36:        public BranchGroup createSceneGraph(){
37:                //create the root of our content scence graph
38:                BranchGroup objRoot = new BranchGroup();
39:                
40:                //create a transform group to rotate the cube
41:                //capability bits must be sit to allow changes
42:                //once the TransformGroup is part of a live scenegraph
43:                TransformGroup objRotate = new TransformGroup();
44:                objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
45:                objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
46:                
47:                //attach the transform group and then the cube
48:                objRoot.addChild(objRotate);
49:                objRotate.addChild(new ColorCube(0.4));
50:                
51:                //MouseRotate is a utilty class from Sun
52:                //a subclass of Behavior
53:                //this class references objRotate, so this is the Transform Group
54:                //that is affected when we use the mouse
55:                //MouseRotate changes the TransformGroup by a rotation
56:                //when we right click and drag the mouse
57:                //Notice that we must attach a Behavior class to the
58:                //scenegraph. This defines a position in space that is
59:                //used in conjunction with the scheduling bounds
60:                //to determine whether the Behavior is active.
61:                //The default constructor for BoundingSphere()
62:                //has radius 1.0 centered at the origin
63:                MouseRotate mR = new MouseRotate();
64:                mR.setTransformGroup(objRotate);
65:                mR.setSchedulingBounds(new BoundingSphere());
66:                objRoot.addChild(mR);
67:                
68:                //MouseZoom is a scaling activated by
69:                //middle clicking and dragging the mouse
70:                MouseZoom mZ = new MouseZoom();
71:                mZ.setTransformGroup(objRotate);
72:                mZ.setSchedulingBounds(new BoundingSphere());
73:                objRoot.addChild(mZ);
74:                
75:                objRoot.compile();
76:                
77:                return objRoot;
78:        }       //end of createSceneGraph method of Simple2