0.0f,		0.0f, 1.0f, 0.0f,
		0.0f, 1.0f, 0.0f,		0.0f, 1.0f, 0.0f,
		// jobb lap (kek)
		0.0f, 0.0f, 1.0f,		0.0f, 0.0f, 1.0f,
		0.0f, 0.0f, 1.0f,		0.0f, 0.0f, 1.0f,
		// bal lap (sarga)
		1.0f, 1.0f, 0.0f,		1.0f, 1.0f, 0.0f,
		1.0f, 1.0f, 0.0f,		1.0f, 1.0f, 0.0f,
		// fedo lap (magenta)
		1.0f, 0.0f, 1.0f,		1.0f, 0.0f, 1.0f,
		1.0f, 0.0f, 1.0f,		1.0f, 0.0f, 1.0f,
		// alaplap (cian)
		0.0f, 1.0f, 1.0f,		0.0f, 1.0f, 1.0f,
		0.0f, 1.0f, 1.0f,		0.0f, 1.0f, 1.0f
	};

	private Shape3D shape;

	public ColorCube()
	{
		QuadArray cube = new QuadArray(24, QuadArray.COORDINATES | QuadArray.COLOR_3);

		cube.setCoordinates(0, verts);
		cube.setColors(0, colors);

		shape = new Shape3D(cube, new Appearance());
	}

	public Shape3D getShape()
	{
		return shape;
	}
}

class RotateBehavior extends Behavior
{
	double x_factor=0.01;
	double y_factor=0.01;
	int last_x, last_y;
	WakeupOr mouseCriterion;
	TransformGroup transformGroup;

	public RotateBehavior(TransformGroup transformGroup)
	{
		this.transformGroup=transformGroup;
	}

	public void initialize()
	{
		WakeupCriterion[] mouseEvents = new WakeupCriterion[2];
		mouseEvents[0] = new WakeupOnAWTEvent(MouseEvent.MOUSE_DRAGGED);
		mouseEvents[1] = new WakeupOnAWTEvent(MouseEvent.MOUSE_PRESSED);
		mouseCriterion = new WakeupOr(mouseEvents);
		last_x=last_y=0;

		wakeupOn (mouseCriterion);
	}

	public void processStimulus (Enumeration criteria)
	{
		AWTEvent[] event = ((WakeupOnAWTEvent)criteria.nextElement()).getAWTEvent();
		for (int i=0; i<event.length; i++)
		{
			if (event[i].getID()==MouseEvent.MOUSE_PRESSED)
			{
				last_x = ((MouseEvent)event[i]).getX();
				last_y = ((MouseEvent)event[i]).getY();
			}
			if (event[i].getID()==MouseEvent.MOUSE_DRAGGED)
			{
				int x = ((MouseEvent)event[i]).getX();
				int y = ((MouseEvent)event[i]).getY();

				int dx = x-last_x;
				int dy = y-last_y;

				last_x = x;
				last_y = y;

				double x_angle = dy * y_factor;
				double y_angle = dx * x_factor;

				Transform3D trX = new Transform3D();
				Transform3D trY = new Transform3D();
				trX.rotX(x_angle);
				trY.rotY(y_angle);

				Transform3D currentTransform = new Transform3D();
				transformGroup.getTransform(currentTransform);
				currentTransform.mul(trX,currentTransform);
				currentTransform.mul(trY,currentTransform);

				transformGroup.setTransform(currentTransform);
			}

		}

		wakeupOn(mouseCriterion);
	}
}
} //class