# Objective
When running the scene example, you might notice we end up printing out the following:
```ron
// ...
{
"scene::ComponentB": (
value: "hello",
_time_since_startup: (
secs: 0,
nanos: 0,
),
),
},
// ...
```
We should not be printing out `_time_since_startup` as the field is marked with `#[reflect(skip_serializing)]`:
```rust
#[derive(Component, Reflect)]
#[reflect(Component)]
struct ComponentB {
pub value: String,
#[reflect(skip_serializing)]
pub _time_since_startup: Duration,
}
```
This is because when we create the `DynamicScene`, we end up calling `Reflect::clone_value`:
82126697ee/crates/bevy_scene/src/dynamic_scene_builder.rs (L114-L114)
This results in non-Value types being cloned into Dynamic types, which means the `TypeId` returned from `reflected_value.type_id()` is not the same as the original component's.
And this meant we were not able to locate the correct `TypeRegistration`.
## Solution
Use `TypeInfo::type_id()` instead of calling `Any::type_id()` on the value directly.
---
## Changelog
* Fix a bug introduced in `0.9.0-dev` where scenes disregarded component's type registrations
# Objective
- Clipping (visible in the UI example with text scrolling) is funky
- Fixes#6287
## Solution
- Fix UV calculation:
- correct order for values (issue introduced in #6000)
- add the `y` values instead of subtracting them now that vertical order is reversed
- take scale factor into account (bug already present before reversing the order)
- While around clipping, I changed clip to only mutate when changed
No more funkiness! 😞
<img width="696" alt="Screenshot 2022-10-23 at 22 44 18" src="https://user-images.githubusercontent.com/8672791/197417721-30ad4150-5264-427f-ac82-e5265c1fb3a9.png">
# Objective
Fixes#6339.
## Solution
This PR adds a new type, `GamepadInfo`, which holds metadata associated with a particular `Gamepad`. The `Gamepads` resource now holds a `HashMap<Gamepad, GamepadInfo>`. The `GamepadInfo` is created when the gamepad backend (by default `bevy_gilrs`) emits a "gamepad connected" event.
The `gamepad_viewer` example has been updated to showcase the new functionality.
Before:
After:
---
## Changelog
### Added
- Added `GamepadInfo`.
- Added `Gamepads::name()`, which returns the name of the specified gamepad if it exists.
### Changed
- `GamepadEventType::Connected` is now a tuple variant with a single field of type `GamepadInfo`.
- Since `GamepadInfo` is not `Copy`, `GamepadEventType` is no longer `Copy`. The same is true of `GamepadEvent` and `GamepadEventRaw`.
## Migration Guide
- Pattern matches on `GamepadEventType::Connected` will need to be updated, as the form of the variant has changed.
- Code that requires `GamepadEvent`, `GamepadEventRaw` or `GamepadEventType` to be `Copy` will need to be updated.
I found myself doing
```rust
let child = commands.spawn(..).id();
commands.entity(parent).add_child(child);
```
When that could just be
```rust
commands.spawn(..).set_parent(parent);
```
Adding `set_parent` was trivial as it's just an `AddChild` command. Most of the changes are for `remove_parent`.
Also updated some outdated docs.
Co-authored-by: devil-ira <justthecooldude@gmail.com>
# Objective
Adds a better interface for performing mathematical operations with UI unit `Val`. Fixes#6080.
## Solution
- Added `try_add` and `try_sub` methods to Val.
- Removed the `Add` and `AddAssign` impls for `Val` that introduced unintuitive and bug-prone behaviour.
- As a consequence of the prior, ~~changed the `Add` and `Sub` impls for the `Size` struct to take a `(Val, Val)` instead of `Vec2`~~ deleted the `Add` and `Sub` impls for the `Size` struct
- Added a `From<(Val, Val)>` impl for the `Size` struct
- Added `evaluate(size: f32)` method that converts from `Val::Percent` to `Val::Px`.
- Added `try_add_with_size` and `try_sub_with_size` methods to `Val`, which evaluate `Val::Percent` values into `Val::Px` values before adding.
---
## Migration Guide
Instead of using the + and - operators, perform calculations on `Val`s using the new `try_add` and `try_sub` methods. Multiplication and division remained unchanged. Also, when adding or subtracting from `Size`, ~~use a `Val` tuple instead of `Vec2`~~ perform the addition on `width` and `height` separately.
Co-authored-by: Dawid Piotrowski <41804418+Pietrek14@users.noreply.github.com>
# Objective
Fixes#5559
Replaces #5628
## Solution
Because the generated method from_components() creates an instance of Self my implementation requires any field type that is marked to be ignored to implement Default.
---
## Changelog
Added the possibility to ignore fields in a bundle with `#[bundle(ignore)]`. Typically used when `PhantomData` needs to be added to a `Bundle`.
# Objective
- #4466 broke local tasks running.
- Fixes https://github.com/bevyengine/bevy/issues/6120
## Solution
- Add system for ticking local executors on main thread into bevy_core where the tasks pools are initialized.
- Add ticking local executors into thread executors
## Changelog
- tick all thread local executors in task pool.
## Notes
- ~~Not 100% sure about this PR. Ticking the local executor for the main thread in scope feels a little kludgy as it requires users of bevy_tasks to be calling scope periodically for those tasks to make progress.~~ took this out in favor of a system that ticks the local executors.
# Objective
- Fix disabling features in bevy_ecs (broken by #5630)
- Add tests in CI for bevy_ecs, bevy_reflect and bevy as those crates could be use standalone
Add the following message:
```
Items are returned in the order of the list of entities.
Entities that don't match the query are skipped.
```
Additionally, the docs in `iter.rs` and `state.rs` were updated to match those in `query.rs`.
Co-authored-by: devil-ira <justthecooldude@gmail.com>
# Objective
- Add Time-Adjusted Rolling EMA-based smoothing to diagnostics.
- Closes#4983; see that issue for more more information.
## Terms
- EMA - [Exponential Moving Average](https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average)
- SMA - [Simple Moving Average](https://en.wikipedia.org/wiki/Moving_average#Simple_moving_average)
## Solution
- We use a fairly standard approximation of a true EMA where $EMA_{\text{frame}} = EMA_{\text{previous}} + \alpha \left( x_{\text{frame}} - EMA_{\text{previous}} \right)$ where $\alpha = \Delta t / \tau$ and $\tau$ is an arbitrary smoothness factor. (See #4983 for more discussion of the math.)
- The smoothness factor is here defaulted to $2 / 21$; this was chosen fairly arbitrarily as supposedly related to the existing 20-bucket SMA.
- The smoothness factor can be set on a per-diagnostic basis via `Diagnostic::with_smoothing_factor`.
---
## Changelog
### Added
- `Diagnostic::smoothed` - provides an exponentially smoothed view of a recorded diagnostic, to e.g. reduce jitter in frametime readings.
### Changed
- `LogDiagnosticsPlugin` now records the smoothed value rather than the raw value.
- For diagnostics recorded less often than every 0.1 seconds, this change to defaults will have no visible effect.
- For discrete diagnostics where this smoothing is not desirable, set a smoothing factor of 0 to disable smoothing.
- The average of the recent history is still shown when available.
# Objective
At least partially addresses #6282.
Resources are currently stored as a dedicated Resource archetype (ID 1). This allows for easy code reusability, but unnecessarily adds 72 bytes (on 64-bit systems) to the struct that is only used for that one archetype. It also requires several fields to be `pub(crate)` which isn't ideal.
This should also remove one sparse-set lookup from fetching, inserting, and removing resources from a `World`.
## Solution
- Add `Resources` parallel to `Tables` and `SparseSets` and extract the functionality used by `Archetype` in it.
- Remove `unique_components` from `Archetype`
- Remove the `pub(crate)` on `Archetype::components`.
- Remove `ArchetypeId::RESOURCE`
- Remove `Archetypes::resource` and `Archetypes::resource_mut`
---
## Changelog
Added: `Resources` type to store resources.
Added: `Storages::resource`
Removed: `ArchetypeId::RESOURCE`
Removed: `Archetypes::resource` and `Archetypes::resources`
Removed: `Archetype::unique_components` and `Archetypes::unique_components_mut`
## Migration Guide
Resources have been moved to `Resources` under `Storages` in `World`. All code dependent on `Archetype::unique_components(_mut)` should access it via `world.storages().resources()` instead.
All APIs accessing the raw data of individual resources (mutable *and* read-only) have been removed as these APIs allowed for unsound unsafe code. All usages of these APIs should be changed to use `World::{get, insert, remove}_resource`.
# Objective
Speed up queries that are fragmented over many empty archetypes and tables.
## Solution
Add a early-out to check if the table or archetype is empty before iterating over it. This adds an extra branch for every archetype matched, but skips setting the archetype/table to the underlying state and any iteration over it.
This may not be worth it for the default `Query::iter` and maybe even the `Query::for_each` implementations, but this definitely avoids scheduling unnecessary tasks in the `Query::par_for_each` case.
Ideally, `matched_archetypes` should only contain archetypes where there's actually work to do, but this would add a `O(n)` flat cost to every call to `update_archetypes` that scales with the number of matched archetypes.
TODO: Benchmark
# Objective
- Make `Time` API more consistent.
- Support time accel/decel/pause.
## Solution
This is just the `Time` half of #3002. I was told that part isn't controversial.
- Give the "delta time" and "total elapsed time" methods `f32`, `f64`, and `Duration` variants with consistent naming.
- Implement accelerating / decelerating the passage of time.
- Implement stopping time.
---
## Changelog
- Changed `time_since_startup` to `elapsed` because `time.time_*` is just silly.
- Added `relative_speed` and `set_relative_speed` methods.
- Added `is_paused`, `pause`, `unpause` , and methods. (I'd prefer `resume`, but `unpause` matches `Timer` API.)
- Added `raw_*` variants of the "delta time" and "total elapsed time" methods.
- Added `first_update` method because there's a non-zero duration between startup and the first update.
## Migration Guide
- `time.time_since_startup()` -> `time.elapsed()`
- `time.seconds_since_startup()` -> `time.elapsed_seconds_f64()`
- `time.seconds_since_startup_wrapped_f32()` -> `time.elapsed_seconds_wrapped()`
If you aren't sure which to use, most systems should continue to use "scaled" time (e.g. `time.delta_seconds()`). The realtime "unscaled" time measurements (e.g. `time.raw_delta_seconds()`) are mostly for debugging and profiling.
# Objective
Use saturate wgsl function now implemented in naga (version 0.10.0). There is now no need for one in utils.wgsl.
naga's version allows usage for not only scalars but vectors as well.
## Solution
Remove the utils.wgsl saturate function.
## Changelog
Remove saturate function from utils.wgsl in favor of saturate in naga v0.10.0.
# Objective
I recently wanted to look at the possibility of adding `Mutated` and `Unchanged` query filters and was confronted with some seemingly unrelated broken tests.
These tests were written in such a way that changing the number of WorldQuery impls in the project would break them.
Fortunately, a [very recent release of trybuild](https://github.com/dtolnay/trybuild/releases/tag/1.0.70) has made this unnecessary.
## Solution
Replace hardcoded numbers in test output with `$N` placeholders.
# Objective
Fixes https://github.com/bevyengine/bevy/issues/6306
## Solution
Change the failing assert and expand example to explain when ordering is deterministic or not.
Co-authored-by: Mike Hsu <mike.hsu@gmail.com>
# Objective
The `RenderLayers` type is never registered, making it unavailable for reflection.
## Solution
Register it in `CameraPlugin`, the same plugin that registers the related `Visibility*` types.
# Objective
Alternative to #6150
Dependabot's PR doesn't seem to break anything, but there are some deprecations that we might as well fix up.
## Solution
https://github.com/clap-rs/clap/blob/master/CHANGELOG.md#migrating
Update clap in `build-wasm-example` and `span-cmp`. Other tools don't use clap.
Remove references to `value_parser`. It's the default now.
Change `#[clap()]` to `#[arg()]`.
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
# Objective
- Update `wgpu` to 0.14.0, `naga` to `0.10.0`, `winit` to 0.27.4, `raw-window-handle` to 0.5.0, `ndk` to 0.7.
## Solution
---
## Changelog
### Changed
- Changed `RawWindowHandleWrapper` to `RawHandleWrapper` which wraps both `RawWindowHandle` and `RawDisplayHandle`, which satisfies the `impl HasRawWindowHandle and HasRawDisplayHandle` that `wgpu` 0.14.0 requires.
- Changed `bevy_window::WindowDescriptor`'s `cursor_locked` to `cursor_grab_mode`, change its type from `bool` to `bevy_window::CursorGrabMode`.
## Migration Guide
- Adjust usage of `bevy_window::WindowDescriptor`'s `cursor_locked` to `cursor_grab_mode`, and adjust its type from `bool` to `bevy_window::CursorGrabMode`.
# Objective
Fix a camera ambiguity warning in the IOS example
## Solution
I'm assuming that this was accidentally added when UI cameras stopped being a thing. So just delete the extra camera.
# Objective
To be consistent like other examples, it's better to keep file name and example name same, so we don't need to find correct example name in Cargo.toml.
## Solution
Rename example file scaling.rs to ui_scaling.rs.
# Objective
Resolves#6197
Make it so that doc comments can be retrieved via reflection.
## Solution
Adds the new `documentation` feature to `bevy_reflect` (disabled by default).
When enabled, documentation can be found using `TypeInfo::doc` for reflected types:
```rust
/// Some struct.
///
/// # Example
///
/// ```ignore
/// let some_struct = SomeStruct;
/// ```
#[derive(Reflect)]
struct SomeStruct;
let info = <SomeStruct as Typed>::type_info();
assert_eq!(
Some(" Some struct.\n\n # Example\n\n ```ignore\n let some_struct = SomeStruct;\n ```"),
info.docs()
);
```
### Notes for Reviewers
The bulk of the files simply added the same 16 lines of code (with slightly different documentation). Most of the real changes occur in the `bevy_reflect_derive` files as well as in the added tests.
---
## Changelog
* Added `documentation` feature to `bevy_reflect`
* Added `TypeInfo::docs` method (and similar methods for all info types)
# Objective
Fixes#6272
## Solution
Revert to old way of positioning text for Text2D rendered text.
Co-authored-by: Michel van der Hulst <hulstmichel@gmail.com>
# Objective
Make toggling the visibility of an entity slightly more convenient.
## Solution
Add a mutating `toggle` method to the `Visibility` component
```rust
fn my_system(mut query: Query<&mut Visibility, With<SomeMarker>>) {
let mut visibility = query.single_mut();
// before:
visibility.is_visible = !visibility.is_visible;
// after:
visibility.toggle();
}
```
## Changelog
### Added
- Added a mutating `toggle` method to the `Visibility` component
# Objective
Fixes#6244
## Solution
Uses derive to implement `Serialize` and `Deserialize` for `Timer` and `Stopwatch`
### Things to consider
- Should fields such as `finished` and `times_finished_this_tick` in `Timer` be serialized?
- Does `Countdown` and `PrintOnCompletionTimer` need to be serialized and deserialized?
## Changelog
Added `Serialize` and `Deserialize` implementations to `Timer` and `Stopwatch`, `Countdown`.
# Objective
Currently, surprising behavior happens when specifying `#[reflect(...)]` or `#[reflect_value(...)]` multiple times. Rather than merging the traits lists from all attributes, only the trait list from the last attribute is used. For example, in the following code, only the `Debug` and `Hash` traits are reflected and not `Default` or `PartialEq`:
```rs
#[derive(Debug, PartialEq, Hash, Default, Reflect)]
#[reflect(PartialEq, Default)]
#[reflect(Debug, Hash)]
struct Foo;
```
This is especially important when some traits should only be reflected under certain circumstances. For example, this previously had surprisingly behavior when the "serialize" feature is enabled:
```rs
#[derive(Debug, Hash, Reflect)]
#[reflect(Debug, Hash)]
#[cfg_attr(
feature = "serialize",
derive(Serialize, Deserialize),
reflect(Serialize, Deserialize)
]
struct Foo;
```
In addition, compile error messages generated from using the derive macro often point to the `#[derive(Reflect)]` rather than to the source of the error. It would be a lot more helpful if the compiler errors pointed to what specifically caused the error rather than just to the derive macro itself.
## Solution
Merge the trait lists in all `#[reflect(...)]` and `#[reflect_value(...)]` attributes. Additionally, make `#[reflect]` and `#[reflect_value]` mutually exclusive.
Additionally, span information is carried throughout some parts of the code now to ensure that error messages point to more useful places and better indicate what caused those errors. For example, `#[reflect(Hash, Hash)]` points to the second `Hash` as the source of an error. Also, in the following example, the compiler error now points to the `Hash` in `#[reflect(Hash)]` rather than to the derive macro:
```rs
#[derive(Reflect)]
#[reflect(Hash)] // <-- compiler error points to `Hash` for lack of a `Hash` implementation
struct Foo;
```
---
## Changelog
Changed
- Using multiple `#[reflect(...)]` or `#[reflect_value(...)]` attributes now merges the trait lists. For example, `#[reflect(Debug, Hash)] #[reflect(PartialEq, Default)]` is equivalent to `#[reflect(Debug, Hash, PartialEq, Default)]`.
- Multiple `#[reflect(...)]` and `#[reflect_value(...)]` attributes were previously accepted, but only the last attribute was respected.
- Using both `#[reflect(...)]` and `#[reflect_value(...)]` was previously accepted, but had surprising behavior. This is no longer accepted.
- Improved error messages for `#[derive(Reflect)]` by propagating useful span information. Many errors should now point to the source of those errors rather than to the derive macro.
# Objective
Fixes https://github.com/bevyengine/bevy/issues/3418
## Solution
Originally a rebase of https://github.com/bevyengine/bevy/pull/3446. Work was originally done by mfdorst, who should receive considerable credit. Then the error types were extensively reworked by targrub.
## Migration Guide
`AxisSettings` now has a `new()`, which may return an `AxisSettingsError`.
`AxisSettings` fields made private; now must be accessed through getters and setters. There's a dead zone, from `.deadzone_upperbound()` to `.deadzone_lowerbound()`, and a live zone, from `.deadzone_upperbound()` to `.livezone_upperbound()` and from `.deadzone_lowerbound()` to `.livezone_lowerbound()`.
`AxisSettings` setters no longer panic.
`ButtonSettings` fields made private; now must be accessed through getters and setters.
`ButtonSettings` now has a `new()`, which may return a `ButtonSettingsError`.
Co-authored-by: targrub <62773321+targrub@users.noreply.github.com>
# Objective
- Trying to make it possible to do write tests that don't require a raw window handle.
- Fixes https://github.com/bevyengine/bevy/issues/6106.
## Solution
- Make the interface and type changes. Avoid accessing `None`.
---
## Changelog
- Converted `raw_window_handle` field in both `Window` and `ExtractedWindow` to `Option<RawWindowHandleWrapper>`.
- Revised accessor function `Window::raw_window_handle()` to return `Option<RawWindowHandleWrapper>`.
- Skip conditions in loops that would require a raw window handle (to create a `Surface`, for example).
## Migration Guide
`Window::raw_window_handle()` now returns `Option<RawWindowHandleWrapper>`.
Co-authored-by: targrub <62773321+targrub@users.noreply.github.com>
As suggested in #6104, it would be nice to link directly to `linux_dependencies.md` file in the panic message when running on Linux. And when not compiling for Linux, we fall back to the old message.
Signed-off-by: Lena Milizé <me@lvmn.org>
# Objective
Resolves#6104.
## Solution
Add link to `linux_dependencies.md` when compiling for Linux, and fall back to the old one when not.
# Objective
- Fixes#6206
## Solution
- Create a constructor for creating `ReflectComponent` and `ReflectResource`
---
## Changelog
> This section is optional. If this was a trivial fix, or has no externally-visible impact, you can delete this section.
### Added
- Created constructors for `ReflectComponent` and `ReflectResource`, allowing for advanced scripting use-cases.
# Objective
There is currently no good way of getting the width (# of components) of a table outside of `bevy_ecs`.
# Solution
Added the methods `Table::{component_count, component_capacity}`
For consistency and clarity, renamed `Table::{len, capacity}` to `entity_count` and `entity_capacity`.
## Changelog
- Added the methods `Table::component_count` and `Table::component_capacity`
- Renamed `Table::len` and `Table::capacity` to `entity_count` and `entity_capacity`
## Migration Guide
Any use of `Table::len` should now be `Table::entity_count`. Any use of `Table::capacity` should now be `Table::entity_capacity`.
As mentioned in #2926, it's better to have an explicit type that clearly communicates the intent of the timer mode rather than an opaque boolean, which can be only understood when knowing the signature or having to look up the documentation.
This also opens up a way to merge different timers, such as `Stopwatch`, and possibly future ones, such as `DiscreteStopwatch` and `DiscreteTimer` from #2683, into one struct.
Signed-off-by: Lena Milizé <me@lvmn.org>
# Objective
Fixes#2926.
## Solution
Introduce `TimerMode` which replaces the `bool` argument of `Timer` constructors. A `Default` value for `TimerMode` is `Once`.
---
## Changelog
### Added
- `TimerMode` enum, along with variants `TimerMode::Once` and `TimerMode::Repeating`
### Changed
- Replace `bool` argument of `Timer::new` and `Timer::from_seconds` with `TimerMode`
- Change `repeating: bool` field of `Timer` with `mode: TimerMode`
## Migration Guide
- Replace `Timer::new(duration, false)` with `Timer::new(duration, TimerMode::Once)`.
- Replace `Timer::new(duration, true)` with `Timer::new(duration, TimerMode::Repeating)`.
- Replace `Timer::from_seconds(seconds, false)` with `Timer::from_seconds(seconds, TimerMode::Once)`.
- Replace `Timer::from_seconds(seconds, true)` with `Timer::from_seconds(seconds, TimerMode::Repeating)`.
- Change `timer.repeating()` to `timer.mode() == TimerMode::Repeating`.
# Objective
- Add a way to iterate over all entities from &World
## Solution
- Added a function `iter_entities` on World which returns an iterator of `Entity` derived from the entities in the `World`'s `archetypes`
---
## Changelog
- Added a function `iter_entities` on World, allowing iterating over all entities in contexts where you only have read-only access to the World.
# Objective
Fixes#5820
## Solution
Change field name and documentation from `bevy::ui::Node` struct
---
## Changelog
`bevy::ui::Node` `size` field has renamed to `calculated_size`
## Migration Guide
All references to the old `size` name has been changed, to access `bevy::ui::Node` `size` field use `calculated_size`
Bevy's coordinate system is right-handed Y up, so +Z points towards my nose and I'm looking in the -Z direction. Therefore, `Transform::looking_at/look_at` must be pointing towards -Z. Or am I wrong here?
# Objective
- make it easier to build dynamic scenes
## Solution
- add a builder to create a dynamic scene from a world. it can extract an entity or an iterator of entities
- alternative to #6013, leaving the "hierarchy iteration" part to #6185 which does it better
- alternative to #6004
- using a builder makes it easier to chain several extractions
# Objective
> System chaining is a confusing name: it implies the ability to construct non-linear graphs, and suggests a sense of system ordering that is only incidentally true. Instead, it actually works by passing data from one system to the next, much like the pipe operator.
> In the accepted [stageless RFC](https://github.com/bevyengine/rfcs/blob/main/rfcs/45-stageless.md), this concept is renamed to piping, and "system chaining" is used to construct groups of systems with ordering dependencies between them.
Fixes#6225.
## Changelog
System chaining has been renamed to system piping to improve clarity (and free up the name for new ordering APIs).
## Migration Guide
The `.chain(handler_system)` method on systems is now `.pipe(handler_system)`.
The `IntoChainSystem` trait is now `IntoPipeSystem`, and the `ChainSystem` struct is now `PipeSystem`.
