public static double getFlatness(double x1, double y1, double cx, double cy, double x2, double y2) { return Math.sqrt(getFlatnessSq(x1, y1, cx, cy, x2, y2));
public static double getFlatness(double x1, double y1, double cx, double cy, double x2, double y2) { return Line2D.ptSegDist(x1, y1, x2, y2, cx, cy);
	public static double getFlatness(double x1, double y1, double cx, double cy, double x2, double y2) {		return Math.sqrt(getFlatnessSq(x1, y1, cx, cy, x2, y2));	}