From 3b6b5686d0e960d98d475a656fd9940a1ae02b01 Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@kapsi.fi>
Date: Sun, 12 Jun 2022 19:51:32 +0300
Subject: [PATCH] reload map when map was modified

---
 Source/Game/Level/LevelScript.cs   | 12 ++++++++++++
 Source/Game/Level/Q3MapImporter.cs | 25 ++++++++++++++++++++-----
 2 files changed, 32 insertions(+), 5 deletions(-)
 create mode 100644 Source/Game/Level/LevelScript.cs

diff --git a/Source/Game/Level/LevelScript.cs b/Source/Game/Level/LevelScript.cs
new file mode 100644
index 0000000..c75837d
--- /dev/null
+++ b/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;
+    }
+}
\ No newline at end of file
diff --git a/Source/Game/Level/Q3MapImporter.cs b/Source/Game/Level/Q3MapImporter.cs
index e822b25..3f5b207 100644
--- a/Source/Game/Level/Q3MapImporter.cs
+++ b/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");
-                    worldSpawnActor.DestroyChildren();
+                    FlaxEngine.Debug.Log($"Map dirty, reloading. {timestamp.ToString()} != {levelScript.MapTimestamp.ToString()}");
+                    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;
             }