move spatial setup to SpatialPlugin

src/astronomy/orbit.rs

@@ -1,9 +1,6 @@
-use std::time::Duration;
-
 use bevy::prelude::*;
-use bevy_spatial::{AutomaticUpdate, SpatialStructure};
 
-use crate::resources::{game_time::GameTime, spatial::KDNode, state::GameState};
+use crate::resources::{game_time::GameTime, state::GameState};
 
 const ORBITAL_PERIOD_SCALING_FACTOR: f32 = 1.0;
 
@@ -30,11 +27,6 @@ impl Default for Orbitable {
 pub struct OrbitPlugin;
 impl Plugin for OrbitPlugin {
     fn build(&self, app: &mut App) {
-        app.add_plugins(
-            AutomaticUpdate::<KDNode>::new()
-                .with_spatial_ds(SpatialStructure::KDTree2)
-                .with_frequency(Duration::from_millis(1)),
-        );
         app.add_systems(
             Update,
             (orbitable_update_system, orbital_positioning_system)

src/main.rs

@@ -25,6 +25,7 @@ use crate::{
         assets::{AudioAssets, SpriteAssets, UiAssets},
         camera::CameraPlugin,
         game_time::GameTimePlugin,
+        spatial::SpatialPlugin,
         state::{GameState, StatePlugin},
     },
     ship::ShipPlugin,
@@ -61,6 +62,10 @@ fn main() {
         PlanetarySystemPlugin,
     ));
 
+    // You can only add 15 plugins to add_plugins
+    // I need to start refactoring.
+    app.add_plugins(SpatialPlugin);
+
     #[cfg(debug_assertions)]
     app.add_plugins((
         RapierDebugRenderPlugin::default(),

src/resources/spatial.rs

@@ -1,4 +1,18 @@
+use std::time::Duration;
+
 use bevy::prelude::*;
+use bevy_spatial::{AutomaticUpdate, SpatialStructure};
 
 #[derive(Component)]
 pub struct KDNode;
+
+pub struct SpatialPlugin;
+impl Plugin for SpatialPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_plugins(
+            AutomaticUpdate::<KDNode>::new()
+                .with_spatial_ds(SpatialStructure::KDTree2)
+                .with_frequency(Duration::from_millis(1)),
+        );
+    }
+}