port a few more systems to functions and add some name clarity

crates/bevy_pbr/src/lib.rs

@@ -12,6 +12,7 @@ use bevy_app::{stage, AppBuilder, AppPlugin};
 use bevy_asset::AssetStorage;
 use bevy_render::{render_graph::RenderGraph, shader};
 use material::StandardMaterial;
+use legion::prelude::IntoSystem;
 
 #[derive(Default)]
 pub struct PbrPlugin;
@@ -23,7 +24,7 @@ impl AppPlugin for PbrPlugin {
         app.add_resource(AssetStorage::<StandardMaterial>::new())
             .add_system_to_stage(
                 stage::POST_UPDATE,
-                shader::asset_handle_shader_def_system::<StandardMaterial>(),
+                shader::asset_handle_shader_def_system::<StandardMaterial>.system(),
             )
             .add_system_to_stage(
                 stage::POST_UPDATE,

crates/bevy_render/src/render_graph/nodes/camera2d_node.rs

@@ -36,7 +36,7 @@ impl SystemNode for Camera2dNode {
         let mut tmp_buffer = None;
         let mut window_resized_event_reader = resources.get_event_reader::<WindowResized>();
         let mut command_queue = self.command_queue.clone();
-        SystemBuilder::new("camera_resource_provider")
+        SystemBuilder::new("camera_2d_resource_provider")
             .read_resource::<GlobalRenderResourceContext>()
             // TODO: this write on RenderResourceAssignments will prevent this system from running in parallel with other systems that do the same
             .write_resource::<RenderResourceAssignments>()

crates/bevy_render/src/render_graph/nodes/uniform_node.rs

@@ -432,7 +432,7 @@ where
         let mut staging_buffer_resource = None;
         initialize_vertex_buffer_descriptor::<T>(&mut vertex_buffer_descriptors);
         // TODO: maybe run "update" here
-        SystemBuilder::new("uniform_resource_provider")
+        SystemBuilder::new(format!("uniform_resource_provider::<{}>", std::any::type_name::<T>()))
             .read_resource::<AssetStorage<Texture>>()
             .read_resource::<GlobalRenderResourceContext>()
             // TODO: this write on RenderResourceAssignments will prevent this system from running in parallel with other systems that do the same

crates/bevy_render/src/shader/uniform.rs

@@ -20,14 +20,10 @@ pub trait AsUniforms: Send + Sync + 'static {
     fn get_vertex_buffer_descriptor() -> Option<&'static VertexBufferDescriptor>;
 }
 
-pub fn shader_def_system<T>() -> Box<dyn Schedulable>
+pub fn shader_def_system<T>(uniforms: Ref<T>, mut renderable: RefMut<Renderable>)
 where
     T: AsUniforms + Send + Sync + 'static,
 {
-    SystemBuilder::new(format!("shader_def::{}", std::any::type_name::<T>()))
-        .with_query(<(Read<T>, Write<Renderable>)>::query())
-        .build(|_, world, _, query| {
-            for (uniforms, mut renderable) in query.iter_mut(world) {
     if let Some(shader_defs) = uniforms.get_shader_defs() {
         renderable
             .render_resource_assignments
@@ -37,26 +33,19 @@ where
             .extend(shader_defs)
     }
 }
-        })
-}
 
-pub fn asset_handle_shader_def_system<T>() -> Box<dyn Schedulable>
+pub fn asset_handle_shader_def_system<T>(
-where
+    asset_storage: Resource<AssetStorage<T>>,
+    asset_handle: Ref<Handle<T>>,
+    mut renderable: RefMut<Renderable>,
+) where
     T: AsUniforms + Send + Sync + 'static,
 {
-    SystemBuilder::new(format!(
-        "asset_handle_shader_def::{}",
-        std::any::type_name::<T>()
-    ))
-    .read_resource::<AssetStorage<T>>()
-    .with_query(<(Read<Handle<T>>, Write<Renderable>)>::query())
-    .build(|_, world, asset_storage, query| {
-        for (uniform_handle, mut renderable) in query.iter_mut(world) {
     if !renderable.is_visible || renderable.is_instanced {
-                continue;
+        return;
     }
 
-            let uniforms = asset_storage.get(&uniform_handle).unwrap();
+    let uniforms = asset_storage.get(&asset_handle).unwrap();
     if let Some(shader_defs) = uniforms.get_shader_defs() {
         renderable
             .render_resource_assignments
@@ -66,8 +55,6 @@ where
             .extend(shader_defs)
     }
 }
-    })
-}
 
 pub fn asset_handle_batcher_system<T>() -> Box<dyn Schedulable>
 where

examples/shader_defs.rs

@@ -6,7 +6,7 @@ fn main() {
         .add_startup_system(setup)
         .add_system_to_stage(
             stage::POST_UPDATE,
-            shader::asset_handle_shader_def_system::<MyMaterial>(),
+            shader::asset_handle_shader_def_system::<MyMaterial>.system(),
         )
         .run();
 }

examples/systems.rs

@@ -5,7 +5,7 @@ fn main() {
     App::build()
         .add_default_plugins()
         .add_event::<MyEvent>()
-        .add_startup_system(setup)
+        .add_startup_system(setup_system)
         .add_system_init(built_system)
         .add_system(simple_system.system())
         .add_system(closure_system())
@@ -22,7 +22,7 @@ struct X(usize);
 struct Y(usize);
 
 // add our resources and entities
-fn setup(world: &mut World, resources: &mut Resources) {
+fn setup_system(world: &mut World, resources: &mut Resources) {
     resources.insert(A(0));
     world.insert((), vec![(X(0), Y(1)), (X(2), Y(3))]);
 }