small optimizations

src/star_renderer.rs

@@ -4,7 +4,6 @@ use bevy::prelude::{Camera, Children, Component, in_state, IntoSystemConfigs, Pa
 use bevy::scene::SceneInstance;
 
 use crate::body::Star;
-use crate::camera::PanOrbitCamera;
 use crate::SimState;
 
 const STAR_IMPOSTER_THRESHOLD: f32 = 4_000.0;
@@ -25,13 +24,13 @@ impl Plugin for StarRendererPlugin {
 pub struct StarBillboard;
 
 fn change_sun_renderer(
-    camera: Query<(&Transform, &PanOrbitCamera, &Camera, Without<Star>, Without<StarBillboard>)>,
-    mut stars: Query<(&Transform, &Children, &mut Star, Without<Camera>, Without<StarBillboard>)>,
+    camera: Query<(&Transform, &Camera, Without<Star>, Without<StarBillboard>)>,
+    mut stars: Query<(&Transform, &Children, Without<Camera>, Without<StarBillboard>)>,
     mut star_billboards: Query<(&mut Transform, &mut Visibility, &Parent, With<StarBillboard>, Without<Camera>, Without<Star>)>,
     mut scenes: Query<(&SceneInstance, &mut Visibility, Without<StarBillboard>, Without<Star>)>,
 ) {
-    let (c_transform, pan_orbit, camera, _, _) = camera.single();
-    for (transform, children, mut star, _, _) in &mut stars {
+    let (c_transform, camera, _, _) = camera.single();
+    for (transform, children, _, _) in &mut stars {
         let distance = c_transform.translation.distance(transform.translation);
         for child in children.iter() {
             if let Ok((_, mut visibility, _ , _)) = scenes.get_mut(*child) {
@@ -52,7 +51,7 @@ fn change_sun_renderer(
     }
 
     for (mut b_transform, _, parent, _, _, _) in &mut star_billboards {
-        let (transform, _, _, _, _) = stars.get(**parent).unwrap();
+        let (transform, _, _, _) = stars.get(**parent).unwrap();
         let distance = c_transform.translation.distance(transform.translation);
         b_transform.look_at(-c_transform.translation, Vec3::Y);
         b_transform.scale = Vec3::splat(distance / STAR_IMPOSTER_DIVIDER);