bevy-parallax
A parallax plugin for the Bevy Engine. This plugin allows you to easily create scrolling parallax backgrounds for your games.
Usage
use bevy::prelude::*;
use bevy_parallax::{
LayerSpeed, LayerData, ParallaxCameraComponent, ParallaxMoveEvent, ParallaxPlugin, ParallaxResource, ParallaxSystems
};
fn main() {
let primary_window = Window {
title: "Window Name".to_string(),
resolution: (1280.0, 720.0).into(),
resizable: false,
..Default::default()
};
App::new()
.insert_resource(ParallaxResource {
layer_data: vec![
LayerData {
speed: LayerSpeed::Horizontal(0.9),
path: "back.png".to_string(),
tile_size: Vec2::new(96.0, 160.0),
cols: 1,
rows: 1,
scale: 4.5,
z: 0.0,
..Default::default()
},
LayerData {
speed: LayerSpeed::Horizontal(0.6),
path: "middle.png".to_string(),
tile_size: Vec2::new(144.0, 160.0),
cols: 1,
rows: 1,
scale: 4.5,
z: 1.0,
..Default::default()
},
LayerData {
speed: LayerSpeed::Horizontal(0.1),
path: "front.png".to_string(),
tile_size: Vec2::new(272.0, 160.0),
cols: 1,
rows: 1,
scale: 4.5,
z: 2.0,
..Default::default()
},
],
..Default::default()
})
.add_plugins(
DefaultPlugins
.set(WindowPlugin {
primary_window: Some(primary_window),
..default()
})
// Use nearest filtering so our pixel art renders clear
.set(ImagePlugin::default_nearest()),
)
.add_plugin(ParallaxPlugin)
.add_startup_system(initialize_camera_system)
.add_system(move_camera_system.before(ParallaxSystems))
.run();
}
pub fn initialize_camera_system(mut commands: Commands) {
commands
.spawn_bundle(Camera2dBundle::default())
.insert(ParallaxCameraComponent);
}
pub fn move_camera_system(
keyboard_input: Res<Input<KeyCode>>,
mut move_event_writer: EventWriter<ParallaxMoveEvent>,
) {
if keyboard_input.pressed(KeyCode::D) || keyboard_input.pressed(KeyCode::Right) {
move_event_writer.send(ParallaxMoveEvent {
camera_move_speed: Vec2::new(3.0, 0.0),
});
} else if keyboard_input.pressed(KeyCode::A) || keyboard_input.pressed(KeyCode::Left) {
move_event_writer.send(ParallaxMoveEvent {
camera_move_speed: Vec2::new(-3.0, 0.0),
});
}
}