scripting: update lua scripts on 'update' stage

Cargo.toml

@@ -14,6 +14,7 @@ members = [
 
 [features]
 scripting = ["dep:lyra-scripting"]
+lua_scripting = ["scripting", "lyra-scripting/lua"]
 
 [dependencies]
 lyra-game = { path = "lyra-game" }

examples/testbed/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-lyra-engine = { path = "../../", version = "0.0.1", features = ["scripting"] }
+lyra-engine = { path = "../../", version = "0.0.1", features = ["lua_scripting"] }
 #lyra-ecs = { path = "../../lyra-ecs"}
 anyhow = "1.0.75"
 async-std = "1.12.0"

examples/testbed/scripts/test.lua

@@ -0,0 +1,7 @@
+print("Hello World")
+            
+function update()
+    print("updated")
+    --printf("I love to eat formatted {}!", "food")
+    --printf("World is {}", world)
+end

examples/testbed/src/main.rs

@@ -1,6 +1,6 @@
 use std::ptr::NonNull;
 
-use lyra_engine::{math::{self, Vec3}, math::Transform, input::{KeyCode, ActionHandler, Action, ActionKind, LayoutId, ActionMapping, ActionSource, ActionMappingId, InputActionPlugin, MouseInput, MouseAxis, CommonActionLabel}, game::Game, render::{window::{CursorGrabMode, WindowOptions}, light::{PointLight, directional::DirectionalLight, SpotLight}}, change_tracker::Ct, ecs::{system::{Criteria, CriteriaSchedule, BatchedSystem, IntoSystem}, world::World, Component}, DeltaTime, scene::{TransformComponent, ModelComponent, CameraComponent}};
+use lyra_engine::{math::{self, Vec3}, math::Transform, input::{KeyCode, ActionHandler, Action, ActionKind, LayoutId, ActionMapping, ActionSource, ActionMappingId, InputActionPlugin, MouseInput, MouseAxis, CommonActionLabel}, game::Game, render::{window::{CursorGrabMode, WindowOptions}, light::{PointLight, directional::DirectionalLight, SpotLight}}, change_tracker::Ct, ecs::{system::{Criteria, CriteriaSchedule, BatchedSystem, IntoSystem}, world::World, Component}, DeltaTime, scene::{TransformComponent, ModelComponent, CameraComponent}, lua::{LuaScriptingPlugin, LuaScript}, Script, ScriptList};
 use lyra_engine::assets::{ResourceManager, Model};
 
 mod free_fly_camera;
@@ -297,11 +297,26 @@ async fn main() {
         game.with_plugin(InputActionPlugin);
         //game.with_system("input_test", test_system, &[]);
     };
+
+    let script_test_plugin = |game: &mut Game| {
+        game.with_plugin(LuaScriptingPlugin);
+
+        let world = game.world();
+        let mut res_man = world.get_resource_mut::<ResourceManager>();
+        let script = res_man.request::<LuaScript>("scripts/test.lua").unwrap();
+        drop(res_man);
+
+        let script = Script::new("test.lua", script);
+        let scripts = ScriptList::new(vec![script]);
+        world.spawn((scripts,));
+
+    };
     
     Game::initialize().await
         .with_plugin(lyra_engine::DefaultPlugins)
         .with_startup_system(setup_sys.into_system())
         .with_plugin(action_handler_plugin)
+        .with_plugin(script_test_plugin)
         //.with_plugin(fps_plugin)
         .with_plugin(jiggle_plugin)
         .with_plugin(FreeFlyCameraPlugin)

lyra-game/src/game.rs

@@ -313,12 +313,14 @@ impl Game {
         self
     }
 
-    /// Add a plugin to the game. These will be executed before the window is initiated and opened
+    /// Add a plugin to the game. These are executed as they are added.
     pub fn with_plugin<P>(&mut self, plugin: P) -> &mut Self
     where
         P: Plugin + 'static
     {
-        self.plugins.push_back(Box::new(plugin));
+        let plugin = Box::new(plugin);
+        plugin.as_ref().setup(self);
+        self.plugins.push_back(plugin);
 
         self
     }
@@ -339,16 +341,12 @@ impl Game {
         tracing_subscriber::registry()
             .with(fmt::layer().with_writer(stdout_layer))
             .with(filter::Targets::new()
-                .with_target("lyra_engine", Level::TRACE)
-                .with_target("wgpu_core", Level::WARN)
-                .with_default(Level::DEBUG))
+                // done by prefix, so it includes all lyra subpackages
+                .with_target("lyra", Level::TRACE)
+                .with_target("wgpu", Level::WARN)
+                .with_default(Level::INFO))
             .init();
 
-        // setup all the plugins
-        while let Some(plugin) = self.plugins.pop_front() {
-            plugin.as_ref().setup(self);
-        }
-
         let world = self.world.take().unwrap_or_default();
 
         // run startup systems

lyra-game/src/lib.rs

@@ -27,4 +27,7 @@ pub mod scene;
 pub use lyra_resource as assets;
 pub use lyra_ecs as ecs;
 
+#[cfg(feature = "scripting")]
+pub use lyra_scripting as script;
+
 pub use plugin::DefaultPlugins;

lyra-resource/src/loader/mod.rs

@@ -30,7 +30,7 @@ impl From<io::Error> for LoaderError {
 }
 
 pub trait ResourceLoader {
-    /// Returns the extensions that this loader supports.
+    /// Returns the extensions that this loader supports. Does not include the `.`
     fn extensions(&self) -> &[&str];
     /// Returns the mime types that this loader supports.
     fn mime_types(&self) -> &[&str];

lyra-scripting/src/lua/loader.rs

@@ -13,7 +13,7 @@ pub struct LuaLoader;
 
 impl ResourceLoader for LuaLoader {
     fn extensions(&self) -> &[&str] {
-        &[".lua"]
+        &["lua"]
     }
 
     fn mime_types(&self) -> &[&str] {

lyra-scripting/src/lua/mod.rs

@@ -4,6 +4,7 @@ pub use dynamic_iter::*;
 pub mod world;
 use lyra_game::plugin::Plugin;
 use lyra_resource::ResourceManager;
+use tracing::{debug, error};
 pub use world::*;
 
 pub mod script;
@@ -17,7 +18,7 @@ mod test;
 
 use std::{ptr::NonNull, sync::Mutex};
 
-use lyra_ecs::DynamicBundle;
+use lyra_ecs::{DynamicBundle, World};
 use lyra_reflect::{Reflect, RegisteredType, FromType, AsRegisteredType};
 
 use mlua::{Lua, AnyUserDataExt};
@@ -25,7 +26,7 @@ use mlua::{Lua, AnyUserDataExt};
 pub const FN_NAME_INTERNAL_REFLECT_TYPE: &str = "__lyra_internal_reflect_type";
 pub const FN_NAME_INTERNAL_REFLECT: &str = "__lyra_internal_reflect";
 
-use crate::{ScriptBorrow, ScriptDynamicBundle, ScriptApiProviders, ScriptContexts};
+use crate::{ScriptBorrow, ScriptDynamicBundle, ScriptApiProviders, ScriptContexts, ScriptWorldPtr, ScriptList, ScriptData, ScriptHost, ScriptError};
 
 impl<'lua> mlua::FromLua<'lua> for ScriptBorrow {
     fn from_lua(value: mlua::Value<'lua>, _lua: &'lua Lua) -> mlua::Result<Self> {
@@ -114,6 +115,54 @@ impl mlua::UserData for ScriptDynamicBundle {
     }
 }
 
+/// A system that updates the scripts that exist in the world
+pub fn lua_update_scripts(world: &mut World) -> anyhow::Result<()> {
+    let world_ptr = ScriptWorldPtr::from_ref(&world);
+    let mut host = world.get_resource_mut::<LuaHost>();
+    let mut contexts = world.get_resource_mut::<ScriptContexts<Mutex<mlua::Lua>>>();
+    let mut providers = world.get_resource_mut::<ScriptApiProviders<LuaHost>>();
+
+    for scripts in world.view_iter::<&ScriptList<LuaScript>>() {
+        for script in scripts.iter() {
+            let script_data = ScriptData {
+                name: script.name().to_string(),
+                script_id: script.id(),
+            };
+
+            if !contexts.has_context(script.id()) {
+                if let Some(script_res) = &script.res_handle().data {
+                    debug!("Loading script '{}'...", script.name());
+                    let mut script_ctx = host.load_script(&script_res.bytes, &script_data, &mut providers).unwrap();
+                    debug!("Finished loading script '{}'", script.name());
+
+                    debug!("Setting up script '{}'...", script.name());
+                    host.setup_script(&script_data, &mut script_ctx, &mut providers).unwrap();
+                    debug!("Finished setting up script '{}'...", script.name());
+
+                    contexts.add_context(script.id(), script_ctx);
+                } else {
+                    debug!("Script '{}' is not yet loaded, skipping", script.name());
+                }
+            }
+
+            let ctx = contexts.get_context_mut(script.id()).unwrap();
+            
+            debug!("Running 'update' function in script '{}'", script.name());
+            match host.update_script(world_ptr.clone(), &script_data, ctx, &mut providers) {
+                Ok(()) => {},
+                Err(e) => match e {
+                    ScriptError::MluaError(m) => {
+                        error!("Script '{}' ran into an error: {}", script.name(), m);
+                    },
+                    ScriptError::Other(_) => return Err(e.into()),
+                },
+            }
+        }
+    }
+    
+    Ok(())
+}
+
 #[derive(Default)]
 pub struct LuaScriptingPlugin;
 
@@ -125,7 +174,11 @@ impl Plugin for LuaScriptingPlugin {
         world.add_resource_default::<ScriptApiProviders<LuaHost>>();
         world.add_resource_default::<ScriptContexts<Mutex<mlua::Lua>>>();
 
-        let mut loader = world.get_resource_or_else(ResourceManager::default);
+        let mut loader = world.try_get_resource_mut::<ResourceManager>()
+            .expect("Add 'ResourceManager' to the world before trying to add this plugin");
         loader.register_loader::<LuaLoader>();
+        drop(loader);
+
+        game.with_system("lua_update", lua_update_scripts, &[]);
     }
 }

lyra-scripting/src/lua/test.rs

@@ -8,7 +8,7 @@ use tracing_subscriber::{layer::SubscriberExt, fmt, filter, util::SubscriberInit
 
 use crate::{ScriptHost, ScriptData, ScriptApiProvider, ScriptApiProviders, ScriptError, ScriptWorldPtr, ScriptList, Script, ScriptContexts};
 
-use super::{LuaHost, LuaLoader, LuaScript};
+use super::{LuaHost, LuaLoader, LuaScript, lua_update_scripts};
 
 use crate::lyra_engine;
 
@@ -176,44 +176,4 @@ pub fn lua_print() {
     let mut exec = GraphExecutor::new();
     exec.insert_system("lua_update_scripts", lua_update_scripts.into_system(), &[]);
     exec.execute(NonNull::from(&world), true).unwrap();
-}
-
-fn lua_update_scripts(world: &mut World) -> anyhow::Result<()> {
-    let world_ptr = ScriptWorldPtr::from_ref(&world);
-    let mut host = world.get_resource_mut::<LuaHost>();
-    let mut contexts = world.get_resource_mut::<ScriptContexts<Mutex<mlua::Lua>>>();
-    let mut providers = world.get_resource_mut::<ScriptApiProviders<LuaHost>>();
-
-    for scripts in world.view_iter::<&ScriptList<LuaScript>>() {
-        for script in scripts.iter() {
-            let script_data = ScriptData {
-                name: script.name().to_string(),
-                script_id: script.id(),
-            };
-
-            if !contexts.has_context(script.id()) {
-                if let Some(script_res) = &script.res_handle().data {
-                    let mut script_ctx = host.load_script(&script_res.bytes, &script_data, &mut providers).unwrap();
-                    host.setup_script(&script_data, &mut script_ctx, &mut providers).unwrap();
-                    contexts.add_context(script.id(), script_ctx);
-                } else {
-                    debug!("Script '{}' is not yet loaded, skipping", script.name());
-                }
-            }
-
-            let ctx = contexts.get_context_mut(script.id()).unwrap();
-            
-            match host.update_script(world_ptr.clone(), &script_data, ctx, &mut providers) {
-                Ok(()) => {},
-                Err(e) => match e {
-                    ScriptError::MluaError(m) => {
-                        error!("Script '{}' ran into an error: {}", script.name(), m);
-                    },
-                    ScriptError::Other(_) => return Err(e.into()),
-                },
-            }
-        }
-    }
-    
-    Ok(())
 }