Create a SystemSet for PixelCameraPlugin's systems

src/lib.rs

@@ -7,21 +7,30 @@ pub mod prelude;
 mod systems;
 pub mod viewport;
 
+/// A [`SystemSet`] for [`PixelCameraPlugin`]'s systems.
+#[derive(SystemSet, Debug, Hash, PartialEq, Eq, Clone, Copy)]
+pub enum CameraSystems {
+    /// The systems that initialize the [`PixelCamera`](components::PixelCamera)
+    /// component when it's added to an entity.
+    Initialization,
+    /// The systems that update the pixel camera's position after every frame.
+    Update,
+}
+
 /// The [`PixelCameraPlugin`] handles initialization and updates of the [`PixelCamera`](components::PixelCamera).
 ///
 /// It also disables [`Msaa`].
 pub struct PixelCameraPlugin;
 impl Plugin for PixelCameraPlugin {
     fn build(&self, app: &mut App) {
-        use crate::systems::*;
+        use systems::*;
 
         app.insert_resource(Msaa::Off).add_systems(
             PostUpdate,
             (
-                init_camera,
-                update_viewport_size,
-                smooth_camera,
-                set_camera_position,
+                init_camera.in_set(CameraSystems::Initialization),
+                (update_viewport_size, smooth_camera, set_camera_position)
+                    .in_set(CameraSystems::Update),
             ),
         );
     }