// Java 3D Test Applet
// TextureApplet.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 java.awt.image.*;
import java.text.*;
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.behaviors.mouse.MouseTranslate;
import com.sun.j3d.utils.behaviors.mouse.MouseZoom;
import com.sun.j3d.utils.image.TextureLoader;

public class TextureApplet extends Applet {
  private boolean isStandalone = false;

  public TextureApplet() {
    this(false);
  }
  
  public TextureApplet(boolean isStandalone) {
    this.isStandalone = isStandalone;

    this.setLayout(new BorderLayout());
    
  }

  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();
  
    BranchGroup scene = createSceneGraph();

    universe.addBranchGraph(scene);
  }

  private BranchGroup createSceneGraph() {
    BranchGroup root = new BranchGroup();

    Background bg = new Background(new Color3f(0.5f, 0.5f, 0.5f));
    bg.setApplicationBounds(new BoundingSphere(new Point3d(), 100.0));
    root.addChild(bg);
    
    TransformGroup trans = new TransformGroup();
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);

    BoundingSphere bounds = new BoundingSphere(new Point3d(), 100.0);
    
    MouseRotate rotator = new MouseRotate(trans);
    rotator.setSchedulingBounds(bounds);
    root.addChild(rotator);
    
    MouseTranslate translator = new MouseTranslate(trans);
    translator.setSchedulingBounds(bounds);
    root.addChild(translator);
    
    MouseZoom zoomer = new MouseZoom(trans);
    zoomer.setSchedulingBounds(bounds);
    root.addChild(zoomer);

    Point3d[] vertices = new Point3d[4];
    vertices[0] = new Point3d(-0.4, -0.4, 0.0); // 左下  3+-----+2
    vertices[1] = new Point3d( 0.4, -0.4, 0.0); // 右下   |     |
    vertices[2] = new Point3d( 0.4,  0.4, 0.0); // 右上   |     |
    vertices[3] = new Point3d(-0.4,  0.4, 0.0); // 左上  0+-----+1

    Point2f[] txcoords = new Point2f[4];
    txcoords[0] = new Point2f(-2.0f, -2.0f); // 左下  3+-----+2
    txcoords[1] = new Point2f( 2.0f, -2.0f); // 右下   |     | 
    txcoords[2] = new Point2f( 2.0f,  2.0f); // 右上   |     | 
    txcoords[3] = new Point2f(-2.0f,  2.0f); // 左上  0+-----+1

    QuadArray geom =
      new QuadArray( vertices.length,
		     GeometryArray.COORDINATES |
		     GeometryArray.TEXTURE_COORDINATE_2);
    geom.setCapability(Geometry.ALLOW_INTERSECT);
    geom.setCoordinates(0, vertices);
    geom.setTextureCoordinates(0, txcoords);

    Appearance ap = createAppearance();

    Shape3D grid = new Shape3D(geom, ap);
    grid.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
    trans.addChild(grid);

    root.addChild(trans);
    
    return root;
  }

  private Appearance createAppearance() {
    Appearance app = new Appearance();

    Image image = null;
    if (this.isStandalone) {
      // アプリケーションとして実行されている
      final Toolkit toolkit = Toolkit.getDefaultToolkit();
      image = toolkit.getImage("face.gif");
    } else {
      // アプレットとして実行されている
      image = getImage(getCodeBase(), "face.gif");
    }
    MediaTracker mt = new MediaTracker(this);
    mt.addImage(image, 0);
    mt.checkAll(true);
    try { mt.waitForID(0); } catch (InterruptedException e) { e.printStackTrace(); }

    Texture2D texture2d = (Texture2D)new TextureLoader(image, this).getTexture();

    app.setTexture(texture2d);
							      
    return app;
  }

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