# Objective
- Another step towards #15558
## Solution
- Instead of allocating a Vec and then having wgpu copy it into a
staging buffer, write directly into the staging buffer.
- gets rid of another hidden copy, in `pad_to_alignment`.
future work:
- why is there a gcd implementation in here (and its subpar, use
binary_gcd. its in the hot path, run twice for every mesh, every frame i
think?) make it better and put it in bevy_math
- zero-copy custom mesh api to avoid having to write out a Mesh from a
custom rep
## Testing
- lighting and many_cubes run fine (and slightly faster. havent
benchmarked though)
---
## Showcase
- look ma... no copies
at least when RenderAssetUsage is GPU only :3
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Kristoffer Søholm <k.soeholm@gmail.com>
# Objective
- Contributes to #15460
## Solution
- Made `web-time` a `wasm32`-only dependency.
- Moved time-related exports to its own module for clarity.
- Feature-gated allocator requirements for `hashbrown` behind `alloc`.
- Enabled compile-time RNG for `ahash` (runtime RNG will preferentially
used in `std` environments)
- Made `thread_local` optional by feature-gating the `Parallel` type.
## Testing
- Ran CI locally.
- `cargo build -p bevy_utils --target "x86_64-unknown-none"
--no-default-features`
## Solution
- Removed superfluous `Pickable` components
- Slightly simplified the code for updating the text color
- Removed the `Pointer<Click>` observer from the mesh entirely since
that doesn't support picking yet
# Objective
Someone (let's not name names here) might've been a bit of a goofball,
and happened to forget that "playing audio" should cause this thing
called "sound" to be emitted! That someone might not have realized that
queries should be updated to account for audio using wrapper components
instead of raw asset handles after #15573.
## Solution
Update systems, and listen to the relaxing soundscapes of `Windless
Slopes.ogg` 🎵
# Objective
Allow required component default values to be provided in-line.
```rust
#[derive(Component)]
#[require(
FocusPolicy(block_focus_policy)
)]
struct SomeComponent;
fn block_focus_policy() -> FocusPolicy {
FocusPolicy::Block
}
```
May now be expressed as:
```rust
#[derive(Component)]
#[require(
FocusPolicy(|| FocusPolicy::Block)
)]
struct SomeComponent;
```
## Solution
Modified the #[require] proc macro to accept a closure.
## Testing
Tested using my branch as a dependency, and switching between the inline
closure syntax and function syntax for a bunch of different components.
## Objective
The new Required Components feature (#14791) in Bevy allows spawning a
fixed set of components with a single method with cool require macro.
However, there's currently no corresponding method to remove all those
components together. This makes it challenging to keep insertion and
removal code in sync, especially for simple using cases.
```rust
#[derive(Component)]
#[require(Y)]
struct X;
#[derive(Component, Default)]
struct Y;
world.entity_mut(e).insert(X); // Spawns both X and Y
world.entity_mut(e).remove::<X>();
world.entity_mut(e).remove::<Y>(); // We need to manually remove dependencies without any sync with the `require` macro
```
## Solution
Simplifies component management by providing operations for removal
required components.
This PR introduces simple 'footgun' methods to removes all components of
this bundle and its required components.
Two new methods are introduced:
For Commands:
```rust
commands.entity(e).remove_with_requires::<B>();
```
For World:
```rust
world.entity_mut(e).remove_with_requires::<B>();
```
For performance I created new field in Bundels struct. This new field
"contributed_bundle_ids" contains cached ids for dynamic bundles
constructed from bundle_info.cintributed_components()
## Testing
The PR includes three test cases:
1. Removing a single component with requirements using World.
2. Removing a bundle with requirements using World.
3. Removing a single component with requirements using Commands.
4. Removing a single component with **runtime** requirements using
Commands
These tests ensure the feature works as expected across different
scenarios.
## Showcase
Example:
```rust
use bevy_ecs::prelude::*;
#[derive(Component)]
#[require(Y)]
struct X;
#[derive(Component, Default)]
#[require(Z)]
struct Y;
#[derive(Component, Default)]
struct Z;
#[derive(Component)]
struct W;
let mut world = World::new();
// Spawn an entity with X, Y, Z, and W components
let entity = world.spawn((X, W)).id();
assert!(world.entity(entity).contains::<X>());
assert!(world.entity(entity).contains::<Y>());
assert!(world.entity(entity).contains::<Z>());
assert!(world.entity(entity).contains::<W>());
// Remove X and required components Y, Z
world.entity_mut(entity).remove_with_requires::<X>();
assert!(!world.entity(entity).contains::<X>());
assert!(!world.entity(entity).contains::<Y>());
assert!(!world.entity(entity).contains::<Z>());
assert!(world.entity(entity).contains::<W>());
```
## Motivation for PR
#15580
## Performance
I made simple benchmark
```rust
let mut world = World::default();
let entity = world.spawn_empty().id();
let steps = 100_000_000;
let start = std::time::Instant::now();
for _ in 0..steps {
world.entity_mut(entity).insert(X);
world.entity_mut(entity).remove::<(X, Y, Z, W)>();
}
let end = std::time::Instant::now();
println!("normal remove: {:?} ", (end - start).as_secs_f32());
println!("one remove: {:?} micros", (end - start).as_secs_f64() / steps as f64 * 1_000_000.0);
let start = std::time::Instant::now();
for _ in 0..steps {
world.entity_mut(entity).insert(X);
world.entity_mut(entity).remove_with_requires::<X>();
}
let end = std::time::Instant::now();
println!("remove_with_requires: {:?} ", (end - start).as_secs_f32());
println!("one remove_with_requires: {:?} micros", (end - start).as_secs_f64() / steps as f64 * 1_000_000.0);
```
Output:
CPU: Amd Ryzen 7 2700x
```bash
normal remove: 17.36135
one remove: 0.17361348299999999 micros
remove_with_requires: 17.534006
one remove_with_requires: 0.17534005400000002 micros
```
NOTE: I didn't find any tests or mechanism in the repository to update
BundleInfo after creating new runtime requirements with an existing
BundleInfo. So this PR also does not contain such logic.
## Future work (outside this PR)
Create cache system for fast removing components in "safe" mode, where
"safe" mode is remove only required components that will be no longer
required after removing root component.
---------
Co-authored-by: a.yamaev <a.yamaev@smartengines.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
# Objective
> Alice 🌹 — Today at 3:43 PM
bevy_dev_tools::ci_testing::systems::send_events
This system should be marked as ambiguous with everything I think
## Solution
- Mark it as `ambiguous_with_all`
# Objective
Currently, sample-interpolated curves (such as those used by the glTF
loader for animations) do unnecessary extra work when `sample_clamped`
is called, since their implementations of `sample_unchecked` are already
clamped. Eliminating this redundant sampling is a small, easy
performance win which doesn't compromise on the animation system's
internal usage of `sample_clamped`, which guarantees that it never
samples curves out-of-bounds.
## Solution
For sample-interpolated curves, define `sample_clamped` in the way
`sample_unchecked` is currently defined, and then redirect
`sample_unchecked` to `sample_clamped`. This is arguably a more
idiomatic way of using the `cores` as well, which is nice.
## Testing
Ran `many_foxes` to make sure I didn't break anything.
# Objective
Support accessing dynamic resources in a dynamic system, including
accessing them by component id. This is similar to how dynamic
components can be queried using `Query<FilteredEntityMut>`.
## Solution
Create `FilteredResources` and `FilteredResourcesMut` types that act
similar to `FilteredEntityRef` and `FilteredEntityMut` and that can be
used as system parameters.
## Example
```rust
// Use `FilteredResourcesParamBuilder` to declare access to resources.
let system = (FilteredResourcesParamBuilder::new(|builder| {
builder.add_read::<B>().add_read::<C>();
}),)
.build_state(&mut world)
.build_system(resource_system);
world.init_resource::<A>();
world.init_resource::<C>();
fn resource_system(res: FilteredResources) {
// The resource exists, but we have no access, so we can't read it.
assert!(res.get::<A>().is_none());
// The resource doesn't exist, so we can't read it.
assert!(res.get::<B>().is_none());
// The resource exists and we have access, so we can read it.
let c = res.get::<C>().unwrap();
// The type parameter can be left out if it can be determined from use.
let c: Res<C> = res.get().unwrap();
}
```
## Future Work
As a follow-up PR, `ReflectResource` can be modified to take `impl
Into<FilteredResources>`, similar to how `ReflectComponent` takes `impl
Into<FilteredEntityRef>`. That will allow dynamic resources to be
accessed using reflection.
# Objective
The current observers have some unfortunate footguns where you can end
up confused about what is actually being observed. For apps you can
chain observe like `app.observe(..).observe(..)` which works like you
would expect, but if you try the same with world the first `observe()`
will return the `EntityWorldMut` for the created observer, and the
second `observe()` will only observe on the observer entity. It took
several hours for multiple people on discord to figure this out, which
is not a great experience.
## Solution
Rename `observe` on entities to `observe_entity`. It's slightly more
verbose when you know you have an entity, but it feels right to me that
observers for specific things have more specific naming, and it prevents
this issue completely.
Another possible solution would be to unify `observe` on `App` and
`World` to have the same kind of return type, but I'm not sure exactly
what that would look like.
## Testing
Simple name change, so only concern is docs really.
---
## Migration Guide
The `observe()` method on entities has been renamed to
`observe_entity()` to prevent confusion about what is being observed in
some cases.
# Objective
Fixes#14511.
`despawn` allows you to remove entities from the world. However, if the
entity does not exist, it emits a warning. This may not be intended
behavior for many users who have use cases where they need to call
`despawn` regardless of if the entity actually exists (see the issue),
or don't care in general if the entity already doesn't exist.
(Also trying to gauge interest on if this feature makes sense, I'd
personally love to have it, but I could see arguments that this might be
a footgun. Just trying to help here 😄 If there's no contention I could
also implement this for `despawn_recursive` and `despawn_descendants` in
the same PR)
## Solution
Add `try_despawn`, `try_despawn_recursive` and
`try_despawn_descendants`.
Modify `World::despawn_with_caller` to also take in a `warn` boolean
argument, which is then considered when logging the warning. Set
`log_warning` to `true` in the case of `despawn`, and `false` in the
case of `try_despawn`.
## Testing
Ran `cargo run -p ci` on macOS, it seemed fine.
# Objective
Add despawn and despawn_recursive benchmarks in a similar vein to the
spawn benchmark.
## Testing
Ran `cargo bench` from `benches` and it compiled fine.
On my machine:
```
despawn_world/1_entities
time: [3.1495 ns 3.1574 ns 3.1652 ns]
Found 4 outliers among 100 measurements (4.00%)
3 (3.00%) high mild
1 (1.00%) high severe
despawn_world/10_entities
time: [28.629 ns 28.674 ns 28.720 ns]
Found 3 outliers among 100 measurements (3.00%)
2 (2.00%) high mild
1 (1.00%) high severe
despawn_world/100_entities
time: [286.95 ns 287.41 ns 287.90 ns]
Found 5 outliers among 100 measurements (5.00%)
5 (5.00%) high mild
despawn_world/1000_entities
time: [2.8739 µs 2.9001 µs 2.9355 µs]
Found 7 outliers among 100 measurements (7.00%)
1 (1.00%) high mild
6 (6.00%) high severe
despawn_world/10000_entities
time: [28.535 µs 28.617 µs 28.698 µs]
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) high mild
1 (1.00%) high severe
despawn_world_recursive/1_entities
time: [5.2270 ns 5.2507 ns 5.2907 ns]
Found 11 outliers among 100 measurements (11.00%)
1 (1.00%) low mild
6 (6.00%) high mild
4 (4.00%) high severe
despawn_world_recursive/10_entities
time: [57.495 ns 57.590 ns 57.691 ns]
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) low mild
1 (1.00%) high mild
despawn_world_recursive/100_entities
time: [514.43 ns 518.91 ns 526.88 ns]
Found 4 outliers among 100 measurements (4.00%)
1 (1.00%) high mild
3 (3.00%) high severe
despawn_world_recursive/1000_entities
time: [5.0362 µs 5.0463 µs 5.0578 µs]
Found 7 outliers among 100 measurements (7.00%)
2 (2.00%) high mild
5 (5.00%) high severe
despawn_world_recursive/10000_entities
time: [51.159 µs 51.603 µs 52.215 µs]
Found 9 outliers among 100 measurements (9.00%)
3 (3.00%) high mild
6 (6.00%) high severe
```
# Objective
System param validation warnings should be configurable and default to
"warn once" (per system).
Fixes: #15391
## Solution
`SystemMeta` is given a new `ParamWarnPolicy` field.
The policy decides whether warnings will be emitted by each system param
when it fails validation.
The policy is updated by the system after param validation fails.
Example warning:
```
2024-09-30T18:10:04.740749Z WARN bevy_ecs::system::function_system: System fallible_params::do_nothing_fail_validation will not run because it requested inaccessible system parameter Single<(), (With<Player>, With<Enemy>)>
```
Currently, only the first invalid parameter is displayed.
Warnings can be disabled on function systems using
`.param_never_warn()`.
(there is also `.with_param_warn_policy(policy)`)
## Testing
Ran `fallible_params` example.
---------
Co-authored-by: SpecificProtagonist <vincentjunge@posteo.net>
This is an updated version of #15530. Review comments were addressed.
This commit changes the animation graph evaluation to be operate in a
more sensible order and updates the semantics of blend nodes to conform
to [the animation composition RFC]. Prior to this patch, a node graph
like this:
```
┌─────┐
│ │
│ 1 │
│ │
└──┬──┘
│
┌───────┴───────┐
│ │
▼ ▼
┌─────┐ ┌─────┐
│ │ │ │
│ 2 │ │ 3 │
│ │ │ │
└──┬──┘ └──┬──┘
│ │
┌───┴───┐ ┌───┴───┐
│ │ │ │
▼ ▼ ▼ ▼
┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐
│ │ │ │ │ │ │ │
│ 4 │ │ 6 │ │ 5 │ │ 7 │
│ │ │ │ │ │ │ │
└─────┘ └─────┘ └─────┘ └─────┘
```
Would be evaluated as (((4 ⊕ 5) ⊕ 6) ⊕ 7), with the blend (lerp/slerp)
operation notated as ⊕. As quaternion multiplication isn't commutative,
this is very counterintuitive and will especially lead to trouble with
the forthcoming additive blending feature (#15198).
This patch fixes the issue by changing the evaluation order to
postorder, with children of a node evaluated in ascending order by node
index.
To do so, this patch revamps `AnimationCurve` to be based on an
*evaluation stack* and a *blend register*. During target evaluation, the
graph evaluator traverses the graph in postorder. When encountering a
clip node, the evaluator pushes the possibly-interpolated value onto the
evaluation stack. When encountering a blend node, the evaluator pops
values off the stack into the blend register, accumulating weights as
appropriate. When the graph is completely evaluated, the top element on
the stack is *committed* to the property of the component.
A new system, the *graph threading* system, is added in order to cache
the sorted postorder traversal to avoid the overhead of sorting children
at animation evaluation time. Mask evaluation has been moved to this
system so that the graph only has to be traversed at most once per
frame. Unlike the `ActiveAnimation` list, the *threaded graph* is cached
from frame to frame and only has to be regenerated when the animation
graph asset changes.
This patch currently regresses the `animate_target` performance in
`many_foxes` by around 50%, resulting in an FPS loss of about 2-3 FPS.
I'd argue that this is an acceptable price to pay for a much more
intuitive system. In the future, we can mitigate the regression with a
fast path that avoids consulting the graph if only one animation is
playing. However, in the interest of keeping this patch simple, I didn't
do so here.
[the animation composition RFC]:
https://github.com/bevyengine/rfcs/blob/main/rfcs/51-animation-composition.md
# Objective
- Describe the objective or issue this PR addresses.
- If you're fixing a specific issue, say "Fixes #X".
## Solution
- Describe the solution used to achieve the objective above.
## Testing
- Did you test these changes? If so, how?
- Are there any parts that need more testing?
- How can other people (reviewers) test your changes? Is there anything
specific they need to know?
- If relevant, what platforms did you test these changes on, and are
there any important ones you can't test?
---
## Showcase
> This section is optional. If this PR does not include a visual change
or does not add a new feature, you can delete this section.
- Help others understand the result of this PR by showcasing your
awesome work!
- If this PR adds a new feature or public API, consider adding a brief
pseudo-code snippet of it in action
- If this PR includes a visual change, consider adding a screenshot,
GIF, or video
- If you want, you could even include a before/after comparison!
- If the Migration Guide adequately covers the changes, you can delete
this section
While a showcase should aim to be brief and digestible, you can use a
toggleable section to save space on longer showcases:
<details>
<summary>Click to view showcase</summary>
```rust
println!("My super cool code.");
```
</details>
## Migration Guide
> This section is optional. If there are no breaking changes, you can
delete this section.
- If this PR is a breaking change (relative to the last release of
Bevy), describe how a user might need to migrate their code to support
these changes
- Simply adding new functionality is not a breaking change.
- Fixing behavior that was definitely a bug, rather than a questionable
design choice is not a breaking change.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
- The capsule gizmo uses straight lines for the upper and lower circle
which looks pretty ugly.
## Solution
- Use the circle gizmo instead
---
## Showcase
**BEFORE**
**AFTER**
(the circles are red for demonstration purposes only)
# Notes
I also tried using 3d arcs instead of circles but it looks like arcs
need a lot more computation for an almost identical end result. Circles
seem much simpler. The only thing I'm unsure about is if the rotation
stuff is correct. It worked in my testing though.
# Objective
The `queue()` method is an optional trait method which is necessary for
deferred operations (such as command queues) to work properly in the
context of an observer.
This method was omitted from the proc_macro blanket implementation of
`ParamSet` for tuples; as a result, SystemParams with deferred
application (such as Commands) would not work in observers if they were
part of a ParamSet.
This appears to have been a simple omission, as `queue()` was already
implemented for the separate blanket implementation of `ParamSet` for
`Vec<T>`. In both cases, it is a simple pass-through to the component
SystemParams.
## Solution
Add the `queue()` method implementation to the `impl_param_set` proco
macro.
## Testing
Added a unit test which clearly demonstrates the issue. It fails before
the fix, and passes afterwards.
---
# Objective
It is somewhat unlikely we will actually be able to support
`TransformCurve` (introduced in #15434) after the `AnimationGraph`
evaluation order changes in the immediate future. This is because
correctly blending overlapping animation properties is nontrivial, and
`Transform` overlaps with all of its own fields. We could still
potentially create something like this in the future, but it's likely to
require significant design and implementation work. By way of contrast,
the single-property wrappers `TranslationCurve`, `ScaleCurve`, and
`RotationCurve` should work perfectly fine, since they are
non-overlapping.
In this version release, creating `TransformCurve` in userspace is also
quite easy if desired (see the deletions from this PR).
## Solution
Delete `TransformCurve`.
## Migration Guide
There is no released version that contains this, but we should make sure
that `TransformCurve` is excluded from the release notes for #15434 if
we merge this pull request.
# Objective
- I'm building a streaming plugin for `bevy_remote` and accessing to
builtin method will be very valuable
## Solution
- Add a method to allow access a handler by method name.
## Testing
- CI should pass
# Objective
- Closes#15577
## Solution
The following functions can now also take multiple component IDs and
return multiple pointers back:
- `EntityRef::get_by_id`
- `EntityMut::get_by_id`
- `EntityMut::into_borrow_by_id`
- `EntityMut::get_mut_by_id`
- `EntityMut::into_mut_by_id`
- `EntityWorldMut::get_by_id`
- `EntityWorldMut::into_borrow_by_id`
- `EntityWorldMut::get_mut_by_id`
- `EntityWorldMut::into_mut_by_id`
If you pass in X, you receive Y:
- give a single `ComponentId`, receive a single `Ptr`/`MutUntyped`
- give a `[ComponentId; N]` (array), receive a `[Ptr; N]`/`[MutUntyped;
N]`
- give a `&[ComponentId; N]` (array), receive a `[Ptr; N]`/`[MutUntyped;
N]`
- give a `&[ComponentId]` (slice), receive a
`Vec<Ptr>`/`Vec<MutUntyped>`
- give a `&HashSet<ComponentId>`, receive a `HashMap<ComponentId,
Ptr>`/`HashMap<ComponentId, MutUntyped>`
## Testing
- Added 4 new tests.
---
## Migration Guide
- The following functions now return an `Result<_,
EntityComponentError>` instead of a `Option<_>`: `EntityRef::get_by_id`,
`EntityMut::get_by_id`, `EntityMut::into_borrow_by_id`,
`EntityMut::get_mut_by_id`, `EntityMut::into_mut_by_id`,
`EntityWorldMut::get_by_id`, `EntityWorldMut::into_borrow_by_id`,
`EntityWorldMut::get_mut_by_id`, `EntityWorldMut::into_mut_by_id`
The components needed for `DirectionalLight` are added automatically
since #15554
`create_point_light` already existed and returns a `PointLight` with
these same settings
# Objective
Citing @mweatherley
> There is a lot of shortfall for simple cases— e.g., we should have
library functions for making a curve connecting two points, eased
versions of that, and so on.
## Solution
This PR implements
- a simple `Easing` trait which is implemented for all `impl Curve<f32>`
types. We can't really guarantee that these curves have unit interval
domain, which some people would probably expect, but it is documented
that this isn't the case for these types and we redirect to
`EasingCurve` which is used for that purpose
- an `EasingCurve` struct, which is used to interpolate between two
values `start` and `end` using a `impl Easing` curve where the curve
will be guaranteed to be reparametrized
- a `LinearCurve` which linearly interpolates between two values `start`
and `end`
- a `CubicBezierCurve` which interpolates between `start` and `end`
values using a `CubicSegment`
- a `StepCurve` which interpolates between `start` and `end` with an
step-function with `n` steps
- an `ElasticCurve` which interpolates between `start` and `end` with
spring like behavior where the elasticity of the spring is configurable
- some `FunctionCurve` easing curves for different popular functions
including: `quadratic_ease_in`, `quadratic_ease_out`, `smoothstep`,
`identity`
## Testing
- there are a few new tests for all of these in the main module
---------
Co-authored-by: eckz <567737+eckz@users.noreply.github.com>
Co-authored-by: Miles Silberling-Cook <NthTensor@users.noreply.github.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Matty <weatherleymatthew@gmail.com>
Early implementation. I still have to fix the documentation and consider
writing a small migration guide.
Questions left to answer:
* [x] should thickness be an overridable constant?
* [x] is there a better way to implement `Eq`/`Hash` for `SSAOMethod`?
* [x] do we want to keep the linear sampler for the depth texture?
* [x] is there a better way to separate the logic than preprocessor
macros?
## Migration guide
SSAO algorithm was changed from GTAO to VBAO (visibility bitmasks). A
new field, `constant_object_thickness`, was added to
`ScreenSpaceAmbientOcclusion`. `ScreenSpaceAmbientOcclusion` also lost
its `Eq` and `Hash` implementations.
---------
Co-authored-by: JMS55 <47158642+JMS55@users.noreply.github.com>
# Objective
Relevant: #15208
## Solution
I went ahead and added the variadics documentation in all applicable
locations.
## Testing
- I built the documentation and inspected it to see whether the feature
is there.
As discussed in #15521
- Partial revert of #14897, reverting the change to the methods to
consume `self`
- The `insert_if` method is kept
The migration guide of #14897 should be removed
Closes#15521
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
# Objective
- Remove dependency in bevy_asset to bevy_winit
- First step for #15565
## Solution
- the static `ANDROID_APP` and the `android_activity` reexport are now
in `bevy_window`
## Migration Guide
If you use the `android_activity` reexport from
`bevy::winit::android_activity`, it is now in
`bevy:🪟:android_activity`. Same for the `ANDROID_APP` static
## Objective
I am using BRP for a web inspector. To get components from a entity is
first do a `bevy/list` on the specific entity and then use the result in
a `bevy/get` request. The problem with this is `bevy/list` returns all
components even if they aren't reflect-able (which is what I expect) but
when I then do a `bevy/get` request even if all bar one of the
components are reflect-able the request will fail.
## Solution
Update the `bevy/get` response to include a map of components like it
did for successful request and a map of errors. This means if one or
more components are not present on the entity or cannot be reflected it
will not fail the entire request.
I also only did `bevy/get` as I don't think any of the other methods
would benefit from this.
## Testing
I tested this with my inspector and with a http client and it worked as
expected.
---------
Co-authored-by: Pablo Reinhardt <126117294+pablo-lua@users.noreply.github.com>
# Objective
### The Problem
Currently, the reflection deserializers give little control to users for
how a type is deserialized. The most control a user can have is to
register `ReflectDeserialize`, which will use a type's `Deserialize`
implementation.
However, there are times when a type may require slightly more control.
For example, let's say we want to make Bevy's `Mesh` easier to
deserialize via reflection (assume `Mesh` actually implemented
`Reflect`). Since we want this to be extensible, we'll make it so users
can use their own types so long as they satisfy `Into<Mesh>`. The end
result should allow users to define a RON file like:
```rust
{
"my_game::meshes::Sphere": (
radius: 2.5
)
}
```
### The Current Solution
Since we don't know the types ahead of time, we'll need to use
reflection. Luckily, we can access type information dynamically via the
type registry. Let's make a custom type data struct that users can
register on their types:
```rust
pub struct ReflectIntoMesh {
// ...
}
impl<T: FromReflect + Into<Mesh>> FromType<T> for ReflectIntoMesh {
fn from_type() -> Self {
// ...
}
}
```
Now we'll need a way to use this type data during deserialization.
Unfortunately, we can't use `Deserialize` since we need access to the
registry. This is where `DeserializeSeed` comes in handy:
```rust
pub struct MeshDeserializer<'a> {
pub registry: &'a TypeRegistry
}
impl<'a, 'de> DeserializeSeed<'de> for MeshDeserializer<'a> {
type Value = Mesh;
fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: serde::Deserializer<'de>,
{
struct MeshVisitor<'a> {
registry: &'a TypeRegistry
}
impl<'a, 'de> Visitor<'de> for MeshVisitor<'a> {
fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
write!(formatter, "map containing mesh information")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, serde:🇩🇪:Error> where A: MapAccess<'de> {
// Parse the type name
let type_name = map.next_key::<String>()?.unwrap();
// Deserialize the value based on the type name
let registration = self.registry
.get_with_name(&type_name)
.expect("should be registered");
let value = map.next_value_seed(TypedReflectDeserializer {
registration,
registry: self.registry,
})?;
// Convert the deserialized value into a `Mesh`
let into_mesh = registration.data::<ReflectIntoMesh>().unwrap();
Ok(into_mesh.into(value))
}
}
}
}
```
### The Problem with the Current Solution
The solution above works great when all we need to do is deserialize
`Mesh` directly. But now, we want to be able to deserialize a struct
like this:
```rust
struct Fireball {
damage: f32,
mesh: Mesh,
}
```
This might look simple enough and should theoretically be no problem for
the reflection deserializer to handle, but this is where our
`MeshDeserializer` solution starts to break down.
In order to use `MeshDeserializer`, we need to have access to the
registry. The reflection deserializers have access to that, but we have
no way of borrowing it for our own deserialization since they have no
way of knowing about `MeshDeserializer`.
This means we need to implement _another_ `DeserializeSeed`— this time
for `Fireball`!
And if we decided to put `Fireball` inside another type, well now we
need one for that type as well.
As you can see, this solution does not scale well and results in a lot
of unnecessary boilerplate for the user.
## Solution
> [!note]
> This PR originally only included the addition of
`DeserializeWithRegistry`. Since then, a corresponding
`SerializeWithRegistry` trait has also been added. The reasoning and
usage is pretty much the same as the former so I didn't bother to update
the full PR description.
Created the `DeserializeWithRegistry` trait and
`ReflectDeserializeWithRegistry` type data.
The `DeserializeWithRegistry` trait works like a standard `Deserialize`
but provides access to the registry. And by registering the
`ReflectDeserializeWithRegistry` type data, the reflection deserializers
will automatically use the `DeserializeWithRegistry` implementation,
just like it does for `Deserialize`.
All we need to do is make the following changes:
```diff
#[derive(Reflect)]
+ #[reflect(DeserializeWithRegistry)]
struct Mesh {
// ...
}
- impl<'a, 'de> DeserializeSeed<'de> for MeshDeserializer<'a> {
- type Value = Mesh;
- fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+ impl<'de> DeserializeWithRegistry<'de> for Mesh {
+ fn deserialize<D>(deserializer: D, registry: &TypeRegistry) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
// ...
}
}
```
Now, any time the reflection deserializer comes across `Mesh`, it will
opt to use its `DeserializeWithRegistry` implementation. And this means
we no longer need to create a whole slew of `DeserializeSeed` types just
to deserialize `Mesh`.
### Why not a trait like `DeserializeSeed`?
While this would allow for anyone to define a deserializer for `Mesh`,
the problem is that it means __anyone can define a deserializer for
`Mesh`.__ This has the unfortunate consequence that users can never be
certain that their registration of `ReflectDeserializeSeed` is the one
that will actually be used.
We could consider adding something like that in the future, but I think
this PR's solution is much safer and follows the example set by
`ReflectDeserialize`.
### What if we made the `TypeRegistry` globally available?
This is one potential solution and has been discussed before (#6101).
However, that change is much more controversial and comes with its own
set of disadvantages (can't have multiple registries such as with
multiple worlds, likely some added performance cost with each access,
etc.).
### Followup Work
Once this PR is merged, we should consider merging `ReflectDeserialize`
into `DeserializeWithRegistry`. ~~There is already a blanket
implementation to make this transition generally pretty
straightforward.~~ The blanket implementations were removed for the sake
of this PR and will need to be re-added in the followup. I would propose
that we first mark `ReflectDeserialize` as deprecated, though, before we
outright remove it in a future release.
---
## Changelog
- Added the `DeserializeReflect` trait and `ReflectDeserializeReflect`
type data
- Added the `SerializeReflect` trait and `ReflectSerializeReflect` type
data
- Added `TypedReflectDeserializer::of` convenience constructor
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: aecsocket <43144841+aecsocket@users.noreply.github.com>
# Objective
- Fixes#14826
- For context, see #15238
## Solution
Add a `GhostNode` component to `bevy_ui` and update all the relevant
systems to use it to traverse for UI children.
- [x] `ghost_hierarchy` module
- [x] Add `GhostNode`
- [x] Add `UiRootNodes` system param for iterating (ghost-aware) UI root
nodes
- [x] Add `UiChildren` system param for iterating (ghost-aware) UI
children
- [x] Update `layout::ui_layout_system`
- [x] Use ghost-aware root nodes for camera updates
- [x] Update and remove children in taffy
- [x] Initial spawn
- [x] Detect changes on nested UI children
- [x] Use ghost-aware children traversal in
`update_uinode_geometry_recursive`
- [x] Update the rest of the UI systems to use the ghost hierarchy
- [x] `stack::ui_stack_system`
- [x] `update::`
- [x] `update_clipping_system`
- [x] `update_target_camera_system`
- [x] `accessibility::calc_name`
## Testing
- [x] Added a new example `ghost_nodes` that can be used as a testbed.
- [x] Added unit tests for _some_ of the traversal utilities in
`ghost_hierarchy`
- [x] Ensure this fulfills the needs for currently known use cases
- [x] Reactivity libraries (test with `bevy_reactor`)
- [ ] Text spans (mentioned by koe [on
discord](https://discord.com/channels/691052431525675048/1285371432460881991/1285377442998915246))
---
## Performance
[See comment
below](https://github.com/bevyengine/bevy/pull/15341#issuecomment-2385456820)
## Migration guide
Any code that previously relied on `Parent`/`Children` to iterate UI
children may now want to use `bevy_ui::UiChildren` to ensure ghost nodes
are skipped, and their first descendant Nodes included.
UI root nodes may now be children of ghost nodes, which means
`Without<Parent>` might not query all root nodes. Use
`bevy_ui::UiRootNodes` where needed to iterate root nodes instead.
## Potential future work
- Benchmarking/optimizations of hierarchies containing lots of ghost
nodes
- Further exploration of UI hierarchies and markers for root nodes/leaf
nodes to create better ergonomics for things like `UiLayer` (world-space
ui)
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: UkoeHB <37489173+UkoeHB@users.noreply.github.com>
# Objective
- Prepare `TextPipeline` to work with multi-entity text blocks. See
https://github.com/bevyengine/bevy/discussions/15014
## Solution
- Refactor `TextPipeline::update_buffer` to accept an iterator instead
of slice. Adjust `update_buffer` implementation to only iterate spans
once instead of three times (which would require iterating a hierarchy
three times with multi-entity blocks).
## Testing
- Tested with `text_debug` example.
# Objective
Again, a step forward in the migration to required components: a bunch
of camera rendering cormponents!
Note that this does not include the camera components themselves yet,
because the naming and API for `Camera` hasn't been fully decided yet.
## Solution
As per the [selected
proposals](https://hackmd.io/@bevy/required_components/%2FpiqD9GOdSFKZZGzzh3C7Uw):
- Deprecate `MotionBlurBundle` in favor of the `MotionBlur` component
- Deprecate `TemporalAntiAliasBundle` in favor of the
`TemporalAntiAliasing` component
- Deprecate `ScreenSpaceAmbientOcclusionBundle` in favor of the
`ScreenSpaceAmbientOcclusion` component
- Deprecate `ScreenSpaceReflectionsBundle` in favor of the
`ScreenSpaceReflections` component
---
## Migration Guide
`MotionBlurBundle`, `TemporalAntiAliasBundle`,
`ScreenSpaceAmbientOcclusionBundle`, and `ScreenSpaceReflectionsBundle`
have been deprecated in favor of the `MotionBlur`,
`TemporalAntiAliasing`, `ScreenSpaceAmbientOcclusion`, and
`ScreenSpaceReflections` components instead. Inserting them will now
also insert the other components required by them automatically.
# Objective
What's that? Another PR for the grand migration to required components?
This time, audio!
## Solution
Deprecate `AudioSourceBundle`, `AudioBundle`, and `PitchBundle`, as per
the [chosen
proposal](https://hackmd.io/@bevy/required_components/%2Fzxgp-zMMRUCdT7LY1ZDQwQ).
However, we cannot call the component `AudioSource`, because that's what
the stored asset is called. I deliberated on a few names, like
`AudioHandle`, or even just `Audio`, but landed on `AudioPlayer`, since
it's probably the most accurate and "nice" name for this. Open to
alternatives though.
---
## Migration Guide
Replace all insertions of `AudioSoucreBundle`, `AudioBundle`, and
`PitchBundle` with the `AudioPlayer` component. The other components
required by it will now be inserted automatically.
In cases where the generics cannot be inferred, you may need to specify
them explicitly. For example:
```rust
commands.spawn(AudioPlayer::<AudioSource>(asset_server.load("sounds/sick_beats.ogg")));
```
# Objective
A step in the migration to required components: scenes!
## Solution
As per the [selected
proposal](https://hackmd.io/@bevy/required_components/%2FPJtNGVMMQhyM0zIvCJSkbA):
- Deprecate `SceneBundle` and `DynamicSceneBundle`.
- Add `SceneRoot` and `DynamicSceneRoot` components, which wrap a
`Handle<Scene>` and `Handle<DynamicScene>` respectively.
## Migration Guide
Asset handles for scenes and dynamic scenes must now be wrapped in the
`SceneRoot` and `DynamicSceneRoot` components. Raw handles as components
no longer spawn scenes.
Additionally, `SceneBundle` and `DynamicSceneBundle` have been
deprecated. Instead, use the scene components directly.
Previously:
```rust
let model_scene = asset_server.load(GltfAssetLabel::Scene(0).from_asset("model.gltf"));
commands.spawn(SceneBundle {
scene: model_scene,
transform: Transform::from_xyz(-4.0, 0.0, -3.0),
..default()
});
```
Now:
```rust
let model_scene = asset_server.load(GltfAssetLabel::Scene(0).from_asset("model.gltf"));
commands.spawn((
SceneRoot(model_scene),
Transform::from_xyz(-4.0, 0.0, -3.0),
));
```
# Objective
- Improve code quality in preparation for
https://github.com/bevyengine/bevy/discussions/15014
## Solution
- Rename BreakLineOn to LineBreak.
## Migration Guide
`BreakLineOn` was renamed to `LineBreak`, and paramters named
`linebreak_behavior` were renamed to `linebreak`.
# Objective
Add two features to switch bevy to use `NativeActivity` or
`GameActivity` on Android, use `GameActivity` by default.
Also close #12058 and probably #12026 .
## Solution
Add two features to the corresponding crates so you can toggle it, like
what `winit` and `android-activity` crate did.
---
## Changelog
Removed default `NativeActivity` feature implementation for Android,
added two new features to enable `NativeActivity` and `GameActivity`,
and use `GameActivity` by default.
## Migration Guide
Because `cargo-apk` is not compatible with `GameActivity`,
building/running using `cargo apk build/run -p bevy_mobile_example` is
no longer possible.
Users should follow the new workflow described in document.
---------
Co-authored-by: François Mockers <francois.mockers@vleue.com>
Co-authored-by: BD103 <59022059+BD103@users.noreply.github.com>
Co-authored-by: Rich Churcher <rich.churcher@gmail.com>
# Objective
A big step in the migration to required components: meshes and
materials!
## Solution
As per the [selected
proposal](https://hackmd.io/@bevy/required_components/%2Fj9-PnF-2QKK0on1KQ29UWQ):
- Deprecate `MaterialMesh2dBundle`, `MaterialMeshBundle`, and
`PbrBundle`.
- Add `Mesh2d` and `Mesh3d` components, which wrap a `Handle<Mesh>`.
- Add `MeshMaterial2d<M: Material2d>` and `MeshMaterial3d<M: Material>`,
which wrap a `Handle<M>`.
- Meshes *without* a mesh material should be rendered with a default
material. The existence of a material is determined by
`HasMaterial2d`/`HasMaterial3d`, which is required by
`MeshMaterial2d`/`MeshMaterial3d`. This gets around problems with the
generics.
Previously:
```rust
commands.spawn(MaterialMesh2dBundle {
mesh: meshes.add(Circle::new(100.0)).into(),
material: materials.add(Color::srgb(7.5, 0.0, 7.5)),
transform: Transform::from_translation(Vec3::new(-200., 0., 0.)),
..default()
});
```
Now:
```rust
commands.spawn((
Mesh2d(meshes.add(Circle::new(100.0))),
MeshMaterial2d(materials.add(Color::srgb(7.5, 0.0, 7.5))),
Transform::from_translation(Vec3::new(-200., 0., 0.)),
));
```
If the mesh material is missing, previously nothing was rendered. Now,
it renders a white default `ColorMaterial` in 2D and a
`StandardMaterial` in 3D (this can be overridden). Below, only every
other entity has a material:
Why white? This is still open for discussion, but I think white makes
sense for a *default* material, while *invalid* asset handles pointing
to nothing should have something like a pink material to indicate that
something is broken (I don't handle that in this PR yet). This is kind
of a mix of Godot and Unity: Godot just renders a white material for
non-existent materials, while Unity renders nothing when no materials
exist, but renders pink for invalid materials. I can also change the
default material to pink if that is preferable though.
## Testing
I ran some 2D and 3D examples to test if anything changed visually. I
have not tested all examples or features yet however. If anyone wants to
test more extensively, it would be appreciated!
## Implementation Notes
- The relationship between `bevy_render` and `bevy_pbr` is weird here.
`bevy_render` needs `Mesh3d` for its own systems, but `bevy_pbr` has all
of the material logic, and `bevy_render` doesn't depend on it. I feel
like the two crates should be refactored in some way, but I think that's
out of scope for this PR.
- I didn't migrate meshlets to required components yet. That can
probably be done in a follow-up, as this is already a huge PR.
- It is becoming increasingly clear to me that we really, *really* want
to disallow raw asset handles as components. They caused me a *ton* of
headache here already, and it took me a long time to find every place
that queried for them or inserted them directly on entities, since there
were no compiler errors for it. If we don't remove the `Component`
derive, I expect raw asset handles to be a *huge* footgun for users as
we transition to wrapper components, especially as handles as components
have been the norm so far. I personally consider this to be a blocker
for 0.15: we need to migrate to wrapper components for asset handles
everywhere, and remove the `Component` derive. Also see
https://github.com/bevyengine/bevy/issues/14124.
---
## Migration Guide
Asset handles for meshes and mesh materials must now be wrapped in the
`Mesh2d` and `MeshMaterial2d` or `Mesh3d` and `MeshMaterial3d`
components for 2D and 3D respectively. Raw handles as components no
longer render meshes.
Additionally, `MaterialMesh2dBundle`, `MaterialMeshBundle`, and
`PbrBundle` have been deprecated. Instead, use the mesh and material
components directly.
Previously:
```rust
commands.spawn(MaterialMesh2dBundle {
mesh: meshes.add(Circle::new(100.0)).into(),
material: materials.add(Color::srgb(7.5, 0.0, 7.5)),
transform: Transform::from_translation(Vec3::new(-200., 0., 0.)),
..default()
});
```
Now:
```rust
commands.spawn((
Mesh2d(meshes.add(Circle::new(100.0))),
MeshMaterial2d(materials.add(Color::srgb(7.5, 0.0, 7.5))),
Transform::from_translation(Vec3::new(-200., 0., 0.)),
));
```
If the mesh material is missing, a white default material is now used.
Previously, nothing was rendered if the material was missing.
The `WithMesh2d` and `WithMesh3d` query filter type aliases have also
been removed. Simply use `With<Mesh2d>` or `With<Mesh3d>`.
---------
Co-authored-by: Tim Blackbird <justthecooldude@gmail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
# Objective
Another part of the migration to required components: fog volumes!
## Solution
Deprecate `FogVolumeBundle` and make `FogVolume` require `Transform` and
`Visibility`, as per the [chosen
proposal](https://hackmd.io/@bevy/required_components/%2FcO7JPSAQR5G0J_j5wNwtOQ).
---
## Migration Guide
Replace all insertions of `FogVolumeBundle` with the `Visibility`
component. The other components required by it will now be inserted
automatically.
Previous PR https://github.com/bevyengine/bevy/pull/14549 was closed in
error and couldn't be reopened since I had updated the branch
😿
# Objective
Fixes#14465
## Solution
`ReflectMapEntities` now works similarly to `MapEntities` in that it
works on the reflected value itself rather than the component in the
world after insertion. This makes it so that observers see the remapped
entities on insertion rather than the entity IDs from the scene.
`ReflectMapEntities` now works for both components and resources, so we
only need the one.
## Testing
* New unit test for `Observer`s + `DynamicScene`s
* New unit test for `Observer`s + `Scene`s
* Open to suggestions for other tests!
---
## Migration Guide
- Consumers of `ReflectMapEntities` will need to call `map_entities` on
values prior to inserting them into the world.
- Implementors of `MapEntities` will need to remove the `mappings`
method, which is no longer needed for `ReflectMapEntities` and has been
removed from the trait.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Hennadii Chernyshchyk <genaloner@gmail.com>
# Objective
- First step towards #15558
## Solution
- Rename `get_vertex_buffer_data` to `create_packed_vertex_buffer_data`
to make it clear that it is not "free" and actually allocates
- Compute length analytically for preallocation instead of creating the
buffer to get its length and immediately discard it
- Use existing vertex attribute size calculation method to reduce code
duplication
- Fix a bug where mesh index data was being replaced by unnecessarily
newly created mesh vertex data in some cases
- Overall reduces mesh copies by two. We still have plenty to go, but
these were the easy ones.
## Testing
- I ran 3d_scene, lighting, and many_cubes, they look fine.
- Benchmarks would be nice, but this is very obviously a win in perf and
correctness.
---
## Migration Guide
- `Mesh::create_packed_vertex_buffer_data` has been renamed
`Mesh::create_packed_vertex_buffer_data` to reflect the fact that it
copies data and allocates.
## Showcase
- look mom, less copies
# Objective
The `NestedLoader` API as it stands right now is somewhat lacking:
- It consists of several types `NestedLoader`, `UntypedNestedLoader`,
`DirectNestedLoader`, and `UntypedDirectNestedLoader`, where a typestate
pattern on `NestedLoader` would be make it more obvious what it does,
and allow centralising the documentation
- The term "untyped" in the asset loader code is overloaded. It can mean
either:
- we have literally no idea what the type of this asset will be when we
load it (I dub this "unknown type")
- we know what type of asset it will be, but we don't know it statically
- we only have a TypeId (I dub this "dynamic type" / "erased")
- There is no way to get an `UntypedHandle` (erased) given a `TypeId`
## Solution
Changes `NestedLoader` into a type-state pattern, adding two type
params:
- `T` determines the typing
- `StaticTyped`, the default, where you pass in `A` statically into `fn
load<A>() -> ..`
- `DynamicTyped`, where you give a `TypeId`, giving you a
`UntypedHandle`
- `UnknownTyped`, where you have literally no idea what type of asset
you're loading, giving you a `Handle<LoadedUntypedAsset>`
- `M` determines the "mode" (bikeshedding TBD, I couldn't come up with a
better name)
- `Deferred`, the default, won't load the asset when you call `load`,
but it does give you a `Handle` to it (this is nice since it can be a
sync fn)
- `Immediate` will load the asset as soon as you call it, and give you
access to it, but you must be in an async context to call it
Changes some naming of internals in `AssetServer` to fit the new
definitions of "dynamic type" and "unknown type". Note that I didn't do
a full pass over this code to keep the diff small. That can probably be
done in a new PR - I think the definiton I laid out of unknown type vs.
erased makes it pretty clear where each one applies.
<details>
<summary>Old issue</summary>
The only real problem I have with this PR is the requirement to pass in
`type_name` (from `core::any::type_name`) into Erased. Users might not
have that type name, only the ID, and it just seems sort of weird to
*have* to give an asset type name. However, the reason we need it is
because of this:
```rs
pub(crate) fn get_or_create_path_handle_erased(
&mut self,
path: AssetPath<'static>,
type_id: TypeId,
type_name: &str,
loading_mode: HandleLoadingMode,
meta_transform: Option<MetaTransform>,
) -> (UntypedHandle, bool) {
let result = self.get_or_create_path_handle_internal(
path,
Some(type_id),
loading_mode,
meta_transform,
);
// it is ok to unwrap because TypeId was specified above
unwrap_with_context(result, type_name).unwrap()
}
pub(crate) fn unwrap_with_context<T>(
result: Result<T, GetOrCreateHandleInternalError>,
type_name: &str,
) -> Option<T> {
match result {
Ok(value) => Some(value),
Err(GetOrCreateHandleInternalError::HandleMissingButTypeIdNotSpecified) => None,
Err(GetOrCreateHandleInternalError::MissingHandleProviderError(_)) => {
panic!("Cannot allocate an Asset Handle of type '{type_name}' because the asset type has not been initialized. \
Make sure you have called app.init_asset::<{type_name}>()")
}
}
}
```
This `unwrap_with_context` is literally the only reason we need the
`type_name`. Potentially, this can be turned into an `impl
Into<Option<&str>>`, and output a different error message if the type
name is missing. Since if we are loading an asset where we only know the
type ID, by definition we can't output that error message, since we
don't have the type name. I'm open to suggestions on this.
</details>
## Testing
Not sure how to test this, since I kept most of the actual NestedLoader
logic the same. The only new API is loading an `UntypedHandle` when in
the `DynamicTyped, Immediate` state.
## Migration Guide
Code which uses `bevy_asset`'s `LoadContext::loader` / `NestedLoader`
will see some naming changes:
- `untyped` is replaced by `with_unknown_type`
- `with_asset_type` is replaced by `with_static_type`
- `with_asset_type_id` is replaced by `with_dynamic_type`
- `direct` is replaced by `immediate` (the opposite of "immediate" is
"deferred")
