Space Kudzu (#5472)

Content.Server/Kudzu/GrowingKudzuSystem.cs

@@ -0,0 +1,56 @@
+using Content.Shared.Kudzu;
+using Robust.Server.GameObjects;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Random;
+
+namespace Content.Server.Kudzu;
+
+public class GrowingKudzuSystem : EntitySystem
+{
+    [Dependency] private readonly IRobustRandom _robustRandom = default!;
+
+    private float _accumulatedFrameTime = 0.0f;
+
+    public override void Initialize()
+    {
+        SubscribeLocalEvent<GrowingKudzuComponent, ComponentAdd>(SetupKudzu);
+    }
+
+    private void SetupKudzu(EntityUid uid, GrowingKudzuComponent component, ComponentAdd args)
+    {
+        if (!EntityManager.TryGetComponent<AppearanceComponent>(uid, out var appearance))
+        {
+            return;
+        }
+
+        appearance.SetData(KudzuVisuals.Variant, _robustRandom.Next(1, 3));
+        appearance.SetData(KudzuVisuals.GrowthLevel, 1);
+    }
+
+    public override void Update(float frameTime)
+    {
+        _accumulatedFrameTime += frameTime;
+
+        if (!(_accumulatedFrameTime >= 0.5f))
+            return;
+
+        _accumulatedFrameTime -= 0.5f;
+
+        foreach (var (kudzu, appearance) in EntityManager.EntityQuery<GrowingKudzuComponent, AppearanceComponent>())
+        {
+            if (kudzu.GrowthLevel >= 3 || !_robustRandom.Prob(kudzu.GrowthTickSkipChange)) continue;
+            kudzu.GrowthLevel += 1;
+
+            if (kudzu.GrowthLevel == 3 &&
+                EntityManager.TryGetComponent<SpreaderComponent>(kudzu.OwnerUid, out var spreader))
+            {
+                // why cache when you can simply cease to be? Also saves a bit of memory/time.
+                EntityManager.RemoveComponent<GrowingKudzuComponent>(kudzu.OwnerUid);
+            }
+
+            appearance.SetData(KudzuVisuals.GrowthLevel, kudzu.GrowthLevel);
+        }
+    }
+}