mirror of
https://github.com/bevyengine/bevy
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173 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
robtfm
|
74ead1eb80
|
Add GltfLoaderSettings (#10804)
# Objective
when loading gltfs we may want to filter the results. in particular, i
need to be able to exclude cameras.
i can do this already by modifying the gltf after load and before
spawning, but it seems like a useful general option.
## Solution
add `GltfLoaderSettings` struct with bool members:
- `load_cameras` : checked before processing camera nodes.
- `load_lights` : checked before processing light nodes
- `load_meshes` : checked before loading meshes, materials and morph
weights
Existing code will work as before. Now you also have the option to
restrict what parts of the gltf are loaded. For example, to load a gltf
but exclude the cameras, replace a call to
`asset_server.load("my.gltf")` with:
```rust
asset_server.load_with_settings(
"my.gltf",
|s: &mut GltfLoaderSettings| {
s.load_cameras = false;
}
);
```
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
|
||
tygyh
|
fd308571c4
|
Remove unnecessary path prefixes (#10749)
# Objective - Shorten paths by removing unnecessary prefixes ## Solution - Remove the prefixes from many paths which do not need them. Finding the paths was done automatically using built-in refactoring tools in Jetbrains RustRover. |
||
Carter Anderson
|
cc6c4d65ed
|
Fix GLTF scene dependencies and make full scene renders predictable (#10745)
# Objective Fixes #10688 There were a number of issues at play: 1. The GLTF loader was not registering Scene dependencies properly. They were being registered at the root instead of on the scene assets. This made `LoadedWithDependencies` fire immediately on load. 2. Recursive labeled assets _inside_ of labeled assets were not being loaded. This only became relevant for scenes after fixing (1) because we now add labeled assets to the nested scene `LoadContext` instead of the root load context. I'm surprised nobody has hit this yet. I'm glad I caught it before somebody hit it. 3. Accessing "loaded with dependencies" state on the Asset Server is boilerplatey + error prone (because you need to manually query two states). ## Solution 1. In GltfLoader, use a nested LoadContext for scenes and load dependencies through that context. 2. In the `AssetServer`, load labeled assets recursively. 3. Added a simple `asset_server.is_loaded_with_dependencies(id)` I also added some docs to `LoadContext` to help prevent this problem in the future. --- ## Changelog - Added `AssetServer::is_loaded_with_dependencies` - Fixed GLTF Scene dependencies - Fixed nested labeled assets not being loaded --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> |
||
Ame
|
8c0ce5280b
|
Standardize toml format with taplo (#10594)
# Objective - Standardize fmt for toml files ## Solution - Add [taplo](https://taplo.tamasfe.dev/) to CI (check for fmt and diff for toml files), for context taplo is used by the most popular extension in VScode [Even Better TOML](https://marketplace.visualstudio.com/items?itemName=tamasfe.even-better-toml - Add contribution section to explain toml fmt with taplo. Now to pass CI you need to run `taplo fmt --option indent_string=" "` or if you use vscode have the `Even Better TOML` extension with 4 spaces for indent --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> |
||
|
Ame
|
951c9bb1a2
|
Add [lints] table, fix adding #![allow(clippy::type_complexity)] everywhere (#10011)
# Objective - Fix adding `#![allow(clippy::type_complexity)]` everywhere. like #9796 ## Solution - Use the new [lints] table that will land in 1.74 (https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#lints) - inherit lint to the workspace, crates and examples. ``` [lints] workspace = true ``` ## Changelog - Bump rust version to 1.74 - Enable lints table for the workspace ```toml [workspace.lints.clippy] type_complexity = "allow" ``` - Allow type complexity for all crates and examples ```toml [lints] workspace = true ``` --------- Co-authored-by: Martín Maita <47983254+mnmaita@users.noreply.github.com> |
||
st0rmbtw
|
cbcd826612
|
Explicit color conversion methods (#10321)
# Objective Closes #10319 ## Changelog * Added a new `Color::rgba_from_array([f32; 4]) -> Color` method. * Added a new `Color::rgb_from_array([f32; 3]) -> Color` method. * Added a new `Color::rgba_linear_from_array([f32; 4]) -> Color` method. * Added a new `Color::rgb_linear_from_array([f32; 3]) -> Color` method. * Added a new `Color::hsla_from_array([f32; 4]) -> Color` method. * Added a new `Color::hsl_from_array([f32; 3]) -> Color` method. * Added a new `Color::lcha_from_array([f32; 4]) -> Color` method. * Added a new `Color::lch_from_array([f32; 3]) -> Color` method. * Added a new `Color::rgba_to_vec4(&self) -> Vec4` method. * Added a new `Color::rgba_to_array(&self) -> [f32; 4]` method. * Added a new `Color::rgb_to_vec3(&self) -> Vec3` method. * Added a new `Color::rgb_to_array(&self) -> [f32; 3]` method. * Added a new `Color::rgba_linear_to_vec4(&self) -> Vec4` method. * Added a new `Color::rgba_linear_to_array(&self) -> [f32; 4]` method. * Added a new `Color::rgb_linear_to_vec3(&self) -> Vec3` method. * Added a new `Color::rgb_linear_to_array(&self) -> [f32; 3]` method. * Added a new `Color::hsla_to_vec4(&self) -> Vec4` method. * Added a new `Color::hsla_to_array(&self) -> [f32; 4]` method. * Added a new `Color::hsl_to_vec3(&self) -> Vec3` method. * Added a new `Color::hsl_to_array(&self) -> [f32; 3]` method. * Added a new `Color::lcha_to_vec4(&self) -> Vec4` method. * Added a new `Color::lcha_to_array(&self) -> [f32; 4]` method. * Added a new `Color::lch_to_vec3(&self) -> Vec3` method. * Added a new `Color::lch_to_array(&self) -> [f32; 3]` method. ## Migration Guide `Color::from(Vec4)` is now `Color::rgba_from_array(impl Into<[f32; 4]>)` `Vec4::from(Color)` is now `Color::rgba_to_vec4(&self)` Before: ```rust let color_vec4 = Vec4::new(0.5, 0.5, 0.5); let color_from_vec4 = Color::from(color_vec4); let color_array = [0.5, 0.5, 0.5]; let color_from_array = Color::from(color_array); ``` After: ```rust let color_vec4 = Vec4::new(0.5, 0.5, 0.5); let color_from_vec4 = Color::rgba_from_array(color_vec4); let color_array = [0.5, 0.5, 0.5]; let color_from_array = Color::rgba_from_array(color_array); ``` |
||
github-actions[bot]
|
bf30a25efc
|
Release 0.12 (#10362)
Preparing next release This PR has been auto-generated --------- Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: François <mockersf@gmail.com> |
||
Marco Buono
|
44928e0df4
|
StandardMaterial Light Transmission (#8015)
# Objective
<img width="1920" alt="Screenshot 2023-04-26 at 01 07 34"
src="https://user-images.githubusercontent.com/418473/234467578-0f34187b-5863-4ea1-88e9-7a6bb8ce8da3.png">
This PR adds both diffuse and specular light transmission capabilities
to the `StandardMaterial`, with support for screen space refractions.
This enables realistically representing a wide range of real-world
materials, such as:
- Glass; (Including frosted glass)
- Transparent and translucent plastics;
- Various liquids and gels;
- Gemstones;
- Marble;
- Wax;
- Paper;
- Leaves;
- Porcelain.
Unlike existing support for transparency, light transmission does not
rely on fixed function alpha blending, and therefore works with both
`AlphaMode::Opaque` and `AlphaMode::Mask` materials.
## Solution
- Introduces a number of transmission related fields in the
`StandardMaterial`;
- For specular transmission:
- Adds logic to take a view main texture snapshot after the opaque
phase; (in order to perform screen space refractions)
- Introduces a new `Transmissive3d` phase to the renderer, to which all
meshes with `transmission > 0.0` materials are sent.
- Calculates a light exit point (of the approximate mesh volume) using
`ior` and `thickness` properties
- Samples the snapshot texture with an adaptive number of taps across a
`roughness`-controlled radius enabling “blurry” refractions
- For diffuse transmission:
- Approximates transmitted diffuse light by using a second, flipped +
displaced, diffuse-only Lambertian lobe for each light source.
## To Do
- [x] Figure out where `fresnel_mix()` is taking place, if at all, and
where `dielectric_specular` is being calculated, if at all, and update
them to use the `ior` value (Not a blocker, just a nice-to-have for more
correct BSDF)
- To the _best of my knowledge, this is now taking place, after
|
||
|
Carter Anderson
|
134750d18e
|
Image Sampler Improvements (#10254)
# Objective - Build on the changes in https://github.com/bevyengine/bevy/pull/9982 - Use `ImageSamplerDescriptor` as the "public image sampler descriptor" interface in all places (for consistency) - Make it possible to configure textures to use the "default" sampler (as configured in the `DefaultImageSampler` resource) - Fix a bug introduced in #9982 that prevents configured samplers from being used in Basis, KTX2, and DDS textures --- ## Migration Guide - When using the `Image` API, use `ImageSamplerDescriptor` instead of `wgpu::SamplerDescriptor` - If writing custom wgpu renderer features that work with `Image`, call `&image_sampler.as_wgpu()` to convert to a wgpu descriptor. |
||
Kanabenki
|
756fb069b1
|
Add ImageSamplerDescriptor as an image loader setting (#9982)
Closes #9946 # Objective Add a new type mirroring `wgpu::SamplerDescriptor` for `ImageLoaderSettings` to control how a loaded image should be sampled. Fix issues with texture sampler descriptors not being set when loading gltf texture from URI. ## Solution Add a new `ImageSamplerDescriptor` and its affiliated types that mirrors `wgpu::SamplerDescriptor`, use it in the image loader settings. --- ## Changelog ### Added - Added new types `ImageSamplerDescriptor`, `ImageAddressMode`, `ImageFilterMode`, `ImageCompareFunction` and `ImageSamplerBorderColor` that mirrors the corresponding wgpu types. - `ImageLoaderSettings` now carries an `ImageSamplerDescriptor` field that will be used to determine how the loaded image is sampled, and will be serialized as part of the image assets `.meta` files. ### Changed - `Image::from_buffer` now takes the sampler descriptor to use as an additional parameter. ### Fixed - Sampler descriptors are set for gltf textures loaded from URI. |
||
|
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.
|
||
François
|
9290674060
|
GLTF loader: handle warning NODE_SKINNED_MESH_WITHOUT_SKIN (#9360)
# Objective - According to the GLTF spec, it should not be possible to have a non skinned mesh on a skinned node > When the node contains skin, all mesh.primitives MUST contain JOINTS_0 and WEIGHTS_0 attributes > https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#reference-node - However, the reverse (a skinned mesh on a non skinned node) is just a warning, see `NODE_SKINNED_MESH_WITHOUT_SKIN` in https://github.com/KhronosGroup/glTF-Validator/blob/main/ISSUES.md#linkerror - This causes a crash in Bevy because the bind group layout is made from the mesh which is skinned, but filled from the entity which is not ``` thread '<unnamed>' panicked at 'wgpu error: Validation Error Caused by: In a RenderPass note: encoder = `<CommandBuffer-(0, 5, Metal)>` In a set_bind_group command note: bind group = `<BindGroup-(27, 1, Metal)>` Bind group 2 expects 2 dynamic offsets. However 1 dynamic offset were provided. ``` - Blender can export GLTF files with this kind of issues ## Solution - When a skinned mesh is only used on non skinned nodes, ignore skinned information from the mesh and warn the user (this is what three.js is doing) - When a skinned mesh is used on both skinned and non skinned nodes, log an error |
||
Zachary Harrold
|
dd46fd3aee
|
Removed anyhow (#10003)
# Objective - Fixes #8140 ## Solution - Added Explicit Error Typing for `AssetLoader` and `AssetSaver`, which were the last instances of `anyhow` in use across Bevy. --- ## Changelog - Added an associated type `Error` to `AssetLoader` and `AssetSaver` for use with the `load` and `save` methods respectively. - Changed `ErasedAssetLoader` and `ErasedAssetSaver` `load` and `save` methods to use `Box<dyn Error + Send + Sync + 'static>` to allow for arbitrary `Error` types from the non-erased trait variants. Note the strict requirements match the pre-existing requirements around `anyhow::Error`. ## Migration Guide - `anyhow` is no longer exported by `bevy_asset`; Add it to your own project (if required). - `AssetLoader` and `AssetSaver` have an associated type `Error`; Define an appropriate error type (e.g., using `thiserror`), or use a pre-made error type (e.g., `anyhow::Error`). Note that using `anyhow::Error` is a drop-in replacement. - `AssetLoaderError` has been removed; Define a new error type, or use an alternative (e.g., `anyhow::Error`) - All the first-party `AssetLoader`'s and `AssetSaver`'s now return relevant (and narrow) error types instead of a single ambiguous type; Match over the specific error type, or encapsulate (`Box<dyn>`, `thiserror`, `anyhow`, etc.) ## Notes A simpler PR to resolve this issue would simply define a Bevy `Error` type defined as `Box<dyn std::error::Error + Send + Sync + 'static>`, but I think this type of error handling should be discouraged when possible. Since only 2 traits required the use of `anyhow`, it isn't a substantive body of work to solidify these error types, and remove `anyhow` entirely. End users are still encouraged to use `anyhow` if that is their preferred error handling style. Arguably, adding the `Error` associated type gives more freedom to end-users to decide whether they want more or less explicit error handling (`anyhow` vs `thiserror`). As an aside, I didn't perform any testing on Android or WASM. CI passed locally, but there may be mistakes for those platforms I missed. |
||
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Kanabenki
|
375af64e8c
|
Finish documenting bevy_gltf (#9998)
# Objective - Finish documenting `bevy_gltf`. ## Solution - Document the remaining items, add links to the glTF spec where relevant. Add the `warn(missing_doc)` attribute. |
||
Patrick Walton
|
44a9a4cc86
|
Import the second UV map if present in glTF files. (#9992)
Conventionally, the second UV map (`TEXCOORD1`, `UV1`) is used for lightmap UVs. This commit allows Bevy to import them, so that a custom shader that applies lightmaps can use those UVs if desired. Note that this doesn't actually apply lightmaps to Bevy meshes; that will be a followup. It does, however, open the door to future Bevy plugins that implement baked global illumination. ## Changelog ### Added The Bevy glTF loader now imports a second UV channel (`TEXCOORD1`, `UV1`) from meshes if present. This can be used by custom shaders to implement lightmapping. |
||
floppyhammer
|
354a5b7933
|
Handle empty morph weights when loading gltf (#9867)
# Objective Fixes https://github.com/bevyengine/bevy/issues/9863. ## Solution Spawn `MorphWeights` after we handle `MeshMorphWeights` for the children. |
||
|
robtfm
|
28060f3180
|
invert face culling for negatively scaled gltf nodes (#8859)
# Objective according to [khronos](https://github.com/KhronosGroup/glTF/issues/1697), gltf nodes with inverted scales should invert the winding order of the mesh data. this is to allow negative scale to be used for mirrored geometry. ## Solution in the gltf loader, create a separate material with `cull_mode` set to `Face::Front` when the node scale is negative. note/alternatives: this applies for nodes where the scale is negative at gltf import time. that seems like enough for the mentioned use case of mirrored geometry. it doesn't help when scales dynamically go negative at runtime, but you can always set double sided in that case. i don't think there's any practical difference between using front-face culling and setting a clockwise winding order explicitly, but winding order is supported by wgpu so we could add the field to StandardMaterial/StandardMaterialKey and set it directly on the pipeline descriptor if there's a reason to. it wouldn't help with dynamic scale adjustments anyway, and would still require a separate material. fixes #4738, probably fixes #7901. --------- Co-authored-by: François <mockersf@gmail.com> |
||
|
Carter Anderson
|
5eb292dc10
|
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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François
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b28f6334da
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only take up to the max number of joints (#9351)
# Objective - Meshes with a higher number of joints than `MAX_JOINTS` are crashing - Fixes partly #9021 (doesn't crash anymore, but the mesh is not correctly displayed) ## Solution - Only take up to `MAX_JOINTS` joints when extending the buffer |
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JMS55
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228e7aa618
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Add support for KHR_materials_emissive_strength (#9553)
# Objective - Fix blender gltf imports with emissive materials - Progress towards https://github.com/bevyengine/bevy/issues/5178 ## Solution - Upgrade to gltf-rs 1.3 supporiting [KHR_materials_emissive_strength](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_materials_emissive_strength/README.md) --- ## Changelog - GLTF files using `emissiveStrength` (such as those exported by blender) are now supported ## Migration Guide - The GLTF asset loader will now factor in `emissiveStrength` when converting to Bevy's `StandardMaterial::emissive`. Blender will export emissive materials using this field. Remove the field from your GLTF files or manually modify your materials post-asset-load to match how Bevy would load these files in previous versions. |
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Ada Hieta
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a024a1f3b9
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Fix point light radius (#9493)
# Objective Fixes #9488 ## Solution Set point light radius to always be 0.0. Reading this value from glTF would require using application specific extras property. --- ## Changelog ### Fixed - #9488 Point Lights use Range for Radius when importing from GLTF |
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François
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3aad5c6b99
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animations: convert skinning weights from unorm8x4 to float32x4 (#9338)
# Objective - Fixes part of #9021 ## Solution - Joint mesh are in format `Unorm8x4` in some gltf file, but Bevy expects a `Float32x4`. Converts them. Also converts `Unorm16x4` - According to gltf spec: https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#skinned-mesh-attributes > WEIGHTS_n: float, or normalized unsigned byte, or normalized unsigned short |
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robtfm
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b30ff2ab76
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allow asset loader pre-registration (#9429)
# Objective - When loading gltf files during app creation (for example using a FromWorld impl and adding that as a resource), no loader was found. - As the gltf loader can load compressed formats, it needs to know what the GPU supports so it's not available at app creation time. ## Solution alternative to #9426 - add functionality to preregister the loader. loading assets with matching extensions will block until a real loader is registered. - preregister "gltf" and "glb". - prereigster image formats. the way this is set up, if a set of extensions are all registered with a single preregistration call, then later a loader is added that matches some of the extensions, assets using the remaining extensions will then fail. i think that should work well for image formats that we don't know are supported until later. |
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Sélène Amanita
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cbe13f3aa5
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Improve Mesh documentation (#9061)
# Objective This PR continues https://github.com/bevyengine/bevy/pull/8885 It aims to improve the `Mesh` documentation in the following ways: - Put everything at the "top level" instead of the "impl". - Explain better what is a Mesh, how it can be created, and that it can be edited. - Explain it can be used with a `Material`, and mention `StandardMaterial`, `PbrBundle`, `ColorMaterial`, and `ColorMesh2dBundle` since those cover most cases - Mention the glTF/Bevy vocabulary discrepancy for "Mesh" - Add an image for the example - Various nitpicky modifications ## Note - The image I added is 90.3ko which I think is small enough? - Since rustdoc doesn't allow cross-reference not in dependencies of a subcrate [yet](https://github.com/rust-lang/rust/issues/74481), I have a lot of backtick references that are not links :( - Since rustdoc doesn't allow linking to code in the crate (?) I put link to github directly. - Since rustdoc doesn't allow embed images in doc [yet](https://github.com/rust-lang/rust/issues/32104), maybe [soon](https://github.com/rust-lang/rfcs/pull/3397), I had to put only a link to the image. I don't think it's worth adding [embed_doc_image](https://docs.rs/embed-doc-image/latest/embed_doc_image/) as a dependency for this. |
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66OJ66
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5b0e6a5321
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Fix panic whilst loading UASTC encoded ktx2 textures (#9158)
# Objective Fixes #9121 Context: - `ImageTextureLoader` depends on `RenderDevice` to work out which compressed image formats it can support - `RenderDevice` is initialised by `RenderPlugin` - https://github.com/bevyengine/bevy/pull/8336 made `RenderPlugin` initialisation async - This caused `RenderDevice` to be missing at the time of `ImageTextureLoader` initialisation, which in turn meant UASTC encoded ktx2 textures were being converted to unsupported formats, and thus caused panics ## Solution - Delay `ImageTextureLoader` initialisation --- ## Changelog - Moved `ImageTextureLoader` initialisation from `ImagePlugin::build()` to `ImagePlugin::finish()` - Default to `CompressedImageFormats::NONE` if `RenderDevice` resource is missing --------- Co-authored-by: 66OJ66 <hi0obxud@anonaddy.me> |
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Patrick Walton
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05a35f6f48
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Add GltfLoader::new. (#9120)
# Objective In my application, I'm manually wrapping the built-in Bevy loaders with a wrapper loader that stores some metadata before calling into the inner Bevy loader. This worked for the glTF loader in Bevy 0.10, but in Bevy 0.11 it became impossible to do this because the glTF loader became unconstructible outside Bevy due to the new private fields within it. It's now in fact impossible to get a reference to a GltfLoader at all from outside Bevy, because the only way to construct a GltfLoader is to add the GltfPlugin to an App, and the GltfPlugin only hands out references to its GltfLoader to the asset server, which provides no public access to the loaders it manages. ## Solution This commit fixes the problem by adding a public `new` method to allow manual construction of a glTF loader. --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
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Carter Anderson
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7c3131a761
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Bump Version after Release (#9106)
CI-capable version of #9086 --------- Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: François <mockersf@gmail.com> |
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Carter Anderson
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8ba9571eed
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Release 0.11.0 (#9080)
I created this manually as Github didn't want to run CI for the workflow-generated PR. I'm guessing we didn't hit this in previous releases because we used bors. Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com> |
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Gino Valente
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aeeb20ec4c
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bevy_reflect: FromReflect Ergonomics Implementation (#6056)
# Objective **This implementation is based on https://github.com/bevyengine/rfcs/pull/59.** --- Resolves #4597 Full details and motivation can be found in the RFC, but here's a brief summary. `FromReflect` is a very powerful and important trait within the reflection API. It allows Dynamic types (e.g., `DynamicList`, etc.) to be formed into Real ones (e.g., `Vec<i32>`, etc.). This mainly comes into play concerning deserialization, where the reflection deserializers both return a `Box<dyn Reflect>` that almost always contain one of these Dynamic representations of a Real type. To convert this to our Real type, we need to use `FromReflect`. It also sneaks up in other ways. For example, it's a required bound for `T` in `Vec<T>` so that `Vec<T>` as a whole can be made `FromReflect`. It's also required by all fields of an enum as it's used as part of the `Reflect::apply` implementation. So in other words, much like `GetTypeRegistration` and `Typed`, it is very much a core reflection trait. The problem is that it is not currently treated like a core trait and is not automatically derived alongside `Reflect`. This makes using it a bit cumbersome and easy to forget. ## Solution Automatically derive `FromReflect` when deriving `Reflect`. Users can then choose to opt-out if needed using the `#[reflect(from_reflect = false)]` attribute. ```rust #[derive(Reflect)] struct Foo; #[derive(Reflect)] #[reflect(from_reflect = false)] struct Bar; fn test<T: FromReflect>(value: T) {} test(Foo); // <-- OK test(Bar); // <-- Panic! Bar does not implement trait `FromReflect` ``` #### `ReflectFromReflect` This PR also automatically adds the `ReflectFromReflect` (introduced in #6245) registration to the derived `GetTypeRegistration` impl— if the type hasn't opted out of `FromReflect` of course. <details> <summary><h4>Improved Deserialization</h4></summary> > **Warning** > This section includes changes that have since been descoped from this PR. They will likely be implemented again in a followup PR. I am mainly leaving these details in for archival purposes, as well as for reference when implementing this logic again. And since we can do all the above, we might as well improve deserialization. We can now choose to deserialize into a Dynamic type or automatically convert it using `FromReflect` under the hood. `[Un]TypedReflectDeserializer::new` will now perform the conversion and return the `Box`'d Real type. `[Un]TypedReflectDeserializer::new_dynamic` will work like what we have now and simply return the `Box`'d Dynamic type. ```rust // Returns the Real type let reflect_deserializer = UntypedReflectDeserializer::new(®istry); let mut deserializer = ron:🇩🇪:Deserializer::from_str(input)?; let output: SomeStruct = reflect_deserializer.deserialize(&mut deserializer)?.take()?; // Returns the Dynamic type let reflect_deserializer = UntypedReflectDeserializer::new_dynamic(®istry); let mut deserializer = ron:🇩🇪:Deserializer::from_str(input)?; let output: DynamicStruct = reflect_deserializer.deserialize(&mut deserializer)?.take()?; ``` </details> --- ## Changelog * `FromReflect` is now automatically derived within the `Reflect` derive macro * This includes auto-registering `ReflectFromReflect` in the derived `GetTypeRegistration` impl * ~~Renamed `TypedReflectDeserializer::new` and `UntypedReflectDeserializer::new` to `TypedReflectDeserializer::new_dynamic` and `UntypedReflectDeserializer::new_dynamic`, respectively~~ **Descoped** * ~~Changed `TypedReflectDeserializer::new` and `UntypedReflectDeserializer::new` to automatically convert the deserialized output using `FromReflect`~~ **Descoped** ## Migration Guide * `FromReflect` is now automatically derived within the `Reflect` derive macro. Items with both derives will need to remove the `FromReflect` one. ```rust // OLD #[derive(Reflect, FromReflect)] struct Foo; // NEW #[derive(Reflect)] struct Foo; ``` If using a manual implementation of `FromReflect` and the `Reflect` derive, users will need to opt-out of the automatic implementation. ```rust // OLD #[derive(Reflect)] struct Foo; impl FromReflect for Foo {/* ... */} // NEW #[derive(Reflect)] #[reflect(from_reflect = false)] struct Foo; impl FromReflect for Foo {/* ... */} ``` <details> <summary><h4>Removed Migrations</h4></summary> > **Warning** > This section includes changes that have since been descoped from this PR. They will likely be implemented again in a followup PR. I am mainly leaving these details in for archival purposes, as well as for reference when implementing this logic again. * The reflect deserializers now perform a `FromReflect` conversion internally. The expected output of `TypedReflectDeserializer::new` and `UntypedReflectDeserializer::new` is no longer a Dynamic (e.g., `DynamicList`), but its Real counterpart (e.g., `Vec<i32>`). ```rust let reflect_deserializer = UntypedReflectDeserializer::new_dynamic(®istry); let mut deserializer = ron:🇩🇪:Deserializer::from_str(input)?; // OLD let output: DynamicStruct = reflect_deserializer.deserialize(&mut deserializer)?.take()?; // NEW let output: SomeStruct = reflect_deserializer.deserialize(&mut deserializer)?.take()?; ``` Alternatively, if this behavior isn't desired, use the `TypedReflectDeserializer::new_dynamic` and `UntypedReflectDeserializer::new_dynamic` methods instead: ```rust // OLD let reflect_deserializer = UntypedReflectDeserializer::new(®istry); // NEW let reflect_deserializer = UntypedReflectDeserializer::new_dynamic(®istry); ``` </details> --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
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Nicola Papale
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c6170d48f9
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Add morph targets (#8158)
# Objective - Add morph targets to `bevy_pbr` (closes #5756) & load them from glTF - Supersedes #3722 - Fixes #6814 [Morph targets][1] (also known as shape interpolation, shape keys, or blend shapes) allow animating individual vertices with fine grained controls. This is typically used for facial expressions. By specifying multiple poses as vertex offset, and providing a set of weight of each pose, it is possible to define surprisingly realistic transitions between poses. Blending between multiple poses also allow composition. Morph targets are part of the [gltf standard][2] and are a feature of Unity and Unreal, and babylone.js, it is only natural to implement them in bevy. ## Solution This implementation of morph targets uses a 3d texture where each pixel is a component of an animated attribute. Each layer is a different target. We use a 2d texture for each target, because the number of attribute×components×animated vertices is expected to always exceed the maximum pixel row size limit of webGL2. It copies fairly closely the way skinning is implemented on the CPU side, while on the GPU side, the shader morph target implementation is a relatively trivial detail. We add an optional `morph_texture` to the `Mesh` struct. The `morph_texture` is built through a method that accepts an iterator over attribute buffers. The `MorphWeights` component, user-accessible, controls the blend of poses used by mesh instances (so that multiple copy of the same mesh may have different weights), all the weights are uploaded to a uniform buffer of 256 `f32`. We limit to 16 poses per mesh, and a total of 256 poses. More literature: * Old babylone.js implementation (vertex attribute-based): https://www.eternalcoding.com/dev-log-1-morph-targets/ * Babylone.js implementation (similar to ours): https://www.youtube.com/watch?v=LBPRmGgU0PE * GPU gems 3: https://developer.nvidia.com/gpugems/gpugems3/part-i-geometry/chapter-3-directx-10-blend-shapes-breaking-limits * Development discord thread https://discord.com/channels/691052431525675048/1083325980615114772 https://user-images.githubusercontent.com/26321040/231181046-3bca2ab2-d4d9-472e-8098-639f1871ce2e.mp4 https://github.com/bevyengine/bevy/assets/26321040/d2a0c544-0ef8-45cf-9f99-8c3792f5a258 ## Acknowledgements * Thanks to `storytold` for sponsoring the feature * Thanks to `superdump` and `james7132` for guidance and help figuring out stuff ## Future work - Handling of less and more attributes (eg: animated uv, animated arbitrary attributes) - Dynamic pose allocation (so that zero-weighted poses aren't uploaded to GPU for example, enables much more total poses) - Better animation API, see #8357 ---- ## Changelog - Add morph targets to bevy meshes - Support up to 64 poses per mesh of individually up to 116508 vertices, animation currently strictly limited to the position, normal and tangent attributes. - Load a morph target using `Mesh::set_morph_targets` - Add `VisitMorphTargets` and `VisitMorphAttributes` traits to `bevy_render`, this allows defining morph targets (a fairly complex and nested data structure) through iterators (ie: single copy instead of passing around buffers), see documentation of those traits for details - Add `MorphWeights` component exported by `bevy_render` - `MorphWeights` control mesh's morph target weights, blending between various poses defined as morph targets. - `MorphWeights` are directly inherited by direct children (single level of hierarchy) of an entity. This allows controlling several mesh primitives through a unique entity _as per GLTF spec_. - Add `MorphTargetNames` component, naming each indices of loaded morph targets. - Load morph targets weights and buffers in `bevy_gltf` - handle morph targets animations in `bevy_animation` (previously, it was a `warn!` log) - Add the `MorphStressTest.gltf` asset for morph targets testing, taken from the glTF samples repo, CC0. - Add morph target manipulation to `scene_viewer` - Separate the animation code in `scene_viewer` from the rest of the code, reducing `#[cfg(feature)]` noise - Add the `morph_targets.rs` example to show off how to manipulate morph targets, loading `MorpStressTest.gltf` ## Migration Guide - (very specialized, unlikely to be touched by 3rd parties) - `MeshPipeline` now has a single `mesh_layouts` field rather than separate `mesh_layout` and `skinned_mesh_layout` fields. You should handle all possible mesh bind group layouts in your implementation - You should also handle properly the new `MORPH_TARGETS` shader def and mesh pipeline key. A new function is exposed to make this easier: `setup_moprh_and_skinning_defs` - The `MeshBindGroup` is now `MeshBindGroups`, cached bind groups are now accessed through the `get` method. [1]: https://en.wikipedia.org/wiki/Morph_target_animation [2]: https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#morph-targets --------- Co-authored-by: François <mockersf@gmail.com> Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
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Raffaele Ragni
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7fc6db32ce
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Add FromReflect where Reflect is used (#8776)
# Objective Discovered that PointLight did not implement FromReflect. Adding FromReflect where Reflect is used. I overreached and applied this rule everywhere there was a Reflect without a FromReflect, except from where the compiler wouldn't allow me. Based from question: https://github.com/bevyengine/bevy/discussions/8774 ## Solution - Adding FromReflect where Reflect was already derived ## Notes First PR I do in this ecosystem, so not sure if this is the usual approach, that is, to touch many files at once. --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> |
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radiish
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1efc762924
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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`?](
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Robin KAY
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d74533b407
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Add support for custom glTF vertex attributes. (#5370)
# Objective The objective is to be able to load data from "application-specific" (see glTF spec 3.7.2.1.) vertex attribute semantics from glTF files into Bevy meshes. ## Solution Rather than probe the glTF for the specific attributes supported by Bevy, this PR changes the loader to iterate through all the attributes and map them onto `MeshVertexAttribute`s. This mapping includes all the previously supported attributes, plus it is now possible to add mappings using the `add_custom_vertex_attribute()` method on `GltfPlugin`. ## Changelog - Add support for loading custom vertex attributes from glTF files. - Add the `custom_gltf_vertex_attribute.rs` example to illustrate loading custom vertex attributes. ## Migration Guide - If you were instantiating `GltfPlugin` using the unit-like struct syntax, you must instead use `GltfPlugin::default()` as the type is no longer unit-like. |
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JoJoJet
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3ead10a3e0
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Suppress the clippy::type_complexity lint (#8313)
# Objective The clippy lint `type_complexity` is known not to play well with bevy. It frequently triggers when writing complex queries, and taking the lint's advice of using a type alias almost always just obfuscates the code with no benefit. Because of this, this lint is currently ignored in CI, but unfortunately it still shows up when viewing bevy code in an IDE. As someone who's made a fair amount of pull requests to this repo, I will say that this issue has been a consistent thorn in my side. Since bevy code is filled with spurious, ignorable warnings, it can be very difficult to spot the *real* warnings that must be fixed -- most of the time I just ignore all warnings, only to later find out that one of them was real after I'm done when CI runs. ## Solution Suppress this lint in all bevy crates. This was previously attempted in #7050, but the review process ended up making it more complicated than it needs to be and landed on a subpar solution. The discussion in https://github.com/rust-lang/rust-clippy/pull/10571 explores some better long-term solutions to this problem. Since there is no timeline on when these solutions may land, we should resolve this issue in the meantime by locally suppressing these lints. ### Unresolved issues Currently, these lints are not suppressed in our examples, since that would require suppressing the lint in every single source file. They are still ignored in CI. |
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Zhixing Zhang
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2aaaed7f69
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Make bevy_render an optional dependency of bevy_scene (#8136)
# Objective bevy-scene does not have a reason to depend on bevy-render except to include the `Visibility` and `ComputedVisibility` components. Including that in the dependency chain is unnecessary for people not using `bevy_render`. Also fixed a problem where compilation fails when the `serialize` feature was not enabled. ## Solution This was added in #5335 to address some of the problems caused by #5310. Imo the user just always have to remember to include `VisibilityBundle` when they spawn `SceneBundle` or `DynamicSceneBundle`, but that will be a breaking change. This PR makes `bevy_render` an optional dependency of `bevy_scene` instead to respect the existing behavior. |
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github-actions[bot]
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6898351348
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chore: Release (#7920)
Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com> |
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github-actions[bot]
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b44af49200 |
Release 0.10.0 (#7919)
Preparing next release This PR has been auto-generated |
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github-actions[bot]
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8eb67932f1 |
Bump Version after Release (#7918)
Bump version after release This PR has been auto-generated |
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Edgar Geier
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30b29deaa9 |
Change the glTF loader to use Camera3dBundle (#7890)
# Objective - Fixes #7889. ## Solution - Change the glTF loader to insert a `Camera3dBundle` instead of a manually constructed bundle. This might prevent future issues when new components are required for a 3D Camera to work correctly. - Register the `ColorGrading` type because `bevy_scene` was complaining about it. |
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Alexander Raish
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96a1c6ce15 |
Add extras field to GltfNode (#6973)
# Objective In our project we parse `GltfNode` from `*.gltf` file, and we need extra properties information from Blender. Right now there is no way to get this properties from GltfNode (only through query when you spawn scene), so objective of this PR is to add extra properties to `GltfNode` ## Solution Store extra properties inside `Gltf` structs --- ## Changelog - Add pub field `extras` to `GltfNode`/`GltfMesh`/`GltfPrimitive` which store extras - Add pub field `material_extras` to `GltfPrimitive` which store material extras |
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xgbwei
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09cb590c57 |
Improve OrthographicCamera consistency and usability (#6201)
# Objective - Terminology used in field names and docs aren't accurate - `window_origin` doesn't have any effect when `scaling_mode` is `ScalingMode::None` - `left`, `right`, `bottom`, and `top` are set automatically unless `scaling_mode` is `None`. Fields that only sometimes give feedback are confusing. - `ScalingMode::WindowSize` has no arguments, which is inconsistent with other `ScalingMode`s. 1 pixel = 1 world unit is also typically way too wide. - `OrthographicProjection` feels generally less streamlined than its `PerspectiveProjection` counterpart - Fixes #5818 - Fixes #6190 ## Solution - Improve consistency in `OrthographicProjection`'s public fields (they should either always give feedback or never give feedback). - Improve consistency in `ScalingMode`'s arguments - General usability improvements - Improve accuracy of terminology: - "Window" should refer to the physical window on the desktop - "Viewport" should refer to the component in the window that images are drawn on (typically all of it) - "View frustum" should refer to the volume captured by the projection --- ## Changelog ### Added - Added argument to `ScalingMode::WindowSize` that specifies the number of pixels that equals one world unit. - Added documentation for fields and enums ### Changed - Renamed `window_origin` to `viewport_origin`, which now: - Affects all `ScalingMode`s - Takes a fraction of the viewport's width and height instead of an enum - Removed `WindowOrigin` enum as it's obsolete - Renamed `ScalingMode::None` to `ScalingMode::Fixed`, which now: - Takes arguments to specify the projection size - Replaced `left`, `right`, `bottom`, and `top` fields with a single `area: Rect` - `scale` is now applied before updating `area`. Reading from it will take `scale` into account. - Documentation changes to make terminology more accurate and consistent ## Migration Guide - Change `window_origin` to `viewport_origin`; replace `WindowOrigin::Center` with `Vec2::new(0.5, 0.5)` and `WindowOrigin::BottomLeft` with `Vec2::new(0.0, 0.0)` - For shadow projections and such, replace `left`, `right`, `bottom`, and `top` with `area: Rect::new(left, bottom, right, top)` - For camera projections, remove l/r/b/t values from `OrthographicProjection` instantiations, as they no longer have any effect in any `ScalingMode` - Change `ScalingMode::None` to `ScalingMode::Fixed` - Replace manual changes of l/r/b/t with: - Arguments in `ScalingMode::Fixed` to specify size - `viewport_origin` to specify offset - Change `ScalingMode::WindowSize` to `ScalingMode::WindowSize(1.0)` |
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ickk
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a0448eca2f |
enum Visibility component (#6320)
Consolidation of all the feedback about #6271 as well as the addition of an "unconditionally visible" mode. # Objective The current implementation of the `Visibility` struct simply wraps a boolean.. which seems like an odd pattern when rust has such nice enums that allow for more expression using pattern-matching. Additionally as it stands Bevy only has two settings for visibility of an entity: - "unconditionally hidden" `Visibility { is_visible: false }`, - "inherit visibility from parent" `Visibility { is_visible: true }` where a root level entity set to "inherit" is visible. Note that given the behaviour, the current naming of the inner field is a little deceptive or unclear. Using an enum for `Visibility` opens the door for adding an extra behaviour mode. This PR adds a new "unconditionally visible" mode, which causes an entity to be visible even if its Parent entity is hidden. There should not really be any performance cost to the addition of this new mode. -- The recently added `toggle` method is removed in this PR, as its semantics could be confusing with 3 variants. ## Solution Change the Visibility component into ```rust enum Visibility { Hidden, // unconditionally hidden Visible, // unconditionally visible Inherited, // inherit visibility from parent } ``` --- ## Changelog ### Changed `Visibility` is now an enum ## Migration Guide - evaluation of the `visibility.is_visible` field should now check for `visibility == Visibility::Inherited`. - setting the `visibility.is_visible` field should now directly set the value: `*visibility = Visibility::Inherited`. - usage of `Visibility::VISIBLE` or `Visibility::INVISIBLE` should now use `Visibility::Inherited` or `Visibility::Hidden` respectively. - `ComputedVisibility::INVISIBLE` and `SpatialBundle::VISIBLE_IDENTITY` have been renamed to `ComputedVisibility::HIDDEN` and `SpatialBundle::INHERITED_IDENTITY` respectively. Co-authored-by: Carter Anderson <mcanders1@gmail.com> |
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Pixelstorm
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89451226de |
Intepret glTF colors as linear instead of sRGB (#6828)
# Objective Fixes #6827 ## Solution Use the `Color::rgba_linear` function instead of the `Color::rgba` function to correctly interpret colors from glTF files in the linear color space rather than the incorrect sRGB color space |
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github-actions[bot]
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920543c824 |
Release 0.9.0 (#6568)
Preparing next release This PR has been auto-generated |
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Jakob Hellermann
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e71c4d2802 |
fix nightly clippy warnings (#6395)
# Objective
- fix new clippy lints before they get stable and break CI
## Solution
- run `clippy --fix` to auto-fix machine-applicable lints
- silence `clippy::should_implement_trait` for `fn HandleId::default<T: Asset>`
## Changes
- always prefer `format!("{inline}")` over `format!("{}", not_inline)`
- prefer `Box::default` (or `Box::<T>::default` if necessary) over `Box::new(T::default())`
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targrub
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c18b1a839b |
Prepare for upcoming rustlang by fixing upcoming clippy warnings (#6376)
# Objective - Proactive changing of code to comply with warnings generated by beta of rustlang version of cargo clippy. ## Solution - Code changed as recommended by `rustup update`, `rustup default beta`, `cargo run -p ci -- clippy`. - Tested using `beta` and `stable`. No clippy warnings in either after changes made. --- ## Changelog - Warnings fixed were: `clippy::explicit-auto-deref` (present in 11 files), `clippy::needless-borrow` (present in 2 files), and `clippy::only-used-in-recursion` (only 1 file). |
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Carter Anderson
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01aedc8431 |
Spawn now takes a Bundle (#6054)
# Objective Now that we can consolidate Bundles and Components under a single insert (thanks to #2975 and #6039), almost 100% of world spawns now look like `world.spawn().insert((Some, Tuple, Here))`. Spawning an entity without any components is an extremely uncommon pattern, so it makes sense to give spawn the "first class" ergonomic api. This consolidated api should be made consistent across all spawn apis (such as World and Commands). ## Solution All `spawn` apis (`World::spawn`, `Commands:;spawn`, `ChildBuilder::spawn`, and `WorldChildBuilder::spawn`) now accept a bundle as input: ```rust // before: commands .spawn() .insert((A, B, C)); world .spawn() .insert((A, B, C); // after commands.spawn((A, B, C)); world.spawn((A, B, C)); ``` All existing instances of `spawn_bundle` have been deprecated in favor of the new `spawn` api. A new `spawn_empty` has been added, replacing the old `spawn` api. By allowing `world.spawn(some_bundle)` to replace `world.spawn().insert(some_bundle)`, this opened the door to removing the initial entity allocation in the "empty" archetype / table done in `spawn()` (and subsequent move to the actual archetype in `.insert(some_bundle)`). This improves spawn performance by over 10%:  To take this measurement, I added a new `world_spawn` benchmark. Unfortunately, optimizing `Commands::spawn` is slightly less trivial, as Commands expose the Entity id of spawned entities prior to actually spawning. Doing the optimization would (naively) require assurances that the `spawn(some_bundle)` command is applied before all other commands involving the entity (which would not necessarily be true, if memory serves). Optimizing `Commands::spawn` this way does feel possible, but it will require careful thought (and maybe some additional checks), which deserves its own PR. For now, it has the same performance characteristics of the current `Commands::spawn_bundle` on main. **Note that 99% of this PR is simple renames and refactors. The only code that needs careful scrutiny is the new `World::spawn()` impl, which is relatively straightforward, but it has some new unsafe code (which re-uses battle tested BundlerSpawner code path).** --- ## Changelog - All `spawn` apis (`World::spawn`, `Commands:;spawn`, `ChildBuilder::spawn`, and `WorldChildBuilder::spawn`) now accept a bundle as input - All instances of `spawn_bundle` have been deprecated in favor of the new `spawn` api - World and Commands now have `spawn_empty()`, which is equivalent to the old `spawn()` behavior. ## Migration Guide ```rust // Old (0.8): commands .spawn() .insert_bundle((A, B, C)); // New (0.9) commands.spawn((A, B, C)); // Old (0.8): commands.spawn_bundle((A, B, C)); // New (0.9) commands.spawn((A, B, C)); // Old (0.8): let entity = commands.spawn().id(); // New (0.9) let entity = commands.spawn_empty().id(); // Old (0.8) let entity = world.spawn().id(); // New (0.9) let entity = world.spawn_empty(); ``` |
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Carter Anderson
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cd15f0f5be |
Accept Bundles for insert and remove. Deprecate insert/remove_bundle (#6039)
# Objective Take advantage of the "impl Bundle for Component" changes in #2975 / add the follow up changes discussed there. ## Solution - Change `insert` and `remove` to accept a Bundle instead of a Component (for both Commands and World) - Deprecate `insert_bundle`, `remove_bundle`, and `remove_bundle_intersection` - Add `remove_intersection` --- ## Changelog - Change `insert` and `remove` now accept a Bundle instead of a Component (for both Commands and World) - `insert_bundle` and `remove_bundle` are deprecated ## Migration Guide Replace `insert_bundle` with `insert`: ```rust // Old (0.8) commands.spawn().insert_bundle(SomeBundle::default()); // New (0.9) commands.spawn().insert(SomeBundle::default()); ``` Replace `remove_bundle` with `remove`: ```rust // Old (0.8) commands.entity(some_entity).remove_bundle::<SomeBundle>(); // New (0.9) commands.entity(some_entity).remove::<SomeBundle>(); ``` Replace `remove_bundle_intersection` with `remove_intersection`: ```rust // Old (0.8) world.entity_mut(some_entity).remove_bundle_intersection::<SomeBundle>(); // New (0.9) world.entity_mut(some_entity).remove_intersection::<SomeBundle>(); ``` Consider consolidating as many operations as possible to improve ergonomics and cut down on archetype moves: ```rust // Old (0.8) commands.spawn() .insert_bundle(SomeBundle::default()) .insert(SomeComponent); // New (0.9) - Option 1 commands.spawn().insert(( SomeBundle::default(), SomeComponent, )) // New (0.9) - Option 2 commands.spawn_bundle(( SomeBundle::default(), SomeComponent, )) ``` ## Next Steps Consider changing `spawn` to accept a bundle and deprecate `spawn_bundle`. |
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ira
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b42f426fc3 |
Add associated constant IDENTITY to Transform and friends. (#5340)
# Objective Since `identity` is a const fn that takes no arguments it seems logical to make it an associated constant. This is also more in line with types from glam (eg. `Quat::IDENTITY`). ## Migration Guide The method `identity()` on `Transform`, `GlobalTransform` and `TransformBundle` has been deprecated. Use the associated constant `IDENTITY` instead. Co-authored-by: devil-ira <justthecooldude@gmail.com> |
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github-actions[bot]
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444150025d |
Bump Version after Release (#5576)
Bump version after release This PR has been auto-generated |
