93 lines
3.2 KiB
C#
93 lines
3.2 KiB
C#
using Content.Server.Atmos.EntitySystems;
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using Content.Shared.Explosion.Components.OnTrigger;
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using Content.Shared.Explosion.EntitySystems;
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using Robust.Shared.Timing;
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namespace Content.Server.Explosion.EntitySystems;
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/// <summary>
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/// Releases a gas mixture to the atmosphere when triggered.
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/// Can also release gas over a set timespan to prevent trolling people
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/// with the instant-wall-of-pressure-inator.
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/// </summary>
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public sealed partial class ReleaseGasOnTriggerSystem : SharedReleaseGasOnTriggerSystem
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{
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[Dependency] private readonly SharedAppearanceSystem _appearance = default!;
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[Dependency] private readonly AtmosphereSystem _atmosphereSystem = default!;
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[Dependency] private readonly IGameTiming _timing = default!;
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public override void Initialize()
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{
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base.Initialize();
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SubscribeLocalEvent<ReleaseGasOnTriggerComponent, TriggerEvent>(OnTrigger);
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}
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/// <summary>
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/// Shrimply sets the component to active when triggered, allowing it to release over time.
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/// </summary>
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private void OnTrigger(Entity<ReleaseGasOnTriggerComponent> ent, ref TriggerEvent args)
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{
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ent.Comp.Active = true;
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ent.Comp.NextReleaseTime = _timing.CurTime;
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ent.Comp.StartingTotalMoles = ent.Comp.Air.TotalMoles;
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UpdateAppearance(ent.Owner, true);
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}
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public override void Update(float frameTime)
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{
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base.Update(frameTime);
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var curTime = _timing.CurTime;
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var query = EntityQueryEnumerator<ReleaseGasOnTriggerComponent>();
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while (query.MoveNext(out var uid, out var comp))
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{
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if (!comp.Active || comp.NextReleaseTime > curTime)
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continue;
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var giverGasMix = comp.Air.Remove(comp.StartingTotalMoles * comp.RemoveFraction);
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var environment = _atmosphereSystem.GetContainingMixture(uid, false, true);
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if (environment == null)
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{
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UpdateAppearance(uid, false);
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RemCompDeferred<ReleaseGasOnTriggerComponent>(uid);
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continue;
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}
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_atmosphereSystem.Merge(environment, giverGasMix);
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comp.NextReleaseTime += comp.ReleaseInterval;
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if (comp.PressureLimit != 0 && environment.Pressure >= comp.PressureLimit ||
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comp.Air.TotalMoles <= 0)
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{
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UpdateAppearance(uid, false);
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RemCompDeferred<ReleaseGasOnTriggerComponent>(uid);
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continue;
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}
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if (comp.ExponentialRise)
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UpdateExponentialRise(comp, comp.RemoveFraction);
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}
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}
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/// <summary>
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/// Updates the RemoveFraction for exponential rise.
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/// </summary>
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/// <remarks>See https://www.desmos.com/calculator/fx9gfrhoim</remarks>
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private static void UpdateExponentialRise(ReleaseGasOnTriggerComponent comp, float baseFraction)
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{
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comp.TimesReleased++;
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comp.RemoveFraction = 1f - MathF.Pow(1f - baseFraction, comp.TimesReleased);
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}
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private void UpdateAppearance(Entity<AppearanceComponent?> entity, bool state)
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{
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if (!Resolve(entity, ref entity.Comp, false))
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return;
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_appearance.SetData(entity, ReleaseGasOnTriggerComponent.ReleaseGasOnTriggerVisuals.Key, state);
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}
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}
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