Patch_2

leenkx/blender/lnx/handlers.py

@@ -37,6 +37,7 @@ else:
 _active_threads: Dict[threading.Thread, Callable] = {}
 _last_poll_time = 0.0
 _consecutive_empty_polls = 0
+_last_render_engine = None
 
 @persistent
 def on_depsgraph_update_post(self):
@@ -141,6 +142,43 @@ def always() -> float:
     return 0.5
 
 
+def check_render_engine() -> float:
+    global _last_render_engine
+    
+    try:
+        scene = None
+        if hasattr(bpy.context, 'scene') and bpy.context.scene is not None:
+            scene = bpy.context.scene
+        elif len(bpy.data.scenes) > 0:
+            scene = bpy.data.scenes[0]
+        
+        if scene is None:
+            return 1.0
+        
+        current_engine = scene.render.engine
+        
+        if _last_render_engine != current_engine:
+            if current_engine == 'KROM_VIEWPORT':
+                try:
+                    import lnx.make_world as make_world
+                    make_world.build()
+                except Exception as e:
+                    log.warn(f'World shader build failed: {e}')
+            
+            elif _last_render_engine == 'KROM_VIEWPORT':
+                try:
+                    make.stop_viewport()
+                except Exception as e:
+                    log.warn(f'Failed to stop viewport: {e}')
+            
+            _last_render_engine = current_engine
+    except Exception as e:
+        print(f"Engine Error: {e}")
+        import traceback
+        traceback.print_exc()
+    
+    return 0.5
+
 
 def poll_threads() -> float:
     """
@@ -389,6 +427,7 @@ def register():
 
     bpy.app.timers.register(always, persistent=True)
     bpy.app.timers.register(poll_threads, persistent=True)
+    bpy.app.timers.register(check_render_engine, persistent=True)
 
     if lnx.utils.get_fp() != '':
         # TODO: On windows, on_load_post is not called when opening .blend file from explorer
@@ -405,6 +444,7 @@ def register():
 def unregister():
     unload_py_libraries()
 
+    bpy.app.timers.unregister(check_render_engine)
     bpy.app.timers.unregister(poll_threads)
     bpy.app.timers.unregister(always)