Files
tbd-station-14/Content.Server/Kudzu/SpreaderSystem.cs
2022-02-16 18:23:23 +11:00

139 lines
4.4 KiB
C#

using System.Collections.Generic;
using System.Linq;
using Content.Server.Atmos.Components;
using Content.Server.Atmos.EntitySystems;
using Content.Server.Temperature.Systems;
using Content.Shared.Atmos;
using Robust.Shared.GameObjects;
using Robust.Shared.IoC;
using Robust.Shared.Map;
using Robust.Shared.Maths;
using Robust.Shared.Random;
namespace Content.Server.Kudzu;
// Future work includes making the growths per interval thing not global, but instead per "group"
public sealed class SpreaderSystem : EntitySystem
{
[Dependency] private readonly IRobustRandom _robustRandom = default!;
[Dependency] private readonly IMapManager _mapManager = default!;
/// <summary>
/// Maximum number of edges that can grow out every interval.
/// </summary>
private const int GrowthsPerInterval = 1;
private float _accumulatedFrameTime = 0.0f;
private readonly HashSet<EntityUid> _edgeGrowths = new ();
public override void Initialize()
{
SubscribeLocalEvent<SpreaderComponent, ComponentAdd>(SpreaderAddHandler);
SubscribeLocalEvent<AirtightChanged>(OnAirtightChanged);
}
private void OnAirtightChanged(AirtightChanged e)
{
UpdateNearbySpreaders((e.Airtight).Owner, e.Airtight);
}
private void SpreaderAddHandler(EntityUid uid, SpreaderComponent component, ComponentAdd args)
{
if (component.Enabled)
_edgeGrowths.Add(uid); // ez
}
public void UpdateNearbySpreaders(EntityUid blocker, AirtightComponent comp)
{
if (!EntityManager.TryGetComponent<TransformComponent>(blocker, out var transform))
return; // how did we get here?
if (!_mapManager.TryGetGrid(transform.GridID, out var grid)) return;
for (var i = 0; i < Atmospherics.Directions; i++)
{
var direction = (AtmosDirection) (1 << i);
if (!comp.AirBlockedDirection.IsFlagSet(direction)) continue;
foreach (var ent in grid.GetInDir(transform.Coordinates, direction.ToDirection()))
{
if (EntityManager.TryGetComponent<SpreaderComponent>(ent, out var s) && s.Enabled)
_edgeGrowths.Add(ent);
}
}
}
public override void Update(float frameTime)
{
_accumulatedFrameTime += frameTime;
if (!(_accumulatedFrameTime >= 1.0f))
return;
_accumulatedFrameTime -= 1.0f;
var growthList = _edgeGrowths.ToList();
_robustRandom.Shuffle(growthList);
var successes = 0;
foreach (var entity in growthList)
{
if (!TryGrow(entity)) continue;
successes += 1;
if (successes >= GrowthsPerInterval)
break;
}
}
private bool TryGrow(EntityUid ent, TransformComponent? transform = null, SpreaderComponent? spreader = null)
{
if (!Resolve(ent, ref transform, ref spreader, false))
return false;
if (spreader.Enabled == false) return false;
if (!_mapManager.TryGetGrid(transform.GridID, out var grid)) return false;
var didGrow = false;
for (var i = 0; i < 4; i++)
{
var direction = (DirectionFlag) (1 << i);
var coords = transform.Coordinates.Offset(direction.AsDir().ToVec());
if (grid.GetTileRef(coords).Tile.IsEmpty || _robustRandom.Prob(spreader.Chance)) continue;
var ents = grid.GetLocal(coords);
if (ents.Any(x => IsTileBlockedFrom(x, direction))) continue;
// Ok, spawn a plant
didGrow = true;
EntityManager.SpawnEntity(spreader.GrowthResult, transform.Coordinates.Offset(direction.AsDir().ToVec()));
}
return didGrow;
}
public void EnableSpreader(EntityUid ent, SpreaderComponent? component = null)
{
if (!Resolve(ent, ref component))
return;
component.Enabled = true;
_edgeGrowths.Add(ent);
}
private bool IsTileBlockedFrom(EntityUid ent, DirectionFlag dir)
{
if (EntityManager.TryGetComponent<SpreaderComponent>(ent, out _))
return true;
if (!EntityManager.TryGetComponent<AirtightComponent>(ent, out var airtight))
return false;
var oppositeDir = dir.AsDir().GetOpposite().ToAtmosDirection();
return airtight.AirBlocked && airtight.AirBlockedDirection.IsFlagSet(oppositeDir);
}
}