reload map when map was modified

Source/Game/Level/LevelScript.cs

@@ -0,0 +1,12 @@
+using System;
+using FlaxEngine;
+using FlaxEditor;
+
+namespace Game
+{
+    [ExecuteInEditMode]
+    public class LevelScript : Script
+    {
+        public DateTime MapTimestamp;
+    }
+}

Source/Game/Level/Q3MapImporter.cs

@@ -335,11 +335,18 @@ namespace Game
             worldSpawnActor = Actor.FindActor("WorldSpawn");
             if (worldSpawnActor != null)
             {
-                if (forceLoad)
+#if FLAX_EDITOR
+                LevelScript levelScript = worldSpawnActor.GetScript<LevelScript>();
+                DateTime timestamp = File.GetLastWriteTime(mapPath);
+                if (timestamp != levelScript.MapTimestamp)
                 {
-                    FlaxEngine.Debug.Log("Destroying children");
+                    FlaxEngine.Debug.Log($"Map dirty, reloading. {timestamp.ToString()} != {levelScript.MapTimestamp.ToString()}");
-                    worldSpawnActor.DestroyChildren();
+                    forceLoad = true;
+                    levelScript.MapTimestamp = timestamp;
                 }
+#endif
+                if (forceLoad)
+                    worldSpawnActor.DestroyChildren();
                 else
                 {
                     FlaxEngine.Debug.Log("Map already loaded in the scene");
@@ -348,7 +355,9 @@ namespace Game
                 }
             }
             else
-                FlaxEngine.Debug.Log("Loading map");
+                FlaxEngine.Debug.Log("No WorldSpawn, loading map");
+
+            FlaxEngine.Debug.Log("Loading map");
 
             {
                 string matBasePath = Path.Combine(AssetManager.ContentPath, "Materials");
@@ -372,7 +381,13 @@ namespace Game
             {
                 worldSpawnActor = Actor.AddChild<Actor>();
                 worldSpawnActor.Name = "WorldSpawn";
-                worldSpawnActor.HideFlags |= HideFlags.DontSave;
+
+                LevelScript levelScript = worldSpawnActor.AddScript<LevelScript>();
+#if FLAX_EDITOR
+                levelScript.MapTimestamp = File.GetLastWriteTime(mapPath);
+#endif
+                worldSpawnActor.HideFlags &= ~HideFlags.DontSave;
+                //worldSpawnActor.HideFlags |= HideFlags.DontSave;
                 //worldSpawnActor.HideFlags |= HideFlags.DontSelect;
             }