public static double GetAngleToRetrograde(this Orbit orbit, double universalTime)
{
if (orbit.referenceBody == CelestialBodies.SystemBody.CelestialBody)
{
return(0.0);
}
Vector3d orbitVector = orbit.getRelativePositionAtUT(universalTime);
orbitVector.z = 0.0;
Vector3d bodyVector = orbit.referenceBody.orbit.getOrbitalVelocityAtUT(universalTime);
bodyVector.z = 0.0;
double angle = AngleHelper.GetAngleBetweenVectors(-bodyVector, orbitVector);
return(AngleHelper.Clamp360(orbit.inclination < 90.0 ? angle : 360.0 - angle));
}
public static double GetPhaseAngle(this Orbit orbit, Orbit target)
{
var angle = AngleHelper.GetAngleBetweenVectors(Vector3d.Exclude(orbit.GetOrbitNormal(), target.pos), orbit.pos);
return((orbit.semiMajorAxis < target.semiMajorAxis) ? angle : angle - 360.0);
}
