multiple.rs

mod shared;

use bevy::{prelude::*, window::PrimaryWindow};
use bevy_scroller::{Scroller, ScrollerBundle, ScrollerSize, SingleSpriteGenerator};
use shared::get_app;
use std::f32::consts::PI;

fn main() {
  get_app("multiple".into()).add_systems(Startup, start).run();
}

pub fn start(mut commands: Commands, windows: Query<&Window, With<PrimaryWindow>>) {
  let window = windows.get_single().expect("no primary window");
  let sprite_size = Vec2::new(128., 128.);

  commands.spawn(Camera2dBundle::default());

  commands.spawn((
    ScrollerSize {
      size: Vec2::new(window.width(), sprite_size.y),
    },
    ScrollerBundle {
      scroller: Scroller {
        speed: 5.,
        ..default()
      },
      generator: SingleSpriteGenerator {
        path: "gems/1.png".into(),
        size: sprite_size,
      },
      spatial: SpatialBundle::from_transform(Transform::from_translation(Vec3::new(
        0.,
        (sprite_size.y - window.height()) / 2.,
        0.,
      ))),
      ..default()
    },
  ));

  commands.spawn((
    ScrollerSize {
      size: Vec2::new(window.width(), sprite_size.y),
    },
    ScrollerBundle {
      scroller: Scroller {
        speed: 5.,
        ..default()
      },
      generator: SingleSpriteGenerator {
        path: "gems/2.png".into(),
        size: sprite_size,
      },
      spatial: SpatialBundle::from_transform(Transform {
        translation: Vec3::new(0., (window.height() - sprite_size.y) / 2., 0.),
        rotation: Quat::from_rotation_z(PI),
        ..default()
      }),
      ..default()
    },
  ));
}