/* 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.geometry.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.*;
import javax.media.j3d.*;
import javax.vecmath.*;

public class SimpleLOD extends Applet {

  public BranchGroup createSceneGraph(SimpleUniverse u) {
    BranchGroup objRoot = new BranchGroup();
    BoundingSphere bounds;
    bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    Vector3f ldir = new Vector3f(1.0F,1.0F,-1.0F);
    Color3f lcouldl = new Color3f(1.0F,1.0F,1.0F);
    DirectionalLight dl = new DirectionalLight(lcouldl,ldir);
    dl.setInfluencingBounds(bounds);
    objRoot.addChild(dl);
    Color3f lcoulal = new Color3f(0.3F,0.3F,0.1F);
    AmbientLight al = new AmbientLight(lcoulal);
    al.setInfluencingBounds(bounds);
    objRoot.addChild(al);
    TransformGroup objTrans = new TransformGroup();
    objRoot.addChild(objTrans);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
    { MouseZoom behavior = new MouseZoom(objTrans);
      objTrans.addChild(behavior);
      behavior.setSchedulingBounds(bounds); }
    { MouseRotate behavior = new MouseRotate(objTrans);
      objTrans.addChild(behavior);
      behavior.setSchedulingBounds(bounds); }
    Switch sw = new Switch();
    sw.setCapability(Switch.ALLOW_SWITCH_READ);
    sw.setCapability(Switch.ALLOW_SWITCH_WRITE);
    sw.setWhichChild(0);
    objTrans.addChild(sw);
    { Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.9f,0.8f,0.4f);
      m.setAmbientColor(0.6f,0.0f,0.6f);
      a.setMaterial(m);
      sw.addChild(new Box(0.25F,0.38F,0.58F,a)); }
    { Appearance a = new Appearance();
      Material m = new Material();
      a.setMaterial(m);
      sw.addChild(new Sphere(0.88F,1,100,a)); }
    { Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.1f,0.1f,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);
      sw.addChild(new Cylinder(1.5F,2.7F,1,100,100,a)); }
    { Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.5f,1.0f,0.2f);
      m.setAmbientColor(0.5f,0.6f,0.8f);
      a.setMaterial(m);
      sw.addChild(new Cone(2.55F,4.95F,1,100,100,a)); }
    float[] distances = new float[3];
    distances[0] = 3.0f;
    distances[1] = 6.0f;
    distances[2] = 9.0f;
    DistanceLOD lod = new DistanceLOD(distances);
    lod.addSwitch(sw);
    lod.setSchedulingBounds(bounds);
    objTrans.addChild(lod);
    objRoot.compile();
    return objRoot;
    }

  public SimpleLOD() {
    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 static void main(String[] args) {
    new MainFrame(new SimpleLOD(),250,250);
    }
  }