bevy_light/

lib.rs

//! Provides component types for lighting a bevy scene. This includes the usual
//! directional, point, and spot lights, as well as light probes, atmosphere,
//! other volumetrics, and shadow configuration.

extern crate alloc;

use bevy_app::{App, Plugin, PostUpdate, Update};
use bevy_asset::{AssetApp, AssetEventSystems};
use bevy_camera::{
    primitives::{Aabb, CascadesFrusta, CubemapFrusta, Frustum, Sphere},
    visibility::{
        CascadesVisibleEntities, CubemapVisibleEntities, InheritedVisibility, NoCpuCulling,
        NoFrustumCulling, RenderLayers, ViewVisibility, VisibilityRange, VisibilitySystems,
        VisibleEntities, VisibleEntityRanges, VisibleMeshEntities,
    },
    Camera, Camera3d, CameraUpdateSystems, RenderTarget, ShadowLodOrigin,
};
use bevy_ecs::{entity::EntityHashSet, prelude::*, system::QueryLens};
#[cfg(feature = "bevy_gizmos")]
use bevy_gizmos::frustum::FrustumGizmoSystems;
use bevy_log::warn_once;
use bevy_math::Vec3A;
use bevy_mesh::Mesh3d;
use bevy_reflect::prelude::*;
use bevy_transform::{components::GlobalTransform, TransformSystems};
use bevy_utils::Parallel;
use core::{any::TypeId, mem, ops::DerefMut};
use smallvec::{smallvec, SmallVec};

pub mod cluster;
use cluster::assign::assign_objects_to_clusters;
pub use cluster::ClusteredDecal;
mod ambient_light;
pub use ambient_light::{AmbientLight, GlobalAmbientLight};
use bevy_camera::visibility::SetViewVisibility;

mod probe;
pub use probe::{
    automatically_add_parallax_correction_components, AtmosphereEnvironmentMapLight,
    EnvironmentMapLight, GeneratedEnvironmentMapLight, IrradianceVolume, LightProbe,
    ParallaxCorrection, Skybox,
};
pub mod atmosphere;
pub use atmosphere::Atmosphere;
mod volumetric;
pub use volumetric::{FogVolume, VolumetricFog, VolumetricLight};
pub mod cascade;
use cascade::build_directional_light_cascades;
pub use cascade::{CascadeShadowConfig, CascadeShadowConfigBuilder, Cascades};
mod point_light;
pub use point_light::{
    update_point_light_frusta, PointLight, PointLightShadowMap, PointLightTexture,
};
mod spot_light;
pub use spot_light::{
    orthonormalize, 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,
    DirectionalLightTexture, SunDisk,
};
mod rect_light;
pub use rect_light::RectLight;
/// Provides gizmo drawing for visualizing light positions.
#[cfg(feature = "bevy_gizmos")]
pub mod gizmos;

/// The light prelude.
///
/// This includes the most common types in this crate, re-exported for your convenience.
pub mod prelude {
    #[doc(hidden)]
    pub use crate::{
        light_consts, AmbientLight, DirectionalLight, EnvironmentMapLight,
        GeneratedEnvironmentMapLight, GlobalAmbientLight, LightProbe, PointLight, RectLight,
        SpotLight,
    };

    #[doc(hidden)]
    #[cfg(feature = "bevy_gizmos")]
    pub use crate::gizmos::{LightGizmoColor, LightGizmoConfigGroup, ShowLightGizmo};
}

use crate::{
    atmosphere::{extract_chromatic_phase_textures, ScatteringMedium},
    cluster::{add_light_probe_and_decal_aabbs, ClusterVisibilityClass, Clusters},
    directional_light::validate_shadow_map_size,
    point_light::update_point_light_bounding_spheres,
    spot_light::update_spot_light_bounding_spheres,
};

/// Constants for operating with the light units: lumens, and lux.
pub mod light_consts {
    /// Approximations for converting the wattage of lamps to lumens.
    ///
    /// The **lumen** (symbol: **lm**) is the unit of [luminous flux], a measure
    /// of the total quantity of [visible light] emitted by a source per unit of
    /// time, in the [International System of Units] (SI).
    ///
    /// For more information, see [wikipedia](https://en.wikipedia.org/wiki/Lumen_(unit))
    ///
    /// [luminous flux]: https://en.wikipedia.org/wiki/Luminous_flux
    /// [visible light]: https://en.wikipedia.org/wiki/Visible_light
    /// [International System of Units]: https://en.wikipedia.org/wiki/International_System_of_Units
    pub mod lumens {
        /// The conversion factor used to determine how many lumens a typical LED light of a given wattage produces.
        pub const LUMENS_PER_LED_WATTS: f32 = 90.0;
        /// The conversion factor used to determine how many lumens a typical incandescent light of a given wattage produces.
        pub const LUMENS_PER_INCANDESCENT_WATTS: f32 = 13.8;
        /// The conversion factor used to determine how many lumens a typical halogen light of a given wattage produces.
        pub const LUMENS_PER_HALOGEN_WATTS: f32 = 19.8;
        /// 1,000,000 lumens is a very large "cinema light" capable of registering brightly at Bevy's
        /// default [`bevy_camera::Exposure::BLENDER`] exposure level. For "indoor lighting" with a lower exposure,
        /// this would be way too bright.
        pub const VERY_LARGE_CINEMA_LIGHT: f32 = 1_000_000.0;
    }

    /// Predefined for lux values in several locations.
    ///
    /// The **lux** (symbol: **lx**) is the unit of [illuminance], or [luminous flux] per unit area,
    /// in the [International System of Units] (SI). It is equal to one lumen per square meter.
    ///
    /// For more information, see [wikipedia](https://en.wikipedia.org/wiki/Lux)
    ///
    /// [illuminance]: https://en.wikipedia.org/wiki/Illuminance
    /// [luminous flux]: https://en.wikipedia.org/wiki/Luminous_flux
    /// [International System of Units]: https://en.wikipedia.org/wiki/International_System_of_Units
    pub mod lux {
        /// The amount of light (lux) in a moonless, overcast night sky. (starlight)
        pub const MOONLESS_NIGHT: f32 = 0.0001;
        /// The amount of light (lux) during a full moon on a clear night.
        pub const FULL_MOON_NIGHT: f32 = 0.05;
        /// The amount of light (lux) during the dark limit of civil twilight under a clear sky.
        pub const CIVIL_TWILIGHT: f32 = 3.4;
        /// The amount of light (lux) in family living room lights.
        pub const LIVING_ROOM: f32 = 50.;
        /// The amount of light (lux) in an office building's hallway/toilet lighting.
        pub const HALLWAY: f32 = 80.;
        /// The amount of light (lux) in very dark overcast day
        pub const DARK_OVERCAST_DAY: f32 = 100.;
        /// The amount of light (lux) in an office.
        pub const OFFICE: f32 = 320.;
        /// The amount of light (lux) during sunrise or sunset on a clear day.
        pub const CLEAR_SUNRISE: f32 = 400.;
        /// The amount of light (lux) on an overcast day; typical TV studio lighting
        pub const OVERCAST_DAY: f32 = 1000.;
        /// The amount of light (lux) from ambient daylight (not direct sunlight).
        /// This is the default for [`DirectionalLight`](crate::DirectionalLight)s in Bevy.
        pub const AMBIENT_DAYLIGHT: f32 = 10_000.;
        /// The amount of light (lux) in full daylight (not direct sun).
        pub const FULL_DAYLIGHT: f32 = 20_000.;
        /// The amount of light (lux) in direct sunlight.
        pub const DIRECT_SUNLIGHT: f32 = 100_000.;
        /// The amount of light (lux) of raw sunlight, not filtered by the atmosphere.
        pub const RAW_SUNLIGHT: f32 = 130_000.;
    }
}

/// Sets up all the light visibility and clustering infrastructure needed for rendering lights.
#[derive(Default)]
pub struct LightPlugin;

impl Plugin for LightPlugin {
    fn build(&self, app: &mut App) {
        app.init_resource::<GlobalAmbientLight>()
            .init_resource::<DirectionalLightShadowMap>()
            .init_resource::<PointLightShadowMap>()
            .init_asset::<ScatteringMedium>()
            .register_required_components::<Camera3d, Clusters>()
            .configure_sets(
                PostUpdate,
                SimulationLightSystems::CheckLightVisibility
                    .ambiguous_with(SimulationLightSystems::CheckLightVisibility),
            )
            .add_systems(Update, automatically_add_parallax_correction_components)
            .add_systems(
                PostUpdate,
                (
                    validate_shadow_map_size.before(build_directional_light_cascades),
                    assign_objects_to_clusters
                        .in_set(SimulationLightSystems::AssignLightsToClusters)
                        .after(TransformSystems::Propagate)
                        .after(VisibilitySystems::CheckVisibility)
                        .after(CameraUpdateSystems),
                    update_directional_light_frusta
                        .in_set(SimulationLightSystems::UpdateLightFrusta)
                        // This must run after CheckVisibility because it relies on `ViewVisibility`
                        .after(VisibilitySystems::CheckVisibility)
                        .after(TransformSystems::Propagate)
                        .after(SimulationLightSystems::UpdateDirectionalLightCascades)
                        // We assume that no entity will be both a directional light and a spot light,
                        // so these systems will run independently of one another.
                        // FIXME: Add an archetype invariant for this https://github.com/bevyengine/bevy/issues/1481.
                        .ambiguous_with(update_spot_light_frusta),
                    update_point_light_frusta
                        .in_set(SimulationLightSystems::UpdateLightFrusta)
                        .after(TransformSystems::Propagate)
                        .after(SimulationLightSystems::AssignLightsToClusters),
                    #[cfg(feature = "bevy_gizmos")]
                    update_spot_light_frusta
                        .in_set(SimulationLightSystems::UpdateLightFrusta)
                        .before(FrustumGizmoSystems)
                        .after(TransformSystems::Propagate)
                        .after(SimulationLightSystems::AssignLightsToClusters),
                    #[cfg(not(feature = "bevy_gizmos"))]
                    update_spot_light_frusta
                        .in_set(SimulationLightSystems::UpdateLightFrusta)
                        .after(TransformSystems::Propagate)
                        .after(SimulationLightSystems::AssignLightsToClusters),
                    (
                        check_dir_light_mesh_visibility,
                        check_point_light_mesh_visibility,
                    )
                        .in_set(SimulationLightSystems::CheckLightVisibility)
                        .after(VisibilitySystems::CalculateBounds)
                        .after(TransformSystems::Propagate)
                        .after(SimulationLightSystems::UpdateLightFrusta)
                        // Lights can "see" entities and mark them as visible. This is done to
                        // correctly render shadows for entities that are not in view of a camera,
                        // but must be renderable to cast shadows. Because of this, we need to check
                        // entity visibility and mark as visible before they can be hidden.
                        .after(VisibilitySystems::CheckVisibility)
                        .before(VisibilitySystems::MarkNewlyHiddenEntitiesInvisible),
                    (
                        update_point_light_bounding_spheres.after(TransformSystems::Propagate),
                        update_spot_light_bounding_spheres.after(TransformSystems::Propagate),
                        add_light_probe_and_decal_aabbs,
                    )
                        .in_set(SimulationLightSystems::UpdateBounds)
                        .before(VisibilitySystems::UpdateFrusta),
                    build_directional_light_cascades
                        .in_set(SimulationLightSystems::UpdateDirectionalLightCascades)
                        .after(TransformSystems::Propagate)
                        .after(CameraUpdateSystems),
                    extract_chromatic_phase_textures.after(AssetEventSystems),
                ),
            );

        #[cfg(feature = "bevy_gizmos")]
        app.add_plugins(gizmos::LightGizmoPlugin);
    }
}

/// A convenient alias for `Or<(With<PointLight>, With<SpotLight>,
/// With<DirectionalLight>, With<RectLight>)>`, for use with [`bevy_camera::visibility::VisibleEntities`].
pub type WithLight = Or<(
    With<PointLight>,
    With<SpotLight>,
    With<DirectionalLight>,
    With<RectLight>,
)>;

/// Add this component to make a [`Mesh3d`] not cast shadows.
#[derive(Debug, Component, Reflect, Default, Clone, PartialEq)]
#[reflect(Component, Default, Debug, Clone, PartialEq)]
pub struct NotShadowCaster;
/// Add this component to make a [`Mesh3d`] not receive shadows.
///
/// **Note:** If you're using diffuse transmission, setting [`NotShadowReceiver`] will
/// cause both “regular” shadows as well as diffusely transmitted shadows to be disabled,
/// even when [`TransmittedShadowReceiver`] is being used.
#[derive(Debug, Component, Reflect, Default, Clone)]
#[reflect(Component, Default, Debug)]
pub struct NotShadowReceiver;
/// Add this component to make a [`Mesh3d`] using a PBR material with `StandardMaterial::diffuse_transmission > 0.0`
/// receive shadows on its diffuse transmission lobe. (i.e. its “backside”)
///
/// Not enabled by default, as it requires carefully setting up `StandardMaterial::thickness`
/// (and potentially even baking a thickness texture!) to match the geometry of the mesh, in order to avoid self-shadow artifacts.
///
/// **Note:** Using [`NotShadowReceiver`] overrides this component.
#[derive(Debug, Component, Reflect, Default, Clone)]
#[reflect(Component, Default, Debug)]
pub struct TransmittedShadowReceiver;

/// Add this component to a [`Camera3d`]
/// to control how to anti-alias shadow edges.
///
/// The different modes use different approaches to
/// [Percentage Closer Filtering](https://developer.nvidia.com/gpugems/gpugems/part-ii-lighting-and-shadows/chapter-11-shadow-map-antialiasing).
#[derive(Debug, Component, Reflect, Clone, Copy, PartialEq, Eq, Default)]
#[reflect(Component, Default, Debug, PartialEq, Clone)]
pub enum ShadowFilteringMethod {
    /// Hardware 2x2.
    ///
    /// Fast but poor quality.
    Hardware2x2,
    /// Approximates a fixed Gaussian blur, good when TAA isn't in use.
    ///
    /// Good quality, good performance.
    ///
    /// For directional and spot lights, this uses a [method by Ignacio Castaño
    /// for *The Witness*] using 9 samples and smart filtering to achieve the same
    /// as a regular 5x5 filter kernel.
    ///
    /// [method by Ignacio Castaño for *The Witness*]: https://web.archive.org/web/20230210095515/http://the-witness.net/news/2013/09/shadow-mapping-summary-part-1/
    #[default]
    Gaussian,
    /// A randomized filter that varies over time, good when TAA is in use.
    ///
    /// Good quality when used with `TemporalAntiAliasing`
    /// and good performance.
    ///
    /// For directional and spot lights, this uses a [method by Jorge Jimenez for
    /// *Call of Duty: Advanced Warfare*] using 8 samples in spiral pattern,
    /// randomly-rotated by interleaved gradient noise with spatial variation.
    ///
    /// [method by Jorge Jimenez for *Call of Duty: Advanced Warfare*]: https://www.iryoku.com/next-generation-post-processing-in-call-of-duty-advanced-warfare/
    Temporal,
}

/// System sets used to run light-related systems.
#[derive(Debug, Hash, PartialEq, Eq, Clone, SystemSet)]
pub enum SimulationLightSystems {
    /// The set that adds AABBs and bounding spheres to clustered objects.
    UpdateBounds,
    /// After this set, all lights have been clustered.
    AssignLightsToClusters,
    /// After this set, all directional light cascades are up to date.
    UpdateDirectionalLightCascades,
    /// After this set, the frusta of shadow-casting point lights, spot lights, and directional lights are up to date.
    UpdateLightFrusta,
    /// System order ambiguities between systems in this set are ignored:
    /// the order of systems within this set is irrelevant, as the various visibility-checking systems
    /// assumes that their operations are irreversible during the frame.
    CheckLightVisibility,
}

/// Updates the visibility for [`DirectionalLight`]s so that shadow map
/// rendering can work.
///
/// This only processes entities without [`NoCpuCulling`]. Entities with
/// [`NoCpuCulling`] receive no view-specific processing in the main world.
pub fn check_dir_light_mesh_visibility(
    mut commands: Commands,
    mut directional_lights: Query<
        (
            &DirectionalLight,
            &CascadesFrusta,
            &mut CascadesVisibleEntities,
            Option<&RenderLayers>,
            &ViewVisibility,
        ),
        Without<SpotLight>,
    >,
    visible_entity_query: Query<
        (
            Entity,
            &InheritedVisibility,
            Option<&RenderLayers>,
            Option<&Aabb>,
            Option<&GlobalTransform>,
            Has<VisibilityRange>,
            Has<NoFrustumCulling>,
        ),
        (
            Without<NotShadowCaster>,
            Without<DirectionalLight>,
            Without<NoCpuCulling>,
            With<Mesh3d>,
        ),
    >,
    visible_entity_ranges: Option<Res<VisibleEntityRanges>>,
    mut defer_visible_entities_queue: Local<Parallel<Vec<Entity>>>,
    mut view_visible_entities_queue: Local<Parallel<Vec<Vec<Entity>>>>,
) {
    let visible_entity_ranges = visible_entity_ranges.as_deref();

    for (directional_light, frusta, mut visible_entities, maybe_view_mask, light_view_visibility) in
        &mut directional_lights
    {
        let mut views_to_remove = Vec::new();
        for (view, cascade_view_entities) in &mut visible_entities.entities {
            match frusta.frusta.get(view) {
                Some(view_frusta) => {
                    cascade_view_entities.resize(view_frusta.len(), Default::default());
                }
                None => views_to_remove.push(*view),
            };
        }
        for (view, frusta) in &frusta.frusta {
            visible_entities
                .entities
                .entry(*view)
                .or_insert_with(|| vec![VisibleMeshEntities::default(); frusta.len()]);
        }

        for v in views_to_remove {
            visible_entities.entities.remove(&v);
        }

        // NOTE: If shadow mapping is disabled for the light then it must have no visible entities
        if !directional_light.shadow_maps_enabled || !light_view_visibility.get() {
            visible_entities.entities.clear();
            continue;
        }

        let view_mask = maybe_view_mask.unwrap_or_default();

        for (view, view_frusta) in &frusta.frusta {
            visible_entity_query.par_iter().for_each_init(
                || {
                    let mut entities = view_visible_entities_queue.borrow_local_mut();
                    entities.resize(view_frusta.len(), Vec::default());
                    (defer_visible_entities_queue.borrow_local_mut(), entities)
                },
                |(defer_visible_entities_local_queue, view_visible_entities_local_queue),
                 (
                    entity,
                    inherited_visibility,
                    maybe_entity_mask,
                    maybe_aabb,
                    maybe_transform,
                    has_visibility_range,
                    has_no_frustum_culling,
                )| {
                    if !inherited_visibility.get() {
                        return;
                    }

                    let entity_mask = maybe_entity_mask.unwrap_or_default();
                    if !view_mask.intersects(entity_mask) {
                        return;
                    }

                    // Check visibility ranges.
                    if has_visibility_range
                        && visible_entity_ranges.is_some_and(|visible_entity_ranges| {
                            !visible_entity_ranges.entity_is_in_range_of_view(entity, *view)
                        })
                    {
                        return;
                    }

                    if let (Some(aabb), Some(transform)) = (maybe_aabb, maybe_transform) {
                        let mut visible = false;
                        for (frustum, frustum_visible_entities) in view_frusta
                            .iter()
                            .zip(view_visible_entities_local_queue.iter_mut())
                        {
                            // Disable near-plane culling, as a shadow caster could lie before the near plane.
                            if !has_no_frustum_culling
                                && !frustum.intersects_obb(aabb, &transform.affine(), false, true)
                            {
                                continue;
                            }
                            visible = true;

                            frustum_visible_entities.push(entity);
                        }
                        if visible {
                            defer_visible_entities_local_queue.push(entity);
                        }
                    } else {
                        defer_visible_entities_local_queue.push(entity);
                        for frustum_visible_entities in view_visible_entities_local_queue.iter_mut()
                        {
                            frustum_visible_entities.push(entity);
                        }
                    }
                },
            );
            // collect entities from parallel queue
            for (view_dest_index, view_dest) in visible_entities
                .entities
                .get_mut(view)
                .unwrap()
                .iter_mut()
                .enumerate()
            {
                view_dest.entities.clear();
                for thread_entity_queue in view_visible_entities_queue.iter_mut() {
                    view_dest
                        .entities
                        .append(&mut thread_entity_queue[view_dest_index]);
                }
                view_dest.shrink();
                view_dest.entities.sort_unstable();
            }
        }
    }

    // Defer marking view visibility so this system can run in parallel with check_point_light_mesh_visibility
    // TODO: use resource to avoid unnecessary memory alloc
    let mut defer_queue = mem::take(defer_visible_entities_queue.deref_mut());
    commands.queue(move |world: &mut World| {
        let mut query = world.query::<&mut ViewVisibility>();
        for entities in defer_queue.iter_mut() {
            let mut iter = query.iter_many_mut(world, entities.iter());
            while let Some(mut view_visibility) = iter.fetch_next() {
                view_visibility.set_visible();
            }
        }
    });
}

/// Updates the visibility for [`PointLight`]s and [`SpotLight`]s so that shadow
/// map rendering can work.
///
/// This only processes entities without [`NoCpuCulling`]. Entities with
/// [`NoCpuCulling`] receive no view-specific processing in the main world.
pub fn check_point_light_mesh_visibility(
    visible_point_lights: Query<&VisibleEntities>,
    mut point_lights: Query<(
        &PointLight,
        &GlobalTransform,
        &CubemapFrusta,
        &mut CubemapVisibleEntities,
        Option<&RenderLayers>,
    )>,
    mut spot_lights: Query<(
        &SpotLight,
        &GlobalTransform,
        &Frustum,
        &mut VisibleMeshEntities,
        Option<&RenderLayers>,
    )>,
    mut visible_entity_query: Query<
        (
            Entity,
            &InheritedVisibility,
            &mut ViewVisibility,
            Option<&RenderLayers>,
            Option<&Aabb>,
            Option<&GlobalTransform>,
            Has<VisibilityRange>,
            Has<NoFrustumCulling>,
        ),
        (
            Without<NotShadowCaster>,
            Without<DirectionalLight>,
            Without<NoCpuCulling>,
            With<Mesh3d>,
        ),
    >,
    mut camera_query: Query<(Entity, &RenderTarget), With<Camera>>,
    mut shadow_lod_origin_query: Query<Entity, With<ShadowLodOrigin>>,
    mut point_and_spot_light_query: Query<Entity, Or<(With<PointLight>, With<SpotLight>)>>,
    visible_entity_ranges: Option<Res<VisibleEntityRanges>>,
    mut cubemap_visible_entities_queue: Local<Parallel<[Vec<Entity>; 6]>>,
    mut spot_visible_entities_queue: Local<Parallel<Vec<Entity>>>,
    mut checked_lights: Local<EntityHashSet>,
) {
    checked_lights.clear();

    let shadow_lod_origin = get_shadow_lod_origin(
        camera_query.transmute_lens_filtered(),
        shadow_lod_origin_query.transmute_lens_filtered(),
        point_and_spot_light_query.transmute_lens_filtered(),
    );

    let visible_entity_ranges = visible_entity_ranges.as_deref();
    for visible_lights in &visible_point_lights {
        for &light_entity in visible_lights.get(TypeId::of::<ClusterVisibilityClass>()) {
            if !checked_lights.insert(light_entity) {
                continue;
            }

            // Point lights
            if let Ok((
                point_light,
                transform,
                cubemap_frusta,
                mut cubemap_visible_entities,
                maybe_view_mask,
            )) = point_lights.get_mut(light_entity)
            {
                // NOTE: If shadow mapping is disabled for the light then it must have no visible entities
                if !point_light.shadow_maps_enabled {
                    continue;
                }

                let view_mask = maybe_view_mask.unwrap_or_default();
                let light_sphere = Sphere {
                    center: Vec3A::from(transform.translation()),
                    radius: point_light.range,
                };

                visible_entity_query.par_iter_mut().for_each_init(
                    || cubemap_visible_entities_queue.borrow_local_mut(),
                    |cubemap_visible_entities_local_queue,
                     (
                        entity,
                        inherited_visibility,
                        mut view_visibility,
                        maybe_entity_mask,
                        maybe_aabb,
                        maybe_transform,
                        has_visibility_range,
                        has_no_frustum_culling,
                    )| {
                        if !inherited_visibility.get() {
                            return;
                        }
                        let entity_mask = maybe_entity_mask.unwrap_or_default();
                        if !view_mask.intersects(entity_mask) {
                            return;
                        }
                        if has_visibility_range
                            && visible_entity_ranges.is_some_and(|visible_entity_ranges| {
                                shadow_lod_origin.is_none_or(|shadow_lod_origin| {
                                    !visible_entity_ranges
                                        .entity_is_in_range_of_view(entity, shadow_lod_origin)
                                })
                            })
                        {
                            return;
                        }

                        // If we have an aabb and transform, do frustum culling
                        if let (Some(aabb), Some(transform)) = (maybe_aabb, maybe_transform) {
                            let model_to_world = transform.affine();
                            // Do a cheap sphere vs obb test to prune out most meshes outside the sphere of the light
                            if !has_no_frustum_culling
                                && !light_sphere.intersects_obb(aabb, &model_to_world)
                            {
                                return;
                            }

                            for (frustum, visible_entities) in cubemap_frusta
                                .iter()
                                .zip(cubemap_visible_entities_local_queue.iter_mut())
                            {
                                if has_no_frustum_culling
                                    || frustum.intersects_obb(aabb, &model_to_world, true, true)
                                {
                                    view_visibility.set_visible();
                                    visible_entities.push(entity);
                                }
                            }
                        } else {
                            view_visibility.set_visible();
                            for visible_entities in cubemap_visible_entities_local_queue.iter_mut()
                            {
                                visible_entities.push(entity);
                            }
                        }
                    },
                );

                // Collect the entities from each parallel queue.
                for (view_dest_index, view_dest) in cubemap_visible_entities.iter_mut().enumerate()
                {
                    view_dest.entities.clear();
                    for thread_entity_queue in cubemap_visible_entities_queue.iter_mut() {
                        view_dest
                            .entities
                            .append(&mut thread_entity_queue[view_dest_index]);
                    }
                    view_dest.shrink();
                    view_dest.entities.sort_unstable();
                }
            }

            // Spot lights
            if let Ok((point_light, transform, frustum, mut visible_entities, maybe_view_mask)) =
                spot_lights.get_mut(light_entity)
            {
                // NOTE: If shadow mapping is disabled for the light then it must have no visible entities
                if !point_light.shadow_maps_enabled {
                    continue;
                }

                let view_mask = maybe_view_mask.unwrap_or_default();
                let light_sphere = Sphere {
                    center: Vec3A::from(transform.translation()),
                    radius: point_light.range,
                };

                visible_entity_query.par_iter_mut().for_each_init(
                    || spot_visible_entities_queue.borrow_local_mut(),
                    |spot_visible_entities_local_queue,
                     (
                        entity,
                        inherited_visibility,
                        mut view_visibility,
                        maybe_entity_mask,
                        maybe_aabb,
                        maybe_transform,
                        has_visibility_range,
                        has_no_frustum_culling,
                    )| {
                        if !inherited_visibility.get() {
                            return;
                        }

                        let entity_mask = maybe_entity_mask.unwrap_or_default();
                        if !view_mask.intersects(entity_mask) {
                            return;
                        }
                        // Check visibility ranges.
                        if has_visibility_range
                            && visible_entity_ranges.is_some_and(|visible_entity_ranges| {
                                shadow_lod_origin.is_none_or(|shadow_lod_origin| {
                                    !visible_entity_ranges
                                        .entity_is_in_range_of_view(entity, shadow_lod_origin)
                                })
                            })
                        {
                            return;
                        }

                        if let (Some(aabb), Some(transform)) = (maybe_aabb, maybe_transform) {
                            let model_to_world = transform.affine();
                            // Do a cheap sphere vs obb test to prune out most meshes outside the sphere of the light
                            if !has_no_frustum_culling
                                && !light_sphere.intersects_obb(aabb, &model_to_world)
                            {
                                return;
                            }

                            if has_no_frustum_culling
                                || frustum.intersects_obb(aabb, &model_to_world, true, true)
                            {
                                view_visibility.set_visible();
                                spot_visible_entities_local_queue.push(entity);
                            }
                        } else {
                            view_visibility.set_visible();
                            spot_visible_entities_local_queue.push(entity);
                        }
                    },
                );

                visible_entities.entities.clear();
                for thread_entity_queue in spot_visible_entities_queue.iter_mut() {
                    visible_entities.entities.append(thread_entity_queue);
                }
                visible_entities.shrink();
                visible_entities.entities.sort_unstable();
            }
        }
    }
}

/// Determines the LOD origin for spot and point light shadow maps.
///
/// The selection priority is, from highest to lowest:
///
/// 1. An entity explicitly marked with the [`ShadowLodOrigin`] component.
///
/// 2. A camera that renders to a window.
///
/// 3. Any camera.
pub fn get_shadow_lod_origin(
    mut camera_query: QueryLens<(Entity, &RenderTarget), With<Camera>>,
    mut shadow_lod_origin_query: QueryLens<Entity, With<ShadowLodOrigin>>,
    mut lights_query: QueryLens<Entity, Or<(With<PointLight>, With<SpotLight>)>>,
) -> Option<Entity> {
    let (camera_query, shadow_lod_origin_query) =
        (camera_query.query(), shadow_lod_origin_query.query());

    let mut entities: SmallVec<[Entity; 4]> = smallvec![];
    entities.extend(shadow_lod_origin_query.iter());
    if let Some(lod_origin) = entities.iter().min() {
        return Some(*lod_origin);
    }

    entities.extend(
        camera_query
            .iter()
            .filter_map(|(main_entity, render_target)| match *render_target {
                RenderTarget::Window(_) => Some(main_entity),
                _ => None,
            }),
    );
    if let Some(lod_origin) = entities.iter().min() {
        return Some(*lod_origin);
    };

    entities.extend(camera_query.iter().map(|(main_entity, _)| main_entity));
    if let Some(lod_origin) = entities.iter().min() {
        if !lights_query.query().is_empty() {
            warn_once!(
                "Point lights and/or spot lights are present, but no entity has \
                 `ShadowLodOrigin`, and no camera that renders to the window has been found. \
                 Consider using the `ShadowLodOrigin` component to set a LOD origin."
            );
        }

        return Some(*lod_origin);
    };

    None
}