def fromOrbitalElements(a, b, e, i, long_asc, arg_per, M, true_lon,
arg_lat, lon_per, p, mu):
"""
a: semi major axis (km)
b: semi minor axis (km)
e: eccentricity (unitless)
i: inclination (radians)
long_asc: Right ascention of the ascending node (radians)
arg_per: argument of perigee (radians)
M: mean anomaly (radians)
true_lon: True Longtitude (radians)
arg_lat: argument of latitude (radians)
long_per: Longtitude of periapse (radians)
p: semilatus rectum (km)
mu: gravitational constant
"""
hval = b * sqrt(mu / a)
h_vec1 = Vector3.Z().rotate(Rotation.aroundY(i))
h_vec = h_vec1.rotate(Rotation.aroundZ(long_asc - pi / 2.0))
x = Vector3.X()
rot_long_asc = Rotation.aroundZ(long_asc)
n_dir = x.rotate(rot_long_asc).norm()
n_vec = Vector3.Z().cross(h_vec)
KeplerOrbit2(a, b, e, i, long_asc, arg_per, M, true_lon, arg_lat,
lon_per, p, mu, n_vec, h_vec)
def fromOrbitalElements(a, b, e, i, long_asc, arg_per, M, true_lon, arg_lat, lon_per, p, mu):
"""
a: semi major axis (km)
b: semi minor axis (km)
e: eccentricity (unitless)
i: inclination (radians)
long_asc: Right ascention of the ascending node (radians)
arg_per: argument of perigee (radians)
M: mean anomaly (radians)
true_lon: True Longtitude (radians)
arg_lat: argument of latitude (radians)
long_per: Longtitude of periapse (radians)
p: semilatus rectum (km)
mu: gravitational constant
"""
hval = b*sqrt(mu/a)
h_vec1 = Vector3.Z().rotate(Rotation.aroundY(i))
h_vec = h_vec1.rotate(Rotation.aroundZ(long_asc - pi/2.0))
x = Vector3.X()
rot_long_asc = Rotation.aroundZ(long_asc)
n_dir = x.rotate(rot_long_asc).norm()
n_vec = Vector3.Z().cross(h_vec)
KeplerOrbit2(
a,
b,
e,
i,
long_asc,
arg_per,
M,
true_lon,
arg_lat,
lon_per,
p,
mu,
n_vec,
h_vec)
