public void OnComponentInstallation(Entity parentEntity, ComponentInstance componentInstance)
{
NewtonThrustAbilityDB db;
if (!parentEntity.HasDataBlob <NewtonThrustAbilityDB>())
{
db = new NewtonThrustAbilityDB(FuelType);
parentEntity.SetDataBlob(db);
}
else
{
db = parentEntity.GetDataBlob <NewtonThrustAbilityDB>();
if (db.FuelType != FuelType)
{
throw new Exception("prime entity can only have thrusters which use the same fuel type");
}
//todo: fix so we can use different fuel types on the prime entity.
}
//db.ThrustInNewtons += ThrustInNewtons;
db.ExhaustVelocity = ExhaustVelocity;
db.FuelBurnRate += FuelBurnRate;
db.ThrustInNewtons += ExhaustVelocity * FuelBurnRate;
/*
* var wetmass = parentEntity.GetDataBlob<MassVolumeDB>().Mass;
* ProcessedMaterialSD foo = StaticRefLib.StaticData.CargoGoods.GetMaterials()[FuelType];
* var cargo = parentEntity.GetDataBlob<CargoStorageDB>();
* var fuelAmount = StorageSpaceProcessor.GetAmount(cargo, foo);
* var dryMass = wetmass - fuelAmount;
* db.DeltaV = OrbitMath.TsiolkovskyRocketEquation(wetmass, dryMass, ExhaustVelocity);
*/
}
public NewtonThrustAbilityDB(NewtonThrustAbilityDB db)
{
ThrustInNewtons = db.ThrustInNewtons;
ExhaustVelocity = db.ExhaustVelocity;
FuelType = db.FuelType;
FuelBurnRate = db.FuelBurnRate;
DeltaV = db.DeltaV;
}
public static (Vector3 pos, Vector3 vel) GetAbsulutePositon_m(Entity entity, NewtonMoveDB newtonMoveDB, DateTime atDateTime)
{
PositionDB positionDB = entity.GetDataBlob <PositionDB>();
NewtonThrustAbilityDB newtonThrust = entity.GetDataBlob <NewtonThrustAbilityDB>();
DateTime dateTimeNow = entity.StarSysDateTime;
TimeSpan timeDelta = atDateTime - dateTimeNow;
double mass_Kg = entity.GetDataBlob <MassVolumeDB>().Mass;
double parentMass_kg = newtonMoveDB.ParentMass;
Vector3 newAbsolute = positionDB.AbsolutePosition_m;
Vector3 velocity = newtonMoveDB.CurrentVector_ms;
double secondsToItterate = timeDelta.TotalSeconds;
while (secondsToItterate > 0)
{
//double timeStep = Math.Max(secondsToItterate / speed_kms, 1);
//timeStep = Math.Min(timeStep, secondsToItterate);
double timeStep = 1;//because the above seems unstable and looses energy.
double distanceToParent_m = positionDB.GetDistanceTo_m(newtonMoveDB.SOIParent.GetDataBlob <PositionDB>());
distanceToParent_m = Math.Max(distanceToParent_m, 0.1); //don't let the distance be 0 (once collision is in this will likely never happen anyway)
double gravForce = GameConstants.Science.GravitationalConstant * (mass_Kg * parentMass_kg / Math.Pow(distanceToParent_m, 2));
Vector3 gravForceVector = gravForce * -Vector3.Normalise(positionDB.RelativePosition_m);
Vector3 acceleratonFromGrav = gravForceVector / mass_Kg;
double maxAccelFromThrust1 = newtonThrust.ExhaustVelocity * Math.Log(mass_Kg / (mass_Kg - newtonThrust.FuelBurnRate)); //per second
double maxAccelFromThrust = newtonThrust.ThrustInNewtons / mass_Kg; //per second
Vector3 accelerationFromThrust = newtonMoveDB.DeltaVForManuver_AU / maxAccelFromThrust; //per second
Vector3 accelerationTotal = acceleratonFromGrav + accelerationFromThrust;
Vector3 newVelocity = (accelerationTotal * timeStep) + velocity;
velocity = newVelocity;
Vector3 deltaPos = (velocity + newVelocity) / 2 * timeStep;
newAbsolute += deltaPos;
secondsToItterate -= timeStep;
}
return(newAbsolute, velocity);
}
/// <summary>
/// This was designed so that fast moving objects will get interpolated a lot more than slow moving objects
/// so fast moving objects shouldn't loose positional acuracy when close to a planet,
/// and slow moving objects won't have processor time wasted on them by calulcating too often.
/// However this seems to be unstable and looses energy, unsure why. currently set it to just itterate/interpolate every second.
/// so currently will be using more time to get through this than neccisary.
/// </summary>
/// <param name="entity">Entity.</param>
/// <param name="deltaSeconds">Delta seconds.</param>
public static void NewtonMove(Entity entity, int deltaSeconds)
{
NewtonMoveDB newtonMoveDB = entity.GetDataBlob <NewtonMoveDB>();
NewtonThrustAbilityDB newtonThrust = entity.GetDataBlob <NewtonThrustAbilityDB>();
PositionDB positionDB = entity.GetDataBlob <PositionDB>();
double mass_Kg = entity.GetDataBlob <MassVolumeDB>().Mass;
double parentMass_kg = newtonMoveDB.ParentMass;
var manager = entity.Manager;
DateTime dateTimeFrom = newtonMoveDB.LastProcessDateTime;
DateTime dateTimeNow = manager.ManagerSubpulses.StarSysDateTime;
DateTime dateTimeFuture = dateTimeNow + TimeSpan.FromSeconds(deltaSeconds);
double deltaT = (dateTimeFuture - dateTimeFrom).TotalSeconds;
double secondsToItterate = deltaT;
while (secondsToItterate > 0)
{
//double timeStep = Math.Max(secondsToItterate / speed_kms, 1);
//timeStep = Math.Min(timeStep, secondsToItterate);
double timeStepInSeconds = 1;//because the above seems unstable and looses energy.
double distanceToParent_m = positionDB.GetDistanceTo_m(newtonMoveDB.SOIParent.GetDataBlob <PositionDB>());
distanceToParent_m = Math.Max(distanceToParent_m, 0.1); //don't let the distance be 0 (once collision is in this will likely never happen anyway)
double gravForce = GameConstants.Science.GravitationalConstant * (mass_Kg * parentMass_kg / Math.Pow(distanceToParent_m, 2));
Vector3 gravForceVector = gravForce * -Vector3.Normalise(positionDB.RelativePosition_m);
Vector3 totalDVFromGrav = (gravForceVector / mass_Kg) * timeStepInSeconds;
double maxAccelFromThrust1 = newtonThrust.ExhaustVelocity * Math.Log(mass_Kg / (mass_Kg - newtonThrust.FuelBurnRate)); //per second
double maxAccelFromThrust = newtonThrust.ThrustInNewtons / mass_Kg; //per second
Vector3 manuverDV = newtonMoveDB.DeltaVForManuver_m; //how much dv needed to complete the manuver.
double dryMass = mass_Kg - newtonThrust.FuelBurnRate * timeStepInSeconds; //how much our ship weighs after a timestep of fuel is used.
//how much dv can we get in this timestep.
double deltaVThisStep = OrbitMath.TsiolkovskyRocketEquation(mass_Kg, dryMass, newtonThrust.ExhaustVelocity);
deltaVThisStep = Math.Min(manuverDV.Length(), deltaVThisStep); //don't use more Dv than what is called for.
deltaVThisStep = Math.Min(newtonThrust.DeltaV, deltaVThisStep); //check we've got the deltaV to spend.
Vector3 totalDVFromThrust = Vector3.Normalise(manuverDV) * deltaVThisStep;
//remove the deltaV we're expending from the max (TODO: Remove fuel from cargo, change mass of ship)
newtonThrust.DeltaV -= deltaVThisStep;
//remove the vectorDV from the amount needed to fully complete the manuver.
newtonMoveDB.DeltaVForManuver_m -= totalDVFromThrust;
Vector3 totalDV = totalDVFromGrav + totalDVFromThrust;
Vector3 newVelocity = totalDV + newtonMoveDB.CurrentVector_ms;
newtonMoveDB.CurrentVector_ms = newVelocity;
Vector3 deltaPos = (newtonMoveDB.CurrentVector_ms + newVelocity) / 2 * timeStepInSeconds;
positionDB.RelativePosition_m += deltaPos;
double sOIRadius = OrbitProcessor.GetSOI_m(newtonMoveDB.SOIParent);
if (positionDB.RelativePosition_m.Length() >= sOIRadius)
{
Entity newParent;
Vector3 parentRalitiveVector;
//if our parent is a regular kepler object (normaly this is the case)
if (newtonMoveDB.SOIParent.HasDataBlob <OrbitDB>())
{
var orbitDB = newtonMoveDB.SOIParent.GetDataBlob <OrbitDB>();
newParent = orbitDB.Parent;
var parentVelocity = OrbitProcessor.InstantaneousOrbitalVelocityVector_m(orbitDB, entity.StarSysDateTime);
parentRalitiveVector = newtonMoveDB.CurrentVector_ms + parentVelocity;
}
else //if (newtonMoveDB.SOIParent.HasDataBlob<NewtonMoveDB>())
{ //this will pretty much never happen.
newParent = newtonMoveDB.SOIParent.GetDataBlob <NewtonMoveDB>().SOIParent;
var parentVelocity = newtonMoveDB.SOIParent.GetDataBlob <NewtonMoveDB>().CurrentVector_ms;
parentRalitiveVector = newtonMoveDB.CurrentVector_ms + parentVelocity;
}
parentMass_kg = newParent.GetDataBlob <MassVolumeDB>().Mass;
Vector3 posRalitiveToNewParent = positionDB.AbsolutePosition_m - newParent.GetDataBlob <PositionDB>().AbsolutePosition_m;
var dateTime = dateTimeNow + TimeSpan.FromSeconds(deltaSeconds - secondsToItterate);
double sgp = GMath.StandardGravitationalParameter(parentMass_kg + mass_Kg);
var kE = OrbitMath.KeplerFromPositionAndVelocity(sgp, posRalitiveToNewParent, parentRalitiveVector, dateTime);
positionDB.SetParent(newParent);
newtonMoveDB.ParentMass = parentMass_kg;
newtonMoveDB.SOIParent = newParent;
newtonMoveDB.CurrentVector_ms = parentRalitiveVector;
}
if (newtonMoveDB.DeltaVForManuver_m.Length() <= 0) //if we've completed the manuver.
{
var dateTime = dateTimeNow + TimeSpan.FromSeconds(deltaSeconds - secondsToItterate);
double sgp = GMath.StandardGravitationalParameter(parentMass_kg + mass_Kg);
KeplerElements kE = OrbitMath.KeplerFromPositionAndVelocity(sgp, positionDB.RelativePosition_m, newtonMoveDB.CurrentVector_ms, dateTime);
var parentEntity = Entity.GetSOIParentEntity(entity, positionDB);
if (kE.Eccentricity < 1) //if we're going to end up in a regular orbit around our new parent
{
var newOrbit = OrbitDB.FromKeplerElements(
parentEntity,
mass_Kg,
kE,
dateTime);
entity.RemoveDataBlob <NewtonMoveDB>();
entity.SetDataBlob(newOrbit);
positionDB.SetParent(parentEntity);
var newPos = OrbitProcessor.GetPosition_m(newOrbit, dateTime);
positionDB.RelativePosition_m = newPos;
}
break;
}
secondsToItterate -= timeStepInSeconds;
}
newtonMoveDB.LastProcessDateTime = dateTimeFuture;
}
internal override void ActionCommand(DateTime atDateTime)
{
if (atDateTime < ActionOnDate)
{
return;
}
if (!IsRunning)
{
IsRunning = true;
_newtonAbilityDB = _entityCommanding.GetDataBlob <NewtonThrustAbilityDB>();
_startDV = _newtonAbilityDB.DeltaV;
_fuelBurnRate = _newtonAbilityDB.FuelBurnRate;
_totalFuel = _newtonAbilityDB.TotalFuel_kg;
var soiParentEntity = Entity.GetSOIParentEntity(_entityCommanding);
_soiParentMass = soiParentEntity.GetDataBlob <MassVolumeDB>().MassDry;
var currentVel = Entity.GetRalitiveFutureVelocity(_entityCommanding, atDateTime);
if (_entityCommanding.HasDataBlob <OrbitDB>())
{
_entityCommanding.RemoveDataBlob <OrbitDB>();
}
if (_entityCommanding.HasDataBlob <OrbitUpdateOftenDB>())
{
_entityCommanding.RemoveDataBlob <OrbitUpdateOftenDB>();
}
if (_entityCommanding.HasDataBlob <NewtonMoveDB>())
{
_newtonMovedb = _entityCommanding.GetDataBlob <NewtonMoveDB>();
}
else
{
_newtonMovedb = new NewtonMoveDB(soiParentEntity, currentVel);
}
_entityCommanding.SetDataBlob(_newtonMovedb);
}
var halfDV = _startDV * 0.5; //lets burn half the dv getting into a good intercept.
var dvUsed = _startDV - _newtonAbilityDB.DeltaV;
var dvToUse = halfDV - dvUsed;
if (dvToUse > 0)
{
(Vector3 Position, Vector3 Velocity)curOurRalState = Entity.GetRalitiveState(_entityCommanding);
(Vector3 Position, Vector3 Velocity)curTgtRalState = Entity.GetRalitiveState(_targetEntity);
var dvRemaining = _newtonAbilityDB.DeltaV;
var tgtVelocity = Entity.GetAbsoluteFutureVelocity(_targetEntity, atDateTime);
//calculate the differencecs in velocity vectors.
Vector3 leadToTgt = (curTgtRalState.Velocity - curOurRalState.Velocity);
//convert the lead to an orbit ralitive (prograde Y) vector.
//var manuverVector = OrbitMath.GlobalToOrbitVector(leadToTgt, curOurRalState.Position, curOurRalState.Velocity);
var burnRate = _newtonAbilityDB.FuelBurnRate;
//var foo = OrbitMath.TsiolkovskyFuelUse(_totalFuel, )
var fuelUse = OrbitMath.TsiolkovskyFuelCost(
_newtonAbilityDB.TotalFuel_kg,
_newtonAbilityDB.ExhaustVelocity,
dvToUse//pretty sure this should be dvToUse, but that's giving me a silent crash.
);
var burnTime = fuelUse / burnRate;
var manuverVector = ManuverVector(dvToUse, burnTime, curOurRalState, curTgtRalState, atDateTime);
_newtonMovedb.DeltaVForManuver_FoRO_m = manuverVector;
_entityCommanding.Manager.ManagerSubpulses.AddEntityInterupt(atDateTime + TimeSpan.FromSeconds(5), nameof(OrderableProcessor), _entityCommanding);
}
else
{
_newtonMovedb.DeltaVForManuver_FoRO_m = new Vector3();
}
}