List<Double> radius = new ArrayList<Double>();
List<Vector3d> tangents = new ArrayList<Vector3d>();
vertices.add(new Point3d(-length*0.5, 0.0, 0.0));
List<Double> radius = new ArrayList<Double>();
List<Vector3d> tangents = new ArrayList<Vector3d>();
vertices.add(new Point3d(-length*0.5, 0.0, 0.0));