# Objective
Let `bevy_utils` build with no default features.
`cargo build -p bevy_utils --no-default-features` currently fails with
```
error[E0433]: failed to resolve: use of unresolved module or unlinked crate `alloc`
--> crates\bevy_utils\src\debug_info.rs:1:5
|
1 | use alloc::{borrow::Cow, fmt, string::String};
| ^^^^^ use of unresolved module or unlinked crate `alloc`
|
= help: add `extern crate alloc` to use the `alloc` crate
error[E0432]: unresolved import `alloc`
--> crates\bevy_utils\src\debug_info.rs:1:5
|
1 | use alloc::{borrow::Cow, fmt, string::String};
| ^^^^^ help: a similar path exists: `core::alloc`
```
I would have expected CI to catch this earlier, but I have not
investigated why it did not.
## Solution
Wrap the parts of `DebugName` that use `Cow` and `String` in
`cfg::alloc!`.
If the `debug` feature is enabled, then `DebugName` itself stores a
`Cow`, so make the `debug` feature require `bevy_platform/alloc`.
That is, you can use `DebugName` in no-std contexts when it's just a
ZST! (I bet it's even possible to support no-std `debug` by storing
`&'static str` instead of `Cow<'static, str>`, but that seemed like too
much complexity for now.)
# Objective
This PR introduces Bevy Feathers, an opinionated widget toolkit and
theming system intended for use by the Bevy Editor, World Inspector, and
other tools.
The `bevy_feathers` crate is incomplete and hidden behind an
experimental feature flag. The API is going to change significantly
before release.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
- MaterialProperties uses HashMap for some data that is generally going
to be really small. This is likely using more memory than necessary
## Solution
- Use a SmallVec instead
- I used the size a StandardMaterial would need for all the backing
arrays
## Testing
- Tested the 3d_scene to confirm it still works
## Notes
I'm not sure if it made a measurable difference since I'm not sure how
to measure this. It's a bit hard to create an artificial workflow where
this would be the main bottleneck. This is very in the realm of
microoptimization.
# Objective
*Step towards https://github.com/bevyengine/bevy/issues/19686*
We now have all the infrastructure in place to migrate Bevy's default
behavior when loading glTF files to respect their coordinate system.
Let's start migrating! For motivation, see the issue linked above
## Solution
- Introduce a feature flag called `gltf_convert_coordinates_default`
- Currently,`GltfPlugin::convert_coordinates` defaults to `false`
- If `gltf_convert_coordinates_default` is enabled,
`GltfPlugin::convert_coordinates` will default to `true`
- If `gltf_convert_coordinates_default` is not enabled *and*
`GltfPlugin::convert_coordinates` is false, we assume the user is
implicitly using the old behavior. Print a warning *once* in that case,
but only when a glTF was actually loaded
- A user can opt into the new behavior either
- Globally, by enabling `gltf_convert_coordinates_default` in their
`Cargo.toml`
- Globally, by enabling `GltfPlugin::convert_coordinates`
- Per asset, by enabling `GltfLoaderSettings::convert_coordinates`
- A user can explicitly opt out of the new behavior and silence the
warning by
- Enabling `gltf_convert_coordinates_default` in their `Cargo.toml` and
disabling `GltfPlugin::convert_coordinates`
- This PR also moves the existing release note into a migration guide
Note that I'm very open to change any features, mechanisms, warning
texts, etc. as needed :)
## Future Work
- This PR leaves all examples fully functional by not enabling this flag
internally yet. A followup PR will enable it as a `dev-dependency` and
migrate all of our examples involving glTFs to the new behavior.
- After 0.17 (and the RC before) lands, we'll gather feedback to see if
anything breaks or the suggested migration is inconvenient in some way
- If all goes well, we'll kill this flag and change the default of
`GltfPlugin::convert_coordinates` to `true` in 0.18
## Testing
- Ran examples with and without the flag
---------
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
Co-authored-by: AlephCubed <76791009+AlephCubed@users.noreply.github.com>
# Objective
Closes#18075
In order to enable a number of patterns for dynamic materials in the
engine, it's necessary to decouple the renderer from the `Material`
trait.
This opens the possibility for:
- Materials that aren't coupled to `AsBindGroup`.
- 2d using the underlying 3d bindless infrastructure.
- Dynamic materials that can change their layout at runtime.
- Materials that aren't even backed by a Rust struct at all.
## Solution
In short, remove all trait bounds from render world material systems and
resources. This means moving a bunch of stuff onto `MaterialProperties`
and engaging in some hacks to make specialization work. Rather than
storing the bind group data in `MaterialBindGroupAllocator`, right now
we're storing it in a closure on `MaterialProperties`. TBD if this has
bad performance characteristics.
## Benchmarks
- `many_cubes`:
`cargo run --example many_cubes --release --features=bevy/trace_tracy --
--vary-material-data-per-instance`:
- @DGriffin91's Caldera
`cargo run --release --features=bevy/trace_tracy -- --random-materials`
- @DGriffin91's Caldera with 20 unique material types (i.e.
`MaterialPlugin<M>`) and random materials per mesh
`cargo run --release --features=bevy/trace_tracy -- --random-materials`
### TODO
- We almost certainly lost some parallelization from removing the type
params that could be gained back from smarter iteration.
- Test all the things that could have broken.
- ~Fix meshlets~
## Showcase
See [the
example](https://github.com/bevyengine/bevy/pull/19667/files#diff-9d768cfe1c3aa81eff365d250d3cbe5a63e8df63e81dd85f64c3c3cd993f6d94)
for a custom material implemented without the use of the `Material`
trait and thus `AsBindGroup`.
---------
Co-authored-by: IceSentry <IceSentry@users.noreply.github.com>
Co-authored-by: IceSentry <c.giguere42@gmail.com>
# Objective
Opt-out for UI clipping, for motivation see issue #19821
## Solution
New zst component `OverrideClip`. A UI node entity with this component
will ignore any inherited clipping rect, so it will never get clipped
regardless of the `Overflow` settings of its ancestors.
#### Why use a marker component and not add a new variant to `Overflow`
instead?
A separate marker component allows users to set both `Overflow` and
`OverrideClip` on the same node.
## Testing
Run the `overflow` example with the `OverrideClip` component added to
the `ImagNode`s and you will see that clipping is disabled.
# Objective
- i think const exprs werent supported in naga when these were written,
and we've just stuck with that since then. they're supported now so lets
use them
## Solution
- do that thang
## Testing
- transparency_3d, transmission, ssr, 3d_scene, couple others. they all
look fine
# Objective
- add support for alternate zstd backend through `zstd` for faster
decompression
## Solution
- make existing `zstd` feature only specify that support is required,
disambiguate which backend to use via two other features `zstd_native`
and `zstd_rust`.
- Similar to the approach taken by #18411, but we keep current behavior
by defaulting to the rust implementation because its safer, and isolate
this change.
NOTE: the default feature-set may seem to not currently require `zstd`,
but it does, it is enabled transitively by the `tonemapping_luts`
feature, which is a default feature. Thus this does not add default
features.
## Testing
- Cargo clippy on both feature combinations
# Objective
Upgrade to `wgpu` version `25.0`.
Depends on https://github.com/bevyengine/naga_oil/pull/121
## Solution
### Problem
The biggest issue we face upgrading is the following requirement:
> To facilitate this change, there was an additional validation rule put
in place: if there is a binding array in a bind group, you may not use
dynamic offset buffers or uniform buffers in that bind group. This
requirement comes from vulkan rules on UpdateAfterBind descriptors.
This is a major difficulty for us, as there are a number of binding
arrays that are used in the view bind group. Note, this requirement does
not affect merely uniform buffors that use dynamic offset but the use of
*any* uniform in a bind group that also has a binding array.
### Attempted fixes
The easiest fix would be to change uniforms to be storage buffers
whenever binding arrays are in use:
```wgsl
#ifdef BINDING_ARRAYS_ARE_USED
@group(0) @binding(0) var<uniform> view: View;
@group(0) @binding(1) var<uniform> lights: types::Lights;
#else
@group(0) @binding(0) var<storage> view: array<View>;
@group(0) @binding(1) var<storage> lights: array<types::Lights>;
#endif
```
This requires passing the view index to the shader so that we know where
to index into the buffer:
```wgsl
struct PushConstants {
view_index: u32,
}
var<push_constant> push_constants: PushConstants;
```
Using push constants is no problem because binding arrays are only
usable on native anyway.
However, this greatly complicates the ability to access `view` in
shaders. For example:
```wgsl
#ifdef BINDING_ARRAYS_ARE_USED
mesh_view_bindings::view.view_from_world[0].z
#else
mesh_view_bindings::view[mesh_view_bindings::view_index].view_from_world[0].z
#endif
```
Using this approach would work but would have the effect of polluting
our shaders with ifdef spam basically *everywhere*.
Why not use a function? Unfortunately, the following is not valid wgsl
as it returns a binding directly from a function in the uniform path.
```wgsl
fn get_view() -> View {
#if BINDING_ARRAYS_ARE_USED
let view_index = push_constants.view_index;
let view = views[view_index];
#endif
return view;
}
```
This also poses problems for things like lights where we want to return
a ptr to the light data. Returning ptrs from wgsl functions isn't
allowed even if both bindings were buffers.
The next attempt was to simply use indexed buffers everywhere, in both
the binding array and non binding array path. This would be viable if
push constants were available everywhere to pass the view index, but
unfortunately they are not available on webgpu. This means either
passing the view index in a storage buffer (not ideal for such a small
amount of state) or using push constants sometimes and uniform buffers
only on webgpu. However, this kind of conditional layout infects
absolutely everything.
Even if we were to accept just using storage buffer for the view index,
there's also the additional problem that some dynamic offsets aren't
actually per-view but per-use of a setting on a camera, which would
require passing that uniform data on *every* camera regardless of
whether that rendering feature is being used, which is also gross.
As such, although it's gross, the simplest solution just to bump binding
arrays into `@group(1)` and all other bindings up one bind group. This
should still bring us under the device limit of 4 for most users.
### Next steps / looking towards the future
I'd like to avoid needing split our view bind group into multiple parts.
In the future, if `wgpu` were to add `@builtin(draw_index)`, we could
build a list of draw state in gpu processing and avoid the need for any
kind of state change at all (see
https://github.com/gfx-rs/wgpu/issues/6823). This would also provide
significantly more flexibility to handle things like offsets into other
arrays that may not be per-view.
### Testing
Tested a number of examples, there are probably more that are still
broken.
---------
Co-authored-by: François Mockers <mockersf@gmail.com>
Co-authored-by: Elabajaba <Elabajaba@users.noreply.github.com>
# Objective
- Fixes https://github.com/bevyengine/bevy/issues/14328
- `DynamicMap::drain` was broken (indices weren't cleared, causing a
panic when reading later)
- `PartialReflect::apply` was broken for maps and sets, because they
don't remove entries from the `self` map that aren't in the applied map.
- I discovered this bug when implementing MapEntities on a Component
containing a `HashMap<Entity, _>`. Because `apply` is used to reapply
the changes to the reflected map, the map ended up littered with a ton
of outdated entries.
## Solution
- Remove the separate `Vec` in `DynamicMap` and use the `HashTable`
directly, like it is in `DynamicSet`.
- Replace `MapIter` by `Box<dyn Iterator>` (like for `DynamicSet`), and
`Map::get_at` and `Map::get_at_mut` which are now unused.
- Now assume `DynamicMap` types are unordered and adjust documentation
accordingly.
- Fix documentation of `DynamicSet` (ordered -> unordered)
- Added `Map::retain` and `Set::retain`, and use them to remove excess
entries in `PartialReflect::apply` implementations.
## Testing
- Added `map::tests::apply` and `set::tests::apply` to validate
`<DynamicMap as PartialReflect>::apply` and `<DynamicSet as
PartialReflect>::apply`
# Objective
- Currently, CI tests take a screenshot at frame X and exits at frame Y
with X < Y, and both number fixed
- This means tests can take longer than they actually need when taking
the screenshot is fast, and can fail to take the screenshot when it's
taking too long
## Solution
- Add a new event `ScreenshotAndExit` that exit directly after the
screenshot is saved
# Objective
- Make follow-up changes from #18866
## Solution
- Switch from the on add observer to an on insert hook
- Make the component immutable
- Remove required components
## Testing
- `tilemap_chunk` example
# Objective
- Upstream mesh raycast UV support used in #19199
## Solution
- Compute UVs, debug a bunch of math issues with barycentric coordinates
and add docs.
## Testing
- Tested in diagetic UI in the linked PR.
Updates the requirements on
[derive_more](https://github.com/JelteF/derive_more) to permit the
latest version.
<details>
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<p><em>Sourced from <a
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<blockquote>
<h2>2.0.1</h2>
<p><a href="https://docs.rs/derive_more/2.0.1">API docs</a>
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<h3>Added</h3>
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<li>Add crate metadata for the Rust Playground. This makes sure that the
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Playground will have all <code>derive_more</code> features available
once
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<h2>2.0.0 - 2025-02-03</h2>
<h3>Breaking changes</h3>
<ul>
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(<a
href="https://redirect.github.com/JelteF/derive_more/pull/406">#406</a>)</li>
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href="https://redirect.github.com/JelteF/derive_more/pull/395">#395</a>)</li>
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<h3>Fixed</h3>
<ul>
<li>Associated types of type parameters not being treated as generics in
<code>Debug</code>
and <code>Display</code> expansions.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/399">#399</a>)</li>
<li><code>unreachable_code</code> warnings on generated code when
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(<a
href="https://redirect.github.com/JelteF/derive_more/pull/404">#404</a>)</li>
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<code>TryInto</code> or <code>FromStr</code>
with an associated item called <code>Error</code> or <code>Err</code>
respectively.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/410">#410</a>)</li>
<li>Top-level <code>#[display("...")]</code> attribute on an
enum being incorrectly treated
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(<a
href="https://redirect.github.com/JelteF/derive_more/pull/395">#395</a>)</li>
<li>Omitted raw identifiers in <code>Debug</code> and
<code>Display</code> expansions.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/431">#431</a>)</li>
<li>Incorrect rendering of raw identifiers as field names in
<code>Debug</code> expansions.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/431">#431</a>)</li>
<li>Top-level <code>#[display("...")]</code> attribute on an
enum not working transparently
for directly specified fields.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/438">#438</a>)</li>
<li>Incorrect dereferencing of unsized fields in <code>Debug</code> and
<code>Display</code> expansions.
(<a
href="https://redirect.github.com/JelteF/derive_more/pull/440">#440</a>)</li>
</ul>
<h2>0.99.19 - 2025-02-03</h2>
<ul>
<li>Add crate metadata for the Rust Playground.</li>
</ul>
<h2>1.0.0 - 2024-08-07</h2>
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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: François Mockers <francois.mockers@vleue.com>
# Objective
#19410 added support for resizing images "in place" meaning that their
data was copied into the new texture allocation on the CPU. However,
there are some scenarios where an image may be created and populated
entirely on the GPU. Using this method would cause data to disappear, as
it wouldn't be copied into the new texture.
## Solution
When an image is resized in place, if it has no data in it's asset,
we'll opt into a new flag `copy_on_resize` which will issue a
`copy_texture_to_texture` command on the old allocation.
To support this, we require passing the old asset to all `RenderAsset`
implementations. This will be generally useful in the future for
reducing things like buffer re-allocations.
## Testing
Tested using the example in the issue.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
- Remove a component impl footgun
- Make projection code slightly nicer, and remove the need to import the
projection trait when using the methods on `Projection`.
## Solution
- Do the things.
# Objective
- basis-universal feature is overloaded, you might not want the
compressed_image_saver but you may want basis-universal
## Solution
- split out compressed_image_saver
## Testing
- cargo clippy
# Objective
- Sometimes you only want to write parts of a buffer to the gpu instead
of reuploading the entire buffer. For example when doing data streaming.
- wgpu already supports this and you can do it manually from the user
side but it would be nice if it was built in.
## Solution
- Add `write_buffer_range()` to `RawBufferVec` and `BufferVec` that will
only upload the data contained in the specified range
## Testing
- I did not test it in bevy, but this implementation is copied from
something I used and tested at work
# Objective
- Alternative to and closes#19545
- Resolves#9790 by providing an alternative
- `Mesh` is meant as format optimized for the renderer. There are no
guarantees about how it looks, and breaking changes are expected
- This makes it not feasible to implement `Reflect` for all its fields
or `Serialize` it.
- However, (de)serializing a mesh has an important use case: send a mesh
over BRP to another process, like an editor!
- In my case, I'm making a navmesh editor and need to copy the level
that is running in the game into the editor process
- Assets don't solve this because
- They don't work over BRP #19709 and
- The meshes may be procedural
- So, we need a way to (de)serialize a mesh for short-term
transmissions.
## Solution
- Like `SerializedAnimationGraph` before, let's make a `SerializedMesh`!
- This type's fields are all `private` because we want to keep the
internals of `Mesh` hidden, and exposing them
through this secondary struct would be counter-productive to that
- All this struct can do is be serialized, be deserialized, and be
converted to and from a mesh
- It's not a lossless transmission: the handle for morph targets is
ignored, and things like the render usages make no sense to be
transmitted imo
## Future Work
The same song and dance needs to happen for `Image`, but I can live with
completely white meshes for the moment lol
## Testing
- Added a simple test
---------
Co-authored-by: atlv <email@atlasdostal.com>
# Objective
- Followup to https://github.com/bevyengine/bevy/pull/19633
- As discussed, it's a bit cumbersome to specify that you want the
correct orientation every single time
- Also, glTFs loaded from third parties will still be loaded incorrectly
## Solution
- Allow opting into the new behavior globally or per-asset
- Also improved some docs while on it :)
## Testing
- Ran the animation examples
- Ran the test scene from the last PR with all configuration
combinations
# Objective
Further tests after #19326 showed that configuring `EntityCloner` with
required components is bug prone and the current design has several
weaknesses in it's API:
- Mixing `EntityClonerBuilder::allow` and `EntityClonerBuilder::deny`
requires extra care how to support that which has an impact on
surrounding code that has to keep edge cases in mind. This is especially
true for attempts to fix the following issues. There is no use-case
known (to me) why someone would mix those.
- A builder with `EntityClonerBuilder::allow_all` configuration tries to
support required components like `EntityClonerBuilder::deny_all` does,
but the meaning of that is conflicting with how you'd expect things to
work:
- If all components should be cloned except component `A`, do you also
want to exclude required components of `A` too? Or are these also valid
without `A` at the target entity?
- If `EntityClonerBuilder::allow_all` should ignore required components
and not add them to be filtered away, which purpose has
`EntityClonerBuilder::without_required_components` for this cloner?
- Other bugs found with the linked PR are:
- Denying `A` also denies required components of `A` even when `A` does
not exist at the source entity
- Allowing `A` also allows required components of `A` even when `A` does
not exist at the source entity
- Adding `allow_if_new` filters to the cloner faces the same issues and
require a common solution to dealing with source-archetype sensitive
cloning
Alternative to #19632 and #19635.
# Solution
`EntityClonerBuilder` is made generic and split into
`EntityClonerBuilder<OptOut>` and `EntityClonerBuilder<OptIn>`
For an overview of the changes, see the migration guide. It is generally
a good idea to start a review of that.
## Algorithm
The generic of `EntityClonerBuilder` contains the filter data that is
needed to build and clone the entity components.
As the filter needs to be borrowed mutably for the duration of the
clone, the borrow checker forced me to separate the filter value and all
other fields in `EntityCloner`. The latter are now in the
`EntityClonerConfig` struct. This caused many changed LOC, sorry.
To make reviewing easier:
1. Check the migration guide
2. Many methods of `EntityCloner` now just call identitcal
`EntityClonerConfig` methods with a mutable borrow of the filter
3. Check `EntityClonerConfig::clone_entity_internal` which changed a bit
regarding the filter usage that is now trait powered (`CloneByFilter`)
to support `OptOut`, `OptIn` and `EntityClonerFilter` (an enum combining
the first two)
4. Check `OptOut` type that no longer tracks required components but has
a `insert_mode` field
5. Check `OptIn` type that has the most logic changes
# Testing
I added a bunch of tests that cover the new logic parts and the fixed
issues.
Benchmarks are in a comment a bit below which shows ~4% to 9%
regressions, but it varied wildly for me. For example at one run the
reflection-based clonings were on-par with main while the other are not,
and redoing that swapped the situation for both.
It would be really cool if I could get some hints how to get better
benchmark results or if you could run them on your machine too.
Just be aware this is not a Performance PR but a Bugfix PR, even if I
smuggled in some more functionalities. So doing changes to
`EntityClonerBuilder` is kind of required here which might make us bite
the bullet.
---------
Co-authored-by: eugineerd <70062110+eugineerd@users.noreply.github.com>
# Objective
- Related to #19024.
## Solution
- Remove the `FULLSCREEN_SHADER_HANDLE` `weak_handle` with a resource
holding the shader handle.
- This also changes us from using `load_internal_asset` to
`embedded_asset`/`load_embedded_asset`.
- All uses have been migrated to clone the `FullscreenShader` resource
and use its `to_vertex_state` method.
## Testing
- `anti_aliasing` example still works.
- `bloom_3d` example still works.
---------
Co-authored-by: charlotte 🌸 <charlotte.c.mcelwain@gmail.com>
# Objective
An attempt to start building a base for first-party tilemaps (#13782).
The objective is to create a very simple tilemap chunk rendering plugin
that can be used as a building block for 3rd-party tilemap crates, and
eventually a first-party tilemap implementation.
## Solution
- Introduces two user-facing components, `TilemapChunk` and
`TilemapChunkIndices`, and a new material `TilemapChunkMaterial`.
- `TilemapChunk` holds the chunk and tile sizes, and the tileset image
- The tileset image is expected to be a layered image for use with
`texture_2d_array`, with the assumption that atlases or multiple images
would go through an asset loader/processor. Not sure if that should be
part of this PR or not..
- `TilemapChunkIndices` holds a 1d representation of all of the tile's
Option<u32> index into the tileset image.
- Indices are fixed to the size of tiles in a chunk (though maybe this
should just be an assertion instead?)
- Indices are cloned and sent to the shader through a u32 texture.
## Testing
- Initial testing done with the `tilemap_chunk` example, though I need
to include some way to update indices as part of it.
- Tested wasm with webgl2 and webgpu
- I'm thinking it would probably be good to do some basic perf testing.
---
## Showcase
```rust
let chunk_size = UVec2::splat(64);
let tile_size = UVec2::splat(16);
let indices: Vec<Option<u32>> = (0..chunk_size.x * chunk_size.y)
.map(|_| rng.gen_range(0..5))
.map(|i| if i == 0 { None } else { Some(i - 1) })
.collect();
commands.spawn((
TilemapChunk {
chunk_size,
tile_size,
tileset,
},
TilemapChunkIndices(indices),
));
```
# Objective
- Notice a word duplication typo
- Small quest to fix similar or nearby typos with my faithful companion
`\b(\w+)\s+\1\b`
## Solution
Fix em
# Objective
The objective of this PR is to enable Components to use their
`MapEntities` implementation for `Component::map_entities`.
With the improvements to the entity mapping system, there is definitely
a huge reduction in boilerplate. However, especially since
`(Entity)HashMap<..>` doesn't implement `MapEntities` (I presume because
the lack of specialization in rust makes `HashMap<Entity|X, Entity|X>`
complicated), when somebody has types that contain these hashmaps they
can't use this approach.
More so, we can't even depend on the previous implementation, since
`Component::map_entities` is used instead of
`MapEntities::map_entities`. Outside of implementing `Component `and
`Component::map_entities` on these types directly, the only path forward
is to create a custom type to wrap the hashmaps and implement map
entities on that, or split these components into a wrapper type that
implement `Component`, and an inner type that implements `MapEntities`.
## Current Solution
The solution was to allow adding `#[component(map_entities)]` on the
component. By default this will defer to the `MapEntities`
implementation.
```rust
#[derive(Component)]
#[component(map_entities)]
struct Inventory {
items: HashMap<Entity, usize>
}
impl MapEntities for Inventory {
fn map_entities<M: EntityMapper>(&mut self, entity_mapper: &mut M) {
self.items = self.items
.drain()
.map(|(id, count)|(entity_mapper.get_mapped(id), count))
.collect();
}
}
```
You can use `#[component(map_entities = <function path>)]` instead to
substitute other code in for components. This function can also include
generics, but sso far I haven't been able to find a case where they are
needed.
```rust
#[derive(Component)]
#[component(map_entities = map_the_map)]
// Also works #[component(map_entities = map_the_map::<T,_>)]
struct Inventory<T> {
items: HashMap<Entity, T>
}
fn map_the_map<T, M: EntityMapper>(inv: &mut Inventory<T>, entity_mapper: &mut M) {
inv.items = inv.items
.drain()
.map(|(id, count)|(entity_mapper.get_mapped(id), count))
.collect();
}
```
The idea is that with the previous changes to MapEntities, MapEntities
is implemented more for entity collections than for Components. If you
have a component that makes sense as both, `#[component(map_entities)]`
would work great, while otherwise a component can use
`#[component(map_entities = <function>)]` to change the behavior of
`Component::map_entities` without opening up the component type to be
included in other components.
## (Original Solution if you want to follow the PR)
The solution was to allow adding `#[component(entities)]` on the
component itself to defer to the `MapEntities` implementation
```rust
#[derive(Component)]
#[component(entities)]
struct Inventory {
items: HashMap<Entity, usize>
}
impl MapEntities for Inventory {
fn map_entities<M: EntityMapper>(&mut self, entity_mapper: &mut M) {
self.items = self.items
.drain()
.map(|(id, count)|(entity_mapper.get_mapped(id), count))
.collect();
}
}
```
## Testing
I tested this by patching my local changes into my own bevy project. I
had a system that loads a scene file and executes some logic with a
Component that contains a `HashMap<Entity, UVec2>`, and it panics when
Entity is not found from another query. Since the 0.16 update this
system has reliably panicked upon attempting to the load the scene.
After patching my code in, I added `#[component(entities)]` to this
component, and I was able to successfully load the scene.
Additionally, I wrote a doc test.
## Call-outs
### Relationships
This overrules the default mapping of relationship fields. Anything else
seemed more problematic, as you'd have inconsistent behavior between
`MapEntities` and `Component`.
This is a bit of a test case in writing the
[explanation](https://bevyengine.org/learn/contribute/helping-out/explaining-examples/)
for an example whose subject (`DistanceFog` as a component on cameras)
is the focus, but isn't that complicated either. Not certain if this
could be an exception or something more common.
Putting the controls below the explanation, as they're more of a
fall-back for the on-screen info (also that's where they were before).
# Objective
- Start the realtime direct lighting work for bevy solari
## Solution
- Setup all the CPU-side code for the realtime lighting path (minus some
parts for the temporal reuse I haven't written yet)
- Implement RIS with 32 samples to choose a good random light
- Don't sample a disk for the directional light, just treat it as a
single point. This is faster and not much worse quality.
## Future
- Spatiotemporal reuse (ReSTIR DI)
- Denoiser (DLSS-RR)
- Light tile optimization for faster light selection
- Indirect lighting (ReSTIR GI)
## Testing
- Run the solari example to see realtime
- Run the solari example with `-- --pathtracer` to see the existing
pathtracer
---
## Showcase
1 frame direct lighting:
Accumulated pathtracer output:
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
While working on #17607, I found myself confused and frustrated by the
tangled web woven by the various modules inside of our observers code.
Rather than tackle that as part of a big rewrite PR, I've decided to do
the mature (if frustrating) thing where you split out your trivial but
noisy refactoring first.
There are a large number of moving parts, especially in terms of
storage, and these are strewn willy-nilly across the module with no
apparent ordering. To make matters worse, this was almost all just
dumped into a multi-thousand LOC mod.rs at the root.
## Solution
I've reshuffled the modules, attempting to:
- reduce the size of the mod.rs file
- organize structs so that smaller structs are found after the larger
structs that contain them
- group related functionality together
- document why modules exist, and their broad organization
No functional changes have been made here, although I've had to increase
the visibility of a few fields from private to pub(crate) or pub(super)
to keep things compiling.
During these changes, I've opted for the lazy private module, public
re-export strategy, to avoid causing any breakages, both within and
outside of `bevy` itself. I think we can do better, but I want to leave
that for a proper cleanup pass at the end. There's no sense maintaining
migration guides and forcing multiple breaking changes throughout the
cycle.
## Testing
No functional changes; relying on existing test suite and the Rust
compiler.
# Objective
Fix https://github.com/bevyengine/bevy/issues/19617
# Solution
Add newlines before all impl blocks.
I suspect that at least some of these will be objectionable! If there's
a desired Bevy style for this then I'll update the PR. If not then we
can just close it - it's the work of a single find and replace.
Bump version after release
This PR has been auto-generated
Fixes#19766
---------
Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: François Mockers <francois.mockers@vleue.com>
Co-authored-by: François Mockers <mockersf@gmail.com>
# Objective
There is a lot of `world.entities().len()`, especially in tests. In
tests, usually, the assumption is made that empty worlds do not contain
any entities. This is about to change (#19711), and as such all of these
tests are failing for that PR.
## Solution
`num_entities` is a convenience method that returns the number of
entities inside a world. It can later be adapted to exclude 'unexpected'
entities, associated with internal data structures such as Resources,
Queries, Systems. In general I argue for a separation of concepts where
`World` ignores internal entities in methods such as `iter_entities()`
and `clear_entities()`, that discussion is, however, separate from this
PR.
## Testing
I replaced most occurrences of `world.entities().len()` with
`world.num_entities()` and the tests passed.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
Some methods and commands carelessly overwrite `Relationship`
components. This may overwrite additional data stored at them which is
undesired.
Part of #19589
## Solution
A new private method will be used instead of insert:
`modify_or_insert_relation_with_relationship_hook_mode`.
This method behaves different to `insert` if `Relationship` is a larger
type than `Entity` and already contains this component. It will then use
the `modify_component` API and a new `Relationship::set_risky` method to
set the related entity, keeping all other data untouched.
For the `replace_related`(`_with_difference`) methods this also required
a `InsertHookMode` parameter for efficient modifications of multiple
children. The changes here are limited to the non-public methods.
I would appreciate feedback if this is all good.
# Testing
Added tests of all methods that previously could reset `Relationship`
data.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
I've noticed that some methods with `MaybeLocation::caller` don't have
`#[track_caller]` which resulted in wrong locations reported when
`track_location` is enabled.
## Solution
add `#[track_caller]` to them.
Click to focus is now a global observer.
# Objective
Previously, the "click to focus" behavior was implemented in each
individual headless widget, producing redundant logic.
## Solution
The new scheme is to have a global observer which looks for pointer down
events and triggers an `AcquireFocus` event on the target. This event
bubbles until it finds an entity with `TabIndex`, and then focuses it.
## Testing
Tested the changes using the various examples that have focusable
widgets. (This will become easier to test when I add focus ring support
to the examples, but that's for another day. For now you just have to
know which keys to press.)
## Migration
This change is backwards-compatible. People who want the new behavior
will need to install the new plugin.
