fix BeeSwarm bug where the wrong target beehive was chosen

.timetracker

@@ -1,5 +1,5 @@
 {
- "total": 642801,
+ "total": 646950,
  "sessions": [
   {
    "begin": "2026-01-09T17:26:02+01:00",
@@ -1475,6 +1475,16 @@
    "begin": "2026-05-24T06:50:13+02:00",
    "end": "2026-05-24T06:50:54+02:00",
    "duration": 41
+  },
+  {
+   "begin": "2026-05-24T06:51:03+02:00",
+   "end": "2026-05-24T06:53:00+02:00",
+   "duration": 116
+  },
+  {
+   "begin": "2026-05-24T06:53:21+02:00",
+   "end": "2026-05-24T08:00:35+02:00",
+   "duration": 4033
   }
  ]
 }

OrekiWoofsBeehives/BlockEntities/BlockEntityBeeSwarm.cs

@@ -295,19 +295,19 @@ public class BlockEntityBeeSwarm : BlockEntity
         Disperse();
     }
 
-    private void StartMigrating(double nowHours, BlockPos targetPos, bool targetIsVanillaSkep, string? targetPopulatedSkepCode)
+    private void StartMigrating(double nowHours, StructVec3i targetPos, bool targetIsVanillaSkep, string? targetPopulatedSkepCode)
     {
         StopCandidateRefresh();
         SwarmState = SwarmState.MigratingToNewHive;
         stateStartTotalHours = nowHours;
         migrationStartPopulation = Population;
         transferredDuringMigration = 0;
-        this.targetPos = targetPos.Copy();
+        this.targetPos = targetPos.ToBlockPos();
         this.targetIsVanillaSkep = targetIsVanillaSkep;
         this.targetPopulatedSkepCode = targetPopulatedSkepCode;
         retryDay = -1;
 
-        if (!targetIsVanillaSkep && Api.World.BlockAccessor.GetBlockEntity(targetPos) is BlockEntityReusableBeehive targetHive)
+        if (!targetIsVanillaSkep && Api.World.BlockAccessor.GetBlockEntity(this.targetPos) is BlockEntityReusableBeehive targetHive)
             targetHive.SetIncomingSwarm(Pos);
 
         MarkDirty(false);
@@ -382,7 +382,7 @@ public class BlockEntityBeeSwarm : BlockEntity
                     continue;
 
                 var score = CalculateBeehiveTargetScore(hive, targetPos, radius);
-                candidates.Add(new SwarmTargetCandidate(targetPos, false, score, null));
+                candidates.Add(new SwarmTargetCandidate(StructVec3i.FromBlockPos(targetPos), false, score, null));
             }
         }
 
@@ -403,7 +403,7 @@ public class BlockEntityBeeSwarm : BlockEntity
                     continue;
 
                 var score = CalculateSkepTargetScore(targetPos, radius);
-                candidates.Add(new SwarmTargetCandidate(targetPos, true, score, entry.Value));
+                candidates.Add(new SwarmTargetCandidate(StructVec3i.FromBlockPos(targetPos), true, score, entry.Value));
             }
         }
 
@@ -411,13 +411,13 @@ public class BlockEntityBeeSwarm : BlockEntity
         return candidates;
     }
 
-    private bool TryConvertSkepToPopulated(BlockPos pos, string populatedCode)
+    private bool TryConvertSkepToPopulated(StructVec3i pos, string populatedCode)
     {
         var block = Api.World.GetBlock(new AssetLocation(populatedCode));
         if (block == null || block.Id == 0)
             return false;
 
-        Api.World.BlockAccessor.ExchangeBlock(block.BlockId, pos);
+        Api.World.BlockAccessor.ExchangeBlock(block.BlockId, pos.ToBlockPos());
         return true;
     }
 
@@ -612,6 +612,7 @@ public class BlockEntityBeeSwarm : BlockEntity
             tree.SetBlockPos("targetPos", targetPos);
     }
 
+    private readonly BlockPos _tempBlockPos = new(0, 0, 0);
     private TreeArrayAttribute BuildCandidateHivesTreeArray()
     {
         if (targetHiveCandidates == null)
@@ -622,7 +623,8 @@ public class BlockEntityBeeSwarm : BlockEntity
         for (int i = 0; i < count; i++)
         {
             var entry = new TreeAttribute();
-            entry.SetBlockPos("pos", targetHiveCandidates[i].Pos);
+            _tempBlockPos.Set(targetHiveCandidates[i].Pos.X, targetHiveCandidates[i].Pos.Y, targetHiveCandidates[i].Pos.Z);
+            entry.SetBlockPos("pos", _tempBlockPos); // safe, as internally does 3x SetInt
             entries[i] = entry;
         }
         return new TreeArrayAttribute(entries);
@@ -659,5 +661,5 @@ public class BlockEntityBeeSwarm : BlockEntity
         Api.GetOrekiWoofsBeehives()?.BroadcastUnloadDebug(message);
     }
 
-    private readonly record struct SwarmTargetCandidate(BlockPos Pos, bool IsVanillaSkep, double Score, string? PopulatedSkepCode);
+    private readonly record struct SwarmTargetCandidate(StructVec3i Pos, bool IsVanillaSkep, double Score, string? PopulatedSkepCode);
 }

OrekiWoofsBees.Common/StructVec3i.cs

@@ -5,4 +5,6 @@ namespace OrekiWoofsBees.Common;
 public readonly record struct StructVec3i(int X, int Y, int Z)
 {
     public static StructVec3i FromBlockPos(BlockPos pos) => new(pos.X, pos.Y, pos.Z);
+
+    public BlockPos ToBlockPos() => new(X, Y, Z);
 }