# Objective
Animation docs could use some clarification regarding:
- how exactly curves are evaluated
- how additive blend nodes actually work
## Solution
Add some documentation that explains how curve domains are used and how
additive blend nodes treat their children.
## Commentary
The way additive blend nodes work right now is a little bit weird, since
their first child's weight is ignored. Arguably this makes sense, since
additive animations are authored differently from ordinary animations,
but it also feels a bit strange. We could make the first node's weight
actually be applied, and the present behavior would be recovered when
the weight is set to 1.
The main disadvantage of how things are set up now is that combining a
bunch of additive animations without a base pose is pretty awkward (e.g.
to add them onto a base pose later in the graph). If we changed it, the
main downside would be that reusing the same animation on different
parts of the graph is harder; on the other hand, the weights can be
locally reassigned by using blend nodes with no other children, which
rectifies this shortfall.
# Objective
Fixes#15832
## Solution
It seems that this was just a transliteration mistake during #15591.
Update the correct text span index.
## Testing
I tested on macos with:
`cargo run --example gamepad_viewer`
- without gamepad connected
- with gamepad connected
- disconnecting and reconnecting gamepad while running
# Objective
The `minimising` example is a bit annoying to run locally, because it
attempts to minimize the window every frame, so un-minimizing it is
difficult.
## Solution
Only minimize once.
The contents of the example can now be inspected, and the window easily
closed after the minimization happens.
## Testing
`cargo run --example minimising`
I tested on macos only.
---------
Co-authored-by: François Mockers <francois.mockers@vleue.com>
# Objective
Fixes a mistake in the migration done in #15591.
## Solution
Restore a line of instructions that was accidentally dropped.
## Testing
`cargo run --example motion_blur`
Tested that instructions make sense and text updates correctly when keys
are pressed.
# Objective
This example uses `println` from a system, which we don't advise people
do. It also gives no context for the debug prints, which I assumed to be
stray debug code at first.
## Solution
Use `info!`, and add a small amount of context so the console output
looks deliberate.
## Testing
`cargo run --example morph_targets`
# Objective
- Fixes#15840
## Solution
Added a new subcommand to the CI tool, `compile-check-no-std`, which
will attempt to compile each `no_std` crate in Bevy with the appropriate
features (no-defaults, `libm`, etc.) for `x86_64-unknown-none`. The
exact target chosen could be changed to any reasonable platform which
does not include the `std` library.
The currently tested crates are:
- `bevy_ptr`
- `bevy_utils`
- `bevy_mikktspace`
As more crates have `no_std` support added, they _should_ be added to
this CI command. Once Bevy itself can be `no_std`, the individual checks
can be replaced with just checking Bevy, since it will transiently check
all other crates as appropriate.
## Testing
- Ran CI. From a clean target directory (`cargo clean`), these new
checks take approximately 10 seconds total.
---------
Co-authored-by: François Mockers <francois.mockers@vleue.com>
# Objective
On mobile devices, it's best to use the OS's native logging due to the
difficulty of accessing the console. This is already done for Android.
This is an updated version of
https://github.com/bevyengine/bevy/pull/4462.
## Solution
This PR uses Absolucy's
[tracing-oslog](https://github.com/Absolucy/tracing-oslog) ([ZLib
license](https://github.com/Absolucy/tracing-oslog/blob/main/LICENSE.md))
for iOS in order to use Apple's `os_log`.
## Testing
I ran `examples/mobile` with the logging from `examples/app/logs.rs` on
an iOS device, I then checked the logs could be filtered in the MacOS
Console.app.
## Changelog
- Change bevy_log to use Apple's os_log on iOS.
## Questions for Reviewers
It's worth noting that the dependency this adds hasn't had bug fixes
released in a few years, so we may want to consider one or more of:
1. a feature flag to opt-in, and it would also allow `os_log` on MacOS
2. merge as-is and have some (minor?) upstream bugs
3. hold off on this PR until a suitable alternative dependency arises
4. maintain our own implementation
## Future work
In a follow-up PR it might be good to make the `subsystem` field have a
better default value, like [this
one](https://github.com/bevyengine/bevy/blob/main/examples/mobile/bevy_mobile_example.xcodeproj/project.pbxproj#L363).
That value can be retrieved programmatically if we bind another system
API (For posterity in Swift this is `Bundle.main.bundleIdentifier`, but
the C/ObjC equivalent is likely easier to bind). This would almost
always be the correct value, while the current default is unlikely to
ever be correct.
---------
Co-authored-by: Dusty DeWeese <dustin.deweese@gmail.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
Co-authored-by: François Mockers <francois.mockers@vleue.com>
# Objective
Since #15641, `loading_screen` panics.
```
called `Result::unwrap()` on an `Err` value: MultipleEntities("bevy_ecs::query::state::QueryState<&mut bevy_render::view::visibility::Visibility, bevy_ecs::query::filter::With<loading_screen::LoadingScreen>>")
```
Before that PR, the camera did not have a `Visibility` component. But
`Visibility` is now a required component of `Camera`. So the query
matches multiple entities.
## Solution
Minimal change to make the example behave like it used to.
Plus a tiny drive-by cleanup to remove a redundant unwrap.
## Testing
`cargo run --example loading_screen`
# Objective
Oftentimes, users will store an entity on a component or resource. To
make this component/resource `Default`-able, they might initialize it
with `Entity::PLACEHOLDER`. This is sometimes done to avoid the need for
an `Option<Entity>`, especially if it complicates other logic.
For example, it's used in this `Selection` resource to denote "no
selection":
```rust
#[derive(Resource, Debug)]
struct Selection(Entity);
impl Default for Selection {
fn default() -> Self {
Self(Entity::PLACEHOLDER)
}
}
```
The problem is that if we try to `Debug` the current `Selection`, we get
back: `4294967295v1#8589934591`. It's not immediately obvious whether or
not the entity is an actual entity or the placeholder.
Now while it doesn't take long to realize that this is in fact just the
value of `Entity::PLACEHOLDER`, it would be a lot clearer if this was
made explicit, especially for these particular use cases.
## Solution
This PR makes the `Debug` and `Display` impls for `Entity` return
`PLACEHOLDER` for the `Entity::PLACEHOLDER` constant.
~~Feel free to bikeshed the actual value returned here. I think
`PLACEHOLDER` on its own could work too.~~ Swapped to `PLACEHOLDER` from
`Entity::PLACEHOLDER`.
## Testing
You can test locally by running:
```
cargo test --package bevy_ecs
```
---
## Migration Guide
The `Debug` and `Display` impls for `Entity` now return `PLACEHOLDER`
for the `Entity::PLACEHOLDER` constant. If you had any code relying on
these values, you may need to account for this change.
# Objective
- Immediate mode gizmos don't have a main world entity but the phase
items require `MainEntity` since #15756
## Solution
- Add a dummy `MainEntity` component.
## Testing
Both the `3d_gizmos` and `2d_gizmos` examples show gizmos again
# Objective
The other `Curve -> AnimationCurve` wrappers allow public access to the
inner curve, so this one should as well.
## Solution
Made the field public. Instances will still need to be constructed using
the (more ergonomic) `from_curve` method, which infers the phantom type
for the user.
# Objective
- We don't have to `collect` and `sort` invisible sprites in
`sprite_picking` system.
## Solution
- Filter by `ViewVisibility::get()` earlier
## Testing
- `sprite_picking` example still works.
# Objective
In the Render World, there are a number of collections that are derived
from Main World entities and are used to drive rendering. The most
notable are:
- `VisibleEntities`, which is generated in the `check_visibility` system
and contains visible entities for a view.
- `ExtractedInstances`, which maps entity ids to asset ids.
In the old model, these collections were trivially kept in sync -- any
extracted phase item could look itself up because the render entity id
was guaranteed to always match the corresponding main world id.
After #15320, this became much more complicated, and was leading to a
number of subtle bugs in the Render World. The main rendering systems,
i.e. `queue_material_meshes` and `queue_material2d_meshes`, follow a
similar pattern:
```rust
for visible_entity in visible_entities.iter::<With<Mesh2d>>() {
let Some(mesh_instance) = render_mesh_instances.get_mut(visible_entity) else {
continue;
};
// Look some more stuff up and specialize the pipeline...
let bin_key = Opaque2dBinKey {
pipeline: pipeline_id,
draw_function: draw_opaque_2d,
asset_id: mesh_instance.mesh_asset_id.into(),
material_bind_group_id: material_2d.get_bind_group_id().0,
};
opaque_phase.add(
bin_key,
*visible_entity,
BinnedRenderPhaseType::mesh(mesh_instance.automatic_batching),
);
}
```
In this case, `visible_entities` and `render_mesh_instances` are both
collections that are created and keyed by Main World entity ids, and so
this lookup happens to work by coincidence. However, there is a major
unintentional bug here: namely, because `visible_entities` is a
collection of Main World ids, the phase item being queued is created
with a Main World id rather than its correct Render World id.
This happens to not break mesh rendering because the render commands
used for drawing meshes do not access the `ItemQuery` parameter, but
demonstrates the confusion that is now possible: our UI phase items are
correctly being queued with Render World ids while our meshes aren't.
Additionally, this makes it very easy and error prone to use the wrong
entity id to look up things like assets. For example, if instead we
ignored visibility checks and queued our meshes via a query, we'd have
to be extra careful to use `&MainEntity` instead of the natural
`Entity`.
## Solution
Make all collections that are derived from Main World data use
`MainEntity` as their key, to ensure type safety and avoid accidentally
looking up data with the wrong entity id:
```rust
pub type MainEntityHashMap<V> = hashbrown::HashMap<MainEntity, V, EntityHash>;
```
Additionally, we make all `PhaseItem` be able to provide both their Main
and Render World ids, to allow render phase implementors maximum
flexibility as to what id should be used to look up data.
You can think of this like tracking at the type level whether something
in the Render World should use it's "primary key", i.e. entity id, or
needs to use a foreign key, i.e. `MainEntity`.
## Testing
##### TODO:
This will require extensive testing to make sure things didn't break!
Additionally, some extraction logic has become more complicated and
needs to be checked for regressions.
## Migration Guide
With the advent of the retained render world, collections that contain
references to `Entity` that are extracted into the render world have
been changed to contain `MainEntity` in order to prevent errors where a
render world entity id is used to look up an item by accident. Custom
rendering code may need to be changed to query for `&MainEntity` in
order to look up the correct item from such a collection. Additionally,
users who implement their own extraction logic for collections of main
world entity should strongly consider extracting into a different
collection that uses `MainEntity` as a key.
Additionally, render phases now require specifying both the `Entity` and
`MainEntity` for a given `PhaseItem`. Custom render phases should ensure
`MainEntity` is available when queuing a phase item.
# Objective
Fixes#15828
## Solution
Ran the example to generate `load_scene_example-new.scn.ron` and
replaced `load_scene_example.scn.ron` with the contents.
## Testing
`cargo run --example scene`
# Objective
Fixes#15824
## Solution
Looks like this was just a goof in migrating the example itself.
Added back in the rotation component of the transform that got dropped.
## Testing
`cargo run --example auto_exposure`
# Objective
I tried to improve gitignore. I am not a programming expert yet, so I
don't know all the junk files. If someone provides me with a list of
other files, can you point me to it below? I also tried to sort them
logically, hope it works.
> This is also my first PR in the history of this engine. and I'm very
happy 😄
# Objective
- Closes#15716
- Closes#15718
## Solution
- Replace `Handle<MeshletMesh>` with a new `MeshletMesh3d` component
- As expected there were some random things that needed fixing:
- A couple tests were storing handles just to prevent them from being
dropped I believe, which seems to have been unnecessary in some.
- The `SpriteBundle` still had a `Handle<Image>` field. I've removed
this.
- Tests in `bevy_sprite` incorrectly added a `Handle<Image>` field
outside of the `Sprite` component.
- A few examples were still inserting `Handle`s, switched those to their
corresponding wrappers.
- 2 examples that were still querying for `Handle<Image>` were changed
to query `Sprite`
## Testing
- I've verified that the changed example work now
## Migration Guide
`Handle` can no longer be used as a `Component`. All existing Bevy types
using this pattern have been wrapped in their own semantically
meaningful type. You should do the same for any custom `Handle`
components your project needs.
The `Handle<MeshletMesh>` component is now `MeshletMesh3d`.
The `WithMeshletMesh` type alias has been removed. Use
`With<MeshletMesh3d>` instead.
# Objective
If a `Resource` implements `FromWorld` or `Default`, it's nicer to be
able to write:
```rust
let foo = world.get_resource_or_init::<Foo>();
```
Rather than:
```rust
let foo = world.get_resource_or_insert_with(Foo::default);
```
The latter is also not possible if a type implements `FromWorld` only,
and not `Default`.
## Solution
Added:
```rust
impl World {
pub fn get_resource_or_init<R: Resource + FromWorld>(&mut self) -> Mut<'_, R>;
}
```
Turns out all current in-engine uses of `get_resource_or_insert_with`
are exactly the above, so they've also been replaced.
## Testing
- Added a doc-test.
- Also added a doc-test for `World::get_resource_or_insert_with`.
In order to create texture atlases from other systems (custom game
solutions) that are compatible with the ones generated by the bevy
builders, it would be nice to have the interface be fully public. This
field is pub(crate). Unless there's a good reason, can we promote this
to pub?
Alternatives:
- Don't do it.
**Ready for review. Examples migration progress: 100%.**
# Objective
- Implement https://github.com/bevyengine/bevy/discussions/15014
## Solution
This implements [cart's
proposal](https://github.com/bevyengine/bevy/discussions/15014#discussioncomment-10574459)
faithfully except for one change. I separated `TextSpan` from
`TextSpan2d` because `TextSpan` needs to require the `GhostNode`
component, which is a `bevy_ui` component only usable by UI.
Extra changes:
- Added `EntityCommands::commands_mut` that returns a mutable reference.
This is a blocker for extension methods that return something other than
`self`. Note that `sickle_ui`'s `UiBuilder::commands` returns a mutable
reference for this reason.
## Testing
- [x] Text examples all work.
---
## Showcase
TODO: showcase-worthy
## Migration Guide
TODO: very breaking
### Accessing text spans by index
Text sections are now text sections on different entities in a
hierarchy, Use the new `TextReader` and `TextWriter` system parameters
to access spans by index.
Before:
```rust
fn refresh_text(mut query: Query<&mut Text, With<TimeText>>, time: Res<Time>) {
let text = query.single_mut();
text.sections[1].value = format_time(time.elapsed());
}
```
After:
```rust
fn refresh_text(
query: Query<Entity, With<TimeText>>,
mut writer: UiTextWriter,
time: Res<Time>
) {
let entity = query.single();
*writer.text(entity, 1) = format_time(time.elapsed());
}
```
### Iterating text spans
Text spans are now entities in a hierarchy, so the new `UiTextReader`
and `UiTextWriter` system parameters provide ways to iterate that
hierarchy. The `UiTextReader::iter` method will give you a normal
iterator over spans, and `UiTextWriter::for_each` lets you visit each of
the spans.
---------
Co-authored-by: ickshonpe <david.curthoys@googlemail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
# Objective
- Another step towards #15716
- Remove trait implementations that are dependent on `Handle<T>` being a
`Component`
## Solution
- Remove unused `ExtractComponent` trait implementation for `Handle<T>`
- Remove unused `ExtractInstance` trait implementation for `AssetId`
- Although the `ExtractInstance` trait wasn't used, the `AssetId`s were
being stored inside of `ExtractedInstances` which has an
`ExtractInstance` trait bound on its contents.
I've upgraded the `RenderMaterialInstances` type alias to be its own
resource, identical to `ExtractedInstances<AssetId<M>>` to get around
that with minimal breakage.
## Testing
Tested `many_cubes`, rendering did not explode
# Objective
A bunch of code is used only if you care about the `Curve` trait. Put it
behind a feature so it can be ignored if wanted.
## Solution
Added a default feature `curve` to `bevy_math` which feature-gates the
`curve` module and internal integrations.
## Testing
Tested compiling with the feature enabled and disabled.
# Objective
Continue migration of bevy APIs to required components, following
guidance of https://hackmd.io/@bevy/required_components/
## Solution
- Make `Sprite` require `Transform` and `Visibility` and
`SyncToRenderWorld`
- move image and texture atlas handles into `Sprite`
- deprecate `SpriteBundle`
- remove engine uses of `SpriteBundle`
## Testing
ran cargo tests on bevy_sprite and tested several sprite examples.
---
## Migration Guide
Replace all uses of `SpriteBundle` with `Sprite`. There are several new
convenience constructors: `Sprite::from_image`,
`Sprite::from_atlas_image`, `Sprite::from_color`.
WARNING: use of `Handle<Image>` and `TextureAtlas` as components on
sprite entities will NO LONGER WORK. Use the fields on `Sprite` instead.
I would have removed the `Component` impls from `TextureAtlas` and
`Handle<Image>` except it is still used within ui. We should fix this
moving forward with the migration.
# Objective
- Closes#15752
Calling the functions `App::observe` and `World::observe` doesn't make
sense because you're not "observing" the `App` or `World`, you're adding
an observer that listens for an event that occurs *within* the `World`.
We should rename them to better fit this.
## Solution
Renames:
- `App::observe` -> `App::add_observer`
- `World::observe` -> `World::add_observer`
- `Commands::observe` -> `Commands::add_observer`
- `EntityWorldMut::observe_entity` -> `EntityWorldMut::observe`
(Note this isn't a breaking change as the original rename was introduced
earlier this cycle.)
## Testing
Reusing current tests.
