Is angle in between two angles

Question

I have 3 angles a b c

a=315 b=20 c=45

ok so would like to know giving all three if b is in between a and c

i have the long way of doing this adding a

Answer 1

I had a similar problem. I got it. All the calculations are in degrees. I needed to calculate id a gps location is inside a rectangle.

Or, I needed to see if an angle x is between angle check+r and angle check-r.

check-r.

If you need a, find the angle check in the middle of a and b and then the distance (r) of check from a or b.

The method normalize, changes the angles from -infinity...infinity to -180...180. The method check, takes the arguments x: the angle that we need to see if it is between the angles check-r and check+r. check: the angle to check with. r: the radius around angle check.

private static double normalize(double x) {
        x = x % 360;
        if (x>=180) {
            return x-360;
        }
        if (x<-180) {
            return x+360;
        }
        return x;
}
public static boolean check(double x, double check, double r) {
        x = x - check;
        x = normalize(x);
        return x-r;
}