package interpretacja;

public class Geom {
	public static double kat(int[] u, int[] v) {
		double p = Math.atan2(v[1] - u[1], v[0] - u[0]) * 180 / Math.PI;
		if (p < 0) {
			p += 360;
		}
		return p;
	}
	
	public static double len(int[] u, int[] v) {
		double dx = u[0] - v[0];
		double dy = u[1] - v[1];
		return Math.sqrt(dx * dx + dy * dy);
	}
	
	public static double greater(double a1, double a2) {
		if (a1 < a2) {
			return 360 + a1 - a2;
		} else {
			return a1 - a2;
		}
	}
	
	public static double delta(double a1, double a2) {
		while (a1 >= 360) {
			a1 = a1 - 360;
		}
		while (a2 >= 360) {
			a2 = a2 - 360;
		}
		double min = Math.min(a1, a2);
		double max = Math.max(a1, a2);
		
		double d1 = max - min;
		double d2 = 360 + min - max;
		return Math.min(d1, d2);
	}
}