b6a647cc01
Adds a `default()` shorthand for `Default::default()` ... because life is too short to constantly type `Default::default()`.
```rust
use bevy::prelude::*;
#[derive(Default)]
struct Foo {
bar: usize,
baz: usize,
}
// Normally you would do this:
let foo = Foo {
bar: 10,
..Default::default()
};
// But now you can do this:
let foo = Foo {
bar: 10,
..default()
};
```
The examples have been adapted to use `..default()`. I've left internal crates as-is for now because they don't pull in the bevy prelude, and the ergonomics of each case should be considered individually.
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
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(OrthographicCameraBundle::new_2d());
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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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fn sprite_movement(time: Res<Time>, mut sprite_position: Query<(&mut Direction, &mut Transform)>) {
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for (mut logo, mut transform) in sprite_position.iter_mut() {
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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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