Base game template

src/main.rs

@@ -1,3 +1,45 @@
+use bevy::camera::ScalingMode;
+use bevy::prelude::*;
+
+pub const WORLD_SIZE: Vec2 = Vec2::new(480., 640.);
+
 fn main() {
+    App::new()
+        .insert_resource(ClearColor(Color::BLACK))
+        .add_plugins(DefaultPlugins.set(WindowPlugin {
+            // Until there's a reliable way to hint that a game window should
+            // float on tiling window managers, the most reliable way to achieve
+            // that is to define a fixed non-resizable window.
+            //
+            // https://github.com/rust-windowing/winit/issues/862#issuecomment-2047791401
+            primary_window: Some(Window {
+                resize_constraints: WindowResizeConstraints {
+                    min_width: WORLD_SIZE.x,
+                    min_height: WORLD_SIZE.y,
+                    max_width: WORLD_SIZE.x,
+                    max_height: WORLD_SIZE.y,
+                },
+                ..default()
+            }),
+            ..default()
+        }))
+        .add_systems(Startup, (setup, greet).chain())
+        .run();
+}
+
+fn setup(mut commands: Commands) {
+    commands.spawn((
+        Camera2d,
+        Projection::Orthographic(OrthographicProjection {
+            scaling_mode: ScalingMode::Fixed {
+                width: WORLD_SIZE.x,
+                height: WORLD_SIZE.y,
+            },
+            ..OrthographicProjection::default_2d()
+        }),
+    ));
+}
+
+fn greet() {
     println!("Hello, world!");
 }