Netcode Bootstrap

Assets/_Project/Scripts/Simulation/Player/PlayerMoveSystem.cs

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+using Unity.Burst;
+using Unity.Entities;
+using Unity.Mathematics;
+using Unity.NetCode;
+using Unity.Transforms;
+
+namespace ProjectM.Simulation
+{
+    /// <summary>
+    /// Canonical predicted system: advances each player's planar (XZ) position from twin-stick Move
+    /// input. Runs inside the prediction loop on the owning client (re-simulated on rollback) and
+    /// once per tick on the server; filtered to <see cref="Simulate"/> so only predicted ghosts move.
+    /// Deterministic by construction: uses <c>SystemAPI.Time.DeltaTime</c> (the fixed tick step)
+    /// only — no wall-clock, no <c>System.Random</c>. Move is clamped to unit length so diagonal
+    /// keyboard movement is not faster than cardinal.
+    /// </summary>
+    [UpdateInGroup(typeof(PredictedSimulationSystemGroup))]
+    [BurstCompile]
+    public partial struct PlayerMoveSystem : ISystem
+    {
+        [BurstCompile]
+        public void OnUpdate(ref SystemState state)
+        {
+            float dt = SystemAPI.Time.DeltaTime;
+
+            foreach (var (transform, input, stats) in
+                     SystemAPI.Query<RefRW<LocalTransform>, RefRO<PlayerInput>, RefRO<PlayerMoveStats>>()
+                         .WithAll<Simulate>())
+            {
+                float2 move = input.ValueRO.Move;
+                if (math.lengthsq(move) > 1f)
+                    move = math.normalize(move);
+
+                float3 delta = new float3(move.x, 0f, move.y) * stats.ValueRO.MoveSpeed * dt;
+                transform.ValueRW.Position += delta;
+            }
+        }
+    }
+}