/// <summary>
/// In Meters!
/// </summary>
/// <param name="parent"></param>
/// <param name="myMass"></param>
/// <param name="parentMass"></param>
/// <param name="sgp_m"></param>
/// <param name="position_m"></param>
/// <param name="velocity_m"></param>
/// <param name="atDateTime"></param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public static OrbitDB FromVector(Entity parent, double myMass, double parentMass, double sgp_m, Vector3 position_m, Vector3 velocity_m, DateTime atDateTime)
{
if (position_m.Length() > OrbitProcessor.GetSOI_AU(parent))
{
throw new Exception("Entity not in target SOI");
}
//var sgp = GameConstants.Science.GravitationalConstant * (myMass + parentMass) / 3.347928976e33;
var ke = OrbitMath.KeplerFromPositionAndVelocity(sgp_m, position_m, velocity_m, atDateTime);
OrbitDB orbit = new OrbitDB(parent)
{
SemiMajorAxis = ke.SemiMajorAxis,
Eccentricity = ke.Eccentricity,
Inclination = ke.Inclination,
LongitudeOfAscendingNode = ke.LoAN,
ArgumentOfPeriapsis = ke.AoP,
MeanAnomalyAtEpoch = ke.MeanAnomalyAtEpoch,
Epoch = atDateTime,
_parentMass = parent.GetDataBlob <MassVolumeDB>().Mass,
_myMass = myMass
};
orbit.CalculateExtendedParameters();
var pos = OrbitProcessor.GetAbsolutePosition_m(orbit, atDateTime);
return(orbit);
}