// Java 3D Test Applet
// ColorInterpolatorTest.java
//   Copyright (c) 1999 ENDO Yasuyuki
//                      mailto:yasuyuki@javaopen.org
//                      http://www.javaopen.org/j3dbook/index.html

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;

public class ColorInterpolatorTest extends Applet {
  private AlphaPanel apanel = null;

  private Appearance app = null;
  private Color3f scolor = new Color3f(1.0f, 0.0f, 0.0f);
  private Color3f ecolor = new Color3f(0.0f, 0.0f, 1.0f);
  private ColorInterpolator cinterp = null;

  public ColorInterpolatorTest() {
    this.setLayout(new BorderLayout());
    
    apanel = new AlphaPanel();
    this.add(apanel, BorderLayout.NORTH);

    Panel cpanel = new Panel();
    cpanel.setLayout( new GridLayout(2, 1) );
    this.add(cpanel, BorderLayout.SOUTH);
    
    Panel[] cpanels = new Panel[2];
    for (int i=0; i<2; i++) {
      cpanels[i] = new Panel();
      cpanel.add(cpanels[i]);
    }
    
    final Button sbutton = new Button("Stop");
    sbutton.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        String blabel = sbutton.getLabel();
        if (blabel.equals("Start")) {
	  cinterp.setEnable(true);
	  apanel.reset();

          sbutton.setLabel("Stop");
        } else if (blabel.equals("Stop")) {
	  cinterp.setEnable(false);

          sbutton.setLabel("Start");
        }
      }
    });
    cpanels[0].add(sbutton);

    cpanels[0].add( new Label("Start -") );
    TuplePanel stp = new TuplePanel(scolor);
    stp.addTupleEventListener( new TupleEventListener() {
      public void tupleStateChanged(TupleEvent e) {
	Color3f color = e.getColor3f();
	cinterp.setStartColor(color);
      }
    });
    cpanels[0].add(stp);

    cpanels[1].add( new Label("End -") );
    TuplePanel etp = new TuplePanel(ecolor);
    etp.addTupleEventListener( new TupleEventListener() {
      public void tupleStateChanged(TupleEvent e) {
	Color3f color = e.getColor3f();
	cinterp.setEndColor(color);
      }
    });
    cpanels[1].add(etp);
    
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas = new Canvas3D(config);
    this.add(canvas, BorderLayout.CENTER);
    
    SimpleUniverse universe = new SimpleUniverse(canvas);
    universe.getViewingPlatform().setNominalViewingTransform();

    BranchGroup scene = createSceneGraph();
    universe.addBranchGraph(scene);
  }
  
  private BranchGroup createSceneGraph() {
    BranchGroup root = new BranchGroup();
    root.setCapability(BranchGroup.ALLOW_DETACH);
    
    DirectionalLight light =
      new DirectionalLight( new Color3f(1.0f, 1.0f, 1.0f),
                            new Vector3f(-0.57f, -0.57f, -0.57f) );
    BoundingSphere bounds = new BoundingSphere(new Point3d(), 100.0);
    light.setInfluencingBounds(bounds);
    root.addChild(light);
    
    AmbientLight alight = new AmbientLight();
    alight.setInfluencingBounds(bounds);
    root.addChild(alight);

    TransformGroup trans = new TransformGroup();
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    trans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    root.addChild(trans);
    
    MouseRotate rotator = new MouseRotate();
    rotator.setSchedulingBounds(bounds);
    rotator.setTransformGroup(trans);
    root.addChild(rotator);
    
    Heart heart = new Heart();
    app = createAppearance();
    Shape3D shape = new Shape3D( heart.getGeometry(), app );
    trans.addChild(shape);
    
    cinterp = createInterpolator( apanel.getAlpha(), app.getMaterial() );
    root.addChild(cinterp);

    return root;
  }

  private ColorInterpolator createInterpolator(Alpha alpha, Material mat) {
    ColorInterpolator cinterp =
      new ColorInterpolator(alpha, mat, scolor, ecolor);
    cinterp.setSchedulingBounds(new BoundingSphere(new Point3d(), 100.0));
    return cinterp;
  }
  
  private Appearance createAppearance() {
    Appearance app = new Appearance();
    app.setCapability(Appearance.ALLOW_MATERIAL_READ);
    app.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
    
    Material mat = new Material();
    mat.setCapability(Material.ALLOW_COMPONENT_READ);
    mat.setCapability(Material.ALLOW_COMPONENT_WRITE);
    mat.setDiffuseColor( new Color3f(1.0f, 0.0f, 0.0f) );
    mat.setShininess(100.0f);
    
    app.setMaterial(mat);
    
    return app;
  }

  public static void main(String[] args) {
    ColorInterpolatorTest applet = new ColorInterpolatorTest();
    Frame frame = new MainFrame(applet, 500, 500);
  }
}