camera ui

src/camera.rs

@@ -17,8 +17,12 @@ pub struct CameraRotation(pub f32);
 #[reflect(Resource)]
 pub struct CameraState {
     pub cutscene: bool,
+    pub look_around: bool,
 }
 
+#[derive(Component, Reflect, Debug, Default)]
+struct CameraUi;
+
 #[derive(Component, Reflect, Debug)]
 #[reflect(Component)]
 pub struct MainCamera {
@@ -40,7 +44,16 @@ pub fn plugin(app: &mut App) {
 
     app.init_resource::<CameraState>();
     app.add_systems(Startup, startup);
-    app.add_systems(Update, (update, rotate_view_keyboard, rotate_view_gamepad));
+    app.add_systems(
+        Update,
+        (
+            update,
+            update_ui,
+            update_look_around,
+            rotate_view_keyboard,
+            rotate_view_gamepad,
+        ),
+    );
 }
 
 fn startup(mut commands: Commands) {
@@ -51,6 +64,54 @@ fn startup(mut commands: Commands) {
     ));
 }
 
+fn update_look_around(controls: Res<Controls>, mut cam_state: ResMut<CameraState>) {
+    let look_around =
+        controls.keyboard_state.view_mode || controls.gamepad_state.map_or(false, |g| g.view_mode);
+
+    if look_around != cam_state.look_around {
+        cam_state.look_around = look_around;
+    }
+}
+
+fn update_ui(
+    mut commands: Commands,
+    cam_state: Res<CameraState>,
+    asset_server: Res<AssetServer>,
+    query: Query<Entity, With<CameraUi>>,
+) {
+    if cam_state.is_changed() {
+        let show_ui = cam_state.look_around || cam_state.cutscene;
+
+        if show_ui {
+            let image = asset_server.load("ui/camera.png");
+
+            commands
+                .spawn((
+                    CameraUi,
+                    Node {
+                        margin: UiRect::top(Val::Px(20.))
+                            .with_left(Val::Auto)
+                            .with_right(Val::Auto),
+                        justify_content: JustifyContent::Center,
+                        ..default()
+                    },
+                ))
+                .with_child((
+                    Node {
+                        display: Display::Block,
+                        position_type: PositionType::Absolute,
+                        ..default()
+                    },
+                    ImageNode::new(image),
+                ));
+        } else {
+            for entity in query.iter() {
+                commands.entity(entity).despawn_recursive();
+            }
+        }
+    }
+}
+
 fn update(
     mut cam: Query<
         (&MainCamera, &mut Transform, &CameraRotation),