package jhplot.math;

public class Mathfun {

    /** sqrt(a^2 + b^2) without under/overflow. * */

    public static double hypot(double a, double b) {
        double r;
        if (Math.abs(a) > Math.abs(b)) {
            r = b / a;
            r = Math.abs(a) * Math.sqrt(1 + r * r);
        } else if (b != 0) {
            r = a / b;
            r = Math.abs(b) * Math.sqrt(1 + r * r);
        } else {
            r = 0.0;
        }
        return r;
    }
}