refactor(animation): renamed instancexxx to scenexxx (ie InstanceAnimations & InstancePlayerLinks)

* moved temp scene prefix to new 'constants' file, updated code accordingly
 * fixed, updated & refactored handling of auto export & gltf parameters
 * added additional tests to changed_parameters
 * added display of changes since last save in new side tab
 * more investigation & fix attempts for change detection...
 * various related tweaks & cleanups

crates/bevy_gltf_blueprints/src/animation.rs

@@ -17,8 +17,8 @@ pub struct BlueprintAnimationPlayerLink(pub Entity);
 
 #[derive(Component, Reflect, Default, Debug)]
 #[reflect(Component)]
-/// storage for animations for a given entity (hierarchy), essentially a clone of gltf's `named_animations`
-pub struct InstanceAnimations {
+/// storage for scene level animations for a given entity (hierarchy), essentially a clone of gltf's `named_animations`
+pub struct SceneAnimations {
     pub named_animations: HashMap<String, Handle<AnimationClip>>,
 }
 
@@ -27,7 +27,7 @@ pub struct InstanceAnimations {
 /// so that the root entity knows which of its children contains an actualy `AnimationPlayer` component
 /// this is for convenience, because currently , Bevy's gltf parsing inserts `AnimationPlayers` "one level down"
 /// ie armature/root for animated models, which means more complex queries to trigger animations that we want to avoid
-pub struct InstanceAnimationPlayerLink(pub Entity);
+pub struct SceneAnimationPlayerLink(pub Entity);
 
 /// Stores Animation information: name, frame informations etc
 #[derive(Reflect, Default, Debug)]
@@ -78,8 +78,8 @@ pub fn trigger_instance_animation_markers_events(
     animation_infos: Query<(
         Entity,
         &AnimationMarkers,
-        &InstanceAnimationPlayerLink,
-        &InstanceAnimations,
+        &SceneAnimationPlayerLink,
+        &SceneAnimations,
         &AnimationInfos,
     )>,
     animation_players: Query<&AnimationPlayer>,

crates/bevy_gltf_blueprints/src/lib.rs

@@ -120,7 +120,7 @@ impl Plugin for BlueprintsPlugin {
         .register_type::<MaterialInfo>()
         .register_type::<SpawnHere>()
         .register_type::<BlueprintAnimations>()
-        .register_type::<InstanceAnimations>()
+        .register_type::<SceneAnimations>()
         .register_type::<AnimationInfo>()
         .register_type::<AnimationInfos>()
         .register_type::<Vec<AnimationInfo>>()

testing/bevy_example/assets/registry.json

@@ -3676,7 +3676,7 @@
       "type": "object",
       "typeInfo": "Struct"
     },
-    "bevy_gltf_blueprints::animation::InstanceAnimations": {
+    "bevy_gltf_blueprints::animation::SceneAnimations": {
       "additionalProperties": false,
       "isComponent": true,
       "isResource": false,
@@ -3690,8 +3690,8 @@
       "required": [
         "named_animations"
       ],
-      "short_name": "InstanceAnimations",
-      "title": "bevy_gltf_blueprints::animation::InstanceAnimations",
+      "short_name": "SceneAnimations",
+      "title": "bevy_gltf_blueprints::animation::SceneAnimations",
       "type": "object",
       "typeInfo": "Struct"
     },

testing/bevy_example/src/game/animation.rs

@@ -2,7 +2,7 @@ use std::time::Duration;
 
 use bevy_gltf_blueprints::{
     AnimationInfos, AnimationMarkerReached, BlueprintAnimationPlayerLink, BlueprintAnimations,
-    InstanceAnimationPlayerLink, InstanceAnimations,
+    SceneAnimationPlayerLink, SceneAnimations,
 };
 
 use bevy::{gltf::Gltf, prelude::*};
@@ -58,7 +58,7 @@ pub fn animations(
                 name, entity
             );
             println!("Found match {:?}", gltf.named_animations);
-            commands.entity(entity).insert(InstanceAnimations {
+            commands.entity(entity).insert(SceneAnimations {
                 named_animations: gltf.named_animations.clone(),
             });
             for ancestor in parents.iter_ancestors(entity) {
@@ -66,7 +66,7 @@ pub fn animations(
                     // println!("found match with animationPlayer !! {:?}",names.get(ancestor));
                     commands
                         .entity(entity)
-                        .insert(InstanceAnimationPlayerLink(ancestor));
+                        .insert(SceneAnimationPlayerLink(ancestor));
                 }
                 // info!("{:?} is an ancestor of {:?}", ancestor, player);
             }
@@ -77,17 +77,17 @@ pub fn animations(
 
 pub fn play_animations(
     animated_marker1: Query<
-        (&InstanceAnimationPlayerLink, &InstanceAnimations),
+        (&SceneAnimationPlayerLink, &SceneAnimations),
         (With<AnimationInfos>, With<Marker1>),
     >,
     animated_marker2: Query<
-        (&InstanceAnimationPlayerLink, &InstanceAnimations),
+        (&SceneAnimationPlayerLink, &SceneAnimations),
         (With<AnimationInfos>, With<Marker2>),
     >,
     animated_marker3: Query<
         (
-            &InstanceAnimationPlayerLink,
-            &InstanceAnimations,
+            &SceneAnimationPlayerLink,
+            &SceneAnimations,
             &BlueprintAnimationPlayerLink,
             &BlueprintAnimations,
         ),

tools/gltf_auto_export/auto_export/auto_export.py

@@ -5,6 +5,7 @@ import traceback
 
 from .export_main_scenes import export_main_scene
 from .export_blueprints import check_if_blueprint_on_disk, check_if_blueprints_exist, export_blueprints_from_collections
+from .get_standard_exporter_settings import get_standard_exporter_settings
 
 from ..helpers.helpers_scenes import (get_scenes, )
 from ..helpers.helpers_collections import (get_collections_in_library, get_exportable_collections, get_collections_per_scene, find_collection_ascendant_target_collection)
@@ -34,9 +35,8 @@ def auto_export(changes_per_scene, changed_export_parameters, addon_prefs):
         [main_scene_names, level_scenes, library_scene_names, library_scenes] = get_scenes(addon_prefs)
 
         # standard gltf export settings are stored differently
-        standard_gltf_exporter_settings = bpy.data.texts[".gltf_auto_export_gltf_settings"] if ".gltf_auto_export_gltf_settings" in bpy.data.texts else bpy.data.texts.new(".gltf_auto_export_gltf_settings")
-        print("standard_gltf_exporter_settings", standard_gltf_exporter_settings.as_string())
-        standard_gltf_exporter_settings = json.loads(standard_gltf_exporter_settings.as_string())
+        
+        standard_gltf_exporter_settings = get_standard_exporter_settings()
 
         print("main scenes", main_scene_names, "library_scenes", library_scene_names)
         print("export_output_folder", export_output_folder)

tools/gltf_auto_export/auto_export/export_blueprints.py

@@ -1,6 +1,7 @@
 import os
 import bpy
 
+from ..constants import TEMPSCENE_PREFIX
 from ..helpers.generate_and_export import generate_and_export
 from .export_gltf import (generate_gltf_export_preferences)
 from ..helpers.helpers_scenes import clear_hollow_scene, copy_hollowed_collection_into
@@ -24,7 +25,7 @@ def export_collections(collections, folder_path, library_scene, addon_prefs, glt
         collection = bpy.data.collections[collection_name]
         generate_and_export(
             addon_prefs, 
-            temp_scene_name="__temp_scene_"+collection.name,
+            temp_scene_name=TEMPSCENE_PREFIX+collection.name,
             export_settings=export_settings,
             gltf_output_path=gltf_output_path,
             tempScene_filler= lambda temp_collection: copy_hollowed_collection_into(collection, temp_collection, library_collections=library_collections, addon_prefs=addon_prefs),

tools/gltf_auto_export/auto_export/export_gltf.py

@@ -2,6 +2,7 @@ import json
 import os
 import bpy
 
+from .get_standard_exporter_settings import get_standard_exporter_settings
 from .preferences import (AutoExportGltfPreferenceNames)
 
 def generate_gltf_export_preferences(addon_prefs): 
@@ -48,9 +49,7 @@ def generate_gltf_export_preferences(addon_prefs):
             gltf_export_preferences[key] = getattr(addon_prefs, key)
 
 
-    standard_gltf_exporter_settings = bpy.data.texts[".gltf_auto_export_gltf_settings"] if ".gltf_auto_export_gltf_settings" in bpy.data.texts else bpy.data.texts.new(".gltf_auto_export_gltf_settings")
-    standard_gltf_exporter_settings = json.loads(standard_gltf_exporter_settings.as_string())
-    """standard_gltf_exporter_settings = get_standard_exporter_settings()"""
+    standard_gltf_exporter_settings = get_standard_exporter_settings()
     #print("standard settings", standard_gltf_exporter_settings)
     
     constant_keys = [

tools/gltf_auto_export/auto_export/export_main_scenes.py

@@ -1,6 +1,7 @@
 import os
 import bpy
 
+from ..constants import TEMPSCENE_PREFIX
 from ..helpers.generate_and_export import generate_and_export
 from .export_gltf import (generate_gltf_export_preferences, export_gltf)
 from ..modules.bevy_dynamic import is_object_dynamic, is_object_static
@@ -38,7 +39,7 @@ def export_main_scene(scene, folder_path, addon_prefs, library_collections):
             # first export static objects
             generate_and_export(
                 addon_prefs, 
-                temp_scene_name="__temp_scene",
+                temp_scene_name=TEMPSCENE_PREFIX,
                 export_settings=export_settings,
                 gltf_output_path=gltf_output_path,
                 tempScene_filler= lambda temp_collection: copy_hollowed_collection_into(scene.collection, temp_collection, library_collections=library_collections, filter=is_object_static, addon_prefs=addon_prefs),
@@ -49,7 +50,7 @@ def export_main_scene(scene, folder_path, addon_prefs, library_collections):
             gltf_output_path = os.path.join(folder_path, export_output_folder, scene.name+ "_dynamic")
             generate_and_export(
                 addon_prefs, 
-                temp_scene_name="__temp_scene",
+                temp_scene_name=TEMPSCENE_PREFIX,
                 export_settings=export_settings,
                 gltf_output_path=gltf_output_path,
                 tempScene_filler= lambda temp_collection: copy_hollowed_collection_into(scene.collection, temp_collection, library_collections=library_collections, filter=is_object_dynamic, addon_prefs=addon_prefs),
@@ -60,7 +61,7 @@ def export_main_scene(scene, folder_path, addon_prefs, library_collections):
             #print("NO SPLIT")
             generate_and_export(
                 addon_prefs, 
-                temp_scene_name="__temp_scene",
+                temp_scene_name=TEMPSCENE_PREFIX,
                 export_settings=export_settings,
                 gltf_output_path=gltf_output_path,
                 tempScene_filler= lambda temp_collection: copy_hollowed_collection_into(scene.collection, temp_collection, library_collections=library_collections, addon_prefs=addon_prefs),

tools/gltf_auto_export/auto_export/get_standard_exporter_settings.py

@@ -0,0 +1,14 @@
+import bpy
+import json
+
+def get_standard_exporter_settings():
+    standard_gltf_exporter_settings = bpy.data.texts[".gltf_auto_export_gltf_settings"] if ".gltf_auto_export_gltf_settings" in bpy.data.texts else None
+    if standard_gltf_exporter_settings != None:
+        try:
+            standard_gltf_exporter_settings = json.loads(standard_gltf_exporter_settings.as_string())
+        except:
+            standard_gltf_exporter_settings = {}
+    else:
+        standard_gltf_exporter_settings = {}
+    
+    return standard_gltf_exporter_settings

tools/gltf_auto_export/auto_export/operators.py

@@ -46,7 +46,6 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
         
         bpy.types.WindowManager.main_scenes_list_index = IntProperty(name = "Index for main scenes list", default = 0)
         bpy.types.WindowManager.library_scenes_list_index = IntProperty(name = "Index for library scenes list", default = 0)
-        bpy.types.WindowManager.previous_export_settings = StringProperty(default="")
 
         cls.main_scenes_index = 0
         cls.library_scenes_index = 0
@@ -59,8 +58,6 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
         del bpy.types.WindowManager.main_scenes_list_index
         del bpy.types.WindowManager.library_scenes_list_index
 
-        del bpy.types.WindowManager.previous_export_settings
-
     def is_scene_ok(self, scene):
         try:
             operator = bpy.context.space_data.active_operator
@@ -161,9 +158,20 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
         
         # if there were no setting before, it is new, we need export
         changed = False
-        if previous_auto_settings == None or previous_gltf_settings == None:
+        print("previous_auto_settings", previous_auto_settings, "previous_gltf_settings", previous_gltf_settings)
+        if previous_auto_settings == None:
             print("previous settings missing, exporting")
             changed = True
+        elif previous_gltf_settings == None:
+            print("previous gltf settings missing, exporting")
+            previous_gltf_settings = bpy.data.texts.new(".gltf_auto_export_gltf_settings_previous")
+            previous_gltf_settings.write(json.dumps({}))
+            if current_gltf_settings == None:
+                current_gltf_settings = bpy.data.texts[".gltf_auto_export_gltf_settings"]
+                current_gltf_settings.write(json.dumps({}))
+
+            changed = True
+
         else:
             auto_settings_changed = sorted(json.loads(previous_auto_settings.as_string()).items()) != sorted(json.loads(current_auto_settings.as_string()).items()) if current_auto_settings != None else False
             gltf_settings_changed = sorted(json.loads(previous_gltf_settings.as_string()).items()) != sorted(json.loads(current_gltf_settings.as_string()).items()) if current_gltf_settings != None else False
@@ -192,7 +200,6 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
 
     def execute(self, context):    
         print("execute")
-        # disable change detection while the operator runs
         bpy.context.window_manager.auto_export_tracker.disable_change_detection()
         if self.direct_mode:
             self.load_settings(context)
@@ -203,6 +210,8 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
         if self.auto_export: # only do the actual exporting if auto export is actually enabled
             #& do the export
             if self.direct_mode: #Do not auto export when applying settings in the menu, do it on save only
+                # disable change detection while the operator runs
+                
                 #determine changed parameters 
                 params_changed = self.did_export_settings_change()
                 auto_export(changes_per_scene, params_changed, self)
@@ -217,14 +226,21 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
             #bpy.app.timers.register(bpy.context.window_manager.auto_export_tracker.enable_change_detection, first_interval=1)
         else: 
             print("auto export disabled, skipping")
+
+        """if not self.direct_mode:
+            print("enabling")
+            bpy.context.window_manager.auto_export_tracker.enable_change_detection()"""
+        bpy.app.timers.register(bpy.context.window_manager.auto_export_tracker.enable_change_detection, first_interval=1)
+
         return {'FINISHED'}    
     
     def invoke(self, context, event):
+        print("invoke")
         bpy.context.window_manager.auto_export_tracker.disable_change_detection()
         self.load_settings(context)
 
         addon_prefs = self
-        [main_scene_names, level_scenes, library_scene_names, library_scenes]=get_scenes(addon_prefs)
+        """[main_scene_names, level_scenes, library_scene_names, library_scenes]=get_scenes(addon_prefs)
         (collections, _) = get_exportable_collections(level_scenes, library_scenes, addon_prefs)
 
         try:
@@ -235,15 +251,20 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
                 ui_info = bpy.context.window_manager.exportedCollections.add()
                 ui_info.name = collection_name
         except Exception as error:
-            self.report({"ERROR"}, "Failed to populate list of exported collections/blueprints")
+            self.report({"ERROR"}, "Failed to populate list of exported collections/blueprints")"""
      
         wm = context.window_manager
         wm.fileselect_add(self)
 
+        
+
         return {'RUNNING_MODAL'}
     
     def draw(self, context):
         pass
 
     def cancel(self, context):
+        print("cancel")
+        #bpy.context.window_manager.auto_export_tracker.enable_change_detection()
         bpy.app.timers.register(bpy.context.window_manager.auto_export_tracker.enable_change_detection, first_interval=1)
+

tools/gltf_auto_export/auto_export/tracker.py

@@ -1,8 +1,9 @@
 import json
 import bpy
 from bpy.types import (PropertyGroup)
-from bpy.props import (PointerProperty, IntProperty)
+from bpy.props import (PointerProperty, IntProperty, StringProperty)
 
+from ..constants import TEMPSCENE_PREFIX
 from .internals import CollectionsToExport
 
 class AutoExportTracker(PropertyGroup):
@@ -21,6 +22,8 @@ class AutoExportTracker(PropertyGroup):
         default=0
     ) # type: ignore
 
+   
+
     @classmethod
     def register(cls):
         bpy.types.WindowManager.auto_export_tracker = PointerProperty(type=AutoExportTracker)
@@ -59,10 +62,15 @@ class AutoExportTracker(PropertyGroup):
 
     @classmethod
     def deps_update_handler(cls, scene, depsgraph):
-        print("change detection enabled", cls.change_detection_enabled, bpy.context.window_manager.auto_export_tracker.change_detection_enabled)
+        print("change detection enabled", cls.change_detection_enabled)
+
+        ops = bpy.context.window_manager.operators
+        print("last operators", ops)
+        for op in ops:
+            print("operator", op)
         active_operator = bpy.context.active_operator
         if active_operator:
-            # print("Operator", active_operator.bl_label, active_operator.bl_idname)
+            print("Operator", active_operator.bl_label, active_operator.bl_idname)
             if active_operator.bl_idname == "EXPORT_SCENE_OT_gltf" and active_operator.gltf_export_id == "gltf_auto_export":
                 # we backup any existing gltf export settings, if there were any
                 scene = bpy.context.scene
@@ -80,19 +88,21 @@ class AutoExportTracker(PropertyGroup):
                 active_operator.will_save_settings = True
                 active_operator.auto_export = True
 
-        if not scene.name.startswith("__temp_scene"):
+        # only deal with changes if we are NOT in the mids of saving/exporting
+        if cls.change_detection_enabled:
+            # ignore anything going on with temporary scenes
+            if not scene.name.startswith(TEMPSCENE_PREFIX):
                 print("depsgraph_update_post", scene.name)
                 changed_scene = scene.name or ""
 
-            # only deal with changes if we are no in the mids of saving/exporting
-            if cls.change_detection_enabled:
+            
                 #print("-------------")
                 if not changed_scene in cls.changed_objects_per_scene:
                     cls.changed_objects_per_scene[changed_scene] = {}
-
-                # depsgraph = bpy.context.evaluated_depsgraph_get()
+                print("cls.changed_objects_per_scene", cls.changed_objects_per_scene)
+                depsgraph = bpy.context.evaluated_depsgraph_get()
                 for obj in depsgraph.updates:
-                    # print("depsgraph update", obj)
+                    print("depsgraph update", obj)
                     if isinstance(obj.id, bpy.types.Object):
                         # get the actual object
                         object = bpy.data.objects[obj.id.name]
@@ -100,7 +110,7 @@ class AutoExportTracker(PropertyGroup):
                         print("FOO","transforms", obj.is_updated_transform, "geometry", obj.is_updated_geometry)
                         cls.changed_objects_per_scene[scene.name][obj.id.name] = object
                     elif isinstance(obj.id, bpy.types.Material): # or isinstance(obj.id, bpy.types.ShaderNodeTree):
-                        # print("changed material", obj.id, "scene", scene.name,)
+                        print("changed material", obj.id, "scene", scene.name,)
                         material = bpy.data.materials[obj.id.name]
                         #now find which objects are using the material
                         for obj in bpy.data.objects:
@@ -113,7 +123,7 @@ class AutoExportTracker(PropertyGroup):
                     items += len(cls.changed_objects_per_scene[scene_name].keys())
                 if items == 0:
                     cls.changed_objects_per_scene.clear()
-                #print("changed_objects_per_scene", cls.changed_objects_per_scene)
+                print("changed_objects_per_scene", cls.changed_objects_per_scene)
         else:
             cls.changed_objects_per_scene.clear()
             
@@ -125,13 +135,15 @@ class AutoExportTracker(PropertyGroup):
         print("disable change detection")
         self.change_detection_enabled = False
         self.__class__.change_detection_enabled = False
-
         return None
     
     def enable_change_detection(self):
         print("enable change detection")
         self.change_detection_enabled = True
         self.__class__.change_detection_enabled = True
+        #FIXME: not sure about these
+        self.changed_objects_per_scene.clear()
+        self.__class__.changed_objects_per_scene.clear()
         # bpy.context.window_manager.auto_export_tracker.change_detection_enabled = True
         print("bpy.context.window_manager.auto_export_tracker.change_detection_enabled", bpy.context.window_manager.auto_export_tracker.change_detection_enabled)
         return None

tools/gltf_auto_export/constants.py

@@ -0,0 +1 @@
+TEMPSCENE_PREFIX = "__temp_scene"

tools/gltf_auto_export/tests/test_change_tracking.py

@@ -195,11 +195,12 @@ def test_export_changed_parameters(setup_data):
 
     # now same, but move the cube in the library
     print("----------------")
-    print("library change")
+    print("library change (blueprint) ")
     print("----------------")
     bpy.context.window_manager.auto_export_tracker.enable_change_detection() # FIXME: should not be needed, but ..
 
     bpy.data.objects["Blueprint1_mesh"].location = [1, 2, 1]
+
     auto_export_operator(
         auto_export=True,
         direct_mode=True,
@@ -212,17 +213,55 @@ def test_export_changed_parameters(setup_data):
 
     modification_times = list(map(lambda file_path: os.path.getmtime(file_path), model_library_file_paths + [world_file_path]))
     assert modification_times != modification_times_first
-    # only the "world" file should have changed
+    # the "world" file should have changed (TODO: double check: this is since changing an instances collection changes the instance too ?)
+    world_file_index = mapped_files_to_timestamps_and_index["World"][1]
+    # and the blueprint1 file too, since that is the collection we changed
     blueprint1_file_index = mapped_files_to_timestamps_and_index["Blueprint1"][1]
-    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [blueprint1_file_index]]
-    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [blueprint1_file_index]]
+    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [world_file_index, blueprint1_file_index]]
+    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [world_file_index, blueprint1_file_index]]
 
+    assert modification_times[world_file_index] != modification_times_first[world_file_index]
     assert modification_times[blueprint1_file_index] != modification_times_first[blueprint1_file_index]
     assert other_files_modification_times == other_files_modification_times_first
     # reset the comparing 
     modification_times_first = modification_times
 
 
+    # now change something in a nested blueprint
+    print("----------------")
+    print("library change (nested blueprint) ")
+    print("----------------")
+    bpy.context.window_manager.auto_export_tracker.enable_change_detection() # FIXME: should not be needed, but ..
+
+    bpy.data.objects["Blueprint3_mesh"]["test_component"] = 42
+
+    auto_export_operator(
+        auto_export=True,
+        direct_mode=True,
+        export_output_folder="./models",
+        export_scene_settings=True,
+        export_blueprints=True,
+        export_legacy_mode=False,
+        export_materials_library=False
+    )
+
+    modification_times = list(map(lambda file_path: os.path.getmtime(file_path), model_library_file_paths + [world_file_path]))
+    assert modification_times != modification_times_first
+    # the "world" file should have changed (TODO: double check: this is since changing an instances collection changes the instance too ?)
+    world_file_index = mapped_files_to_timestamps_and_index["World"][1]
+    # and the blueprint1 file too, since that is the collection we changed
+    blueprint1_file_index = mapped_files_to_timestamps_and_index["Blueprint1"][1]
+    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [world_file_index, blueprint1_file_index]]
+    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [world_file_index, blueprint1_file_index]]
+
+    assert modification_times[world_file_index] != modification_times_first[world_file_index]
+    assert modification_times[blueprint1_file_index] != modification_times_first[blueprint1_file_index]
+    assert other_files_modification_times == other_files_modification_times_first
+    # reset the comparing 
+    modification_times_first = modification_times
+
+
+    
 
     # now same, but using an operator
     print("----------------")

tools/gltf_auto_export/tests/test_changed_parameters.py

@@ -47,8 +47,28 @@ def setup_data(request):
 - checks if timestamps have changed
 - if all worked => test is a-ok
 - removes generated files
-
 """
+
+
+def test_export_no_parameters(setup_data):
+    root_path = "../../testing/bevy_example"
+    assets_root_path = os.path.join(root_path, "assets")
+    models_path = os.path.join(assets_root_path, "models")
+    auto_export_operator = bpy.ops.export_scenes.auto_gltf
+
+
+    # first test exporting withouth any parameters set, this should export with default parameters gracefully
+    
+    auto_export_operator(
+        auto_export=True,
+        direct_mode=True,
+        export_output_folder="./models",
+        export_legacy_mode=False,
+        export_materials_library=True
+    )
+
+
+
 def test_export_changed_parameters(setup_data):
     root_path = "../../testing/bevy_example"
     assets_root_path = os.path.join(root_path, "assets")
@@ -77,11 +97,6 @@ def test_export_changed_parameters(setup_data):
     stored_gltf_settings.clear()
     stored_gltf_settings.write(json.dumps(gltf_settings))
 
-    # move the main cube
-    bpy.data.objects["Cube"].location = [1, 0, 0]
-    # move the cube in the library
-    bpy.data.objects["Blueprint1_mesh"].location = [1, 2, 1]
-
     auto_export_operator(
         auto_export=True,
         direct_mode=True,

tools/gltf_auto_export/todo.md

@@ -0,0 +1,4 @@
+- investigate remove_blueprints_list_from_main_scene (could be a case of changes to bpy.data not being applied immediatly)
+- investigate clearing of changed_objects_per_scene
+- it seems bevy_components does not trigger updates
+- undo redo is ignored: ie save, do something, undo it, you still get changes

tools/gltf_auto_export/ui/main.py

@@ -48,6 +48,15 @@ class GLTF_PT_auto_export_SidePanel(bpy.types.Panel):
 
         op = layout.operator("EXPORT_SCENES_OT_auto_gltf", text="Auto Export Settings")
         op.auto_export = True
+
+        layout.label(text="changes since last save:")
+        changed_objects_per_scene = {}
+        for scene in context.window_manager.auto_export_tracker.changed_objects_per_scene:
+            if not scene in changed_objects_per_scene.keys():
+                changed_objects_per_scene[scene] = []
+            changed_objects_per_scene[scene]+= context.window_manager.auto_export_tracker.changed_objects_per_scene[scene].keys()
+            
+        layout.label(text=str(changed_objects_per_scene))
         #print("GLTF_PT_export_main", GLTF_PT_export_main.bl_parent_id)
 
 # main ui in the file => export