Mirror intergrated, WIP on Client Prediction v1

Assets/Mirror/Examples/AdditiveLevels/Scripts/PhysicsSimulator.cs

@@ -0,0 +1,40 @@
+using UnityEngine;
+
+namespace Mirror.Examples.AdditiveLevels
+{
+    public class PhysicsSimulator : MonoBehaviour
+    {
+        PhysicsScene physicsScene;
+        PhysicsScene2D physicsScene2D;
+
+        bool simulatePhysicsScene;
+        bool simulatePhysicsScene2D;
+
+        void Awake()
+        {
+            if (NetworkServer.active)
+            {
+                physicsScene = gameObject.scene.GetPhysicsScene();
+                simulatePhysicsScene = physicsScene.IsValid() && physicsScene != Physics.defaultPhysicsScene;
+
+                physicsScene2D = gameObject.scene.GetPhysicsScene2D();
+                simulatePhysicsScene2D = physicsScene2D.IsValid() && physicsScene2D != Physics2D.defaultPhysicsScene;
+            }
+            else
+            {
+                enabled = false;
+            }
+        }
+
+        void FixedUpdate()
+        {
+            if (!NetworkServer.active) return;
+
+            if (simulatePhysicsScene)
+                physicsScene.Simulate(Time.fixedDeltaTime);
+
+            if (simulatePhysicsScene2D)
+                physicsScene2D.Simulate(Time.fixedDeltaTime);
+        }
+    }
+}