// Java 3D Test Applet
// TransparencyInterpolatorTest.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;
import com.sun.j3d.utils.image.TextureLoader;

public class TransparencyInterpolatorTest extends Applet {
  private boolean isStandalone = false;
  
  private AlphaPanel apanel = null;
  private TransparencyInterpolator tinterp = null;

  public TransparencyInterpolatorTest() { this(false);  }
  
  public TransparencyInterpolatorTest(boolean isStandalone) {
    isStandalone = isStandalone;

    this.setLayout(new BorderLayout());

    apanel = new AlphaPanel();
    this.add(apanel, BorderLayout.NORTH);

    Panel tpanel = new Panel();
    this.add(tpanel, BorderLayout.SOUTH);
    
    final Button sbutton = new Button("Stop");
    sbutton.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        String blabel = sbutton.getLabel();
        if (blabel.equals("Start")) {
          tinterp.setEnable(true);
	  apanel.reset();
          sbutton.setLabel("Stop");
        } else if (blabel.equals("Stop")) {
          tinterp.setEnable(false);
          sbutton.setLabel("Start");
        }
      }
    });
    tpanel.add(sbutton);
    
    tpanel.add( new Label("Mimimum") );
    TextField minfield = new TextField("0.0");
    minfield.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        float t = 0.0f;
        try {
          t = Float.parseFloat(e.getActionCommand());
          if (t < 0.0f) t = 0.0f;
          if (t > 1.0f) t = 1.0f;
          tinterp.setMinimumTransparency(t);
        } catch (NumberFormatException ex) {}
      }
    });
    tpanel.add(minfield);
    
    tpanel.add( new Label("Maximum") );
    TextField maxfield = new TextField("1.0");
    maxfield.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        float t = 0.0f;
        try {
          t = Float.parseFloat(e.getActionCommand());
          if (t < 0.0f) t = 0.0f;
          if (t > 1.0f) t = 1.0f;
          tinterp.setMaximumTransparency(t);
        } catch (NumberFormatException ex) {}
      }
    });
    tpanel.add(maxfield);
  }
  
  public void init() {    
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas = new Canvas3D(config);
    this.add(canvas, BorderLayout.CENTER);
    
    SimpleUniverse universe = new SimpleUniverse(canvas);
    universe.getViewingPlatform().setNominalViewingTransform();
    
    universe.addBranchGraph(createSceneGraph());
  }
  
  private BranchGroup createSceneGraph() {
    BranchGroup root = new BranchGroup();
    
    BoundingSphere bounds = new BoundingSphere(new Point3d(), 100.0);

    Background background = createBackground(bounds);
    root.addChild(background);
    
    DirectionalLight light =
      new DirectionalLight( new Color3f(1.0f, 1.0f, 1.0f),
                            new Vector3f(-0.57f, -0.57f, -0.57f) );
    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();
    Appearance app = createAppearance();
    Shape3D shape = new Shape3D( heart.getGeometry(), app );
    trans.addChild(shape);
    
    tinterp =
      new TransparencyInterpolator( apanel.getAlpha(),
				    app.getTransparencyAttributes() );
    tinterp.setSchedulingBounds(bounds);
    root.addChild(tinterp);
    
    return root;
  }

  private Background createBackground(Bounds bounds) {
    // Texture の生成
    Image image = null;
    if (isStandalone) {
      // アプリケーションとして実行されている
      Toolkit toolkit = Toolkit.getDefaultToolkit();
      image = toolkit.getImage("bg.jpg");
    } else {
      // アプレットとして実行されている
      image = getImage(getCodeBase(), "bg.jpg");
    }
    MediaTracker mt = new MediaTracker(this);
    mt.addImage(image, 0);
    mt.checkAll(true);
    try { mt.waitForID(0); } catch (InterruptedException e) { e.printStackTrace(); }
    TextureLoader loader = new TextureLoader(image, this);
    Background bg = new Background(loader.getImage());
    bg.setCapability(Background.ALLOW_COLOR_READ);
    bg.setCapability(Background.ALLOW_COLOR_WRITE);
    bg.setCapability(Background.ALLOW_IMAGE_WRITE);
    bg.setApplicationBounds(bounds);
    return bg;
  }
  
  
  private Appearance createAppearance() {
    Appearance app = new Appearance();
    app.setCapability(Appearance.ALLOW_MATERIAL_READ);
    app.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
    
    Material mat = new Material();
    mat.setDiffuseColor( new Color3f(1.0f, 0.0f, 0.0f) );
    mat.setShininess(100.0f);
    
    TransparencyAttributes tattr =
      new TransparencyAttributes(TransparencyAttributes.FASTEST, 0.0f);
    tattr.setCapability(TransparencyAttributes.ALLOW_VALUE_READ);
    tattr.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
    app.setTransparencyAttributes(tattr);
    
    app.setMaterial(mat);
    
    return app;
  }

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