/* 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 javax.media.j3d.*;
import javax.vecmath.*;

public class SimpleCollision extends Applet {

  private Group createBox() {
    TransformGroup objTrans = new TransformGroup();
    Appearance a = new Appearance();
    Box shape = new Box(0.15f,0.1f,0.08f,Primitive.GENERATE_NORMALS,a);
    objTrans.addChild(shape);
    Material m = new Material();
    m.setCapability(Material.ALLOW_COMPONENT_WRITE);
    m.setDiffuseColor(0.7f,0.6f,0.1f);    
    a.setCapability(a.ALLOW_MATERIAL_WRITE);
    a.setMaterial(m);
    CollisionDetector cd = new CollisionDetector(shape);
    BoundingSphere bounds;
    bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    cd.setSchedulingBounds(bounds);
    objTrans.addChild(cd);
    return objTrans;
    }

  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);
    { TransformGroup ot = new TransformGroup();
      Transform3D t = new Transform3D();
      t.setTranslation(new Vector3f(0.3F,0.0F,0.0F));
      Transform3D tt = new Transform3D();
      tt.setRotation(new AxisAngle4f(1.0F,0.0F,0.0F,(float) Math.PI/2.0f));
      t.mul(tt);
      ot.setTransform(t);
      TransformGroup ot1 = new TransformGroup();
      ot1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D tra1 = new Transform3D();
      Alpha ra1 = new Alpha(-1,Alpha.INCREASING_ENABLE,
                            0,0,
                            5000,0,0,
                            0,0,0);
      RotationInterpolator r1;
      r1 = new RotationInterpolator(ra1,
                                    ot1,
                                    tra1,
                                    0.0f,
                                    (float) Math.PI*2.0f);
      r1.setSchedulingBounds(bounds);
      TransformGroup ot2 = new TransformGroup();
      Transform3D t2 = new Transform3D();
      t2.setTranslation(new Vector3f(0.3F,0.0F,0.0F));
      ot2.setTransform(t2);
      TransformGroup ot3 = new TransformGroup();
      ot3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D tra3 = new Transform3D();
      Alpha ra3 = new Alpha(-1,Alpha.INCREASING_ENABLE,
                            0,0,
                            2000,0,0,
                            0,0,0);
      RotationInterpolator r3;
      r3 = new RotationInterpolator(ra3,
                                    ot3,
                                    tra3,
                                    0.0f,
                                    (float) Math.PI*2.0f);
      r3.setSchedulingBounds(bounds);
      Transform3D ttt = new Transform3D();
      ttt.setRotation(new AxisAngle4f(1.0F,1.0F,1.0F,(float) Math.PI/2.0f));
      TransformGroup ot4 = new TransformGroup();
      ot4.setTransform(ttt);
      objRoot.addChild(ot);
      ot.addChild(ot1);
      ot1.addChild(ot2);
      ot1.addChild(r1);
      ot2.addChild(ot4);
      ot4.addChild(r3);
      ot4.addChild(ot3);
        Group box = createBox();
      ot3.addChild(box); }
    { TransformGroup ot = new TransformGroup();
      Transform3D t = new Transform3D();
      t.setTranslation(new Vector3f(-0.3F,0.0F,0.0F));
      Transform3D tt = new Transform3D();
      tt.setRotation(new AxisAngle4f(1.0F,0.0F,0.0F,(float) Math.PI/2.0f));
      t.mul(tt);
      ot.setTransform(t);
      TransformGroup ot1 = new TransformGroup();
      ot1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D tra1 = new Transform3D();
      Alpha ra1 = new Alpha(-1,Alpha.DECREASING_ENABLE,
                            0,0,
                            0,0,0,
                            3900,0,0);
      RotationInterpolator r1;
      r1 = new RotationInterpolator(ra1,
                                    ot1,
                                    tra1,
                                    0.0f,
                                    (float) Math.PI*2.0f);
      r1.setSchedulingBounds(bounds);
      TransformGroup ot2 = new TransformGroup();
      Transform3D t2 = new Transform3D();
      t2.setTranslation(new Vector3f(0.3F,0.0F,0.0F));
      ot2.setTransform(t2);
      TransformGroup ot3 = new TransformGroup();
      ot3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D tra3 = new Transform3D();
      Alpha ra3 = new Alpha(-1,Alpha.INCREASING_ENABLE,
                            0,0,
                            1100,0,0,
                            0,0,0);
      RotationInterpolator r3;
      r3 = new RotationInterpolator(ra3,
                                    ot3,
                                    tra3,
                                    0.0f,
                                    (float) Math.PI*2.0f);
      r3.setSchedulingBounds(bounds);
      Transform3D ttt = new Transform3D();
      ttt.setRotation(new AxisAngle4f(1.0F,1.0F,1.0F,(float) Math.PI/2.0f));
      TransformGroup ot4 = new TransformGroup();
      ot4.setTransform(ttt);
      objRoot.addChild(ot);
      ot.addChild(ot1);
      ot1.addChild(ot2);
      ot1.addChild(r1);
      ot2.addChild(ot4);
      ot4.addChild(r3);
      ot4.addChild(ot3);
        Group box = createBox();
      ot3.addChild(box); }
    return objRoot;
    }

  public SimpleCollision() {
    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 SimpleCollision(),450,250);
    }
  }