45 lines
1.2 KiB
Rust
45 lines
1.2 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_systems(Startup, setup)
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.add_systems(Update, 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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Left,
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Right,
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn(Camera2d);
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commands.spawn((
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Sprite::from_image(asset_server.load("branding/icon.png")),
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Transform::from_xyz(0., 0., 0.),
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Direction::Right,
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));
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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::Right => transform.translation.x += 150. * time.delta_secs(),
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Direction::Left => transform.translation.x -= 150. * time.delta_secs(),
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}
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if transform.translation.x > 200. {
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*logo = Direction::Left;
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} else if transform.translation.x < -200. {
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*logo = Direction::Right;
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}
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}
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}
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