310 lines
12 KiB
C#
310 lines
12 KiB
C#
namespace SpaceGame.Simulation.Api.Simulation;
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public sealed partial class SimulationEngine
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{
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private const float WarpEngageDistanceKilometers = 250_000f;
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private static float GetLocalTravelSpeed(ShipRuntime ship) =>
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SimulationUnits.MetersPerSecondToKilometersPerSecond(ship.Definition.Speed);
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private static float GetWarpTravelSpeed(ShipRuntime ship) =>
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SimulationUnits.AuPerSecondToKilometersPerSecond(ship.Definition.WarpSpeed);
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private static Vector3 ResolveSystemGalaxyPosition(SimulationWorld world, string systemId) =>
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world.Systems.FirstOrDefault(candidate => string.Equals(candidate.Definition.Id, systemId, StringComparison.Ordinal))?.Position
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?? Vector3.Zero;
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private string UpdateControllerTask(ShipRuntime ship, SimulationWorld world, float deltaSeconds)
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{
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var task = ship.ControllerTask;
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return task.Kind switch
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{
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ControllerTaskKind.Idle => UpdateIdle(ship, world, deltaSeconds),
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ControllerTaskKind.Travel => UpdateTravel(ship, world, deltaSeconds),
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ControllerTaskKind.Extract => UpdateExtract(ship, world, deltaSeconds),
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ControllerTaskKind.Dock => UpdateDock(ship, world, deltaSeconds),
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ControllerTaskKind.Load => UpdateLoadCargo(ship, world, deltaSeconds),
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ControllerTaskKind.Unload => UpdateUnload(ship, world, deltaSeconds),
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ControllerTaskKind.DeliverConstruction => UpdateDeliverConstruction(ship, world, deltaSeconds),
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ControllerTaskKind.BuildConstructionSite => UpdateBuildConstructionSite(ship, world, deltaSeconds),
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ControllerTaskKind.ConstructModule => UpdateConstructModule(ship, world, deltaSeconds),
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ControllerTaskKind.Undock => UpdateUndock(ship, world, deltaSeconds),
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_ => UpdateIdle(ship, world, deltaSeconds),
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};
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}
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private static string UpdateIdle(ShipRuntime ship, SimulationWorld world, float deltaSeconds)
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{
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ship.State = ShipState.Idle;
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ship.TargetPosition = ship.Position;
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return "none";
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}
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private string UpdateTravel(ShipRuntime ship, SimulationWorld world, float deltaSeconds)
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{
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var task = ship.ControllerTask;
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if (task.TargetPosition is null || task.TargetSystemId is null)
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{
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ship.State = ShipState.Idle;
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ship.TargetPosition = ship.Position;
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return "none";
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}
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// Resolve live position each frame — entities like stations orbit celestials and move every tick
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var targetPosition = ResolveCurrentTargetPosition(world, task);
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var targetCelestial = ResolveTravelTargetCelestial(world, task, targetPosition);
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var distance = ship.Position.DistanceTo(targetPosition);
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ship.TargetPosition = targetPosition;
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if (ship.SystemId != task.TargetSystemId)
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{
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if (!HasShipCapabilities(ship.Definition, "ftl"))
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{
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ship.State = ShipState.Idle;
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return "none";
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}
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var destinationEntryCelestial = ResolveSystemEntryCelestial(world, task.TargetSystemId);
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var destinationEntryPosition = destinationEntryCelestial?.Position ?? Vector3.Zero;
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return UpdateFtlTransit(ship, world, deltaSeconds, task.TargetSystemId, destinationEntryPosition, destinationEntryCelestial);
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}
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var currentCelestial = ResolveCurrentCelestial(world, ship);
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if (targetCelestial is not null && currentCelestial is not null && !string.Equals(currentCelestial.Id, targetCelestial.Id, StringComparison.Ordinal))
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{
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if (!HasShipCapabilities(ship.Definition, "warp"))
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{
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return UpdateLocalTravel(ship, world, deltaSeconds, task.TargetSystemId, targetPosition, targetCelestial, task.Threshold);
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}
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return UpdateWarpTransit(ship, world, deltaSeconds, targetPosition, targetCelestial);
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}
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if (targetCelestial is not null
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&& distance > WarpEngageDistanceKilometers
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&& HasShipCapabilities(ship.Definition, "warp"))
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{
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return UpdateWarpTransit(ship, world, deltaSeconds, targetPosition, targetCelestial);
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}
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return UpdateLocalTravel(ship, world, deltaSeconds, task.TargetSystemId, targetPosition, targetCelestial, task.Threshold);
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}
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private static Vector3 ResolveCurrentTargetPosition(SimulationWorld world, ControllerTaskRuntime task)
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{
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if (!string.IsNullOrWhiteSpace(task.TargetEntityId))
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{
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var station = world.Stations.FirstOrDefault(candidate => candidate.Id == task.TargetEntityId);
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if (station is not null)
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{
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return station.Position;
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}
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var celestial = world.Celestials.FirstOrDefault(candidate => candidate.Id == task.TargetEntityId);
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if (celestial is not null)
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{
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return celestial.Position;
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}
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}
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return task.TargetPosition!.Value;
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}
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private static CelestialRuntime? ResolveTravelTargetCelestial(SimulationWorld world, ControllerTaskRuntime task, Vector3 targetPosition)
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{
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if (!string.IsNullOrWhiteSpace(task.TargetEntityId))
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{
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var station = world.Stations.FirstOrDefault(candidate => candidate.Id == task.TargetEntityId);
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if (station?.CelestialId is not null)
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{
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return world.Celestials.FirstOrDefault(candidate => candidate.Id == station.CelestialId);
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}
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var celestial = world.Celestials.FirstOrDefault(candidate => candidate.Id == task.TargetEntityId);
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if (celestial is not null)
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{
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return celestial;
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}
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}
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return world.Celestials
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.Where(candidate => task.TargetSystemId is null || candidate.SystemId == task.TargetSystemId)
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.OrderBy(candidate => candidate.Position.DistanceTo(targetPosition))
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.FirstOrDefault();
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}
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private static CelestialRuntime? ResolveCurrentCelestial(SimulationWorld world, ShipRuntime ship)
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{
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if (ship.SpatialState.CurrentCelestialId is not null)
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{
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return world.Celestials.FirstOrDefault(candidate => candidate.Id == ship.SpatialState.CurrentCelestialId);
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}
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return world.Celestials
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.Where(candidate => candidate.SystemId == ship.SystemId)
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.OrderBy(candidate => candidate.Position.DistanceTo(ship.Position))
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.FirstOrDefault();
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}
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private static CelestialRuntime? ResolveSystemEntryCelestial(SimulationWorld world, string systemId) =>
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world.Celestials.FirstOrDefault(candidate =>
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candidate.SystemId == systemId &&
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candidate.Kind == SpatialNodeKind.Star);
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private string UpdateLocalTravel(
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ShipRuntime ship,
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SimulationWorld world,
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float deltaSeconds,
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string targetSystemId,
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Vector3 targetPosition,
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CelestialRuntime? targetCelestial,
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float threshold)
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{
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var distance = ship.Position.DistanceTo(targetPosition);
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ship.SpatialState.SpaceLayer = SpaceLayerKinds.LocalSpace;
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ship.SpatialState.MovementRegime = MovementRegimeKinds.LocalFlight;
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ship.SpatialState.Transit = null;
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ship.SpatialState.DestinationNodeId = targetCelestial?.Id;
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if (distance <= threshold)
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{
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ship.ActionTimer = 0f;
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ship.Position = targetPosition;
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ship.TargetPosition = ship.Position;
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ship.SystemId = targetSystemId;
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ship.SpatialState.CurrentCelestialId = targetCelestial?.Id;
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ship.State = ShipState.Arriving;
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return "arrived";
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}
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ship.ActionTimer = 0f;
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ship.State = ShipState.LocalFlight;
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ship.Position = ship.Position.MoveToward(targetPosition, GetLocalTravelSpeed(ship) * deltaSeconds);
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return "none";
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}
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private string UpdateWarpTransit(ShipRuntime ship, SimulationWorld world, float deltaSeconds, Vector3 targetPosition, CelestialRuntime targetCelestial)
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{
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var transit = ship.SpatialState.Transit;
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if (transit is null || transit.Regime != MovementRegimeKinds.Warp || transit.DestinationNodeId != targetCelestial.Id)
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{
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transit = new ShipTransitRuntime
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{
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Regime = MovementRegimeKinds.Warp,
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OriginNodeId = ship.SpatialState.CurrentCelestialId,
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DestinationNodeId = targetCelestial.Id,
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StartedAtUtc = world.GeneratedAtUtc,
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};
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ship.SpatialState.Transit = transit;
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}
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ship.SpatialState.SpaceLayer = SpaceLayerKinds.SystemSpace;
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ship.SpatialState.MovementRegime = MovementRegimeKinds.Warp;
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ship.SpatialState.CurrentCelestialId = null;
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ship.SpatialState.DestinationNodeId = targetCelestial.Id;
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var spoolDuration = MathF.Max(0.4f, ship.Definition.SpoolTime * 0.5f);
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if (ship.State != ShipState.Warping)
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{
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if (ship.State != ShipState.SpoolingWarp)
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{
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ship.ActionTimer = 0f;
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}
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ship.State = ShipState.SpoolingWarp;
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if (!AdvanceTimedAction(ship, deltaSeconds, spoolDuration))
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{
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return "none";
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}
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ship.State = ShipState.Warping;
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}
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var totalDistance = MathF.Max(0.001f, transit.OriginNodeId is null
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? ship.Position.DistanceTo(targetPosition)
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: (world.Celestials.FirstOrDefault(candidate => candidate.Id == transit.OriginNodeId)?.Position.DistanceTo(targetPosition) ?? ship.Position.DistanceTo(targetPosition)));
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ship.Position = ship.Position.MoveToward(targetPosition, GetWarpTravelSpeed(ship) * deltaSeconds);
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transit.Progress = MathF.Min(1f, 1f - (ship.Position.DistanceTo(targetPosition) / totalDistance));
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return ship.Position.DistanceTo(targetPosition) <= 18f
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? CompleteTransitArrival(ship, targetCelestial.SystemId, targetPosition, targetCelestial)
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: "none";
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}
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private string UpdateFtlTransit(ShipRuntime ship, SimulationWorld world, float deltaSeconds, string targetSystemId, Vector3 targetPosition, CelestialRuntime? targetCelestial)
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{
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var destinationNodeId = targetCelestial?.Id;
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var transit = ship.SpatialState.Transit;
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if (transit is null || transit.Regime != MovementRegimeKinds.FtlTransit || transit.DestinationNodeId != destinationNodeId)
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{
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transit = new ShipTransitRuntime
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{
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Regime = MovementRegimeKinds.FtlTransit,
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OriginNodeId = ship.SpatialState.CurrentCelestialId,
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DestinationNodeId = destinationNodeId,
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StartedAtUtc = world.GeneratedAtUtc,
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};
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ship.SpatialState.Transit = transit;
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}
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ship.SpatialState.SpaceLayer = SpaceLayerKinds.GalaxySpace;
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ship.SpatialState.MovementRegime = MovementRegimeKinds.FtlTransit;
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ship.SpatialState.CurrentCelestialId = null;
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ship.SpatialState.DestinationNodeId = destinationNodeId;
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if (ship.State != ShipState.Ftl)
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{
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if (ship.State != ShipState.SpoolingFtl)
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{
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ship.ActionTimer = 0f;
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}
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ship.State = ShipState.SpoolingFtl;
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if (!AdvanceTimedAction(ship, deltaSeconds, ship.Definition.SpoolTime))
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{
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return "none";
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}
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ship.State = ShipState.Ftl;
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}
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var originSystemPosition = ResolveSystemGalaxyPosition(world, ship.SystemId);
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var destinationSystemPosition = ResolveSystemGalaxyPosition(world, targetSystemId);
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var totalDistance = MathF.Max(0.001f, originSystemPosition.DistanceTo(destinationSystemPosition));
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transit.Progress = MathF.Min(1f, transit.Progress + ((ship.Definition.FtlSpeed * deltaSeconds) / totalDistance));
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return transit.Progress >= 0.999f
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? CompleteSystemEntryArrival(ship, targetSystemId, targetPosition, targetCelestial)
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: "none";
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}
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private static string CompleteTransitArrival(ShipRuntime ship, string targetSystemId, Vector3 targetPosition, CelestialRuntime? targetCelestial)
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{
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ship.ActionTimer = 0f;
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ship.Position = targetPosition;
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ship.TargetPosition = targetPosition;
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ship.SystemId = targetSystemId;
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ship.SpatialState.Transit = null;
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ship.SpatialState.SpaceLayer = SpaceLayerKinds.LocalSpace;
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ship.SpatialState.MovementRegime = MovementRegimeKinds.LocalFlight;
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ship.SpatialState.CurrentCelestialId = targetCelestial?.Id;
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ship.SpatialState.DestinationNodeId = targetCelestial?.Id;
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ship.State = ShipState.Arriving;
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return "arrived";
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}
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private static string CompleteSystemEntryArrival(ShipRuntime ship, string targetSystemId, Vector3 targetPosition, CelestialRuntime? targetCelestial)
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{
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ship.ActionTimer = 0f;
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ship.Position = targetPosition;
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ship.TargetPosition = targetPosition;
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ship.SystemId = targetSystemId;
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ship.SpatialState.Transit = null;
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ship.SpatialState.SpaceLayer = SpaceLayerKinds.LocalSpace;
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ship.SpatialState.MovementRegime = MovementRegimeKinds.LocalFlight;
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ship.SpatialState.CurrentCelestialId = targetCelestial?.Id;
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ship.SpatialState.DestinationNodeId = targetCelestial?.Id;
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ship.State = ShipState.Arriving;
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return "none";
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}
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}
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