Fix vent critters spawn (#17833)

* VentCrittersRule scaling chance + spawn on station

* merge mouse migration and vent critters

* fix prototypes

* check if there is no valid locations

Content.Server/StationEvents/Components/MouseMigrationRuleComponent.cs

@@ -1,16 +0,0 @@
-using Content.Server.StationEvents.Events;
-
-namespace Content.Server.StationEvents.Components;
-
-[RegisterComponent, Access(typeof(MouseMigrationRule))]
-public sealed class MouseMigrationRuleComponent : Component
-{
-    [DataField("spawnedPrototypeChoices")]
-    public List<string> SpawnedPrototypeChoices = new() //we double up for that ez fake probability
-    {
-        "MobMouse",
-        "MobMouse1",
-        "MobMouse2",
-        "MobRatServant"
-    };
-}

Content.Server/StationEvents/Components/VentCrittersRuleComponent.cs

@@ -8,4 +8,10 @@ public sealed class VentCrittersRuleComponent : Component
 {
     [DataField("entries")]
     public List<EntitySpawnEntry> Entries = new();
+
+    /// <summary>
+    /// At least one special entry is guaranteed to spawn
+    /// </summary>
+    [DataField("specialEntries")]
+    public List<EntitySpawnEntry> SpecialEntries = new();
 }

Content.Server/StationEvents/Events/MouseMigrationRule.cs

@@ -1,33 +0,0 @@
-using System.Linq;
-using Content.Server.GameTicking.Rules.Components;
-using Content.Server.StationEvents.Components;
-using Robust.Shared.Random;
-
-namespace Content.Server.StationEvents.Events;
-
-public sealed class MouseMigrationRule : StationEventSystem<MouseMigrationRuleComponent>
-{
-    protected override void Started(EntityUid uid, MouseMigrationRuleComponent component, GameRuleComponent gameRule, GameRuleStartedEvent args)
-    {
-        base.Started(uid, component, gameRule, args);
-
-        var modifier = GetSeverityModifier();
-
-        var spawnLocations = EntityManager.EntityQuery<VentCritterSpawnLocationComponent, TransformComponent>().ToList();
-        RobustRandom.Shuffle(spawnLocations);
-
-        // sqrt so we dont get insane values for ramping events
-        var spawnAmount = (int) (RobustRandom.Next(7, 15) * Math.Sqrt(modifier)); // A small colony of critters.
-
-        for (var i = 0; i < spawnAmount && i < spawnLocations.Count - 1; i++)
-        {
-            var spawnChoice = RobustRandom.Pick(component.SpawnedPrototypeChoices);
-            if (RobustRandom.Prob(Math.Min(0.01f * modifier, 1.0f)) || i == 0) //small chance for multiple, but always at least 1
-                spawnChoice = "SpawnPointGhostRatKing";
-
-            var coords = spawnLocations[i].Item2.Coordinates;
-            Sawmill.Info($"Spawning mouse {spawnChoice} at {coords}");
-            EntityManager.SpawnEntity(spawnChoice, coords);
-        }
-    }
-}

Content.Server/StationEvents/Events/VentCrittersRule.cs

@@ -1,7 +1,9 @@
 using Content.Server.StationEvents.Components;
-using Robust.Shared.Random;
-using System.Linq;
 using Content.Server.GameTicking.Rules.Components;
+using Content.Server.Station.Components;
+using Content.Shared.Storage;
+using Robust.Shared.Map;
+using Robust.Shared.Random;
 
 namespace Content.Server.StationEvents.Events;
 
@@ -16,23 +18,41 @@ public sealed class VentCrittersRule : StationEventSystem<VentCrittersRuleCompon
     {
         base.Started(uid, component, gameRule, args);
 
-        var spawnChoice = RobustRandom.Pick(component.Entries);
+        if (!TryGetRandomStation(out var station))
-        // TODO: What we should actually do is take the component count and then multiply a prob by that
-        // then just iterate until we get it
-        // This will be on average twice as fast.
-        var spawnLocations = EntityManager.EntityQuery<VentCritterSpawnLocationComponent>().ToList();
-        RobustRandom.Shuffle(spawnLocations);
-
-        // A small colony of critters.
-        var spawnAmount = RobustRandom.Next(spawnChoice.Amount, spawnChoice.MaxAmount);
-        Sawmill.Info($"Spawning {spawnAmount} of {spawnChoice}");
-        foreach (var location in spawnLocations)
         {
-            if (spawnAmount-- == 0)
+            return;
-                break;
+        }
 
-            var coords = Transform(location.Owner);
+        var locations = EntityQueryEnumerator<VentCritterSpawnLocationComponent, TransformComponent>();
-            Spawn(spawnChoice.PrototypeId, coords.Coordinates);
+        var validLocations = new List<EntityCoordinates>();
+        while (locations.MoveNext(out _, out _, out var transform))
+        {
+            if (CompOrNull<StationMemberComponent>(transform.GridUid)?.Station == station)
+            {
+                validLocations.Add(transform.Coordinates);
+                foreach (var spawn in EntitySpawnCollection.GetSpawns(component.Entries, RobustRandom))
+                {
+                    Spawn(spawn, transform.Coordinates);
+                }
+            }
+        }
+
+        if (component.SpecialEntries.Count == 0 || validLocations.Count == 0)
+        {
+            return;
+        }
+
+        // guaranteed spawn
+        var specialEntry = RobustRandom.Pick(component.SpecialEntries);
+        var specialSpawn = RobustRandom.Pick(validLocations);
+        Spawn(specialEntry.PrototypeId, specialSpawn);
+
+        foreach (var location in validLocations)
+        {
+            foreach (var spawn in EntitySpawnCollection.GetSpawns(component.SpecialEntries, RobustRandom))
+            {
+                Spawn(spawn, location);
+            }
         }
     }
 }

Resources/Prototypes/GameRules/events.yml

@@ -147,7 +147,19 @@
     minimumPlayers: 35
     weight: 5
     duration: 50
-  - type: MouseMigrationRule
+  - type: VentCrittersRule
+    entries:
+    - id: MobMouse
+      prob: 0.015
+    - id: MobMouse1
+      prob: 0.015
+    - id: MobMouse2
+      prob: 0.015
+    - id: MobRatServant
+      prob: 0.015
+    specialEntries:
+    - id: SpawnPointGhostRatKing
+      prob: 0.005
 
 - type: entity
   id: PowerGridCheck
@@ -230,14 +242,11 @@
   - type: VentCrittersRule
     entries:
     - id: MobMouse
-      amount: 4
+      prob: 0.02
-      maxAmount: 12
     - id: MobMouse1
-      amount: 4
+      prob: 0.02
-      maxAmount: 12
     - id: MobMouse2
-      amount: 4
+      prob: 0.02
-      maxAmount: 12
 
 - type: entity
   id: SlimesSpawn
@@ -252,14 +261,11 @@
   - type: VentCrittersRule
     entries:
     - id: MobAdultSlimesBlueAngry
-        amount: 6
+      prob: 0.02
-        maxAmount: 10
     - id: MobAdultSlimesGreenAngry
-        amount: 6
+      prob: 0.02
-        maxAmount: 10
     - id: MobAdultSlimesYellowAngry
-        amount: 6
+      prob: 0.02
-        maxAmount: 10
 
 - type: entity
   id: SpiderSpawn
@@ -274,8 +280,7 @@
   - type: VentCrittersRule
     entries:
     - id: MobGiantSpiderAngry
-        amount: 4
+      prob: 0.05
-        maxAmount: 8
 
 - type: entity
   id: SpiderClownSpawn
@@ -290,8 +295,7 @@
   - type: VentCrittersRule
     entries:
     - id: MobClownSpider
-        amount: 4
+      prob: 0.05
-        maxAmount: 8
 
 - type: entity
   id: ZombieOutbreak