优化输入回放逻辑 + 调整项目结构

Assets/Scripts/Network/NetworkApplication/ClientPredictionBuffer.cs

@@ -1,23 +1,9 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using Network.Defines;
 
 namespace Network.NetworkApplication
 {
-    public readonly struct PredictedMoveStep
-    {
-        public PredictedMoveStep(MoveInput input, float simulatedDurationSeconds)
-        {
-            Input = input ?? throw new ArgumentNullException(nameof(input));
-            SimulatedDurationSeconds = simulatedDurationSeconds < 0f ? 0f : simulatedDurationSeconds;
-        }
-
-        public MoveInput Input { get; }
-
-        public float SimulatedDurationSeconds { get; }
-    }
-
     public sealed class ClientPredictionBuffer
     {
         private readonly List<PredictedMoveStep> pendingInputs = new();
@@ -64,33 +50,38 @@ namespace Network.NetworkApplication
             pendingInputs.Add(new PredictedMoveStep(input, 0f));
         }
 
-        public void AccumulateLatest(float simulatedDurationSeconds)
+        public bool TryGetNextUnsimulatedInput(out PredictedMoveStep predictedMoveStep)
         {
-            if (pendingInputs.Count == 0 || simulatedDurationSeconds <= 0f)
+            for (var i = 0; i < pendingInputs.Count; i++)
+            {
+                if (pendingInputs[i].SimulatedDurationSeconds <= 0f)
+                {
+                    predictedMoveStep = pendingInputs[i];
+                    return true;
+                }
+            }
+
+            predictedMoveStep = default;
+            return false;
+        }
+
+        public void MarkInputSimulated(long tick, float simulatedDurationSeconds)
+        {
+            if (simulatedDurationSeconds <= 0f)
             {
                 return;
             }
 
-            var latest = pendingInputs[^1];
-            pendingInputs[^1] =
-                new PredictedMoveStep(latest.Input, latest.SimulatedDurationSeconds + simulatedDurationSeconds);
+            for (var i = 0; i < pendingInputs.Count; i++)
+            {
+                if (pendingInputs[i].Input.Tick != tick)
+                {
+                    continue;
                 }
 
-        /// <summary>
-        /// Accumulate pending input duration using the actual elapsed wall-clock time
-        /// since the last authoritative state, not the fixed simulation cadence.
-        /// This synchronizes accumulation with the server's 20Hz authoritative cadence.
-        /// </summary>
-        public void AccumulateWithElapsedTime(float elapsedSinceLastState)
-        {
-            if (pendingInputs.Count == 0 || elapsedSinceLastState <= 0f || !float.IsFinite(elapsedSinceLastState))
-            {
+                pendingInputs[i] = new PredictedMoveStep(pendingInputs[i].Input, simulatedDurationSeconds);
                 return;
             }
-
-            var latest = pendingInputs[^1];
-            pendingInputs[^1] =
-                new PredictedMoveStep(latest.Input, latest.SimulatedDurationSeconds + elapsedSinceLastState);
         }
 
         public bool TryApplyAuthoritativeState(PlayerState state, float currentTime,
@@ -110,7 +101,7 @@ namespace Network.NetworkApplication
             LastAuthoritativeTick = state.Tick;
             LastAcknowledgedMoveTick = state.AcknowledgedMoveTick;
             pendingInputs.RemoveAll(input => input.Input.Tick <= state.AcknowledgedMoveTick);
-            replayInputs = pendingInputs.ToArray();
+            replayInputs = pendingInputs.FindAll(input => input.SimulatedDurationSeconds > 0f);
 
             // Reset the elapsed-time tracker so the next accumulation period
             // starts from this authoritative state's arrival time.

Assets/Scripts/Network/NetworkApplication/PredictedMoveStep.cs

@@ -0,0 +1,18 @@
+using System;
+using Network.Defines;
+
+namespace Network.NetworkApplication
+{
+    public readonly struct PredictedMoveStep
+    {
+        public PredictedMoveStep(MoveInput input, float simulatedDurationSeconds)
+        {
+            Input = input ?? throw new ArgumentNullException(nameof(input));
+            SimulatedDurationSeconds = simulatedDurationSeconds < 0f ? 0f : simulatedDurationSeconds;
+        }
+
+        public MoveInput Input { get; }
+
+        public float SimulatedDurationSeconds { get; }
+    }
+}

Assets/Scripts/Network/NetworkApplication/PredictedMoveStep.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 20280892ecfd4b25bff064d07668accc
+timeCreated: 1775619625

Assets/Scripts/Player/Input.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 309fec203b04d2b4cb87f9c2873c0449
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Player/Input/IInputSource.cs

@@ -0,0 +1,11 @@
+using UnityEngine;
+
+/// <summary>
+/// 输入源接口，用于解耦输入捕获
+/// </summary>
+public interface IInputSource
+{
+    Vector3 GetPlanarInput();
+    bool ConsumeShootInput();
+    Vector3 GetAimDirection();
+}

Assets/Scripts/Player/Input/IInputSource.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e7d6671c80a243619f1f3dc34ca92d15
+timeCreated: 1775619222

Assets/Scripts/Player/Input/InputComponent.cs

@@ -1,129 +1,8 @@
 using System;
-using System.Collections.Generic;
 using Network.Defines;
 using UnityEngine;
 using Vector3 = UnityEngine.Vector3;
 
-/// <summary>
-/// 输入源接口，用于解耦输入捕获
-/// </summary>
-public interface IInputSource
-{
-    Vector3 GetPlanarInput();
-    bool ConsumeShootInput();
-    Vector3 GetAimDirection();
-}
-
-/// <summary>
-/// 真实的 Unity 输入源
-/// </summary>
-public class UnityInputSource : IInputSource
-{
-    private readonly Transform _cameraTransform;
-
-    public UnityInputSource(Transform cameraTransform)
-    {
-        _cameraTransform = cameraTransform;
-    }
-
-    public Vector3 GetPlanarInput()
-    {
-        return new Vector3(Input.GetAxisRaw("Horizontal"), 0f, Input.GetAxisRaw("Vertical"));
-    }
-
-    public bool ConsumeShootInput()
-    {
-        return Input.GetMouseButtonDown(0);
-    }
-
-    public Vector3 GetAimDirection()
-    {
-        if (_cameraTransform != null)
-        {
-            return _cameraTransform.forward;
-        }
-        return Vector3.forward;
-    }
-}
-
-/// <summary>
-/// 模拟输入源（测试用），提供预设的输入序列
-/// </summary>
-public class SimulatedInputSource : IInputSource
-{
-    private readonly (float turn, float throttle)[] _inputSequence;
-    private int _index;
-    private Vector3 _lastAimDirection = Vector3.forward;
-    private bool _shootTriggered;
-
-    public SimulatedInputSource((float turn, float throttle)[] sequence)
-    {
-        _inputSequence = sequence;
-        _index = 0;
-    }
-
-    public Vector3 GetPlanarInput()
-    {
-        if (_index >= _inputSequence.Length)
-        {
-            return Vector3.zero;
-        }
-        var (turn, throttle) = _inputSequence[_index];
-        return new Vector3(turn, 0f, throttle);
-    }
-
-    public bool ConsumeShootInput()
-    {
-        if (_shootTriggered)
-        {
-            _shootTriggered = false;
-            return true;
-        }
-        return false;
-    }
-
-    public Vector3 GetAimDirection()
-    {
-        return _lastAimDirection;
-    }
-
-    /// <summary>
-    /// 推进到下一个输入
-    /// </summary>
-    public void Advance()
-    {
-        if (_index < _inputSequence.Length)
-        {
-            _index++;
-        }
-    }
-
-    /// <summary>
-    /// 是否还有更多输入
-    /// </summary>
-    public bool HasMore => _index < _inputSequence.Length;
-
-    /// <summary>
-    /// 设置射击触发（下次 ConsumeShootInput 返回 true）
-    /// </summary>
-    public void SetShootTriggered()
-    {
-        _shootTriggered = true;
-    }
-
-    /// <summary>
-    /// 设置瞄准方向
-    /// </summary>
-    public void SetAimDirection(Vector3 direction)
-    {
-        _lastAimDirection = direction;
-    }
-
-    /// <summary>
-    /// 获取当前输入索引
-    /// </summary>
-    public int CurrentIndex => _index;
-}
 
 /// <summary>
 /// 输入组件，负责从 IInputSource 获取输入、发送 MoveInput 到服务器、管理 tick
@@ -142,8 +21,8 @@ public class InputComponent : MonoBehaviour
     private bool _wasMovingLastFrame;
     private long _tick;
 
-    public event System.Action<MoveInput> OnMoveInputCreated;
-    public event System.Action<ShootInput> OnShootInputCreated;
+    public event Action<MoveInput> OnMoveInputCreated;
+    public event Action<ShootInput> OnShootInputCreated;
 
     public long CurrentTick => _tick;
 
@@ -191,7 +70,7 @@ public class InputComponent : MonoBehaviour
         _currentInput = _inputSource?.GetPlanarInput() ?? Vector3.zero;
 
         // 检测移动状态变化
-        var hasMovement = ClientGameplayInputFlow.HasPlanarInput(_currentInput);
+        bool hasMovement = ClientGameplayInputFlow.HasPlanarInput(_currentInput);
         if (hasMovement)
         {
             _stopMessagePending = false;

Assets/Scripts/Player/Input/SimulatedInputSource.cs

@@ -0,0 +1,82 @@
+using UnityEngine;
+
+/// <summary>
+/// 模拟输入源（测试用），提供预设的输入序列
+/// </summary>
+public class SimulatedInputSource : IInputSource
+{
+    private readonly (float turn, float throttle)[] _inputSequence;
+    private int _index;
+    private Vector3 _lastAimDirection = Vector3.forward;
+    private bool _shootTriggered;
+
+    public SimulatedInputSource((float turn, float throttle)[] sequence)
+    {
+        _inputSequence = sequence;
+        _index = 0;
+    }
+
+    public Vector3 GetPlanarInput()
+    {
+        if (_index >= _inputSequence.Length)
+        {
+            return Vector3.zero;
+        }
+
+        var (turn, throttle) = _inputSequence[_index];
+        return new Vector3(turn, 0f, throttle);
+    }
+
+    public bool ConsumeShootInput()
+    {
+        if (_shootTriggered)
+        {
+            _shootTriggered = false;
+            return true;
+        }
+
+        return false;
+    }
+
+    public Vector3 GetAimDirection()
+    {
+        return _lastAimDirection;
+    }
+
+    /// <summary>
+    /// 推进到下一个输入
+    /// </summary>
+    public void Advance()
+    {
+        if (_index < _inputSequence.Length)
+        {
+            _index++;
+        }
+    }
+
+    /// <summary>
+    /// 是否还有更多输入
+    /// </summary>
+    public bool HasMore => _index < _inputSequence.Length;
+
+    /// <summary>
+    /// 设置射击触发（下次 ConsumeShootInput 返回 true）
+    /// </summary>
+    public void SetShootTriggered()
+    {
+        _shootTriggered = true;
+    }
+
+    /// <summary>
+    /// 设置瞄准方向
+    /// </summary>
+    public void SetAimDirection(Vector3 direction)
+    {
+        _lastAimDirection = direction;
+    }
+
+    /// <summary>
+    /// 获取当前输入索引
+    /// </summary>
+    public int CurrentIndex => _index;
+}

Assets/Scripts/Player/Input/SimulatedInputSource.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 53e3773e493842e8861ac7522a6227a9
+timeCreated: 1775619270

Assets/Scripts/Player/Input/UnityInputSource.cs

@@ -0,0 +1,34 @@
+using UnityEngine;
+
+/// <summary>
+/// 真实的 Unity 输入源
+/// </summary>
+public class UnityInputSource : IInputSource
+{
+    private readonly Transform _cameraTransform;
+
+    public UnityInputSource(Transform cameraTransform)
+    {
+        _cameraTransform = cameraTransform;
+    }
+
+    public Vector3 GetPlanarInput()
+    {
+        return new Vector3(Input.GetAxisRaw("Horizontal"), 0f, Input.GetAxisRaw("Vertical"));
+    }
+
+    public bool ConsumeShootInput()
+    {
+        return Input.GetMouseButtonDown(0);
+    }
+
+    public Vector3 GetAimDirection()
+    {
+        if (_cameraTransform != null)
+        {
+            return _cameraTransform.forward;
+        }
+
+        return Vector3.forward;
+    }
+}

Assets/Scripts/Player/Input/UnityInputSource.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5d7f0a25d2b54decbf2c2386e5c0ebd2
+timeCreated: 1775619246

Assets/Scripts/Player/MovementComponent.cs

@@ -3,23 +3,37 @@ using UnityEngine;
 public class MovementComponent : MonoBehaviour
 {
     [SerializeField] private Rigidbody _rigid;
-    private const float InterpolationAlpha = 0.15f;
+    [SerializeField] private float _followMoveSpeed = 2f;
+    [SerializeField] private float _followTurnSpeedDegreesPerSecond = 180f;
+    [SerializeField] private float _correctionDecayMoveSpeed = 4f;
+    [SerializeField] private float _correctionDecayTurnSpeedDegreesPerSecond = 360f;
+    private const float RemoteInterpolationAlpha = 0.15f;
+    private const float UnexpectedTurnLogCooldownSeconds = 0.25f;
 
     private bool _isControlled;
     private Vector3 _currentPosition;
     private Quaternion _currentRotation;
     private Vector3 _targetPosition;
     private Quaternion _targetRotation;
+    private Vector3 _correctionPositionOffset;
+    private Quaternion _correctionRotationOffset = Quaternion.identity;
+    private float _expectedTurnInput;
+    private float _lastUnexpectedTurnLogTime = float.NegativeInfinity;
 
     private void Awake()
     {
         _rigid ??= GetComponent<Rigidbody>();
     }
 
-    public void Init(bool isControlled)
+    public void Init(bool isControlled, float followMoveSpeed = 2f, float followTurnSpeedDegreesPerSecond = 180f)
     {
         _rigid ??= GetComponent<Rigidbody>();
         _isControlled = isControlled;
+        _followMoveSpeed = Mathf.Max(0f, followMoveSpeed);
+        _followTurnSpeedDegreesPerSecond = Mathf.Max(0f, followTurnSpeedDegreesPerSecond);
+        _correctionDecayMoveSpeed = Mathf.Max(_followMoveSpeed * 2f, _followMoveSpeed);
+        _correctionDecayTurnSpeedDegreesPerSecond =
+            Mathf.Max(_followTurnSpeedDegreesPerSecond * 2f, _followTurnSpeedDegreesPerSecond);
         _rigid.interpolation = isControlled ? RigidbodyInterpolation.None : RigidbodyInterpolation.Interpolate;
         _rigid.isKinematic = !isControlled;
         _rigid.velocity = Vector3.zero;
@@ -29,16 +43,45 @@ public class MovementComponent : MonoBehaviour
         _currentRotation = _rigid.rotation;
         _targetPosition = _rigid.position;
         _targetRotation = _rigid.rotation;
+        _correctionPositionOffset = Vector3.zero;
+        _correctionRotationOffset = Quaternion.identity;
     }
 
     private void Update()
     {
-        _currentPosition = Vector3.Lerp(_currentPosition, _targetPosition, InterpolationAlpha);
-        _currentRotation = Quaternion.Slerp(_currentRotation, _targetRotation, InterpolationAlpha);
+        var beforeRotation = _currentRotation;
+
+        if (_isControlled)
+        {
+            _correctionPositionOffset = Vector3.MoveTowards(
+                _correctionPositionOffset,
+                Vector3.zero,
+                _correctionDecayMoveSpeed * Time.deltaTime);
+            _correctionRotationOffset = Quaternion.RotateTowards(
+                _correctionRotationOffset,
+                Quaternion.identity,
+                _correctionDecayTurnSpeedDegreesPerSecond * Time.deltaTime);
+
+            var desiredPosition = _targetPosition + _correctionPositionOffset;
+            var desiredRotation = _targetRotation * _correctionRotationOffset;
+
+            _currentPosition = Vector3.MoveTowards(_currentPosition, desiredPosition, _followMoveSpeed * Time.deltaTime);
+            _currentRotation = Quaternion.RotateTowards(
+                _currentRotation,
+                desiredRotation,
+                _followTurnSpeedDegreesPerSecond * Time.deltaTime);
+        }
+        else
+        {
+            _currentPosition = Vector3.Lerp(_currentPosition, _targetPosition, RemoteInterpolationAlpha);
+            _currentRotation = Quaternion.Slerp(_currentRotation, _targetRotation, RemoteInterpolationAlpha);
+        }
 
         _rigid.position = _currentPosition;
         _rigid.rotation = _currentRotation;
 
+        LogUnexpectedTurnIfNeeded(beforeRotation, _currentRotation);
+
         if (_isControlled && MainUI.Instance != null)
         {
             MainUI.Instance.OnClientPosChanged(_currentPosition);
@@ -59,13 +102,68 @@ public class MovementComponent : MonoBehaviour
         _targetRotation = rotation;
     }
 
+    public void SetExpectedTurnInput(float expectedTurnInput)
+    {
+        _expectedTurnInput = expectedTurnInput;
+    }
+
+    public void BlendToPoseFromCurrent(Vector3 position, Quaternion rotation)
+    {
+        _targetPosition = position;
+        _targetRotation = rotation;
+        _correctionPositionOffset = _currentPosition - position;
+        _correctionRotationOffset = Quaternion.Inverse(rotation) * _currentRotation;
+    }
+
     public void SnapToPose(Vector3 position, Quaternion rotation)
     {
         _currentPosition = position;
         _currentRotation = rotation;
         _targetPosition = position;
         _targetRotation = rotation;
+        _correctionPositionOffset = Vector3.zero;
+        _correctionRotationOffset = Quaternion.identity;
         _rigid.position = position;
         _rigid.rotation = rotation;
     }
+
+    private void LogUnexpectedTurnIfNeeded(Quaternion beforeRotation, Quaternion afterRotation)
+    {
+        if (!_isControlled || Mathf.Abs(_expectedTurnInput) < 0.01f)
+        {
+            return;
+        }
+
+        var beforeError = Quaternion.Angle(beforeRotation, _targetRotation);
+        var afterError = Quaternion.Angle(afterRotation, _targetRotation);
+        if (beforeError < 0.1f && afterError < 0.1f)
+        {
+            return;
+        }
+
+        var deltaYaw = Mathf.DeltaAngle(beforeRotation.eulerAngles.y, afterRotation.eulerAngles.y);
+        if (Mathf.Abs(deltaYaw) < 0.01f)
+        {
+            return;
+        }
+        
+        if (afterError <= beforeError + 0.05f)
+        {
+            return;
+        }
+        
+        if (Time.time - _lastUnexpectedTurnLogTime < UnexpectedTurnLogCooldownSeconds)
+        {
+            return;
+        }
+
+        _lastUnexpectedTurnLogTime = Time.time;
+        Debug.LogWarning(
+            $"[UnexpectedTurnAwayFromTarget] expectedTurn={_expectedTurnInput:F2} deltaYaw={deltaYaw:F2} " +
+            $"beforeYaw={beforeRotation.eulerAngles.y:F2} afterYaw={afterRotation.eulerAngles.y:F2} " +
+            $"beforeError={beforeError:F2} afterError={afterError:F2} " +
+            $"current=({_currentPosition.x:F3},{_currentPosition.y:F3},{_currentPosition.z:F3}) " +
+            $"target=({_targetPosition.x:F3},{_targetPosition.y:F3},{_targetPosition.z:F3}) " +
+            $"correctionRot={_correctionRotationOffset.eulerAngles.y:F2}");
+    }
 }

Assets/Scripts/Player/MovementResolverComponent.cs

@@ -7,7 +7,8 @@ using Vector3 = UnityEngine.Vector3;
 public class MovementResolverComponent : MonoBehaviour
 {
     private const float ServerSimulationStepSeconds = 0.05f;
-    private const float SnapThreshold = 0.5f;
+    [SerializeField] private float SnapThreshold = 0.5f;
+    private const float TurnSpeedDegreesPerSecond = 180f;
 
     [SerializeField] private int _speed = 2;
     [SerializeField] private MovementComponent _movement;
@@ -54,7 +55,7 @@ public class MovementResolverComponent : MonoBehaviour
 
         if (_movement != null)
         {
-            _movement.Init(isControlled);
+            _movement.Init(isControlled, _speed, TurnSpeedDegreesPerSecond);
             _authoritativePosition = _movement.CurrentPosition;
             _authoritativeRotation = _movement.CurrentRotation;
             _predictedPosition = _movement.CurrentPosition;
@@ -118,14 +119,14 @@ public class MovementResolverComponent : MonoBehaviour
             _simulationAccumulator += Time.fixedDeltaTime;
             while (_simulationAccumulator >= ServerSimulationStepSeconds)
             {
-                var pendingCount = _predictionBuffer.PendingInputs.Count;
-                if (pendingCount == 0)
+                if (!_predictionBuffer.TryGetNextUnsimulatedInput(out var nextInput))
                 {
                     _simulationAccumulator = 0f;
                     break;
                 }
 
-                Simulate(GetLatestPredictedInput());
+                Simulate(nextInput.Input);
+                _predictionBuffer.MarkInputSimulated(nextInput.Input.Tick, ServerSimulationStepSeconds);
                 _simulationAccumulator -= ServerSimulationStepSeconds;
             }
 
@@ -139,12 +140,17 @@ public class MovementResolverComponent : MonoBehaviour
         }
     }
 
-    private void Simulate(Vector3 input)
+    private void Simulate(MoveInput moveInput)
     {
-        TankMovementKinematics.ApplyStep(_speed, input.x, input.z, ServerSimulationStepSeconds,
+        var simulationTurnInput = ToSimulationTurnInput(moveInput.TurnInput);
+        TankMovementKinematics.ApplyStep(
+            _speed,
+            simulationTurnInput,
+            moveInput.ThrottleInput,
+            ServerSimulationStepSeconds,
             ref _predictedPosition, ref _predictedRotation);
+        _movement.SetExpectedTurnInput(simulationTurnInput);
         _movement.SetTargetPose(_predictedPosition, _predictedRotation);
-        _predictionBuffer.AccumulateLatest(ServerSimulationStepSeconds);
 
         if (MainUI.Instance != null)
         {
@@ -186,13 +192,20 @@ public class MovementResolverComponent : MonoBehaviour
         ReplayPendingInputs(replayInputs);
 
         var error = Vector3.Distance(_movement.CurrentPosition, _predictedPosition);
-        if (error > SnapThreshold)
+        var shouldSnap = error > SnapThreshold;
+        Debug.Log(
+            $"[Reconcile] tick={snapshot.SourceState.Tick} ack={snapshot.AcknowledgedMoveTick} " +
+            $"error={error:F3} threshold={SnapThreshold:F3} snap={shouldSnap} " +
+            $"current=({_movement.CurrentPosition.x:F3},{_movement.CurrentPosition.y:F3},{_movement.CurrentPosition.z:F3}) " +
+            $"predicted=({_predictedPosition.x:F3},{_predictedPosition.y:F3},{_predictedPosition.z:F3}) " +
+            $"authoritative=({_authoritativePosition.x:F3},{_authoritativePosition.y:F3},{_authoritativePosition.z:F3})");
+        if (shouldSnap)
         {
             _movement.SnapToPose(_predictedPosition, _predictedRotation);
         }
         else
         {
-            _movement.SetTargetPose(_predictedPosition, _predictedRotation);
+            _movement.BlendToPoseFromCurrent(_predictedPosition, _predictedRotation);
         }
 
         _simulationAccumulator = 0f;
@@ -218,35 +231,41 @@ public class MovementResolverComponent : MonoBehaviour
         }
     }
 
-    private Vector3 GetLatestPredictedInput()
-    {
-        var pending = _predictionBuffer.PendingInputs;
-        if (pending.Count == 0)
-        {
-            return Vector3.zero;
-        }
-
-        var latest = pending[^1];
-        return new Vector3(-latest.Input.TurnInput, 0f, latest.Input.ThrottleInput);
-    }
-
     private void ReplayPendingInputs(IReadOnlyList<PredictedMoveStep> replayInputs)
     {
+        var lastSimulationTurnInput = 0f;
         foreach (var replayInput in replayInputs)
         {
             var remaining = replayInput.SimulatedDurationSeconds;
             while (remaining > 0f)
             {
                 var step = Mathf.Min(remaining, ServerSimulationStepSeconds);
+                var beforeYaw = _predictedRotation.eulerAngles.y;
+                var simulationTurnInput = ToSimulationTurnInput(replayInput.Input.TurnInput);
+                lastSimulationTurnInput = simulationTurnInput;
                 TankMovementKinematics.ApplyStep(
                     _speed,
-                    replayInput.Input.TurnInput,
+                    simulationTurnInput,
                     replayInput.Input.ThrottleInput,
                     step,
                     ref _predictedPosition,
                     ref _predictedRotation);
+                var afterYaw = _predictedRotation.eulerAngles.y;
+                Debug.Log(
+                    $"[ReplayStep] authTick={_lastAuthoritativeState?.SourceState?.Tick ?? 0} " +
+                    $"inputTick={replayInput.Input.Tick} netTurn={replayInput.Input.TurnInput:F2} simTurn={simulationTurnInput:F2} " +
+                    $"throttle={replayInput.Input.ThrottleInput:F2} step={step:F3} " +
+                    $"yaw={beforeYaw:F2}->{afterYaw:F2} " +
+                    $"predicted=({_predictedPosition.x:F3},{_predictedPosition.y:F3},{_predictedPosition.z:F3})");
                 remaining -= step;
             }
         }
+
+        _movement.SetExpectedTurnInput(lastSimulationTurnInput);
+    }
+
+    private static float ToSimulationTurnInput(float networkTurnInput)
+    {
+        return -networkTurnInput;
     }
 }

Assets/Tests/EditMode/Network/ClientGameplayFlowTests.cs

@@ -223,14 +223,23 @@ namespace Tests.EditMode.Network
                     TurnInput = 0f,
                     ThrottleInput = 1f
                 });
-                predictionBuffer.AccumulateLatest(0.1f);
+                predictionBuffer.Record(new MoveInput
+                {
+                    PlayerId = "player-1",
+                    Tick = 2,
+                    TurnInput = 0f,
+                    ThrottleInput = 1f
+                });
+                predictionBuffer.MarkInputSimulated(1, 0.05f);
+                predictionBuffer.MarkInputSimulated(2, 0.05f);
 
                 resolver.OnAuthoritativeState(new ClientAuthoritativePlayerStateSnapshot(
                     GameplayFlowTestSupport.CreatePlayerState("player-1", 1, Vector3.zero, acknowledgedMoveTick: 0)));
 
                 Assert.That(GetPrivateVector3(resolver, "_predictedPosition").z, Is.EqualTo(1f).Within(0.0001f));
-                Assert.That(predictionBuffer.PendingInputs.Count, Is.EqualTo(1));
+                Assert.That(predictionBuffer.PendingInputs.Count, Is.EqualTo(2));
                 Assert.That(predictionBuffer.PendingInputs[0].Input.Tick, Is.EqualTo(1));
+                Assert.That(predictionBuffer.PendingInputs[1].Input.Tick, Is.EqualTo(2));
             }
             finally
             {

Assets/Tests/EditMode/Network/SyncStrategyTests.cs

@@ -89,6 +89,7 @@ namespace Tests.EditMode.Network
             buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, ThrottleInput = 1f });
             buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 11, ThrottleInput = 1f });
             buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 12, ThrottleInput = 1f });
+            buffer.MarkInputSimulated(12, 0.05f);
 
             var accepted = buffer.TryApplyAuthoritativeState(
                 new PlayerState { PlayerId = "player-1", Tick = 11, AcknowledgedMoveTick = 11 },
@@ -100,10 +101,25 @@ namespace Tests.EditMode.Network
             Assert.That(buffer.LastAcknowledgedMoveTick, Is.EqualTo(11));
             Assert.That(replayInputs.Count, Is.EqualTo(1));
             Assert.That(replayInputs[0].Input.Tick, Is.EqualTo(12));
-            Assert.That(replayInputs[0].SimulatedDurationSeconds, Is.EqualTo(0f));
+            Assert.That(replayInputs[0].SimulatedDurationSeconds, Is.EqualTo(0.05f).Within(0.0001f));
             Assert.That(buffer.PendingInputs.Count, Is.EqualTo(1));
         }
 
+        [Test]
+        public void ClientPredictionBuffer_TryGetNextUnsimulatedInput_UsesOldestPendingMoveInput()
+        {
+            var buffer = new ClientPredictionBuffer();
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, ThrottleInput = 1f });
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 11, ThrottleInput = -1f });
+            buffer.MarkInputSimulated(10, 0.05f);
+
+            var found = buffer.TryGetNextUnsimulatedInput(out var nextInput);
+
+            Assert.That(found, Is.True);
+            Assert.That(nextInput.Input.Tick, Is.EqualTo(11));
+            Assert.That(nextInput.SimulatedDurationSeconds, Is.EqualTo(0f));
+        }
+
         [Test]
         public void ClientPredictionBuffer_StaleAuthoritativeState_IsIgnored()
         {
@@ -802,10 +818,16 @@ namespace Tests.EditMode.Network
             rotation = Quaternion.identity;
             for (var i = 0; i < steps; i++)
             {
-                TankMovementKinematics.ApplyStep(10, turnInput, throttleInput, stepDuration, ref position, ref rotation);
+                TankMovementKinematics.ApplyStep(10, ToSimulationTurnInput(turnInput), throttleInput, stepDuration,
+                    ref position, ref rotation);
             }
         }
 
+        private static float ToSimulationTurnInput(float networkTurnInput)
+        {
+            return -networkTurnInput;
+        }
+
         private static void ResetMovementState(Rigidbody rigidbody, Vector3 position, Quaternion rotation)
         {
             rigidbody.position = position;