bevy-parallax 0.1.1

A Bevy plugin for creating a parallax effect.
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# bevy-parallax


A parallax plugin for the [Bevy Engine](https://bevyengine.org/). This plugin allows you to easily create scrolling parallax backgrounds for your games.

![cyberpunk](assets/cyberpunk.gif)

![fishy](assets/fishy.gif)

## Usage


```rust
use bevy::prelude::*;
use bevy_inspector_egui::WorldInspectorPlugin;
use bevy_parallax::{
    LayerData, ParallaxCameraComponent, ParallaxMoveEvent, ParallaxPlugin, ParallaxResource,
};

fn main() {
    let window = WindowDescriptor {
        title: "Window Name".to_string(),
        width: 1280.0,
        height: 720.0,
        vsync: true,
        resizable: false,
        ..Default::default()
    };

    App::new()
        .insert_resource(window)
        .insert_resource(ParallaxResource {
            layer_data: vec![
                LayerData {
                    speed: 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: 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: 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)
        .add_plugin(WorldInspectorPlugin::new())
        .add_plugin(ParallaxPlugin)
        .add_startup_system(initialize_camera_system)
        .add_system(move_camera_system)
        .run();
}

pub fn initialize_camera_system(mut commands: Commands) {
    commands
        .spawn_bundle(OrthographicCameraBundle::new_2d())
        .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: 3.0,
        });
    } else if keyboard_input.pressed(KeyCode::A) || keyboard_input.pressed(KeyCode::Left) {
        move_event_writer.send(ParallaxMoveEvent {
            camera_move_speed: -3.0,
        });
    }
}
```

## Credits

- [Fish World Pack](https://spicylobster.itch.io/fish-world-pack)
- [Warped City 2](https://ansimuz.itch.io/warped-city-2)