import java.applet.*;
import java.awt.*;
import javax.media.j3d.*;

public class First3D extends Applet {
         public BranchGroup createSceneGraph() {
             // Create the root of the branch graph

             BranchGroup objRoot = new BranchGroup();

             // Create the TransformGroup node and initialize it to the
             // identity. Enable the TRANSFORM_WRITE capability so that
             // our behavior code can modify it at run time. Add it to
             // the root of the subgraph.

             TransformGroup objTrans = new TransformGroup();
             objTrans.setCapability(
                                 TransformGroup.ALLOW_TRANSFORM_WRITE);
             objRoot.addChild(objTrans);

             // Create a simple Shape3D node; add it to the scene graph.

             objTrans.addChild(new ColorCube(0.4));

             // Create a new Behavior object that will perform the
             // desired operation on the specified transform and add
             // it into the scene graph.

             Transform3D yAxis = new Transform3D();
             Alpha rotationAlpha = new Alpha(-1, 4000);
             RotationInterpolator rotator = new RotationInterpolator(
                     rotationAlpha, objTrans, yAxis,
                     0.0f, (float) Math.PI*2.0f);
             BoundingSphere bounds =
                 new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
             rotator.setSchedulingBounds(bounds);
             objRoot.addChild(rotator);

             // Have Java 3D perform optimizations on this scene graph.
             objRoot.compile();

             return objRoot;
         }

         public First3D() {
            add(new Canvas3d());   
          //<set layout of applet, construct canvas3d, add canvas3d>

             // Create the scene; attach it to the virtual universe

             BranchGroup scene = createSceneGraph();
             SimpleUniverse u = new SimpleUniverse(canvas3d);
             u.getViewingPlatform().setNominalViewingTransform();
             u.addBranchGraph(scene);
         }
     }