/* Auteur: Nicolas JANEY         */
/* nicolas.janey@univ-fcomte.fr  */
/* Novembre 2001                 */

import java.applet.Applet;
import java.awt.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.image.TextureLoader;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.net.*;

public class SimpleTransparency extends Applet {

  static boolean applet = true ;
  private String base ;

  private Texture chercheTexture(String s) {
    if ( applet ) {
      try {
        String adresse = base+s ;
        URL u1 = new URL(adresse);
        return(new TextureLoader(u1,this).getTexture()) ; }
      catch (MalformedURLException e) { return(new Texture2D());} }
      else
      return(new TextureLoader(s,this).getTexture());
    }

  public BranchGroup createSceneGraph(SimpleUniverse u) {
    BranchGroup objRoot = new BranchGroup();
    BoundingSphere largeBounds;
    largeBounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    { Vector3f ldir = new Vector3f(1.0F,1.0F,-2.0F);
      Color3f lcouldl = new Color3f(1.0F,1.0F,1.0F);
      DirectionalLight dl = new DirectionalLight(lcouldl,ldir);
      dl.setInfluencingBounds(largeBounds);
      objRoot.addChild(dl); }
    { Color3f lcoulal = new Color3f(0.3F,0.3F,0.1F);
      AmbientLight al = new AmbientLight(lcoulal);
      al.setInfluencingBounds(largeBounds);
      objRoot.addChild(al); }
    { TransformGroup objTrans = new TransformGroup();
      objRoot.addChild(objTrans);
      Transform3D t3D = new Transform3D();
      t3D.setTranslation(new Vector3d(0.0,0.0,-5.0)) ;
      objTrans.setTransform(t3D);
      Appearance a = new Appearance();
      Texture t = chercheTexture("Bois.jpg");
      a.setTexture(t);
      objTrans.addChild(new Box(3.0F,3.0F,0.1F,Box.GENERATE_TEXTURE_COORDS,a)); }
    { TransformGroup objTrans1 = new TransformGroup();
      objRoot.addChild(objTrans1);
      objTrans1.setCapability(
        TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D yAxis = new Transform3D();
      Alpha rotationAlpha;
      rotationAlpha = new Alpha(-1,
                        Alpha.INCREASING_ENABLE,
                        0,0,
                        4000,0,0,
                        0,0,0);
      RotationInterpolator rotator;
      rotator = new RotationInterpolator(
                  rotationAlpha,
                  objTrans1,yAxis,
                  0.0f,
                  (float) Math.PI*2.0f);
      rotator.setSchedulingBounds(largeBounds);
      objTrans1.addChild(rotator);
      Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.1f,0.9f,0.9f);
      m.setSpecularColor(1.0f,0.0f,0.0f);
      m.setAmbientColor(0.9f,0.9f,0.9f);
      m.setShininess(25.0f);
      a.setMaterial(m);
      TransparencyAttributes ta = new TransparencyAttributes(TransparencyAttributes.NICEST,0.7F);
      a.setTransparencyAttributes(ta);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans1.addChild(objTrans2);
      Transform3D t3D = new Transform3D();
      t3D.setRotation(new AxisAngle4d(1.0,1.0,0.0,Math.PI/5.0)) ;
      objTrans2.setTransform(t3D);
      objTrans2.addChild(new Cylinder(0.5F,1.0F,1,50,50,a)); }
    objRoot.compile();
    return objRoot;
    }

  public void lanceJava3D() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config;
    config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D c = new Canvas3D(config);
    add("Center",c);
    SimpleUniverse u = new SimpleUniverse(c);
    BranchGroup scene = createSceneGraph(u);
    u.getViewingPlatform().setNominalViewingTransform();
    u.addBranchGraph(scene);
    }

  public void init() {
    if ( applet ) {
      URL url = this.getCodeBase();
      base = url.toString();
      lanceJava3D(); }
    }

  public SimpleTransparency() {
    if ( !applet ) {
      lanceJava3D(); }
    }

  public static void main(String[] args) {
    applet = false ;
    new MainFrame(new SimpleTransparency(),300,250);
    }
  }