space-station-14/Content.Shared/Weapons/Ranged/Systems/SharedFlyBySoundSystem.cs

using Content.Shared.Physics;
using Content.Shared.Weapons.Ranged.Components;
using Robust.Shared.Audio;
using Robust.Shared.GameStates;
using Robust.Shared.Physics;
using Robust.Shared.Physics.Collision.Shapes;
using Robust.Shared.Physics.Components;
using Robust.Shared.Physics.Dynamics;
using Robust.Shared.Physics.Systems;
using Robust.Shared.Serialization;

namespace Content.Shared.Weapons.Ranged.Systems;

public abstract class SharedFlyBySoundSystem : EntitySystem
{
    [Dependency] private readonly FixtureSystem _fixtures = default!;

    public const string FlyByFixture = "fly-by";

    public override void Initialize()
    {
        base.Initialize();
        SubscribeLocalEvent<FlyBySoundComponent, ComponentStartup>(OnStartup);
        SubscribeLocalEvent<FlyBySoundComponent, ComponentShutdown>(OnShutdown);
    }

    private void OnStartup(Entity<FlyBySoundComponent> ent, ref ComponentStartup args)
    {
        if (!TryComp<PhysicsComponent>(ent, out var body))
            return;

        var shape = new PhysShapeCircle(ent.Comp.Range);

        _fixtures.TryCreateFixture(ent, shape, FlyByFixture, collisionLayer: (int)CollisionGroup.MobMask, hard: false, body: body);
    }

    private void OnShutdown(Entity<FlyBySoundComponent> ent, ref ComponentShutdown args)
    {
        if (!TryComp<PhysicsComponent>(ent, out var body) ||
            MetaData(ent).EntityLifeStage >= EntityLifeStage.Terminating)
        {
            return;
        }

        _fixtures.DestroyFixture(ent, FlyByFixture, body: body);
    }
}