public Point2D getCoord2D(double t) {
		Point2D pt = new Point2D();
		getCoord2D(t, pt);
		return pt;
	}
public Point2D getCoord2D ( double t ) { Point2D pt = new Point2D ( ) ; getCoord2D ( t , pt ) ; return pt ; }
Returns the coordinate of the point on this segment for the given
parameter value.