feat(bevy_gltf_components): testing a different approach using only gltf extras (#134)

* not using / tracking gltf files anymore (should avoid issues with scenes vs gltf files)
 * restructured accordingly
 * closes #102
 * closes #111

README.md

@@ -113,6 +113,7 @@ Thanks to all the contributors helping out with this project ! Big kudos to you,
 - [BSDGuyShawn](https://github.com/BSDGuyShawn)
 - [yukkop](https://github.com/yukkop)
 - [killercup](https://github.com/killercup)
+- [janhohenheim ](https://github.com/janhohenheim)
 
 ## License
 

crates/bevy_gltf_blueprints/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bevy_gltf_blueprints"
-version = "0.7.1"
+version = "0.7.3"
 authors = ["Mark 'kaosat-dev' Moissette"]
 description = "Adds the ability to define Blueprints/Prefabs for [Bevy](https://bevyengine.org/) inside gltf files and spawn them in Bevy."
 homepage = "https://github.com/kaosat-dev/Blender_bevy_components_workflow"

crates/bevy_gltf_components/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bevy_gltf_components"
-version = "0.3.1"
+version = "0.3.2"
 authors = ["Mark 'kaosat-dev' Moissette"]
 description = "Allows you to define [Bevy](https://bevyengine.org/) components direclty inside gltf files and instanciate the components on the Bevy side."
 homepage = "https://github.com/kaosat-dev/Blender_bevy_components_workflow"

crates/bevy_gltf_components/src/lib.rs

@@ -1,8 +1,8 @@
 pub mod utils;
 pub use utils::*;
 
-pub mod gltf_to_components;
+pub mod ronstring_to_reflect_component;
-pub use gltf_to_components::*;
+pub use ronstring_to_reflect_component::*;
 
 pub mod process_gltfs;
 pub use process_gltfs::*;
@@ -68,14 +68,12 @@ impl Default for ComponentsFromGltfPlugin {
 
 impl Plugin for ComponentsFromGltfPlugin {
     fn build(&self, app: &mut App) {
-        app.insert_resource(GltfLoadingTracker::new())
+        app.insert_resource(GltfComponentsConfig {
-            .insert_resource(GltfComponentsConfig {
             legacy_mode: self.legacy_mode,
         })
-            .add_systems(Update, (track_new_gltf, process_loaded_scenes))
         .add_systems(
             Update,
-                (process_loaded_scenes).in_set(GltfComponentsSet::Injection),
+            (add_components_from_gltf_extras).in_set(GltfComponentsSet::Injection),
         );
     }
 }

crates/bevy_gltf_components/src/process_gltfs.rs

@@ -1,101 +1,87 @@
-use bevy::asset::AssetPath;
+use bevy::{
-use bevy::gltf::Gltf;
+    core::Name,
-use bevy::utils::HashSet;
+    ecs::{
-use bevy::{asset::LoadState, prelude::*};
+        entity::Entity,
-use std::path::Path;
+        query::Added,
+        reflect::{AppTypeRegistry, ReflectComponent},
+        world::World,
+    },
+    gltf::GltfExtras,
+    hierarchy::Parent,
+    log::debug,
+    reflect::{Reflect, TypeRegistration},
+    utils::HashMap,
+};
 
-use crate::{gltf_extras_to_components, GltfComponentsConfig};
+use crate::{ronstring_to_reflect_component, GltfComponentsConfig};
 
-#[derive(Resource)]
+/// main function: injects components into each entity in gltf files that have `gltf_extras`, using reflection
-/// component to keep track of gltfs' loading state
+pub fn add_components_from_gltf_extras(world: &mut World) {
-pub struct GltfLoadingTracker {
+    let mut extras =
-    pub loading_gltfs: HashSet<Handle<Gltf>>,
+        world.query_filtered::<(Entity, &Name, &GltfExtras, &Parent), Added<GltfExtras>>();
-    pub processed_gltfs: HashSet<String>,
+    let mut entity_components: HashMap<Entity, Vec<(Box<dyn Reflect>, TypeRegistration)>> =
-}
+        HashMap::new();
-impl Default for GltfLoadingTracker {
-    fn default() -> Self {
-        Self::new()
-    }
-}
 
-impl GltfLoadingTracker {
+    let gltf_components_config = world.resource::<GltfComponentsConfig>();
-    pub fn new() -> GltfLoadingTracker {
-        GltfLoadingTracker {
-            loading_gltfs: HashSet::new(),
-            processed_gltfs: HashSet::new(),
-        }
-    }
-    pub fn add_gltf(&mut self, handle: Handle<Gltf>) {
-        self.loading_gltfs.insert(handle);
-    }
-}
 
-pub fn track_new_gltf(
+    for (entity, name, extra, parent) in extras.iter(world) {
-    mut tracker: ResMut<GltfLoadingTracker>,
-    mut events: EventReader<AssetEvent<Gltf>>,
-    asset_server: Res<AssetServer>,
-) {
-    for event in events.read() {
-        if let AssetEvent::Added { id } = event {
-            let handle = asset_server.get_id_handle(*id);
-            if let Some(handle) = handle {
-                tracker.add_gltf(handle.clone());
-                debug!("gltf created {:?}", handle);
-            } else {
-                let asset_path = asset_server
-                    .get_path(*id)
-                    .unwrap_or(AssetPath::from_path(Path::new("n/a"))); // will unfortunatly not work, will do a PR/ discussion at the Bevy level, leaving for reference, would be very practical
-                warn!(
-                    "a gltf file ({:?}) has no handle available, cannot inject components",
-                    asset_path
-                );
-            }
-        }
-    }
-    events.clear();
-}
-
-pub fn process_loaded_scenes(
-    mut gltfs: ResMut<Assets<Gltf>>,
-    mut tracker: ResMut<GltfLoadingTracker>,
-    mut scenes: ResMut<Assets<Scene>>,
-    app_type_registry: Res<AppTypeRegistry>,
-    asset_server: Res<AssetServer>,
-    gltf_components_config: Res<GltfComponentsConfig>,
-) {
-    let mut loaded_gltfs = Vec::new();
-    for gltf in &tracker.loading_gltfs {
         debug!(
-            "checking for loaded gltfs {:?}",
+            "Name: {}, entity {:?}, parent: {:?}, extras {:?}",
-            asset_server.get_load_state(gltf)
+            name, entity, parent, extra
         );
 
-        if let Some(load_state) = asset_server.get_load_state(gltf.clone()) {
+        let type_registry: &AppTypeRegistry = world.resource();
-            if load_state == LoadState::Loaded {
+        let type_registry = type_registry.read();
-                debug!("Adding scene to processing list");
+        let reflect_components = ronstring_to_reflect_component(
-                loaded_gltfs.push(gltf.clone());
+            &extra.value,
-            }
+            &type_registry,
-        }
-    }
-
-    let type_registry = app_type_registry.read();
-
-    for gltf_handle in &loaded_gltfs {
-        if let Some(gltf) = gltfs.get_mut(gltf_handle) {
-            gltf_extras_to_components(
-                gltf,
-                &mut scenes,
-                &*type_registry,
             gltf_components_config.legacy_mode,
         );
 
-            if let Some(path) = gltf_handle.path() {
+        // we assign the components specified /xxx_components objects to their parent node
-                tracker.processed_gltfs.insert(path.to_string());
+        let mut target_entity = entity;
+        // if the node contains "components" or ends with "_pa" (ie add to parent), the components will not be added to the entity itself but to its parent
+        // this is mostly used for Blender collections
+        if name.as_str().contains("components") || name.as_str().ends_with("_pa") {
+            debug!("adding components to parent");
+            target_entity = parent.get();
         }
+        debug!("adding to {:?}", target_entity);
+
+        // if there where already components set to be added to this entity (for example when entity_data was refering to a parent), update the vec of entity_components accordingly
+        // this allows for example blender collection to provide basic ecs data & the instances to override/ define their own values
+        if entity_components.contains_key(&target_entity) {
+            let mut updated_components: Vec<(Box<dyn Reflect>, TypeRegistration)> = Vec::new();
+            let current_components = &entity_components[&target_entity];
+            // first inject the current components
+            for (component, type_registration) in current_components {
+                updated_components.push((component.clone_value(), type_registration.clone()));
+            }
+            // then inject the new components: this also enables overwrite components set in the collection
+            for (component, type_registration) in reflect_components {
+                updated_components.push((component.clone_value(), type_registration));
+            }
+            entity_components.insert(target_entity, updated_components);
         } else {
-            warn!("could not find gltf asset, cannot process it");
+            entity_components.insert(target_entity, reflect_components);
-        }
+        }
-        tracker.loading_gltfs.remove(gltf_handle);
+    }
-        debug!("Done loading gltf file");
+
+    for (entity, components) in entity_components {
+        if !components.is_empty() {
+            debug!("--entity {:?}, components {}", entity, components.len());
+        }
+        for (component, type_registration) in components {
+            let mut entity_mut = world.entity_mut(entity);
+            debug!(
+                "------adding {} {:?}",
+                component.get_represented_type_info().unwrap().type_path(),
+                component
+            );
+            type_registration
+                .data::<ReflectComponent>()
+                .unwrap()
+                .insert(&mut entity_mut, &*component); // TODO: how can we insert any additional components "by hand" here ?
+        }
     }
 }

crates/bevy_gltf_components/src/ronstring_to_reflect_component.rs

@@ -1,37 +1,19 @@
-use bevy::ecs::component::Component;
+use bevy::log::{debug, warn};
-use bevy::render::color::Color;
+use bevy::reflect::serde::UntypedReflectDeserializer;
-use core::ops::Deref;
+use bevy::reflect::{Reflect, TypeInfo, TypeRegistration, TypeRegistry};
+use bevy::utils::HashMap;
 use ron::Value;
 use serde::de::DeserializeSeed;
 
-use bevy::ecs::{entity::Entity, reflect::ReflectComponent};
-use bevy::gltf::{Gltf, GltfExtras};
-use bevy::reflect::serde::UntypedReflectDeserializer;
-use bevy::reflect::{Reflect, TypeInfo, TypeRegistry};
-use bevy::scene::Scene;
-use bevy::utils::HashMap;
-use bevy::{
-    log::{debug, warn},
-    prelude::{Assets, Name, Parent, ResMut},
-};
-
 use super::capitalize_first_letter;
 
-#[derive(Component, Reflect, Default, Debug)]
-#[reflect(Component)]
-struct TuppleTestColor(Color);
-
-#[derive(Component, Reflect, Default, Debug)]
-#[reflect(Component)]
-pub struct VecOfColors(Vec<Color>);
-
 pub fn ronstring_to_reflect_component(
     ron_string: &str,
     type_registry: &TypeRegistry,
     simplified_types: bool,
-) -> Vec<Box<dyn Reflect>> {
+) -> Vec<(Box<dyn Reflect>, TypeRegistration)> {
     let lookup: HashMap<String, Value> = ron::from_str(ron_string).unwrap();
-    let mut components: Vec<Box<dyn Reflect>> = Vec::new();
+    let mut components: Vec<(Box<dyn Reflect>, TypeRegistration)> = Vec::new();
     for (key, value) in lookup.into_iter() {
         let type_string = key.replace("component: ", "").trim().to_string();
         let capitalized_type_name = capitalize_first_letter(type_string.as_str());
@@ -111,7 +93,8 @@ pub fn ronstring_to_reflect_component(
                 }
             }
 
-            // println!("parsed value {}",parsed_value);
+            // FIXME: waaait this should be part of the legacy mode as it modifies the ron data ???
+            // so it means the values generated by the Blende add-on are incomplete (trivial to fix, but still)
             if parsed_value.is_empty() {
                 parsed_value = "()".to_string();
             }
@@ -144,7 +127,7 @@ pub fn ronstring_to_reflect_component(
             debug!("component {:?}", component);
             debug!("real type {:?}", component.get_represented_type_info());
 
-            components.push(component);
+            components.push((component, type_registration.clone()));
             debug!("found type registration for {}", capitalized_type_name);
         } else {
             warn!("no type registration for {}", capitalized_type_name);
@@ -152,107 +135,3 @@ pub fn ronstring_to_reflect_component(
     }
     components
 }
-
-/// main function: injects components into each entity in gltf files that have `gltf_extras`, using reflection
-pub fn gltf_extras_to_components(
-    gltf: &mut Gltf,
-    scenes: &mut ResMut<Assets<Scene>>,
-    type_registry: impl Deref<Target = TypeRegistry>,
-    legacy_mode: bool,
-) {
-    let mut added_components = 0;
-    let simplified_types = legacy_mode;
-    if simplified_types {
-        warn!("using simplified component definitions is deprecated since 0.3, prefer defining components with real ron values (use the bevy_components tool for Blender for simplicity) ");
-    }
-    for (_name, scene) in &gltf.named_scenes {
-        debug!("gltf: scene name {:?}", _name);
-
-        let scene = scenes.get_mut(scene).unwrap();
-
-        let mut query = scene.world.query::<(Entity, &Name, &GltfExtras, &Parent)>();
-        let mut entity_components: HashMap<Entity, Vec<Box<dyn Reflect>>> = HashMap::new();
-        for (entity, name, extras, parent) in query.iter(&scene.world) {
-            debug!("Name: {}, entity {:?}, parent: {:?}", name, entity, parent);
-            let reflect_components =
-                ronstring_to_reflect_component(&extras.value, &type_registry, simplified_types);
-            added_components = reflect_components.len();
-            debug!("Found components {}", added_components);
-
-            // we assign the components specified /xxx_components objects to their parent node
-            let mut target_entity = entity;
-            // if the node contains "components" or ends with "_pa" (ie add to parent), the components will not be added to the entity itself but to its parent
-            // this is mostly used for Blender collections
-            if name.as_str().contains("components") || name.as_str().ends_with("_pa") {
-                debug!("adding components to parent");
-                target_entity = parent.get();
-            }
-
-            debug!("adding to {:?}", target_entity);
-
-            // if there where already components set to be added to this entity (for example when entity_data was refering to a parent), update the vec of entity_components accordingly
-            // this allows for example blender collection to provide basic ecs data & the instances to override/ define their own values
-            if entity_components.contains_key(&target_entity) {
-                let mut updated_components: Vec<Box<dyn Reflect>> = Vec::new();
-                let current_components = &entity_components[&target_entity];
-                // first inject the current components
-                for component in current_components {
-                    updated_components.push(component.clone_value());
-                }
-                // then inject the new components: this also enables overwrite components set in the collection
-                for component in reflect_components {
-                    updated_components.push(component.clone_value());
-                }
-                entity_components.insert(target_entity, updated_components);
-            } else {
-                entity_components.insert(target_entity, reflect_components);
-            }
-            // shorthand, did not manage to get it working
-            /*  entity_components.insert(
-            target_entity,
-            if entity_components.contains_key(&target_entity) {
-              entity_components[&target_entity].push(reflect_components) } else { reflect_components }
-            );*/
-
-            debug!("-----value {:?}", &extras.value);
-        }
-
-        // GltfNode
-        // find a way to link this name to the current entity ? => WOULD BE VERY USEFULL for animations & co !!
-        debug!("done pre-processing components, now adding them to entities");
-        for (entity, components) in entity_components {
-            if !components.is_empty() {
-                debug!("--entity {:?}, components {}", entity, components.len());
-            }
-            for component in components {
-                let mut entity_mut = scene.world.entity_mut(entity);
-                debug!(
-                    "------adding {} {:?}",
-                    component.get_represented_type_info().unwrap().type_path(),
-                    component
-                );
-
-                let component_type_path =
-                    component.get_represented_type_info().unwrap().type_path();
-                type_registry
-                    .get_with_type_path(component_type_path)
-                    .unwrap() // Component was successfully deserialized, it has to be in the registry
-                    .data::<ReflectComponent>()
-                    .unwrap() // Hopefully, the component deserializer ensures those are components
-                    .insert(&mut entity_mut, &*component);
-
-                // debug!("all components {:?}", scene.world.entity(entity).archetype().components());
-                // scene.world.components().
-                // TODO: how can we insert any additional components "by hand" here ?
-            }
-            // let entity_mut = scene.world.entity_mut(entity);
-            // let archetype = entity_mut.archetype().clone();
-            // let _all_components = archetype.components();
-
-            if added_components > 0 {
-                debug!("------done adding {} components", added_components);
-            }
-        }
-    }
-    debug!("done injecting components from gltf_extras");
-}