I can haz UI?

mini-game/src/main.rs

@@ -5,8 +5,6 @@ use bevy::app::ScheduleRunnerPlugin;
 use bevy::camera::RenderTarget;
 use bevy::color::Color;
 use bevy::prelude::*;
-use bevy::render::RenderPlugin;
-use bevy::winit::WinitPlugin;
 use wgpu::{TextureFormat, TextureUsages};
 
 mod post_process;
@@ -21,19 +19,21 @@ mod shared;
 fn main() {
     App::new()
         .add_plugins((
-            DefaultPlugins
-                .set(RenderPlugin {
-                    synchronous_pipeline_compilation: true,
+            DefaultPlugins.set(WindowPlugin {
+                primary_window: Some(Window {
+                    resolution: bevy::window::WindowResolution::new(160 * 4, 43 * 4)
+                        .with_scale_factor_override(4.0),
                     ..default()
-                })
-                .build()
-                .disable::<WinitPlugin>(),
+                }),
+                ..default()
+            }),
             ScheduleRunnerPlugin::run_loop(Duration::from_secs_f64(1. / 30.)),
             post_process::PostProcessPlugin,
             ImageExportPlugin,
         ))
-        .insert_resource(ClearColor(Color::linear_rgba(0.0, 0.0, 0.0, 1.0)))
+        .insert_resource(ClearColor(Color::linear_rgba(0.0, 0.0, 0.0, 0.0)))
         .add_systems(Startup, setup_scene_system)
+        .add_systems(PostStartup, spawn_in_ui)
         .add_systems(Update, rotate_cube)
         .run();
 }
@@ -66,18 +66,44 @@ fn setup_scene_system(
         Camera::default(),
         RenderTarget::Image(image_handle.clone().into()),
         Transform::from_xyz(0.0, 1.0, 2.5).looking_at(Vec3::ZERO, Vec3::Y),
+        UiAntiAlias::Off,
         PostProcessSettings { scale: 1.0 },
     ));
 
     commands.spawn((ImageExport(export_sources.add(image_handle)),));
 }
 
+fn spawn_in_ui(mut commands: Commands, assets: Res<AssetServer>, camera: Query<(Entity, &Camera)>) {
+    let font: Handle<Font> = assets.load("fonts/Roboto-Bold.ttf");
+
+    let text_font = TextFont::from(font.clone())
+        .with_font_size(12.)
+        .with_font_smoothing(bevy::text::FontSmoothing::None);
+
+    let Ok(main_camera) = camera.single() else {
+        return; // no camera... yet?
+    };
+
+    commands.spawn((
+        Node {
+            position_type: PositionType::Absolute,
+            top: Val::Px(5.0),
+            left: Val::Px(5.0),
+            ..default()
+        },
+        Text::new("Hello World!"),
+        text_font.clone(),
+        TextColor(Color::WHITE),
+        UiTargetCamera(main_camera.0),
+    ));
+}
+
 fn rotate_cube(
     mut cubes: Query<(&mut Transform, &Spinner)>,
     timer: Res<Time>,
     g13: Res<G13Resource>,
 ) {
-    const DEADZONE: i32 = 30;
+    const DEADZONE: i32 = 35;
 
     let g13 = g13.g13.state();
     let mut x = g13.x as f32 / 512.0;