Commit graph

141 commits

Author SHA1 Message Date
François
e8b28547bf Cleanup dynamic scene before building (#6254)
# Objective

- Dynamic scene builder can build scenes without components, if they didn't have any matching the type registry
- Those entities are not really useful in the final `DynamicScene`

## Solution

- Add a method `remove_empty_entities` that will remove empty entities. It's not called by default when calling `build`, I'm not sure if that's a good idea or not.
2022-12-20 16:16:58 +00:00
James Liu
e8c0df9e1e Allow iterating over with EntityRef over the entire World (#6843)
# Objective
Partially addresses #5504. Allow users to get an `Iterator<Item = EntityRef<'a>>` over all entities in the `World`.

## Solution
Change `World::iter_entities` to return an iterator of `EntityRef` instead of `Entity`.

Not sure how to tackle making an `Iterator<Item = EntityMut<'_>>` without being horribly unsound. Might need to wait for `LendingIterator` to stabilize so we can ensure only one of them is valid at a given time.

---

## Changelog
Changed: `World::iter_entities` now returns an iterator of `EntityRef` instead of `Entity`.
2022-12-05 22:35:02 +00:00
Lixou
4209fcaeda Make spawn_dynamic return InstanceId (#6663)
# Objective

Fixes #6661 

## Solution

Make `SceneSpawner::spawn_dynamic` return `InstanceId` like other functions there.

---

## Changelog

Make `SceneSpawner::spawn_dynamic` return `InstanceId` instead of `()`.
2022-11-18 21:16:31 +00:00
Zhell
af2a199254 [Fixes #6030] Bevy scene optional serde (#6076)
# Objective

Fixes #6030, making ``serde`` optional.

## Solution

This was solved by making a ``serialize`` feature that can activate ``serde``, which is now optional. 

When ``serialize`` is deactivated, the ``Plugin`` implementation for ``ScenePlugin`` does nothing.


Co-authored-by: Linus Käll <linus.kall.business@gmail.com>
2022-11-14 23:08:22 +00:00
github-actions[bot]
920543c824 Release 0.9.0 (#6568)
Preparing next release
This PR has been auto-generated
2022-11-12 20:01:29 +00:00
Gino Valente
97f7a1a99c bevy_reflect: Binary formats (#6140)
# Objective

Closes #5934

Currently it is not possible to de/serialize data to non-self-describing formats using reflection.

## Solution

Add support for non-self-describing de/serialization using reflection.

This allows us to use binary formatters, like [`postcard`](https://crates.io/crates/postcard):

```rust
#[derive(Reflect, FromReflect, Debug, PartialEq)]
struct Foo {
  data: String
}

let mut registry = TypeRegistry::new();
registry.register::<Foo>();

let input = Foo {
  data: "Hello world!".to_string()
};

// === Serialize! === //
let serializer = ReflectSerializer::new(&input, &registry);
let bytes: Vec<u8> = postcard::to_allocvec(&serializer).unwrap();

println!("{:?}", bytes); // Output: [129, 217, 61, 98, ...]

// === Deserialize! === //
let deserializer = UntypedReflectDeserializer::new(&registry);

let dynamic_output = deserializer
  .deserialize(&mut postcard::Deserializer::from_bytes(&bytes))
  .unwrap();

let output = <Foo as FromReflect>::from_reflect(dynamic_output.as_ref()).unwrap();

assert_eq!(expected, output); // OK!
```

#### Crates Tested

- ~~[`rmp-serde`](https://crates.io/crates/rmp-serde)~~ Apparently, this _is_ self-describing
- ~~[`bincode` v2.0.0-rc.1](https://crates.io/crates/bincode/2.0.0-rc.1) (using [this PR](https://github.com/bincode-org/bincode/pull/586))~~ This actually works for the latest release (v1.3.3) of [`bincode`](https://crates.io/crates/bincode) as well. You just need to be sure to use fixed-int encoding.
- [`postcard`](https://crates.io/crates/postcard)

## Future Work

Ideally, we would refactor the `serde` module, but I don't think I'll do that in this PR so as to keep the diff relatively small (and to avoid any painful rebases). This should probably be done once this is merged, though.

Some areas we could improve with a refactor:

* Split deserialization logic across multiple files
* Consolidate helper functions/structs
* Make the logic more DRY

---

## Changelog

- Add support for non-self-describing de/serialization using reflection.


Co-authored-by: Gino Valente <49806985+MrGVSV@users.noreply.github.com>
2022-11-04 02:22:54 +00:00
Alice Cecile
334e09892b Revert "Show prelude re-exports in docs (#6448)" (#6449)
This reverts commit 53d387f340.

# Objective

Reverts #6448. This didn't have the intended effect: we're now getting bevy::prelude shown in the docs again.

Co-authored-by: Alejandro Pascual <alejandro.pascual.pozo@gmail.com>
2022-11-02 20:40:45 +00:00
Alejandro Pascual
53d387f340 Show prelude re-exports in docs (#6448)
# Objective

- Right now re-exports are completely hidden in prelude docs.
- Fixes #6433

## Solution

- We could show the re-exports without inlining their documentation.
2022-11-02 19:35:06 +00:00
Edvin Kjell
a8a62fcf3d [Fixes #6059] `Entity`'s “ID” should be named “index” instead (#6107)
# Objective

Fixes #6059, changing all incorrect occurrences of ``id`` in the ``entity`` module to ``index``:

* struct level documentation,
* ``id`` struct field,
* ``id`` method and its documentation.

## Solution

Renaming and verifying using CI. 


Co-authored-by: Edvin Kjell <43633999+Edwox@users.noreply.github.com>
2022-11-02 15:19:50 +00:00
Gino Valente
bb968f41bc bevy_scene: Serialize entities to map (#6416)
# Objective

Entities are unique, however, this is not reflected in the scene format. Currently, entities are stored in a list where a user could inadvertently create a duplicate of the same entity. 

## Solution

Switch from the list representation to a map representation for entities.

---

## Changelog

* The `entities` field in the scene format is now a map of entity ID to entity data

## Migration Guide

The scene format now stores its collection of entities in a map rather than a list:

```rust
// OLD
(
  entities: [
    (
      entity: 12,
      components: {
        "bevy_transform::components::transform::Transform": (
          translation: (
            x: 0.0,
            y: 0.0,
            z: 0.0
          ),
          rotation: (0.0, 0.0, 0.0, 1.0),
          scale: (
            x: 1.0,
            y: 1.0,
            z: 1.0
          ),
        ),
      },
    ),
  ],
)

// NEW
(
  entities: {
    12: (
      components: {
        "bevy_transform::components::transform::Transform": (
          translation: (
            x: 0.0,
            y: 0.0,
            z: 0.0
          ),
          rotation: (0.0, 0.0, 0.0, 1.0),
          scale: (
            x: 1.0,
            y: 1.0,
            z: 1.0
          ),
        ),
      },
    ),
  },
)
```
2022-10-31 16:35:18 +00:00
Jakob Hellermann
e71c4d2802 fix nightly clippy warnings (#6395)
# Objective

- fix new clippy lints before they get stable and break CI

## Solution

- run `clippy --fix` to auto-fix machine-applicable lints
- silence `clippy::should_implement_trait` for `fn HandleId::default<T: Asset>`

## Changes
- always prefer `format!("{inline}")` over `format!("{}", not_inline)`
- prefer `Box::default` (or `Box::<T>::default` if necessary) over `Box::new(T::default())`
2022-10-28 21:03:01 +00:00
James Liu
fe7ebd4326 Clean up Fetch code (#4800)
# Objective
Clean up code surrounding fetch by pulling out the common parts into the iteration code.

## Solution
Merge `Fetch::table_fetch` and `Fetch::archetype_fetch` into a single API: `Fetch::fetch(&mut self, entity: &Entity, table_row: &usize)`. This provides everything any fetch requires to internally decide which storage to read from and get the underlying data. All of these functions are marked as `#[inline(always)]` and the arguments are passed as references to attempt to optimize out the argument that isn't being used.

External to `Fetch`, Query iteration has been changed to keep track of the table row and entity outside of fetch, which moves a lot of the expensive bookkeeping `Fetch` structs had previously done internally into the outer loop.

~~TODO: Benchmark, docs~~ Done.

---

## Changelog
Changed: `Fetch::table_fetch` and `Fetch::archetype_fetch` have been merged into a single `Fetch::fetch` function.

## Migration Guide
TODO

Co-authored-by: Brian Merchant <bhmerchang@gmail.com>
Co-authored-by: Saverio Miroddi <saverio.pub2@gmail.com>
2022-10-28 09:25:50 +00:00
Gino Valente
284b1f1302 bevy_scene: Stabilize entity order in DynamicSceneBuilder (#6382)
# Objective

Currently, `DynamicSceneBuilder` keeps track of entities via a `HashMap`. This has an unintended side-effect in that, when building the full `DynamicScene`, we aren't guaranteed any particular order. 

In other words, inserting Entity A then Entity B can result in either `[A, B]` or `[B, A]`. This can be rather annoying when running tests on scenes generated via the builder as it will work sometimes but not other times. There's also the potential that this might unnecessarily clutter up VCS diffs for scene files (assuming they had an intentional order).

## Solution

Store `DynamicSceneBuilder`'s entities in a `Vec` rather than a `HashMap`.

---

## Changelog

* Stablized entity order in `DynamicSceneBuilder` (0.9.0-dev)
2022-10-27 23:38:03 +00:00
Gino Valente
894334b51e bevy_scene: Use map for scene components (#6345)
# Objective

Currently scenes define components using a list:

```rust
[
  (
    entity: 0,
    components: [
      {
        "bevy_transform::components::transform::Transform": (
          translation: (
            x: 0.0,
            y: 0.0,
            z: 0.0
          ),
          rotation: (0.0, 0.0, 0.0, 1.0),
          scale: (
            x: 1.0,
            y: 1.0,
            z: 1.0
          ),
        ),
      },
      {
        "my_crate::Foo": (
          text: "Hello World",
        ),
      },
      {
        "my_crate::Bar": (
          baz: 123,
        ),
      },
    ],
  ),
]
```

However, this representation has some drawbacks (as pointed out by @Metadorius in [this](https://github.com/bevyengine/bevy/pull/4561#issuecomment-1202215565) comment):

1. Increased nesting and more characters (minor effect on overall size)
2. More importantly, by definition, entities cannot have more than one instance of any given component. Therefore, such data is best stored as a map— where all values are meant to have unique keys.


## Solution

Change `components` to store a map of components rather than a list:

```rust
[
  (
    entity: 0,
    components: {
      "bevy_transform::components::transform::Transform": (
        translation: (
          x: 0.0,
          y: 0.0,
          z: 0.0
        ),
        rotation: (0.0, 0.0, 0.0, 1.0),
        scale: (
          x: 1.0,
          y: 1.0,
          z: 1.0
        ),
      ),
      "my_crate::Foo": (
        text: "Hello World",
      ),
      "my_crate::Bar": (
        baz: 123
      ),
    },
  ),
]
```

#### Code Representation

This change only affects the scene format itself. `DynamicEntity` still stores its components as a list. The reason for this is that storing such data as a map is not really needed since:
1. The "key" of each value is easily found by just calling `Reflect::type_name` on it
2. We should be generating such structs using the `World` itself which upholds the one-component-per-entity rule

One could in theory create manually create a `DynamicEntity` with duplicate components, but this isn't something I think we should focus on in this PR. `DynamicEntity` can be broken in other ways (i.e. storing a non-component in the components list), and resolving its issues can be done in a separate PR.

---

## Changelog

* The scene format now uses a map to represent the collection of components rather than a list

## Migration Guide

The scene format now uses a map to represent the collection of components. Scene files will need to update from the old list format.

<details>
<summary>Example Code</summary>

```rust
// OLD
[
  (
    entity: 0,
    components: [
      {
        "bevy_transform::components::transform::Transform": (
          translation: (
            x: 0.0,
            y: 0.0,
            z: 0.0
          ),
          rotation: (0.0, 0.0, 0.0, 1.0),
          scale: (
            x: 1.0,
            y: 1.0,
            z: 1.0
          ),
        ),
      },
      {
        "my_crate::Foo": (
          text: "Hello World",
        ),
      },
      {
        "my_crate::Bar": (
          baz: 123,
        ),
      },
    ],
  ),
]

// NEW
[
  (
    entity: 0,
    components: {
      "bevy_transform::components::transform::Transform": (
        translation: (
          x: 0.0,
          y: 0.0,
          z: 0.0
        ),
        rotation: (0.0, 0.0, 0.0, 1.0),
        scale: (
          x: 1.0,
          y: 1.0,
          z: 1.0
        ),
      ),
      "my_crate::Foo": (
        text: "Hello World",
      ),
      "my_crate::Bar": (
        baz: 123
      ),
    },
  ),
]
```

</details>
2022-10-27 01:46:33 +00:00
targrub
c18b1a839b Prepare for upcoming rustlang by fixing upcoming clippy warnings (#6376)
# Objective

- Proactive changing of code to comply with warnings generated by beta of rustlang version of cargo clippy.

## Solution

- Code changed as recommended by `rustup update`, `rustup default beta`, `cargo run -p ci -- clippy`.
- Tested using `beta` and `stable`.  No clippy warnings in either after changes made.

---

## Changelog

- Warnings fixed were: `clippy::explicit-auto-deref` (present in 11 files), `clippy::needless-borrow` (present in 2 files), and `clippy::only-used-in-recursion` (only 1 file).
2022-10-26 19:15:15 +00:00
Gino Valente
beab0bdc63 bevy_scene: Replace root list with struct (#6354)
# Objective

Scenes are currently represented as a list of entities. This is all we need currently, but we may want to add more data to this format in the future (metadata, asset lists, etc.). 

It would be nice to update the format in preparation of possible future changes. Doing so now (i.e., before 0.9) could mean reduced[^1] breakage for things added in 0.10.

[^1]: Obviously, adding features runs the risk of breaking things regardless. But if all features added are for whatever reason optional or well-contained, then users should at least have an easier time updating.

## Solution

Made the scene root a struct rather than a list.

```rust
(
  entities: [
    // Entity data here...
  ]
)
```

---

## Changelog

* The scene format now puts the entity list in a newly added `entities` field, rather than having it be the root object

## Migration Guide

The scene file format now uses a struct as the root object rather than a list of entities. The list of entities is now found in the `entities` field of this struct.

```rust
// OLD
[
  (
    entity: 0,
    components: [
      // Components...
    ]
  ),
]

// NEW
(
  entities: [
    (
      entity: 0,
      components: [
        // Components...
      ]
    ),
  ]
)
```


Co-authored-by: Gino Valente <49806985+MrGVSV@users.noreply.github.com>
2022-10-24 21:01:11 +00:00
François
b09b2c1056 Create a scene from a dynamic scene (#6229)
# Objective

- Add a method to create a `Scene` from a `DynamicScene`
2022-10-17 16:25:12 +00:00
mike
a0f1468108 Add iter_entities to World #6228 (#6242)
# 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.
2022-10-17 13:47:00 +00:00
François
ccf7c65a78 dynamic scene builder (#6227)
# 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
2022-10-12 01:48:16 +00:00
François
b4accebe10 scenes: simplify return type of iter_instance_entities (#5994)
# Objective

- Taking the API improvement out of #5431 
- `iter_instance_entities` used to return an option of iterator, now it just returns an iterator

---

## Changelog

- If you use `SceneSpawner::iter_instance_entities`, it no longer returns an `Option`. The iterator will be empty if the return value used to be `None`
2022-10-10 23:09:08 +00:00
Carter Anderson
dc3f801239 Exclusive Systems Now Implement System. Flexible Exclusive System Params (#6083)
# Objective

The [Stageless RFC](https://github.com/bevyengine/rfcs/pull/45) involves allowing exclusive systems to be referenced and ordered relative to parallel systems. We've agreed that unifying systems under `System` is the right move.

This is an alternative to #4166 (see rationale in the comments I left there). Note that this builds on the learnings established there (and borrows some patterns).

## Solution

This unifies parallel and exclusive systems under the shared `System` trait, removing the old `ExclusiveSystem` trait / impls. This is accomplished by adding a new `ExclusiveFunctionSystem` impl similar to `FunctionSystem`. It is backed by `ExclusiveSystemParam`, which is similar to `SystemParam`. There is a new flattened out SystemContainer api (which cuts out a lot of trait and type complexity). 

This means you can remove all cases of `exclusive_system()`:

```rust
// before
commands.add_system(some_system.exclusive_system());
// after
commands.add_system(some_system);
```

I've also implemented `ExclusiveSystemParam` for `&mut QueryState` and `&mut SystemState`, which makes this possible in exclusive systems:

```rust
fn some_exclusive_system(
    world: &mut World,
    transforms: &mut QueryState<&Transform>,
    state: &mut SystemState<(Res<Time>, Query<&Player>)>,
) {
    for transform in transforms.iter(world) {
        println!("{transform:?}");
    }
    let (time, players) = state.get(world);
    for player in players.iter() {
        println!("{player:?}");
    }
}
```

Note that "exclusive function systems" assume `&mut World` is present (and the first param). I think this is a fair assumption, given that the presence of `&mut World` is what defines the need for an exclusive system.

I added some targeted SystemParam `static` constraints, which removed the need for this:
``` rust
fn some_exclusive_system(state: &mut SystemState<(Res<'static, Time>, Query<&'static Player>)>) {}
```

## Related

- #2923
- #3001
- #3946

## Changelog

- `ExclusiveSystem` trait (and implementations) has been removed in favor of sharing the `System` trait.
- `ExclusiveFunctionSystem` and `ExclusiveSystemParam` were added, enabling flexible exclusive function systems
- `&mut SystemState` and `&mut QueryState` now implement `ExclusiveSystemParam`
- Exclusive and parallel System configuration is now done via a unified `SystemDescriptor`, `IntoSystemDescriptor`, and `SystemContainer` api.

## Migration Guide

Calling `.exclusive_system()` is no longer required (or supported) for converting exclusive system functions to exclusive systems:

```rust
// Old (0.8)
app.add_system(some_exclusive_system.exclusive_system());
// New (0.9)
app.add_system(some_exclusive_system);
```

Converting "normal" parallel systems to exclusive systems is done by calling the exclusive ordering apis:

```rust
// Old (0.8)
app.add_system(some_system.exclusive_system().at_end());
// New (0.9)
app.add_system(some_system.at_end());
```

Query state in exclusive systems can now be cached via ExclusiveSystemParams, which should be preferred for clarity and performance reasons:
```rust
// Old (0.8)
fn some_system(world: &mut World) {
  let mut transforms = world.query::<&Transform>();
  for transform in transforms.iter(world) {
  }
}
// New (0.9)
fn some_system(world: &mut World, transforms: &mut QueryState<&Transform>) {
  for transform in transforms.iter(world) {
  }
}
```
2022-09-26 23:57:07 +00:00
Carter Anderson
01aedc8431 Spawn now takes a Bundle (#6054)
# Objective

Now that we can consolidate Bundles and Components under a single insert (thanks to #2975 and #6039), almost 100% of world spawns now look like `world.spawn().insert((Some, Tuple, Here))`. Spawning an entity without any components is an extremely uncommon pattern, so it makes sense to give spawn the "first class" ergonomic api. This consolidated api should be made consistent across all spawn apis (such as World and Commands).

## Solution

All `spawn` apis (`World::spawn`, `Commands:;spawn`, `ChildBuilder::spawn`, and `WorldChildBuilder::spawn`) now accept a bundle as input:

```rust
// before:
commands
  .spawn()
  .insert((A, B, C));
world
  .spawn()
  .insert((A, B, C);

// after
commands.spawn((A, B, C));
world.spawn((A, B, C));
```

All existing instances of `spawn_bundle` have been deprecated in favor of the new `spawn` api. A new `spawn_empty` has been added, replacing the old `spawn` api.  

By allowing `world.spawn(some_bundle)` to replace `world.spawn().insert(some_bundle)`, this opened the door to removing the initial entity allocation in the "empty" archetype / table done in `spawn()` (and subsequent move to the actual archetype in `.insert(some_bundle)`).

This improves spawn performance by over 10%:
![image](https://user-images.githubusercontent.com/2694663/191627587-4ab2f949-4ccd-4231-80eb-80dd4d9ad6b9.png)

To take this measurement, I added a new `world_spawn` benchmark.

Unfortunately, optimizing `Commands::spawn` is slightly less trivial, as Commands expose the Entity id of spawned entities prior to actually spawning. Doing the optimization would (naively) require assurances that the `spawn(some_bundle)` command is applied before all other commands involving the entity (which would not necessarily be true, if memory serves). Optimizing `Commands::spawn` this way does feel possible, but it will require careful thought (and maybe some additional checks), which deserves its own PR. For now, it has the same performance characteristics of the current `Commands::spawn_bundle` on main.

**Note that 99% of this PR is simple renames and refactors. The only code that needs careful scrutiny is the new `World::spawn()` impl, which is relatively straightforward, but it has some new unsafe code (which re-uses battle tested BundlerSpawner code path).** 

---

## Changelog

- All `spawn` apis (`World::spawn`, `Commands:;spawn`, `ChildBuilder::spawn`, and `WorldChildBuilder::spawn`) now accept a bundle as input
- All instances of `spawn_bundle` have been deprecated in favor of the new `spawn` api
- World and Commands now have `spawn_empty()`, which is equivalent to the old `spawn()` behavior.  

## Migration Guide

```rust
// Old (0.8):
commands
  .spawn()
  .insert_bundle((A, B, C));
// New (0.9)
commands.spawn((A, B, C));

// Old (0.8):
commands.spawn_bundle((A, B, C));
// New (0.9)
commands.spawn((A, B, C));

// Old (0.8):
let entity = commands.spawn().id();
// New (0.9)
let entity = commands.spawn_empty().id();

// Old (0.8)
let entity = world.spawn().id();
// New (0.9)
let entity = world.spawn_empty();
```
2022-09-23 19:55:54 +00:00
Gino Valente
d30d3e752a bevy_reflect: Improve serialization format even more (#5723)
> Note: This is rebased off #4561 and can be viewed as a competitor to that PR. See `Comparison with #4561` section for details.

# Objective

The current serialization format used by `bevy_reflect` is both verbose and error-prone. Taking the following structs[^1] for example:

```rust
// -- src/inventory.rs

#[derive(Reflect)]
struct Inventory {
  id: String,
  max_storage: usize,
  items: Vec<Item>
}

#[derive(Reflect)]
struct Item {
  name: String
}
```

Given an inventory of a single item, this would serialize to something like:

```rust
// -- assets/inventory.ron

{
  "type": "my_game::inventory::Inventory",
  "struct": {
    "id": {
      "type": "alloc::string::String",
      "value": "inv001",
    },
    "max_storage": {
      "type": "usize",
      "value": 10
    },
    "items": {
      "type": "alloc::vec::Vec<alloc::string::String>",
      "list": [
        {
          "type": "my_game::inventory::Item",
          "struct": {
            "name": {
              "type": "alloc::string::String",
              "value": "Pickaxe"
            },
          },
        },
      ],
    },
  },
}
```

Aside from being really long and difficult to read, it also has a few "gotchas" that users need to be aware of if they want to edit the file manually. A major one is the requirement that you use the proper keys for a given type. For structs, you need `"struct"`. For lists, `"list"`. For tuple structs, `"tuple_struct"`. And so on.

It also ***requires*** that the `"type"` entry come before the actual data. Despite being a map— which in programming is almost always orderless by default— the entries need to be in a particular order. Failure to follow the ordering convention results in a failure to deserialize the data.

This makes it very prone to errors and annoyances.


## Solution

Using #4042, we can remove a lot of the boilerplate and metadata needed by this older system. Since we now have static access to type information, we can simplify our serialized data to look like:

```rust
// -- assets/inventory.ron

{
  "my_game::inventory::Inventory": (
    id: "inv001",
    max_storage: 10,
    items: [
      (
        name: "Pickaxe"
      ),
    ],
  ),
}
```

This is much more digestible and a lot less error-prone (no more key requirements and no more extra type names).

Additionally, it is a lot more familiar to users as it follows conventional serde mechanics. For example, the struct is represented with `(...)` when serialized to RON.

#### Custom Serialization

Additionally, this PR adds the opt-in ability to specify a custom serde implementation to be used rather than the one created via reflection. For example[^1]:

```rust
// -- src/inventory.rs

#[derive(Reflect, Serialize)]
#[reflect(Serialize)]
struct Item {
  #[serde(alias = "id")]
  name: String
}
```

```rust
// -- assets/inventory.ron

{
  "my_game::inventory::Inventory": (
    id: "inv001",
    max_storage: 10,
    items: [
      (
        id: "Pickaxe"
      ),
    ],
  ),
},
```

By allowing users to define their own serialization methods, we do two things:

1. We give more control over how data is serialized/deserialized to the end user
2. We avoid having to re-define serde's attributes and forcing users to apply both (e.g. we don't need a `#[reflect(alias)]` attribute).

### Improved Formats

One of the improvements this PR provides is the ability to represent data in ways that are more conventional and/or familiar to users. Many users are familiar with RON so here are some of the ways we can now represent data in RON:

###### Structs

```js
{
  "my_crate::Foo": (
    bar: 123
  )
}
// OR
{
  "my_crate::Foo": Foo(
    bar: 123
  )
}
```

<details>
<summary>Old Format</summary>

```js
{
  "type": "my_crate::Foo",
  "struct": {
    "bar": {
      "type": "usize",
      "value": 123
    }
  }
}
```

</details>

###### Tuples

```js
{
  "(f32, f32)": (1.0, 2.0)
}
```

<details>
<summary>Old Format</summary>

```js
{
  "type": "(f32, f32)",
  "tuple": [
    {
      "type": "f32",
      "value": 1.0
    },
    {
      "type": "f32",
      "value": 2.0
    }
  ]
}
```

</details>

###### Tuple Structs

```js
{
  "my_crate::Bar": ("Hello World!")
}
// OR
{
  "my_crate::Bar": Bar("Hello World!")
}
```

<details>
<summary>Old Format</summary>

```js
{
  "type": "my_crate::Bar",
  "tuple_struct": [
    {
      "type": "alloc::string::String",
      "value": "Hello World!"
    }
  ]
}
```

</details>

###### Arrays

It may be a bit surprising to some, but arrays now also use the tuple format. This is because they essentially _are_ tuples (a sequence of values with a fixed size), but only allow for homogenous types. Additionally, this is how RON handles them and is probably a result of the 32-capacity limit imposed on them (both by [serde](https://docs.rs/serde/latest/serde/trait.Serialize.html#impl-Serialize-for-%5BT%3B%2032%5D) and by [bevy_reflect](https://docs.rs/bevy/latest/bevy/reflect/trait.GetTypeRegistration.html#impl-GetTypeRegistration-for-%5BT%3B%2032%5D)).

```js
{
  "[i32; 3]": (1, 2, 3)
}
```

<details>
<summary>Old Format</summary>

```js
{
  "type": "[i32; 3]",
  "array": [
    {
      "type": "i32",
      "value": 1
    },
    {
      "type": "i32",
      "value": 2
    },
    {
      "type": "i32",
      "value": 3
    }
  ]
}
```

</details>

###### Enums

To make things simple, I'll just put a struct variant here, but the style applies to all variant types:

```js
{
  "my_crate::ItemType": Consumable(
    name: "Healing potion"
  )
}
```

<details>
<summary>Old Format</summary>

```js
{
  "type": "my_crate::ItemType",
  "enum": {
    "variant": "Consumable",
    "struct": {
      "name": {
        "type": "alloc::string::String",
        "value": "Healing potion"
      }
    }
  }
}
```

</details>

### Comparison with #4561

This PR is a rebased version of #4561. The reason for the split between the two is because this PR creates a _very_ different scene format. You may notice that the PR descriptions for either PR are pretty similar. This was done to better convey the changes depending on which (if any) gets merged first. If #4561 makes it in first, I will update this PR description accordingly.

---

## Changelog

* Re-worked serialization/deserialization for reflected types
* Added `TypedReflectDeserializer` for deserializing data with known `TypeInfo`
* Renamed `ReflectDeserializer` to `UntypedReflectDeserializer` 
* ~~Replaced usages of `deserialize_any` with `deserialize_map` for non-self-describing formats~~ Reverted this change since there are still some issues that need to be sorted out (in a separate PR). By reverting this, crates like `bincode` can throw an error when attempting to deserialize non-self-describing formats (`bincode` results in `DeserializeAnyNotSupported`)
* Structs, tuples, tuple structs, arrays, and enums are now all de/serialized using conventional serde methods

## Migration Guide

* This PR reduces the verbosity of the scene format. Scenes will need to be updated accordingly:

```js
// Old format
{
  "type": "my_game::item::Item",
  "struct": {
    "id": {
      "type": "alloc::string::String",
      "value": "bevycraft:stone",
    },
    "tags": {
      "type": "alloc::vec::Vec<alloc::string::String>",
      "list": [
        {
          "type": "alloc::string::String",
          "value": "material"
        },
      ],
    },
}

// New format
{
  "my_game::item::Item": (
    id: "bevycraft:stone",
    tags: ["material"]
  )
}
```

[^1]: Some derives omitted for brevity.
2022-09-20 19:38:18 +00:00
Ixentus
662c6e9a34 Update to ron 0.8 (#5864)
# Objective

- Update ron to 0.8.0
- Fix breaking changes
- Closes #5862

## Solution

- Removed now non-existing method call (behavior is now the same without it)
2022-09-02 14:20:49 +00:00
François
e8041150ee can clone a scene (#5855)
# Objective

- Easier to work with model assets
- Models are often one mesh, many textures. This can be hard to use in Bevy as it's not possible to clone the scene to have one scene for each material. It's still possible to instantiate the texture-less scene, then modify the texture material once spawned but that means happening during play and is quite more painful

## Solution

- Expose the code to clone a scene. This code already existed but was only possible to use to spawn the scene
2022-09-02 11:56:21 +00:00
ira
992681b59b Make Resource trait opt-in, requiring #[derive(Resource)] V2 (#5577)
*This PR description is an edited copy of #5007, written by @alice-i-cecile.*
# Objective
Follow-up to https://github.com/bevyengine/bevy/pull/2254. The `Resource` trait currently has a blanket implementation for all types that meet its bounds.

While ergonomic, this results in several drawbacks:

* it is possible to make confusing, silent mistakes such as inserting a function pointer (Foo) rather than a value (Foo::Bar) as a resource
* it is challenging to discover if a type is intended to be used as a resource
* we cannot later add customization options (see the [RFC](https://github.com/bevyengine/rfcs/blob/main/rfcs/27-derive-component.md) for the equivalent choice for Component).
* dependencies can use the same Rust type as a resource in invisibly conflicting ways
* raw Rust types used as resources cannot preserve privacy appropriately, as anyone able to access that type can read and write to internal values
* we cannot capture a definitive list of possible resources to display to users in an editor
## Notes to reviewers
 * Review this commit-by-commit; there's effectively no back-tracking and there's a lot of churn in some of these commits.
   *ira: My commits are not as well organized :')*
 * I've relaxed the bound on Local to Send + Sync + 'static: I don't think these concerns apply there, so this can keep things simple. Storing e.g. a u32 in a Local is fine, because there's a variable name attached explaining what it does.
 * I think this is a bad place for the Resource trait to live, but I've left it in place to make reviewing easier. IMO that's best tackled with https://github.com/bevyengine/bevy/issues/4981.

## Changelog
`Resource` is no longer automatically implemented for all matching types. Instead, use the new `#[derive(Resource)]` macro.

## Migration Guide
Add `#[derive(Resource)]` to all types you are using as a resource.

If you are using a third party type as a resource, wrap it in a tuple struct to bypass orphan rules. Consider deriving `Deref` and `DerefMut` to improve ergonomics.

`ClearColor` no longer implements `Component`. Using `ClearColor` as a component in 0.8 did nothing.
Use the `ClearColorConfig` in the `Camera3d` and `Camera2d` components instead.


Co-authored-by: Alice <alice.i.cecile@gmail.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: devil-ira <justthecooldude@gmail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-08-08 21:36:35 +00:00
github-actions[bot]
444150025d Bump Version after Release (#5576)
Bump version after release
This PR has been auto-generated
2022-08-05 02:03:05 +00:00
github-actions[bot]
856588ed7c Release 0.8.0 (#5490)
Preparing next release
This PR has been auto-generated
2022-07-30 14:07:30 +00:00
Rob Parrett
a63d761aa3 Add VisibilityBundle and use it to fix gltfs, scenes, and examples (#5335)
# Objective

Gltfs, and a few examples were broken by #5310. Fix em.

Closes #5334

## Solution

Add `VisibilityBundle` as described here: https://github.com/bevyengine/bevy/issues/5334#issuecomment-1186050778 and sprinkle it around where needed.
2022-07-16 02:47:23 +00:00
ira
4847f7e3ad Update codebase to use IntoIterator where possible. (#5269)
Remove unnecessary calls to `iter()`/`iter_mut()`.
Mainly updates the use of queries in our code, docs, and examples.

```rust
// From
for _ in list.iter() {
for _ in list.iter_mut() {

// To
for _ in &list {
for _ in &mut list {
```

We already enable the pedantic lint [clippy::explicit_iter_loop](https://rust-lang.github.io/rust-clippy/stable/) inside of Bevy. However, this only warns for a few known types from the standard library.

## Note for reviewers
As you can see the additions and deletions are exactly equal.
Maybe give it a quick skim to check I didn't sneak in a crypto miner, but you don't have to torture yourself by reading every line.
I already experienced enough pain making this PR :) 


Co-authored-by: devil-ira <justthecooldude@gmail.com>
2022-07-11 15:28:50 +00:00
Hennadii Chernyshchyk
1da6720132 Add apply_or_insert functions to reflected component and resources (#5201)
# Objective

`ReflectResource` and `ReflectComponent` will panic on `apply` method if there is no such component. It's not very ergonomic. And not very good for performance since I need to check if such component exists first.

## Solution

* Add `ReflectComponent::apply_or_insert` and `ReflectResource::apply_or_insert` functions.
* Rename `ReflectComponent::add` into `ReflectComponent::insert` for consistency.

---

## Changelog

### Added

* `ReflectResource::apply_or_insert` and `ReflectComponent::apply_on_insert`.

### Changed

* Rename `ReflectComponent::add` into `ReflectComponent::insert` for consistency.
* Use `ReflectComponent::apply_on_insert` in `DynamicScene` instead of manual checking.

## Migration Guide

* Rename `ReflectComponent::add` into `ReflectComponent::insert`.
2022-07-11 14:11:24 +00:00
Oliver Pauffley
bf1ca81779 remove component and resource suffixes from reflect structs (#5219)
# Objective

Remove suffixes from reflect component and resource methods to closer match bevy norms.

## Solution

removed suffixes and also fixed a spelling error

---
2022-07-06 02:59:51 +00:00
François
ab72c8368f Fix ron deprecation (#5021)
# Objective

- Update to fix `ron` deprecation
2022-06-15 19:18:53 +00:00
François
c6958b3056 add a SceneBundle to spawn a scene (#2424)
# Objective

- Spawning a scene is handled as a special case with a command `spawn_scene` that takes an handle but doesn't let you specify anything else. This is the only handle that works that way.
- Workaround for this have been to add the `spawn_scene` on `ChildBuilder` to be able to specify transform of parent, or to make the `SceneSpawner` available to be able to select entities from a scene by their instance id

## Solution

Add a bundle
```rust
pub struct SceneBundle {
    pub scene: Handle<Scene>,
    pub transform: Transform,
    pub global_transform: GlobalTransform,
    pub instance_id: Option<InstanceId>,
}
```

and instead of 
```rust
commands.spawn_scene(asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Scene0"));
```
you can do
```rust
commands.spawn_bundle(SceneBundle {
    scene: asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Scene0"),
    ..Default::default()
});
```

The scene will be spawned as a child of the entity with the `SceneBundle`

~I would like to remove the command `spawn_scene` in favor of this bundle but didn't do it yet to get feedback first~

Co-authored-by: François <8672791+mockersf@users.noreply.github.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-06-09 20:34:09 +00:00
James Liu
c46691c04a Update gilrs to v0.9 (#4848)
# Objective
Fixes #4353. Fixes #4431. Picks up fixes for a panic for `gilrs` when `getGamepads()` is not available. 

## Solution
Update the `gilrs` to `v0.9.0`. Changelog can be seen here: dba36f9186

EDIT: Updated `uuid` to 1.1 to avoid duplicate dependencies. Added `nix`'s two dependencies as exceptions until `rodio` updates their deps.
2022-05-30 17:26:23 +00:00
Yutao Yuan
8d67832dfa Bump Bevy to 0.8.0-dev (#4505)
# Objective

We should bump our version to 0.8.0-dev after releasing 0.7.0, according to our release checklist.

## Solution

Do it.
2022-04-17 23:04:52 +00:00
Carter Anderson
83c6ffb73c release 0.7.0 (#4487) 2022-04-15 18:05:37 +00:00
Alice Cecile
7ce3ae43e3 Bump Bevy to 0.7.0-dev (#4230)
# Objective

- The [dev docs](https://dev-docs.bevyengine.org/bevy/index.html#) show version 0.6.0, which is actively misleading.

[Image of the problem](https://cdn.discordapp.com/attachments/695741366520512563/953513612943704114/Screenshot_20220316-154100_Firefox-01.jpeg)

Noticed by @ickk, fix proposed by @mockersf.

## Solution

- Bump the version across all Bevy crates to 0.7.0 dev.
- Set a reminder in the Release Checklist to remember to do this each release.
2022-03-19 03:54:15 +00:00
Alice Cecile
a304fd9a99 Split bevy_hierarchy out from bevy_transform (#4168)
# Objective

- Hierarchy tools are not just used for `Transform`: they are also used for scenes.
- In the future there's interest in using them for other features, such as visiibility inheritance.
- The fact that these tools are found in `bevy_transform` causes a great deal of user and developer confusion
- Fixes #2758.

## Solution

- Split `bevy_transform` into two!
- Make everything work again.

Note that this is a very tightly scoped PR: I *know* there are code quality and docs issues that existed in bevy_transform that I've just moved around. We should fix those in a seperate PR and try to merge this ASAP to reduce the bitrot involved in splitting an entire crate.

## Frustrations

The API around `GlobalTransform` is a mess: we have massive code and docs duplication, no link between the two types and no clear way to extend this to other forms of inheritance.

In the medium-term, I feel pretty strongly that `GlobalTransform` should be replaced by something like `Inherited<Transform>`, which lives in `bevy_hierarchy`:

- avoids code duplication
- makes the inheritance pattern extensible
- links the types at the type-level
- allows us to remove all references to inheritance from `bevy_transform`, making it more useful as a standalone crate and cleaning up its docs

## Additional context

- double-blessed by @cart in https://github.com/bevyengine/bevy/issues/4141#issuecomment-1063592414 and https://github.com/bevyengine/bevy/issues/2758#issuecomment-913810963
- preparation for more advanced / cleaner hierarchy tools: go read https://github.com/bevyengine/rfcs/pull/53 !
- originally attempted by @finegeometer in #2789. It was a great idea, just needed more discussion!

Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-03-15 01:54:05 +00:00
pubrrr
caf6611c62 remove Events from bevy_app, they now live in bevy_ecs (#4066)
# Objective

Fixes #4064.

## Solution

- remove Events from bevy_app
2022-03-01 19:33:56 +00:00
Alice Cecile
557ab9897a Make get_resource (and friends) infallible (#4047)
# Objective

- In the large majority of cases, users were calling `.unwrap()` immediately after `.get_resource`.
- Attempting to add more helpful error messages here resulted in endless manual boilerplate (see #3899 and the linked PRs).

## Solution

- Add an infallible variant named `.resource` and so on.
- Use these infallible variants over `.get_resource().unwrap()` across the code base.

## Notes

I did not provide equivalent methods on `WorldCell`, in favor of removing it entirely in #3939.

## Migration Guide

Infallible variants of `.get_resource` have been added that implicitly panic, rather than needing to be unwrapped.

Replace `world.get_resource::<Foo>().unwrap()` with `world.resource::<Foo>()`.

## Impact

- `.unwrap` search results before: 1084
- `.unwrap` search results after: 942
- internal `unwrap_or_else` calls added: 4
- trivial unwrap calls removed from tests and code: 146
- uses of the new `try_get_resource` API: 11
- percentage of the time the unwrapping API was used internally: 93%
2022-02-27 22:37:18 +00:00
danieleades
d8974e7c3d small and mostly pointless refactoring (#2934)
What is says on the tin.

This has got more to do with making `clippy` slightly more *quiet* than it does with changing anything that might greatly impact readability or performance.

that said, deriving `Default` for a couple of structs is a nice easy win
2022-02-13 22:33:55 +00:00
TheRawMeatball
ce752d2522 Increment last event count on next instead of iter (#2382)
# Objective

Currently, simply calling `iter` on an event reader will mark all of it's events as read, even if the returned iterator is never used

## Solution

With this, the cursor will simply move to the last unread, but available event when iter is called, and incremented by one per `next` call.


Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-02-02 02:29:33 +00:00
Carter Anderson
2ee38cb9e0 Release 0.6.0 (#3587) 2022-01-08 10:18:22 +00:00
David Sugar
8a8293b266 Renamed Entity::new to Entity::from_raw (#3465)
# Objective

- Rename `Entity::new(id: u32)` to `Entity::from_raw(id: u32)`.
- Add further documentation.
- fixes #3108

## Solution

- Renamed `Entity::new(id: u32)` to `Entity::from_raw(id: u32)`.
- Docs extended.

I derived the examples from the discussion of issue #3108 .

The [first case](https://github.com/bevyengine/bevy/issues/3108#issuecomment-966669781) mentioned in the linked issue is quite obvious but the [second one](https://github.com/bevyengine/bevy/issues/3108#issuecomment-967093902) probably needs further explanation.


Co-authored-by: r4gus <david@thesugar.de>
2021-12-29 20:49:00 +00:00
David Sugar
3a9d5a63c9 bevy::scene::Entity renamed to bevy::scene::DynamicEntity. (#3448)
Basic documentation added to bevy::scene::DynamicEntity and bevy::scene::DynamicScene.

# Objective

- Rename bevy::scene::Entity to bevy::scene::DynamicEntity
- fixes #3233

## Solution

- Renamed the struct as requested.
- Added basic documentation.

Co-authored-by: r4gus <david@thesugar.de>
2021-12-27 21:24:18 +00:00
François
5d5d7833f0 fix parenting of scenes (#2410)
# Objective

Fix #2406 

Scene parenting was not done completely, leaving the hierarchy maintenance to the standard system. As scene spawning happens in stage `PreUpdate` and hierarchy maintenance in stage `PostUpdate`, this left the scene in an invalid state parent wise for part of a frame

## Solution

Also add/update the `Children` component when spawning the scene.

I kept the `Children` component as a `SmallVec`, it could be moved to an `HashSet` to guarantee uniqueness


Co-authored-by: François <8672791+mockersf@users.noreply.github.com>
2021-12-24 06:57:28 +00:00
François
92a7e16aed Update dependencies ron winit& fix cargo-deny lists (#3244)
# Objective

- there are a few new versions for `ron`, `winit`, `ndk`, `raw-window-handle`
- `cargo-deny` is failing due to new security issues / duplicated dependencies

## Solution

- Update our dependencies
- Note all new security issues, with which of Bevy direct dependency it comes from
- Update duplicate crate list, with which of Bevy direct dependency it comes from

`notify` is not updated here as it's in #2993
2021-12-09 20:14:00 +00:00
Yoh Deadfall
ffde86efa0 Update to edition 2021 on master (#3028)
Objective
During work on #3009 I've found that not all jobs use actions-rs, and therefore, an previous version of Rust is used for them. So while compilation and other stuff can pass, checking markup and Android build may fail with compilation errors.

Solution
This PR adds `action-rs` for any job running cargo, and updates the edition to 2021.
2021-10-27 00:12:14 +00:00
Carter Anderson
9d453530fa System Param Lifetime Split (#2605)
# Objective

Enable using exact World lifetimes during read-only access . This is motivated by the new renderer's need to allow read-only world-only queries to outlive the query itself (but still be constrained by the world lifetime).

For example:
115b170d1f/pipelined/bevy_pbr2/src/render/mod.rs (L774)

## Solution

Split out SystemParam state and world lifetimes and pipe those lifetimes up to read-only Query ops (and add into_inner for Res). According to every safety test I've run so far (except one), this is safe (see the temporary safety test commit). Note that changing the mutable variants to the new lifetimes would allow aliased mutable pointers (try doing that to see how it affects the temporary safety tests).

The new state lifetime on SystemParam does make `#[derive(SystemParam)]` more cumbersome (the current impl requires PhantomData if you don't use both lifetimes). We can make this better by detecting whether or not a lifetime is used in the derive and adjusting accordingly, but that should probably be done in its own pr.  

## Why is this a draft?

The new lifetimes break QuerySet safety in one very specific case (see the query_set system in system_safety_test). We need to solve this before we can use the lifetimes given.

This is due to the fact that QuerySet is just a wrapper over Query, which now relies on world lifetimes instead of `&self` lifetimes to prevent aliasing (but in systems, each Query has its own implied lifetime, not a centralized world lifetime).  I believe the fix is to rewrite QuerySet to have its own World lifetime (and own the internal reference). This will complicate the impl a bit, but I think it is doable. I'm curious if anyone else has better ideas.

Personally, I think these new lifetimes need to happen. We've gotta have a way to directly tie read-only World queries to the World lifetime. The new renderer is the first place this has come up, but I doubt it will be the last. Worst case scenario we can come up with a second `WorldLifetimeQuery<Q, F = ()>` parameter to enable these read-only scenarios, but I'd rather not add another type to the type zoo.
2021-08-15 20:51:53 +00:00