/*
 *	@(#)PolygonOffset.java 1.48 99/05/20 14:07:00
 *
 * Copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
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 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
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 * redistribute the Software for such purposes.
 */

import javax.swing.*;
import javax.swing.event.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;

public class PolygonOffset extends JFrame implements ChangeListener {

    PolygonAttributes solidPa;
    PolygonAttributes wirePa;
    JSlider dynamicOffsetSlider;
    JSlider staticOffsetSlider;
    JLabel dynamicSliderValueLabel;
    JLabel staticSliderValueLabel;
    float dynamicOffset = 1.0f;
    float staticOffset = 1.0f;

    public BranchGroup createSceneGraph() {
	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();

	// Create the transform group node and initialize it to the
	// identity.  Enable the TRANSFORM_WRITE capability so that
	// our behavior code can modify it at runtime.  Add it to the
	// root of the subgraph.
	TransformGroup objTrans = new TransformGroup();
	objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	objRoot.addChild(objTrans);

	// Create a Sphere.  We will display this as both wireframe and 
	// solid to make a hidden line display
	// wireframe
	Appearance wire = new Appearance();

	wirePa = new PolygonAttributes(
				       PolygonAttributes.POLYGON_LINE, 
				       PolygonAttributes.CULL_BACK, 
				       0.0f);
	wire.setPolygonAttributes(wirePa);
	Sphere wireSphere = new Sphere(0.7f, wire);
	objTrans.addChild(wireSphere);

	// solid
	Color3f red = new Color3f(1.0f, 0.0f, 0.0f);
	ColoringAttributes solidCa = new ColoringAttributes(red,
	    ColoringAttributes.SHADE_FLAT);
	Material solidMat = new Material();
	solidMat.setLightingEnable(false);
	Appearance solid = new Appearance();
	solid.setMaterial(solidMat);
	solid.setColoringAttributes(solidCa);
	solidPa = new PolygonAttributes(
			PolygonAttributes.POLYGON_FILL, 
			PolygonAttributes.CULL_BACK, 
			0.0f);
	solidPa.setPolygonOffsetFactor(dynamicOffset);
	solidPa.setPolygonOffset(staticOffset);
	solidPa.setCapability(PolygonAttributes.ALLOW_OFFSET_WRITE);
	solid.setPolygonAttributes(solidPa);
	Sphere solidSphere = new Sphere(0.7f, solid);
	objTrans.addChild(solidSphere);

	// Create a new Behavior object that will perform the desired
	// operation on the specified transform object and add it into
	// the scene graph.
        AxisAngle4f axisAngle = new AxisAngle4f(0.0f, 0.0f, 1.0f, 
                                                -(float)Math.PI / 2.0f);
	Transform3D yAxis = new Transform3D();
	Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
					0, 0,
					80000, 0, 0,
					0, 0, 0);

	RotationInterpolator rotator =
	    new RotationInterpolator(rotationAlpha, objTrans, yAxis,
				     0.0f, (float) Math.PI*2.0f);
	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
	rotator.setSchedulingBounds(bounds);
	objTrans.addChild(rotator);

        // Have Java 3D perform optimizations on this scene graph.
        objRoot.compile();

	return objRoot;
    }

    public void stateChanged(ChangeEvent e) {
	JSlider source = (JSlider)e.getSource();
	if (source == dynamicOffsetSlider) {
	    dynamicOffset = source.getValue() / 10.0f;
	    dynamicSliderValueLabel.setText(Float.toString(dynamicOffset));
	    solidPa.setPolygonOffsetFactor(dynamicOffset);
	} else if (source == staticOffsetSlider) {
	    staticOffset = source.getValue() / 10.0f;
	    staticSliderValueLabel.setText(Float.toString(staticOffset));
	    solidPa.setPolygonOffset(staticOffset);
	}
    }

    public PolygonOffset() {
	super("Polygon Offset");
	JPanel contentPane = new JPanel();
	contentPane.setLayout(new BorderLayout());

        GraphicsConfiguration config =
           SimpleUniverse.getPreferredConfiguration();

	Canvas3D canvas = new Canvas3D(config);
	canvas.setSize(800, 800);
	contentPane.add(canvas, BorderLayout.CENTER);
	setContentPane(contentPane);

	// Create a simple scene and attach it to the virtual universe
	BranchGroup scene = createSceneGraph();
	SimpleUniverse u = new SimpleUniverse(canvas);

        // This will move the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        u.getViewingPlatform().setNominalViewingTransform();

	u.addBranchGraph(scene);

	// set up the sliders
	JPanel sliderPanel = new JPanel();
	JLabel dynamicSliderLabel = new JLabel("Dynamic Offset");
	sliderPanel.add(dynamicSliderLabel);
	dynamicOffsetSlider = new JSlider(JSlider.HORIZONTAL, 0, 20, 
		(int) dynamicOffset * 10);
	dynamicOffsetSlider.addChangeListener(this);
	sliderPanel.add(dynamicOffsetSlider);
	dynamicSliderValueLabel = new JLabel(Float.toString(dynamicOffset));
	sliderPanel.add(dynamicSliderValueLabel);
	JLabel staticSliderLabel = new JLabel("Static Offset");
	sliderPanel.add(staticSliderLabel);
	staticOffsetSlider = new JSlider(JSlider.HORIZONTAL, 0, 100, 
		(int) staticOffset * 10);
	staticOffsetSlider.addChangeListener(this);
	sliderPanel.add(staticOffsetSlider);
	staticSliderValueLabel = new JLabel(Float.toString(staticOffset));
	sliderPanel.add(staticSliderValueLabel);
	contentPane.add(sliderPanel, BorderLayout.SOUTH);

	pack();
	show();
    }

    //
    // The following allows PolygonOffset to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
	new PolygonOffset();
    }
}