I broke everything, but we're less cooked.

Cargo.toml

@@ -4,11 +4,12 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-bevy = { version = "0.16", features = ["file_watcher"] }
+bevy = { version = "0.18.0", features = ["file_watcher"] }
 include_dir = "0.7.4"
-mlua = { version = "0.11.5", features = ["luau","luau-jit","luau-vector4","serde","send"] }
+mlua = { version = "0.11.5", features = ["luau","luau-jit","luau-vector4","serde","send","async"] }
 nameof = "1.3.0"
 thiserror = "2.0.18"
+serde = { version = "1.0.228", features = ["derive"] }
 
 [profile.dev.package."*"]
 opt-level = 3

assets/scripts/script.lua

@@ -1,4 +1,2 @@
 print("wsg")
-for index,item in pairs(_ENV) do
-    print(index,item)
-end
+print("global",_G)

src/duck/instance.rs

@@ -1,59 +1,92 @@
+use std::fmt::Formatter;
 use std::marker::PhantomData;
+use std::ops::{Deref, DerefMut};
+use std::sync::mpsc::{channel, Sender};
+use bevy::ecs::relationship::Relationship;
 use bevy::prelude::*;
+use mlua::AppDataRefMut;
 use mlua::prelude::*;
-
+use mlua::{FromLua,Value};
+use serde::Serialize;
 use crate::duck::part::*;
 use crate::duck::script::*;
 
+#[derive(Debug)]
+struct Error(String);
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+impl core::error::Error for Error {}
+
 #[derive(Component,Resource)]
 pub struct DefaultAsset<S: Asset>(Handle<S>);
 impl<S: Asset> DefaultAsset<S> {
-    pub fn clone(world: &World) -> Handle<S> {
-        world.get_resource::<DefaultAsset<S>>().unwrap().0.clone()
-    }
+    pub fn clone(&self) -> Handle<S> { self.0.clone() }
     pub fn new(commands: &mut Commands, handle: Handle<S>) {
         commands.insert_resource(DefaultAsset(handle));
     }
 }
-
-pub trait Class {
-    fn new(entity: &mut EntityWorldMut) -> AnyInstance;
-    fn load(entity: &mut EntityWorldMut) -> AnyInstance { Self::new(entity) }
-    fn reload(entity: &mut EntityWorldMut) {}
-    fn add_fields<T, F: LuaUserDataFields<T>>(_fields: &mut F) {}
-    fn add_methods<T, F: LuaUserDataMethods<T>>(_methods: &mut F) {}
-    fn class_name() -> &'static str {"Instance"}
+fn world<'w>(lua: &Lua) -> std::result::Result<&'w mut World, mlua::Error> {
+    lua.app_data_mut::<&World>()
+        .ok_or_else(Error("Direct world access not available here!".into()))
+        .map_err(LuaError::external).deref_mut()
 }
 
-pub struct Instance<S: Class>(Entity,PhantomData<S>);
+impl LuaUserData for Transform {
 
-impl<S: Class> LuaUserData for Instance<S> {
+}
+
+pub struct Instance(Entity);
+impl FromLua for Instance {
+    fn from_lua(value: mlua::Value, _: &Lua) -> mlua::Result<Self> {
+        match value {
+            mlua::Value::UserData(ud) => Ok(*ud.borrow::<Self>()?),
+            _ => unreachable!(),
+        }
+    }
+}
+impl LuaUserData for Instance {
     fn add_fields<F: LuaUserDataFields<Self>>(fields: &mut F) {
-        S::add_fields(fields)
+        fields.add_field_method_get("parent",|lua: Lua, this| {
+            Ok(world(&lua)?.get::<ChildOf>(this.0).map(|parent| {Instance(parent.0)}))
+        });
+        fields.add_field_method_set("parent",|lua: Lua, this, other: Option<Instance>| {
+            let world = world(&lua)?;
+            if let Some(other) = other {
+                let mut entity = world.get_entity_mut(other.0).map_err(LuaError::external)?;
+                entity.add_child(this.0);
+            } else {
+                let entity = world.get_entity_mut();
+            }
+            Ok(())
+        });
+        fields.add_field_method_get("transform",|lua: Lua, this| {
+            Ok(world(&lua)?.get::<Transform>(this.0).unwrap())
+        });
+        fields.add_field_method_set("transform",|lua: Lua, this| {
+            Ok()
+        })
+        crate::script::add_fields(fields);
+        crate::part::add_fields(fields);
     }
     fn add_methods<M: LuaUserDataMethods<Self>>(methods: &mut M) {
-        S::add_methods(methods)
+        methods.add_method("despawn",|lua: Lua, this| {
+            let world = world(lua).map_err(LuaError::external)?;
+            world.get_entity(this).map_err(LuaError::external)?;
+            Ok(())
+        });
+        crate::script::add_methods(methods);
+        crate::part::add_fields(methods);
     }
 }
-
-impl<S: Class> Instance<S> {
-    fn new_entity(world: &mut World) -> Entity {
-        let mut entity = world.spawn_empty();
-        entity.entry().or_insert(Name::new("Instance"));
-        let instance = S::new(&mut entity);
-        entity.entry().or_insert(instance);
-        entity.id()
+impl Instance {
+    fn world_access(&self, lua: &Lua) -> std::result::Result<EntityWorldMut, mlua::Error> {
+        world(lua)?.get_entity_mut(self.0).map_err(LuaError::external)
     }
-
-    pub(crate) fn new(entity: &mut EntityWorldMut) -> Instance<S> {
-        Instance(entity.id(),PhantomData)
-    }
-}
-
-#[derive(Component)]
-pub enum AnyInstance {
-    Script(Instance<Script>),
-    Part(Instance<Located<Part>>)
 }
 
 pub fn setup(app: &mut App) {

src/duck/mod.rs

@@ -1,20 +1,8 @@
-use mlua::UserData;
-use mlua::Lua;
-use mlua::UserDataFields;
 use bevy::prelude::*;
-use mlua::UserDataMethods;
-use nameof::name_of_type;
-use std::ops::Deref;
-use std::ops::DerefMut;
-use thiserror::Error;
 
-mod part;
-mod script;
-mod instance;
-
-use include_dir::{include_dir, Dir};
-
-static DATA_DIR: Dir<'_> = include_dir!("data");
+pub mod part;
+pub mod script;
+pub mod instance;
 
 pub struct DuckPlugin;
 

src/duck/part.rs

@@ -1,25 +1,24 @@
+use std::marker::PhantomData;
 use bevy::prelude::*;
+use mlua::{UserDataFields, UserDataMethods};
+use mlua::prelude::{LuaUserDataFields, LuaUserDataMethods};
 use crate::duck::instance::*;
 
-pub struct Located<S: Class>(S);
-impl<S: Class> Class for Located<S> {
-    fn new(entity: &mut EntityWorldMut) -> AnyInstance {
-        entity.insert(Transform::IDENTITY);
-        S::new(entity)
-    }
-}
-
-pub struct Part();
+pub struct Part;
 impl Class for Part {
-    fn new(entity: &mut EntityWorldMut) -> AnyInstance {
-        let world = entity.world();
-        let mesh = DefaultAsset::<Mesh>::clone(world);
-        let material = DefaultAsset::<StandardMaterial>::clone(world);
-        entity.insert((
-            Mesh3d(mesh),
-            MeshMaterial3d(material),
-        ));
-        AnyInstance::Part(Instance::new(entity))
+    fn add_to(entity: &mut EntityCommands) -> Instance {
+        let id = entity.id();
+        entity.commands().run_system_cached_with(move |
+                In(id): In<Entity>,
+                mut commands: Commands,
+                mesh: Res<DefaultAsset<Mesh>>,
+                mat: Res<DefaultAsset<StandardMaterial>>
+            | {
+            if let Ok(mut entity) = commands.get_entity(id) {
+                entity.insert((Mesh3d(mesh.clone()),MeshMaterial3d(mat.clone())));
+            }
+        },id);
+        Instance::Part(Object::<Part>::of(entity.id()))
     }
 }
 
@@ -35,3 +34,15 @@ pub fn startup(
 pub fn setup(app: &mut App) {
     app.add_systems(Startup,startup);
 }
+
+pub(crate) fn add_fields<F: LuaUserDataFields<Instance>>(fields: &mut F) {
+
+}
+
+pub(crate) fn add_methods<M: LuaUserDataMethods<Instance>>(methods: &mut M) {
+
+}
+
+pub fn make(entity: &mut EntityCommands) {
+    entity.insert(Transform::IDENTITY);
+}

src/duck/script.rs

@@ -1,15 +1,15 @@
-use std::ops::Deref;
 use bevy::asset::AsyncReadExt;
 use bevy::prelude::*;
 use bevy::asset::{io::Reader, AssetLoader, LoadContext};
-use bevy::ecs::system::SystemId;
-use mlua::Lua;
+use mlua::prelude::*;
+use mlua::Value;
 use thiserror::Error;
 use crate::duck::instance::*;
 
 #[derive(Asset, TypePath, Debug)]
 pub struct ScriptAsset {
-    source: String
+    pub source: String,
+    pub path: String
 }
 
 #[non_exhaustive]
@@ -35,29 +35,56 @@ impl AssetLoader for ScriptAssetLoader {
         info!("Loading Script...");
         let mut raw = String::new();
         reader.read_to_string(&mut raw).await?;
-        Ok(ScriptAsset { source: raw })
+        Ok(ScriptAsset { source: raw, path: "unknown".into() })
     }
 }
 
 #[derive(Component)]
-pub struct Script(Handle<ScriptAsset>);
+struct ScriptHandle(Handle<ScriptAsset>);
+
+pub struct Script;
 impl Class for Script {
-    fn new(entity: &mut EntityWorldMut) -> AnyInstance {
-        let handle = DefaultAsset::<ScriptAsset>::clone(entity.world());
-        entity.entry().or_insert(Script(handle));
-        let world = entity.world();
+    fn add_to(entity: &mut EntityCommands) -> Instance {
+        let id = entity.id();
+        entity.commands().run_system_cached_with(| // Get commands -> defer a system
+                In(id): In<Entity>,
+                mut commands: Commands, // Commands to add the component
+                script: Res<DefaultAsset<ScriptAsset>> // The default script asset to load it with
+             | {
+            if let Ok(mut entity) = commands.get_entity(id) {
+                entity.insert(ScriptHandle(script.clone()));
+            }
+        },id);
         Self::run(entity);
-        AnyInstance::Script(Instance::new(entity))
+        Instance::Script(Object::<Script>::of(entity.id()))
+    }
+    fn fields<S: Class, F: LuaUserDataFields<Object<S>>>(fields: &mut F) {
+
+    }
+    fn methods<S: Class, F: LuaUserDataMethods<Object<S>>>(methods: &mut F) {
+
     }
 }
-impl Script {
-    fn run(entity: &mut EntityWorldMut) {
-        let lua = &entity.world().get_resource::<DefaultScriptContext>().unwrap().0;
-        let script_assets = entity.get_resource::<Assets<ScriptAsset>>().unwrap();
-        let script_asset_handle = &entity.get::<Script>().unwrap().0;
-        let script = script_assets.get(script_asset_handle).unwrap();
-        lua.load(script.source.clone()).exec().unwrap();
+
+fn run(entity: &mut EntityCommands) {
+    let id= entity.id();
+    entity.commands().run_system_cached_with(| // Get commands -> defer a system:
+        In(id): In<Entity>,
+        query: Query<&ScriptHandle>, // A query to find it again
+        context: Res<DefaultScriptContext>, // A resource for our script context
+        scripts: Res<Assets<ScriptAsset>> // The assets resource for all our scripts
+    | {
+        if let Ok(script) = query.get(id) { // If it's there
+            let asset = scripts.get(script.0.id()).unwrap(); // Get the asset (!)
+            let lua = &context.0;
+            let chunk = lua.load(asset.source.clone()).set_environment(lua.globals());
+            chunk.environment().unwrap().set("script",Instance(id)).unwrap();
+            match chunk.exec() {
+                Ok(()) => {},
+                Err(e) => { println!("Error: {:?}", e); }
+            } // Execute the script (!)
         }
+    },id);
 }
 
 #[derive(Resource)]
@@ -68,9 +95,12 @@ pub fn startup(
     mut script_assets: ResMut<Assets<ScriptAsset>>,
 ) {
     DefaultAsset::new(&mut commands,script_assets.add(ScriptAsset {
-        source: "print(\"Hello world!\")".into()
+        source: "print(\"Hello world!\"); print(script)".into(),
+        path: "default.lua".into(),
     }));
-    commands.insert_resource(DefaultScriptContext(Lua::new()));
+    let lua = Lua::new();
+    lua.sandbox(true).unwrap();
+    commands.insert_resource(DefaultScriptContext(lua));
 }
 
 pub fn setup(app: &mut App) {
@@ -78,3 +108,11 @@ pub fn setup(app: &mut App) {
     app.init_asset_loader::<ScriptAssetLoader>();
     app.add_systems(Startup,startup);
 }
+
+pub(crate) fn add_fields<F: LuaUserDataFields<Instance>>(fields: &mut F) {
+
+}
+
+pub(crate) fn add_methods<M: LuaUserDataMethods<Instance>>(methods: &mut M) {
+
+}

src/main.rs

@@ -1,7 +1,7 @@
 use bevy::prelude::*;
 
 mod duck;
-use duck::DuckPlugin;
+use duck::*;
 
 fn main() {
     App::new()
@@ -41,4 +41,6 @@ fn setup(
         Camera3d::default(),
         Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
     ));
+    commands.new::<Script>();
+    commands.new::<Script>();
 }