Optimize rollback hot paths

src/menus/character_select/mod.rs

@@ -241,7 +241,7 @@ pub fn copy_cursor_transform_to_token(
     character_boxes: Query<(&CharacterBox, &ComputedNode, &UiGlobalTransform)>,
     match_config: Res<MenuMatchConfig>,
     cursors: Query<&UiGlobalTransform, With<FGMenuCursor>>,
-    cam: Single<&Camera>,
+    cam: Single<&Camera, With<IsDefaultUiCamera>>,
     ui_scale: Res<UiScale>,
 ) -> Result {
     let camera = cam.into_inner();

src/menus/cursor.rs

@@ -181,7 +181,7 @@ pub fn cursor_input(
 }
 
 pub fn update_cursor_transform(
-    camera: Single<&Camera>,
+    camera: Single<&Camera, With<IsDefaultUiCamera>>,
     query: Query<(&mut Node, &PointerLocation), With<FGMenuCursor>>,
     ui_scale: Res<UiScale>,
 ) {

src/menus/mod.rs

@@ -25,8 +25,6 @@ pub mod style;
 
 #[derive(Component, Clone, Default)]
 pub struct MenuMarker {}
-#[derive(Component, Clone, Default)]
-pub struct MenuCameraMarker {}
 
 pub struct MenuPlugin;
 
@@ -40,7 +38,6 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
     bsn! {
         #MenuRoot
         MenuMarker
-        Transform
         Node {
             width: percent(100),
             height: percent(100),
@@ -49,11 +46,6 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
             flex_direction: FlexDirection::Column,
         }
         Children [
-            (
-                #MenuCamera
-                Camera
-                Camera2d
-            ),
             (
                 #MenuContainer
                 Node {
@@ -73,18 +65,15 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
 
 pub fn despawn_menu(
     existing_menu: Option<Single<Entity, With<MenuMarker>>>,
-    existing_menu_camera: Option<Single<Entity, With<MenuCameraMarker>>>,
     mut commands: Commands,
 ) {
     if let Some(entity) = existing_menu {
         commands
             .entity(entity.into_inner())
+            .remove::<Camera2d>()
+            .remove::<Camera>()
             .despawn();
     }
-
-    if let Some(menu_cam) = existing_menu_camera {
-        commands.entity(*menu_cam).despawn();
-    }
 }
 
 pub fn spawn_menu(
@@ -95,6 +84,8 @@ pub fn spawn_menu(
     if let Some(entity) = existing_menu {
         commands
             .entity(entity.into_inner())
+            .remove::<Camera2d>()
+            .remove::<Camera>()
             .despawn();
     }
     commands.queue_spawn_scene(wrap_menu(menu));
@@ -123,6 +114,14 @@ impl Plugin for MenuPlugin {
         app.add_systems(
             OnEnter(AppState::MainMenu),
             (build_menu::<MainMenu>, |mut commands: Commands| {
+                commands.spawn((Camera2d, IsDefaultUiCamera));
+                commands.spawn((
+                    Camera2d,
+                    Camera {
+                        order: 1,
+                        ..default()
+                    },
+                ));
             }),
         )
         .add_message::<character_select::PlayerSlotAssigned>()

src/stage/manifest.rs

@@ -7,10 +7,14 @@ use strum::IntoEnumIterator;
 use strum_macros::EnumIter;
 
 use crate::{
-    AppState, game_settings::GameSettings, math::{int::FGi32, vec::FGVec2}, stage::{
+    AppState,
+    game_settings::GameSettings,
+    math::vec::FGVec2,
+    stage::{
         StagePoly,
         line::{StageCollision, StagePolyLineSegmentType, StagePolyType},
-    }, texture_reference::TextureReference,
+    },
+    texture_reference::TextureReference,
 };
 use bevy::prelude::*;
 
@@ -83,14 +87,6 @@ pub struct StageManifest {
     pub icon: TextureReference,
     pub camera: StageCameraProfile,
     pub polygons: Vec<StagePolyDefinition>,
-    #[reflect(ignore)]
-    pub blast_zone_left: FGi32,
-    #[reflect(ignore)]
-    pub blast_zone_right: FGi32,
-    #[reflect(ignore)]
-    pub blast_zone_top: FGi32,
-    #[reflect(ignore)]
-    pub blast_zone_bottom: FGi32,
 }
 
 #[derive(Resource)]