Merge a001ee21f6 into 9f21df035b

crates/bevy_gltf_blueprints/src/animation.rs

@@ -14,3 +14,7 @@ pub struct Animations {
 /// 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 AnimationPlayerLink(pub Entity);
+
+#[derive(Component, Reflect, Default, Debug)]
+#[reflect(Component)]
+pub struct Animated;

crates/bevy_gltf_blueprints/src/lib.rs

@@ -120,6 +120,7 @@ impl Plugin for BlueprintsPlugin {
         .register_type::<MaterialInfo>()
         .register_type::<SpawnHere>()
         .register_type::<Animations>()
+        .register_type::<Animated>()
         .register_type::<BlueprintsList>()
         .register_type::<Vec<String>>()
         .register_type::<HashMap<String, Vec<String>>>()

testing/bevy_example/Cargo.toml

@@ -14,3 +14,4 @@ bevy_rapier3d = { version = "0.25.0", features = ["serde-serialize", "debug-rend
 bevy_asset_loader = { version = "0.20", features = ["standard_dynamic_assets"] }
 bevy_editor_pls = { version = "0.8" }
 rand = "0.8.5"
+json-writer ="0.3"

testing/bevy_example/assets/registry.json

@@ -3516,6 +3516,17 @@
       "type": "object",
       "typeInfo": "Struct"
     },
+    "bevy_gltf_blueprints::animation::Animated": {
+      "additionalProperties": false,
+      "isComponent": true,
+      "isResource": false,
+      "properties": {},
+      "required": [],
+      "short_name": "Animated",
+      "title": "bevy_gltf_blueprints::animation::Animated",
+      "type": "object",
+      "typeInfo": "Struct"
+    },
     "bevy_gltf_blueprints::animation::Animations": {
       "additionalProperties": false,
       "isComponent": true,

testing/bevy_example/src/game/mod.rs

@@ -1,24 +1,30 @@
 pub mod in_game;
 use std::{
-    fs::{self},
+    collections::HashMap, fs, time::Duration
-    time::Duration,
 };
 
-use bevy_gltf_blueprints::{AnimationPlayerLink, BlueprintName, BlueprintsList};
+use bevy_gltf_blueprints::{AnimationPlayerLink, Animations, BlueprintName, BlueprintsList};
 pub use in_game::*;
 
 use bevy::{
-    prelude::*, render::view::screenshot::ScreenshotManager, time::common_conditions::on_timer,
+    ecs::query, prelude::*, render::view::screenshot::ScreenshotManager, time::common_conditions::on_timer, window::PrimaryWindow
-    window::PrimaryWindow,
 };
 use bevy_gltf_worlflow_examples_common_rapier::{AppState, GameState};
 
 use crate::{TupleTestF32, UnitTest};
+use json_writer::to_json_string;
 
 fn start_game(mut next_app_state: ResMut<NextState<AppState>>) {
     next_app_state.set(AppState::AppLoading);
 }
 
+
+#[derive(Debug)]
+struct Node {
+    value: String,
+    children: Vec<String>,
+}
+
 // if the export from Blender worked correctly, we should have animations (simplified here by using AnimationPlayerLink)
 // if the export from Blender worked correctly, we should have an Entity called "Cylinder" that has two components: UnitTest, TupleTestF32
 // if the export from Blender worked correctly, we should have an Entity called "Blueprint4_nested" that has a child called "Blueprint3" that has a "BlueprintName" component with value Blueprint3
@@ -34,19 +40,10 @@ fn validate_export(
     empties_candidates: Query<(Entity, &Name, &GlobalTransform)>,
 
     blueprints_list: Query<(Entity, &BlueprintsList)>,
+    root: Query<(Entity, &Name, &Children), (Without<Parent>, With<Children>)>
 ) {
     let animations_found = !animation_player_links.is_empty();
 
-    let mut cylinder_found = false;
-    if let Ok(nested_cylinder) = exported_cylinder.get_single() {
-        let parent_name = names
-            .get(parents.get(nested_cylinder.0).unwrap().get())
-            .unwrap();
-        cylinder_found = parent_name.to_string() == *"Cube.001"
-            && nested_cylinder.1.to_string() == *"Cylinder"
-            && nested_cylinder.3 .0 == 75.1;
-    }
-
     let mut nested_blueprint_found = false;
     for (entity, name, blueprint_name) in blueprints.iter() {
         if name.to_string() == *"Blueprint4_nested" && blueprint_name.0 == *"Blueprint4_nested" {
@@ -71,14 +68,46 @@ fn validate_export(
             break;
         }
     }
-
+    // check if there are blueprints_list components
     let blueprints_list_found = !blueprints_list.is_empty();
 
+    // there should be no entity named xxx____bak as it means an error in the Blender side export process
+    let mut exported_names_correct = true;
+    for name in names.iter() {
+        if name.to_string().ends_with("___bak") {
+            exported_names_correct = false;
+            break;
+        }
+    }
+
+    // generate parent/child tree
+    if !root.is_empty() {
+        let root = root.single();
+        let mut tree: HashMap<String, Vec<String>> = HashMap::new();
+        // println!("root {}", root.1);
+
+        for child in children.iter_descendants(root.0) {
+            let child_name:String = names.get(child).map_or(String::from("no_name"), |e| e.to_string() ); //|e| e.to_string(), || "no_name".to_string());
+            //println!("  child {}", child_name);
+            let parent = parents.get(child).unwrap();
+            let parent_name:String = names.get(parent.get()).map_or(String::from("no_name"), |e| e.to_string() ); //|e| e.to_string(), || "no_name".to_string());
+            tree.entry(parent_name).or_default().push(child_name.clone());
+        } 
+
+        let hierarchy = to_json_string(&tree);
+        fs::write(
+            "bevy_hierarchy.json",
+            hierarchy
+        )
+        .expect("unable to write hierarchy file")
+    }
+
+
     fs::write(
         "bevy_diagnostics.json",
         format!(
-            "{{ \"animations\": {},  \"cylinder_found\": {} ,  \"nested_blueprint_found\": {}, \"empty_found\": {}, \"blueprints_list_found\": {} }}",
+            "{{ \"animations\": {},  \"nested_blueprint_found\": {}, \"empty_found\": {}, \"blueprints_list_found\": {}, \"exported_names_correct\": {} }}",
-            animations_found, cylinder_found, nested_blueprint_found, empty_found, blueprints_list_found
+            animations_found, nested_blueprint_found, empty_found, blueprints_list_found, exported_names_correct
         ),
     )
     .expect("Unable to write file");
@@ -97,6 +126,35 @@ fn exit_game(mut app_exit_events: ResMut<Events<bevy::app::AppExit>>) {
     app_exit_events.send(bevy::app::AppExit);
 }
 
+/* 
+#[derive(Resource)]
+struct Animations(Vec<Handle<AnimationClip>>);
+*/
+
+fn animations(
+    foo:Query<(Entity, &Name, &AnimationPlayer),(Added<AnimationPlayer>)>,
+    asset_server: Res<AssetServer>,
+    mut commands: Commands,
+) {
+    for bla in foo.iter() {
+        let mut counter = 0;
+        counter +=1;
+        println!("found some animations {} {}", counter, bla.1);
+        
+        if bla.1.to_string() == "Collection".to_string(){
+            /*commands.insert_resource(Animations(vec![
+                asset_server.load("models/World.glb#Animation0"),
+                asset_server.load("models/World.glb#Animation1"),
+            ]));*/
+            /*commands.entity(bla.0).insert(Animations {
+                named_animations:
+            })*/
+        }
+       
+
+    }
+}
+
 pub struct GamePlugin;
 impl Plugin for GamePlugin {
     fn build(&self, app: &mut App) {
@@ -104,6 +162,7 @@ impl Plugin for GamePlugin {
             .add_systems(Update, validate_export)
             .add_systems(OnEnter(AppState::MenuRunning), start_game)
             .add_systems(OnEnter(AppState::AppRunning), setup_game)
+            .add_systems(Update, animations)
             .add_systems(Update, generate_screenshot.run_if(on_timer(Duration::from_secs_f32(0.2)))) // TODO: run once
             .add_systems(
                 Update,

tools/gltf_auto_export/auto_export/get_standard_exporter_settings.py

@@ -0,0 +1,6 @@
+import bpy 
+
+def get_standard_exporter_settings():
+    for scene in bpy.data.scenes:
+        if 'glTF2ExportSettings' in scene:
+            print("standard exporter settings", scene['glTF2ExportSettings'])

tools/gltf_auto_export/helpers/helpers_scenes.py

@@ -20,49 +20,41 @@ def remove_unwanted_custom_properties(object):
     for component_name in object.keys():
         if not is_component_valid(object, component_name):
             to_remove.append(component_name)
-    
     for cp in custom_properties_to_filter_out + to_remove:
         if cp in object:
             del object[cp]
 
-def duplicate_object(object):
+# TODO: rename actions ?
-    obj_copy = object.copy()
+def copy_animation_data(source, target):
-    if object.data:
+    """if source.data:
-        data = object.data.copy()
+        data = source.data.copy()
-        obj_copy.data = data
+        target.data = data"""
-    if object.animation_data and object.animation_data.action:
+    if source.animation_data and source.animation_data:
-        obj_copy.animation_data.action = object.animation_data.action.copy()
+        #print("copying animation data from", source.name, "to", target.name)
-    return obj_copy
+        """print("I have animation data")
+        ad = source.animation_data
+        if ad.action:
+            print(source.name,'uses',ad.action.name)
+        for t in ad.nla_tracks:
+            for s in t.strips:
+                print(source.name,'uses',s.action.name)"""
 
-#also removes unwanted custom_properties for all objects in hiearchy
+        """if target.animation_data == None:
-def duplicate_object_recursive(object, parent, collection):
+            target.animation_data_create()
-    original_name = object.name
+        target.animation_data.action = source.animation_data.action.copy()"""
-    object.name = original_name + "____bak"
+        # alternative method, using the build in link animation operator
-    copy = duplicate_object(object)
+        with bpy.context.temp_override(active_object=source, selected_editable_objects=[target]): 
-    copy.name = original_name
+            bpy.ops.object.make_links_data(type='ANIMATION')
-    collection.objects.link(copy)
+        # we add an "animated" flag component 
-
+        target['Animated'] = '()'
-    remove_unwanted_custom_properties(copy)
+        """print("copying animation data for", source.name, target.animation_data)
-
+        properties = [p.identifier for p in source.animation_data.bl_rna.properties if not p.is_readonly]
-    if parent:
+        for prop in properties:
-        copy.parent = parent
+            print("copying stuff", prop)
-
+            setattr(target.animation_data, prop, getattr(source.animation_data, prop))"""
-    for child in object.children:
-        duplicate_object_recursive(child, copy, collection)
-    return copy
-
-
-# copies the contents of a collection into another one while replacing library instances with empties
-def copy_hollowed_collection_into(source_collection, destination_collection, parent_empty=None, filter=None, library_collections=[], addon_prefs={}):
-    collection_instances_combine_mode = getattr(addon_prefs, "collection_instances_combine_mode")
-    legacy_mode = getattr(addon_prefs, "export_legacy_mode")
-    collection_instances_combine_mode= collection_instances_combine_mode
-    for object in source_collection.objects:
-        if filter is not None and filter(object) is False:
-            continue
-        #check if a specific collection instance does not have an ovveride for combine_mode
-        combine_mode = object['_combine'] if '_combine' in object else collection_instances_combine_mode
 
+def duplicate_object(object, parent, combine_mode, destination_collection, library_collections, legacy_mode, nester=""):
+    copy = None
     if object.instance_type == 'COLLECTION' and (combine_mode == 'Split' or (combine_mode == 'EmbedExternal' and (object.instance_collection.name in library_collections)) ): 
         #print("creating empty for", object.name, object.instance_collection.name, library_collections, combine_mode)
         collection_name = object.instance_collection.name
@@ -79,28 +71,62 @@ def copy_hollowed_collection_into(source_collection, destination_collection, par
             root_node = CollectionNode()
             root_node.name = "root"
             children_per_collection = {}
-                print("collection stuff", original_name)
             get_sub_collections([object.instance_collection], root_node, children_per_collection)
             empty_obj["BlueprintsList"] = f"({json.dumps(dict(children_per_collection))})"
             #empty_obj["Assets"] = {"Animations": [], "Materials": [], "Models":[], "Textures":[], "Audio":[], "Other":[]}
         
-
         # we copy custom properties over from our original object to our empty
         for component_name, component_value in object.items():
             if component_name not in custom_properties_to_filter_out and is_component_valid(object, component_name): #copy only valid properties
                 empty_obj[component_name] = component_value
-            if parent_empty is not None:
+        copy = empty_obj
-                empty_obj.parent = parent_empty
     else:
-           
+        # for objects which are NOT collection instances     
         # we create a copy of our object and its children, to leave the original one as it is
-            if object.parent == None:
+        original_name = object.name
-                copy = duplicate_object_recursive(object, None, destination_collection)
+        object.name = original_name + "____bak"
+        copy = object.copy()
+        copy.name = original_name
+        # FIXME: orphan data comes from this one, not even sure if this copying is needed at all
+        """if object.data:
+        data = object.data.copy()
+        obj_copy.data = data"""     
 
+        destination_collection.objects.link(copy)
+
+        """if object.parent == None:
             if parent_empty is not None:
                 copy.parent = parent_empty
+            if object.animation_data:
+                copy['Animated'] = '()'"""
 
-    # for every sub-collection of the source, copy its content into a new sub-collection of the destination
+    print(nester, "copy", copy)
+    # do this both for empty replacements & normal copies
+    if parent is not None:
+        copy.parent = parent
+    remove_unwanted_custom_properties(copy)
+    copy_animation_data(object, copy)
+
+    for child in object.children:
+        duplicate_object(child, copy, combine_mode, destination_collection, library_collections, legacy_mode, nester+"  ")
+
+# copies the contents of a collection into another one while replacing library instances with empties
+def copy_hollowed_collection_into(source_collection, destination_collection, parent_empty=None, filter=None, library_collections=[], addon_prefs={}):
+    collection_instances_combine_mode = getattr(addon_prefs, "collection_instances_combine_mode")
+    legacy_mode = getattr(addon_prefs, "export_legacy_mode")
+    collection_instances_combine_mode= collection_instances_combine_mode
+
+    for object in source_collection.objects:
+        if object.name.endswith("____bak"): # some objects could already have been handled, ignore them
+            continue       
+        if filter is not None and filter(object) is False:
+            continue
+        #check if a specific collection instance does not have an ovveride for combine_mode
+        combine_mode = object['_combine'] if '_combine' in object else collection_instances_combine_mode
+        parent = parent_empty
+        duplicate_object(object, parent, combine_mode, destination_collection, library_collections, legacy_mode)
+        
+    # for every child-collection of the source, copy its content into a new sub-collection of the destination
     for collection in source_collection.children:
         original_name = collection.name
         collection.name = original_name + "____bak"
@@ -108,7 +134,6 @@ def copy_hollowed_collection_into(source_collection, destination_collection, par
 
         if parent_empty is not None:
             collection_placeholder.parent = parent_empty
-
         copy_hollowed_collection_into(
             source_collection = collection, 
             destination_collection = destination_collection, 
@@ -118,6 +143,8 @@ def copy_hollowed_collection_into(source_collection, destination_collection, par
             addon_prefs=addon_prefs
         )
 
+   
+    
     return {}
 
 # clear & remove "hollow scene"
@@ -138,14 +165,14 @@ def clear_hollow_scene(temp_scene, original_root_collection):
     # reset original names
     restore_original_names(original_root_collection)
 
-    # remove empties (only needed when we go via ops ????)
+    # remove any data we created
     temp_root_collection = temp_scene.collection 
-    temp_scene_objects = [o for o in temp_root_collection.objects]
+    temp_scene_objects = [o for o in temp_root_collection.all_objects]
     for object in temp_scene_objects:
+        print("removing", object.name)
         bpy.data.objects.remove(object, do_unlink=True)
     # remove the temporary scene
-    bpy.data.scenes.remove(temp_scene)
+    bpy.data.scenes.remove(temp_scene, do_unlink=True)
-
 
 # convenience utility to get lists of scenes
 def get_scenes(addon_prefs):

tools/gltf_auto_export/tests/expected_bevy_hierarchy.json

@@ -0,0 +1 @@
+{"b_Tail02_013":["b_Tail03_014"],"Blueprint4_nested.001":["Blueprint3"],"Collection 2 1":["Empty_in_sub_collection"],"b_Root_00":["b_Hip_01"],"b_LeftForeArm_010":["b_LeftHand_011"],"b_Spine01_02":["b_Spine02_03"],"Blueprint7_hierarchy.001":["Blueprint4_nested.001","Cube.001"],"b_RightLeg01_019":["b_RightLeg02_020"],"b_LeftUpperArm_09":["b_LeftForeArm_010"],"no_name":["Parent_Object","lighting_components_World","assets_list_World_components","Collection","Collection 2"],"Blueprint3":["Blueprint3_mesh","Blueprint3_mesh"],"world":["no_name"],"Parent_Object":["Cube.003","Blueprint1","Cylinder.001"],"Light":["Light","DirectionalLight Gizmo"],"Blueprint1.001":["Blueprint1_mesh"],"Blueprint7_hierarchy":["Cube.001"],"Spot":["Spot"],"b_Hip_01":["b_Spine01_02","b_Tail01_012","b_LeftLeg01_015","b_RightLeg01_019"],"Cylinder":["Cylinder.001","Cylinder.001"],"Collection 2":["Collection 2 1","Empty_in_collection","Spot"],"b_RightForeArm_07":["b_RightHand_08"],"Blueprint3_mesh":["Cylinder","Cylinder"],"Blueprint4_nested":["Blueprint3"],"Fox_mesh":["fox1"],"b_LeftLeg01_015":["b_LeftLeg02_016"],"b_Neck_04":["b_Head_05"],"b_RightFoot01_021":["b_RightFoot02_022"],"Blueprint1_mesh":["Cube.001","Cube.001"],"b_Tail01_012":["b_Tail02_013"],"Fox":["Fox_mesh","_rootJoint"],"Collection":["Blueprint1.001","Blueprint4_nested","Blueprint6_animated","Blueprint7_hierarchy","Camera","Cube","Empty","Light","Plane"],"Cube":["Cube"],"_rootJoint":["b_Root_00"],"b_RightLeg02_020":["b_RightFoot01_021"],"b_RightUpperArm_06":["b_RightForeArm_07"],"Plane":["Plane"],"Camera":["Camera Gizmo"],"Blueprint6_animated":["Fox"],"b_Spine02_03":["b_Neck_04","b_RightUpperArm_06","b_LeftUpperArm_09"],"b_LeftLeg02_016":["b_LeftFoot01_017"],"b_LeftFoot01_017":["b_LeftFoot02_018"],"Cube.001":["Cube.002","Cylinder","Cube.002","Cylinder"],"Cylinder.001":["Cylinder.002","Blueprint7_hierarchy.001","Empty_as_child"],"Blueprint1":["Blueprint1_mesh"]}

tools/gltf_auto_export/tests/test_basic.py

@@ -19,7 +19,6 @@ def setup_data(request):
 
     def finalizer():
         print("\nPerforming teardown...")
-        get_orphan_data()
 
         if os.path.exists(models_path):
             shutil.rmtree(models_path)
@@ -38,7 +37,10 @@ def setup_data(request):
 
 def get_orphan_data():
     orphan_meshes = [m.name for m in bpy.data.meshes if m.users == 0]
-    # print("orphan meshes before", orphan_meshes)
+    orphan_objects = [m.name for m in bpy.data.objects if m.users == 0]
+
+    #print("orphan meshes before", orphan_meshes)
+    return orphan_meshes + orphan_objects
 
 def test_export_do_not_export_blueprints(setup_data):
     auto_export_operator = bpy.ops.export_scenes.auto_gltf
@@ -61,6 +63,9 @@ def test_export_do_not_export_blueprints(setup_data):
     )
     assert os.path.exists(os.path.join(setup_data["models_path"], "World.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint1.glb")) == False
+    orphan_data = get_orphan_data()
+    assert len(orphan_data) == 0
+
 
 def test_export_custom_blueprints_path(setup_data):
     auto_export_operator = bpy.ops.export_scenes.auto_gltf
@@ -83,6 +88,7 @@ def test_export_custom_blueprints_path(setup_data):
     )
     assert os.path.exists(os.path.join(setup_data["models_path"], "World.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "another_library_path", "Blueprint1.glb")) == True
+    assert len(get_orphan_data()) == 0
 
 def test_export_materials_library(setup_data):
     auto_export_operator = bpy.ops.export_scenes.auto_gltf
@@ -107,7 +113,7 @@ def test_export_materials_library(setup_data):
 
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint1.glb")) == True
     assert os.path.exists(os.path.join(setup_data["materials_path"], "testing_materials_library.glb")) == True
-
+    assert len(get_orphan_data()) == 0
 
 def test_export_materials_library_custom_path(setup_data):
     auto_export_operator = bpy.ops.export_scenes.auto_gltf
@@ -134,6 +140,7 @@ def test_export_materials_library_custom_path(setup_data):
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint1.glb")) == True
     assert os.path.exists(os.path.join(setup_data["materials_path"], "testing_materials_library.glb")) == False
     assert os.path.exists(os.path.join(setup_data["other_materials_path"], "testing_materials_library.glb")) == True
+    assert len(get_orphan_data()) == 0
 
 def test_export_collection_instances_combine_mode(setup_data): # TODO: change & check this
     auto_export_operator = bpy.ops.export_scenes.auto_gltf
@@ -160,6 +167,7 @@ def test_export_collection_instances_combine_mode(setup_data): # TODO: change &
 
     assert os.path.exists(os.path.join(setup_data["models_path"], "World.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "World_dynamic.glb")) == False
+    assert len(get_orphan_data()) == 0
 
 
 def test_export_do_not_export_marked_assets(setup_data):
@@ -188,6 +196,7 @@ def test_export_do_not_export_marked_assets(setup_data):
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint3.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint4_nested.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint5.glb")) == False
+    assert len(get_orphan_data()) == 0
 
 
 def test_export_separate_dynamic_and_static_objects(setup_data):
@@ -216,6 +225,7 @@ def test_export_separate_dynamic_and_static_objects(setup_data):
 
     assert os.path.exists(os.path.join(setup_data["models_path"], "World.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "World_dynamic.glb")) == True
+    assert len(get_orphan_data()) == 0
 
 
 def test_export_should_not_generate_orphan_data(setup_data):
@@ -239,4 +249,5 @@ def test_export_should_not_generate_orphan_data(setup_data):
     )
     assert os.path.exists(os.path.join(setup_data["models_path"], "World.glb")) == True
     assert os.path.exists(os.path.join(setup_data["models_path"], "library", "Blueprint1.glb")) == False
+    assert len(get_orphan_data()) == 0
 

tools/gltf_auto_export/tests/test_bevy_integration.py

@@ -5,6 +5,7 @@ import json
 import pytest
 import shutil
 
+import filecmp
 from PIL import Image
 from pixelmatch.contrib.PIL import pixelmatch
 
@@ -56,7 +57,8 @@ def test_export_complex(setup_data):
     # we use the global settings for that
     export_props = {
         "main_scene_names" : ['World'],
-        "library_scene_names": ['Library']
+        "library_scene_names": ['Library'],
+        # "export_format":'GLTF_SEPARATE'
     }
     stored_settings = bpy.data.texts[".gltf_auto_export_settings"] if ".gltf_auto_export_settings" in bpy.data.texts else bpy.data.texts.new(".gltf_auto_export_settings")
     stored_settings.clear()
@@ -107,9 +109,15 @@ def test_export_complex(setup_data):
         diagnostics = json.load(diagnostics_file)
         print("diagnostics", diagnostics)
         assert diagnostics["animations"] == True
-        assert diagnostics["cylinder_found"] == True
         assert diagnostics["empty_found"] == True
         assert diagnostics["blueprints_list_found"] == True
+        assert diagnostics["exported_names_correct"] == True
+
+    with open(os.path.join(root_path, "bevy_hierarchy.json")) as hierarchy_file:
+        with open(os.path.join(os.path.dirname(__file__), "expected_bevy_hierarchy.json")) as expexted_hierarchy_file:
+            hierarchy = json.load(hierarchy_file)
+            expected = json.load(expexted_hierarchy_file)
+            assert sorted(hierarchy.items()) == sorted(expected.items())
 
     # last but not least, do a visual compare
     screenshot_expected_path = os.path.join(root_path, "expected_screenshot.png")