# Objective
- Fixes#11516
## Solution
- Add Animated Material example (colors are hue-cycling smoothly
per-mesh)
Note: this example reproduces the perf issue found in #10610 pretty
consistently, with and without the changes from that PR included. Frame
time is sometimes around 4.3ms, other times around 12-14ms. Its pretty
random per run. I think this clears #10610 for merge.
# Objective
- Some passes recreate a sampler when creating a bind group to be
cached, even if the sampler is always the same.
## Solution
- Store the sampler in the corresponding pipeline resource.
# Objective
While working on #11527 I spotted that the internal field for the label
of a `Schedule` is called `name`. Using `label` seems more in line with
the other naming across Bevy.
## Solution
Renaming the field was straightforward since it's not exposed outside of
the module. This also means a changelog or migration guide isn't
necessary.
# Objective
Theres no explaination for what the compiler flags
`config_fast_builds.toml` do
## Solution
Explain what the flags in `config_fast_builds.toml` do.
# Objective
Fixes#11411
## Solution
- Added a simple example how to create and configure custom schedules
that are run by the `Main` schedule.
- Spot checked some of the API docs used, fixed `App::add_schedule` docs
that referred to a function argument that was removed by #9600.
## Open Questions
- While spot checking the docs, I noticed that the `Schedule` label is
stored in a field called `name` instead of `label`. This seems
unintuitive since the term label is used everywhere else. Should we
change that field name? It was introduced in #9600. If so, I do think
this change would be out of scope for this PR that mainly adds the
example.
# Objective
Rust analyzer kept complaining about a cyclic dependency due to
`bevy_input` having a dev-dependency on `bevy`.
`bevy_input` was also missing `bevy_reflect`'s "smol_str" feature which
it needs to compile on its own.
Fixes#10256
## Solution
Remove the dev-dependency on `bevy` from `bevy_input` since it was only
used to reduce imports for 1 test and 3 doc examples by 1 line each, as
`bevy_input` already has dependencies on everything needed for those
tests and doctests to work.
Add `bevy_reflect`'s "smol_str" feature to `bevy_input`'s dependency
list as it needs it to actually compile.
# Objective
Fixes#10414.
That issue and its comments do a great job of laying out the case for
this.
## Solution
Added an optional `spatial_scale` field to `PlaybackSettings`, which
overrides the default value set on `AudioPlugin`.
## Changelog
- `AudioPlugin::spatial_scale` has been renamed to
`default_spatial_scale`.
- `SpatialScale` is no longer a resource and is wrapped by
`DefaultSpatialScale`.
- Added an optional `spatial_scale` to `PlaybackSettings`.
## Migration Guide
`AudioPlugin::spatial_scale` has been renamed to `default_spatial_scale`
and the default spatial scale can now be overridden on individual audio
sources with `PlaybackSettings::spatial_scale`.
If you were modifying or reading `SpatialScale` at run time, use
`DefaultSpatialScale` instead.
```rust
// before
app.add_plugins(DefaultPlugins.set(AudioPlugin {
spatial_scale: SpatialScale::new(AUDIO_SCALE),
..default()
}));
// after
app.add_plugins(DefaultPlugins.set(AudioPlugin {
default_spatial_scale: SpatialScale::new(AUDIO_SCALE),
..default()
}));
```
# Objective
TypeUuid is deprecated, remove it.
## Migration Guide
Convert any uses of `#[derive(TypeUuid)]` with `#[derive(TypePath]` for
more complex uses see the relevant
[documentation](https://docs.rs/bevy/latest/bevy/prelude/trait.TypePath.html)
for more information.
---------
Co-authored-by: ebola <dev@axiomatic>
# Objective
- Fixes a hurdle encountered when debugging a panic caused by the file
watcher loading a `.gitignore` file, which was hard to debug because
there was no file name in the report, only `asset paths must have
extensions`
## Solution
- Panic with a formatted message that includes the asset path, e.g.
`missing expected extension for asset path .gitignore`
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Doonv <58695417+doonv@users.noreply.github.com>
# Objective
Fixes#11503
## Solution
Use an empty set of args on the web.
## Discussion
Maybe in the future we could wrap this so that we can use query args on
the web or something, but this was the minimum changeset I could think
of to keep the functionality and make them not panic on the web.
# Objective
- Try to fix deploying docs in CI
- Alternative to https://github.com/bevyengine/bevy/pull/11502
## Solution
- The only issue I could find is the lock file with invalid permissions,
try to remove it
- upload action was doing permissions cleanup in v1, that was removed in
v2. we're now using v3
# Objective
It is unclear how to run Bevy's benchmarks
## Solution
Add a README to the benches, with documentation that tells you what the
benchmarks are, and how to run them.
---------
Co-authored-by: Rob Parrett <robparrett@gmail.com>
# Objective
Since #10339, the contrast in this example has been very low. While I
was in there, I made a few other tweaks to the style.
Alternative to #10102.
## Solution
- Increase brightness of inactive buttons for higher contrast on the new
clear color
- Combine `DEAD_COLOR` and `EXTENT_COLOR`. These were using the same
value, and combining them might make the intent a little clearer. (This
is the single color for "not the live zone.")
- Make the "stick buttons" slightly smaller, so it's a bit more obvious
that they are sitting inside of the default dead zone.
- Remove explicit text color -- it was the same as the default
- Add top-left margin to the text in the top left, and change the font
size to better match other examples with text in the corner.
## Screenshots
<details>
<summary>With Bevy's default dead / live zones.</summary>
Before / After
</details>
<details>
<summary>With Bevy's old dead / live zones. (with the upper live zone
boundary != 1.0)</summary>
Before / After
</details>
Updates the requirements on
[ruzstd](https://github.com/KillingSpark/zstd-rs) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/KillingSpark/zstd-rs/releases">ruzstd's
releases</a>.</em></p>
<blockquote>
<h2>Even better no_std</h2>
<p>Switching from thiserror to derive_more allows for no_std builds on
stable rust</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/KillingSpark/zstd-rs/blob/master/Changelog.md">ruzstd's
changelog</a>.</em></p>
<blockquote>
<h1>After 0.5.0</h1>
<ul>
<li>Make the hashing checksum optional (thanks to <a
href="https://github.com/tamird"><code>@tamird</code></a>)
<ul>
<li>breaking change as the public API changes based on features</li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="e620d2a856"><code>e620d2a</code></a>
Merge pull request <a
href="https://redirect.github.com/KillingSpark/zstd-rs/issues/50">#50</a>
from KillingSpark/remove_thiserror</li>
<li><a
href="9e9d204c63"><code>9e9d204</code></a>
make clippy happy</li>
<li><a
href="f4a6fc0cc1"><code>f4a6fc0</code></a>
bump the version, this is an incompatible change</li>
<li><a
href="64d65b5c4f"><code>64d65b5</code></a>
fix test compile...</li>
<li><a
href="07bbda98c8"><code>07bbda9</code></a>
remove the error_in_core feature and switch the io_nostd to use the
Display t...</li>
<li><a
href="e15eb1e568"><code>e15eb1e</code></a>
Merge pull request <a
href="https://redirect.github.com/KillingSpark/zstd-rs/issues/49">#49</a>
from tamird/clippy</li>
<li><a
href="92a3f2e6b2"><code>92a3f2e</code></a>
Avoid unnecessary cast</li>
<li><a
href="f588d5c362"><code>f588d5c</code></a>
Avoid slow zero-filling initialization</li>
<li><a
href="e79f09876f"><code>e79f098</code></a>
Avoid single-match expression</li>
<li><a
href="c75cc2fbb9"><code>c75cc2f</code></a>
Remove useless assertion</li>
<li>Additional commits viewable in <a
href="https://github.com/KillingSpark/zstd-rs/compare/v0.4.0...v0.5.0">compare
view</a></li>
</ul>
</details>
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# Objective
- `AssetPath` implements reflection, but is not registered as a type in
the plugin.
- Fixes#11481.
## Solution
- Register the `AssetPath` type when `AssetPlugin::build` is called.
---
## Changelog
- Registered `AssetPath` type for use in reflection.
# Objective
- `World::get_resource`'s comment on it's `unsafe` usage meant to say
"mutably" but instead said "immutably."
- Fixes#11430.
## Solution
- Replace "immutably" with "mutably."
# Objective
- Using the latest nightly for `miri` is generally desirable as we want
to catch regressions upstream or new problems quickly
- https://github.com/rust-lang/rust/pull/120123 should be merged now, so
it should work.
## Solution
- Revert #11421.
---------
Co-authored-by: François <mockersf@gmail.com>
Co-authored-by: Alice Cecile <alice.i.cecil@gmail.com>
# Objective
#10946 added bounding volume types and an `IntersectsVolume` trait, but
didn't actually implement intersections between bounding volumes.
This PR implements AABB-AABB, circle-circle / sphere-sphere, and
AABB-circle / AABB-sphere intersections.
## Solution
Implement `IntersectsVolume` for bounding volume pairs. I also added
`closest_point` methods to return the closest point on the surface /
inside of bounding volumes. This is used for AABB-circle / AABB-sphere
intersections.
---------
Co-authored-by: IQuick 143 <IQuick143cz@gmail.com>
# Objective
TextureAtlases are commonly used to drive animations described as a
consecutive range of indices. The current TextureAtlasBuilder uses the
AssetId of the image to determine the index of the texture in the
TextureAtlas. The AssetId of an Image Asset can change between runs.
The TextureAtlas exposes
[`get_texture_index`](https://docs.rs/bevy/latest/bevy/sprite/struct.TextureAtlas.html#method.get_texture_index)
to get the index from a given AssetId, but this needlessly complicates
the process of creating a simple TextureAtlas animation.
Fixes#2459
## Solution
- Use the (ordered) image_ids of the 'texture to place' vector to
retrieve the packed locations and compose the textures of the
TextureAtlas.
# Objective
- Fix a memory leak in the dynamic ECS example mentioned in #11459
## Solution
- Rather than allocate the memory manually instead store a collection of
`Vec` that will be dropped after it is used.
---
I must have misinterpreted `OwningPtr`s semantics when initially writing
this example. I believe we should be able to provide better APIs here
for inserting dynamic components that don't require the user to wrangle
so much unsafety. We have no other examples using `insert_by_ids` and
our only tests show it being used for 1 or 2 values with nested calls to
`OwningPtr::make` despite the function taking an iterator. Rust's type
system is quite restrictive here but we could at least let
`OwningPtr::new` take non u8 `NonNull`.
I also agree with #11459 that we should generally be trying to simplify
and clarify this example.
# Objective
It would be convenient to be able to call functions with `Commands` as a
parameter without having to move your own instance of `Commands`. Since
this struct is composed entirely of references, we can easily get an
owned instance of `Commands` by shortening the lifetime.
## Solution
Add `Commands::reborrow`, `EntiyCommands::reborrow`, and
`Deferred::reborrow`, which returns an owned version of themselves with
a shorter lifetime.
Remove unnecessary lifetimes from `EntityCommands`. The `'w` and `'s`
lifetimes only have to be separate for `Commands` because it's used as a
`SystemParam` -- this is not the case for `EntityCommands`.
---
## Changelog
Added `Commands::reborrow`. This is useful if you have `&mut Commands`
but need `Commands`. Also added `EntityCommands::reborrow` and
`Deferred:reborrow` which serve the same purpose.
## Migration Guide
The lifetimes for `EntityCommands` have been simplified.
```rust
// Before (Bevy 0.12)
struct MyStruct<'w, 's, 'a> {
commands: EntityCommands<'w, 's, 'a>,
}
// After (Bevy 0.13)
struct MyStruct<'a> {
commands: EntityCommands<'a>,
}
```
The method `EntityCommands::commands` now returns `Commands` rather than
`&mut Commands`.
```rust
// Before (Bevy 0.12)
let commands = entity_commands.commands();
commands.spawn(...);
// After (Bevy 0.13)
let mut commands = entity_commands.commands();
commands.spawn(...);
```
# Objective
Document a few common cases of which lifetime is required when using
SystemParam Derive
## Solution
Added a table in the doc comment
---------
Co-authored-by: laund <me@laund.moe>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
- Prep for https://github.com/bevyengine/bevy/pull/10164
- Make deferred_lighting_pass_id a ColorAttachment
- Correctly extract shadow view frusta so that the view uniforms get
populated
- Make some needed things public
- Misc formatting
# Objective
- Extend reflection to the standard library's `Wrapping` and
`Saturating` generic types.
This wasn't my use-case but someone in the discord was surprised that
this wasn't already done. I decided to make a PR because the other
`std::num` items were reflected and if there's a reason to exclude
`Wrapping` and `Saturating`, I am unaware of it.
## Solution
Trivial fix
---
## Changelog
Implemented `Reflect` for `Wrapping<T>` and `Saturating<T>` from
`std::num`.
Since #9907 the generation starts at `1` instead of `0` so
`Entity::to_bits` now returns `4294967296` (ie. `u32::MAX + 1`) as the
lowest number instead of `0`.
Without this change scene loading fails with this error message:
`ERROR bevy_asset::server: Failed to load asset
'scenes/load_scene_example.scn.ron' with asset loader
'bevy_scene::scene_loader::SceneLoader': Could not parse RON: 8:6:
Invalid generation bits`
# Objective
> Can anyone explain to me the reasoning of renaming all the types named
Query to Data. I'm talking about this PR
https://github.com/bevyengine/bevy/pull/10779 It doesn't make sense to
me that a bunch of types that are used to run queries aren't named Query
anymore. Like ViewQuery on the ViewNode is the type of the Query. I
don't really understand the point of the rename, it just seems like it
hides the fact that a query will run based on those types.
[@IceSentry](https://discord.com/channels/691052431525675048/692572690833473578/1184946251431694387)
## Solution
Revert several renames in #10779.
## Changelog
- `ViewNode::ViewData` is now `ViewNode::ViewQuery` again.
## Migration Guide
- This PR amends the migration guide in
https://github.com/bevyengine/bevy/pull/10779
---------
Co-authored-by: atlas dostal <rodol@rivalrebels.com>
# Objective
- Add the ability to describe storage texture bindings when deriving
`AsBindGroup`.
- This is especially valuable for the compute story of bevy which
deserves some extra love imo.
## Solution
- This add the ability to annotate struct fields with a
`#[storage_texture(0)]` annotation.
- Instead of adding specific option parsing for all the image formats
and access modes, I simply accept a token stream and defer checking to
see if the option is valid to the compiler. This still results in useful
and friendly errors and is free to maintain and always compatible with
wgpu changes.
---
## Changelog
- The `#[storage_texture(..)]` annotation is now accepted for fields of
`Handle<Image>` in structs that derive `AsBindGroup`.
- The game_of_life compute shader example has been updated to use
`AsBindGroup` together with `[storage_texture(..)]` to obtain the
`BindGroupLayout`.
## Migration Guide
# Objective
#8219 changed the target type of a `transmute` without changing the one
transmuting from ([see the relevant
diff](55e9ab7c92 (diff-11413fb2eeba97978379d325353d32aa76eefd0af0c8e9b50b7f394ddfda7a26R351-R355))),
making them incompatible. This PR fixes this by changing the initial
type to match the target one (modulo lifetimes).
## Solution
Change the type to be transmuted from to match the one transmuting into
(modulo lifetimes)
# Objective
- This PR makes it so that `ReflectSerialize` and `ReflectDeserialize`
traits are properly derived on `Name`. This avoids having the internal
hash “leak” into the serialization when using reflection.
## Solution
- Added a conditional derive for `ReflectDeserialize` and
`ReflectSerialize` via `#[cfg_attr()]`
---
## Changelog
- `Name` now implements `ReflectDeserialize` and `ReflectSerialize`
whenever the `serialize` feature is enabled.
# Objective
Fix weird visuals when drawing a gizmo with a non-normed normal.
Fixes#11401
## Solution
Just normalize right before we draw. Could do it when constructing the
builder but that seems less consistent.
## Changelog
- gizmos.circle normal is now a Direction3d instead of a Vec3.
## Migration Guide
- Pass a Direction3d for gizmos.circle normal, eg.
`Direction3d::new(vec).unwrap_or(default)` or potentially
`Direction3d::new_unchecked(vec)` if you know your vec is definitely
normalized.
# Objective
- Since #11218, example `asset_processing` fails:
```
thread 'main' panicked at crates/bevy_asset/src/io/source.rs:489:18:
Failed to create file watcher: Error { kind: PathNotFound, paths: ["examples/asset/processing/imported_assets/Default"] }
```
start from a fresh git clone or delete the folder before running to
reproduce, it is in gitignore and should not be present on a fresh run
a657478675/.gitignore (L18)
## Solution
- Auto create the `imported_assets` folder if it is configured
---------
Co-authored-by: Kyle <37520732+nvdaz@users.noreply.github.com>
# Objective
`Direction2d::from_normalized` & `Direction3d::from_normalized` don't
emphasize that importance of the vector being normalized enough.
## Solution
Rename `from_normalized` to `new_unchecked` and add more documentation.
---
`Direction2d` and `Direction3d` were added somewhat recently in
https://github.com/bevyengine/bevy/pull/10466 (after 0.12), so I don't
think documenting the changelog and migration guide is necessary (Since
there is no major previous version to migrate from).
But here it is anyway in case it's needed:
## Changelog
- Renamed `Direction2d::from_normalized` and
`Direction3d::from_normalized` to `new_unchecked`.
## Migration Guide
- Renamed `Direction2d::from_normalized` and
`Direction3d::from_normalized` to `new_unchecked`.
---------
Co-authored-by: Tristan Guichaoua <33934311+tguichaoua@users.noreply.github.com>
Co-authored-by: Joona Aalto <jondolf.dev@gmail.com>
# Objective
Currently, the `primitives` module is inside of the prelude for
`bevy_math`, but the actual primitives are not. This requires either
importing the shapes everywhere that uses them, or adding the
`primitives::` prefix:
```rust
let rectangle = meshes.add(primitives::Rectangle::new(5.0, 2.5));
```
(Note: meshing isn't actually implemented yet, but it's in #11431)
The primitives are meant to be used for a variety of tasks across
several crates, like for meshing, bounding volumes, gizmos, colliders,
and so on, so I think having them in the prelude is justified. It would
make several common tasks a lot more ergonomic.
```rust
let rectangle = meshes.add(Rectangle::new(5.0, 2.5));
```
## Solution
Add `primitives::*` to `bevy_math::prelude`.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
Currently, the only way to create an AABB is to specify its `min` and
`max` coordinates. However, it's often more useful to use the center and
half-size instead.
## Solution
Add `new` constructors for `Aabb2d` and `Aabb3d`.
This:
```rust
let aabb = Aabb3d {
min: center - half_size,
max: center + half_size,
}
```
becomes this:
```rust
let aabb = Aabb3d::new(center, half_size);
```
I also made the usage of "half-extents" vs. "half-size" a bit more
consistent.
# Objective
- Since https://github.com/bevyengine/bevy/pull/11366, feature `glsl` of
`naga_oil` is not enabled by default
- It is needed for example `shader_material_glsl`
```
thread 'Compute Task Pool (0)' panicked at crates\bevy_render\src\render_resource\shader.rs:238:35:
GLSL is not supported in this configuration; use the feature `shader_format_glsl`
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Encountered a panic in system `bevy_render::render_resource::pipeline_cache::PipelineCache::process_pipeline_queue_system`!
thread 'main' panicked at crates\bevy_render\src\pipelined_rendering.rs:145:45:
called `Result::unwrap()` on an `Err` value: RecvError
```
## Solution
- Add feature `shader_format_glsl` as a required feature for example
`shader_material_glsl`
# Objective
Currently, the `Ellipse` primitive is represented by a `half_width` and
`half_height`. To improve consistency (similarly to #11434), it might
make more sense to use a `Vec2` `half_size` instead.
Alternatively, to make the elliptical nature clearer, the properties
could also be called `radius_x` and `radius_y`.
Secondly, `Ellipse::new` currently takes a *full* width and height
instead of two radii. I would expect it to take the half-width and
half-height because ellipses and circles are almost always defined using
radii. I wouldn't expect `Circle::new` to take a diameter (if we had
that method).
## Solution
Change `Ellipse` to store a `half_size` and `new` to take the half-width
and half-height.
I also added a `from_size` method similar to `Rectangle::from_size`, and
added the `semi_minor` and `semi_major` helpers to get the
semi-minor/major radius.
# Objective
The `Rectangle` and `Cuboid` primitives currently use different
representations:
```rust
pub struct Rectangle {
/// The half width of the rectangle
pub half_width: f32,
/// The half height of the rectangle
pub half_height: f32,
}
pub struct Cuboid {
/// Half of the width, height and depth of the cuboid
pub half_extents: Vec3,
}
```
The property names and helpers are also inconsistent. `Cuboid` has
`half_extents`, but it also has a method called `from_size`. Most
existing code also uses "size" instead of "extents".
## Solution
Represent both `Rectangle` and `Cuboid` with `half_size` properties.
# Objective
Implements #9216
## Solution
- Replace `DiagnosticId` by `DiagnosticPath`. It's pre-hashed using
`const-fnv1a-hash` crate, so it's possible to create path in const
contexts.
---
## Changelog
- Replaced `DiagnosticId` by `DiagnosticPath`
- Set default history length to 120 measurements (2 seconds on 60 fps).
I've noticed hardcoded constant 20 everywhere and decided to change it
to `DEFAULT_MAX_HISTORY_LENGTH` , which is set to new diagnostics by
default. To override it, use `with_max_history_length`.
## Migration Guide
```diff
- const UNIQUE_DIAG_ID: DiagnosticId = DiagnosticId::from_u128(42);
+ const UNIQUE_DIAG_PATH: DiagnosticPath = DiagnosticPath::const_new("foo/bar");
- Diagnostic::new(UNIQUE_DIAG_ID, "example", 10)
+ Diagnostic::new(UNIQUE_DIAG_PATH).with_max_history_length(10)
- diagnostics.add_measurement(UNIQUE_DIAG_ID, || 42);
+ diagnostics.add_measurement(&UNIQUE_DIAG_ID, || 42);
```
# Objective
- since #9685 ,bevy introduce automatic batching of draw commands,
- `batch_and_prepare_render_phase` take the responsibility for batching
`phaseItem`,
- `GetBatchData` trait is used for indentify each phaseitem how to
batch. it defines a associated type `Data `used for Query to fetch data
from world.
- however,the impl of `GetBatchData ` in bevy always set ` type
Data=Entity` then we acually get following code
`let entity:Entity =query.get(item.entity())` that cause unnecessary
overhead .
## Solution
- remove associated type `Data ` and `Filter` from `GetBatchData `,
- change the type of the `query_item ` parameter in get_batch_data from`
Self::Data` to `Entity`.
- `batch_and_prepare_render_phase ` no longer takes a query using
`F::Data, F::Filter`
- `get_batch_data `now returns `Option<(Self::BufferData,
Option<Self::CompareData>)>`
---
## Performance
based in main merged with #11290
Window 11 ,Intel 13400kf, NV 4070Ti
frame time from 3.34ms to 3 ms, ~ 10%
`batch_and_prepare_render_phase` from 800us ~ 400 us
## Migration Guide
trait `GetBatchData` no longer hold associated type `Data `and `Filter`
`get_batch_data` `query_item `type from `Self::Data` to `Entity` and
return `Option<(Self::BufferData, Option<Self::CompareData>)>`
`batch_and_prepare_render_phase` should not have a query
# Objective
- `actions/upload-pages-artifact` and `actions/deploy-pages` are
outdated.
- Alternative to #11253 and #11252.
## Solution
- Bump the version of both actions.
---
There appear to be no user-facing changes. They just both need to be
updated together. (The `actions: read` permission was a bug that was
fixed later.)
# Objective
Adjust bevy internals to utilize `Option<Res<State<S>>>` instead of
`Res<State<S>>`, to allow for adding/removing states at runtime and
avoid unexpected panics.
As requested here:
https://github.com/bevyengine/bevy/pull/10088#issuecomment-1869185413
---
## Changelog
- Changed the use of `world.resource`/`world.resource_mut` to
`world.get_resource`/`world.get_resource_mut` in the
`run_enter_schedule` and `apply_state_transition` systems and handled
the `None` option.
- `in_state` now returns a ` FnMut(Option<Res<State<S>>>) -> bool +
Clone`, returning `false` if the resource doesn't exist.
- `state_exists_and_equals` was marked as deprecated, and now just runs
and returns `in_state`, since their bevhaviour is now identical
- `state_changed` now takes an `Option<Res<State<S>>>` and returns
`false` if it does not exist.
I would like to remove `state_exists_and_equals` fully, but wanted to
ensure that is acceptable before doing so.
---------
Co-authored-by: Mike <mike.hsu@gmail.com>
# Objective
- `FromType<T>` for `ReflectComponent` and `ReflectBundle` currently
require `T: FromWorld` for two reasons:
- they include a `from_world` method;
- they create dummy `T`s using `FromWorld` and then `apply` a `&dyn
Reflect` to it to simulate `FromReflect`.
- However `FromWorld`/`Default` may be difficult/weird/impractical to
implement, while `FromReflect` is easier and also more natural for the
job.
- See also
https://discord.com/channels/691052431525675048/1146022009554337792
## Solution
- Split `from_world` from `ReflectComponent` and `ReflectBundle` into
its own `ReflectFromWorld` struct.
- Replace the requirement on `FromWorld` in `ReflectComponent` and
`ReflectBundle` with `FromReflect`
---
## Changelog
- `ReflectComponent` and `ReflectBundle` no longer offer a `from_world`
method.
- `ReflectComponent` and `ReflectBundle`'s `FromType<T>` implementation
no longer requires `T: FromWorld`, but now requires `FromReflect`.
- `ReflectComponent::insert`, `ReflectComponent::apply_or_insert` and
`ReflectComponent::copy` now take an extra `&TypeRegistry` parameter.
- There is now a new `ReflectFromWorld` struct.
## Migration Guide
- Existing uses of `ReflectComponent::from_world` and
`ReflectBundle::from_world` will have to be changed to
`ReflectFromWorld::from_world`.
- Users of `#[reflect(Component)]` and `#[reflect(Bundle)]` will need to
also implement/derive `FromReflect`.
- Users of `#[reflect(Component)]` and `#[reflect(Bundle)]` may now want
to also add `FromWorld` to the list of reflected traits in case their
`FromReflect` implementation may fail.
- Users of `ReflectComponent` will now need to pass a `&TypeRegistry` to
its `insert`, `apply_or_insert` and `copy` methods.
This pull request re-submits #10057, which was backed out for breaking
macOS, iOS, and Android. I've tested this version on macOS and Android
and on the iOS simulator.
# Objective
This pull request implements *reflection probes*, which generalize
environment maps to allow for multiple environment maps in the same
scene, each of which has an axis-aligned bounding box. This is a
standard feature of physically-based renderers and was inspired by [the
corresponding feature in Blender's Eevee renderer].
## Solution
This is a minimal implementation of reflection probes that allows
artists to define cuboid bounding regions associated with environment
maps. For every view, on every frame, a system builds up a list of the
nearest 4 reflection probes that are within the view's frustum and
supplies that list to the shader. The PBR fragment shader searches
through the list, finds the first containing reflection probe, and uses
it for indirect lighting, falling back to the view's environment map if
none is found. Both forward and deferred renderers are fully supported.
A reflection probe is an entity with a pair of components, *LightProbe*
and *EnvironmentMapLight* (as well as the standard *SpatialBundle*, to
position it in the world). The *LightProbe* component (along with the
*Transform*) defines the bounding region, while the
*EnvironmentMapLight* component specifies the associated diffuse and
specular cubemaps.
A frequent question is "why two components instead of just one?" The
advantages of this setup are:
1. It's readily extensible to other types of light probes, in particular
*irradiance volumes* (also known as ambient cubes or voxel global
illumination), which use the same approach of bounding cuboids. With a
single component that applies to both reflection probes and irradiance
volumes, we can share the logic that implements falloff and blending
between multiple light probes between both of those features.
2. It reduces duplication between the existing *EnvironmentMapLight* and
these new reflection probes. Systems can treat environment maps attached
to cameras the same way they treat environment maps applied to
reflection probes if they wish.
Internally, we gather up all environment maps in the scene and place
them in a cubemap array. At present, this means that all environment
maps must have the same size, mipmap count, and texture format. A
warning is emitted if this restriction is violated. We could potentially
relax this in the future as part of the automatic mipmap generation
work, which could easily do texture format conversion as part of its
preprocessing.
An easy way to generate reflection probe cubemaps is to bake them in
Blender and use the `export-blender-gi` tool that's part of the
[`bevy-baked-gi`] project. This tool takes a `.blend` file containing
baked cubemaps as input and exports cubemap images, pre-filtered with an
embedded fork of the [glTF IBL Sampler], alongside a corresponding
`.scn.ron` file that the scene spawner can use to recreate the
reflection probes.
Note that this is intentionally a minimal implementation, to aid
reviewability. Known issues are:
* Reflection probes are basically unsupported on WebGL 2, because WebGL
2 has no cubemap arrays. (Strictly speaking, you can have precisely one
reflection probe in the scene if you have no other cubemaps anywhere,
but this isn't very useful.)
* Reflection probes have no falloff, so reflections will abruptly change
when objects move from one bounding region to another.
* As mentioned before, all cubemaps in the world of a given type
(diffuse or specular) must have the same size, format, and mipmap count.
Future work includes:
* Blending between multiple reflection probes.
* A falloff/fade-out region so that reflected objects disappear
gradually instead of vanishing all at once.
* Irradiance volumes for voxel-based global illumination. This should
reuse much of the reflection probe logic, as they're both GI techniques
based on cuboid bounding regions.
* Support for WebGL 2, by breaking batches when reflection probes are
used.
These issues notwithstanding, I think it's best to land this with
roughly the current set of functionality, because this patch is useful
as is and adding everything above would make the pull request
significantly larger and harder to review.
---
## Changelog
### Added
* A new *LightProbe* component is available that specifies a bounding
region that an *EnvironmentMapLight* applies to. The combination of a
*LightProbe* and an *EnvironmentMapLight* offers *reflection probe*
functionality similar to that available in other engines.
[the corresponding feature in Blender's Eevee renderer]:
https://docs.blender.org/manual/en/latest/render/eevee/light_probes/reflection_cubemaps.html
[`bevy-baked-gi`]: https://github.com/pcwalton/bevy-baked-gi
[glTF IBL Sampler]: https://github.com/KhronosGroup/glTF-IBL-Sampler
