feat: flatscreen only mode when passing --flatscreen or -f

Signed-off-by: Schmarni <marnistromer@gmail.com>

src/objects/input/oxr_controller.rs

@@ -60,7 +60,7 @@ impl Plugin for ControllerPlugin {
 		);
 		app.add_systems(XrPreDestroySession, destroy_spaces);
 		app.add_systems(Startup, setup.run_if(resource_exists::<OxrInstance>));
-		app.add_systems(PreFrameWait, update);
+		app.add_systems(PreFrameWait, update.run_if(resource_exists::<Controllers>));
 	}
 }
 

src/objects/input/oxr_hand.rs

@@ -31,7 +31,7 @@ use super::{CaptureManager, get_sorted_handlers};
 pub struct HandPlugin;
 impl Plugin for HandPlugin {
 	fn build(&self, app: &mut App) {
-		app.add_systems(PreFrameWait, update_hands);
+		app.add_systems(PreFrameWait, update_hands.run_if(resource_exists::<Hands>));
 		app.add_systems(XrSessionCreated, create_trackers);
 		app.add_systems(XrPreDestroySession, destroy_trackers);
 		app.add_systems(PostUpdate, update_hand_material);