// Java 3D Test Applet
// RotationInterpolatorTest.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 RotationInterpolatorTest extends Applet {
  private AlphaPanel apanel = null;
  private RotationInterpolator rinterp = null;

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

    Panel spanel = new Panel();
    this.add(spanel, 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")) {
          rinterp.setEnable(true);
	  apanel.reset();
          sbutton.setLabel("Stop");
        } else if (blabel.equals("Stop")) {
          rinterp.setEnable(false);
          sbutton.setLabel("Start");
        }
      }
    });
    spanel.add(sbutton);
    
    spanel.add( new Label("Mimimum - pi *") );
    TextField minfield = new TextField("0.0");
    minfield.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        float a = 0.0f;
        try {
          a = Float.parseFloat(e.getActionCommand());
          rinterp.setMinimumAngle(a * (float)Math.PI);
        } catch (NumberFormatException ex) {}
      }
    });
    spanel.add(minfield);
    
    spanel.add( new Label("Maximum - pi *") );
    TextField maxfield = new TextField("2.0");
    maxfield.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        float a = 0.0f;
        try {
          a = Float.parseFloat(e.getActionCommand());
          rinterp.setMaximumAngle(a * (float)Math.PI);
        } catch (NumberFormatException ex) {}
      }
    });
    spanel.add(maxfield);

    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);

    TransformGroup mtrans = new TransformGroup();
    mtrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    mtrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    mtrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    root.addChild(mtrans);
    
    MouseRotate mrotator = new MouseRotate();
    mrotator.setSchedulingBounds(bounds);
    mrotator.setTransformGroup(mtrans);
    root.addChild(mrotator);
    
    double[] vertices = { -0.8, -0.8, 0.0,
                          -0.8,  0.8, 0.0,
                          -0.4, -0.8, 0.0,
                          -0.4,  0.8, 0.0,
                           0.0, -0.8, 0.0,
                           0.0,  0.8, 0.0,
                           0.4, -0.8, 0.0,
                           0.4,  0.8, 0.0,
                           0.8, -0.8, 0.0,
                           0.8,  0.8, 0.0,
                          -0.8, -0.8, 0.0,
                           0.8, -0.8, 0.0,
                          -0.8, -0.4, 0.0,
                           0.8, -0.4, 0.0,
                          -0.8,  0.0, 0.0,
                           0.8,  0.0, 0.0,
                          -0.8,  0.4, 0.0,
                           0.8,  0.4, 0.0,
                          -0.8,  0.8, 0.0,
                           0.8,  0.8, 0.0 };

    LineArray geom = new LineArray( vertices.length / 3, GeometryArray.COORDINATES);
    geom.setCoordinates(0, vertices);
    Shape3D grid = new Shape3D(geom);
    mtrans.addChild(grid);

    Transform3D t3d = new Transform3D();
    t3d.set( new Vector3d(0.0, 0.0, 0.1) );
    TransformGroup trans = new TransformGroup(t3d);
    mtrans.addChild(trans);
    
    TransformGroup rtrans = new TransformGroup();
    rtrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    rtrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    rtrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    trans.addChild(rtrans);
    
    double[] rverts = { 0.0, 0.0, 0.0,
                        0.0, 0.6, 0.0 };
    float[] rcolors = { 0.0f, 0.0f, 1.0f,
                        0.0f, 0.0f, 1.0f };
    LineArray rline =
      new LineArray(rverts.length / 3, LineArray.COORDINATES | LineArray.COLOR_3);
    rline.setCoordinates(0, rverts);
    rline.setColors(0, rcolors);
    
    Appearance rapp = new Appearance();
    rapp.setLineAttributes(
      new LineAttributes( 6.0f, LineAttributes.PATTERN_SOLID, false ) );

    Shape3D rshape = new Shape3D(rline, rapp);
    rtrans.addChild(rshape);
    
    Transform3D rt3d = new Transform3D();
    rt3d.rotX( -(Math.PI / 2.0) );
    rinterp =
      new RotationInterpolator( apanel.getAlpha(), rtrans, rt3d,
                                0.0f, (float)Math.PI * 2.0f );
    rinterp.setSchedulingBounds(bounds);
    root.addChild(rinterp);
    
    return root;
  }

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