private Vector getVectorForPoints(Location l1, Location l2) {
            double g = -0.08;
            double d = l2.distance(l1);
            double t = d;
            double vX = (1.0+0.07*t) * (l2.getX() - l1.getX())/t;
            double vY = (1.0+0.03*t) * (l2.getY() - l1.getY())/t - 0.5*g*t;
            double vZ = (1.0+0.07*t) * (l2.getZ() - l1.getZ())/t;
            return new Vector(vX, vY, vZ);
    }