refactor(runtime): extract the live object frame

src/AcDream.App/Physics/ProjectileController.cs

@@ -1,5 +1,7 @@
 using System.Numerics;
+using AcDream.App.Rendering;
 using AcDream.App.World;
+using AcDream.Content;
 using AcDream.Core.Net;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Physics;
@@ -9,6 +11,29 @@ using RemoteMotion = AcDream.App.Physics.RemoteMotion;
 
 namespace AcDream.App.Physics;
 
+internal interface IProjectileSetupResolver
+{
+    Setup? Resolve(uint setupId);
+}
+
+internal sealed class DatProjectileSetupResolver : IProjectileSetupResolver
+{
+    private readonly IDatReaderWriter _dats;
+    private readonly object _datLock;
+
+    public DatProjectileSetupResolver(IDatReaderWriter dats, object datLock)
+    {
+        _dats = dats ?? throw new ArgumentNullException(nameof(dats));
+        _datLock = datLock ?? throw new ArgumentNullException(nameof(datLock));
+    }
+
+    public Setup? Resolve(uint setupId)
+    {
+        lock (_datLock)
+            return _dats.Get<Setup>(setupId);
+    }
+}
+
 /// <summary>
 /// Update-thread presentation owner for live retail missiles. Logical identity,
 /// generation, accepted network state, and teardown remain owned by
@@ -56,26 +81,26 @@ internal sealed class ProjectileController
     private readonly LiveEntityRuntime _liveEntities;
     private readonly ProjectilePhysicsStepper _stepper;
     private readonly ShadowObjectRegistry _shadows;
-    private readonly Func<uint, Setup?> _setupResolver;
-    private readonly Action<WorldEntity> _publishRootPose;
-    private readonly Func<(int X, int Y)> _liveCenterProvider;
+    private readonly IProjectileSetupResolver? _setupResolver;
+    private readonly IEntityRootPosePublisher? _rootPoses;
+    private readonly LiveWorldOriginState? _origin;
     private readonly List<LiveEntityRecord> _spatialProjectileSnapshot = new();
     private double _lastFiniteGameTime;
 
     internal ProjectileController(
         LiveEntityRuntime liveEntities,
         PhysicsEngine physicsEngine,
-        Func<uint, Setup?>? setupResolver = null,
-        Action<WorldEntity>? publishRootPose = null,
-        Func<(int X, int Y)>? liveCenterProvider = null)
+        IProjectileSetupResolver? setupResolver = null,
+        IEntityRootPosePublisher? rootPoses = null,
+        LiveWorldOriginState? origin = null)
     {
         _liveEntities = liveEntities ?? throw new ArgumentNullException(nameof(liveEntities));
         ArgumentNullException.ThrowIfNull(physicsEngine);
         _stepper = new ProjectilePhysicsStepper(physicsEngine);
         _shadows = physicsEngine.ShadowObjects;
-        _setupResolver = setupResolver ?? (_ => null);
-        _publishRootPose = publishRootPose ?? (_ => { });
-        _liveCenterProvider = liveCenterProvider ?? (() => (0, 0));
+        _setupResolver = setupResolver;
+        _rootPoses = rootPoses;
+        _origin = origin;
         _liveEntities.ProjectionVisibilityChanged += OnProjectionVisibilityChanged;
     }
 
@@ -322,7 +347,7 @@ internal sealed class ProjectileController
         {
             SuspendOutsideWorld(runtime, entity.Id);
         }
-        _publishRootPose(entity);
+        _rootPoses?.UpdateRoot(entity);
         return true;
     }
 
@@ -472,7 +497,7 @@ internal sealed class ProjectileController
         // A newer State packet can make an already materialized object a
         // missile. TryBind adopts an existing MovementManager body so the
         // live record still represents retail's one CPhysicsObj.
-        Setup? setup = _setupResolver(entity.SourceGfxObjOrSetupId);
+        Setup? setup = _setupResolver?.Resolve(entity.SourceGfxObjOrSetupId);
         if (setup is null)
         {
             DiagnosticSink?.Invoke(
@@ -617,7 +642,7 @@ internal sealed class ProjectileController
         {
             SuspendOutsideWorld(runtime, entity.Id);
         }
-        _publishRootPose(entity);
+        _rootPoses?.UpdateRoot(entity);
         return true;
     }
 
@@ -712,7 +737,7 @@ internal sealed class ProjectileController
                     record.FullCellId,
                     liveCenterX,
                     liveCenterY);
-                _publishRootPose(entity);
+                _rootPoses?.UpdateRoot(entity);
             }
 
             if (IsHidden(record))
@@ -909,7 +934,7 @@ internal sealed class ProjectileController
                 current.FullCellId,
                 liveCenterX,
                 liveCenterY);
-            _publishRootPose(entity);
+            _rootPoses?.UpdateRoot(entity);
             if (!IsCurrentQuantumIdentity(step))
                 return false;
         }
@@ -966,7 +991,8 @@ internal sealed class ProjectileController
             // not lazily on the next simulated quantum: a zero-velocity or
             // newly ordinary retained projectile may have no later projectile
             // step from which to repair its shadow membership.
-            (int liveCenterX, int liveCenterY) = _liveCenterProvider();
+            int liveCenterX = _origin?.CenterX ?? 0;
+            int liveCenterY = _origin?.CenterY ?? 0;
             ShadowPositionSynchronizer.Sync(
                 _shadows,
                 entity.Id,
@@ -975,7 +1001,7 @@ internal sealed class ProjectileController
                 record.FullCellId,
                 liveCenterX,
                 liveCenterY);
-            _publishRootPose(entity);
+            _rootPoses?.UpdateRoot(entity);
             return;
         }