refactor: get models fully working

Signed-off-by: Schmarni <marnistromer@gmail.com>

Cargo.toml

@@ -26,6 +26,14 @@ path = "src/main.rs"
 profile_tokio = ["dep:console-subscriber", "tokio/tracing"]
 profile_app = ["dep:tracing-tracy"]
 
+# Enable a small amount of optimization in the dev profile.
+[profile.dev]
+opt-level = 1
+
+# Enable a large amount of optimization in the dev profile for dependencies.
+[profile.dev.package."*"]
+opt-level = 3
+
 [package.metadata.appimage]
 auto_link = true
 auto_link_exclude_list = [

src/bevy_plugin.rs

@@ -1,3 +1,5 @@
+use std::ops::Deref;
+
 use bevy::{
 	app::MainScheduleOrder,
 	ecs::schedule::{ExecutorKind, ScheduleLabel},
@@ -6,13 +8,25 @@ use bevy::{
 };
 use bevy_mod_openxr::session::OxrSession;
 use bevy_mod_xr::session::{session_available, XrFirst, XrSessionCreated};
+use once_cell::sync::OnceCell;
 use openxr::ReferenceSpaceType;
 use stardust_xr::values::color::{color_space::LinearRgb, AlphaColor, Rgb};
 
-use crate::objects::Inputs;
-
 pub struct StardustBevyPlugin;
 
+pub static DESTROY_ENTITY: DestroySender = DestroySender(OnceCell::new());
+
+pub struct DestroySender(OnceCell<crossbeam_channel::Sender<Entity>>);
+impl Deref for DestroySender {
+	type Target = crossbeam_channel::Sender<Entity>;
+
+	fn deref(&self) -> &Self::Target {
+		self.0.get().unwrap()
+	}
+}
+#[derive(Resource, Deref)]
+struct DestroyEntityReader(crossbeam_channel::Receiver<Entity>);
+
 #[derive(Resource, Deref)]
 pub struct DbusConnection(pub zbus::Connection);
 
@@ -22,6 +36,12 @@ pub struct InputUpdate;
 pub struct StardustFirst;
 impl Plugin for StardustBevyPlugin {
 	fn build(&self, app: &mut App) {
+		let (tx, rx) = crossbeam_channel::unbounded();
+		DESTROY_ENTITY
+			.0
+			.set(tx)
+			.expect("unable to set destroy entity sender, yell at schmarni pls thx");
+		app.insert_resource(DestroyEntityReader(rx));
 		app.init_schedule(StardustExtract);
 		let labels = &mut app.world_mut().resource_mut::<MainScheduleOrder>().labels;
 		info!("test: {labels:?}");
@@ -42,9 +62,24 @@ impl Plugin for StardustBevyPlugin {
 			panic!("first schedule was not XrFirst!");
 		}
 		labels.insert(0, (StardustFirst).intern());
+		app.add_systems(First, yeet_entities);
 	}
 }
 
+fn yeet_entities(
+	mut cmds: Commands,
+	query: Query<Entity, With<TemporaryEntity>>,
+	reader: Res<DestroyEntityReader>,
+) {
+	query
+		.iter()
+		.for_each(|e| cmds.entity(e).despawn_recursive());
+	reader
+		.0
+		.try_iter()
+		.for_each(|e| cmds.entity(e).despawn_recursive());
+}
+
 fn make_view_space(mut cmds: Commands, session: Res<OxrSession>) {
 	// idk what errors this function returns
 	let view_space = session
@@ -58,17 +93,6 @@ fn make_view_space(mut cmds: Commands, session: Res<OxrSession>) {
 fn spawn_camera(mut cmds: Commands) {
 	cmds.spawn((Camera3d::default(), ViewLocation));
 }
-
-#[derive(Deref, DerefMut, Resource)]
-pub struct BevyToStardustEvents(pub Vec<BevyToStardustEvent>);
-pub enum BevyToStardustEvent {
-	InputsCreated(Inputs),
-	SessionDestroyed,
-	SessionEnding,
-	SessionCreated(OxrSession),
-	MainSessionVisible(bool),
-}
-
 pub trait StardustAabb3dExt {
 	fn grown_box(&self, aabb: &Self, opt_box_transform: Option<impl Into<Mat4>>) -> Self;
 	fn grown_point(&self, pt: impl Into<Vec3>) -> Self;

src/main.rs

@@ -12,15 +12,16 @@ use crate::core::destroy_queue;
 // use crate::nodes::items::camera;
 use crate::nodes::{audio, drawable, input};
 
-use bevy::app::{App, PluginGroup, PluginsState, Startup, Update};
+use bevy::app::{App, PluginGroup, PluginsState, PostUpdate, Startup, Update};
 use bevy::asset::{AssetServer, Handle};
+use bevy::color::Color;
 use bevy::core_pipeline::Skybox;
 use bevy::image::Image;
 use bevy::log::LogPlugin;
 use bevy::pbr::StandardMaterial;
 use bevy::prelude::{
 	on_event, resource_added, Camera3d, ClearColor, Commands, Entity, EventReader,
-	IntoSystemConfigs, Local, Query, Res, Resource, With, World,
+	IntoSystemConfigs, Local, Query, Res, ResMut, Resource, Transform, With, World,
 };
 use bevy::render::pipelined_rendering::PipelinedRenderingPlugin;
 use bevy::time::Time;
@@ -34,9 +35,11 @@ use bevy_mod_openxr::init::{should_run_frame_loop, OxrInitPlugin};
 use bevy_mod_openxr::render::{update_cameras, OxrRenderPlugin};
 use bevy_mod_openxr::resources::{OxrFrameState, OxrFrameWaiter, OxrGraphicsInfo};
 use bevy_mod_openxr::session::OxrSession;
+use bevy_mod_openxr::spaces::OxrSpaceExt;
 use bevy_mod_openxr::types::{AppInfo, Version};
 use bevy_mod_openxr::{add_xr_plugins, openxr_session_running};
-use bevy_mod_xr::session::{XrFirst, XrSessionCreated, XrSessionPlugin};
+use bevy_mod_xr::session::{XrFirst, XrPreDestroySession, XrSessionCreated, XrSessionPlugin};
+use bevy_mod_xr::spaces::XrPrimaryReferenceSpace;
 use bevy_plugin::{DbusConnection, InputUpdate, StardustBevyPlugin, StardustFirst};
 use clap::Parser;
 use core::client::Client;
@@ -47,6 +50,7 @@ use nodes::drawable::lines::BevyLinesPlugin;
 use nodes::drawable::model::StardustModelPlugin;
 use nodes::drawable::text::StardustTextPlugin;
 use objects::input::sk_controller::StardustControllerPlugin;
+use objects::input::sk_hand::StardustHandPlugin;
 use objects::ServerObjects;
 use once_cell::sync::OnceCell;
 use openxr::OverlaySessionCreateFlagsEXTX;
@@ -260,7 +264,7 @@ fn stereokit_loop(
 						exts
 					},
 					blend_modes: Some(vec![
-						// openxr::EnvironmentBlendMode::ALPHA_BLEND,
+						openxr::EnvironmentBlendMode::ALPHA_BLEND,
 						openxr::EnvironmentBlendMode::OPAQUE,
 					]),
 					synchronous_pipeline_compilation: false,
@@ -283,6 +287,7 @@ fn stereokit_loop(
 	bevy_app.add_plugins((
 		BevyLinesPlugin,
 		StardustModelPlugin,
+		StardustHandPlugin,
 		StardustTextPlugin,
 		StardustSoundPlugin,
 		StardustControllerPlugin,
@@ -326,10 +331,36 @@ fn stereokit_loop(
 			cams.iter().for_each(|e| {
 				cmds.entity(e).remove::<Skybox>();
 			});
+			cmds.insert_resource(ClearColor(Color::NONE));
 		}
 		*last_hidden = env_hidden;
 	}
 	bevy_app.add_systems(XrSessionCreated, update_background);
+	bevy_app.add_systems(
+		PostUpdate,
+		(|mut objects: ResMut<ServerObjects>,
+		  ref_space: Res<XrPrimaryReferenceSpace>,
+		  session: Res<OxrSession>| {
+			objects
+				.ref_space
+				.replace(unsafe { ref_space.as_openxr_space(&session) });
+			objects.view_space.replace(
+				session
+					.deref()
+					.deref()
+					.create_reference_space(
+						openxr::ReferenceSpaceType::VIEW,
+						openxr::Posef::IDENTITY,
+					)
+					.unwrap(),
+			);
+		})
+		.run_if(on_event::<bevy_mod_xr::session::XrSessionCreatedEvent>),
+	);
+	bevy_app.add_systems(XrPreDestroySession, |mut objetcs: ResMut<ServerObjects>| {
+		objetcs.ref_space = None;
+		objetcs.view_space = None;
+	});
 	bevy_app.add_systems(
 		Update,
 		update_background.run_if(on_event::<OxrOverlaySessionEvent>),

src/nodes/audio.rs

@@ -163,8 +163,18 @@ impl Drop for Sound {
 	}
 }
 
+<<<<<<< HEAD
+=======
+<<<<<<< HEAD
+create_interface!(AudioInterface);
+>>>>>>> 0ec4c0f (refactor: get models fully working)
 struct AudioInterface;
 impl InterfaceAspect for AudioInterface {
+=======
+pub fn update() {}
+
+impl InterfaceAspect for Interface {
+>>>>>>> 2f5c92d (refactor: get models fully working)
 	#[doc = "Create a sound node. WAV and MP3 are supported."]
 	fn create_sound(
 		_node: Arc<Node>,

src/nodes/drawable/lines.rs

@@ -169,7 +169,7 @@ pub fn draw_all(
 	let mat_handle = materials.add(material);
 	for lines in LINES_REGISTRY.get_valid_contents() {
 		if let Some(node) = lines.space.node() {
-			if node.enabled() {
+			if node.enabled() && !lines.data.lock().is_empty() {
 				// Does this rebuild the mesh every frame? yes, is this problematic? probably,
 				// would a shader work better? yes, do i care? not right now
 				let mut mesh = Mesh::new(

src/nodes/drawable/model.rs

@@ -1,6 +1,6 @@
 use super::{MaterialParameter, ModelAspect, ModelPartAspect, MODEL_PART_ASPECT_ALIAS_INFO};
 use crate::bail;
-use crate::bevy_plugin::MainWorldEntity;
+use crate::bevy_plugin::{MainWorldEntity, DESTROY_ENTITY};
 use crate::core::client::Client;
 use crate::core::error::Result;
 use crate::core::registry::Registry;
@@ -8,8 +8,8 @@ use crate::core::resource::get_resource_file;
 use crate::nodes::alias::{Alias, AliasList};
 use crate::nodes::spatial::Spatial;
 use crate::nodes::Node;
-use crate::DefaultMaterial;
-use bevy::app::{Plugin, PostUpdate};
+use crate::{DefaultMaterial, TOKIO};
+use bevy::app::{Plugin, PostUpdate, PreUpdate, Update};
 use bevy::asset::{AssetServer, Assets};
 use bevy::color::{Alpha, Color, LinearRgba, Srgba};
 use bevy::core::Name;
@@ -18,23 +18,27 @@ use bevy::math::bounding::Aabb3d;
 use bevy::pbr::MeshMaterial3d;
 use bevy::prelude::AlphaMode;
 use bevy::prelude::{
-	Children, Commands, Component, Deref, Entity, HierarchyQueryExt, Mesh3d, Parent, Query, Res,
-	ResMut, Resource, Transform, Visibility, With, Without,
+	BuildChildrenTransformExt, Children, Commands, Component, Deref, Entity, Has,
+	HierarchyQueryExt, Mesh3d, Parent, Query, Res, ResMut, Resource, Transform, Visibility, With,
+	Without,
 };
 use bevy::reflect::{GetField, PartialReflect, Reflect};
 use bevy::render::primitives::Aabb;
 use bevy::scene::SceneRoot;
 use color_eyre::eyre::eyre;
-use glam::{Vec2, Vec3};
+use bevy::tasks::futures_lite::FutureExt;
+use glam::{Mat4, Vec2, Vec3};
 use once_cell::sync::OnceCell;
 use parking_lot::Mutex;
 use rustc_hash::FxHashMap;
 use stardust_xr::values::ResourceID;
-use tracing::{error, warn};
+use tokio::sync::Notify;
+use tracing::{error, info, warn};
 
 use std::ffi::OsStr;
+use std::future::IntoFuture;
 use std::ops::Deref;
-use std::path::PathBuf;
+use std::path::{self, PathBuf};
 use std::sync::{Arc, Weak};
 
 static MODEL_REGISTRY: Registry<Model> = Registry::new();
@@ -132,7 +136,7 @@ impl MaterialParameter {
 }
 
 pub struct ModelPart {
-	entity: MainWorldEntity,
+	entity: OnceCell<Entity>,
 	path: String,
 	space: Arc<Spatial>,
 	model: Weak<Model>,
@@ -142,7 +146,7 @@ pub struct ModelPart {
 }
 
 #[derive(Component, Clone)]
-pub struct StardustModel(Arc<Model>);
+pub struct StardustModel(Weak<Model>);
 #[derive(Component, Clone)]
 pub struct UnprocessedModel;
 pub struct StardustModelPlugin;
@@ -151,7 +155,10 @@ impl Plugin for StardustModelPlugin {
 		let (tx, rx) = crossbeam_channel::unbounded();
 		LOAD_MODEL_SENDER.set(tx);
 		app.insert_resource(LoadModelReader(rx));
-		app.add_systems(PostUpdate, create_model_parts_for_loaded_models);
+		app.add_systems(Update, create_model_parts_for_loaded_models);
+		app.add_systems(PreUpdate, load_models);
+		app.add_systems(PostUpdate, update_models);
+		app.add_systems(PostUpdate, update_model_parts);
 	}
 }
 static LOAD_MODEL_SENDER: OnceCell<crossbeam_channel::Sender<(PathBuf, Arc<Model>)>> =
@@ -161,8 +168,11 @@ struct LoadModelReader(crossbeam_channel::Receiver<(PathBuf, Arc<Model>)>);
 
 fn update_models(mut query: Query<(&StardustModel, &mut Visibility, &mut Transform)>) {
 	for (model, mut vis, mut transform) in query.iter_mut() {
-		*transform = Transform::from_matrix(model.0.space.global_transform());
-		if let Some(node) = model.0.space.node() {
+		let Some(model) = model.0.upgrade() else {
+			continue;
+		};
+		*transform = Transform::from_matrix(model.space.global_transform());
+		if let Some(node) = model.space.node() {
 			*vis = match node.enabled() {
 				true => Visibility::Inherited,
 				false => Visibility::Hidden,
@@ -177,7 +187,7 @@ fn load_models(rx: Res<LoadModelReader>, mut cmds: Commands, asset_server: Res<A
 		let entity = cmds
 			.spawn((
 				SceneRoot(handle),
-				StardustModel(model.clone()),
+				StardustModel(Arc::downgrade(&model)),
 				UnprocessedModel,
 			))
 			.id();
@@ -186,29 +196,32 @@ fn load_models(rx: Res<LoadModelReader>, mut cmds: Commands, asset_server: Res<A
 }
 
 fn update_model_parts(
-	models: Query<&StardustModel>,
+	models: Query<&StardustModel, Without<UnprocessedModel>>,
 	mut mats: ResMut<Assets<DefaultMaterial>>,
 	mut part_query: Query<(
 		&mut Transform,
 		&mut MeshMaterial3d<DefaultMaterial>,
-		&mut Mesh3d,
+		Has<Parent>,
 	)>,
+	mut cmds: Commands,
 ) {
 	for model in &models {
-		let model = &model.0;
+		let Some(model) = model.0.upgrade() else {
+			continue;
+		};
 		for part in model.parts.lock().iter() {
-			let Ok((mut transform, mut mat, mut _mesh)) = part_query.get_mut(*part.entity) else {
+			let Some((entity, (mut transform, mut mat, has_parent))) = part
+				.entity
+				.get()
+				.and_then(|e| Some((*e, part_query.get_mut(*e).ok()?)))
+			else {
 				continue;
 			};
-			*transform = Transform::from_matrix(Spatial::space_to_space_matrix(
-				Some(&part.space),
-				Some(&model.space),
-			));
-			if let Some(material_replacement) = part.pending_material_replacement.lock().take() {
-				let material = material_replacement.deref().clone();
-				let mat_handle = mats.add(material);
-				mat.0 = mat_handle;
+			if has_parent {
+				cmds.entity(entity).remove_parent_in_place();
 			}
+			*transform = Transform::from_matrix(part.space.global_transform());
+
 			// todo: find all materials with identical parameters and batch them into 1 material again
 			'mat_params: {
 				let mut material_parameters = part.pending_material_parameters.lock();
@@ -237,36 +250,41 @@ fn update_model_parts(
 
 fn get_path(
 	entity: Entity,
-	query: &Query<(Entity, Option<&Parent>, &Transform, &Name, &Aabb), Without<SceneRoot>>,
-) -> Option<String> {
-	let (_, parent, _, name, _) = query.get(entity).ok()?;
-	let next = parent.and_then(|p| get_path(p.get(), query));
-	match next {
-		Some(next) => Some(format!("{name}/{next}")),
-		None => Some(name.to_string()),
-	}
+	query: &Query<(&Parent, &Name), Without<SceneRoot>>,
+	mut in_vec: Vec<String>,
+) -> Vec<String> {
+	let Ok((parent, name)) = query.get(entity) else {
+		return in_vec;
+	};
+	in_vec.push(name.to_string());
+	get_path(parent.get(), query, in_vec)
 }
 
 fn create_model_parts_for_loaded_models(
-	query: Query<(Entity, &StardustModel), With<UnprocessedModel>>,
+	query: Query<(Entity, &StardustModel), (With<UnprocessedModel>, With<Children>)>,
 	children: Query<&Children>,
-	gltf_model_parts: Query<
-		(Entity, Option<&Parent>, &Transform, &Name, &Aabb),
-		Without<SceneRoot>,
-	>,
+	gltf_model_parts: Query<(Entity, &Transform, &Aabb), Without<SceneRoot>>,
+	name_query: Query<(&Parent, &Name), Without<SceneRoot>>,
 	mut cmds: Commands,
 ) {
 	for (entity, model) in &query {
-		let model = &model.0;
-		let mut parts = model.parts.lock();
-		cmds.entity(entity).remove::<UnprocessedModel>();
-		for (entity, parent, transform, name, aabb) in children
-			.iter_descendants(entity)
+		info!("creating parts!");
+		let Some(model) = model.0.upgrade() else {
+			continue;
+		};
+		// let mut parts = model.parts.lock();
+		let mut parts = Vec::<Arc<ModelPart>>::new();
+		for (entity, transform, aabb) in children
+			.iter_descendants_depth_first(entity)
 			.filter_map(|e| gltf_model_parts.get(e).ok())
 		{
-			let parent_part = parent
-				.and_then(|e| gltf_model_parts.get(e.get()).ok())
-				.and_then(|(e, _, _, _, _)| parts.iter().find(|v| v.entity.0 == e));
+			let mut path_parts = get_path(entity, &name_query, Vec::new());
+			path_parts.remove(0);
+			path_parts.reverse();
+			let part_path = path_parts.join("/");
+			path_parts.pop();
+			let parent_path = path_parts.join("/");
+			let parent_part = parts.iter().find(|v| v.path == parent_path);
 
 			let Some(stardust_model_part) = model.space.node() else {
 				continue;
@@ -274,22 +292,51 @@ fn create_model_parts_for_loaded_models(
 			let Some(client) = stardust_model_part.get_client() else {
 				continue;
 			};
-			let part_path = get_path(entity, &gltf_model_parts).unwrap_or_else(|| name.to_string());
+			let model_part = model
+				.parts
+				.lock()
+				.iter()
+				.find(|v| v.path == part_path)
+				.cloned()
+				.map(|v| {
+					*v.space.bounding_box_calc.lock() = Aabb3d::new(aabb.center, aabb.half_extents);
+					if v.entity.set(entity).is_err() {
+						error!(
+							"trying to set entity for already init model part?!
+							please yell at schmarni if you see this"
+						);
+					};
 
-			let node = client.scenegraph.add_node(Node::generate(&client, false));
-			let spatial_parent = parent_part
-				.map(|n| n.space.clone())
-				.unwrap_or_else(|| model.space.clone());
+					if let Err(err) = v.space.set_spatial_parent(Some(
+						parent_part.map(|n| &n.space).unwrap_or_else(|| {
+							info!("model is spatial parent");
+							&model.space
+						}),
+					)) {
+						error!("error setting spatial parent for existing model part: {err}");
+					}
+					v.space.set_local_transform(transform.compute_matrix());
+					info!("not fresh {}", &v.path);
+					v
+				})
+				.unwrap_or_else(|| {
+					let node = client.scenegraph.add_node(Node::generate(&client, false));
+					let spatial_parent =
+						parent_part.map(|n| n.space.clone()).unwrap_or_else(|| {
+							info!("model is spatial parent");
+							model.space.clone()
+						});
 
-			let space = Spatial::add_to(
-				&node,
-				Some(spatial_parent),
-				transform.compute_matrix(),
-				false,
-			);
+					let space = Spatial::add_to(
+						&node,
+						Some(spatial_parent),
+						transform.compute_matrix(),
+						false,
+					);
 
-			*space.bounding_box_calc.lock() = Aabb3d::new(aabb.center, aabb.half_extents);
+					*space.bounding_box_calc.lock() = Aabb3d::new(aabb.center, aabb.half_extents);
 
+<<<<<<< HEAD
 			let model_part = Arc::new(ModelPart {
 				entity: MainWorldEntity(entity),
 				path: part_path,
@@ -300,8 +347,26 @@ fn create_model_parts_for_loaded_models(
 				aliases: AliasList::default(),
 			});
 			node.add_aspect_raw(model_part.clone());
+=======
+					let model_part = Arc::new(ModelPart {
+						entity: OnceCell::from(entity),
+						path: part_path,
+						space,
+						model: Arc::downgrade(&model),
+						pending_material_parameters: Mutex::new(FxHashMap::default()),
+						pending_material_replacement: Mutex::new(None),
+						aliases: AliasList::default(),
+					});
+					node.add_aspect_raw(model_part.clone());
+					info!("fresh {}", &model_part.path);
+					model_part
+				});
+>>>>>>> 0ec4c0f (refactor: get models fully working)
 			parts.push(model_part.clone());
 		}
+		cmds.entity(entity).remove::<UnprocessedModel>();
+		info!("created parts! {}", parts.len());
+		*model.parts.lock() = parts;
 	}
 }
 
@@ -375,11 +440,43 @@ impl ModelAspect for Model {
 		part_path: String,
 	) -> Result<()> {
 		let model = node.get_aspect::<Model>()?;
+<<<<<<< HEAD
 		let parts = model.parts.lock();
 		let Some(part) = parts.iter().find(|p| p.path == part_path) else {
 			let paths = parts.iter().map(|p| &p.path).collect::<Vec<_>>();
 			bail!("Couldn't find model part at path {part_path}, all available paths: {paths:?}",);
 		};
+=======
+		let mut parts = model.parts.lock();
+		let part =
+			parts
+				.iter()
+				.find(|p| p.path == part_path)
+				.cloned()
+				.unwrap_or_else(|| {
+					let paths = parts.iter().map(|p| &p.path).collect::<Vec<_>>();
+					error!("Couldn't find model part at path {part_path}, all available paths: {paths:?}");
+
+					let node = calling_client
+						.scenegraph
+						.add_node(Node::generate(&calling_client, false));
+
+					let space = Spatial::add_to(&node, None, Mat4::IDENTITY, false);
+
+					let model_part = Arc::new(ModelPart {
+						entity: OnceCell::new(),
+						path: part_path,
+						space,
+						model: Arc::downgrade(&model),
+						pending_material_parameters: Mutex::new(FxHashMap::default()),
+						pending_material_replacement: Mutex::new(None),
+						aliases: AliasList::default(),
+					});
+					node.add_aspect_raw(model_part.clone());
+					parts.push(model_part.clone());
+					model_part
+				});
+>>>>>>> 0ec4c0f (refactor: get models fully working)
 		Alias::create_with_id(
 			&part.space.node().unwrap(),
 			&calling_client,
@@ -390,8 +487,18 @@ impl ModelAspect for Model {
 		Ok(())
 	}
 }
+impl Drop for ModelPart {
+	fn drop(&mut self) {
+		if let Some(e) = self.entity.get() {
+			_ = DESTROY_ENTITY.send(*e);
+		}
+	}
+}
 impl Drop for Model {
 	fn drop(&mut self) {
+		if let Some(e) = self.entity.get() {
+			_ = DESTROY_ENTITY.send(*e);
+		}
 		MODEL_REGISTRY.remove(self);
 	}
 }

src/objects/input/sk_hand.rs

@@ -10,6 +10,7 @@ use crate::nodes::{
 };
 use crate::objects::{ObjectHandle, SpatialRef};
 use crate::DefaultMaterial;
+use bevy::app::{Plugin, PostUpdate};
 use bevy::asset::{AssetServer, Assets, Handle};
 use bevy::prelude::{Commands, Component, Entity, Query, Res, ResMut};
 use bevy_mod_openxr::helper_traits::{ToQuat, ToVec3};
@@ -17,6 +18,7 @@ use bevy_mod_openxr::resources::OxrFrameState;
 use bevy_mod_openxr::session::OxrSession;
 use bevy_mod_openxr::spaces::OxrSpaceLocationFlags;
 use bevy_mod_xr::hands::{HandBone, HandSide};
+use bevy_mod_xr::session::XrSessionCreated;
 use bevy_mod_xr::spaces::XrPrimaryReferenceSpace;
 use color_eyre::eyre::Result;
 use glam::{Mat4, Quat, Vec3};
@@ -34,6 +36,14 @@ fn update_joint(joint: &mut Joint, oxr_joint: openxr::HandJointLocation) {
 	}
 }
 
+pub struct StardustHandPlugin;
+impl Plugin for StardustHandPlugin {
+	fn build(&self, app: &mut bevy::prelude::App) {
+		app.add_systems(XrSessionCreated, create_hands);
+		app.add_systems(PostUpdate, update_hands);
+	}
+}
+
 fn update_hands(
 	mut mats: ResMut<Assets<DefaultMaterial>>,
 	mut query: Query<&mut SkHand>,
@@ -76,7 +86,7 @@ fn update_hands(
 					update_joint(&mut finger.distal, joints[finger_index + 3]);
 					update_joint(&mut finger.intermediate, joints[finger_index + 2]);
 					update_joint(&mut finger.proximal, joints[finger_index + 1]);
-					update_joint(&mut finger.metacarpal, joints[finger_index + 0]);
+					update_joint(&mut finger.metacarpal, joints[finger_index]);
 					// Why?
 					finger.tip.radius = 0.0;
 				}

src/objects/mod.rs

@@ -20,6 +20,7 @@ use openxr::SpaceLocationFlags;
 use play_space::PlaySpaceBounds;
 use stardust_xr::schemas::dbus::object_registry::ObjectRegistry;
 use std::{marker::PhantomData, sync::Arc};
+use tracing::info;
 use zbus::{interface, object_server::Interface, zvariant::OwnedObjectPath, Connection};
 
 pub mod input;
@@ -54,8 +55,8 @@ pub struct ServerObjects {
 	hmd: (Arc<Spatial>, ObjectHandle<SpatialRef>),
 	play_space: Option<(Arc<Spatial>, ObjectHandle<SpatialRef>)>,
 	inputs: Option<Inputs>,
-	view_space: Option<openxr::Space>,
-	ref_space: Option<openxr::Space>,
+	pub view_space: Option<openxr::Space>,
+	pub ref_space: Option<openxr::Space>,
 }
 
 pub struct TrackingRefs {
@@ -125,7 +126,7 @@ impl ServerObjects {
 		}
 	}
 
-	pub fn update(
+	pub(crate) fn update(
 		&mut self,
 		session: Option<&openxr::Session<openxr::AnyGraphics>>,
 		time: Option<openxr::Time>,