Live patch refactor

leenkx/blender/lnx/handlers.py

@@ -68,9 +68,10 @@ def on_depsgraph_update_post(self):
     # Send last operator to Krom
     wrd = bpy.data.worlds['Lnx']
     if state.proc_play is not None and state.target == 'krom' and wrd.lnx_live_patch:
-        ops = bpy.context.window_manager.operators
-        if len(ops) > 0 and ops[-1] is not None:
-            live_patch.on_operator(ops[-1].bl_idname)
+        if not live_patch.on_depsgraph_update(depsgraph.updates):
+            ops = bpy.context.window_manager.operators
+            if len(ops) > 0 and ops[-1] is not None:
+                live_patch.on_operator(ops[-1].bl_idname)
 
     # Hacky solution to update leenkx props after operator executions.
     # bpy.context.active_operator doesn't always exist, in some cases

leenkx/blender/lnx/live_patch.py

@@ -32,6 +32,9 @@ else:
     __running = False
     """Whether live patch is currently active"""
 
+    scene_cache = {}
+    """Keys: (event_id, object_name) -> cached value tuple"""
+
 # Any object can act as a message bus owner
 msgbus_owner = object()
 
@@ -65,6 +68,62 @@ def stop():
         bpy.msgbus.clear_by_owner(msgbus_owner)
 
 
+def get_obj_transforms(obj):
+    loc = (round(obj.location.x, 6), round(obj.location.y, 6), round(obj.location.z, 6))
+    rot = obj.rotation_euler.to_quaternion()
+    rot = (round(rot.x, 6), round(rot.y, 6), round(rot.z, 6), round(rot.w, 6))
+    scale = (round(obj.scale.x, 6), round(obj.scale.y, 6), round(obj.scale.z, 6))
+    return loc, rot, scale
+
+
+def get_light_props(obj):
+    light = obj.data
+    color = (round(light.color[0], 6), round(light.color[1], 6), round(light.color[2], 6))
+    energy = round(light.energy, 6)
+    return color, energy
+
+DEPSGRAPH_HANDLERS = {
+    'is_updated_transform': [
+        ('obj_location', lambda obj: get_obj_transforms(obj)[0]),
+        ('obj_rotation', lambda obj: get_obj_transforms(obj)[1]),
+        ('obj_scale', lambda obj: get_obj_transforms(obj)[2]),
+    ],
+}
+
+
+def on_depsgraph_update(updates):
+    if not __running:
+        return False
+
+    changed = False
+
+    for update in updates:
+        uid = update.id
+
+        if isinstance(uid, bpy.types.Object):
+            name = uid.name
+
+            if update.is_updated_transform:
+                for event_id, extractor in DEPSGRAPH_HANDLERS['is_updated_transform']:
+                    current = extractor(uid)
+                    cache_key = (event_id, name)
+                    if current != scene_cache.get(cache_key):
+                        scene_cache[cache_key] = current
+                        send_event(event_id)
+                        changed = True
+
+            if update.is_updated_shading and isinstance(uid.data, bpy.types.Light):
+                color, energy = get_light_props(uid)
+                for event_id, current in (('light_color', color), ('light_energy', energy)):
+                    cache_key = (event_id, uid.data.name)
+                    if current != scene_cache.get(cache_key):
+                        scene_cache[cache_key] = current
+                        send_event(event_id)
+                        changed = True
+
+    return changed
+
+
 def patch_export():
     """Re-export the current scene and update the game accordingly."""
     if not __running or state.proc_build is not None: