Commit Graph

22 Commits

Author SHA1 Message Date
Martín Maita a80470f5ec Update Rodio to 0.22 (#20323)
# Objective

- Closes #19672 

## Solution

- Updated both `cpal` and `rodio` to their latest versions.
- Updated code to address `rodio`'s breaking changes.
- Reworked audio related feature flags. NOTE: `symphonia` will only be
the default backend for formats with no alternative fallback.
- Added `audio-all-formats` feature collection to easily enable all the
available audio formats using their default backends.
- Replaced `aarch64-apple-ios-sim` target with
`arm64-apple-ios-simulator`.

## Testing

- Tested audio related examples.
- CI checks passing.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Rob Parrett <robparrett@gmail.com>
2026-03-24 23:31:06 +00:00
Gonçalo Rica Pais da Silva f255b8e57a Upgrade glam, hexasphere, rand & uuid to latest versions (#22928)
# Objective

- `glam`, `hexasphere` & `rand` have released their latest versions,
update Bevy to support them.

## Solution

- The above have been updated to their compatible versions. `rand_distr`
updated as well to match `rand` v0.10 support.
- `rand_chacha` is soft deprecated and no longer used by `rand`, so its
usage has been changed to `chacha20` to match `rand` dep tree.
- `uuid` is in the process of updating to `getrandom` v0.4, which `rand`
v0.10 supports. This PR remains in draft until a new `uuid` release hits
crates.io.
- `RngCore` is now `Rng`, and `Rng` is now `RngExt`, so this required
updating across many files.
- `choose_multiple` method is deprecated, changed to `sample`.

## Testing

- Chase all compiler errors, since this should not regress any already
existing behaviour.
- This must pass CI without regressions.

## Additional Notes

`getrandom` v0.4 doesn't add anything new for Web WASM support, so the
same `wasm_js` feature is used.
2026-02-19 22:17:25 +00:00
ickshonpe 6ca4769128 Minimal responsive FontSize support (#22614)
# Objective

Add responsive font sizes supporting rem and viewport units to
`bevy_text` with minimal changes to the APIs and systems.

## Solution

Introduce a new `FontSize` enum:

```rust
pub enum FontSize {
    /// Font Size in logical pixels.
    Px(f32),
    /// Font size as a percentage of the viewport width.
    Vw(f32),
    /// Font size as a percentage of the viewport height.
    Vh(f32),
    /// Font size as a percentage of the smaller of the viewport width and height.
    VMin(f32),
    /// Font size as a percentage of the larger of the viewport width and height.
    VMax(f32),
    /// Font Size relative to the value of the `RemSize` resource.
    Rem(f32),
}
```

This replaces the `f32` value of `TextFont`'s `font_size` field.

The viewport variants work the same way as their respective `Val`
counterparts.

`Rem` values are multiplied by the value of the `RemSize` resource
(which newtypes an `f32`).

`FontSize` provides an `eval` method that takes a logical viewport size
and rem base size and returns an `f32` logical font size. The resolved
logical font size is then written into the `Attributes` passed to Cosmic
Text by `TextPipeline::update_buffer`.

Any text implementation using `bevy_text` must now provide viewport and
rem base values when calling `TextPipeline::update_buffer` or
`create_measure`.

`Text2d` uses the size of the primary window to resolve viewport values
(or `Vec2::splat(1000)` if no primary window is found). This is a
deliberate compromise, a single `Text2d` can be rendered to multiple
viewports using `RenderLayers`, so it's difficult to find a rule for
which viewport size should be chosen.

### Change detection 

`ComputedTextBlock` has two new fields: `uses_viewport_sizes` and
`uses_rem_sizes`, which are set to true in `TextPipeline::update_buffer`
iff any text section in the block uses viewport or rem font sizes,
respectively.

The `ComputedTextBlock::needs_rerender` method has been modified to take
take two bool parameters:
```rust
    pub fn needs_rerender(
        &self,
        is_viewport_size_changed: bool,
        is_rem_size_changed: bool,
    ) -> bool {
        self.needs_rerender
            || (is_viewport_size_changed && self.uses_viewport_sizes)
            || (is_rem_size_changed && self.uses_rem_sizes)
    }
 ```
This ensures that text reupdates will also be scheduled if one of the text section's uses a viewport font size and the local viewport size changed, or if one of the text section's uses a rem font size and the rem size changed.

#### Limitations

There are some limitations because we don't have any sort of font style inheritance yet:

* "rem" units aren't proper rem units, and just based on the value of a resource. 
* "em" units are resolved based on inherited font size, so can't be implemented without inheritance support.

#### Notes

* This PR is quite small and not very technical. Reviewers don't need to be especially familiar with `bevy_text`. Most of the changes are to the examples.

* We could consider using `Val` instead of `FontSize`, then we could use `Val`'s constructor functions which would be much nicer, but some variants might not have sensible interpretations in both UI and Text2d contexts. Also we'd have to make `Val` accessible to `bevy_text`.

## Testing

The changes to the text systems are relatively trivial and easy to understand.  I already added a minor change to the `text` example to use `Vh` font size for the "hello bevy" text in the bottom right corner. If you change the size of the window, you should see the text change size in response. The text initially flickers before it updates because of some unrelated asset/image changes that mean that font textures aren't ready until the frame after the text update that changes the font size.

Most of the example migrations were automated using regular expressions, and there are bound to be mistakes in those changes. It's infeasible to check every single example thoroughly, but it's early enough in the release cycle that I don't think we should be too worried if a few bugs slip in.

---------

Co-authored-by: Kevin Chen <chen.kevin.f@gmail.com>
2026-02-02 22:52:33 +00:00
Aevyrie a88af65738 Contact Shadows (#22382)
# Objective

- Implement contact shadows to add fine shadow detail where shadow
cascades cannot.

## Solution

- Extend our existing pbr implementation using our existing raymarching
functions.

---

## Showcase

<img width="1824" height="1180" alt="image"
src="https://github.com/user-attachments/assets/e93b79c5-c596-4a9e-b94d-20bdde1d863b"
/>

<img width="1824" height="1180" alt="image"
src="https://github.com/user-attachments/assets/0fd7dffa-60b8-4b92-8fad-7f993d4d89dd"
/>


https://github.com/user-attachments/assets/e74b190d-9ae3-4aaf-97f0-b520930a0667


https://github.com/user-attachments/assets/e80ccb26-bbaa-4d25-a823-8ea12354c5b9


https://github.com/user-attachments/assets/b04f4b00-92bd-4a2f-b7dd-5157d8fbe0ab

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/b7629908-dd32-48db-8ee7-a4d2dd8f66c2"
/>

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/3de0258e-9191-4180-ac57-41b32e1205bd"
/>

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/951477f9-e9a9-426f-ae8d-18ae50cc7b85"
/>

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/2291453c-da57-4fcc-a6b0-f60f6eac6cbb"
/>

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/5820cdff-ea54-4294-b520-2a8d8dc24996"
/>

<img width="1073" height="685" alt="image"
src="https://github.com/user-attachments/assets/3ea16481-7689-4e99-87e2-1589f1532e4c"
/>

---------

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: charlotte 🌸 <charlotte.c.mcelwain@gmail.com>
2026-01-13 21:51:39 +00:00
TheBlckbird 13877fa84d Add a new trait to accept more types in the Val-helper functions (#20551)
# Objective

- Allow the `Val`-helper functions to accept more types besides just
`f32`

Fixes #20549

## Solution

- Adds a new trait that can be implemented for numbers
- That trait has a method that converts `self` to `f32`

## Testing

- I tested it using Rust's testing framework (although I didn't leave
the tests in, as I don't deem them important enough)

<details>
  <summary>Rust test</summary>

```rust
#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_val_helpers_work() {
        let p = px(10_u8);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_u16);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_u32);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_u64);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_u128);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_i8);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_i16);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_i32);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_i64);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10_i128);
        assert_eq!(p, Val::Px(10.0));

        let p = px(10.3_f32);
        assert_eq!(p, Val::Px(10.3));

        let p = px(10.6_f64);
        assert_eq!(p, Val::Px(10.6));
    }
}
```
</details>

---

## Showcase

```rust
// Same as Val::Px(10.)
px(10);
px(10_u8);
px(10.0);
```
2025-08-29 20:18:57 +00:00
Jan Hohenheim 36fb83fa42 Port the physics in fixed timestep example to 3D (#20089)
# Objective

Since I originally wrote this example, many people on Discord have asked
me specifically how to handle camera movement in and around fixed
timesteps. I had to write that information up maaaany times, so I
believe this is an area where the example falls short of.

## Solution

Let's port the example to 3D, where we can better showcase how to handle
the camera. The knowledge is trivially transferable to 2D :)
Also, we don't need to average out continuous input. Just using the last
one is fine in practice. Still, we need to keep around the
`AccumulatedInput` resource for things like jumping.

## Testing


https://github.com/user-attachments/assets/c1306d36-1f94-43b6-b8f6-af1cbb622698

## Notes

- The current implementation is extremely faithful to how it will look
like in practice when writing a 3D game using e.g. Avian. With the
exception that Avian does the part with the actual physics of course
- I'd love to showcase how to map sequences of inputs to fixed updates,
but winit does not export timestamps
- I'd also like to showcase instantaneous inputs like activating a boost
or shooting a laser, but that would make the example even bigger
- Not locking the cursor because doing so correctly on Wasm in the
current Bevy version is not trivial at all

---------

Co-authored-by: Joona Aalto <jondolf.dev@gmail.com>
2025-07-14 21:20:19 +00:00
Joona Aalto 7b1c9f192e Adopt consistent FooSystems naming convention for system sets (#18900)
# Objective

Fixes a part of #14274.

Bevy has an incredibly inconsistent naming convention for its system
sets, both internally and across the ecosystem.

<img alt="System sets in Bevy"
src="https://github.com/user-attachments/assets/d16e2027-793f-4ba4-9cc9-e780b14a5a1b"
width="450" />

*Names of public system set types in Bevy*

Most Bevy types use a naming of `FooSystem` or just `Foo`, but there are
also a few `FooSystems` and `FooSet` types. In ecosystem crates on the
other hand, `FooSet` is perhaps the most commonly used name in general.
Conventions being so wildly inconsistent can make it harder for users to
pick names for their own types, to search for system sets on docs.rs, or
to even discern which types *are* system sets.

To reign in the inconsistency a bit and help unify the ecosystem, it
would be good to establish a common recommended naming convention for
system sets in Bevy itself, similar to how plugins are commonly suffixed
with `Plugin` (ex: `TimePlugin`). By adopting a consistent naming
convention in first-party Bevy, we can softly nudge ecosystem crates to
follow suit (for types where it makes sense to do so).

Choosing a naming convention is also relevant now, as the [`bevy_cli`
recently adopted
lints](https://github.com/TheBevyFlock/bevy_cli/pull/345) to enforce
naming for plugins and system sets, and the recommended naming used for
system sets is still a bit open.

## Which Name To Use?

Now the contentious part: what naming convention should we actually
adopt?

This was discussed on the Bevy Discord at the end of last year, starting
[here](<https://discord.com/channels/691052431525675048/692572690833473578/1310659954683936789>).
`FooSet` and `FooSystems` were the clear favorites, with `FooSet` very
narrowly winning an unofficial poll. However, it seems to me like the
consensus was broadly moving towards `FooSystems` at the end and after
the poll, with Cart
([source](https://discord.com/channels/691052431525675048/692572690833473578/1311140204974706708))
and later Alice
([source](https://discord.com/channels/691052431525675048/692572690833473578/1311092530732859533))
and also me being in favor of it.

Let's do a quick pros and cons list! Of course these are just what I
thought of, so take it with a grain of salt.

`FooSet`:

- Pro: Nice and short!
- Pro: Used by many ecosystem crates.
- Pro: The `Set` suffix comes directly from the trait name `SystemSet`.
- Pro: Pairs nicely with existing APIs like `in_set` and
`configure_sets`.
- Con: `Set` by itself doesn't actually indicate that it's related to
systems *at all*, apart from the implemented trait. A set of what?
- Con: Is `FooSet` a set of `Foo`s or a system set related to `Foo`? Ex:
`ContactSet`, `MeshSet`, `EnemySet`...

`FooSystems`:

- Pro: Very clearly indicates that the type represents a collection of
systems. The actual core concept, system(s), is in the name.
- Pro: Parallels nicely with `FooPlugins` for plugin groups.
- Pro: Low risk of conflicts with other names or misunderstandings about
what the type is.
- Pro: In most cases, reads *very* nicely and clearly. Ex:
`PhysicsSystems` and `AnimationSystems` as opposed to `PhysicsSet` and
`AnimationSet`.
- Pro: Easy to search for on docs.rs.
- Con: Usually results in longer names.
- Con: Not yet as widely used.

Really the big problem with `FooSet` is that it doesn't actually
describe what it is. It describes what *kind of thing* it is (a set of
something), but not *what it is a set of*, unless you know the type or
check its docs or implemented traits. `FooSystems` on the other hand is
much more self-descriptive in this regard, at the cost of being a bit
longer to type.

Ultimately, in some ways it comes down to preference and how you think
of system sets. Personally, I was originally in favor of `FooSet`, but
have been increasingly on the side of `FooSystems`, especially after
seeing what the new names would actually look like in Avian and now
Bevy. I prefer it because it usually reads better, is much more clearly
related to groups of systems than `FooSet`, and overall *feels* more
correct and natural to me in the long term.

For these reasons, and because Alice and Cart also seemed to share a
preference for it when it was previously being discussed, I propose that
we adopt a `FooSystems` naming convention where applicable.

## Solution

Rename Bevy's system set types to use a consistent `FooSet` naming where
applicable.

- `AccessibilitySystem` → `AccessibilitySystems`
- `GizmoRenderSystem` → `GizmoRenderSystems`
- `PickSet` → `PickingSystems`
- `RunFixedMainLoopSystem` → `RunFixedMainLoopSystems`
- `TransformSystem` → `TransformSystems`
- `RemoteSet` → `RemoteSystems`
- `RenderSet` → `RenderSystems`
- `SpriteSystem` → `SpriteSystems`
- `StateTransitionSteps` → `StateTransitionSystems`
- `RenderUiSystem` → `RenderUiSystems`
- `UiSystem` → `UiSystems`
- `Animation` → `AnimationSystems`
- `AssetEvents` → `AssetEventSystems`
- `TrackAssets` → `AssetTrackingSystems`
- `UpdateGizmoMeshes` → `GizmoMeshSystems`
- `InputSystem` → `InputSystems`
- `InputFocusSet` → `InputFocusSystems`
- `ExtractMaterialsSet` → `MaterialExtractionSystems`
- `ExtractMeshesSet` → `MeshExtractionSystems`
- `RumbleSystem` → `RumbleSystems`
- `CameraUpdateSystem` → `CameraUpdateSystems`
- `ExtractAssetsSet` → `AssetExtractionSystems`
- `Update2dText` → `Text2dUpdateSystems`
- `TimeSystem` → `TimeSystems`
- `AudioPlaySet` → `AudioPlaybackSystems`
- `SendEvents` → `EventSenderSystems`
- `EventUpdates` → `EventUpdateSystems`

A lot of the names got slightly longer, but they are also a lot more
consistent, and in my opinion the majority of them read much better. For
a few of the names I took the liberty of rewording things a bit;
definitely open to any further naming improvements.

There are still also cases where the `FooSystems` naming doesn't really
make sense, and those I left alone. This primarily includes system sets
like `Interned<dyn SystemSet>`, `EnterSchedules<S>`, `ExitSchedules<S>`,
or `TransitionSchedules<S>`, where the type has some special purpose and
semantics.

## Todo

- [x] Should I keep all the old names as deprecated type aliases? I can
do this, but to avoid wasting work I'd prefer to first reach consensus
on whether these renames are even desired.
- [x] Migration guide
- [x] Release notes
2025-05-06 15:18:03 +00:00
Zachary Harrold 5241e09671 Upgrade to Rust Edition 2024 (#17967)
# Objective

- Fixes #17960

## Solution

- Followed the [edition upgrade
guide](https://doc.rust-lang.org/edition-guide/editions/transitioning-an-existing-project-to-a-new-edition.html)

## Testing

- CI

---

## Summary of Changes

### Documentation Indentation

When using lists in documentation, proper indentation is now linted for.
This means subsequent lines within the same list item must start at the
same indentation level as the item.

```rust
/* Valid */
/// - Item 1
///   Run-on sentence.
/// - Item 2
struct Foo;

/* Invalid */
/// - Item 1
///     Run-on sentence.
/// - Item 2
struct Foo;
```

### Implicit `!` to `()` Conversion

`!` (the never return type, returned by `panic!`, etc.) no longer
implicitly converts to `()`. This is particularly painful for systems
with `todo!` or `panic!` statements, as they will no longer be functions
returning `()` (or `Result<()>`), making them invalid systems for
functions like `add_systems`. The ideal fix would be to accept functions
returning `!` (or rather, _not_ returning), but this is blocked on the
[stabilisation of the `!` type
itself](https://doc.rust-lang.org/std/primitive.never.html), which is
not done.

The "simple" fix would be to add an explicit `-> ()` to system
signatures (e.g., `|| { todo!() }` becomes `|| -> () { todo!() }`).
However, this is _also_ banned, as there is an existing lint which (IMO,
incorrectly) marks this as an unnecessary annotation.

So, the "fix" (read: workaround) is to put these kinds of `|| -> ! { ...
}` closuers into variables and give the variable an explicit type (e.g.,
`fn()`).

```rust
// Valid
let system: fn() = || todo!("Not implemented yet!");
app.add_systems(..., system);

// Invalid
app.add_systems(..., || todo!("Not implemented yet!"));
```

### Temporary Variable Lifetimes

The order in which temporary variables are dropped has changed. The
simple fix here is _usually_ to just assign temporaries to a named
variable before use.

### `gen` is a keyword

We can no longer use the name `gen` as it is reserved for a future
generator syntax. This involved replacing uses of the name `gen` with
`r#gen` (the raw-identifier syntax).

### Formatting has changed

Use statements have had the order of imports changed, causing a
substantial +/-3,000 diff when applied. For now, I have opted-out of
this change by amending `rustfmt.toml`

```toml
style_edition = "2021"
```

This preserves the original formatting for now, reducing the size of
this PR. It would be a simple followup to update this to 2024 and run
`cargo fmt`.

### New `use<>` Opt-Out Syntax

Lifetimes are now implicitly included in RPIT types. There was a handful
of instances where it needed to be added to satisfy the borrow checker,
but there may be more cases where it _should_ be added to avoid
breakages in user code.

### `MyUnitStruct { .. }` is an invalid pattern

Previously, you could match against unit structs (and unit enum
variants) with a `{ .. }` destructuring. This is no longer valid.

### Pretty much every use of `ref` and `mut` are gone

Pattern binding has changed to the point where these terms are largely
unused now. They still serve a purpose, but it is far more niche now.

### `iter::repeat(...).take(...)` is bad

New lint recommends using the more explicit `iter::repeat_n(..., ...)`
instead.

## Migration Guide

The lifetimes of functions using return-position impl-trait (RPIT) are
likely _more_ conservative than they had been previously. If you
encounter lifetime issues with such a function, please create an issue
to investigate the addition of `+ use<...>`.

## Notes

- Check the individual commits for a clearer breakdown for what
_actually_ changed.

---------

Co-authored-by: François Mockers <francois.mockers@vleue.com>
2025-02-24 03:54:47 +00:00
Carter Anderson 015f2c69ca Merge Style properties into Node. Use ComputedNode for computed properties. (#15975)
# Objective

Continue improving the user experience of our UI Node API in the
direction specified by [Bevy's Next Generation Scene / UI
System](https://github.com/bevyengine/bevy/discussions/14437)

## Solution

As specified in the document above, merge `Style` fields into `Node`,
and move "computed Node fields" into `ComputedNode` (I chose this name
over something like `ComputedNodeLayout` because it currently contains
more than just layout info. If we want to break this up / rename these
concepts, lets do that in a separate PR). `Style` has been removed.

This accomplishes a number of goals:

## Ergonomics wins

Specifying both `Node` and `Style` is now no longer required for
non-default styles

Before:
```rust
commands.spawn((
    Node::default(),
    Style {
        width:  Val::Px(100.),
        ..default()
    },
));
```

After:

```rust
commands.spawn(Node {
    width:  Val::Px(100.),
    ..default()
});
```

## Conceptual clarity

`Style` was never a comprehensive "style sheet". It only defined "core"
style properties that all `Nodes` shared. Any "styled property" that
couldn't fit that mold had to be in a separate component. A "real" style
system would style properties _across_ components (`Node`, `Button`,
etc). We have plans to build a true style system (see the doc linked
above).

By moving the `Style` fields to `Node`, we fully embrace `Node` as the
driving concept and remove the "style system" confusion.

## Next Steps

* Consider identifying and splitting out "style properties that aren't
core to Node". This should not happen for Bevy 0.15.

---

## Migration Guide

Move any fields set on `Style` into `Node` and replace all `Style`
component usage with `Node`.

Before:
```rust
commands.spawn((
    Node::default(),
    Style {
        width:  Val::Px(100.),
        ..default()
    },
));
```

After:

```rust
commands.spawn(Node {
    width:  Val::Px(100.),
    ..default()
});
```

For any usage of the "computed node properties" that used to live on
`Node`, use `ComputedNode` instead:

Before:
```rust
fn system(nodes: Query<&Node>) {
    for node in &nodes {
        let computed_size = node.size();
    }
}
```

After:
```rust
fn system(computed_nodes: Query<&ComputedNode>) {
    for computed_node in &computed_nodes {
        let computed_size = computed_node.size();
    }
}
```
2024-10-18 22:25:33 +00:00
VitalyR eb19a9ea0b Migrate UI bundles to required components (#15898)
# Objective

- Migrate UI bundles to required components, fixes #15889

## Solution

- deprecate `NodeBundle` in favor of `Node`
- deprecate `ImageBundle` in favor of `UiImage`
- deprecate `ButtonBundle` in favor of `Button`

## Testing

CI.

## Migration Guide

- Replace all uses of `NodeBundle` with `Node`. e.g.
```diff
     commands
-        .spawn(NodeBundle {
-            style: Style {
+        .spawn((
+            Node::default(),
+            Style {
                 width: Val::Percent(100.),
                 align_items: AlignItems::Center,
                 justify_content: JustifyContent::Center,
                 ..default()
             },
-            ..default()
-        })
+        ))
``` 
- Replace all uses of `ButtonBundle` with `Button`. e.g.
```diff
                     .spawn((
-                        ButtonBundle {
-                            style: Style {
-                                width: Val::Px(w),
-                                height: Val::Px(h),
-                                // horizontally center child text
-                                justify_content: JustifyContent::Center,
-                                // vertically center child text
-                                align_items: AlignItems::Center,
-                                margin: UiRect::all(Val::Px(20.0)),
-                                ..default()
-                            },
-                            image: image.clone().into(),
+                        Button,
+                        Style {
+                            width: Val::Px(w),
+                            height: Val::Px(h),
+                            // horizontally center child text
+                            justify_content: JustifyContent::Center,
+                            // vertically center child text
+                            align_items: AlignItems::Center,
+                            margin: UiRect::all(Val::Px(20.0)),
                             ..default()
                         },
+                        UiImage::from(image.clone()),
                         ImageScaleMode::Sliced(slicer.clone()),
                     ))
```
- Replace all uses of `ImageBundle` with `UiImage`. e.g.
```diff
-    commands.spawn(ImageBundle {
-        image: UiImage {
+    commands.spawn((
+        UiImage {
             texture: metering_mask,
             ..default()
         },
-        style: Style {
+        Style {
             width: Val::Percent(100.0),
             height: Val::Percent(100.0),
             ..default()
         },
-        ..default()
-    });
+    ));
 ```

---------

Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2024-10-17 21:11:02 +00:00
andristarr 7482a0d26d aligning public apis of Time,Timer and Stopwatch (#15962)
Fixes #15834

## Migration Guide

The APIs of `Time`, `Timer` and `Stopwatch` have been cleaned up for
consistency with each other and the standard library's `Duration` type.
The following methods have been renamed:

- `Stowatch::paused` -> `Stopwatch::is_paused`
- `Time::elapsed_seconds` -> `Time::elasped_secs` (including `_f64` and
`_wrapped` variants)
2024-10-16 21:09:32 +00:00
Pablo Reinhardt d96a9d15f6 Migrate from Query::single and friends to Single (#15872)
# Objective

- closes #15866

## Solution

- Simply migrate where possible.

## Testing

- Expect that CI will do most of the work. Examples is another way of
testing this, as most of the work is in that area.
---

## Notes
For now, this PR doesn't migrate `QueryState::single` and friends as for
now, this look like another issue. So for example, QueryBuilders that
used single or `World::query` that used single wasn't migrated. If there
is a easy way to migrate those, please let me know.

Most of the uses of `Query::single` were removed, the only other uses
that I found was related to tests of said methods, so will probably be
removed when we remove `Query::single`.
2024-10-13 20:32:06 +00:00
ickshonpe 6f7d0e5725 split up TextStyle (#15857)
# Objective

Currently text is recomputed unnecessarily on any changes to its color,
which is extremely expensive.

## Solution
Split up `TextStyle` into two separate components `TextFont` and
`TextColor`.

## Testing

I added this system to `many_buttons`:
```rust
fn set_text_colors_changed(mut colors: Query<&mut TextColor>) {
    for mut text_color in colors.iter_mut() {
        text_color.set_changed();
    }
}
```

reports ~4fps on main, ~50fps with this PR.

## Migration Guide
`TextStyle` has been renamed to `TextFont` and its `color` field has
been moved to a separate component named `TextColor` which newtypes
`Color`.
2024-10-13 17:06:22 +00:00
UkoeHB c2c19e5ae4 Text rework (#15591)
**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>
2024-10-09 18:35:36 +00:00
Emerson Coskey 7d40e3ec87 Migrate bevy_sprite to required components (#15489)
# 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.
2024-10-09 16:17:26 +00:00
Joona Aalto 25bfa80e60 Migrate cameras to required components (#15641)
# Objective

Yet another PR for migrating stuff to required components. This time,
cameras!

## Solution

As per the [selected
proposal](https://hackmd.io/tsYID4CGRiWxzsgawzxG_g#Combined-Proposal-1-Selected),
deprecate `Camera2dBundle` and `Camera3dBundle` in favor of `Camera2d`
and `Camera3d`.

Adding a `Camera` without `Camera2d` or `Camera3d` now logs a warning,
as suggested by Cart [on
Discord](https://discord.com/channels/691052431525675048/1264881140007702558/1291506402832945273).
I would personally like cameras to work a bit differently and be split
into a few more components, to avoid some footguns and confusing
semantics, but that is more controversial, and shouldn't block this core
migration.

## Testing

I ran a few 2D and 3D examples, and tried cameras with and without
render graphs.

---

## Migration Guide

`Camera2dBundle` and `Camera3dBundle` have been deprecated in favor of
`Camera2d` and `Camera3d`. Inserting them will now also insert the other
components required by them automatically.
2024-10-05 01:59:52 +00:00
Joona Aalto 54006b107b Migrate meshes and materials to required components (#15524)
# 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:

![Näyttökuva 2024-09-29
181746](https://github.com/user-attachments/assets/5c8be029-d2fe-4b8c-ae89-17a72ff82c9a)

![Näyttökuva 2024-09-29
181918](https://github.com/user-attachments/assets/58adbc55-5a1e-4c7d-a2c7-ed456227b909)

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>
2024-10-01 21:33:17 +00:00
Joona Aalto de888a373d Migrate lights to required components (#15554)
# Objective

Another step in the migration to required components: lights!

Note that this does not include `EnvironmentMapLight` or reflection
probes yet, because their API hasn't been fully chosen yet.

## Solution

As per the [selected
proposals](https://hackmd.io/@bevy/required_components/%2FLLnzwz9XTxiD7i2jiUXkJg):

- Deprecate `PointLightBundle` in favor of the `PointLight` component
- Deprecate `SpotLightBundle` in favor of the `PointLight` component
- Deprecate `DirectionalLightBundle` in favor of the `DirectionalLight`
component

## Testing

I ran some examples with lights.

---

## Migration Guide

`PointLightBundle`, `SpotLightBundle`, and `DirectionalLightBundle` have
been deprecated. Use the `PointLight`, `SpotLight`, and
`DirectionalLight` components instead. Adding them will now insert the
other components required by them automatically.
2024-10-01 03:20:43 +00:00
Clar Fon efda7f3f9c Simpler lint fixes: makes ci lints work but disables a lint for now (#15376)
Takes the first two commits from #15375 and adds suggestions from this
comment:
https://github.com/bevyengine/bevy/pull/15375#issuecomment-2366968300

See #15375 for more reasoning/motivation.

## Rebasing (rerunning)

```rust
git switch simpler-lint-fixes
git reset --hard main
cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate
cargo fmt --all
git add --update
git commit --message "rustfmt"
cargo clippy --workspace --all-targets --all-features --fix
cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate
cargo fmt --all
git add --update
git commit --message "clippy"
git cherry-pick e6c0b94f6795222310fb812fa5c4512661fc7887
```
2024-09-24 11:42:59 +00:00
Jan Hohenheim c92ee31779 Allow ordering variable timesteps around fixed timesteps (#14881)
# Objective

- Fixes #14873, see that issue for a whole lot of context

## Solution

- Add a blessed system set for this stuff. See [this Discord
discussion](https://discord.com/channels/691052431525675048/749335865876021248/1276262931327094908).

Note that the gizmo systems,
[LWIM](https://github.com/Leafwing-Studios/leafwing-input-manager/pull/522/files#diff-9b59ee4899ad0a5d008889ea89a124a7291316532e42f9f3d6ae842b906fb095R154)
and now a new plugin I'm working on are all already ordering against
`run_fixed_main_schedule`, so having a dedicated system set should be
more robust and hopefully also more discoverable.

---

## ~~Showcase~~

~~I can add a little video of a smooth camera later if this gets merged
:)~~
Apparently a release note is not needed, so I'll leave it out. See the
changes in the fixed timestep example for usage showcase and the video
in #14873 for a more or less accurate video of the effect (it does not
use the same solution though, so it is not quite the same)

## Migration Guide


[run_fixed_main_schedule](https://docs.rs/bevy/latest/bevy/time/fn.run_fixed_main_schedule.html)
is no longer public. If you used to order against it, use the new
dedicated `RunFixedMainLoopSystem` system set instead. You can replace
your usage of `run_fixed_main_schedule` one for one by
`RunFixedMainLoopSystem::FixedMainLoop`, but it is now more idiomatic to
place your systems in either
`RunFixedMainLoopSystem::BeforeFixedMainLoop` or
`RunFixedMainLoopSystem::AfterFixedMainLoop`

Old:
```rust
app.add_systems(
    RunFixedMainLoop,
    some_system.before(run_fixed_main_schedule)
);
```

New:
```rust
app.add_systems(
    RunFixedMainLoop,
    some_system.in_set(RunFixedMainLoopSystem::BeforeFixedMainLoop)
);
```

---------

Co-authored-by: Tau Gärtli <git@tau.garden>
2024-08-23 16:19:42 +00:00
Sunil Thunga 5ffdc0c93f Moves smooth_follow to movement dir (#14249)
# Objective

- Moves the smooth_follow.rs into movement directory in examples
- Fixes #14241

## Solution

- Move the smooth_follow.rs to movement dir in examples.
2024-07-09 18:22:47 +00:00
Jan Hohenheim d0e606b87c Add an example for doing movement in fixed timesteps (#14223)
_copy-pasted from my doc comment in the code_

# Objective

This example shows how to properly handle player input, advance a
physics simulation in a fixed timestep, and display the results.

The classic source for how and why this is done is Glenn Fiedler's
article [Fix Your
Timestep!](https://gafferongames.com/post/fix_your_timestep/).

## Motivation

The naive way of moving a player is to just update their position like
so:
```rust
transform.translation += velocity;
```
The issue here is that the player's movement speed will be tied to the
frame rate.
Faster machines will move the player faster, and slower machines will
move the player slower.
In fact, you can observe this today when running some old games that did
it this way on modern hardware!
The player will move at a breakneck pace.

The more sophisticated way is to update the player's position based on
the time that has passed:
```rust
transform.translation += velocity * time.delta_seconds();
```
This way, velocity represents a speed in units per second, and the
player will move at the same speed regardless of the frame rate.

However, this can still be problematic if the frame rate is very low or
very high. If the frame rate is very low, the player will move in large
jumps. This may lead to a player moving in such large jumps that they
pass through walls or other obstacles. In general, you cannot expect a
physics simulation to behave nicely with *any* delta time. Ideally, we
want to have some stability in what kinds of delta times we feed into
our physics simulation.

The solution is using a fixed timestep. This means that we advance the
physics simulation by a fixed amount at a time. If the real time that
passed between two frames is less than the fixed timestep, we simply
don't advance the physics simulation at all.
If it is more, we advance the physics simulation multiple times until we
catch up. You can read more about how Bevy implements this in the
documentation for
[`bevy::time::Fixed`](https://docs.rs/bevy/latest/bevy/time/struct.Fixed.html).

This leaves us with a last problem, however. If our physics simulation
may advance zero or multiple times per frame, there may be frames in
which the player's position did not need to be updated at all, and some
where it is updated by a large amount that resulted from running the
physics simulation multiple times. This is physically correct, but
visually jarring. Imagine a player moving in a straight line, but
depending on the frame rate, they may sometimes advance by a large
amount and sometimes not at all. Visually, we want the player to move
smoothly. This is why we need to separate the player's position in the
physics simulation from the player's position in the visual
representation. The visual representation can then be interpolated
smoothly based on the last and current actual player position in the
physics simulation.

This is a tradeoff: every visual frame is now slightly lagging behind
the actual physical frame, but in return, the player's movement will
appear smooth. There are other ways to compute the visual representation
of the player, such as extrapolation. See the [documentation of the
lightyear
crate](https://cbournhonesque.github.io/lightyear/book/concepts/advanced_replication/visual_interpolation.html)
for a nice overview of the different methods and their tradeoffs.

## Implementation

- The player's velocity is stored in a `Velocity` component. This is the
speed in units per second.
- The player's current position in the physics simulation is stored in a
`PhysicalTranslation` component.
- The player's previous position in the physics simulation is stored in
a `PreviousPhysicalTranslation` component.
- The player's visual representation is stored in Bevy's regular
`Transform` component.
- Every frame, we go through the following steps:
- Advance the physics simulation by one fixed timestep in the
`advance_physics` system.
This is run in the `FixedUpdate` schedule, which runs before the
`Update` schedule.
- Update the player's visual representation in the
`update_displayed_transform` system.
This interpolates between the player's previous and current position in
the physics simulation.
- Update the player's velocity based on the player's input in the
`handle_input` system.

## Relevant Issues

Related to #1259.
I'm also fairly sure I've seen an issue somewhere made by
@alice-i-cecile about showing how to move a character correctly in a
fixed timestep, but I cannot find it.
2024-07-09 14:23:10 +00:00