float dimension = SECTION_LENGTH * numJoints * 2.3f;
Box floorBox = new Box(dimension, .5f, dimension);
Geometry floorGeometry = new Geometry("Floor", floorBox);
floorGeometry.setMaterial(material);
floorGeometry.setLocalTranslation(0, -1.0f * HEAD_RADIUS - .5f, 0);
floorGeometry.addControl(new RigidBodyControl(0));
localRootNode.attachChild(floorGeometry);
pivots = new Node[numJoints];
sections = new Geometry[numJoints];
joints = new Geometry[numJoints];