Merge ab7a0cab65 into 9b50d77790

(might make further changes to this down the line)

TODO.md

@@ -226,10 +226,13 @@ Blender side:
     - [ ] materials_path custom property should be ignored both in the list of fixable component AND on export
     - [ ] if we want to add material_infos & others as normal components they should not be editable, so we need another attribute, and adapt the UI for that
 
-    - [ ] if material library is toggled, then changes to materials should not change the blueprints that are using them => not really: as the name & co might change
+    - [x] if material library is toggled, then changes to materials should not change the blueprints that are using them => not really: as the name & co might change
     - [ ] material assets seem to be added to list regardless of whether material exports are enabled or not
-    - [ ] review & upgrade overall logic of material libraries, their names & output path
-    - [ ] persist exported materials path in blueprints so that it can be read from library file users
+    - [x] review & upgrade overall logic of material libraries, their names & output path
+    - [x] change materials logic to work with multiple materials per mesh
+        - [x] the index of the generated gltf files is reliable, and can be used both in Blender & Bevy
+        - [x] change MaterialInfo to MaterialInfos & turn it into a vec/list & updated logic both on Blender & Bevy side
+    - [ ] persist exported materials paths in blueprints so that it can be read from library file users
         - [ ] just like "export_path" write it into each blueprint's collection
         - [ ] scan for used materials per blueprint !
         - [ ] for scenes, scan for used materials of all non instance objects (TODO: what about overrides ?)
@@ -323,7 +326,7 @@ Bevy Side:
 - [x] fix "remove component" operator from the rename/fix/update components panel
 - [ ] replace string in BlueprintInfo path with PathBuf ?
 
-- [ ] update main docs
+- [x] update main docs
     - [x] rename project to Blenvy
     - [x] replace all references to the old 2 add-ons with those to Blenvy
 - [x] rename repo to "Blenvy"

crates/blenvy/src/blueprints/materials.rs

@@ -2,22 +2,26 @@ use bevy::prelude::*;
 
 use crate::BlenvyConfig;
 
-#[derive(Component, Reflect, Default, Debug)]
-#[reflect(Component)]
+#[derive(Reflect, Default, Debug)]
 /// struct containing the name & path of the material to apply
 pub struct MaterialInfo {
     pub name: String,
     pub path: String,
 }
 
+#[derive(Component, Reflect, Default, Debug)]
+#[reflect(Component)]
+/// component containing the full list of MaterialInfos for a given entity/object
+pub struct MaterialInfos(Vec<MaterialInfo>);
+
 #[derive(Component, Default, Debug)]
 pub struct MaterialProcessed;
 
 /// system that injects / replaces materials from material library
 pub(crate) fn inject_materials(
     mut blenvy_config: ResMut<BlenvyConfig>,
-    material_infos: Query<
-        (Entity, &MaterialInfo, &Children),
+    material_infos_query: Query<
+        (Entity, &MaterialInfos, &Children),
         Without<MaterialProcessed>, // (With<BlueprintReadyForPostProcess>)
                                     /*(
                                         Added<BlueprintMaterialAssetsLoaded>,
@@ -37,57 +41,64 @@ pub(crate) fn inject_materials(
 
     mut commands: Commands,
 ) {
-    for (entity, material_info, children) in material_infos.iter() {
-        let material_full_path = format!("{}#{}", material_info.path, material_info.name);
-        let mut material_found: Option<&Handle<StandardMaterial>> = None;
-
-        if blenvy_config
-            .materials_cache
-            .contains_key(&material_full_path)
-        {
-            debug!("material is cached, retrieving");
-            let material = blenvy_config
+    for (entity, material_infos, children) in material_infos_query.iter() {
+        for (material_index, material_info) in material_infos.0.iter().enumerate() {
+            let material_full_path = format!("{}#{}", material_info.path, material_info.name);
+            let mut material_found: Option<&Handle<StandardMaterial>> = None;
+            if blenvy_config
                 .materials_cache
-                .get(&material_full_path)
-                .expect("we should have the material available");
-            material_found = Some(material);
-        } else {
-            let model_handle: Handle<Gltf> = asset_server.load(material_info.path.clone()); // FIXME: kinda weird now
-            let mat_gltf = assets_gltf.get(model_handle.id()).unwrap_or_else(|| {
-                panic!(
-                    "materials file {} should have been preloaded",
-                    material_info.path
-                )
-            });
-            if mat_gltf
-                .named_materials
-                .contains_key(&material_info.name as &str)
+                .contains_key(&material_full_path)
             {
-                let material = mat_gltf
-                    .named_materials
-                    .get(&material_info.name as &str)
-                    .expect("this material should have been loaded at this stage, please make sure you are correctly preloading them");
-                blenvy_config
+                debug!("material is cached, retrieving");
+                let material = blenvy_config
                     .materials_cache
-                    .insert(material_full_path, material.clone());
+                    .get(&material_full_path)
+                    .expect("we should have the material available");
                 material_found = Some(material);
+            } else {
+                let model_handle: Handle<Gltf> = asset_server.load(material_info.path.clone()); // FIXME: kinda weird now
+                let mat_gltf = assets_gltf.get(model_handle.id()).unwrap_or_else(|| {
+                    panic!(
+                        "materials file {} should have been preloaded",
+                        material_info.path
+                    )
+                });
+                if mat_gltf
+                    .named_materials
+                    .contains_key(&material_info.name as &str)
+                {
+                    let material = mat_gltf
+                        .named_materials
+                        .get(&material_info.name as &str)
+                        .expect("this material should have been loaded at this stage, please make sure you are correctly preloading them");
+                    blenvy_config
+                        .materials_cache
+                        .insert(material_full_path, material.clone());
+                    material_found = Some(material);
+                }
             }
-        }
 
-        commands.entity(entity).insert(MaterialProcessed);
-
-        if let Some(material) = material_found {
-            for child in children.iter() {
-                if with_materials_and_meshes.contains(*child) {
-                    info!(
-                        "injecting material {}, path: {:?}",
-                        material_info.name,
-                        material_info.path.clone()
-                    );
-
-                    commands.entity(*child).insert(material.clone());
+            if let Some(material) = material_found {
+                for (child_index, child) in children.iter().enumerate() {
+                    if child_index == material_index {
+                        if with_materials_and_meshes.contains(*child) {
+                            info!(
+                                "injecting material {}, path: {:?}",
+                                material_info.name,
+                                material_info.path.clone()
+                            );
+        
+                            commands.entity(*child).insert(material.clone());
+                        }
+                    }
+                    
                 }
             }
         }
+       
+
+        commands.entity(entity).insert(MaterialProcessed);
+
+        
     }
 }

crates/blenvy/src/blueprints/mod.rs

@@ -91,6 +91,8 @@ impl Plugin for BlueprintsPlugin {
             .add_event::<BlueprintEvent>()
             .register_type::<BlueprintInfo>()
             .register_type::<MaterialInfo>()
+            .register_type::<MaterialInfos>()
+
             .register_type::<SpawnBlueprint>()
             .register_type::<BlueprintInstanceDisabled>()
             .register_type::<HideUntilReady>()

crates/blenvy/src/components/ronstring_to_reflect_component.rs

@@ -69,14 +69,21 @@ fn components_string_to_components(
         let mut deserializer = ron::Deserializer::from_str(ron_string.as_str())
             .expect("deserialzer should have been generated from string");
         let reflect_deserializer = ReflectDeserializer::new(type_registry);
-        let component = reflect_deserializer
+        /*let component = reflect_deserializer
             .deserialize(&mut deserializer)
             .unwrap_or_else(|_| {
                 panic!(
                     "failed to deserialize component {} with value: {:?}",
                     name, value
                 )
-            });
+            });*/
+        let Ok(component) = reflect_deserializer.deserialize(&mut deserializer) else {
+            warn!(
+                "failed to deserialize component {} with value: {:?}",
+                name, value
+            );
+            return;
+        };
 
         debug!("component {:?}", component);
         debug!("real type {:?}", component.get_represented_type_info());

tools/blenvy/add_ons/auto_export/common/auto_export.py

@@ -102,7 +102,7 @@ def auto_export(changes_per_scene, changes_per_collection, changes_per_material,
             old_selections = bpy.context.selected_objects
 
             # deal with materials
-            if export_materials_library:
+            if export_materials_library and len(materials_to_export) > 0:
                 print("export MATERIALS")
                 export_materials(materials_to_export, settings, blueprints_data)
 

tools/blenvy/add_ons/auto_export/common/export_gltf.py

@@ -73,7 +73,7 @@ def generate_gltf_export_settings(settings):
         if str(key) not in constant_keys:
             gltf_export_settings[key] =  standard_gltf_exporter_settings.get(key)
 
-    print("GLTF EXPORT SETTINGS", gltf_export_settings)
+    #print("GLTF EXPORT SETTINGS", gltf_export_settings)
     return gltf_export_settings
 
 

tools/blenvy/add_ons/auto_export/common/generate_temporary_scene_and_export.py

@@ -81,11 +81,14 @@ def generate_temporary_scene_and_export(settings, gltf_export_settings, gltf_out
 # 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, blueprints_data=None, settings={}):
     collection_instances_combine_mode = getattr(settings.auto_export, "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
+        if object.parent is not None: # if there is a parent, this object is not a direct child of the collection, and should be ignored (it will get picked up by the recursive scan inside duplicate_object)
+            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

tools/blenvy/add_ons/auto_export/constants.py

@@ -8,4 +8,4 @@ custom_properties_to_filter_out = [
     '_combine', 'template', 
     'Blenvy_scene_type', 'blenvy_scene_type',
     'materials_path', 'export_path',
-    ]
+]

tools/blenvy/add_ons/auto_export/levels/export_levels.py

@@ -1,5 +1,4 @@
 import os
-from blenvy.blueprints.blueprint_helpers import inject_blueprints_list_into_level_scene, remove_blueprints_list_from_level_scene
 from ..constants import TEMPSCENE_PREFIX
 from ..common.generate_temporary_scene_and_export import generate_temporary_scene_and_export, copy_hollowed_collection_into, clear_hollow_scene
 from ..common.export_gltf import (generate_gltf_export_settings, export_gltf)
@@ -26,8 +25,8 @@ def export_level_scene(scene, settings, blueprints_data):
 
     if export_blueprints : 
         gltf_output_path = os.path.join(levels_path_full, scene.name)
-
-        inject_blueprints_list_into_level_scene(scene, blueprints_data, settings)
+        # we inject assets into the scene before it gets exported
+        # TODO: this should be done in the temporary scene !
         upsert_scene_assets(scene, blueprints_data=blueprints_data, settings=settings)
 
         if export_separate_dynamic_and_static_objects:
@@ -67,8 +66,6 @@ def export_level_scene(scene, settings, blueprints_data):
                 tempScene_cleaner= lambda temp_scene, params: clear_hollow_scene(original_root_collection=scene.collection, temp_scene=temp_scene, **params)
             )
 
-        remove_blueprints_list_from_level_scene(scene)
-
     else:
         gltf_output_path = os.path.join(assets_path_full, scene.name)
         print("       exporting gltf to", gltf_output_path, ".gltf/glb")

tools/blenvy/add_ons/auto_export/materials/export_materials.py

@@ -46,6 +46,13 @@ def generate_materials_scene_content(root_collection, used_material_names):
         make_material_object("Material_"+material_name, [index * 0.2,0,0], material=material, collection=root_collection)
     return {}
 
+# generates a scene for a given material
+def generate_material_scene_content(root_collection, material_name):
+    material = bpy.data.materials[material_name]
+    make_material_object(f"Material_{material_name}", [0,0,0], material=material, collection=root_collection)
+    return {}
+
+
 def clear_materials_scene(temp_scene):
     root_collection = temp_scene.collection 
     scene_objects = [o for o in root_collection.objects]
@@ -83,23 +90,20 @@ def export_materials(materials_to_export, settings, blueprints_data):
                         'export_apply':True
                         }
 
-        current_project_name = Path(bpy.context.blend_data.filepath).stem
-        gltf_output_path = os.path.join(materials_path_full, current_project_name + "_materials")
+        for material in materials_to_export:
+            print("exporting material", material.name)
+            gltf_output_path = os.path.join(materials_path_full, material.name)
 
-        print("       exporting Materials to", gltf_output_path, ".gltf/glb")
+            generate_temporary_scene_and_export(
+                settings=settings, 
+                gltf_export_settings=gltf_export_settings,
+                temp_scene_name="__materials_scene",
+                gltf_output_path=gltf_output_path,
+                tempScene_filler= lambda temp_collection: generate_material_scene_content(temp_collection, material.name),
+                tempScene_cleaner= lambda temp_scene, params: clear_materials_scene(temp_scene=temp_scene)
+            )
 
-        generate_temporary_scene_and_export(
-            settings=settings, 
-            gltf_export_settings=gltf_export_settings,
-            temp_scene_name="__materials_scene",
-            gltf_output_path=gltf_output_path,
-            tempScene_filler= lambda temp_collection: generate_materials_scene_content(temp_collection, used_material_names),
-            tempScene_cleaner= lambda temp_scene, params: clear_materials_scene(temp_scene=temp_scene)
-        )
     
-  
-
-
 def cleanup_materials(collections, library_scenes):
     # remove temporary components
     clear_material_info(collections, library_scenes)

tools/blenvy/add_ons/auto_export/materials/get_materials_to_export.py

@@ -8,21 +8,26 @@ def get_materials_to_export(changes_per_material, changed_export_parameters, blu
     materials_path_full = getattr(settings,"materials_path_full", "")
 
     change_detection = getattr(settings.auto_export, "change_detection")
+    export_materials_library = getattr(settings.auto_export, "export_materials_library")
     collection_instances_combine_mode = getattr(settings.auto_export, "collection_instances_combine_mode")
 
     all_materials = bpy.data.materials
     local_materials = [material for material in all_materials if material.library is None]
     materials_to_export = []
-    if change_detection and not changed_export_parameters:
-        changed_materials = [bpy.data.materials[material_name] for material_name in list(changes_per_material.keys())]
 
-        # first check if all materials have already been exported before (if this is the first time the exporter is run
-        # in your current Blender session for example)
-        materials_not_on_disk = find_materials_not_on_disk(local_materials, materials_path_full, export_gltf_extension)
+    if export_materials_library and change_detection:
+        if changed_export_parameters:
+            materials_to_export = [bpy.data.materials[material_name] for material_name in list(changes_per_material.keys())] # TODO: should be based on the list of materials in use
+        else :
+            changed_materials = [bpy.data.materials[material_name] for material_name in list(changes_per_material.keys())]
 
-        # also deal with blueprints that are always marked as "always_export"   
-        #materials_always_export = [material for material in internal_materials if is_material_always_export(material)]
-        materials_always_export = []
-        materials_to_export =  list(set(changed_materials + materials_not_on_disk + materials_always_export))
+            # first check if all materials have already been exported before (if this is the first time the exporter is run
+            # in your current Blender session for example)
+            materials_not_on_disk = find_materials_not_on_disk(local_materials, materials_path_full, export_gltf_extension)
 
+            # also deal with blueprints that are always marked as "always_export"   
+            #materials_always_export = [material for material in internal_materials if is_material_always_export(material)]
+            materials_always_export = []
+            materials_to_export =  list(set(changed_materials + materials_not_on_disk + materials_always_export))
+    print("materials_to_export", materials_to_export, local_materials)
     return materials_to_export

tools/blenvy/add_ons/auto_export/utils.py

@@ -24,63 +24,14 @@ def assets_to_fake_ron(list_like):
 
 # TODO : move to assets
 def upsert_scene_assets(scene, blueprints_data, settings):
-    """print("level scene", scene)
-    for asset in scene.user_assets:
-        print("  user asset", asset.name, asset.path)
-    for asset in scene.generated_assets:
-        print("  generated asset", asset)"""
-    """for blueprint in blueprints_data.blueprints_per_scenes[scene.name]:
-        print("BLUEPRINT", blueprint)"""
-    blueprint_instances_in_scene = blueprints_data.blueprint_instances_per_level_scene.get(scene.name, {}).keys()
-    blueprints_in_scene = [blueprints_data.blueprints_per_name[blueprint_name] for blueprint_name in blueprint_instances_in_scene]
-    #yala = [blueprint.collection.user_assets for blueprint in blueprints_in_scene]
-    #print("dsfsdf", yala)
-    level_assets = []
     all_assets = []
-    export_gltf_extension = getattr(settings, "export_gltf_extension", ".glb")
-
-    blueprints_path =  getattr(settings, "blueprints_path")
-    for blueprint in blueprints_in_scene:
-        if blueprint.local:
-            blueprint_exported_path = posixpath.join(blueprints_path, f"{blueprint.name}{export_gltf_extension}")
-        else:
-            # get the injected path of the external blueprints
-            blueprint_exported_path = blueprint.collection['export_path'] if 'export_path' in blueprint.collection else None
-            # add their material path
-            materials_exported_path = blueprint.collection['materials_path'] if 'materials_path' in blueprint.collection else None
-            level_assets.append({"name": blueprint.name+"_material", "path": materials_exported_path})#, "generated": True, "internal":blueprint.local, "parent": None})
-
-
-        if blueprint_exported_path is not None: # and not does_asset_exist(assets_list, blueprint_exported_path):
-            level_assets.append({"name": blueprint.name, "path": blueprint_exported_path})#, "generated": True, "internal":blueprint.local, "parent": None})
-
-        # now also add the assets of the blueprints # TODO: wait no , these should not be a part of the (scene) local assets
-        for asset in blueprint.collection.user_assets:
-            #print("adding assets of blueprint", asset.name)
-            all_assets.append({"name": asset.name, "path": asset.path})
-
-    """for asset in level_assets:
-        print("  generated asset", asset.name, asset.path)"""
-    
-    materials_path =  getattr(settings, "materials_path")
-    current_project_name = Path(bpy.context.blend_data.filepath).stem
-    materials_library_name = f"{current_project_name}_materials"
-    materials_exported_path = posixpath.join(materials_path, f"{materials_library_name}{export_gltf_extension}")
-    material_assets = [{"name": materials_library_name, "path": materials_exported_path}] # we also add the material library as an asset
-    print("material_assets", material_assets, "extension", export_gltf_extension)
-
-
     all_assets_raw = get_level_scene_assets_tree2(level_scene=scene, blueprints_data=blueprints_data, settings=settings)
     local_assets =  [{"name": asset["name"], "path": asset["path"]} for asset in all_assets_raw if asset['parent'] is None and asset["path"] != "" ] 
     all_assets = [{"name": asset["name"], "path": asset["path"]} for asset in all_assets_raw if asset["path"] != "" ] 
     print("all_assets_raw", all_assets_raw)
     print("all_assets", all_assets)
-    print("local assets", local_assets + material_assets)
-    scene["BlueprintAssets"] = assets_to_fake_ron(local_assets + material_assets)
-
-
-    #scene["BlueprintAssets"] = assets_to_fake_ron(all_assets + [{"name": asset.name, "path": asset.path} for asset in scene.user_assets] + level_assets + material_assets)
-    #scene["BlueprintAssets"] = assets_to_fake_ron([{'name':'foo', 'path':'bar'}])
+    print("local assets", local_assets)
+    scene["BlueprintAssets"] = assets_to_fake_ron(all_assets) #local_assets
 
 def upsert_blueprint_assets(blueprint, blueprints_data, settings):   
     all_assets_raw = get_blueprint_asset_tree(blueprint=blueprint, blueprints_data=blueprints_data, settings=settings)

tools/blenvy/assets/assets_scan.py

@@ -3,6 +3,7 @@ import json
 import posixpath
 import bpy
 
+from ..materials.materials_helpers import get_blueprint_materials
 from .asset_helpers import does_asset_exist, get_user_assets, get_user_assets_as_list
 
 def scan_assets(scene, blueprints_data, settings):
@@ -62,6 +63,7 @@ def get_userTextures():
     print("textures", textures)
 
 def get_blueprint_assets_tree(blueprint, blueprints_data, parent, settings):
+    print("blueprint", blueprint.name)
     blueprints_path = getattr(settings, "blueprints_path")
     export_gltf_extension = getattr(settings, "export_gltf_extension", ".glb")
     assets_list = []
@@ -88,6 +90,15 @@ def get_blueprint_assets_tree(blueprint, blueprints_data, parent, settings):
         asset["parent"] = parent
         asset["internal"] = blueprint.local
     assets_list += direct_assets
+
+    # now get materials used by this blueprint
+    (blueprint_materials_names, materials_per_object) = get_blueprint_materials(blueprint=blueprint)
+    print("blueprint_materials", blueprint_materials_names)
+    for material_name in blueprint_materials_names:
+        materials_path =  getattr(settings, "materials_path")
+        materials_exported_path = posixpath.join(materials_path, f"{material_name}{export_gltf_extension}")
+        assets_list.append({"name": material_name, "path": materials_exported_path, "type": "MATERIAL", "generated": True,"internal":blueprint.local, "parent": blueprint.name})
+
     return assets_list
 
 def get_level_scene_assets_tree(level_scene, blueprints_data, settings):

tools/blenvy/assets/operators.py

@@ -70,11 +70,6 @@ class BLENVY_OT_assets_add(Operator):
             context.window_manager.assets_registry.asset_type_selector = "MODEL"
             context.window_manager.assets_registry.asset_path_selector = ""
 
-        """if blueprint_assets:
-            bpy.data.collections[self.target_name]["assets"] = json.dumps(assets)
-        else:
-            bpy.data.scenes[self.target_name]["assets"] = json.dumps(assets)"""
-
         return {'FINISHED'}
     
 

tools/blenvy/blueprints/blueprint_helpers.py

@@ -5,8 +5,6 @@ import bpy
 from pathlib import Path
 import posixpath
 
-from ..core.scene_helpers import add_scene_property
-
 def find_blueprints_not_on_disk(blueprints, folder_path, extension):
     not_found_blueprints = []
     for blueprint in blueprints:
@@ -23,64 +21,9 @@ def check_if_blueprint_on_disk(scene_name, folder_path, extension):
     return found
 
 def inject_export_path_into_internal_blueprints(internal_blueprints, blueprints_path, gltf_extension, settings):
-    export_materials_library = getattr(settings.auto_export, "export_materials_library")
-    # FIXME: duplicate of materials stuff
-    export_gltf_extension = getattr(settings, "export_gltf_extension", ".glb")
-    materials_path =  getattr(settings, "materials_path")
-    current_project_name = Path(bpy.context.blend_data.filepath).stem
-    materials_library_name = f"{current_project_name}_materials"
-    materials_exported_path = posixpath.join(materials_path, f"{materials_library_name}{export_gltf_extension}")
-
     for blueprint in internal_blueprints:
         blueprint_exported_path = posixpath.join(blueprints_path, f"{blueprint.name}{gltf_extension}")
         # print("injecting blueprint path", blueprint_exported_path, "for", blueprint.name)
         blueprint.collection["export_path"] = blueprint_exported_path
-        if export_materials_library:
-            blueprint.collection["materials_path"] = materials_exported_path
-
-
-def inject_blueprints_list_into_level_scene(scene, blueprints_data, settings):
-    project_root_path = getattr(settings, "project_root_path")
-    assets_path = getattr(settings,"assets_path")
-    levels_path = getattr(settings,"levels_path")
-    blueprints_path = getattr(settings, "blueprints_path")
-    export_gltf_extension = getattr(settings, "export_gltf_extension")
-
-    # print("injecting assets/blueprints data into scene")
-    assets_list_name = f"assets_list_{scene.name}_components"
-    assets_list_data = {}
-
-    blueprint_instance_names_for_scene = blueprints_data.blueprint_instances_per_level_scene.get(scene.name, None)
-    blueprint_assets_list = []
-    if blueprint_instance_names_for_scene:
-        for blueprint_name in blueprint_instance_names_for_scene:
-            blueprint = blueprints_data.blueprints_per_name.get(blueprint_name, None)
-            if blueprint is not None: 
-                #print("BLUEPRINT", blueprint)
-                blueprint_exported_path = None
-                if blueprint.local:
-                    blueprint_exported_path = posixpath.join(blueprints_path, f"{blueprint.name}{export_gltf_extension}")
-                else:
-                    # get the injected path of the external blueprints
-                    blueprint_exported_path = blueprint.collection['Export_path'] if 'Export_path' in blueprint.collection else None
-                    #print("foo", dict(blueprint.collection))
-                if blueprint_exported_path is not None:
-                    blueprint_assets_list.append({"name": blueprint.name, "path": blueprint_exported_path, "type": "MODEL", "internal": True})
-                
-
-  
-
-    assets_list_name = f"assets_{scene.name}"
-    scene["assets"] = json.dumps(blueprint_assets_list)
-
-    #print("blueprint assets", blueprint_assets_list)
-
-def remove_blueprints_list_from_level_scene(scene):
-    assets_list = None
-    assets_list_name = f"assets_list_{scene.name}_components"
-
-    for object in scene.objects:
-        if object.name == assets_list_name:
-            assets_list = object
-    if assets_list is not None:
-        bpy.data.objects.remove(assets_list, do_unlink=True)
+        """if export_materials_library:
+            blueprint.collection["materials_path"] = materials_exported_path"""

tools/blenvy/materials/materials_helpers.py

@@ -1,28 +1,15 @@
 import os
 import posixpath
-import bpy
-from pathlib import Path
-
 from ..core.helpers_collections import (traverse_tree)
 
 def find_materials_not_on_disk(materials, materials_path_full, extension):
     not_found_materials = []
-
-    current_project_name = Path(bpy.context.blend_data.filepath).stem
-    materials_library_name = f"{current_project_name}_materials"
-    materials_exported_path = os.path.join(materials_path_full, f"{materials_library_name}{extension}")
-
-    found = os.path.exists(materials_exported_path) and os.path.isfile(materials_exported_path)
     for material in materials:
-        if not found:
-                not_found_materials.append(material)
-
-    """for material in materials:
         gltf_output_path = os.path.join(materials_path_full, material.name + extension)
         # print("gltf_output_path", gltf_output_path)
         found = os.path.exists(gltf_output_path) and os.path.isfile(gltf_output_path)
         if not found:
-            not_found_materials.append(material)"""
+            not_found_materials.append(material)
     return not_found_materials
 
 def check_if_material_on_disk(scene_name, folder_path, extension):
@@ -40,7 +27,9 @@ def get_materials(object, materials_per_object):
         # print("    slot", m, "material", material)
         used_materials_names.append(material.name)
         # TODO:, also respect slots & export multiple materials if applicable ! 
-        materials_per_object[object] = material
+        if not object in materials_per_object:
+            materials_per_object[object] = []
+        materials_per_object[object].append(material)
     return used_materials_names
 
 
@@ -62,22 +51,17 @@ def get_all_materials(collection_names, library_scenes):
 def add_material_info_to_objects(materials_per_object, settings):
     materials_path =  getattr(settings, "materials_path")
     export_gltf_extension = getattr(settings, "export_gltf_extension", ".glb")
-
-    current_project_name = Path(bpy.context.blend_data.filepath).stem
-    materials_library_name = f"{current_project_name}_materials"
-    materials_exported_path = posixpath.join(materials_path, f"{materials_library_name}{export_gltf_extension}")
-    #print("ADDING MAERIAL INFOS")
     for object in materials_per_object.keys():
-        material = materials_per_object[object]
-
+        material_infos = []
+        for material in materials_per_object[object]:
+            materials_exported_path = posixpath.join(materials_path, f"{material.name}{export_gltf_extension}")
+            material_info = f'(name: "{material.name}", path: "{materials_exported_path}")' 
+            material_infos.append(material_info)
         # problem with using actual components: you NEED the type registry/component infos, so if there is none , or it is not loaded yet, it does not work
         # for a few components we could hardcode this
-        component_value = f'(name: "{material.name}", path: "{materials_exported_path}")' 
-        #bpy.ops.blenvy.component_add(target_item_name=object.name, target_item_type="OBJECT", component_type="blenvy::blueprints::materials::MaterialInfo", component_value=component_value)
-
-        materials_exported_path = posixpath.join(materials_path, f"{materials_library_name}{export_gltf_extension}")
-        object['MaterialInfo'] = component_value
-        print("adding materialInfo to object", object, "material info", component_value)
+        #bpy.ops.blenvy.component_add(target_item_name=object.name, target_item_type="OBJECT", component_type="blenvy::blueprints::materials::MaterialInfos", component_value=component_value)
+        object['MaterialInfos'] = f"({material_infos})".replace("'","") 
+        print("adding materialInfos to object", object, "material infos", material_infos)
 
 
 # get all the materials of all objects in a given scene