rotating bevy

rotating_bevy.rs

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_startup_system(setup)
        .add_system(update)
        .run();
}

fn setup(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    let texture_handle = asset_server.load("branding/icon.png");
    commands.spawn_bundle(OrthographicCameraBundle::new_2d());
    commands.spawn_bundle(SpriteBundle {
        material: materials.add(texture_handle.into()),
        ..Default::default()
    });
}

fn update(mut query: Query<&mut Transform, With<Sprite>>, mut angle: Local<f32>) {
    for mut transform in query.iter_mut() {
        *angle += 0.01;
        transform.rotation = Quat::from_rotation_z(*angle);
        println!("{}", *angle);
    }
}