/// <summary>
/// Updates the constants.
/// </summary>
protected override void UpdateConstants()
{
base.UpdateConstants();
k_0 = ScaleFactor;
a = EllipsoidType.A();
e2 = EllipsoidType.E2();
e4 = e2 * e2;
e6 = e4 * e2;
ep2 = EllipsoidType.Ep2();
e_1 = (1 - Math.Sqrt(1 - e2)) / (1 + Math.Sqrt(1 - e2));
e2_1 = e_1 * e_1;
e3_1 = e2_1 * e_1;
e4_1 = e3_1 * e_1;
lambda_0 = MathUtil.Radians(CentralMeridian);
phi_0 = MathUtil.Radians(LatitudeOrigin);
M_0 = a * ((1 - e2 / 4 - 3 * e4 / 64 - 5 * e6 / 256 /* - ... */) * phi_0 - (3 * e2 / 8 + 3 * e4 / 32 + 45 * e6 / 1024 /* + ... */) * Math.Sin(2 * phi_0) + (15 * e4 / 256 + 45 * e6 / 1024 /* + ... */) * Math.Sin(4 * phi_0) - (35 * e6 / 3072 /* + ... */) * Math.Sin(6 * phi_0) /* + ... */);
}
