fix: support gaussian clouds with no gaussian cameras

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bevy_gaussian_splatting"
 description = "bevy gaussian splatting render pipeline plugin"
-version = "2.7.4"
+version = "2.7.5"
 edition = "2021"
 authors = ["mosure <[email protected]>"]
 license = "MIT OR Apache-2.0"

src/camera.rs

@@ -38,7 +38,6 @@ fn apply_camera_warmup(
 ) {
     for mut camera in cameras.iter_mut() {
         if camera.warmup {
-            info!("camera warmup...");
             camera.warmup = false;
         }
     }

src/sort/mod.rs

@@ -271,6 +271,12 @@ fn auto_insert_sorted_entries(
     #[cfg(feature = "buffer_texture")]
     mut images: ResMut<Assets<Image>>,
 ) {
+    let camera_count = gaussian_cameras.iter().len();
+
+    if camera_count == 0 {
+        return;
+    }
+
     for (
         entity,
         gaussian_cloud_handle,
@@ -292,7 +298,7 @@ fn auto_insert_sorted_entries(
         let cloud = cloud.unwrap();
 
         let sorted_entries = sorted_entries_res.add(SortedEntries::new(
-            gaussian_cameras.iter().len(),
+            camera_count,
             cloud.len_sqrt_ceil().pow(2),
             #[cfg(feature = "buffer_texture")]
             images,
@@ -322,6 +328,11 @@ fn update_sorted_entries_sizes(
     let camera_count: usize = gaussian_cameras.iter().len();
 
     for handle in sorted_entries.iter() {
+        if camera_count == 0 {
+            sorted_entries_res.remove(handle);
+            continue;
+        }
+
         let sorted_entries = sorted_entries_res.get(handle).unwrap();
         if sorted_entries.camera_count != camera_count {
             let new_entry = SortedEntries::new(