public static void StartNonNewtTranslation(Entity entity) { var moveDB = entity.GetDataBlob <TranslateMoveDB>(); var propulsionDB = entity.GetDataBlob <PropulsionAbilityDB>(); var positionDB = entity.GetDataBlob <PositionDB>(); var maxSpeedMS = propulsionDB.MaximumSpeed_MS; positionDB.SetParent(null); Vector3 targetPosMt = Distance.AuToMt(moveDB.TranslateExitPoint_AU); Vector3 currentPositionMt = Distance.AuToMt(positionDB.AbsolutePosition_AU); Vector3 postionDelta = currentPositionMt - targetPosMt; double totalDistance = postionDelta.Length(); double maxKMeters = ShipMovementProcessor.CalcMaxFuelDistance_KM(entity); double fuelMaxDistanceMt = maxKMeters * 1000; if (fuelMaxDistanceMt >= totalDistance) { var currentVelocityMS = Vector3.Normalise(targetPosMt - currentPositionMt) * maxSpeedMS; propulsionDB.CurrentVectorMS = currentVelocityMS; moveDB.CurrentNonNewtonionVectorMS = currentVelocityMS; moveDB.LastProcessDateTime = entity.Manager.ManagerSubpulses.StarSysDateTime; CargoStorageDB storedResources = entity.GetDataBlob <CargoStorageDB>(); foreach (var item in propulsionDB.FuelUsePerKM) { var fuel = staticData.GetICargoable(item.Key); StorageSpaceProcessor.RemoveCargo(storedResources, fuel, (long)(item.Value * totalDistance / 1000)); } } }
public static void StartNonNewtTranslation(Entity entity) { var moveDB = entity.GetDataBlob <WarpMovingDB>(); var warpDB = entity.GetDataBlob <WarpAbilityDB>(); var positionDB = entity.GetDataBlob <PositionDB>(); var maxSpeedMS = warpDB.MaxSpeed; var powerDB = entity.GetDataBlob <EnergyGenAbilityDB>(); EnergyGenProcessor.EnergyGen(entity, entity.StarSysDateTime); positionDB.SetParent(null); Vector3 targetPosMt = moveDB.ExitPointAbsolute; Vector3 currentPositionMt = positionDB.AbsolutePosition_m; Vector3 postionDelta = currentPositionMt - targetPosMt; double totalDistance = postionDelta.Length(); var creationCost = warpDB.BubbleCreationCost; var t = totalDistance / warpDB.MaxSpeed; var tcost = t * warpDB.BubbleSustainCost; double estored = powerDB.EnergyStored[warpDB.EnergyType]; if (creationCost <= estored) { var currentVelocityMS = Vector3.Normalise(targetPosMt - currentPositionMt) * maxSpeedMS; warpDB.CurrentVectorMS = currentVelocityMS; moveDB.CurrentNonNewtonionVectorMS = currentVelocityMS; moveDB.LastProcessDateTime = entity.Manager.ManagerSubpulses.StarSysDateTime; //estore = (estore.stored - creationCost, estore.maxStore); powerDB.AddDemand(creationCost, entity.StarSysDateTime); powerDB.AddDemand(-creationCost, entity.StarSysDateTime + TimeSpan.FromSeconds(1)); powerDB.AddDemand(warpDB.BubbleSustainCost, entity.StarSysDateTime + TimeSpan.FromSeconds(1)); //powerDB.EnergyStore[warpDB.EnergyType] = estore; } }
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; }
/// <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>(); 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 speed_kms = newtonMoveDB.CurrentVector_kms.Length(); //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 = Distance.AuToMt(positionDB.GetDistanceTo(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_AU); double distance = Distance.AuToKm(positionDB.RelativePosition_AU).Length(); Vector3 totalForce = gravForceVector + newtonMoveDB.ThrustVector; Vector3 acceleration_mps = totalForce / Mass_Kg; Vector3 newVelocity = (acceleration_mps * timeStep * 0.001) + newtonMoveDB.CurrentVector_kms; newtonMoveDB.CurrentVector_kms = newVelocity; Vector3 deltaPos = (newtonMoveDB.CurrentVector_kms + newVelocity) / 2 * timeStep; //Vector4 deltaPos = newtonMoveDB.CurrentVector_kms * timeStep; positionDB.RelativePosition_AU += Distance.KmToAU(deltaPos); double sOIRadius_AU = OrbitProcessor.GetSOI(newtonMoveDB.SOIParent); if (positionDB.RelativePosition_AU.Length() >= sOIRadius_AU) { 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(orbitDB, entity.Manager.ManagerSubpulses.StarSysDateTime); parentRalitiveVector = Distance.KmToAU(newtonMoveDB.CurrentVector_kms) + parentVelocity; var pvlen = Distance.AuToKm(parentVelocity.Length()); var vlen = newtonMoveDB.CurrentVector_kms.Length(); var rvlen = Distance.AuToKm(parentRalitiveVector.Length()); } 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_kms; parentRalitiveVector = Distance.KmToAU(newtonMoveDB.CurrentVector_kms + parentVelocity); } double newParentMass = newParent.GetDataBlob <MassVolumeDB>().Mass; double sgp = GameConstants.Science.GravitationalConstant * (newParentMass + Mass_Kg) / 3.347928976e33; Vector3 posRalitiveToNewParent = positionDB.AbsolutePosition_AU - newParent.GetDataBlob <PositionDB>().AbsolutePosition_AU; var dateTime = dateTimeNow + TimeSpan.FromSeconds(deltaSeconds - secondsToItterate); var kE = OrbitMath.KeplerFromPositionAndVelocity(sgp, posRalitiveToNewParent, parentRalitiveVector, dateTime); if (kE.Eccentricity < 1) //if we're going to end up in a regular orbit around our new parent { /* * var newOrbit = OrbitDB.FromKeplerElements( * newParent, * newParentMass, * Mass_Kg, * kE, * dateTime); */ var newOrbit = OrbitDB.FromVector(newParent, entity, parentRalitiveVector, dateTime); entity.RemoveDataBlob <NewtonMoveDB>(); entity.SetDataBlob(newOrbit); positionDB.SetParent(newParent); var currentPos = Distance.AuToKm(positionDB.RelativePosition_AU); var newPos = OrbitProcessor.GetPosition_AU(newOrbit, dateTime); var newPosKM = Distance.AuToKm(newPos); positionDB.RelativePosition_AU = newPos; break; } else //else we're in a hyperbolic trajectory around our new parent, so just coninue the newtonion move. { positionDB.SetParent(newParent); newtonMoveDB.ParentMass = newParentMass; newtonMoveDB.SOIParent = newParent; } } secondsToItterate -= timeStep; } newtonMoveDB.LastProcessDateTime = dateTimeFuture; }