public class PointyPoint {
	public Vector3D pt,v;
	public PointyPoint(Vector3D ptt,Vector3D vv) {
		pt = ptt;
		v = vv;
	}
	public PointyPoint(Vector3D ptt) {
		this(ptt,new Vector3D(0,0,0));
	}
	public PointyPoint() {
		this(new Vector3D(0,0.,.0));
	}
}