mirror of
https://github.com/bevyengine/bevy
synced 2024-11-22 20:53:53 +00:00
4847f7e3ad
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>
45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
//! Renders a 2D scene containing a single, moving sprite.
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use bevy::prelude::*;
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_startup_system(setup)
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.add_system(sprite_movement)
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.run();
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}
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#[derive(Component)]
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enum Direction {
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Up,
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Down,
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn_bundle(Camera2dBundle::default());
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commands
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.spawn_bundle(SpriteBundle {
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texture: asset_server.load("branding/icon.png"),
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transform: Transform::from_xyz(100., 0., 0.),
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..default()
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})
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.insert(Direction::Up);
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}
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/// The sprite is animated by changing its translation depending on the time that has passed since
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/// the last frame.
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fn sprite_movement(time: Res<Time>, mut sprite_position: Query<(&mut Direction, &mut Transform)>) {
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for (mut logo, mut transform) in &mut sprite_position {
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match *logo {
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Direction::Up => transform.translation.y += 150. * time.delta_seconds(),
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Direction::Down => transform.translation.y -= 150. * time.delta_seconds(),
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}
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if transform.translation.y > 200. {
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*logo = Direction::Down;
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} else if transform.translation.y < -200. {
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*logo = Direction::Up;
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}
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}
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}
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