Rename light visibility class (#19986)

# Objective

- prepare bevy_light for split
- make struct named better
- put it where it belongs

## Solution

- do those things

## Testing

- 3d_scene, lighting

---------

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

crates/bevy_pbr/src/cluster/extract_and_prepare.rs

@@ -13,7 +13,8 @@ use bevy_render::{
 };
 use tracing::warn;
 
-use crate::{cluster::ClusterableObjectCounts, Clusters, GlobalClusterSettings, MeshPipeline};
+use super::{ClusterableObjectCounts, Clusters, GlobalClusterSettings};
+use crate::MeshPipeline;
 
 // NOTE: this must be kept in sync with the same constants in
 // `mesh_view_types.wgsl`.

crates/bevy_pbr/src/cluster/mod.rs

@@ -22,7 +22,6 @@ use bevy_transform::components::Transform;
 use tracing::warn;
 
 pub(crate) use crate::cluster::assign::assign_objects_to_clusters;
-use crate::LightVisibilityClass;
 
 pub(crate) mod assign;
 mod extract_and_prepare;
@@ -115,6 +114,11 @@ pub struct Clusters {
     pub(crate) clusterable_objects: Vec<VisibleClusterableObjects>,
 }
 
+/// The [`VisibilityClass`] used for clusterables (decals, point lights, directional lights, and spot lights).
+///
+/// [`VisibilityClass`]: bevy_camera::visibility::VisibilityClass
+pub struct ClusterVisibilityClass;
+
 #[derive(Clone, Component, Debug, Default)]
 pub struct VisibleClusterableObjects {
     pub(crate) entities: Vec<Entity>,
@@ -157,7 +161,7 @@ struct ClusterableObjectCounts {
 #[derive(Component, Debug, Clone, Reflect, ExtractComponent)]
 #[reflect(Component, Debug, Clone)]
 #[require(Transform, Visibility, VisibilityClass)]
-#[component(on_add = visibility::add_visibility_class::<LightVisibilityClass>)]
+#[component(on_add = visibility::add_visibility_class::<ClusterVisibilityClass>)]
 pub struct ClusteredDecal {
     /// The image that the clustered decal projects.
     ///

crates/bevy_pbr/src/light/directional_light.rs

@@ -10,7 +10,8 @@ use bevy_image::Image;
 use bevy_reflect::prelude::*;
 use bevy_transform::components::Transform;
 
-use crate::{cascade::CascadeShadowConfig, light_consts, Cascades, LightVisibilityClass};
+use super::{cascade::CascadeShadowConfig, light_consts, Cascades};
+use crate::cluster::ClusterVisibilityClass;
 
 /// A Directional light.
 ///
@@ -63,7 +64,7 @@ use crate::{cascade::CascadeShadowConfig, light_consts, Cascades, LightVisibilit
     Visibility,
     VisibilityClass
 )]
-#[component(on_add = visibility::add_visibility_class::<LightVisibilityClass>)]
+#[component(on_add = visibility::add_visibility_class::<ClusterVisibilityClass>)]
 pub struct DirectionalLight {
     /// The color of the light.
     ///

crates/bevy_pbr/src/light/mod.rs

@@ -16,23 +16,24 @@ use bevy_transform::{components::GlobalTransform, TransformSystems};
 use bevy_utils::Parallel;
 use core::ops::DerefMut;
 
-pub use crate::light::spot_light::{spot_light_clip_from_view, spot_light_world_from_view};
-use crate::{
-    add_clusters, assign_objects_to_clusters,
-    cascade::{build_directional_light_cascades, clear_directional_light_cascades},
-    CascadeShadowConfig, Cascades, VisibleClusterableObjects,
-};
+use crate::cluster::{add_clusters, assign_objects_to_clusters, VisibleClusterableObjects};
 
 mod ambient_light;
 pub use ambient_light::AmbientLight;
-
 pub mod cascade;
+use cascade::{
+    build_directional_light_cascades, clear_directional_light_cascades, CascadeShadowConfig,
+    Cascades,
+};
 mod point_light;
 pub use point_light::{
     update_point_light_frusta, PointLight, PointLightShadowMap, PointLightTexture,
 };
 mod spot_light;
-pub use spot_light::{update_spot_light_frusta, SpotLight, SpotLightTexture};
+pub use spot_light::{
+    spot_light_clip_from_view, spot_light_world_from_view, update_spot_light_frusta, SpotLight,
+    SpotLightTexture,
+};
 mod directional_light;
 pub use directional_light::{
     update_directional_light_frusta, DirectionalLight, DirectionalLightShadowMap,
@@ -243,11 +244,6 @@ pub enum ShadowFilteringMethod {
     Temporal,
 }
 
-/// The [`VisibilityClass`] used for all lights (point, directional, and spot).
-///
-/// [`VisibilityClass`]: bevy_camera::visibility::VisibilityClass
-pub struct LightVisibilityClass;
-
 /// System sets used to run light-related systems.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, SystemSet)]
 pub enum SimulationLightSystems {

crates/bevy_pbr/src/light/point_light.rs

@@ -10,7 +10,7 @@ use bevy_math::Mat4;
 use bevy_reflect::prelude::*;
 use bevy_transform::components::{GlobalTransform, Transform};
 
-use crate::{GlobalVisibleClusterableObjects, LightVisibilityClass};
+use crate::cluster::{ClusterVisibilityClass, GlobalVisibleClusterableObjects};
 
 /// A light that emits light in all directions from a central point.
 ///
@@ -44,7 +44,7 @@ use crate::{GlobalVisibleClusterableObjects, LightVisibilityClass};
     Visibility,
     VisibilityClass
 )]
-#[component(on_add = visibility::add_visibility_class::<LightVisibilityClass>)]
+#[component(on_add = visibility::add_visibility_class::<ClusterVisibilityClass>)]
 pub struct PointLight {
     /// The color of this light source.
     pub color: Color,

crates/bevy_pbr/src/light/spot_light.rs

@@ -11,7 +11,7 @@ use bevy_reflect::prelude::*;
 use bevy_render::view::VisibleMeshEntities;
 use bevy_transform::components::{GlobalTransform, Transform};
 
-use crate::{GlobalVisibleClusterableObjects, LightVisibilityClass};
+use crate::cluster::{ClusterVisibilityClass, GlobalVisibleClusterableObjects};
 
 /// A light that emits light in a given direction from a central point.
 ///
@@ -21,7 +21,7 @@ use crate::{GlobalVisibleClusterableObjects, LightVisibilityClass};
 #[derive(Component, Debug, Clone, Copy, Reflect)]
 #[reflect(Component, Default, Debug, Clone)]
 #[require(Frustum, VisibleMeshEntities, Transform, Visibility, VisibilityClass)]
-#[component(on_add = visibility::add_visibility_class::<LightVisibilityClass>)]
+#[component(on_add = visibility::add_visibility_class::<ClusterVisibilityClass>)]
 pub struct SpotLight {
     /// The color of the light.
     ///

release-content/migration-guides/LightVisibilityClass_rename.md

@@ -0,0 +1,8 @@
+---
+title: `LightVisibilityClass` renamed to `ClusterVisibilityClass`
+pull_requests: [19986]
+---
+
+When clustered decals were added, they used `LightVisibilityClass` to share the clustering infrastructure.
+This revealed that this visibility class wasn't really about lights, but about clustering.
+It has been renamed to `ClusterVisibilityClass` and moved to live alongside clustering-specific types.