simplify skybox code

src/world.rs

@@ -2,43 +2,27 @@ use crate::camera;
 use bevy::prelude::*;
 use bevy::core_pipeline::Skybox;
 use bevy::asset::LoadState;
-use bevy::render::{
+use bevy::render::render_resource::{TextureViewDescriptor, TextureViewDimension};
-    render_resource::{TextureViewDescriptor, TextureViewDimension},
-    renderer::RenderDevice,
-    texture::CompressedImageFormats,
-};
 
 #[derive(Resource)]
 pub struct Cubemap {
     is_loaded: bool,
-    index: usize,
     image_handle: Handle<Image>,
 }
 
-const CUBEMAPS: &[(&str, CompressedImageFormats)] = &[
+const CUBEMAP_PATH: &str = "textures/stars_cubemap.png";
-    (
-        "textures/stars_cubemap.png",
-        CompressedImageFormats::NONE,
-    ),
-];
 
 pub fn setup(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
 ) {
-    let skybox_handle = asset_server.load(CUBEMAPS[0].0);
+    let skybox_handle = asset_server.load(CUBEMAP_PATH);
     commands.spawn((
         Camera3dBundle {
             transform: Transform::from_xyz(0.0, 0.0, 8.0).looking_at(Vec3::ZERO, Vec3::Y),
             ..default()
         },
         camera::CameraController::default(),
-        Skybox {
-            image: asset_server.load(CUBEMAPS[0].0).clone(),
-            brightness: 150.0,
-        },
-    ));
-    commands.spawn((
         Skybox {
             image: skybox_handle.clone(),
             brightness: 150.0,
@@ -46,7 +30,6 @@ pub fn setup(
     ));
     commands.insert_resource(Cubemap {
         is_loaded: false,
-        index: 0,
         image_handle: skybox_handle,
     });
 }
@@ -54,32 +37,11 @@ pub fn setup(
 pub fn load_cubemap_asset(
     mut cubemap: ResMut<Cubemap>,
     asset_server: Res<AssetServer>,
-    render_device: Res<RenderDevice>,
 ) {
-    let supported_compressed_formats =
+    cubemap.image_handle = asset_server.load(CUBEMAP_PATH);
-        CompressedImageFormats::from_features(render_device.features());
-
-    let mut new_index = cubemap.index;
-    for _ in 0..CUBEMAPS.len() {
-        new_index = (new_index + 1) % CUBEMAPS.len();
-        if supported_compressed_formats.contains(CUBEMAPS[new_index].1) {
-            break;
-        }
-        info!("Skipping unsupported format: {:?}", CUBEMAPS[new_index]);
-    }
-
-    // Skip swapping to the same texture. Useful for when ktx2, zstd, or compressed texture support
-    // is missing
-    if new_index == cubemap.index {
-        return;
-    }
-
-    cubemap.index = new_index;
-    cubemap.image_handle = asset_server.load(CUBEMAPS[cubemap.index].0);
     cubemap.is_loaded = false;
 }
 
-
 pub fn asset_loaded(
     asset_server: Res<AssetServer>,
     mut images: ResMut<Assets<Image>>,
@@ -87,10 +49,7 @@ pub fn asset_loaded(
     mut skyboxes: Query<&mut Skybox>,
 ) {
     if !cubemap.is_loaded && asset_server.load_state(&cubemap.image_handle) == LoadState::Loaded {
-        info!("Swapping to {}...", CUBEMAPS[cubemap.index].0);
         let image = images.get_mut(&cubemap.image_handle).unwrap();
-        // NOTE: PNGs do not have any metadata that could indicate they contain a cubemap texture,
-        // so they appear as one texture. The following code reconfigures the texture as necessary.
         if image.texture_descriptor.array_layer_count() == 1 {
             image.reinterpret_stacked_2d_as_array(image.height() / image.width());
             image.texture_view_descriptor = Some(TextureViewDescriptor {