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https://github.com/bevyengine/bevy
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200 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
IceSentry
|
b1fd9eddbb
|
Fix post processing example to only run effect on camera with settings component (#10560)
# Objective - The example says it will only run on a camera with the `PostProcessingSettings` component but the node never filters it. ## Solution - Add the component to the `ViewQuery` closes: https://github.com/bevyengine/bevy/issues/10541 |
||
|
IceSentry
|
b1aa74d511
|
Add shader_material_2d example (#10542)
# Objective - 2d materials have subtle differences with 3d materials that aren't obvious to beginners ## Solution - Add an example that shows how to make a 2d material |
||
Aevyrie
|
1918608b02
|
Update default ClearColor to better match Bevy's branding (#10339)
# Objective - Changes the default clear color to match the code block color on Bevy's website. ## Solution - Changed the clear color, updated text in examples to ensure adequate contrast. Inconsistent usage of white text color set to use the default color instead, which is already white. - Additionally, updated the `3d_scene` example to make it look a bit better, and use bevy's branding colors.  |
||
robtfm
|
6f2a5cb862
|
Bind group entries (#9694)
# Objective Simplify bind group creation code. alternative to (and based on) #9476 ## Solution - Add a `BindGroupEntries` struct that can transparently be used where `&[BindGroupEntry<'b>]` is required in BindGroupDescriptors. Allows constructing the descriptor's entries as: ```rust render_device.create_bind_group( "my_bind_group", &my_layout, &BindGroupEntries::with_indexes(( (2, &my_sampler), (3, my_uniform), )), ); ``` instead of ```rust render_device.create_bind_group( "my_bind_group", &my_layout, &[ BindGroupEntry { binding: 2, resource: BindingResource::Sampler(&my_sampler), }, BindGroupEntry { binding: 3, resource: my_uniform, }, ], ); ``` or ```rust render_device.create_bind_group( "my_bind_group", &my_layout, &BindGroupEntries::sequential((&my_sampler, my_uniform)), ); ``` instead of ```rust render_device.create_bind_group( "my_bind_group", &my_layout, &[ BindGroupEntry { binding: 0, resource: BindingResource::Sampler(&my_sampler), }, BindGroupEntry { binding: 1, resource: my_uniform, }, ], ); ``` the structs has no user facing macros, is tuple-type-based so stack allocated, and has no noticeable impact on compile time. - Also adds a `DynamicBindGroupEntries` struct with a similar api that uses a `Vec` under the hood and allows extending the entries. - Modifies `RenderDevice::create_bind_group` to take separate arguments `label`, `layout` and `entries` instead of a `BindGroupDescriptor` struct. The struct can't be stored due to the internal references, and with only 3 members arguably does not add enough context to justify itself. - Modify the codebase to use the new api and the `BindGroupEntries` / `DynamicBindGroupEntries` structs where appropriate (whenever the entries slice contains more than 1 member). ## Migration Guide - Calls to `RenderDevice::create_bind_group({BindGroupDescriptor { label, layout, entries })` must be amended to `RenderDevice::create_bind_group(label, layout, entries)`. - If `label`s have been specified as `"bind_group_name".into()`, they need to change to just `"bind_group_name"`. `Some("bind_group_name")` and `None` will still work, but `Some("bind_group_name")` can optionally be simplified to just `"bind_group_name"`. --------- Co-authored-by: IceSentry <IceSentry@users.noreply.github.com> |
||
|
robtfm
|
c99351f7c2
|
allow extensions to StandardMaterial (#7820)
# Objective allow extending `Material`s (including the built in `StandardMaterial`) with custom vertex/fragment shaders and additional data, to easily get pbr lighting with custom modifications, or otherwise extend a base material. # Solution - added `ExtendedMaterial<B: Material, E: MaterialExtension>` which contains a base material and a user-defined extension. - added example `extended_material` showing how to use it - modified AsBindGroup to have "unprepared" functions that return raw resources / layout entries so that the extended material can combine them note: doesn't currently work with array resources, as i can't figure out how to make the OwnedBindingResource::get_binding() work, as wgpu requires a `&'a[&'a TextureView]` and i have a `Vec<TextureView>`. # Migration Guide manual implementations of `AsBindGroup` will need to be adjusted, the changes are pretty straightforward and can be seen in the diff for e.g. the `texture_binding_array` example. --------- Co-authored-by: Robert Swain <robert.swain@gmail.com> |
||
Carter Anderson
|
35073cf7aa
|
Multiple Asset Sources (#9885)
This adds support for **Multiple Asset Sources**. You can now register a
named `AssetSource`, which you can load assets from like you normally
would:
```rust
let shader: Handle<Shader> = asset_server.load("custom_source://path/to/shader.wgsl");
```
Notice that `AssetPath` now supports `some_source://` syntax. This can
now be accessed through the `asset_path.source()` accessor.
Asset source names _are not required_. If one is not specified, the
default asset source will be used:
```rust
let shader: Handle<Shader> = asset_server.load("path/to/shader.wgsl");
```
The behavior of the default asset source has not changed. Ex: the
`assets` folder is still the default.
As referenced in #9714
## Why?
**Multiple Asset Sources** enables a number of often-asked-for
scenarios:
* **Loading some assets from other locations on disk**: you could create
a `config` asset source that reads from the OS-default config folder
(not implemented in this PR)
* **Loading some assets from a remote server**: you could register a new
`remote` asset source that reads some assets from a remote http server
(not implemented in this PR)
* **Improved "Binary Embedded" Assets**: we can use this system for
"embedded-in-binary assets", which allows us to replace the old
`load_internal_asset!` approach, which couldn't support asset
processing, didn't support hot-reloading _well_, and didn't make
embedded assets accessible to the `AssetServer` (implemented in this pr)
## Adding New Asset Sources
An `AssetSource` is "just" a collection of `AssetReader`, `AssetWriter`,
and `AssetWatcher` entries. You can configure new asset sources like
this:
```rust
app.register_asset_source(
"other",
AssetSource::build()
.with_reader(|| Box::new(FileAssetReader::new("other")))
)
)
```
Note that `AssetSource` construction _must_ be repeatable, which is why
a closure is accepted.
`AssetSourceBuilder` supports `with_reader`, `with_writer`,
`with_watcher`, `with_processed_reader`, `with_processed_writer`, and
`with_processed_watcher`.
Note that the "asset source" system replaces the old "asset providers"
system.
## Processing Multiple Sources
The `AssetProcessor` now supports multiple asset sources! Processed
assets can refer to assets in other sources and everything "just works".
Each `AssetSource` defines an unprocessed and processed `AssetReader` /
`AssetWriter`.
Currently this is all or nothing for a given `AssetSource`. A given
source is either processed or it is not. Later we might want to add
support for "lazy asset processing", where an `AssetSource` (such as a
remote server) can be configured to only process assets that are
directly referenced by local assets (in order to save local disk space
and avoid doing extra work).
## A new `AssetSource`: `embedded`
One of the big features motivating **Multiple Asset Sources** was
improving our "embedded-in-binary" asset loading. To prove out the
**Multiple Asset Sources** implementation, I chose to build a new
`embedded` `AssetSource`, which replaces the old `load_interal_asset!`
system.
The old `load_internal_asset!` approach had a number of issues:
* The `AssetServer` was not aware of (or capable of loading) internal
assets.
* Because internal assets weren't visible to the `AssetServer`, they
could not be processed (or used by assets that are processed). This
would prevent things "preprocessing shaders that depend on built in Bevy
shaders", which is something we desperately need to start doing.
* Each "internal asset" needed a UUID to be defined in-code to reference
it. This was very manual and toilsome.
The new `embedded` `AssetSource` enables the following pattern:
```rust
// Called in `crates/bevy_pbr/src/render/mesh.rs`
embedded_asset!(app, "mesh.wgsl");
// later in the app
let shader: Handle<Shader> = asset_server.load("embedded://bevy_pbr/render/mesh.wgsl");
```
Notice that this always treats the crate name as the "root path", and it
trims out the `src` path for brevity. This is generally predictable, but
if you need to debug you can use the new `embedded_path!` macro to get a
`PathBuf` that matches the one used by `embedded_asset`.
You can also reference embedded assets in arbitrary assets, such as WGSL
shaders:
```rust
#import "embedded://bevy_pbr/render/mesh.wgsl"
```
This also makes `embedded` assets go through the "normal" asset
lifecycle. They are only loaded when they are actually used!
We are also discussing implicitly converting asset paths to/from shader
modules, so in the future (not in this PR) you might be able to load it
like this:
```rust
#import bevy_pbr::render::mesh::Vertex
```
Compare that to the old system!
```rust
pub const MESH_SHADER_HANDLE: Handle<Shader> = Handle::weak_from_u128(3252377289100772450);
load_internal_asset!(app, MESH_SHADER_HANDLE, "mesh.wgsl", Shader::from_wgsl);
// The mesh asset is the _only_ accessible via MESH_SHADER_HANDLE and _cannot_ be loaded via the AssetServer.
```
## Hot Reloading `embedded`
You can enable `embedded` hot reloading by enabling the
`embedded_watcher` cargo feature:
```
cargo run --features=embedded_watcher
```
## Improved Hot Reloading Workflow
First: the `filesystem_watcher` cargo feature has been renamed to
`file_watcher` for brevity (and to match the `FileAssetReader` naming
convention).
More importantly, hot asset reloading is no longer configured in-code by
default. If you enable any asset watcher feature (such as `file_watcher`
or `rust_source_watcher`), asset watching will be automatically enabled.
This removes the need to _also_ enable hot reloading in your app code.
That means you can replace this:
```rust
app.add_plugins(DefaultPlugins.set(AssetPlugin::default().watch_for_changes()))
```
with this:
```rust
app.add_plugins(DefaultPlugins)
```
If you want to hot reload assets in your app during development, just
run your app like this:
```
cargo run --features=file_watcher
```
This means you can use the same code for development and deployment! To
deploy an app, just don't include the watcher feature
```
cargo build --release
```
My intent is to move to this approach for pretty much all dev workflows.
In a future PR I would like to replace `AssetMode::ProcessedDev` with a
`runtime-processor` cargo feature. We could then group all common "dev"
cargo features under a single `dev` feature:
```sh
# this would enable file_watcher, embedded_watcher, runtime-processor, and more
cargo run --features=dev
```
## AssetMode
`AssetPlugin::Unprocessed`, `AssetPlugin::Processed`, and
`AssetPlugin::ProcessedDev` have been replaced with an `AssetMode` field
on `AssetPlugin`.
```rust
// before
app.add_plugins(DefaultPlugins.set(AssetPlugin::Processed { /* fields here */ })
// after
app.add_plugins(DefaultPlugins.set(AssetPlugin { mode: AssetMode::Processed, ..default() })
```
This aligns `AssetPlugin` with our other struct-like plugins. The old
"source" and "destination" `AssetProvider` fields in the enum variants
have been replaced by the "asset source" system. You no longer need to
configure the AssetPlugin to "point" to custom asset providers.
## AssetServerMode
To improve the implementation of **Multiple Asset Sources**,
`AssetServer` was made aware of whether or not it is using "processed"
or "unprocessed" assets. You can check that like this:
```rust
if asset_server.mode() == AssetServerMode::Processed {
/* do something */
}
```
Note that this refactor should also prepare the way for building "one to
many processed output files", as it makes the server aware of whether it
is loading from processed or unprocessed sources. Meaning we can store
and read processed and unprocessed assets differently!
## AssetPath can now refer to folders
The "file only" restriction has been removed from `AssetPath`. The
`AssetServer::load_folder` API now accepts an `AssetPath` instead of a
`Path`, meaning you can load folders from other asset sources!
## Improved AssetPath Parsing
AssetPath parsing was reworked to support sources, improve error
messages, and to enable parsing with a single pass over the string.
`AssetPath::new` was replaced by `AssetPath::parse` and
`AssetPath::try_parse`.
## AssetWatcher broken out from AssetReader
`AssetReader` is no longer responsible for constructing `AssetWatcher`.
This has been moved to `AssetSourceBuilder`.
## Duplicate Event Debouncing
Asset V2 already debounced duplicate filesystem events, but this was
_input_ events. Multiple input event types can produce the same _output_
`AssetSourceEvent`. Now that we have `embedded_watcher`, which does
expensive file io on events, it made sense to debounce output events
too, so I added that! This will also benefit the AssetProcessor by
preventing integrity checks for duplicate events (and helps keep the
noise down in trace logs).
## Next Steps
* **Port Built-in Shaders**: Currently the primary (and essentially
only) user of `load_interal_asset` in Bevy's source code is "built-in
shaders". I chose not to do that in this PR for a few reasons:
1. We need to add the ability to pass shader defs in to shaders via meta
files. Some shaders (such as MESH_VIEW_TYPES) need to pass shader def
values in that are defined in code.
2. We need to revisit the current shader module naming system. I think
we _probably_ want to imply modules from source structure (at least by
default). Ideally in a way that can losslessly convert asset paths
to/from shader modules (to enable the asset system to resolve modules
using the asset server).
3. I want to keep this change set minimal / get this merged first.
* **Deprecate `load_internal_asset`**: we can't do that until we do (1)
and (2)
* **Relative Asset Paths**: This PR significantly increases the need for
relative asset paths (which was already pretty high). Currently when
loading dependencies, it is assumed to be an absolute path, which means
if in an `AssetLoader` you call `context.load("some/path/image.png")` it
will assume that is the "default" asset source, _even if the current
asset is in a different asset source_. This will cause breakage for
AssetLoaders that are not designed to add the current source to whatever
paths are being used. AssetLoaders should generally not need to be aware
of the name of their current asset source, or need to think about the
"current asset source" generally. We should build apis that support
relative asset paths and then encourage using relative paths as much as
possible (both via api design and docs). Relative paths are also
important because they will allow developers to move folders around
(even across providers) without reprocessing, provided there is no path
breakage.
|
||
Marco Buono
|
12a2f83edd
|
Add consuming builder methods for more ergonomic Mesh creation (#10056)
# Objective
- This PR aims to make creating meshes a little bit more ergonomic,
specifically by removing the need for intermediate mutable variables.
## Solution
- We add methods that consume the `Mesh` and return a mesh with the
specified changes, so that meshes can be entirely constructed via
builder-style calls, without intermediate variables;
- Methods are flagged with `#[must_use]` to ensure proper use;
- Examples are updated to use the new methods where applicable. Some
examples are kept with the mutating methods so that users can still
easily discover them, and also where the new methods wouldn't really be
an improvement.
## Examples
Before:
```rust
let mut mesh = Mesh::new(PrimitiveTopology::TriangleList);
mesh.insert_attribute(Mesh::ATTRIBUTE_POSITION, vs);
mesh.insert_attribute(Mesh::ATTRIBUTE_NORMAL, vns);
mesh.insert_attribute(Mesh::ATTRIBUTE_UV_0, vts);
mesh.set_indices(Some(Indices::U32(tris)));
mesh
```
After:
```rust
Mesh::new(PrimitiveTopology::TriangleList)
.with_inserted_attribute(Mesh::ATTRIBUTE_POSITION, vs)
.with_inserted_attribute(Mesh::ATTRIBUTE_NORMAL, vns)
.with_inserted_attribute(Mesh::ATTRIBUTE_UV_0, vts)
.with_indices(Some(Indices::U32(tris)))
```
Before:
```rust
let mut cube = Mesh::from(shape::Cube { size: 1.0 });
cube.generate_tangents().unwrap();
PbrBundle {
mesh: meshes.add(cube),
..default()
}
```
After:
```rust
PbrBundle {
mesh: meshes.add(
Mesh::from(shape::Cube { size: 1.0 })
.with_generated_tangents()
.unwrap(),
),
..default()
}
```
---
## Changelog
- Added consuming builder methods for more ergonomic `Mesh` creation:
`with_inserted_attribute()`, `with_removed_attribute()`,
`with_indices()`, `with_duplicated_vertices()`,
`with_computed_flat_normals()`, `with_generated_tangents()`,
`with_morph_targets()`, `with_morph_target_names()`.
|
||
Ame :]
|
7541bf862c
|
Fix some warnings shown in nightly (#10012)
# Objective
Fix warnings:
- #[warn(clippy::needless_pass_by_ref_mut)]
- #[warn(elided_lifetimes_in_associated_constant)]
## Solution
- Remove mut
- add &'static
## Errors
```rust
warning: this argument is a mutable reference, but not used mutably
--> crates/bevy_hierarchy/src/child_builder.rs:672:31
|
672 | fn assert_children(world: &mut World, parent: Entity, children: Option<&[Entity]>) {
| ^^^^^^^^^^ help: consider changing to: `&World`
|
= note: this is cfg-gated and may require further changes
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
= note: `#[warn(clippy::needless_pass_by_ref_mut)]` on by default
```
```rust
warning: `&` without an explicit lifetime name cannot be used here
--> examples/shader/post_processing.rs:120:21
|
120 | pub const NAME: &str = "post_process";
| ^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
= note: `#[warn(elided_lifetimes_in_associated_constant)]` on by default
help: use the `'static` lifetime
|
120 | pub const NAME: &'static str = "post_process";
| +++++++
```
|
||
Robert Swain
|
b6ead2be95
|
Use EntityHashMap<Entity, T> for render world entity storage for better performance (#9903)
# Objective - Improve rendering performance, particularly by avoiding the large system commands costs of using the ECS in the way that the render world does. ## Solution - Define `EntityHasher` that calculates a hash from the `Entity.to_bits()` by `i | (i.wrapping_mul(0x517cc1b727220a95) << 32)`. `0x517cc1b727220a95` is something like `u64::MAX / N` for N that gives a value close to π and that works well for hashing. Thanks for @SkiFire13 for the suggestion and to @nicopap for alternative suggestions and discussion. This approach comes from `rustc-hash` (a.k.a. `FxHasher`) with some tweaks for the case of hashing an `Entity`. `FxHasher` and `SeaHasher` were also tested but were significantly slower. - Define `EntityHashMap` type that uses the `EntityHashser` - Use `EntityHashMap<Entity, T>` for render world entity storage, including: - `RenderMaterialInstances` - contains the `AssetId<M>` of the material associated with the entity. Also for 2D. - `RenderMeshInstances` - contains mesh transforms, flags and properties about mesh entities. Also for 2D. - `SkinIndices` and `MorphIndices` - contains the skin and morph index for an entity, respectively - `ExtractedSprites` - `ExtractedUiNodes` ## Benchmarks All benchmarks have been conducted on an M1 Max connected to AC power. The tests are run for 1500 frames. The 1000th frame is captured for comparison to check for visual regressions. There were none. ### 2D Meshes `bevymark --benchmark --waves 160 --per-wave 1000 --mode mesh2d` #### `--ordered-z` This test spawns the 2D meshes with z incrementing back to front, which is the ideal arrangement allocation order as it matches the sorted render order which means lookups have a high cache hit rate. <img width="1112" alt="Screenshot 2023-09-27 at 07 50 45" src="https://github.com/bevyengine/bevy/assets/302146/e140bc98-7091-4a3b-8ae1-ab75d16d2ccb"> -39.1% median frame time. #### Random This test spawns the 2D meshes with random z. This not only makes the batching and transparent 2D pass lookups get a lot of cache misses, it also currently means that the meshes are almost certain to not be batchable. <img width="1108" alt="Screenshot 2023-09-27 at 07 51 28" src="https://github.com/bevyengine/bevy/assets/302146/29c2e813-645a-43ce-982a-55df4bf7d8c4"> -7.2% median frame time. ### 3D Meshes `many_cubes --benchmark` <img width="1112" alt="Screenshot 2023-09-27 at 07 51 57" src="https://github.com/bevyengine/bevy/assets/302146/1a729673-3254-4e2a-9072-55e27c69f0fc"> -7.7% median frame time. ### Sprites **NOTE: On `main` sprites are using `SparseSet<Entity, T>`!** `bevymark --benchmark --waves 160 --per-wave 1000 --mode sprite` #### `--ordered-z` This test spawns the sprites with z incrementing back to front, which is the ideal arrangement allocation order as it matches the sorted render order which means lookups have a high cache hit rate. <img width="1116" alt="Screenshot 2023-09-27 at 07 52 31" src="https://github.com/bevyengine/bevy/assets/302146/bc8eab90-e375-4d31-b5cd-f55f6f59ab67"> +13.0% median frame time. #### Random This test spawns the sprites with random z. This makes the batching and transparent 2D pass lookups get a lot of cache misses. <img width="1109" alt="Screenshot 2023-09-27 at 07 53 01" src="https://github.com/bevyengine/bevy/assets/302146/22073f5d-99a7-49b0-9584-d3ac3eac3033"> +0.6% median frame time. ### UI **NOTE: On `main` UI is using `SparseSet<Entity, T>`!** `many_buttons` <img width="1111" alt="Screenshot 2023-09-27 at 07 53 26" src="https://github.com/bevyengine/bevy/assets/302146/66afd56d-cbe4-49e7-8b64-2f28f6043d85"> +15.1% median frame time. ## Alternatives - Cart originally suggested trying out `SparseSet<Entity, T>` and indeed that is slightly faster under ideal conditions. However, `PassHashMap<Entity, T>` has better worst case performance when data is randomly distributed, rather than in sorted render order, and does not have the worst case memory usage that `SparseSet`'s dense `Vec<usize>` that maps from the `Entity` index to sparse index into `Vec<T>`. This dense `Vec` has to be as large as the largest Entity index used with the `SparseSet`. - I also tested `PassHashMap<u32, T>`, intending to use `Entity.index()` as the key, but this proved to sometimes be slower and mostly no different. - The only outstanding approach that has not been implemented and tested is to _not_ clear the render world of its entities each frame. That has its own problems, though they could perhaps be solved. - Performance-wise, if the entities and their component data were not cleared, then they would incur table moves on spawn, and should not thereafter, rather just their component data would be overwritten. Ideally we would have a neat way of either updating data in-place via `&mut T` queries, or inserting components if not present. This would likely be quite cumbersome to have to remember to do everywhere, but perhaps it only needs to be done in the more performance-sensitive systems. - The main problem to solve however is that we want to both maintain a mapping between main world entities and render world entities, be able to run the render app and world in parallel with the main app and world for pipelined rendering, and at the same time be able to spawn entities in the render world in such a way that those Entity ids do not collide with those spawned in the main world. This is potentially quite solvable, but could well be a lot of ECS work to do it in a way that makes sense. --- ## Changelog - Changed: Component data for entities to be drawn are no longer stored on entities in the render world. Instead, data is stored in a `EntityHashMap<Entity, T>` in various resources. This brings significant performance benefits due to the way the render app clears entities every frame. Resources of most interest are `RenderMeshInstances` and `RenderMaterialInstances`, and their 2D counterparts. ## Migration Guide Previously the render app extracted mesh entities and their component data from the main world and stored them as entities and components in the render world. Now they are extracted into essentially `EntityHashMap<Entity, T>` where `T` are structs containing an appropriate group of data. This means that while extract set systems will continue to run extract queries against the main world they will store their data in hash maps. Also, systems in later sets will either need to look up entities in the available resources such as `RenderMeshInstances`, or maintain their own `EntityHashMap<Entity, T>` for their own data. Before: ```rust fn queue_custom( material_meshes: Query<(Entity, &MeshTransforms, &Handle<Mesh>), With<InstanceMaterialData>>, ) { ... for (entity, mesh_transforms, mesh_handle) in &material_meshes { ... } } ``` After: ```rust fn queue_custom( render_mesh_instances: Res<RenderMeshInstances>, instance_entities: Query<Entity, With<InstanceMaterialData>>, ) { ... for entity in &instance_entities { let Some(mesh_instance) = render_mesh_instances.get(&entity) else { continue; }; // The mesh handle in `AssetId<Mesh>` form, and the `MeshTransforms` can now // be found in `mesh_instance` which is a `RenderMeshInstance` ... } } ``` --------- Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com> |
||
|
Robert Swain
|
5c884c5a15
|
Automatic batching/instancing of draw commands (#9685)
# Objective - Implement the foundations of automatic batching/instancing of draw commands as the next step from #89 - NOTE: More performance improvements will come when more data is managed and bound in ways that do not require rebinding such as mesh, material, and texture data. ## Solution - The core idea for batching of draw commands is to check whether any of the information that has to be passed when encoding a draw command changes between two things that are being drawn according to the sorted render phase order. These should be things like the pipeline, bind groups and their dynamic offsets, index/vertex buffers, and so on. - The following assumptions have been made: - Only entities with prepared assets (pipelines, materials, meshes) are queued to phases - View bindings are constant across a phase for a given draw function as phases are per-view - `batch_and_prepare_render_phase` is the only system that performs this batching and has sole responsibility for preparing the per-object data. As such the mesh binding and dynamic offsets are assumed to only vary as a result of the `batch_and_prepare_render_phase` system, e.g. due to having to split data across separate uniform bindings within the same buffer due to the maximum uniform buffer binding size. - Implement `GpuArrayBuffer` for `Mesh2dUniform` to store Mesh2dUniform in arrays in GPU buffers rather than each one being at a dynamic offset in a uniform buffer. This is the same optimisation that was made for 3D not long ago. - Change batch size for a range in `PhaseItem`, adding API for getting or mutating the range. This is more flexible than a size as the length of the range can be used in place of the size, but the start and end can be otherwise whatever is needed. - Add an optional mesh bind group dynamic offset to `PhaseItem`. This avoids having to do a massive table move just to insert `GpuArrayBufferIndex` components. ## Benchmarks All tests have been run on an M1 Max on AC power. `bevymark` and `many_cubes` were modified to use 1920x1080 with a scale factor of 1. I run a script that runs a separate Tracy capture process, and then runs the bevy example with `--features bevy_ci_testing,trace_tracy` and `CI_TESTING_CONFIG=../benchmark.ron` with the contents of `../benchmark.ron`: ```rust ( exit_after: Some(1500) ) ``` ...in order to run each test for 1500 frames. The recent changes to `many_cubes` and `bevymark` added reproducible random number generation so that with the same settings, the same rng will occur. They also added benchmark modes that use a fixed delta time for animations. Combined this means that the same frames should be rendered both on main and on the branch. The graphs compare main (yellow) to this PR (red). ### 3D Mesh `many_cubes --benchmark` <img width="1411" alt="Screenshot 2023-09-03 at 23 42 10" src="https://github.com/bevyengine/bevy/assets/302146/2088716a-c918-486c-8129-090b26fd2bc4"> The mesh and material are the same for all instances. This is basically the best case for the initial batching implementation as it results in 1 draw for the ~11.7k visible meshes. It gives a ~30% reduction in median frame time. The 1000th frame is identical using the flip tool:  ``` Mean: 0.000000 Weighted median: 0.000000 1st weighted quartile: 0.000000 3rd weighted quartile: 0.000000 Min: 0.000000 Max: 0.000000 Evaluation time: 0.4615 seconds ``` ### 3D Mesh `many_cubes --benchmark --material-texture-count 10` <img width="1404" alt="Screenshot 2023-09-03 at 23 45 18" src="https://github.com/bevyengine/bevy/assets/302146/5ee9c447-5bd2-45c6-9706-ac5ff8916daf"> This run uses 10 different materials by varying their textures. The materials are randomly selected, and there is no sorting by material bind group for opaque 3D so any batching is 'random'. The PR produces a ~5% reduction in median frame time. If we were to sort the opaque phase by the material bind group, then this should be a lot faster. This produces about 10.5k draws for the 11.7k visible entities. This makes sense as randomly selecting from 10 materials gives a chance that two adjacent entities randomly select the same material and can be batched. The 1000th frame is identical in flip:  ``` Mean: 0.000000 Weighted median: 0.000000 1st weighted quartile: 0.000000 3rd weighted quartile: 0.000000 Min: 0.000000 Max: 0.000000 Evaluation time: 0.4537 seconds ``` ### 3D Mesh `many_cubes --benchmark --vary-per-instance` <img width="1394" alt="Screenshot 2023-09-03 at 23 48 44" src="https://github.com/bevyengine/bevy/assets/302146/f02a816b-a444-4c18-a96a-63b5436f3b7f"> This run varies the material data per instance by randomly-generating its colour. This is the worst case for batching and that it performs about the same as `main` is a good thing as it demonstrates that the batching has minimal overhead when dealing with ~11k visible mesh entities. The 1000th frame is identical according to flip:  ``` Mean: 0.000000 Weighted median: 0.000000 1st weighted quartile: 0.000000 3rd weighted quartile: 0.000000 Min: 0.000000 Max: 0.000000 Evaluation time: 0.4568 seconds ``` ### 2D Mesh `bevymark --benchmark --waves 160 --per-wave 1000 --mode mesh2d` <img width="1412" alt="Screenshot 2023-09-03 at 23 59 56" src="https://github.com/bevyengine/bevy/assets/302146/cb02ae07-237b-4646-ae9f-fda4dafcbad4"> This spawns 160 waves of 1000 quad meshes that are shaded with ColorMaterial. Each wave has a different material so 160 waves currently should result in 160 batches. This results in a 50% reduction in median frame time. Capturing a screenshot of the 1000th frame main vs PR gives:  ``` Mean: 0.001222 Weighted median: 0.750432 1st weighted quartile: 0.453494 3rd weighted quartile: 0.969758 Min: 0.000000 Max: 0.990296 Evaluation time: 0.4255 seconds ``` So they seem to produce the same results. I also double-checked the number of draws. `main` does 160000 draws, and the PR does 160, as expected. ### 2D Mesh `bevymark --benchmark --waves 160 --per-wave 1000 --mode mesh2d --material-texture-count 10` <img width="1392" alt="Screenshot 2023-09-04 at 00 09 22" src="https://github.com/bevyengine/bevy/assets/302146/4358da2e-ce32-4134-82df-3ab74c40849c"> This generates 10 textures and generates materials for each of those and then selects one material per wave. The median frame time is reduced by 50%. Similar to the plain run above, this produces 160 draws on the PR and 160000 on `main` and the 1000th frame is identical (ignoring the fps counter text overlay).  ``` Mean: 0.002877 Weighted median: 0.964980 1st weighted quartile: 0.668871 3rd weighted quartile: 0.982749 Min: 0.000000 Max: 0.992377 Evaluation time: 0.4301 seconds ``` ### 2D Mesh `bevymark --benchmark --waves 160 --per-wave 1000 --mode mesh2d --vary-per-instance` <img width="1396" alt="Screenshot 2023-09-04 at 00 13 53" src="https://github.com/bevyengine/bevy/assets/302146/b2198b18-3439-47ad-919a-cdabe190facb"> This creates unique materials per instance by randomly-generating the material's colour. This is the worst case for 2D batching. Somehow, this PR manages a 7% reduction in median frame time. Both main and this PR issue 160000 draws. The 1000th frame is the same:  ``` Mean: 0.001214 Weighted median: 0.937499 1st weighted quartile: 0.635467 3rd weighted quartile: 0.979085 Min: 0.000000 Max: 0.988971 Evaluation time: 0.4462 seconds ``` ### 2D Sprite `bevymark --benchmark --waves 160 --per-wave 1000 --mode sprite` <img width="1396" alt="Screenshot 2023-09-04 at 12 21 12" src="https://github.com/bevyengine/bevy/assets/302146/8b31e915-d6be-4cac-abf5-c6a4da9c3d43"> This just spawns 160 waves of 1000 sprites. There should be and is no notable difference between main and the PR. ### 2D Sprite `bevymark --benchmark --waves 160 --per-wave 1000 --mode sprite --material-texture-count 10` <img width="1389" alt="Screenshot 2023-09-04 at 12 36 08" src="https://github.com/bevyengine/bevy/assets/302146/45fe8d6d-c901-4062-a349-3693dd044413"> This spawns the sprites selecting a texture at random per instance from the 10 generated textures. This has no significant change vs main and shouldn't. ### 2D Sprite `bevymark --benchmark --waves 160 --per-wave 1000 --mode sprite --vary-per-instance` <img width="1401" alt="Screenshot 2023-09-04 at 12 29 52" src="https://github.com/bevyengine/bevy/assets/302146/762c5c60-352e-471f-8dbe-bbf10e24ebd6"> This sets the sprite colour as being unique per instance. This can still all be drawn using one batch. There should be no difference but the PR produces median frame times that are 4% higher. Investigation showed no clear sources of cost, rather a mix of give and take that should not happen. It seems like noise in the results. ### Summary | Benchmark | % change in median frame time | | ------------- | ------------- | | many_cubes | 🟩 -30% | | many_cubes 10 materials | 🟩 -5% | | many_cubes unique materials | 🟩 ~0% | | bevymark mesh2d | 🟩 -50% | | bevymark mesh2d 10 materials | 🟩 -50% | | bevymark mesh2d unique materials | 🟩 -7% | | bevymark sprite | 🟥 2% | | bevymark sprite 10 materials | 🟥 0.6% | | bevymark sprite unique materials | 🟥 4.1% | --- ## Changelog - Added: 2D and 3D mesh entities that share the same mesh and material (same textures, same data) are now batched into the same draw command for better performance. --------- Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com> Co-authored-by: Nicola Papale <nico@nicopap.ch> |
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Carter Anderson
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17edf4f7c7
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Copy on Write AssetPaths (#9729)
# Objective The `AssetServer` and `AssetProcessor` do a lot of `AssetPath` cloning (across many threads). To store the path on the handle, to store paths in dependency lists, to pass an owned path to the offloaded thread, to pass a path to the LoadContext, etc , etc. Cloning multiple string allocations multiple times like this will add up. It is worth optimizing this. Referenced in #9714 ## Solution Added a new `CowArc<T>` type to `bevy_util`, which behaves a lot like `Cow<T>`, but the Owned variant is an `Arc<T>`. Use this in place of `Cow<str>` and `Cow<Path>` on `AssetPath`. --- ## Changelog - `AssetPath` now internally uses `CowArc`, making clone operations much cheaper - `AssetPath` now serializes as `AssetPath("some_path.extension#Label")` instead of as `AssetPath { path: "some_path.extension", label: Some("Label) }` ## Migration Guide ```rust // Old AssetPath::new("logo.png", None); // New AssetPath::new("logo.png"); // Old AssetPath::new("scene.gltf", Some("Mesh0"); // New AssetPath::new("scene.gltf").with_label("Mesh0"); ``` `AssetPath` now serializes as `AssetPath("some_path.extension#Label")` instead of as `AssetPath { path: "some_path.extension", label: Some("Label) }` --------- Co-authored-by: Pascal Hertleif <killercup@gmail.com> |
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Carter Anderson
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5eb292dc10
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Bevy Asset V2 (#8624)
# Bevy Asset V2 Proposal ## Why Does Bevy Need A New Asset System? Asset pipelines are a central part of the gamedev process. Bevy's current asset system is missing a number of features that make it non-viable for many classes of gamedev. After plenty of discussions and [a long community feedback period](https://github.com/bevyengine/bevy/discussions/3972), we've identified a number missing features: * **Asset Preprocessing**: it should be possible to "preprocess" / "compile" / "crunch" assets at "development time" rather than when the game starts up. This enables offloading expensive work from deployed apps, faster asset loading, less runtime memory usage, etc. * **Per-Asset Loader Settings**: Individual assets cannot define their own loaders that override the defaults. Additionally, they cannot provide per-asset settings to their loaders. This is a huge limitation, as many asset types don't provide all information necessary for Bevy _inside_ the asset. For example, a raw PNG image says nothing about how it should be sampled (ex: linear vs nearest). * **Asset `.meta` files**: assets should have configuration files stored adjacent to the asset in question, which allows the user to configure asset-type-specific settings. These settings should be accessible during the pre-processing phase. Modifying a `.meta` file should trigger a re-processing / re-load of the asset. It should be possible to configure asset loaders from the meta file. * **Processed Asset Hot Reloading**: Changes to processed assets (or their dependencies) should result in re-processing them and re-loading the results in live Bevy Apps. * **Asset Dependency Tracking**: The current bevy_asset has no good way to wait for asset dependencies to load. It punts this as an exercise for consumers of the loader apis, which is unreasonable and error prone. There should be easy, ergonomic ways to wait for assets to load and block some logic on an asset's entire dependency tree loading. * **Runtime Asset Loading**: it should be (optionally) possible to load arbitrary assets dynamically at runtime. This necessitates being able to deploy and run the asset server alongside Bevy Apps on _all platforms_. For example, we should be able to invoke the shader compiler at runtime, stream scenes from sources like the internet, etc. To keep deployed binaries (and startup times) small, the runtime asset server configuration should be configurable with different settings compared to the "pre processor asset server". * **Multiple Backends**: It should be possible to load assets from arbitrary sources (filesystems, the internet, remote asset serves, etc). * **Asset Packing**: It should be possible to deploy assets in compressed "packs", which makes it easier and more efficient to distribute assets with Bevy Apps. * **Asset Handoff**: It should be possible to hold a "live" asset handle, which correlates to runtime data, without actually holding the asset in memory. Ex: it must be possible to hold a reference to a GPU mesh generated from a "mesh asset" without keeping the mesh data in CPU memory * **Per-Platform Processed Assets**: Different platforms and app distributions have different capabilities and requirements. Some platforms need lower asset resolutions or different asset formats to operate within the hardware constraints of the platform. It should be possible to define per-platform asset processing profiles. And it should be possible to deploy only the assets required for a given platform. These features have architectural implications that are significant enough to require a full rewrite. The current Bevy Asset implementation got us this far, but it can take us no farther. This PR defines a brand new asset system that implements most of these features, while laying the foundations for the remaining features to be built. ## Bevy Asset V2 Here is a quick overview of the features introduced in this PR. * **Asset Preprocessing**: Preprocess assets at development time into more efficient (and configurable) representations * **Dependency Aware**: Dependencies required to process an asset are tracked. If an asset's processed dependency changes, it will be reprocessed * **Hot Reprocessing/Reloading**: detect changes to asset source files, reprocess them if they have changed, and then hot-reload them in Bevy Apps. * **Only Process Changes**: Assets are only re-processed when their source file (or meta file) has changed. This uses hashing and timestamps to avoid processing assets that haven't changed. * **Transactional and Reliable**: Uses write-ahead logging (a technique commonly used by databases) to recover from crashes / forced-exits. Whenever possible it avoids full-reprocessing / only uncompleted transactions will be reprocessed. When the processor is running in parallel with a Bevy App, processor asset writes block Bevy App asset reads. Reading metadata + asset bytes is guaranteed to be transactional / correctly paired. * **Portable / Run anywhere / Database-free**: The processor does not rely on an in-memory database (although it uses some database techniques for reliability). This is important because pretty much all in-memory databases have unsupported platforms or build complications. * **Configure Processor Defaults Per File Type**: You can say "use this processor for all files of this type". * **Custom Processors**: The `Processor` trait is flexible and unopinionated. It can be implemented by downstream plugins. * **LoadAndSave Processors**: Most asset processing scenarios can be expressed as "run AssetLoader A, save the results using AssetSaver X, and then load the result using AssetLoader B". For example, load this png image using `PngImageLoader`, which produces an `Image` asset and then save it using `CompressedImageSaver` (which also produces an `Image` asset, but in a compressed format), which takes an `Image` asset as input. This means if you have an `AssetLoader` for an asset, you are already half way there! It also means that you can share AssetSavers across multiple loaders. Because `CompressedImageSaver` accepts Bevy's generic Image asset as input, it means you can also use it with some future `JpegImageLoader`. * **Loader and Saver Settings**: Asset Loaders and Savers can now define their own settings types, which are passed in as input when an asset is loaded / saved. Each asset can define its own settings. * **Asset `.meta` files**: configure asset loaders, their settings, enable/disable processing, and configure processor settings * **Runtime Asset Dependency Tracking** Runtime asset dependencies (ex: if an asset contains a `Handle<Image>`) are tracked by the asset server. An event is emitted when an asset and all of its dependencies have been loaded * **Unprocessed Asset Loading**: Assets do not require preprocessing. They can be loaded directly. A processed asset is just a "normal" asset with some extra metadata. Asset Loaders don't need to know or care about whether or not an asset was processed. * **Async Asset IO**: Asset readers/writers use async non-blocking interfaces. Note that because Rust doesn't yet support async traits, there is a bit of manual Boxing / Future boilerplate. This will hopefully be removed in the near future when Rust gets async traits. * **Pluggable Asset Readers and Writers**: Arbitrary asset source readers/writers are supported, both by the processor and the asset server. * **Better Asset Handles** * **Single Arc Tree**: Asset Handles now use a single arc tree that represents the lifetime of the asset. This makes their implementation simpler, more efficient, and allows us to cheaply attach metadata to handles. Ex: the AssetPath of a handle is now directly accessible on the handle itself! * **Const Typed Handles**: typed handles can be constructed in a const context. No more weird "const untyped converted to typed at runtime" patterns! * **Handles and Ids are Smaller / Faster To Hash / Compare**: Typed `Handle<T>` is now much smaller in memory and `AssetId<T>` is even smaller. * **Weak Handle Usage Reduction**: In general Handles are now considered to be "strong". Bevy features that previously used "weak `Handle<T>`" have been ported to `AssetId<T>`, which makes it statically clear that the features do not hold strong handles (while retaining strong type information). Currently Handle::Weak still exists, but it is very possible that we can remove that entirely. * **Efficient / Dense Asset Ids**: Assets now have efficient dense runtime asset ids, which means we can avoid expensive hash lookups. Assets are stored in Vecs instead of HashMaps. There are now typed and untyped ids, which means we no longer need to store dynamic type information in the ID for typed handles. "AssetPathId" (which was a nightmare from a performance and correctness standpoint) has been entirely removed in favor of dense ids (which are retrieved for a path on load) * **Direct Asset Loading, with Dependency Tracking**: Assets that are defined at runtime can still have their dependencies tracked by the Asset Server (ex: if you create a material at runtime, you can still wait for its textures to load). This is accomplished via the (currently optional) "asset dependency visitor" trait. This system can also be used to define a set of assets to load, then wait for those assets to load. * **Async folder loading**: Folder loading also uses this system and immediately returns a handle to the LoadedFolder asset, which means folder loading no longer blocks on directory traversals. * **Improved Loader Interface**: Loaders now have a specific "top level asset type", which makes returning the top-level asset simpler and statically typed. * **Basic Image Settings and Processing**: Image assets can now be processed into the gpu-friendly Basic Universal format. The ImageLoader now has a setting to define what format the image should be loaded as. Note that this is just a minimal MVP ... plenty of additional work to do here. To demo this, enable the `basis-universal` feature and turn on asset processing. * **Simpler Audio Play / AudioSink API**: Asset handle providers are cloneable, which means the Audio resource can mint its own handles. This means you can now do `let sink_handle = audio.play(music)` instead of `let sink_handle = audio_sinks.get_handle(audio.play(music))`. Note that this might still be replaced by https://github.com/bevyengine/bevy/pull/8424. **Removed Handle Casting From Engine Features**: Ex: FontAtlases no longer use casting between handle types ## Using The New Asset System ### Normal Unprocessed Asset Loading By default the `AssetPlugin` does not use processing. It behaves pretty much the same way as the old system. If you are defining a custom asset, first derive `Asset`: ```rust #[derive(Asset)] struct Thing { value: String, } ``` Initialize the asset: ```rust app.init_asset:<Thing>() ``` Implement a new `AssetLoader` for it: ```rust #[derive(Default)] struct ThingLoader; #[derive(Serialize, Deserialize, Default)] pub struct ThingSettings { some_setting: bool, } impl AssetLoader for ThingLoader { type Asset = Thing; type Settings = ThingSettings; fn load<'a>( &'a self, reader: &'a mut Reader, settings: &'a ThingSettings, load_context: &'a mut LoadContext, ) -> BoxedFuture<'a, Result<Thing, anyhow::Error>> { Box::pin(async move { let mut bytes = Vec::new(); reader.read_to_end(&mut bytes).await?; // convert bytes to value somehow Ok(Thing { value }) }) } fn extensions(&self) -> &[&str] { &["thing"] } } ``` Note that this interface will get much cleaner once Rust gets support for async traits. `Reader` is an async futures_io::AsyncRead. You can stream bytes as they come in or read them all into a `Vec<u8>`, depending on the context. You can use `let handle = load_context.load(path)` to kick off a dependency load, retrieve a handle, and register the dependency for the asset. Then just register the loader in your Bevy app: ```rust app.init_asset_loader::<ThingLoader>() ``` Now just add your `Thing` asset files into the `assets` folder and load them like this: ```rust fn system(asset_server: Res<AssetServer>) { let handle = Handle<Thing> = asset_server.load("cool.thing"); } ``` You can check load states directly via the asset server: ```rust if asset_server.load_state(&handle) == LoadState::Loaded { } ``` You can also listen for events: ```rust fn system(mut events: EventReader<AssetEvent<Thing>>, handle: Res<SomeThingHandle>) { for event in events.iter() { if event.is_loaded_with_dependencies(&handle) { } } } ``` Note the new `AssetEvent::LoadedWithDependencies`, which only fires when the asset is loaded _and_ all dependencies (and their dependencies) have loaded. Unlike the old asset system, for a given asset path all `Handle<T>` values point to the same underlying Arc. This means Handles can cheaply hold more asset information, such as the AssetPath: ```rust // prints the AssetPath of the handle info!("{:?}", handle.path()) ``` ### Processed Assets Asset processing can be enabled via the `AssetPlugin`. When developing Bevy Apps with processed assets, do this: ```rust app.add_plugins(DefaultPlugins.set(AssetPlugin::processed_dev())) ``` This runs the `AssetProcessor` in the background with hot-reloading. It reads assets from the `assets` folder, processes them, and writes them to the `.imported_assets` folder. Asset loads in the Bevy App will wait for a processed version of the asset to become available. If an asset in the `assets` folder changes, it will be reprocessed and hot-reloaded in the Bevy App. When deploying processed Bevy apps, do this: ```rust app.add_plugins(DefaultPlugins.set(AssetPlugin::processed())) ``` This does not run the `AssetProcessor` in the background. It behaves like `AssetPlugin::unprocessed()`, but reads assets from `.imported_assets`. When the `AssetProcessor` is running, it will populate sibling `.meta` files for assets in the `assets` folder. Meta files for assets that do not have a processor configured look like this: ```rust ( meta_format_version: "1.0", asset: Load( loader: "bevy_render::texture::image_loader::ImageLoader", settings: ( format: FromExtension, ), ), ) ``` This is metadata for an image asset. For example, if you have `assets/my_sprite.png`, this could be the metadata stored at `assets/my_sprite.png.meta`. Meta files are totally optional. If no metadata exists, the default settings will be used. In short, this file says "load this asset with the ImageLoader and use the file extension to determine the image type". This type of meta file is supported in all AssetPlugin modes. If in `Unprocessed` mode, the asset (with the meta settings) will be loaded directly. If in `ProcessedDev` mode, the asset file will be copied directly to the `.imported_assets` folder. The meta will also be copied directly to the `.imported_assets` folder, but with one addition: ```rust ( meta_format_version: "1.0", processed_info: Some(( hash: 12415480888597742505, full_hash: 14344495437905856884, process_dependencies: [], )), asset: Load( loader: "bevy_render::texture::image_loader::ImageLoader", settings: ( format: FromExtension, ), ), ) ``` `processed_info` contains `hash` (a direct hash of the asset and meta bytes), `full_hash` (a hash of `hash` and the hashes of all `process_dependencies`), and `process_dependencies` (the `path` and `full_hash` of every process_dependency). A "process dependency" is an asset dependency that is _directly_ used when processing the asset. Images do not have process dependencies, so this is empty. When the processor is enabled, you can use the `Process` metadata config: ```rust ( meta_format_version: "1.0", asset: Process( processor: "bevy_asset::processor::process::LoadAndSave<bevy_render::texture::image_loader::ImageLoader, bevy_render::texture::compressed_image_saver::CompressedImageSaver>", settings: ( loader_settings: ( format: FromExtension, ), saver_settings: ( generate_mipmaps: true, ), ), ), ) ``` This configures the asset to use the `LoadAndSave` processor, which runs an AssetLoader and feeds the result into an AssetSaver (which saves the given Asset and defines a loader to load it with). (for terseness LoadAndSave will likely get a shorter/friendlier type name when [Stable Type Paths](#7184) lands). `LoadAndSave` is likely to be the most common processor type, but arbitrary processors are supported. `CompressedImageSaver` saves an `Image` in the Basis Universal format and configures the ImageLoader to load it as basis universal. The `AssetProcessor` will read this meta, run it through the LoadAndSave processor, and write the basis-universal version of the image to `.imported_assets`. The final metadata will look like this: ```rust ( meta_format_version: "1.0", processed_info: Some(( hash: 905599590923828066, full_hash: 9948823010183819117, process_dependencies: [], )), asset: Load( loader: "bevy_render::texture::image_loader::ImageLoader", settings: ( format: Format(Basis), ), ), ) ``` To try basis-universal processing out in Bevy examples, (for example `sprite.rs`), change `add_plugins(DefaultPlugins)` to `add_plugins(DefaultPlugins.set(AssetPlugin::processed_dev()))` and run with the `basis-universal` feature enabled: `cargo run --features=basis-universal --example sprite`. To create a custom processor, there are two main paths: 1. Use the `LoadAndSave` processor with an existing `AssetLoader`. Implement the `AssetSaver` trait, register the processor using `asset_processor.register_processor::<LoadAndSave<ImageLoader, CompressedImageSaver>>(image_saver.into())`. 2. Implement the `Process` trait directly and register it using: `asset_processor.register_processor(thing_processor)`. You can configure default processors for file extensions like this: ```rust asset_processor.set_default_processor::<ThingProcessor>("thing") ``` There is one more metadata type to be aware of: ```rust ( meta_format_version: "1.0", asset: Ignore, ) ``` This will ignore the asset during processing / prevent it from being written to `.imported_assets`. The AssetProcessor stores a transaction log at `.imported_assets/log` and uses it to gracefully recover from unexpected stops. This means you can force-quit the processor (and Bevy Apps running the processor in parallel) at arbitrary times! `.imported_assets` is "local state". It should _not_ be checked into source control. It should also be considered "read only". In practice, you _can_ modify processed assets and processed metadata if you really need to test something. But those modifications will not be represented in the hashes of the assets, so the processed state will be "out of sync" with the source assets. The processor _will not_ fix this for you. Either revert the change after you have tested it, or delete the processed files so they can be re-populated. ## Open Questions There are a number of open questions to be discussed. We should decide if they need to be addressed in this PR and if so, how we will address them: ### Implied Dependencies vs Dependency Enumeration There are currently two ways to populate asset dependencies: * **Implied via AssetLoaders**: if an AssetLoader loads an asset (and retrieves a handle), a dependency is added to the list. * **Explicit via the optional Asset::visit_dependencies**: if `server.load_asset(my_asset)` is called, it will call `my_asset.visit_dependencies`, which will grab dependencies that have been manually defined for the asset via the Asset trait impl (which can be derived). This means that defining explicit dependencies is optional for "loaded assets". And the list of dependencies is always accurate because loaders can only produce Handles if they register dependencies. If an asset was loaded with an AssetLoader, it only uses the implied dependencies. If an asset was created at runtime and added with `asset_server.load_asset(MyAsset)`, it will use `Asset::visit_dependencies`. However this can create a behavior mismatch between loaded assets and equivalent "created at runtime" assets if `Assets::visit_dependencies` doesn't exactly match the dependencies produced by the AssetLoader. This behavior mismatch can be resolved by completely removing "implied loader dependencies" and requiring `Asset::visit_dependencies` to supply dependency data. But this creates two problems: * It makes defining loaded assets harder and more error prone: Devs must remember to manually annotate asset dependencies with `#[dependency]` when deriving `Asset`. For more complicated assets (such as scenes), the derive likely wouldn't be sufficient and a manual `visit_dependencies` impl would be required. * Removes the ability to immediately kick off dependency loads: When AssetLoaders retrieve a Handle, they also immediately kick off an asset load for the handle, which means it can start loading in parallel _before_ the asset finishes loading. For large assets, this could be significant. (although this could be mitigated for processed assets if we store dependencies in the processed meta file and load them ahead of time) ### Eager ProcessorDev Asset Loading I made a controversial call in the interest of fast startup times ("time to first pixel") for the "processor dev mode configuration". When initializing the AssetProcessor, current processed versions of unchanged assets are yielded immediately, even if their dependencies haven't been checked yet for reprocessing. This means that non-current-state-of-filesystem-but-previously-valid assets might be returned to the App first, then hot-reloaded if/when their dependencies change and the asset is reprocessed. Is this behavior desirable? There is largely one alternative: do not yield an asset from the processor to the app until all of its dependencies have been checked for changes. In some common cases (load dependency has not changed since last run) this will increase startup time. The main question is "by how much" and is that slower startup time worth it in the interest of only yielding assets that are true to the current state of the filesystem. Should this be configurable? I'm starting to think we should only yield an asset after its (historical) dependencies have been checked for changes + processed as necessary, but I'm curious what you all think. ### Paths Are Currently The Only Canonical ID / Do We Want Asset UUIDs? In this implementation AssetPaths are the only canonical asset identifier (just like the previous Bevy Asset system and Godot). Moving assets will result in re-scans (and currently reprocessing, although reprocessing can easily be avoided with some changes). Asset renames/moves will break code and assets that rely on specific paths, unless those paths are fixed up. Do we want / need "stable asset uuids"? Introducing them is very possible: 1. Generate a UUID and include it in .meta files 2. Support UUID in AssetPath 3. Generate "asset indices" which are loaded on startup and map UUIDs to paths. 4 (maybe). Consider only supporting UUIDs for processed assets so we can generate quick-to-load indices instead of scanning meta files. The main "pro" is that assets referencing UUIDs don't need to be migrated when a path changes. The main "con" is that UUIDs cannot be "lazily resolved" like paths. They need a full view of all assets to answer the question "does this UUID exist". Which means UUIDs require the AssetProcessor to fully finish startup scans before saying an asset doesnt exist. And they essentially require asset pre-processing to use in apps, because scanning all asset metadata files at runtime to resolve a UUID is not viable for medium-to-large apps. It really requires a pre-generated UUID index, which must be loaded before querying for assets. I personally think this should be investigated in a separate PR. Paths aren't going anywhere ... _everyone_ uses filesystems (and filesystem-like apis) to manage their asset source files. I consider them permanent canonical asset information. Additionally, they behave well for both processed and unprocessed asset modes. Given that Bevy is supporting both, this feels like the right canonical ID to start with. UUIDS (and maybe even other indexed-identifier types) can be added later as necessary. ### Folder / File Naming Conventions All asset processing config currently lives in the `.imported_assets` folder. The processor transaction log is in `.imported_assets/log`. Processed assets are added to `.imported_assets/Default`, which will make migrating to processed asset profiles (ex: a `.imported_assets/Mobile` profile) a non-breaking change. It also allows us to create top-level files like `.imported_assets/log` without it being interpreted as an asset. Meta files currently have a `.meta` suffix. Do we like these names and conventions? ### Should the `AssetPlugin::processed_dev` configuration enable `watch_for_changes` automatically? Currently it does (which I think makes sense), but it does make it the only configuration that enables watch_for_changes by default. ### Discuss on_loaded High Level Interface: This PR includes a very rough "proof of concept" `on_loaded` system adapter that uses the `LoadedWithDependencies` event in combination with `asset_server.load_asset` dependency tracking to support this pattern ```rust fn main() { App::new() .init_asset::<MyAssets>() .add_systems(Update, on_loaded(create_array_texture)) .run(); } #[derive(Asset, Clone)] struct MyAssets { #[dependency] picture_of_my_cat: Handle<Image>, #[dependency] picture_of_my_other_cat: Handle<Image>, } impl FromWorld for ArrayTexture { fn from_world(world: &mut World) -> Self { picture_of_my_cat: server.load("meow.png"), picture_of_my_other_cat: server.load("meeeeeeeow.png"), } } fn spawn_cat(In(my_assets): In<MyAssets>, mut commands: Commands) { commands.spawn(SpriteBundle { texture: my_assets.picture_of_my_cat.clone(), ..default() }); commands.spawn(SpriteBundle { texture: my_assets.picture_of_my_other_cat.clone(), ..default() }); } ``` The implementation is _very_ rough. And it is currently unsafe because `bevy_ecs` doesn't expose some internals to do this safely from inside `bevy_asset`. There are plenty of unanswered questions like: * "do we add a Loadable" derive? (effectively automate the FromWorld implementation above) * Should `MyAssets` even be an Asset? (largely implemented this way because it elegantly builds on `server.load_asset(MyAsset { .. })` dependency tracking). We should think hard about what our ideal API looks like (and if this is a pattern we want to support). Not necessarily something we need to solve in this PR. The current `on_loaded` impl should probably be removed from this PR before merging. ## Clarifying Questions ### What about Assets as Entities? This Bevy Asset V2 proposal implementation initially stored Assets as ECS Entities. Instead of `AssetId<T>` + the `Assets<T>` resource it used `Entity` as the asset id and Asset values were just ECS components. There are plenty of compelling reasons to do this: 1. Easier to inline assets in Bevy Scenes (as they are "just" normal entities + components) 2. More flexible queries: use the power of the ECS to filter assets (ex: `Query<Mesh, With<Tree>>`). 3. Extensible. Users can add arbitrary component data to assets. 4. Things like "component visualization tools" work out of the box to visualize asset data. However Assets as Entities has a ton of caveats right now: * We need to be able to allocate entity ids without a direct World reference (aka rework id allocator in Entities ... i worked around this in my prototypes by just pre allocating big chunks of entities) * We want asset change events in addition to ECS change tracking ... how do we populate them when mutations can come from anywhere? Do we use Changed queries? This would require iterating over the change data for all assets every frame. Is this acceptable or should we implement a new "event based" component change detection option? * Reconciling manually created assets with asset-system managed assets has some nuance (ex: are they "loaded" / do they also have that component metadata?) * "how do we handle "static" / default entity handles" (ties in to the Entity Indices discussion: https://github.com/bevyengine/bevy/discussions/8319). This is necessary for things like "built in" assets and default handles in things like SpriteBundle. * Storing asset information as a component makes it easy to "invalidate" asset state by removing the component (or forcing modifications). Ideally we have ways to lock this down (some combination of Rust type privacy and ECS validation) In practice, how we store and identify assets is a reasonably superficial change (porting off of Assets as Entities and implementing dedicated storage + ids took less than a day). So once we sort out the remaining challenges the flip should be straightforward. Additionally, I do still have "Assets as Entities" in my commit history, so we can reuse that work. I personally think "assets as entities" is a good endgame, but it also doesn't provide _significant_ value at the moment and it certainly isn't ready yet with the current state of things. ### Why not Distill? [Distill](https://github.com/amethyst/distill) is a high quality fully featured asset system built in Rust. It is very natural to ask "why not just use Distill?". It is also worth calling out that for awhile, [we planned on adopting Distill / I signed off on it](https://github.com/bevyengine/bevy/issues/708). However I think Bevy has a number of constraints that make Distill adoption suboptimal: * **Architectural Simplicity:** * Distill's processor requires an in-memory database (lmdb) and RPC networked API (using Cap'n Proto). Each of these introduces API complexity that increases maintenance burden and "code grokability". Ignoring tests, documentation, and examples, Distill has 24,237 lines of Rust code (including generated code for RPC + database interactions). If you ignore generated code, it has 11,499 lines. * Bevy builds the AssetProcessor and AssetServer using pluggable AssetReader/AssetWriter Rust traits with simple io interfaces. They do not necessitate databases or RPC interfaces (although Readers/Writers could use them if that is desired). Bevy Asset V2 (at the time of writing this PR) is 5,384 lines of Rust code (ignoring tests, documentation, and examples). Grain of salt: Distill does have more features currently (ex: Asset Packing, GUIDS, remote-out-of-process asset processor). I do plan to implement these features in Bevy Asset V2 and I personally highly doubt they will meaningfully close the 6115 lines-of-code gap. * This complexity gap (which while illustrated by lines of code, is much bigger than just that) is noteworthy to me. Bevy should be hackable and there are pillars of Distill that are very hard to understand and extend. This is a matter of opinion (and Bevy Asset V2 also has complicated areas), but I think Bevy Asset V2 is much more approachable for the average developer. * Necessary disclaimer: counting lines of code is an extremely rough complexity metric. Read the code and form your own opinions. * **Optional Asset Processing:** Not all Bevy Apps (or Bevy App developers) need / want asset preprocessing. Processing increases the complexity of the development environment by introducing things like meta files, imported asset storage, running processors in the background, waiting for processing to finish, etc. Distill _requires_ preprocessing to work. With Bevy Asset V2 processing is fully opt-in. The AssetServer isn't directly aware of asset processors at all. AssetLoaders only care about converting bytes to runtime Assets ... they don't know or care if the bytes were pre-processed or not. Processing is "elegantly" (forgive my self-congratulatory phrasing) layered on top and builds on the existing Asset system primitives. * **Direct Filesystem Access to Processed Asset State:** Distill stores processed assets in a database. This makes debugging / inspecting the processed outputs harder (either requires special tooling to query the database or they need to be "deployed" to be inspected). Bevy Asset V2, on the other hand, stores processed assets in the filesystem (by default ... this is configurable). This makes interacting with the processed state more natural. Note that both Godot and Unity's new asset system store processed assets in the filesystem. * **Portability**: Because Distill's processor uses lmdb and RPC networking, it cannot be run on certain platforms (ex: lmdb is a non-rust dependency that cannot run on the web, some platforms don't support running network servers). Bevy should be able to process assets everywhere (ex: run the Bevy Editor on the web, compile + process shaders on mobile, etc). Distill does partially mitigate this problem by supporting "streaming" assets via the RPC protocol, but this is not a full solve from my perspective. And Bevy Asset V2 can (in theory) also stream assets (without requiring RPC, although this isn't implemented yet) Note that I _do_ still think Distill would be a solid asset system for Bevy. But I think the approach in this PR is a better solve for Bevy's specific "asset system requirements". ### Doesn't async-fs just shim requests to "sync" `std::fs`? What is the point? "True async file io" has limited / spotty platform support. async-fs (and the rust async ecosystem generally ... ex Tokio) currently use async wrappers over std::fs that offload blocking requests to separate threads. This may feel unsatisfying, but it _does_ still provide value because it prevents our task pools from blocking on file system operations (which would prevent progress when there are many tasks to do, but all threads in a pool are currently blocking on file system ops). Additionally, using async APIs for our AssetReaders and AssetWriters also provides value because we can later add support for "true async file io" for platforms that support it. _And_ we can implement other "true async io" asset backends (such as networked asset io). ## Draft TODO - [x] Fill in missing filesystem event APIs: file removed event (which is expressed as dangling RenameFrom events in some cases), file/folder renamed event - [x] Assets without loaders are not moved to the processed folder. This breaks things like referenced `.bin` files for GLTFs. This should be configurable per-non-asset-type. - [x] Initial implementation of Reflect and FromReflect for Handle. The "deserialization" parity bar is low here as this only worked with static UUIDs in the old impl ... this is a non-trivial problem. Either we add a Handle::AssetPath variant that gets "upgraded" to a strong handle on scene load or we use a separate AssetRef type for Bevy scenes (which is converted to a runtime Handle on load). This deserves its own discussion in a different pr. - [x] Populate read_asset_bytes hash when run by the processor (a bit of a special case .. when run by the processor the processed meta will contain the hash so we don't need to compute it on the spot, but we don't want/need to read the meta when run by the main AssetServer) - [x] Delay hot reloading: currently filesystem events are handled immediately, which creates timing issues in some cases. For example hot reloading images can sometimes break because the image isn't finished writing. We should add a delay, likely similar to the [implementation in this PR](https://github.com/bevyengine/bevy/pull/8503). - [x] Port old platform-specific AssetIo implementations to the new AssetReader interface (currently missing Android and web) - [x] Resolve on_loaded unsafety (either by removing the API entirely or removing the unsafe) - [x] Runtime loader setting overrides - [x] Remove remaining unwraps that should be error-handled. There are number of TODOs here - [x] Pretty AssetPath Display impl - [x] Document more APIs - [x] Resolve spurious "reloading because it has changed" events (to repro run load_gltf with `processed_dev()`) - [x] load_dependency hot reloading currently only works for processed assets. If processing is disabled, load_dependency changes are not hot reloaded. - [x] Replace AssetInfo dependency load/fail counters with `loading_dependencies: HashSet<UntypedAssetId>` to prevent reloads from (potentially) breaking counters. Storing this will also enable "dependency reloaded" events (see [Next Steps](#next-steps)) - [x] Re-add filesystem watcher cargo feature gate (currently it is not optional) - [ ] Migration Guide - [ ] Changelog ## Followup TODO - [ ] Replace "eager unchanged processed asset loading" behavior with "don't returned unchanged processed asset until dependencies have been checked". - [ ] Add true `Ignore` AssetAction that does not copy the asset to the imported_assets folder. - [ ] Finish "live asset unloading" (ex: free up CPU asset memory after uploading an image to the GPU), rethink RenderAssets, and port renderer features. The `Assets` collection uses `Option<T>` for asset storage to support its removal. (1) the Option might not actually be necessary ... might be able to just remove from the collection entirely (2) need to finalize removal apis - [ ] Try replacing the "channel based" asset id recycling with something a bit more efficient (ex: we might be able to use raw atomic ints with some cleverness) - [ ] Consider adding UUIDs to processed assets (scoped just to helping identify moved assets ... not exposed to load queries ... see [Next Steps](#next-steps)) - [ ] Store "last modified" source asset and meta timestamps in processed meta files to enable skipping expensive hashing when the file wasn't changed - [ ] Fix "slow loop" handle drop fix - [ ] Migrate to TypeName - [x] Handle "loader preregistration". See #9429 ## Next Steps * **Configurable per-type defaults for AssetMeta**: It should be possible to add configuration like "all png image meta should default to using nearest sampling" (currently this hard-coded per-loader/processor Settings::default() impls). Also see the "Folder Meta" bullet point. * **Avoid Reprocessing on Asset Renames / Moves**: See the "canonical asset ids" discussion in [Open Questions](#open-questions) and the relevant bullet point in [Draft TODO](#draft-todo). Even without canonical ids, folder renames could avoid reprocessing in some cases. * **Multiple Asset Sources**: Expand AssetPath to support "asset source names" and support multiple AssetReaders in the asset server (ex: `webserver://some_path/image.png` backed by an Http webserver AssetReader). The "default" asset reader would use normal `some_path/image.png` paths. Ideally this works in combination with multiple AssetWatchers for hot-reloading * **Stable Type Names**: this pr removes the TypeUuid requirement from assets in favor of `std::any::type_name`. This makes defining assets easier (no need to generate a new uuid / use weird proc macro syntax). It also makes reading meta files easier (because things have "friendly names"). We also use type names for components in scene files. If they are good enough for components, they are good enough for assets. And consistency across Bevy pillars is desirable. However, `std::any::type_name` is not guaranteed to be stable (although in practice it is). We've developed a [stable type path](https://github.com/bevyengine/bevy/pull/7184) to resolve this, which should be adopted when it is ready. * **Command Line Interface**: It should be possible to run the asset processor in a separate process from the command line. This will also require building a network-server-backed AssetReader to communicate between the app and the processor. We've been planning to build a "bevy cli" for awhile. This seems like a good excuse to build it. * **Asset Packing**: This is largely an additive feature, so it made sense to me to punt this until we've laid the foundations in this PR. * **Per-Platform Processed Assets**: It should be possible to generate assets for multiple platforms by supporting multiple "processor profiles" per asset (ex: compress with format X on PC and Y on iOS). I think there should probably be arbitrary "profiles" (which can be separate from actual platforms), which are then assigned to a given platform when generating the final asset distribution for that platform. Ex: maybe devs want a "Mobile" profile that is shared between iOS and Android. Or a "LowEnd" profile shared between web and mobile. * **Versioning and Migrations**: Assets, Loaders, Savers, and Processors need to have versions to determine if their schema is valid. If an asset / loader version is incompatible with the current version expected at runtime, the processor should be able to migrate them. I think we should try using Bevy Reflect for this, as it would allow us to load the old version as a dynamic Reflect type without actually having the old Rust type. It would also allow us to define "patches" to migrate between versions (Bevy Reflect devs are currently working on patching). The `.meta` file already has its own format version. Migrating that to new versions should also be possible. * **Real Copy-on-write AssetPaths**: Rust's actual Cow (clone-on-write type) currently used by AssetPath can still result in String clones that aren't actually necessary (cloning an Owned Cow clones the contents). Bevy's asset system requires cloning AssetPaths in a number of places, which result in actual clones of the internal Strings. This is not efficient. AssetPath internals should be reworked to exhibit truer cow-like-behavior that reduces String clones to the absolute minimum. * **Consider processor-less processing**: In theory the AssetServer could run processors "inline" even if the background AssetProcessor is disabled. If we decide this is actually desirable, we could add this. But I don't think its a priority in the short or medium term. * **Pre-emptive dependency loading**: We could encode dependencies in processed meta files, which could then be used by the Asset Server to kick of dependency loads as early as possible (prior to starting the actual asset load). Is this desirable? How much time would this save in practice? * **Optimize Processor With UntypedAssetIds**: The processor exclusively uses AssetPath to identify assets currently. It might be possible to swap these out for UntypedAssetIds in some places, which are smaller / cheaper to hash and compare. * **One to Many Asset Processing**: An asset source file that produces many assets currently must be processed into a single "processed" asset source. If labeled assets can be written separately they can each have their own configured savers _and_ they could be loaded more granularly. Definitely worth exploring! * **Automatically Track "Runtime-only" Asset Dependencies**: Right now, tracking "created at runtime" asset dependencies requires adding them via `asset_server.load_asset(StandardMaterial::default())`. I think with some cleverness we could also do this for `materials.add(StandardMaterial::default())`, making tracking work "everywhere". There are challenges here relating to change detection / ensuring the server is made aware of dependency changes. This could be expensive in some cases. * **"Dependency Changed" events**: Some assets have runtime artifacts that need to be re-generated when one of their dependencies change (ex: regenerate a material's bind group when a Texture needs to change). We are generating the dependency graph so we can definitely produce these events. Buuuuut generating these events will have a cost / they could be high frequency for some assets, so we might want this to be opt-in for specific cases. * **Investigate Storing More Information In Handles**: Handles can now store arbitrary information, which makes it cheaper and easier to access. How much should we move into them? Canonical asset load states (via atomics)? (`handle.is_loaded()` would be very cool). Should we store the entire asset and remove the `Assets<T>` collection? (`Arc<RwLock<Option<Image>>>`?) * **Support processing and loading files without extensions**: This is a pretty arbitrary restriction and could be supported with very minimal changes. * **Folder Meta**: It would be nice if we could define per folder processor configuration defaults (likely in a `.meta` or `.folder_meta` file). Things like "default to linear filtering for all Images in this folder". * **Replace async_broadcast with event-listener?** This might be approximately drop-in for some uses and it feels more light weight * **Support Running the AssetProcessor on the Web**: Most of the hard work is done here, but there are some easy straggling TODOs (make the transaction log an interface instead of a direct file writer so we can write a web storage backend, implement an AssetReader/AssetWriter that reads/writes to something like LocalStorage). * **Consider identifying and preventing circular dependencies**: This is especially important for "processor dependencies", as processing will silently never finish in these cases. * **Built-in/Inlined Asset Hot Reloading**: This PR regresses "built-in/inlined" asset hot reloading (previously provided by the DebugAssetServer). I'm intentionally punting this because I think it can be cleanly implemented with "multiple asset sources" by registering a "debug asset source" (ex: `debug://bevy_pbr/src/render/pbr.wgsl` asset paths) in combination with an AssetWatcher for that asset source and support for "manually loading pats with asset bytes instead of AssetReaders". The old DebugAssetServer was quite nasty and I'd love to avoid that hackery going forward. * **Investigate ways to remove double-parsing meta files**: Parsing meta files currently involves parsing once with "minimal" versions of the meta file to extract the type name of the loader/processor config, then parsing again to parse the "full" meta. This is suboptimal. We should be able to define custom deserializers that (1) assume the loader/processor type name comes first (2) dynamically looks up the loader/processor registrations to deserialize settings in-line (similar to components in the bevy scene format). Another alternative: deserialize as dynamic Reflect objects and then convert. * **More runtime loading configuration**: Support using the Handle type as a hint to select an asset loader (instead of relying on AssetPath extensions) * **More high level Processor trait implementations**: For example, it might be worth adding support for arbitrary chains of "asset transforms" that modify an in-memory asset representation between loading and saving. (ex: load a Mesh, run a `subdivide_mesh` transform, followed by a `flip_normals` transform, then save the mesh to an efficient compressed format). * **Bevy Scene Handle Deserialization**: (see the relevant [Draft TODO item](#draft-todo) for context) * **Explore High Level Load Interfaces**: See [this discussion](#discuss-on_loaded-high-level-interface) for one prototype. * **Asset Streaming**: It would be great if we could stream Assets (ex: stream a long video file piece by piece) * **ID Exchanging**: In this PR Asset Handles/AssetIds are bigger than they need to be because they have a Uuid enum variant. If we implement an "id exchanging" system that trades Uuids for "efficient runtime ids", we can cut down on the size of AssetIds, making them more efficient. This has some open design questions, such as how to spawn entities with "default" handle values (as these wouldn't have access to the exchange api in the current system). * **Asset Path Fixup Tooling**: Assets that inline asset paths inside them will break when an asset moves. The asset system provides the functionality to detect when paths break. We should build a framework that enables formats to define "path migrations". This is especially important for scene files. For editor-generated files, we should also consider using UUIDs (see other bullet point) to avoid the need to migrate in these cases. --------- Co-authored-by: BeastLe9enD <beastle9end@outlook.de> Co-authored-by: Mike <mike.hsu@gmail.com> Co-authored-by: Nicola Papale <nicopap@users.noreply.github.com> |
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James O'Brien
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4f1d9a6315
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Reorder render sets, refactor bevy_sprite to take advantage (#9236)
This is a continuation of this PR: #8062 # Objective - Reorder render schedule sets to allow data preparation when phase item order is known to support improved batching - Part of the batching/instancing etc plan from here: https://github.com/bevyengine/bevy/issues/89#issuecomment-1379249074 - The original idea came from @inodentry and proved to be a good one. Thanks! - Refactor `bevy_sprite` and `bevy_ui` to take advantage of the new ordering ## Solution - Move `Prepare` and `PrepareFlush` after `PhaseSortFlush` - Add a `PrepareAssets` set that runs in parallel with other systems and sets in the render schedule. - Put prepare_assets systems in the `PrepareAssets` set - If explicit dependencies are needed on Mesh or Material RenderAssets then depend on the appropriate system. - Add `ManageViews` and `ManageViewsFlush` sets between `ExtractCommands` and Queue - Move `queue_mesh*_bind_group` to the Prepare stage - Rename them to `prepare_` - Put systems that prepare resources (buffers, textures, etc.) into a `PrepareResources` set inside `Prepare` - Put the `prepare_..._bind_group` systems into a `PrepareBindGroup` set after `PrepareResources` - Move `prepare_lights` to the `ManageViews` set - `prepare_lights` creates views and this must happen before `Queue` - This system needs refactoring to stop handling all responsibilities - Gather lights, sort, and create shadow map views. Store sorted light entities in a resource - Remove `BatchedPhaseItem` - Replace `batch_range` with `batch_size` representing how many items to skip after rendering the item or to skip the item entirely if `batch_size` is 0. - `queue_sprites` has been split into `queue_sprites` for queueing phase items and `prepare_sprites` for batching after the `PhaseSort` - `PhaseItem`s are still inserted in `queue_sprites` - After sorting adjacent compatible sprite phase items are accumulated into `SpriteBatch` components on the first entity of each batch, containing a range of vertex indices. The associated `PhaseItem`'s `batch_size` is updated appropriately. - `SpriteBatch` items are then drawn skipping over the other items in the batch based on the value in `batch_size` - A very similar refactor was performed on `bevy_ui` --- ## Changelog Changed: - Reordered and reworked render app schedule sets. The main change is that data is extracted, queued, sorted, and then prepared when the order of data is known. - Refactor `bevy_sprite` and `bevy_ui` to take advantage of the reordering. ## Migration Guide - Assets such as materials and meshes should now be created in `PrepareAssets` e.g. `prepare_assets<Mesh>` - Queueing entities to `RenderPhase`s continues to be done in `Queue` e.g. `queue_sprites` - Preparing resources (textures, buffers, etc.) should now be done in `PrepareResources`, e.g. `prepare_prepass_textures`, `prepare_mesh_uniforms` - Prepare bind groups should now be done in `PrepareBindGroups` e.g. `prepare_mesh_bind_group` - Any batching or instancing can now be done in `Prepare` where the order of the phase items is known e.g. `prepare_sprites` ## Next Steps - Introduce some generic mechanism to ensure items that can be batched are grouped in the phase item order, currently you could easily have `[sprite at z 0, mesh at z 0, sprite at z 0]` preventing batching. - Investigate improved orderings for building the MeshUniform buffer - Implementing batching across the rest of bevy --------- Co-authored-by: Robert Swain <robert.swain@gmail.com> Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com> |
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Rob Parrett
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a788e31ad5
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Fix CI for Rust 1.72 (#9562)
# Objective [Rust 1.72.0](https://blog.rust-lang.org/2023/08/24/Rust-1.72.0.html) is now stable. # Notes - `let-else` formatting has arrived! - I chose to allow `explicit_iter_loop` due to https://github.com/rust-lang/rust-clippy/issues/11074. We didn't hit any of the false positives that prevent compilation, but fixing this did produce a lot of the "symbol soup" mentioned, e.g. `for image in &mut *image_events {`. Happy to undo this if there's consensus the other way. --------- Co-authored-by: François <mockersf@gmail.com> |
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Robert Swain
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0a11af9375
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Reduce the size of MeshUniform to improve performance (#9416)
# Objective - Significantly reduce the size of MeshUniform by only including necessary data. ## Solution Local to world, model transforms are affine. This means they only need a 4x3 matrix to represent them. `MeshUniform` stores the current, and previous model transforms, and the inverse transpose of the current model transform, all as 4x4 matrices. Instead we can store the current, and previous model transforms as 4x3 matrices, and we only need the upper-left 3x3 part of the inverse transpose of the current model transform. This change allows us to reduce the serialized MeshUniform size from 208 bytes to 144 bytes, which is over a 30% saving in data to serialize, and VRAM bandwidth and space. ## Benchmarks On an M1 Max, running `many_cubes -- sphere`, main is in yellow, this PR is in red: <img width="1484" alt="Screenshot 2023-08-11 at 02 36 43" src="https://github.com/bevyengine/bevy/assets/302146/7d99c7b3-f2bb-4004-a8d0-4c00f755cb0d"> A reduction in frame time of ~14%. --- ## Changelog - Changed: Redefined `MeshUniform` to improve performance by using 4x3 affine transforms and reconstructing 4x4 matrices in the shader. Helper functions were added to `bevy_pbr::mesh_functions` to unpack the data. `affine_to_square` converts the packed 4x3 in 3x4 matrix data to a 4x4 matrix. `mat2x4_f32_to_mat3x3` converts the 3x3 in mat2x4 + f32 matrix data back into a 3x3. ## Migration Guide Shader code before: ``` var model = mesh[instance_index].model; ``` Shader code after: ``` #import bevy_pbr::mesh_functions affine_to_square var model = affine_to_square(mesh[instance_index].model); ``` |
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Ame :]
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06f7f9640a
|
Use bevy crates imports instead of bevy internal. post_processing example (#9396)
# Objective - I want to run the post_processing example in a new project, but I can't because it uses bevy internal imports. ## Solution - Change the bevy_internal imports to their respective bevy crates imports |
||
Dimitri Belopopsky
|
b8695d06b1
|
Fix non-visible motion vector text in shader prepass example (#9155)
# Objective
In the shader prepass example, changing to the motion vector output
hides the text, because both it and the background are rendererd black.
Seems to have been caused by this commit?
|
||
|
IceSentry
|
171ff1b1e1
|
use ViewNodeRunner in the post_processing example (#9127)
# Objective - I forgot to update the example after the `ViewNodeRunner` was merged. It was even partially mentioned in one of the comments. ## Solution - Use the `ViewNodeRunner` in the post_processing example - I also broke up a few lines that were a bit long --------- Co-authored-by: JMS55 <47158642+JMS55@users.noreply.github.com> |
||
|
Rob Parrett
|
e1e2407091
|
Fix post_processing example on webgl2 (#9361)
# Objective
The `post_processing` example is currently broken when run with webgl2.
```
cargo run --example post_processing --target=wasm32-unknown-unknown
```
```
wasm.js:387 panicked at 'wgpu error: Validation Error
Caused by:
In Device::create_render_pipeline
note: label = `post_process_pipeline`
In the provided shader, the type given for group 0 binding 2 has a size of 4. As the device does not support `DownlevelFlags::BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED`, the type must have a size that is a multiple of 16 bytes.
```
I bisected the breakage to
|
||
Paul Buehne
|
0566e73af4
|
Fixed typo in line 322 (#9276)
`trait` was spelled `trai` and used singular instead of plural in documenting comment. |
||
ClayenKitten
|
ffc572728f
|
Fix typos throughout the project (#9090)
# Objective
Fix typos throughout the project.
## Solution
[`typos`](https://github.com/crate-ci/typos) project was used for
scanning, but no automatic corrections were applied. I checked
everything by hand before fixing.
Most of the changes are documentation/comments corrections. Also, there
are few trivial changes to code (variable name, pub(crate) function name
and a few error/panic messages).
## Unsolved
`bevy_reflect_derive` has
[typo](
|
||
|
robtfm
|
10f5c92068
|
improve shader import model (#5703)
# Objective operate on naga IR directly to improve handling of shader modules. - give codespan reporting into imported modules - allow glsl to be used from wgsl and vice-versa the ultimate objective is to make it possible to - provide user hooks for core shader functions (to modify light behaviour within the standard pbr pipeline, for example) - make automatic binding slot allocation possible but ... since this is already big, adds some value and (i think) is at feature parity with the existing code, i wanted to push this now. ## Solution i made a crate called naga_oil (https://github.com/robtfm/naga_oil - unpublished for now, could be part of bevy) which manages modules by - building each module independantly to naga IR - creating "header" files for each supported language, which are used to build dependent modules/shaders - make final shaders by combining the shader IR with the IR for imported modules then integrated this into bevy, replacing some of the existing shader processing stuff. also reworked examples to reflect this. ## Migration Guide shaders that don't use `#import` directives should work without changes. the most notable user-facing difference is that imported functions/variables/etc need to be qualified at point of use, and there's no "leakage" of visible stuff into your shader scope from the imports of your imports, so if you used things imported by your imports, you now need to import them directly and qualify them. the current strategy of including/'spreading' `mesh_vertex_output` directly into a struct doesn't work any more, so these need to be modified as per the examples (e.g. color_material.wgsl, or many others). mesh data is assumed to be in bindgroup 2 by default, if mesh data is bound into bindgroup 1 instead then the shader def `MESH_BINDGROUP_1` needs to be added to the pipeline shader_defs. |
||
Edgar Geier
|
f18f28874a
|
Allow tuples and single plugins in add_plugins, deprecate add_plugin (#8097)
# Objective - Better consistency with `add_systems`. - Deprecating `add_plugin` in favor of a more powerful `add_plugins`. - Allow passing `Plugin` to `add_plugins`. - Allow passing tuples to `add_plugins`. ## Solution - `App::add_plugins` now takes an `impl Plugins` parameter. - `App::add_plugin` is deprecated. - `Plugins` is a new sealed trait that is only implemented for `Plugin`, `PluginGroup` and tuples over `Plugins`. - All examples, benchmarks and tests are changed to use `add_plugins`, using tuples where appropriate. --- ## Changelog ### Changed - `App::add_plugins` now accepts all types that implement `Plugins`, which is implemented for: - Types that implement `Plugin`. - Types that implement `PluginGroup`. - Tuples (up to 16 elements) over types that implement `Plugins`. - Deprecated `App::add_plugin` in favor of `App::add_plugins`. ## Migration Guide - Replace `app.add_plugin(plugin)` calls with `app.add_plugins(plugin)`. --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
||
Duncan
|
64405469a5
|
Expand FallbackImage to include a GpuImage for each possible TextureViewDimension (#6974)
# Objective Fixes #6920 ## Solution From the issue discussion: > From looking at the `AsBindGroup` derive macro implementation, the fallback image's `TextureView` is used when the binding's `Option<Handle<Image>>` is `None`. Because this relies on already having a view that matches the desired binding dimensions, I think the solution will require creating a separate `GpuImage` for each possible `TextureViewDimension`. --- ## Changelog Users can now rely on `FallbackImage` to work with a texture binding of any dimension. |
||
radiish
|
1efc762924
|
reflect: stable type path v2 (#7184)
# Objective
- Introduce a stable alternative to
[`std::any::type_name`](https://doc.rust-lang.org/std/any/fn.type_name.html).
- Rewrite of #5805 with heavy inspiration in design.
- On the path to #5830.
- Part of solving #3327.
## Solution
- Add a `TypePath` trait for static stable type path/name information.
- Add a `TypePath` derive macro.
- Add a `impl_type_path` macro for implementing internal and foreign
types in `bevy_reflect`.
---
## Changelog
- Added `TypePath` trait.
- Added `DynamicTypePath` trait and `get_type_path` method to `Reflect`.
- Added a `TypePath` derive macro.
- Added a `bevy_reflect::impl_type_path` for implementing `TypePath` on
internal and foreign types in `bevy_reflect`.
- Changed `bevy_reflect::utility::(Non)GenericTypeInfoCell` to
`(Non)GenericTypedCell<T>` which allows us to be generic over both
`TypeInfo` and `TypePath`.
- `TypePath` is now a supertrait of `Asset`, `Material` and
`Material2d`.
- `impl_reflect_struct` needs a `#[type_path = "..."]` attribute to be
specified.
- `impl_reflect_value` needs to either specify path starting with a
double colon (`::core::option::Option`) or an `in my_crate::foo`
declaration.
- Added `bevy_reflect_derive::ReflectTypePath`.
- Most uses of `Ident` in `bevy_reflect_derive` changed to use
`ReflectTypePath`.
## Migration Guide
- Implementors of `Asset`, `Material` and `Material2d` now also need to
derive `TypePath`.
- Manual implementors of `Reflect` will need to implement the new
`get_type_path` method.
## Open Questions
- [x] ~This PR currently does not migrate any usages of
`std::any::type_name` to use `bevy_reflect::TypePath` to ease the review
process. Should it?~ Migration will be left to a follow-up PR.
- [ ] This PR adds a lot of `#[derive(TypePath)]` and `T: TypePath` to
satisfy new bounds, mostly when deriving `TypeUuid`. Should we make
`TypePath` a supertrait of `TypeUuid`? [Should we remove `TypeUuid` in
favour of
`TypePath`?](
|
||
François
|
27e1cf92ad
|
shader_prepass example: disable MSAA for maximum compatibility (#8504)
# Objective
Since #8446, example `shader_prepass` logs the following error on my mac
m1:
```
ERROR bevy_render::render_resource::pipeline_cache: failed to process shader:
error: Entry point fragment at Fragment is invalid
= Argument 1 varying error
= Capability MULTISAMPLED_SHADING is not supported
```
The example display the 3d scene but doesn't change with the preps
selected
Maybe related to this update in naga:
|
||
|
François
|
e0b18091b5
|
fix missed examples in WebGPU update (#8553)
# Objective - I missed a few examples in #8336 - fixes #8556 - fixes #8620 ## Solution - Update them |
||
JMS55
|
17f045e2a0
|
Delay asset hot reloading (#8503)
# Objective - Fix #5631 ## Solution - Wait 50ms (configurable) after the last modification event before reloading an asset. --- ## Changelog - `AssetPlugin::watch_for_changes` is now a `ChangeWatcher` instead of a `bool` - Fixed https://github.com/bevyengine/bevy/issues/5631 ## Migration Guide - Replace `AssetPlugin::watch_for_changes: true` with e.g. `ChangeWatcher::with_delay(Duration::from_millis(200))` --------- Co-authored-by: François <mockersf@gmail.com> |
||
|
François
|
71842c5ac9
|
Webgpu support (#8336)
# Objective - Support WebGPU - alternative to #5027 that doesn't need any async / await - fixes #8315 - Surprise fix #7318 ## Solution ### For async renderer initialisation - Update the plugin lifecycle: - app builds the plugin - calls `plugin.build` - registers the plugin - app starts the event loop - event loop waits for `ready` of all registered plugins in the same order - returns `true` by default - then call all `finish` then all `cleanup` in the same order as registered - then execute the schedule In the case of the renderer, to avoid anything async: - building the renderer plugin creates a detached task that will send back the initialised renderer through a mutex in a resource - `ready` will wait for the renderer to be present in the resource - `finish` will take that renderer and place it in the expected resources by other plugins - other plugins (that expect the renderer to be available) `finish` are called and they are able to set up their pipelines - `cleanup` is called, only custom one is still for pipeline rendering ### For WebGPU support - update the `build-wasm-example` script to support passing `--api webgpu` that will build the example with WebGPU support - feature for webgl2 was always enabled when building for wasm. it's now in the default feature list and enabled on all platforms, so check for this feature must also check that the target_arch is `wasm32` --- ## Migration Guide - `Plugin::setup` has been renamed `Plugin::cleanup` - `Plugin::finish` has been added, and plugins adding pipelines should do it in this function instead of `Plugin::build` ```rust // Before impl Plugin for MyPlugin { fn build(&self, app: &mut App) { app.insert_resource::<MyResource> .add_systems(Update, my_system); let render_app = match app.get_sub_app_mut(RenderApp) { Ok(render_app) => render_app, Err(_) => return, }; render_app .init_resource::<RenderResourceNeedingDevice>() .init_resource::<OtherRenderResource>(); } } // After impl Plugin for MyPlugin { fn build(&self, app: &mut App) { app.insert_resource::<MyResource> .add_systems(Update, my_system); let render_app = match app.get_sub_app_mut(RenderApp) { Ok(render_app) => render_app, Err(_) => return, }; render_app .init_resource::<OtherRenderResource>(); } fn finish(&self, app: &mut App) { let render_app = match app.get_sub_app_mut(RenderApp) { Ok(render_app) => render_app, Err(_) => return, }; render_app .init_resource::<RenderResourceNeedingDevice>(); } } ``` |
||
|
IceSentry
|
3f6367d584
|
Handle vertex_uvs if they are present in default prepass fragment shader (#8330)
# Objective - Enabling AlphaMode::Opaque in the shader_prepass example crashes. The issue seems to be that enabling opaque also generates vertex_uvs Fixes https://github.com/bevyengine/bevy/issues/8273 ## Solution - Use the vertex_uvs in the shader if they are present |
||
ira
|
6b774c0fda
|
Compute vertex_count for indexed meshes on GpuMesh (#8460)
# Objective Compute the `vertex_count` for indexed meshes as well as non-indexed meshes. I will need this in a future PR based on #8427 that adds a gizmo component that draws the normals of a mesh when attached to an entity ([branch](https://github.com/devil-ira/bevy/compare/instanced-line-rendering...devil-ira:bevy:instanced-line-rendering-normals)). <details><summary>Example image</summary> <p>  </p> </details> ## Solution Move `vertex_count` field from `GpuBufferInfo::NonIndexed` to `GpuMesh` ## Migration Guide `vertex_count` is now stored directly on `GpuMesh` instead of `GpuBufferInfo::NonIndexed`. |
||
|
François
|
e0e5f3acd4
|
add a default font (#8445)
# Objective - Have a default font ## Solution - Add a font based on FiraMono containing only ASCII characters and use it as the default font - It is behind a feature `default_font` enabled by default - I also updated examples to use it, but not UI examples to still show how to use a custom font --- ## Changelog * If you display text without using the default handle provided by `TextStyle`, the text will be displayed |
||
|
IceSentry
|
c7eaedd6a1
|
Remove old post_processing example (#8376)
# Objective - The old post processing example doesn't use the actual post processing features of bevy. It also has some issues with resizing. It's also causing some confusion for people because accessing the prepass textures from it is not easy. - There's already a render to texture example - At this point, it's mostly obsolete since the post_process_pass example is more complete and shows the recommended way to do post processing in bevy. It's a bit more complicated, but it's well documented and I'm working on simplifying it even more ## Solution - Remove the old post_processing example - Rename post_process_pass to post_processing ## Reviewer Notes The diff is really noisy because of the rename, but I didn't change any code in the example. --------- Co-authored-by: James Liu <contact@jamessliu.com> |
||
|
IceSentry
|
614de3019c
|
Add RenderGraphApp to simplify adding render nodes (#8007)
# Objective - Adding a node to the render_graph can be quite verbose and error prone because there's a lot of moving parts to it. ## Solution - Encapsulate this in a simple utility method - Mostly intended for optional nodes that have specific ordering - Requires that the `Node` impl `FromWorld`, but every internal node is built using a new function taking a `&mut World` so it was essentially already `FromWorld` - Use it for the bloom, fxaa and taa, nodes. - The main nodes don't use it because they rely more on the order of many nodes being added --- ## Changelog - Impl `FromWorld` for `BloomNode`, `FxaaNode` and `TaaNode` - Added `RenderGraph::add_node_edges()` - Added `RenderGraph::sub_graph()` - Added `RenderGraph::sub_graph_mut()` - Added `RenderGraphApp`, `RenderGraphApp::add_render_graph_node`, `RenderGraphApp::add_render_graph_edges`, `RenderGraphApp::add_render_graph_edge` ## Notes ~~This was taken out of https://github.com/bevyengine/bevy/pull/7995 because it works on it's own. Once the linked PR is done, the new `add_node()` will be simplified a bit since the input/output params won't be necessary.~~ This feature will be useful in most of the upcoming render nodes so it's impact will be more relevant at that point. Partially fixes #7985 ## Future work * Add a way to automatically label nodes or at least make it part of the trait. This would remove one more field from the functions added in this PR * Use it in the main pass 2d/3d --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
||
|
JMS55
|
53667dea56
|
Temporal Antialiasing (TAA) (#7291)
 # Objective - Implement an alternative antialias technique - TAA scales based off of view resolution, not geometry complexity - TAA filters textures, firefly pixels, and other aliasing not covered by MSAA - TAA additionally will reduce noise / increase quality in future stochastic rendering techniques - Closes https://github.com/bevyengine/bevy/issues/3663 ## Solution - Add a temporal jitter component - Add a motion vector prepass - Add a TemporalAntialias component and plugin - Combine existing MSAA and FXAA examples and add TAA ## Followup Work - Prepass motion vector support for skinned meshes - Move uniforms needed for motion vectors into a separate bind group, instead of using different bind group layouts - Reuse previous frame's GPU view buffer for motion vectors, instead of recomputing - Mip biasing for sharper textures, and or unjitter texture UVs https://github.com/bevyengine/bevy/issues/7323 - Compute shader for better performance - Investigate FSR techniques - Historical depth based disocclusion tests, for geometry disocclusion - Historical luminance/hue based tests, for shading disocclusion - Pixel "locks" to reduce blending rate / revamp history confidence mechanism - Orthographic camera support for TemporalJitter - Figure out COD's 1-tap bicubic filter --- ## Changelog - Added MotionVectorPrepass and TemporalJitter - Added TemporalAntialiasPlugin, TemporalAntialiasBundle, and TemporalAntialiasSettings --------- Co-authored-by: IceSentry <c.giguere42@gmail.com> Co-authored-by: IceSentry <IceSentry@users.noreply.github.com> Co-authored-by: Robert Swain <robert.swain@gmail.com> Co-authored-by: Daniel Chia <danstryder@gmail.com> Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com> Co-authored-by: Brandon Dyer <brandondyer64@gmail.com> Co-authored-by: Edgar Geier <geieredgar@gmail.com> |
||
Trevor Lovell
|
464d35aef5
|
docs: update docs and comments that still refer to stages (#8156)
# Objective Documentation should no longer be using pre-stageless terminology to avoid confusion. ## Solution - update all docs referring to stages to instead refer to sets/schedules where appropriate - also mention `apply_system_buffers` for anything system-buffer-related that previously referred to buffers being applied "at the end of a stage" |
||
|
IceSentry
|
2c21d423fd
|
Make render graph slots optional for most cases (#8109)
# Objective
- Currently, the render graph slots are only used to pass the
view_entity around. This introduces significant boilerplate for very
little value. Instead of using slots for this, make the view_entity part
of the `RenderGraphContext`. This also means we won't need to have
`IN_VIEW` on every node and and we'll be able to use the default impl of
`Node::input()`.
## Solution
- Add `view_entity: Option<Entity>` to the `RenderGraphContext`
- Update all nodes to use this instead of entity slot input
---
## Changelog
- Add optional `view_entity` to `RenderGraphContext`
## Migration Guide
You can now get the view_entity directly from the `RenderGraphContext`.
When implementing the Node:
```rust
// 0.10
struct FooNode;
impl FooNode {
const IN_VIEW: &'static str = "view";
}
impl Node for FooNode {
fn input(&self) -> Vec<SlotInfo> {
vec![SlotInfo::new(Self::IN_VIEW, SlotType::Entity)]
}
fn run(
&self,
graph: &mut RenderGraphContext,
// ...
) -> Result<(), NodeRunError> {
let view_entity = graph.get_input_entity(Self::IN_VIEW)?;
// ...
Ok(())
}
}
// 0.11
struct FooNode;
impl Node for FooNode {
fn run(
&self,
graph: &mut RenderGraphContext,
// ...
) -> Result<(), NodeRunError> {
let view_entity = graph.view_entity();
// ...
Ok(())
}
}
```
When adding the node to the graph, you don't need to specify a slot_edge
for the view_entity.
```rust
// 0.10
let mut graph = RenderGraph::default();
graph.add_node(FooNode::NAME, node);
let input_node_id = draw_2d_graph.set_input(vec![SlotInfo::new(
graph::input::VIEW_ENTITY,
SlotType::Entity,
)]);
graph.add_slot_edge(
input_node_id,
graph::input::VIEW_ENTITY,
FooNode::NAME,
FooNode::IN_VIEW,
);
// add_node_edge ...
// 0.11
let mut graph = RenderGraph::default();
graph.add_node(FooNode::NAME, node);
// add_node_edge ...
```
## Notes
This PR paired with #8007 will help reduce a lot of annoying boilerplate
with the render nodes. Depending on which one gets merged first. It will
require a bit of clean up work to make both compatible.
I tagged this as a breaking change, because using the old system to get
the view_entity will break things because it's not a node input slot
anymore.
## Notes for reviewers
A lot of the diffs are just removing the slots in every nodes and graph
creation. The important part is mostly in the
graph_runner/CameraDriverNode.
|
||
|
Carter Anderson
|
aefe1f0739
|
Schedule-First: the new and improved add_systems (#8079)
Co-authored-by: Mike <mike.hsu@gmail.com> |
||
|
IceSentry
|
9d1193df6c
|
Add low level post process example using a custom render pass (#6909)
Co-authored-by: JMS55 <47158642+JMS55@users.noreply.github.com> Co-authored-by: Robert Swain <robert.swain@gmail.com> |
||
ickshonpe
|
87dda354dd
|
Remove Val::Undefined (#7485)
|
||
JoJoJet
|
fd1af7c8b8
|
Replace multiple calls to add_system with add_systems (#8001)
|
||
IceSentry
|
71cf35ce42 |
Allow prepass in webgl (#7537)
# Objective - Use the prepass textures in webgl ## Solution - Bind the prepass textures even when using webgl, but only if msaa is disabled - Also did some refactors to centralize how textures are bound, similar to the EnvironmentMapLight PR - ~~Also did some refactors of the example to make it work in webgl~~ - ~~To make the example work in webgl, I needed to use a sampler for the depth texture, the resulting code looks a bit weird, but it's simple enough and I think it's worth it to show how it works when using webgl~~ |
||
Zhixing Zhang
|
16feb9acb7 |
Add push contant config to layout (#7681)
# Objective Allow for creating pipelines that use push constants. To be able to use push constants. Fixes #4825 As of right now, trying to call `RenderPass::set_push_constants` will trigger the following error: ``` thread 'main' panicked at 'wgpu error: Validation Error Caused by: In a RenderPass note: encoder = `<CommandBuffer-(0, 59, Vulkan)>` In a set_push_constant command provided push constant is for stage(s) VERTEX | FRAGMENT | VERTEX_FRAGMENT, however the pipeline layout has no push constant range for the stage(s) VERTEX | FRAGMENT | VERTEX_FRAGMENT ``` ## Solution Add a field push_constant_ranges to` RenderPipelineDescriptor` and `ComputePipelineDescriptor`. This PR supersedes #4908 which now contains merge conflicts due to significant changes to `bevy_render`. Meanwhile, this PR also made the `layout` field of `RenderPipelineDescriptor` and `ComputePipelineDescriptor` non-optional. If the user do not need to specify the bind group layouts, they can simply supply an empty vector here. No need for it to be optional. --- ## Changelog - Add a field push_constant_ranges to RenderPipelineDescriptor and ComputePipelineDescriptor - Made the `layout` field of RenderPipelineDescriptor and ComputePipelineDescriptor non-optional. ## Migration Guide - Add push_constant_ranges: Vec::new() to every `RenderPipelineDescriptor` and `ComputePipelineDescriptor` - Unwrap the optional values on the `layout` field of `RenderPipelineDescriptor` and `ComputePipelineDescriptor`. If the descriptor has no layout, supply an empty vector. Co-authored-by: Zhixing Zhang <me@neoto.xin> |
||
woodroww
|
1bd390806f |
added subdivisions to shape::Plane (#7546)
# Objective There was issue #191 requesting subdivisions on the shape::Plane. I also could have used this recently. I then write the solution. Fixes #191 ## Solution I changed the shape::Plane to include subdivisions field and the code to create the subdivisions. I don't know how people are counting subdivisions so as I put in the doc comments 0 subdivisions results in the original geometry of the Plane. Greater then 0 results in the number of lines dividing the plane. I didn't know if it would be better to create a new struct that implemented this feature, say SubdivisionPlane or change Plane. I decided on changing Plane as that was what the original issue was. It would be trivial to alter this to use another struct instead of altering Plane. The issues of migration, although small, would be eliminated if a new struct was implemented. ## Changelog ### Added Added subdivisions field to shape::Plane ## Migration Guide All the examples needed to be updated to initalize the subdivisions field. Also there were two tests in tests/window that need to be updated. A user would have to update all their uses of shape::Plane to initalize the subdivisions field. |
||
|
Rob Parrett
|
5b930c8486 |
Fix feature gating in texture_binding_array example (#7425)
# Objective Fixes #7374 ## Solution Move the feature gate into `main`, before `MaterialPlugin::<BindlessMaterial>` is added, as described in https://github.com/bevyengine/bevy/issues/7374#issuecomment-1405890519 |
||
|
Carter Anderson
|
dcc03724a5 |
Base Sets (#7466)
# Objective NOTE: This depends on #7267 and should not be merged until #7267 is merged. If you are reviewing this before that is merged, I highly recommend viewing the Base Sets commit instead of trying to find my changes amongst those from #7267. "Default sets" as described by the [Stageless RFC](https://github.com/bevyengine/rfcs/pull/45) have some [unfortunate consequences](https://github.com/bevyengine/bevy/discussions/7365). ## Solution This adds "base sets" as a variant of `SystemSet`: A set is a "base set" if `SystemSet::is_base` returns `true`. Typically this will be opted-in to using the `SystemSet` derive: ```rust #[derive(SystemSet, Clone, Hash, Debug, PartialEq, Eq)] #[system_set(base)] enum MyBaseSet { A, B, } ``` **Base sets are exclusive**: a system can belong to at most one "base set". Adding a system to more than one will result in an error. When possible we fail immediately during system-config-time with a nice file + line number. For the more nested graph-ey cases, this will fail at the final schedule build. **Base sets cannot belong to other sets**: this is where the word "base" comes from Systems and Sets can only be added to base sets using `in_base_set`. Calling `in_set` with a base set will fail. As will calling `in_base_set` with a normal set. ```rust app.add_system(foo.in_base_set(MyBaseSet::A)) // X must be a normal set ... base sets cannot be added to base sets .configure_set(X.in_base_set(MyBaseSet::A)) ``` Base sets can still be configured like normal sets: ```rust app.add_system(MyBaseSet::B.after(MyBaseSet::Ap)) ``` The primary use case for base sets is enabling a "default base set": ```rust schedule.set_default_base_set(CoreSet::Update) // this will belong to CoreSet::Update by default .add_system(foo) // this will override the default base set with PostUpdate .add_system(bar.in_base_set(CoreSet::PostUpdate)) ``` This allows us to build apis that work by default in the standard Bevy style. This is a rough analog to the "default stage" model, but it use the new "stageless sets" model instead, with all of the ordering flexibility (including exclusive systems) that it provides. --- ## Changelog - Added "base sets" and ported CoreSet to use them. ## Migration Guide TODO |
||
Alice Cecile
|
206c7ce219 |
Migrate engine to Schedule v3 (#7267)
Huge thanks to @maniwani, @devil-ira, @hymm, @cart, @superdump and @jakobhellermann for the help with this PR. # Objective - Followup #6587. - Minimal integration for the Stageless Scheduling RFC: https://github.com/bevyengine/rfcs/pull/45 ## Solution - [x] Remove old scheduling module - [x] Migrate new methods to no longer use extension methods - [x] Fix compiler errors - [x] Fix benchmarks - [x] Fix examples - [x] Fix docs - [x] Fix tests ## Changelog ### Added - a large number of methods on `App` to work with schedules ergonomically - the `CoreSchedule` enum - `App::add_extract_system` via the `RenderingAppExtension` trait extension method - the private `prepare_view_uniforms` system now has a public system set for scheduling purposes, called `ViewSet::PrepareUniforms` ### Removed - stages, and all code that mentions stages - states have been dramatically simplified, and no longer use a stack - `RunCriteriaLabel` - `AsSystemLabel` trait - `on_hierarchy_reports_enabled` run criteria (now just uses an ad hoc resource checking run condition) - systems in `RenderSet/Stage::Extract` no longer warn when they do not read data from the main world - `RunCriteriaLabel` - `transform_propagate_system_set`: this was a nonstandard pattern that didn't actually provide enough control. The systems are already `pub`: the docs have been updated to ensure that the third-party usage is clear. ### Changed - `System::default_labels` is now `System::default_system_sets`. - `App::add_default_labels` is now `App::add_default_sets` - `CoreStage` and `StartupStage` enums are now `CoreSet` and `StartupSet` - `App::add_system_set` was renamed to `App::add_systems` - The `StartupSchedule` label is now defined as part of the `CoreSchedules` enum - `.label(SystemLabel)` is now referred to as `.in_set(SystemSet)` - `SystemLabel` trait was replaced by `SystemSet` - `SystemTypeIdLabel<T>` was replaced by `SystemSetType<T>` - The `ReportHierarchyIssue` resource now has a public constructor (`new`), and implements `PartialEq` - Fixed time steps now use a schedule (`CoreSchedule::FixedTimeStep`) rather than a run criteria. - Adding rendering extraction systems now panics rather than silently failing if no subapp with the `RenderApp` label is found. - the `calculate_bounds` system, with the `CalculateBounds` label, is now in `CoreSet::Update`, rather than in `CoreSet::PostUpdate` before commands are applied. - `SceneSpawnerSystem` now runs under `CoreSet::Update`, rather than `CoreStage::PreUpdate.at_end()`. - `bevy_pbr::add_clusters` is no longer an exclusive system - the top level `bevy_ecs::schedule` module was replaced with `bevy_ecs::scheduling` - `tick_global_task_pools_on_main_thread` is no longer run as an exclusive system. Instead, it has been replaced by `tick_global_task_pools`, which uses a `NonSend` resource to force running on the main thread. ## Migration Guide - Calls to `.label(MyLabel)` should be replaced with `.in_set(MySet)` - Stages have been removed. Replace these with system sets, and then add command flushes using the `apply_system_buffers` exclusive system where needed. - The `CoreStage`, `StartupStage, `RenderStage` and `AssetStage` enums have been replaced with `CoreSet`, `StartupSet, `RenderSet` and `AssetSet`. The same scheduling guarantees have been preserved. - Systems are no longer added to `CoreSet::Update` by default. Add systems manually if this behavior is needed, although you should consider adding your game logic systems to `CoreSchedule::FixedTimestep` instead for more reliable framerate-independent behavior. - Similarly, startup systems are no longer part of `StartupSet::Startup` by default. In most cases, this won't matter to you. - For example, `add_system_to_stage(CoreStage::PostUpdate, my_system)` should be replaced with - `add_system(my_system.in_set(CoreSet::PostUpdate)` - When testing systems or otherwise running them in a headless fashion, simply construct and run a schedule using `Schedule::new()` and `World::run_schedule` rather than constructing stages - Run criteria have been renamed to run conditions. These can now be combined with each other and with states. - Looping run criteria and state stacks have been removed. Use an exclusive system that runs a schedule if you need this level of control over system control flow. - For app-level control flow over which schedules get run when (such as for rollback networking), create your own schedule and insert it under the `CoreSchedule::Outer` label. - Fixed timesteps are now evaluated in a schedule, rather than controlled via run criteria. The `run_fixed_timestep` system runs this schedule between `CoreSet::First` and `CoreSet::PreUpdate` by default. - Command flush points introduced by `AssetStage` have been removed. If you were relying on these, add them back manually. - Adding extract systems is now typically done directly on the main app. Make sure the `RenderingAppExtension` trait is in scope, then call `app.add_extract_system(my_system)`. - the `calculate_bounds` system, with the `CalculateBounds` label, is now in `CoreSet::Update`, rather than in `CoreSet::PostUpdate` before commands are applied. You may need to order your movement systems to occur before this system in order to avoid system order ambiguities in culling behavior. - the `RenderLabel` `AppLabel` was renamed to `RenderApp` for clarity - `App::add_state` now takes 0 arguments: the starting state is set based on the `Default` impl. - Instead of creating `SystemSet` containers for systems that run in stages, simply use `.on_enter::<State::Variant>()` or its `on_exit` or `on_update` siblings. - `SystemLabel` derives should be replaced with `SystemSet`. You will also need to add the `Debug`, `PartialEq`, `Eq`, and `Hash` traits to satisfy the new trait bounds. - `with_run_criteria` has been renamed to `run_if`. Run criteria have been renamed to run conditions for clarity, and should now simply return a bool. - States have been dramatically simplified: there is no longer a "state stack". To queue a transition to the next state, call `NextState::set` ## TODO - [x] remove dead methods on App and World - [x] add `App::add_system_to_schedule` and `App::add_systems_to_schedule` - [x] avoid adding the default system set at inappropriate times - [x] remove any accidental cycles in the default plugins schedule - [x] migrate benchmarks - [x] expose explicit labels for the built-in command flush points - [x] migrate engine code - [x] remove all mentions of stages from the docs - [x] verify docs for States - [x] fix uses of exclusive systems that use .end / .at_start / .before_commands - [x] migrate RenderStage and AssetStage - [x] migrate examples - [x] ensure that transform propagation is exported in a sufficiently public way (the systems are already pub) - [x] ensure that on_enter schedules are run at least once before the main app - [x] re-enable opt-in to execution order ambiguities - [x] revert change to `update_bounds` to ensure it runs in `PostUpdate` - [x] test all examples - [x] unbreak directional lights - [x] unbreak shadows (see 3d_scene, 3d_shape, lighting, transparaency_3d examples) - [x] game menu example shows loading screen and menu simultaneously - [x] display settings menu is a blank screen - [x] `without_winit` example panics - [x] ensure all tests pass - [x] SubApp doc test fails - [x] runs_spawn_local tasks fails - [x] [Fix panic_when_hierachy_cycle test hanging](https://github.com/alice-i-cecile/bevy/pull/120) ## Points of Difficulty and Controversy **Reviewers, please give feedback on these and look closely** 1. Default sets, from the RFC, have been removed. These added a tremendous amount of implicit complexity and result in hard to debug scheduling errors. They're going to be tackled in the form of "base sets" by @cart in a followup. 2. The outer schedule controls which schedule is run when `App::update` is called. 3. I implemented `Label for `Box<dyn Label>` for our label types. This enables us to store schedule labels in concrete form, and then later run them. I ran into the same set of problems when working with one-shot systems. We've previously investigated this pattern in depth, and it does not appear to lead to extra indirection with nested boxes. 4. `SubApp::update` simply runs the default schedule once. This sucks, but this whole API is incomplete and this was the minimal changeset. 5. `time_system` and `tick_global_task_pools_on_main_thread` no longer use exclusive systems to attempt to force scheduling order 6. Implemetnation strategy for fixed timesteps 7. `AssetStage` was migrated to `AssetSet` without reintroducing command flush points. These did not appear to be used, and it's nice to remove these bottlenecks. 8. Migration of `bevy_render/lib.rs` and pipelined rendering. The logic here is unusually tricky, as we have complex scheduling requirements. ## Future Work (ideally before 0.10) - Rename schedule_v3 module to schedule or scheduling - Add a derive macro to states, and likely a `EnumIter` trait of some form - Figure out what exactly to do with the "systems added should basically work by default" problem - Improve ergonomics for working with fixed timesteps and states - Polish FixedTime API to match Time - Rebase and merge #7415 - Resolve all internal ambiguities (blocked on better tools, especially #7442) - Add "base sets" to replace the removed default sets. |
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Elabajaba
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bfd1d4b0a7 |
Wgpu 0.15 (#7356)
# Objective Update Bevy to wgpu 0.15. ## Changelog - Update to wgpu 0.15, wgpu-hal 0.15.1, and naga 0.11 - Users can now use the [DirectX Shader Compiler](https://github.com/microsoft/DirectXShaderCompiler) (DXC) on Windows with DX12 for faster shader compilation and ShaderModel 6.0+ support (requires `dxcompiler.dll` and `dxil.dll`, which are included in DXC downloads from [here](https://github.com/microsoft/DirectXShaderCompiler/releases/latest)) ## Migration Guide ### WGSL Top-Level `let` is now `const` All top level constants are now declared with `const`, catching up with the wgsl spec. `let` is no longer allowed at the global scope, only within functions. ```diff -let SOME_CONSTANT = 12.0; +const SOME_CONSTANT = 12.0; ``` #### `TextureDescriptor` and `SurfaceConfiguration` now requires a `view_formats` field The new `view_formats` field in the `TextureDescriptor` is used to specify a list of formats the texture can be re-interpreted to in a texture view. Currently only changing srgb-ness is allowed (ex. `Rgba8Unorm` <=> `Rgba8UnormSrgb`). You should set `view_formats` to `&[]` (empty) unless you have a specific reason not to. #### The DirectX Shader Compiler (DXC) is now supported on DX12 DXC is now the default shader compiler when using the DX12 backend. DXC is Microsoft's replacement for their legacy FXC compiler, and is faster, less buggy, and allows for modern shader features to be used (ShaderModel 6.0+). DXC requires `dxcompiler.dll` and `dxil.dll` to be available, otherwise it will log a warning and fall back to FXC. You can get `dxcompiler.dll` and `dxil.dll` by downloading the latest release from [Microsoft's DirectXShaderCompiler github repo](https://github.com/microsoft/DirectXShaderCompiler/releases/latest) and copying them into your project's root directory. These must be included when you distribute your Bevy game/app/etc if you plan on supporting the DX12 backend and are using DXC. `WgpuSettings` now has a `dx12_shader_compiler` field which can be used to choose between either FXC or DXC (if you pass None for the paths for DXC, it will check for the .dlls in the working directory). |
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研究社交
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adae877be2 |
Use only one sampler in the array texture example. (#7405)
# Objective Fixes #7373 ## Solution Use only one sampler instead of an array of samplers. |
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Rob Parrett
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461497fa2d |
Fix a few uninlined_format_args lints (#7368)
# Objective Prevent things from breaking tomorrow when rust 1.67 is released. ## Solution Fix a few `uninlined_format_args` lints in recently introduced code. |
