feat(Blenvy): continued restructuring & upgrade of blueprint spawning logic

* updated simple test to include deep nested blueprint instance within blueprint instance case
 * restructured materials handling to use the new logic, removed clutter
 * experimenting with solutions to the deeply nested blueprint instances problem
 * moved out all obsolete code to "old" folder, keeeping around until all problems are solved
 * added hack-ish solution to the "aabb system as post process" implementation
 * various minor boilerprate changes

crates/blenvy/old/materials_old.rs

@@ -0,0 +1,190 @@
+use std::path::Path;
+
+use bevy::{
+    asset::{AssetServer, Assets, Handle},
+    ecs::{
+        component::Component,
+        entity::Entity,
+        query::{Added, With},
+        reflect::ReflectComponent,
+        system::{Commands, Query, Res, ResMut},
+    },
+    gltf::Gltf,
+    hierarchy::{Children, Parent},
+    log::debug,
+    pbr::StandardMaterial,
+    reflect::Reflect,
+    render::mesh::Mesh,
+};
+
+use crate::{AssetLoadTracker, BlueprintAssetsLoadState, BlenvyConfig, BlueprintInstanceReady};
+
+#[derive(Component, Reflect, Default, Debug)]
+#[reflect(Component)]
+/// struct containing the name & path of the material to apply
+pub struct MaterialInfo {
+    pub name: String,
+    pub path: String,
+}
+
+/// flag component
+#[derive(Component)]
+pub(crate) struct BlueprintMaterialAssetsLoaded;
+/// flag component
+#[derive(Component)]
+pub(crate) struct BlueprintMaterialAssetsNotLoaded;
+
+/// system that injects / replaces materials from material library
+pub(crate) fn materials_inject(
+    blenvy_config: ResMut<BlenvyConfig>,
+    material_infos: Query<(Entity, &MaterialInfo), Added<MaterialInfo>>,
+    asset_server: Res<AssetServer>,
+    mut commands: Commands,
+) {
+
+
+    for (entity, material_info) in material_infos.iter() {
+        println!("Entity with material info {:?} {:?}", entity, material_info);
+        let material_full_path = format!("{}#{}", material_info.path, material_info.name);
+        if blenvy_config
+            .materials_cache
+            .contains_key(&material_full_path)
+        {
+            debug!("material is cached, retrieving");
+            blenvy_config
+                .materials_cache
+                .get(&material_full_path)
+                .expect("we should have the material available");
+            commands
+                .entity(entity)
+                .insert(BlueprintMaterialAssetsLoaded);
+        } else {
+            let material_file_handle = asset_server.load_untyped(&material_info.path.clone()); // : Handle<Gltf> 
+            let material_file_id = material_file_handle.id();
+            
+            let asset_infos: Vec<AssetLoadTracker> = vec![AssetLoadTracker {
+                name: material_info.name.clone(),
+                path: material_info.path.clone(),
+                id: material_file_id,
+                loaded: false,
+                handle: material_file_handle.clone(),
+            }];
+
+            commands
+                .entity(entity)
+                .insert(BlueprintAssetsLoadState {
+                    all_loaded: false,
+                    asset_infos,
+                    ..Default::default()
+                })
+                .insert(BlueprintMaterialAssetsNotLoaded);
+           
+        }
+    }
+}
+
+// TODO, merge with blueprints_check_assets_loading, make generic ?
+pub(crate) fn check_for_material_loaded(
+    mut blueprint_assets_to_load: Query<
+        (Entity, &mut BlueprintAssetsLoadState),
+        With<BlueprintMaterialAssetsNotLoaded>,
+    >,
+    asset_server: Res<AssetServer>,
+    mut commands: Commands,
+) {
+    for (entity, mut assets_to_load) in blueprint_assets_to_load.iter_mut() {
+        let mut all_loaded = true;
+        let mut loaded_amount = 0;
+        let total = assets_to_load.asset_infos.len();
+        for tracker in assets_to_load.asset_infos.iter_mut() {
+            let asset_id = tracker.id;
+            let loaded = asset_server.is_loaded_with_dependencies(asset_id);
+            tracker.loaded = loaded;
+            if loaded {
+                loaded_amount += 1;
+            } else {
+                all_loaded = false;
+            }
+        }
+        let progress: f32 = loaded_amount as f32 / total as f32;
+        assets_to_load.progress = progress;
+
+        if all_loaded {
+            assets_to_load.all_loaded = true;
+            commands
+                .entity(entity)
+                .insert(BlueprintMaterialAssetsLoaded)
+                .remove::<BlueprintMaterialAssetsNotLoaded>();
+        }
+    }
+}
+
+/// system that injects / replaces materials from material library
+pub(crate) fn materials_inject2(
+    mut blenvy_config: ResMut<BlenvyConfig>,
+    material_infos: Query<
+        (&MaterialInfo, &Children),
+        (
+            Added<BlueprintMaterialAssetsLoaded>,
+            With<BlueprintMaterialAssetsLoaded>,
+        ),
+    >,
+    with_materials_and_meshes: Query<
+        (),
+        (
+            With<Parent>,
+            With<Handle<StandardMaterial>>,
+            With<Handle<Mesh>>,
+        ),
+    >,
+    assets_gltf: Res<Assets<Gltf>>,
+    asset_server: Res<AssetServer>,
+
+    mut commands: Commands,
+) {
+    for (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
+                .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())
+                .expect("material should have been preloaded");
+            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");
+                blenvy_config
+                    .materials_cache
+                    .insert(material_full_path, material.clone());
+                material_found = Some(material);
+            }
+        }
+
+        if let Some(material) = material_found {
+            for child in children.iter() {
+                if with_materials_and_meshes.contains(*child) {
+                    debug!(
+                        "injecting material {}, path: {:?}",
+                        material_info.name,
+                        material_info.path.clone()
+                    );
+
+                    commands.entity(*child).insert(material.clone());
+                }
+            }
+        }
+    }
+}

crates/blenvy/old/spawn_post_process.rs

@@ -5,7 +5,7 @@ use bevy::prelude::*;
 use bevy::scene::SceneInstance;
 // use bevy::utils::hashbrown::HashSet;
 
-use crate::{BlueprintAnimationPlayerLink, BlueprintAnimations, BlueprintInfo, BlueprintReadyForPostProcess, BlueprintSpawned, BlueprintSpawning, SpawnTrackRoot, SubBlueprintsSpawnTracker};
+use crate::{BlueprintAnimationPlayerLink, BlueprintAnimations, BlueprintInfo, BlueprintReadyForPostProcess, BlueprintInstanceReady, BlueprintSpawning, SpawnTrackRoot, SubBlueprintsSpawnTracker};
 use crate::{SpawnHere, Spawned};
 use crate::{
     BlueprintEvent, CopyComponents, InBlueprint, NoInBlueprint, OriginalChildren
@@ -113,7 +113,7 @@ pub(crate) fn spawned_blueprint_post_process( // rename to '
         );
 
         commands.entity(original)
-        .insert(BlueprintSpawned)
+        .insert(BlueprintInstanceReady)
         .remove::<BlueprintSpawning>()
         
 

crates/blenvy/src/blueprints/aabb.rs

@@ -5,6 +5,7 @@ use crate::{BlenvyConfig, BlueprintReadyForFinalizing, BlueprintReadyForPostProc
 /// helper system that computes the compound aabbs of the scenes/blueprints
 pub fn compute_scene_aabbs(
     root_entities: Query<(Entity, &Name), (With<BlueprintReadyForPostProcess>, Without<Aabb>)>,
+    other_entities: Query<Entity, (With<BlueprintReadyForPostProcess>, With<Aabb>)>,
     children: Query<&Children>,
     existing_aabbs: Query<&Aabb>,
 
@@ -24,10 +25,16 @@ pub fn compute_scene_aabbs(
             commands.entity(root_entity).insert(*aabb).insert(BlueprintReadyForFinalizing);
         } else {
             let aabb = compute_descendant_aabb(root_entity, &children, &existing_aabbs);
-            commands.entity(root_entity).insert(aabb).insert(BlueprintReadyForFinalizing);
             blenvy_config.aabb_cache.insert(name.to_string(), aabb);
+            info!("generating aabb for {:?}", name);
+            commands.entity(root_entity).insert(aabb).insert(BlueprintReadyForFinalizing);
+
         }
     }
+    for entity in other_entities.iter() {
+        println!("stuff with AABB");
+        commands.entity(entity).insert(BlueprintReadyForFinalizing); // FIXME ! Yikes !!
+    }
 }
 
 pub fn compute_descendant_aabb(

crates/blenvy/src/blueprints/materials.rs

@@ -1,23 +1,6 @@
-use std::path::Path;
+use bevy::prelude::*;
 
-use bevy::{
+use crate::{BlenvyConfig, BlueprintReadyForPostProcess};
-    asset::{AssetServer, Assets, Handle},
-    ecs::{
-        component::Component,
-        entity::Entity,
-        query::{Added, With},
-        reflect::ReflectComponent,
-        system::{Commands, Query, Res, ResMut},
-    },
-    gltf::Gltf,
-    hierarchy::{Children, Parent},
-    log::debug,
-    pbr::StandardMaterial,
-    reflect::Reflect,
-    render::mesh::Mesh,
-};
-
-use crate::{AssetLoadTracker, BlueprintAssetsLoadState, BlenvyConfig, BlueprintInstanceReady};
 
 #[derive(Component, Reflect, Default, Debug)]
 #[reflect(Component)]
@@ -27,107 +10,21 @@ pub struct MaterialInfo {
     pub path: String,
 }
 
-/// flag component
+#[derive(Component, Default, Debug)]
-#[derive(Component)]
+pub struct MaterialProcessed;
-pub(crate) struct BlueprintMaterialAssetsLoaded;
+
-/// flag component
-#[derive(Component)]
-pub(crate) struct BlueprintMaterialAssetsNotLoaded;
 
 /// system that injects / replaces materials from material library
-pub(crate) fn materials_inject(
+pub(crate) fn inject_materials(
-    blenvy_config: ResMut<BlenvyConfig>,
-    material_infos: Query<(Entity, &MaterialInfo), Added<MaterialInfo>>,
-    asset_server: Res<AssetServer>,
-    mut commands: Commands,
-) {
-
-
-    for (entity, material_info) in material_infos.iter() {
-        println!("Entity with material info {:?} {:?}", entity, material_info);
-        let material_full_path = format!("{}#{}", material_info.path, material_info.name);
-        if blenvy_config
-            .materials_cache
-            .contains_key(&material_full_path)
-        {
-            debug!("material is cached, retrieving");
-            blenvy_config
-                .materials_cache
-                .get(&material_full_path)
-                .expect("we should have the material available");
-            commands
-                .entity(entity)
-                .insert(BlueprintMaterialAssetsLoaded);
-        } else {
-            let material_file_handle = asset_server.load_untyped(&material_info.path.clone()); // : Handle<Gltf> 
-            let material_file_id = material_file_handle.id();
-            
-            let asset_infos: Vec<AssetLoadTracker> = vec![AssetLoadTracker {
-                name: material_info.name.clone(),
-                path: material_info.path.clone(),
-                id: material_file_id,
-                loaded: false,
-                handle: material_file_handle.clone(),
-            }];
-
-            commands
-                .entity(entity)
-                .insert(BlueprintAssetsLoadState {
-                    all_loaded: false,
-                    asset_infos,
-                    ..Default::default()
-                })
-                .insert(BlueprintMaterialAssetsNotLoaded);
-           
-        }
-    }
-}
-
-// TODO, merge with blueprints_check_assets_loading, make generic ?
-pub(crate) fn check_for_material_loaded(
-    mut blueprint_assets_to_load: Query<
-        (Entity, &mut BlueprintAssetsLoadState),
-        With<BlueprintMaterialAssetsNotLoaded>,
-    >,
-    asset_server: Res<AssetServer>,
-    mut commands: Commands,
-) {
-    for (entity, mut assets_to_load) in blueprint_assets_to_load.iter_mut() {
-        let mut all_loaded = true;
-        let mut loaded_amount = 0;
-        let total = assets_to_load.asset_infos.len();
-        for tracker in assets_to_load.asset_infos.iter_mut() {
-            let asset_id = tracker.id;
-            let loaded = asset_server.is_loaded_with_dependencies(asset_id);
-            tracker.loaded = loaded;
-            if loaded {
-                loaded_amount += 1;
-            } else {
-                all_loaded = false;
-            }
-        }
-        let progress: f32 = loaded_amount as f32 / total as f32;
-        assets_to_load.progress = progress;
-
-        if all_loaded {
-            assets_to_load.all_loaded = true;
-            commands
-                .entity(entity)
-                .insert(BlueprintMaterialAssetsLoaded)
-                .remove::<BlueprintMaterialAssetsNotLoaded>();
-        }
-    }
-}
-
-/// system that injects / replaces materials from material library
-pub(crate) fn materials_inject2(
     mut blenvy_config: ResMut<BlenvyConfig>,
     material_infos: Query<
-        (&MaterialInfo, &Children),
+        (Entity, &MaterialInfo, &Children),
-        (
+        Without<MaterialProcessed>
+        // (With<BlueprintReadyForPostProcess>)
+        /*(
             Added<BlueprintMaterialAssetsLoaded>,
             With<BlueprintMaterialAssetsLoaded>,
-        ),
+        ),*/
     >,
     with_materials_and_meshes: Query<
         (),
@@ -142,7 +39,7 @@ pub(crate) fn materials_inject2(
 
     mut commands: Commands,
 ) {
-    for (material_info, children) in material_infos.iter() {
+    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;
 
@@ -165,7 +62,7 @@ pub(crate) fn materials_inject2(
                 let material = mat_gltf
                     .named_materials
                     .get(&material_info.name as &str)
-                    .expect("this material should have been loaded");
+                    .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());
@@ -173,10 +70,12 @@ pub(crate) fn materials_inject2(
             }
         }
 
+        commands.entity(entity).insert(MaterialProcessed);
+
         if let Some(material) = material_found {
             for child in children.iter() {
                 if with_materials_and_meshes.contains(*child) {
-                    debug!(
+                    info!(
                         "injecting material {}, path: {:?}",
                         material_info.name,
                         material_info.path.clone()

crates/blenvy/src/blueprints/mod.rs

@@ -1,9 +1,6 @@
 pub mod spawn_from_blueprints;
 pub use spawn_from_blueprints::*;
 
-pub mod spawn_post_process;
-pub(crate) use spawn_post_process::*;
-
 pub mod animation;
 pub use animation::*;
 
@@ -70,10 +67,38 @@ fn aabbs_enabled(blenvy_config: Res<BlenvyConfig>) -> bool {
     blenvy_config.aabbs
 }
 
+fn hot_reload(watching_for_changes: Res<WatchingForChanges>) -> bool {
+    watching_for_changes.0
+}
+
+
+trait BlenvyApp {
+    fn register_watching_for_changes(&mut self) -> &mut Self;
+}
+
+impl BlenvyApp for App {
+    fn register_watching_for_changes(&mut self) -> &mut Self {
+        let asset_server = self
+            .world()
+            .get_resource::<AssetServer>()
+            .expect(ASSET_ERROR);
+
+        let watching_for_changes = asset_server.watching_for_changes();
+        self.insert_resource(WatchingForChanges(watching_for_changes))
+    }
+}
+
+#[derive(Debug, Clone, Resource, Default)]
+pub(crate) struct WatchingForChanges(pub(crate) bool);
+const ASSET_ERROR: &str = ""; // TODO
+
 
 impl Plugin for BlueprintsPlugin {
     fn build(&self, app: &mut App) {
         app
+            .register_watching_for_changes()
+
+
             .register_type::<BlueprintInfo>()
             .register_type::<MaterialInfo>()
             .register_type::<SpawnHere>()
@@ -94,7 +119,6 @@ impl Plugin for BlueprintsPlugin {
             .add_event::<BlueprintEvent>()
 
 
-
             .register_type::<HashMap<String, Vec<String>>>()
             .configure_sets(
                 Update,
@@ -111,32 +135,16 @@ impl Plugin for BlueprintsPlugin {
                     blueprints_scenes_spawned,
                     blueprints_transfer_components,
 
-                   
+                    // post process
-                    (compute_scene_aabbs, apply_deferred)
+                    inject_materials,
-                        .chain(),
+                    compute_scene_aabbs,// .run_if(aabbs_enabled),
-                        // .run_if(aabbs_enabled),
-                    apply_deferred,
                         
                     blueprints_finalize_instances,
 
-                    
-                    /*(
-                        materials_inject,
-                        check_for_material_loaded,
-                        materials_inject2,
-                    )
-                        .chain()*/
                 )
                     .chain()
                     .in_set(GltfBlueprintsSet::Spawn),
             )
-            /* .add_systems(
-                Update,
-                (spawned_blueprint_post_process, apply_deferred)
-                    .chain()
-                    .in_set(GltfBlueprintsSet::AfterSpawn),
-            )*/
-
             /* .add_systems(
                 Update,
                 (
@@ -144,9 +152,8 @@ impl Plugin for BlueprintsPlugin {
                     trigger_blueprint_animation_markers_events,
                 ),
             )*/
-
+            // hot reload
-            .add_systems(Update, react_to_asset_changes)
+            .add_systems(Update, react_to_asset_changes.run_if(hot_reload))
-            // .add_systems(Update, track_sub_blueprints)
             ;
     }
 }

crates/blenvy/src/blueprints/spawn_from_blueprints.rs

@@ -80,8 +80,9 @@ pub enum BlueprintEvent {
     },
 
     /// 
-    Ready {
+    InstanceReady {
         entity: Entity,
+        blueprint_name: String,
         blueprint_path: String,
     }
     
@@ -102,12 +103,6 @@ pub struct DynamicBlueprintInstance;
 pub struct BlueprintSpawning;
 
 
-#[derive(Component, Reflect, Debug, Default)]
-#[reflect(Component)]
-/// component gets added when a blueprint spawning is done
-pub struct BlueprintSpawned;
-
-
 use gltf::Gltf as RawGltf;
 
 pub(crate) fn blueprints_prepare_spawn(
@@ -388,26 +383,44 @@ pub struct BlueprintChildrenReady;
 pub struct BlueprintReadyForPostProcess;
 
 
-
+// TODO: disregard blueprints that have been spawned WAIT , we already have BlueprintSpawning
 pub(crate) fn blueprints_scenes_spawned(
     spawned_blueprint_scene_instances: Query<(Entity, Option<&Name>, Option<&Children>, Option<&SpawnTrackRoot>), (With<BlueprintSpawning>, Added<SceneInstance>)>,
     with_blueprint_infos : Query<(Entity, Option<&Name>), With<BlueprintInfo>>,
+
     all_children: Query<&Children>,
+    all_parents: Query<&Parent>,
 
     mut sub_blueprint_trackers: Query<(Entity, &mut SubBlueprintsSpawnTracker, &BlueprintInfo)>,
 
     mut commands: Commands,
+
+    all_names: Query<&Name>
+
 ) {
     for (entity, name, children, track_root) in spawned_blueprint_scene_instances.iter(){
         info!("Done spawning blueprint scene for entity named {:?} (track root: {:?})", name, track_root);
         let mut sub_blueprint_instances: Vec<Entity> = vec![];
+        let mut sub_blueprint_instance_names: Vec<Name> = vec![];
+
         let mut tracker_data: HashMap<Entity, bool> = HashMap::new();
         
+        for parent in all_parents.iter_ancestors(entity) {
+            if with_blueprint_infos.get(parent).is_ok() {
+
+                println!("found a parent with blueprint_info {:?} for {:?}", all_names.get(parent), all_names.get(entity));
+                break;
+            }
+        }
 
         if children.is_some() {
             for child in all_children.iter_descendants(entity) {
                 if with_blueprint_infos.get(child).is_ok() {
                     sub_blueprint_instances.push(child);
+                    if let Ok(nname) = all_names.get(child) {
+                        sub_blueprint_instance_names.push(nname.clone());
+                    }
+
                     tracker_data.insert(child, false);
 
                     if track_root.is_some() {
@@ -424,7 +437,9 @@ pub(crate) fn blueprints_scenes_spawned(
             }
         }
        
-        println!("sub blueprint instances {:?}", sub_blueprint_instances);
+
+
+        println!("sub blueprint instances {:?}", sub_blueprint_instance_names);
         
         // TODO: how about when no sub blueprints are present
         if tracker_data.keys().len() > 0 {
@@ -439,9 +454,7 @@ pub(crate) fn blueprints_scenes_spawned(
 // could be done differently, by notifying each parent of a spawning blueprint that this child is done spawning ?
 // perhaps using component hooks or observers (ie , if a ComponentSpawning + Parent)
 
-use crate::{
+use crate:: CopyComponents;
-    CopyComponents,
-};
 use std::any::TypeId;
 
 
@@ -501,7 +514,6 @@ pub(crate) fn blueprints_transfer_components(
             }
         }
 
-
         commands.entity(original)
             .insert(BlueprintReadyForPostProcess); // Tag the entity so any systems dealing with post processing can now it is now their "turn" 
         // commands.entity(original).remove::<Handle<Scene>>(); // FIXME: if we delete the handle to the scene, things get despawned ! not what we want
@@ -513,7 +525,8 @@ pub(crate) fn blueprints_transfer_components(
         // now check if the current entity is a child blueprint instance of another entity
         // this should always be done last, as children should be finished before the parent can be processed correctly
         if let Some(track_root) = track_root {
-            // println!("got some root {:?}", root_name);
+            let root_name = all_names.get(track_root.0);
+            println!("got some root {:?}", root_name);
             if let Ok((s_entity, mut tracker, bp_info)) = sub_blueprint_trackers.get_mut(track_root.0) {
                 tracker.sub_blueprint_instances.entry(original).or_insert(true);
                 tracker.sub_blueprint_instances.insert(original, true);
@@ -535,44 +548,49 @@ pub(crate) fn blueprints_transfer_components(
     }
 }
 
+
+
 #[derive(Component, Reflect, Debug)]
 #[reflect(Component)]
 pub struct BlueprintReadyForFinalizing;
 
 pub(crate) fn blueprints_finalize_instances(
-    blueprint_instances: Query<(Entity, Option<&Name>), (With<BlueprintSpawning>, With<BlueprintReadyForFinalizing>)>,
+    blueprint_instances: Query<(Entity, Option<&Name>, &BlueprintInfo), (With<BlueprintSpawning>, With<BlueprintReadyForFinalizing>)>,
+    mut blueprint_events: EventWriter<BlueprintEvent>,
     mut commands: Commands,
 ) {
-    for (entity, name) in blueprint_instances.iter() {
+    for (entity, name, blueprint_info) in blueprint_instances.iter() {
         info!("Finalizing blueprint instance {:?}", name);
         commands.entity(entity)
             .remove::<SpawnHere>()
             .remove::<BlueprintSpawning>()
-            .insert(BlueprintSpawned)
+            .remove::<BlueprintReadyForPostProcess>()
+            .insert(BlueprintInstanceReady)
             .insert(Visibility::Visible)
             ;
+
+        blueprint_events.send(BlueprintEvent::InstanceReady {entity: entity, blueprint_name: blueprint_info.name.clone(), blueprint_path: blueprint_info.path.clone()});
     }
 }
 /*
+=> annoying issue with the "nested" useless root node created by blender
+            => distinguish between blueprint instances inside blueprint instances vs blueprint instances inside blueprints ??
+
 BlueprintSpawning
     - Blueprint Load Assets
     - Blueprint Assets Ready: spawn Blueprint's scene
-    - Blueprint Scene Ready:
+    - Blueprint Scene Ready (SceneInstance component is present):
-        - get list of sub Blueprints if any, inject blueprints spawn tracker
+        - get list of sub Blueprints if any, inject sub blueprints spawn tracker
-            => annoying issue with the "nested" useless root node created by blender
+    - Blueprint copy components to original entity, remove useless nodes
-            => distinguish between blueprint instances inside blueprint instances vs blueprint instances inside blueprints ??
+    - Blueprint post process
-    - Blueprint sub_blueprints Ready 
-        if all children are ready
-
-    - Blueprints post process
         - generate aabb (need full hierarchy in its final form)
-        - materials ?
+        - inject materials from library if needed
+    - Blueprint Ready 
+        - bubble information up to parent blueprint instance
+        - if all sub_blueprints are ready => Parent blueprint Instance is ready 
 */
 
 
-
-
-
 // HOT RELOAD
 
 

tools/blenvy/TODO.md

@@ -215,12 +215,17 @@ Blender side:
 Bevy Side:
 - [x] deprecate BlueprintName & BlueprintPath & use BlueprintInfo instead
 - [ ] make blueprint instances invisible until spawning is done to avoid "spawn flash"?
-- [ ] should "blueprint spawned" only be triggered after all its sub blueprints have spawned ? 
+- [ ] restructure blueprint spawning 
-    - [ ] "blueprintInstance ready"/finished
+    - [x] "blueprint ready" only be triggered after all its sub blueprints are ready 
-    BlueprintAssetsLoaded
+    - [x] "blueprintInstance ready"/finished
-    BlueprintSceneSpawned
+        BlueprintAssetsLoaded
-    BlueprintChildrenReady
+        BlueprintSceneSpawned
-    BlueprintReadyForPostProcess
+        BlueprintChildrenReady
+        BlueprintReadyForPostProcess
+    - [ ] fix issues with deeply nested blueprints
+        - perhaps reverse logic by using iter_ascendants
+    - [x] fix materials handling
+    - [ ] fix animations handling
 
 - [ ] simplify testing example:
     - [x] remove use of rapier physics (or even the whole common boilerplate ?)

tools/blenvy/tests/test_bevy_integration.py

@@ -122,9 +122,9 @@ def test_export_complex(setup_data):
     user_asset.path = "audio/fake.mp3"
 
     # we have to cheat, since we cannot rely on the data injected when saving the library file (since we are not saving it as part of the tests)
-    bpy.data.collections["External_blueprint"]["export_path"] = "blueprints/External_blueprint.glb"
+    #bpy.data.collections["External_blueprint"]["export_path"] = "blueprints/External_blueprint.glb"
-    bpy.data.collections["External_blueprint2"]["export_path"] = "blueprints/External_blueprint2.glb"
+    #bpy.data.collections["External_blueprint2"]["export_path"] = "blueprints/External_blueprint2.glb"
-    bpy.data.collections["External_blueprint3"]["export_path"] = "blueprints/External_blueprint3.glb"
+    #bpy.data.collections["External_blueprint3"]["export_path"] = "blueprints/External_blueprint3.glb"
 
     # do the actual exporting
     prepare_and_export()

tools/blenvy/tests/test_bevy_integration_simple.py

@@ -106,7 +106,7 @@ def test_export_complex(setup_data):
     blenvy.auto_export.auto_export = True
     blenvy.auto_export.export_scene_settings = True
     blenvy.auto_export.export_blueprints = True
-    #blenvy.auto_export.export_materials_library = True
+    blenvy.auto_export.export_materials_library = True
 
     bpy.data.scenes['World'].blenvy_scene_type = 'Level' # set scene as main/level scene
     bpy.data.scenes['Library'].blenvy_scene_type = 'Library' # set scene as Library scene