public void Calc(float xc, float yc, float xp, float yp, float r)
{
float distance = 0f, x = 0f, y = 0f, r1, r2, r3, c;
float R = 6378.137f;
r1 = xc * Mathf.Deg2Rad;
r2 = xp * Mathf.Deg2Rad;
x = (xp - xc) * Mathf.Deg2Rad;
y = (yp - yc) * Mathf.Deg2Rad;
r3 = Mathf.Sin(x / 2) * Mathf.Sin(x / 2) + Mathf.Cos(r1) * Mathf.Cos(r2) * Mathf.Sin(y / 2) * Mathf.Sin(y / 2);
c = 2 * Mathf.Atan2(Mathf.Sqrt(r3), Mathf.Sqrt(1 - r3));
distance = Mathf.RoundToInt(R * c * 1000f);
Distance.text = " Distance: " + distance + " m";
if (distance <= r)
{
range.text = "In range";
Model.SetActive(true);
Model2.SetActive(true);
}
else
{
range.text = "Not In range";
Model.SetActive(false);
Model2.SetActive(false);
}
}