/**
* @param lat1 lat1
* @param longt1 longt1
* @param lat2 lat2
* @param longt2 longt2
* @return distance of two points
* @throws Exception
*/
public static double distance(double lat1, double longt1, double lat2, double longt2)
throws Exception {
double x, y, distance;
x = (longt2 - longt1) * PI * R * Math.cos(((lat1 + lat2) / 2) * PI / 180) / 180;
y = (lat2 - lat1) * PI * R / 180;
distance = Math.hypot(x, y) / 1000;
return Double.valueOf(new DecimalFormat("0.00").format(distance));
}
/// @pre --
/// @post retorna l'angle que ha d'apuntar la NauEnemiga(e) per aconseguir que un RaigLaser
// disparat per e
/// col·lisioni amb n
private int angleApuntarMoviment(Nau n) {
double[] cn = n.obtenirCentreTriangle();
double[] ce = obtenirCentreTriangle();
double dist = Math.hypot(Math.abs(cn[0] - ce[0]), Math.abs(cn[1] - ce[1]));
double temps = dist / velocitatRaig_;
double[] previsio = preveurePosicio(n, temps);
double angle = angleApuntar(previsio);
return (int) angle;
}
private double Edist(Position A, Position B) {
return Math.hypot(A.getX() - B.getX(), A.getY() - B.getY());
}