Merge branch 'master' into bind-group-reflect-fix

.cargo/config_fast_builds

@@ -10,8 +10,6 @@ rustflags = ["-Clink-arg=-fuse-ld=lld", "-Zshare-generics=y"]
 [target.x86_64-apple-darwin]
 rustflags = ["-Zshare-generics=y"]
 
-# NOTE: you must manually install lld on windows. you can easily do this with the "scoop" package manager:
-# `scoop install llvm`
 [target.x86_64-pc-windows-msvc]
-linker = "lld-link.exe"
-rustflags = ["-Clinker=lld", "-Zshare-generics=y"]
+linker = "rust-lld.exe"
+rustflags = ["-Zshare-generics=y"]

.github/workflows/rust.yml

@@ -17,14 +17,26 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
           override: true
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          components: rustfmt
+
       - name: Install alsa
         run: sudo apt-get install libasound2-dev
+
       - name: Build
         run: cargo check
+
+      - name: Check the format
+        run: cargo +nightly fmt --all -- --check
+
       - name: Run tests
         run: cargo test --workspace
 

Cargo.toml

@@ -15,6 +15,7 @@ exclude = ["assets/**/*", "tools/**/*", ".github/**/*", "crates/**/*"]
 [features]
 default = ["bevy_audio", "bevy_gltf", "bevy_wgpu", "bevy_winit", "png", "hdr", "mp3"]
 profiler = ["bevy_ecs/profiler", "bevy_diagnostic/profiler"]
+wgpu_trace = ["bevy_wgpu/trace"]
 
 # Image format support for texture loading (PNG and HDR are enabled by default)
 png = ["bevy_render/png"]
@@ -122,6 +123,10 @@ path = "examples/app/headless.rs"
 name = "plugin"
 path = "examples/app/plugin.rs"
 
+[[example]]
+name = "thread_pool_resources"
+path = "examples/app/thread_pool_resources.rs"
+
 [[example]]
 name = "hot_asset_reloading"
 path = "examples/asset/hot_asset_reloading.rs"

crates/bevy_asset/src/lib.rs

@@ -1,7 +1,7 @@
-#[cfg(feature = "filesystem_watcher")]
-mod filesystem_watcher;
 mod asset_server;
 mod assets;
+#[cfg(feature = "filesystem_watcher")]
+mod filesystem_watcher;
 mod handle;
 mod load_request;
 mod loader;

crates/bevy_diagnostic/Cargo.toml

@@ -10,7 +10,7 @@ license = "MIT"
 keywords = ["bevy"]
 
 [features]
-profiler = []
+profiler = ["bevy_ecs/profiler"]
 
 [dependencies]
 # bevy

crates/bevy_diagnostic/src/lib.rs

@@ -19,7 +19,7 @@ impl Plugin for DiagnosticsPlugin {
         #[cfg(feature = "profiler")]
         {
             use bevy_ecs::IntoQuerySystem;
-            app.add_resource::<Box<dyn bevy_ecs::profiler::Profiler>>(Box::new(
+            app.add_resource::<Box<dyn bevy_ecs::Profiler>>(Box::new(
                 system_profiler::SystemProfiler::default(),
             ))
             .add_system_to_stage(

crates/bevy_diagnostic/src/system_profiler.rs

@@ -1,5 +1,5 @@
 use crate::{Diagnostic, DiagnosticId, Diagnostics};
-use bevy_ecs::{profiler::Profiler, Res, ResMut};
+use bevy_ecs::{Profiler, Res, ResMut};
 use std::{
     borrow::Cow,
     collections::HashMap,

crates/bevy_ecs/Cargo.toml

@@ -19,3 +19,4 @@ rand = "0.7.2"
 rayon = "1.3"
 crossbeam-channel = "0.4.2"
 fixedbitset = "0.3.0"
+downcast-rs = "1.1.1"

crates/bevy_ecs/hecs/examples/format.rs

@@ -4,7 +4,9 @@
 //! also be useful for serialization, or other row-oriented generic operations.
 
 fn format_entity(entity: bevy_hecs::EntityRef<'_>) -> String {
-    fn fmt<T: bevy_hecs::Component + std::fmt::Display>(entity: bevy_hecs::EntityRef<'_>) -> Option<String> {
+    fn fmt<T: bevy_hecs::Component + std::fmt::Display>(
+        entity: bevy_hecs::EntityRef<'_>,
+    ) -> Option<String> {
         Some(entity.get::<T>()?.to_string())
     }
 

crates/bevy_ecs/hecs/src/query.rs

@@ -182,6 +182,12 @@ impl<'a, T: Component> DerefMut for Mut<'a, T> {
     }
 }
 
+impl<'a, T: Component + core::fmt::Debug> core::fmt::Debug for Mut<'a, T> {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        self.value.fmt(f)
+    }
+}
+
 impl<'a, T: Component> Query for Mut<'a, T> {
     type Fetch = FetchMut<T>;
 }

crates/bevy_ecs/src/resource/resource_query.rs

@@ -3,12 +3,12 @@ use crate::{
     system::{SystemId, TypeAccess},
     Resource, ResourceIndex,
 };
+use bevy_hecs::smaller_tuples_too;
 use core::{
     any::TypeId,
     ops::{Deref, DerefMut},
     ptr::NonNull,
 };
-use bevy_hecs::smaller_tuples_too;
 use std::marker::PhantomData;
 
 /// Shared borrow of a Resource

crates/bevy_ecs/src/resource/resources.rs

@@ -1,7 +1,7 @@
 use super::{FetchResource, ResourceQuery};
 use crate::system::SystemId;
-use core::any::TypeId;
 use bevy_hecs::{Archetype, Ref, RefMut, TypeInfo};
+use core::any::TypeId;
 use std::{collections::HashMap, ptr::NonNull};
 
 /// A Resource type

crates/bevy_ecs/src/schedule/parallel_executor.rs

@@ -3,9 +3,9 @@ use crate::{
     resource::Resources,
     system::{ArchetypeAccess, System, ThreadLocalExecution, TypeAccess},
 };
+use bevy_hecs::{ArchetypesGeneration, World};
 use crossbeam_channel::{Receiver, Sender};
 use fixedbitset::FixedBitSet;
-use bevy_hecs::{ArchetypesGeneration, World};
 use rayon::ScopeFifo;
 use std::{
     ops::Range,
@@ -68,6 +68,52 @@ impl ParallelExecutor {
     }
 }
 
+/// This can be added as an app resource to control the global `rayon::ThreadPool` used by ecs.
+// Dev internal note: We cannot directly expose a ThreadPoolBuilder here as it does not implement Send and Sync.
+#[derive(Debug, Default, Clone)]
+pub struct ParallelExecutorOptions {
+    /// If some value, we'll set up the thread pool to use at most n threads. See `rayon::ThreadPoolBuilder::num_threads`.
+    num_threads: Option<usize>,
+    /// If some value, we'll set up the thread pool's' workers to the given stack size. See `rayon::ThreadPoolBuilder::stack_size`.
+    stack_size: Option<usize>,
+    // TODO: Do we also need/want to expose other features (*_handler, etc.)
+}
+
+impl ParallelExecutorOptions {
+    /// Creates a new ParallelExecutorOptions instance
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Sets the num_threads option, using the builder pattern
+    pub fn with_num_threads(mut self, num_threads: Option<usize>) -> Self {
+        self.num_threads = num_threads;
+        self
+    }
+
+    /// Sets the stack_size option, using the builder pattern. WARNING: Only use this if you know what you're doing,
+    /// otherwise your application may run into stability and performance issues.
+    pub fn with_stack_size(mut self, stack_size: Option<usize>) -> Self {
+        self.stack_size = stack_size;
+        self
+    }
+
+    /// Creates a new ThreadPoolBuilder based on the current options.
+    pub(crate) fn create_builder(&self) -> rayon::ThreadPoolBuilder {
+        let mut builder = rayon::ThreadPoolBuilder::new();
+
+        if let Some(num_threads) = self.num_threads {
+            builder = builder.num_threads(num_threads);
+        }
+
+        if let Some(stack_size) = self.stack_size {
+            builder = builder.stack_size(stack_size);
+        }
+
+        builder
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct ExecutorStage {
     /// each system's set of dependencies
@@ -313,10 +359,8 @@ impl ExecutorStage {
         self.running_systems.clear();
 
         let mut run_ready_result = RunReadyResult::Ok;
-        let run_ready_system_index_range = if let Some(index) = self
-            .thread_local_system_indices
-            .get(0)
-        {
+        let run_ready_system_index_range =
+            if let Some(index) = self.thread_local_system_indices.get(0) {
                 // if there is an upcoming thread local system, run up to (and including) it
                 0..(*index + 1)
             } else {
@@ -324,8 +368,13 @@ impl ExecutorStage {
                 0..systems.len()
             };
         rayon::scope_fifo(|scope| {
-            run_ready_result =
-                self.run_ready_systems(systems, RunReadyType::Range(run_ready_system_index_range), scope, world, resources);
+            run_ready_result = self.run_ready_systems(
+                systems,
+                RunReadyType::Range(run_ready_system_index_range),
+                scope,
+                world,
+                resources,
+            );
         });
         loop {
             // if all systems in the stage are finished, break out of the loop
@@ -395,8 +444,8 @@ mod tests {
         system::{IntoQuerySystem, IntoThreadLocalSystem, Query},
         Commands,
     };
-    use fixedbitset::FixedBitSet;
     use bevy_hecs::{Entity, World};
+    use fixedbitset::FixedBitSet;
     use std::sync::{Arc, Mutex};
 
     #[derive(Default)]

crates/bevy_ecs/src/schedule/schedule.rs

@@ -1,5 +1,6 @@
 use crate::{
     resource::Resources,
+    schedule::ParallelExecutorOptions,
     system::{System, SystemId, ThreadLocalExecution},
 };
 use bevy_hecs::World;
@@ -130,9 +131,9 @@ impl Schedule {
         for stage_name in self.stage_order.iter() {
             if let Some(stage_systems) = self.stages.get_mut(stage_name) {
                 for system in stage_systems.iter_mut() {
-                    #[cfg(feature = "profiler")]
-                    crate::profiler::profiler_start(resources, system.name().clone());
                     let mut system = system.lock().unwrap();
+                    #[cfg(feature = "profiler")]
+                    crate::profiler_start(resources, system.name().clone());
                     system.update_archetype_access(world);
                     match system.thread_local_execution() {
                         ThreadLocalExecution::NextFlush => system.run(world, resources),
@@ -143,7 +144,7 @@ impl Schedule {
                         }
                     }
                     #[cfg(feature = "profiler")]
-                    crate::profiler::profiler_stop(resources, system.name().clone());
+                    crate::profiler_stop(resources, system.name().clone());
                 }
 
                 // "flush"
@@ -169,6 +170,15 @@ impl Schedule {
             return;
         }
 
+        let thread_pool_builder = resources
+            .get::<ParallelExecutorOptions>()
+            .map(|options| (*options).clone())
+            .unwrap_or_else(|| ParallelExecutorOptions::default())
+            .create_builder();
+        // For now, bevy_ecs only uses the global thread pool so it is sufficient to configure it once here.
+        // Dont call .unwrap() as the function is called twice..
+        let _ = thread_pool_builder.build_global();
+
         for stage in self.stages.values_mut() {
             for system in stage.iter_mut() {
                 let mut system = system.lock().unwrap();

crates/bevy_ecs/src/system/commands.rs

@@ -1,7 +1,10 @@
 use super::SystemId;
 use crate::resource::{Resource, Resources};
 use bevy_hecs::{Bundle, Component, DynamicBundle, Entity, World};
-use std::sync::{Arc, Mutex};
+use std::{
+    marker::PhantomData,
+    sync::{Arc, Mutex},
+};
 
 /// A queued command to mutate the current [World] or [Resources]
 pub enum Command {
@@ -109,6 +112,25 @@ where
     }
 }
 
+pub(crate) struct RemoveOne<T>
+where
+    T: Component,
+{
+    entity: Entity,
+    phantom: PhantomData<T>,
+}
+
+impl<T> WorldWriter for RemoveOne<T>
+where
+    T: Component,
+{
+    fn write(self: Box<Self>, world: &mut World) {
+        if world.get::<T>(self.entity).is_ok() {
+            world.remove_one::<T>(self.entity).unwrap();
+        }
+    }
+}
+
 pub trait ResourcesWriter: Send + Sync {
     fn write(self: Box<Self>, resources: &mut Resources);
 }
@@ -321,6 +343,16 @@ impl Commands {
         }
         self
     }
+
+    pub fn remove_one<T>(&mut self, entity: Entity) -> &mut Self
+    where
+        T: Component,
+    {
+        self.write_world(RemoveOne::<T> {
+            entity,
+            phantom: PhantomData,
+        })
+    }
 }
 
 #[cfg(test)]

crates/bevy_ecs/src/system/mod.rs

@@ -2,12 +2,12 @@ mod commands;
 mod into_system;
 #[cfg(feature = "profiler")]
 mod profiler;
-mod system;
 mod query;
+mod system;
 
 pub use commands::*;
 pub use into_system::*;
 #[cfg(feature = "profiler")]
 pub use profiler::*;
-pub use system::*;
 pub use query::*;
+pub use system::*;

crates/bevy_ecs/src/system/profiler.rs

@@ -11,13 +11,13 @@ pub trait Profiler: Downcast + Send + Sync + 'static {
 }
 
 pub fn profiler_start(resources: &Resources, scope: Cow<'static, str>) {
-    if let Ok(profiler) = resources.get::<Box<dyn Profiler>>() {
+    if let Some(profiler) = resources.get::<Box<dyn Profiler>>() {
         profiler.start(scope);
     }
 }
 
 pub fn profiler_stop(resources: &Resources, scope: Cow<'static, str>) {
-    if let Ok(profiler) = resources.get::<Box<dyn Profiler>>() {
+    if let Some(profiler) = resources.get::<Box<dyn Profiler>>() {
         profiler.stop(scope);
     }
 }

crates/bevy_ecs/src/system/system.rs

@@ -1,6 +1,6 @@
 use crate::resource::Resources;
-use fixedbitset::FixedBitSet;
 use bevy_hecs::{Access, Query, World};
+use fixedbitset::FixedBitSet;
 use std::{any::TypeId, borrow::Cow, collections::HashSet};
 
 /// Determines the strategy used to run the `run_thread_local` function in a [System]

crates/bevy_input/src/keyboard.rs

@@ -1,6 +1,6 @@
 use crate::Input;
 use bevy_app::prelude::*;
-use bevy_ecs::{Res, ResMut, Local};
+use bevy_ecs::{Local, Res, ResMut};
 
 /// A key input event from a keyboard device
 #[derive(Debug, Clone)]

crates/bevy_input/src/lib.rs

@@ -11,9 +11,7 @@ pub mod prelude {
 
 use bevy_app::prelude::*;
 use keyboard::{keyboard_input_system, KeyCode, KeyboardInput};
-use mouse::{
-    mouse_button_input_system, MouseButton, MouseButtonInput, MouseMotion,
-};
+use mouse::{mouse_button_input_system, MouseButton, MouseButtonInput, MouseMotion};
 
 use bevy_ecs::IntoQuerySystem;
 

crates/bevy_input/src/mouse.rs

@@ -1,7 +1,7 @@
 use super::keyboard::ElementState;
 use crate::Input;
 use bevy_app::prelude::{EventReader, Events};
-use bevy_ecs::{Res, ResMut, Local};
+use bevy_ecs::{Local, Res, ResMut};
 use bevy_math::Vec2;
 
 /// A mouse button input event

crates/bevy_pbr/src/render_graph/mod.rs

@@ -16,6 +16,7 @@ pub mod uniform {
     pub const LIGHTS: &str = "Lights";
 }
 
+use crate::prelude::StandardMaterial;
 use bevy_asset::Assets;
 use bevy_ecs::Resources;
 use bevy_render::{
@@ -24,7 +25,6 @@ use bevy_render::{
     shader::Shader,
 };
 use bevy_transform::prelude::Transform;
-use crate::prelude::StandardMaterial;
 
 pub(crate) fn add_pbr_graph(graph: &mut RenderGraph, resources: &Resources) {
     graph.add_system_node(node::TRANSFORM, RenderResourcesNode::<Transform>::new(true));
@@ -41,10 +41,13 @@ pub(crate) fn add_pbr_graph(graph: &mut RenderGraph, resources: &Resources) {
     );
 
     // TODO: replace these with "autowire" groups
-    graph.add_node_edge(node::STANDARD_MATERIAL, base::node::MAIN_PASS)
+    graph
+        .add_node_edge(node::STANDARD_MATERIAL, base::node::MAIN_PASS)
         .unwrap();
-    graph.add_node_edge(node::TRANSFORM, base::node::MAIN_PASS)
+    graph
+        .add_node_edge(node::TRANSFORM, base::node::MAIN_PASS)
         .unwrap();
-    graph.add_node_edge(node::LIGHTS, base::node::MAIN_PASS)
+    graph
+        .add_node_edge(node::LIGHTS, base::node::MAIN_PASS)
         .unwrap();
 }

crates/bevy_render/Cargo.toml

@@ -38,6 +38,7 @@ once_cell = "1.4.0"
 downcast-rs = "1.1.1"
 thiserror = "1.0"
 anyhow = "1.0"
+hexasphere = "0.1.5"
 
 [features]
 png = ["image/png"]

crates/bevy_render/src/camera/projection.rs

@@ -1,7 +1,7 @@
+use super::DepthCalculation;
 use bevy_math::Mat4;
 use bevy_property::{Properties, Property};
 use serde::{Deserialize, Serialize};
-use super::DepthCalculation;
 
 pub trait CameraProjection {
     fn get_projection_matrix(&self) -> Mat4;

crates/bevy_render/src/camera/visible_entities.rs

@@ -2,8 +2,8 @@ use super::{Camera, DepthCalculation};
 use crate::Draw;
 use bevy_core::FloatOrd;
 use bevy_ecs::{Entity, Query};
-use bevy_transform::prelude::Transform;
 use bevy_property::Properties;
+use bevy_transform::prelude::Transform;
 
 #[derive(Debug)]
 pub struct VisibleEntity {

crates/bevy_render/src/mesh/mesh.rs

@@ -165,12 +165,16 @@ impl Mesh {
     }
 }
 
+/// Generation for some primitive shape meshes.
 pub mod shape {
     use super::{Mesh, VertexAttribute};
     use crate::pipeline::PrimitiveTopology;
     use bevy_math::*;
+    use hexasphere::Hexasphere;
 
+    /// A cube.
     pub struct Cube {
+        /// Half the side length of the cube.
         pub size: f32,
     }
 
@@ -246,8 +250,11 @@ pub mod shape {
         }
     }
 
+    /// A rectangle on the XY plane.
     pub struct Quad {
+        /// Full width and height of the rectangle.
         pub size: Vec2,
+        /// Flips the texture coords of the resulting vertices.
         pub flip: bool,
     }
 
@@ -341,7 +348,9 @@ pub mod shape {
         }
     }
 
+    /// A square on the XZ plane.
     pub struct Plane {
+        /// The total side length of the square.
         pub size: f32,
     }
 
@@ -378,6 +387,68 @@ pub mod shape {
             }
         }
     }
+
+    /// A sphere made from a subdivided Icosahedron.
+    pub struct Icosphere {
+        /// The radius of the sphere.
+        pub radius: f32,
+        /// The number of subdivisions applied.
+        pub subdivisions: usize,
+    }
+
+    impl Default for Icosphere {
+        fn default() -> Self {
+            Self {
+                radius: 1.0,
+                subdivisions: 5,
+            }
+        }
+    }
+
+    impl From<Icosphere> for Mesh {
+        fn from(sphere: Icosphere) -> Self {
+            let hexasphere = Hexasphere::new(sphere.subdivisions, |point| {
+                let inclination = point.z().acos();
+                let azumith = point.y().atan2(point.x());
+
+                let norm_inclination = 1.0 - (inclination / std::f32::consts::PI);
+                let norm_azumith = (azumith / std::f32::consts::PI) * 0.5;
+
+                [norm_inclination, norm_azumith]
+            });
+
+            let raw_points = hexasphere.raw_points();
+
+            let points = raw_points
+                .iter()
+                .map(|&p| (p * sphere.radius).into())
+                .collect::<Vec<[f32; 3]>>();
+
+            let normals = raw_points
+                .iter()
+                .copied()
+                .map(Into::into)
+                .collect::<Vec<[f32; 3]>>();
+
+            let uvs = hexasphere.raw_data().to_owned();
+
+            let mut indices = Vec::with_capacity(hexasphere.indices_per_main_triangle() * 20);
+
+            for i in 0..20 {
+                hexasphere.get_indices(i, &mut indices);
+            }
+
+            Mesh {
+                primitive_topology: PrimitiveTopology::TriangleList,
+                attributes: vec![
+                    VertexAttribute::position(points),
+                    VertexAttribute::normal(normals),
+                    VertexAttribute::uv(uvs),
+                ],
+                indices: Some(indices),
+            }
+        }
+    }
 }
 
 fn remove_current_mesh_resources(

crates/bevy_render/src/pipeline/pipeline_compiler.rs

@@ -4,10 +4,10 @@ use crate::{
     shader::{Shader, ShaderSource},
 };
 use bevy_asset::{Assets, Handle};
-use once_cell::sync::Lazy;
-use std::collections::{HashMap, HashSet};
 use bevy_property::{Properties, Property};
-use serde::{Serialize, Deserialize};
+use once_cell::sync::Lazy;
+use serde::{Deserialize, Serialize};
+use std::collections::{HashMap, HashSet};
 #[derive(Clone, Eq, PartialEq, Debug, Properties)]
 pub struct PipelineSpecialization {
     pub shader_specialization: ShaderSpecialization,

crates/bevy_render/src/pipeline/render_pipelines.rs

@@ -77,6 +77,9 @@ pub fn draw_render_pipelines_system(
     mut query: Query<(&mut Draw, &mut RenderPipelines)>,
 ) {
     for (mut draw, mut render_pipelines) in &mut query.iter() {
+        if !draw.is_visible {
+            continue;
+        }
         let render_pipelines = &mut *render_pipelines;
         for pipeline in render_pipelines.pipelines.iter_mut() {
             pipeline.specialization.sample_count = msaa.samples;

crates/bevy_render/src/pipeline/state_descriptors.rs

@@ -1,6 +1,6 @@
 use crate::texture::TextureFormat;
-use serde::{Serialize, Deserialize};
 use bevy_property::Property;
+use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug)]
 pub struct DepthStencilStateDescriptor {

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

@@ -3,8 +3,8 @@ use crate::{
     draw::{Draw, RenderCommand},
     pass::{ClearColor, LoadOp, PassDescriptor, TextureAttachment},
     pipeline::{
-        BindGroupDescriptor, BindType, BindingDescriptor, PipelineDescriptor, UniformProperty,
-        BindingShaderStage,
+        BindGroupDescriptor, BindType, BindingDescriptor, BindingShaderStage, PipelineDescriptor,
+        UniformProperty,
     },
     render_graph::{Node, ResourceSlotInfo, ResourceSlots},
     renderer::{
@@ -12,7 +12,7 @@ use crate::{
     },
 };
 use bevy_asset::{Assets, Handle};
-use bevy_ecs::{Resources, World, HecsQuery};
+use bevy_ecs::{HecsQuery, Resources, World};
 use std::marker::PhantomData;
 
 struct CameraInfo {
@@ -136,8 +136,9 @@ impl<Q: HecsQuery + Send + Sync + 'static> Node for PassNode<Q> {
                     TextureAttachment::Id(input.get(input_index).unwrap().get_texture().unwrap());
             }
             if let Some(input_index) = self.color_resolve_target_indices[i] {
-                color_attachment.resolve_target =
-                    Some(TextureAttachment::Id(input.get(input_index).unwrap().get_texture().unwrap()));
+                color_attachment.resolve_target = Some(TextureAttachment::Id(
+                    input.get(input_index).unwrap().get_texture().unwrap(),
+                ));
             }
         }
 

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

@@ -658,7 +658,10 @@ fn asset_render_resources_node_system<T: RenderResources>(
         }
     }
 
-    for (asset_handle, _draw, mut render_pipelines) in &mut query.iter() {
+    for (asset_handle, draw, mut render_pipelines) in &mut query.iter() {
+        if !draw.is_visible {
+            continue;
+        }
         if let Some(asset_bindings) = asset_render_resource_bindings.get(*asset_handle) {
             render_pipelines.bindings.extend(asset_bindings);
         }

crates/bevy_render/src/renderer/render_resource/render_resource_bindings.rs

@@ -261,7 +261,7 @@ impl Default for RenderResourceBindingsId {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::pipeline::{BindType, BindingDescriptor, UniformProperty, BindingShaderStage};
+    use crate::pipeline::{BindType, BindingDescriptor, BindingShaderStage, UniformProperty};
 
     #[test]
     fn test_bind_groups() {

crates/bevy_render/src/shader/shader_reflect.rs

@@ -1,7 +1,7 @@
 use crate::{
     pipeline::{
-        BindGroupDescriptor, BindType, BindingDescriptor, InputStepMode, UniformProperty,
-        VertexAttributeDescriptor, VertexBufferDescriptor, VertexFormat, BindingShaderStage,
+        BindGroupDescriptor, BindType, BindingDescriptor, BindingShaderStage, InputStepMode,
+        UniformProperty, VertexAttributeDescriptor, VertexBufferDescriptor, VertexFormat,
     },
     texture::{TextureComponentType, TextureViewDimension},
 };

crates/bevy_ron/src/ser/mod.rs

@@ -1,8 +1,10 @@
 use serde::{ser, Deserialize, Serialize};
 use std::io;
 
-use crate::error::{Error, Result};
-use crate::extensions::Extensions;
+use crate::{
+    error::{Error, Result},
+    extensions::Extensions,
+};
 
 mod value;
 

crates/bevy_scene/src/scene.rs

@@ -44,7 +44,10 @@ impl Scene {
     }
 
     // TODO: move to AssetSaver when it is implemented
-    pub fn serialize_ron(&self, registry: &PropertyTypeRegistry) -> Result<String, bevy_ron::Error> {
+    pub fn serialize_ron(
+        &self,
+        registry: &PropertyTypeRegistry,
+    ) -> Result<String, bevy_ron::Error> {
         serialize_ron(SceneSerializer::new(self, registry))
     }
 }

crates/bevy_scene/src/scene_spawner.rs

@@ -113,7 +113,6 @@ impl SceneSpawner {
                         component_registration.apply_component_to_entity(world, entity, component);
                     }
                 }
-
             } else {
                 world.spawn_as_entity(entity, (1,));
                 for component in scene_entity.components.iter() {
@@ -122,7 +121,8 @@ impl SceneSpawner {
                         .ok_or_else(|| SceneSpawnError::UnregisteredComponent {
                             type_name: component.type_name.to_string(),
                         })?;
-                    component_registration.add_component_to_entity(world, resources, entity, component);
+                    component_registration
+                        .add_component_to_entity(world, resources, entity, component);
                 }
             }
         }
@@ -209,7 +209,6 @@ pub fn scene_spawner_system(world: &mut World, resources: &mut Resources) {
         }
     }
 
-
     scene_spawner.load_queued_scenes(world, resources).unwrap();
     scene_spawner.spawn_queued_scenes(world, resources).unwrap();
     scene_spawner

crates/bevy_text/src/draw.rs

@@ -7,10 +7,11 @@ use bevy_render::{
     draw::{Draw, DrawContext, DrawError, Drawable},
     mesh,
     pipeline::PipelineSpecialization,
+    prelude::Msaa,
     renderer::{
         AssetRenderResourceBindings, BindGroup, BufferUsage, RenderResourceBindings,
         RenderResourceId,
-    }, prelude::Msaa,
+    },
 };
 use bevy_sprite::{TextureAtlas, TextureAtlasSprite};
 

crates/bevy_ui/src/widget/text.rs

@@ -4,8 +4,9 @@ use bevy_ecs::{Changed, Query, Res, ResMut};
 use bevy_math::{Size, Vec3};
 use bevy_render::{
     draw::{Draw, DrawContext, Drawable},
+    prelude::Msaa,
     renderer::{AssetRenderResourceBindings, RenderResourceBindings},
-    texture::Texture, prelude::Msaa,
+    texture::Texture,
 };
 use bevy_sprite::TextureAtlas;
 use bevy_text::{DrawableText, Font, FontAtlasSet, TextStyle};
@@ -59,7 +60,8 @@ pub fn draw_text_system(
     mut query: Query<(&mut Draw, &Text, &Node, &Transform)>,
 ) {
     for (mut draw, text, node, transform) in &mut query.iter() {
-        let position = Vec3::from(transform.value.w_axis().truncate()) - (node.size / 2.0).extend(0.0);
+        let position =
+            Vec3::from(transform.value.w_axis().truncate()) - (node.size / 2.0).extend(0.0);
 
         let mut drawable_text = DrawableText {
             font: fonts.get(&text.font).unwrap(),

crates/bevy_wgpu/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["bevy"]
 
 [features]
 default = ["bevy_winit"]
+trace = ["wgpu/trace"]
 
 [dependencies]
 # bevy

crates/bevy_wgpu/src/renderer/wgpu_render_resource_context.rs

@@ -5,7 +5,9 @@ use crate::{
 
 use bevy_asset::{Assets, Handle, HandleUntyped};
 use bevy_render::{
-    pipeline::{BindGroupDescriptor, BindGroupDescriptorId, BindingShaderStage, PipelineDescriptor},
+    pipeline::{
+        BindGroupDescriptor, BindGroupDescriptorId, BindingShaderStage, PipelineDescriptor,
+    },
     renderer::{
         BindGroup, BufferId, BufferInfo, RenderResourceBinding, RenderResourceContext,
         RenderResourceId, SamplerId, TextureId,
@@ -113,7 +115,9 @@ impl WgpuRenderResourceContext {
             .bindings
             .iter()
             .map(|binding| {
-                let shader_stage = if binding.shader_stage == BindingShaderStage::VERTEX | BindingShaderStage::FRAGMENT {
+                let shader_stage = if binding.shader_stage
+                    == BindingShaderStage::VERTEX | BindingShaderStage::FRAGMENT
+                {
                     wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT
                 } else if binding.shader_stage == BindingShaderStage::VERTEX {
                     wgpu::ShaderStage::VERTEX

crates/bevy_wgpu/src/wgpu_renderer.rs

@@ -27,6 +27,11 @@ impl WgpuRenderer {
             .await
             .expect("Unable to find a GPU! Make sure you have installed required drivers!");
 
+        #[cfg(feature = "trace")]
+        let trace_path = Some(std::path::Path::new("wgpu_trace"));
+        #[cfg(not(feature = "trace"))]
+        let trace_path = None;
+
         let (device, queue) = adapter
             .request_device(
                 &wgpu::DeviceDescriptor {
@@ -34,7 +39,7 @@ impl WgpuRenderer {
                     limits: wgpu::Limits::default(),
                     shader_validation: true,
                 },
-                None,
+                trace_path,
             )
             .await
             .unwrap();

docs/debugging.md

@@ -2,7 +2,16 @@
 
 ## Macro Debugging
 
-- Print the final output of a macro using `cargo rustc --profile=check -- -Zunstable-options --pretty=expanded`
-  - Alternatively you could install and use [cargo expand](https://github.com/dtolnay/cargo-expand) which adds syntax highlighting to the terminal output.
-    - Additionally get pager by piping to `less` ( on Unix systems ): `cargo expand --color always | less -R`
-- Print output during macro compilation using `eprintln!("hi");`
+* Print the final output of a macro using `cargo rustc --profile=check -- -Zunstable-options --pretty=expanded`
+  * Alternatively you could install and use [cargo expand](https://github.com/dtolnay/cargo-expand) which adds syntax highlighting to the terminal output.
+    * Additionally get pager by piping to `less` ( on Unix systems ): `cargo expand --color always | less -R`
+* Print output during macro compilation using `eprintln!("hi");`
+
+## WGPU Tracing
+
+When a suspected wgpu error occurs, you should capture a wgpu trace so that Bevy and wgpu devs can debug using the [wgpu player tool](https://github.com/gfx-rs/wgpu/wiki/Debugging-wgpu-Applications#tracing-infrastructure).
+
+To capture a wgpu trace:
+1. Create a new `wgpu_trace` folder in the root of your cargo workspace
+2. Add the "wgpu_trace" feature to the bevy crate. (ex: `cargo run --example features wgpu_trace`)
+3. Zip up the wgpu_trace folder and attach it to the relevant issue. New wgpu issues should generally be created here https://github.com/gfx-rs/wgpu. Please include the wgpu revision in your bug reports. You can find the revision in the Cargo.lock file in your workspace.

docs/linux_dependencies.md

@@ -6,3 +6,6 @@ If you don't see your distro present in the list, feel free to add the instructi
 
 ## Ubuntu 20.04
 `sudo apt-get install libx11-dev libasound2-dev`
+
+## Fedora 32
+`sudo dnf install gcc-c++ libX11-devel alsa-lib-devel`

examples/3d/3d_scene.rs

@@ -29,6 +29,16 @@ fn setup(
             translation: Translation::new(0.0, 1.0, 0.0),
             ..Default::default()
         })
+        // sphere
+        .spawn(PbrComponents {
+            mesh: meshes.add(Mesh::from(shape::Icosphere {
+                subdivisions: 4,
+                radius: 0.5,
+            })),
+            material: materials.add(Color::rgb(0.1, 0.4, 0.8).into()),
+            translation: Translation::new(1.5, 1.5, 1.5),
+            ..Default::default()
+        })
         // light
         .spawn(LightComponents {
             translation: Translation::new(4.0, 8.0, 4.0),

examples/3d/load_model.rs

@@ -18,7 +18,9 @@ fn setup(
         // mesh
         .spawn(PbrComponents {
             // load the mesh
-            mesh: asset_server.load("assets/models/monkey/Monkey.gltf").unwrap(),
+            mesh: asset_server
+                .load("assets/models/monkey/Monkey.gltf")
+                .unwrap(),
             // create a material for the mesh
             material: materials.add(Color::rgb(0.5, 0.4, 0.3).into()),
             ..Default::default()

examples/app/thread_pool_resources.rs

@@ -0,0 +1,10 @@
+use bevy::{ecs::ParallelExecutorOptions, prelude::*};
+
+/// This example illustrates how to customize the thread pool used internally (e.g. to only use a
+/// certain number of threads).
+fn main() {
+    App::build()
+        .add_resource(ParallelExecutorOptions::new().with_num_threads(Some(4)))
+        .add_default_plugins()
+        .run();
+}

examples/scene/scene.rs

@@ -13,6 +13,7 @@ fn main() {
         .register_component::<ComponentB>()
         .add_startup_system(save_scene_system.thread_local_system())
         .add_startup_system(load_scene_system.system())
+        .add_startup_system(infotext_system.system())
         .add_system(print_system.system())
         .run();
 }
@@ -128,3 +129,25 @@ fn save_scene_system(_world: &mut World, resources: &mut Resources) {
 
     // TODO: save scene
 }
+
+// This is only necessary for the info message in the UI. See examples/ui/text.rs for a standalone text example.
+fn infotext_system(mut commands: Commands, asset_server: Res<AssetServer>) {
+    let font_handle = asset_server.load("assets/fonts/FiraSans-Bold.ttf").unwrap();
+    commands
+        .spawn(UiCameraComponents::default())
+        .spawn(TextComponents {
+            style: Style {
+                align_self: AlignSelf::FlexEnd,
+                ..Default::default()
+            },
+            text: Text {
+                value: "Nothing to see in this window! Check the console output!".to_string(),
+                font: font_handle,
+                style: TextStyle {
+                    font_size: 50.0,
+                    color: Color::WHITE,
+                },
+            },
+            ..Default::default()
+        });
+}

rustfmt.toml

@@ -1,3 +1,4 @@
+unstable_features = true
 merge_imports = true
 use_field_init_shorthand = true
 reorder_impl_items = true

src/prelude.rs

@@ -1,8 +1,8 @@
 pub use crate::{
-    app::prelude::*, asset::prelude::*, core::prelude::*, ecs::prelude::*,
-    input::prelude::*, math::prelude::*, pbr::prelude::*, property::prelude::*, render::prelude::*,
-    scene::prelude::*, sprite::prelude::*, text::prelude::*, transform::prelude::*,
-    type_registry::RegisterType, ui::prelude::*, window::prelude::*, AddDefaultPlugins,
+    app::prelude::*, asset::prelude::*, core::prelude::*, ecs::prelude::*, input::prelude::*,
+    math::prelude::*, pbr::prelude::*, property::prelude::*, render::prelude::*, scene::prelude::*,
+    sprite::prelude::*, text::prelude::*, transform::prelude::*, type_registry::RegisterType,
+    ui::prelude::*, window::prelude::*, AddDefaultPlugins,
 };
 
 #[cfg(feature = "bevy_audio")]