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Refactor check_light_mesh_visibility for performance #1 #13905

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merged 5 commits into from
Jun 18, 2024
Merged

Refactor check_light_mesh_visibility for performance #1 #13905

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1a973b4
init
re0312 Jun 15, 2024
615497b
Merge branch 'main' of https://github.com/re0312/bevy
re0312 Jun 18, 2024
d9bb9fa
split
re0312 Jun 18, 2024
6ce8c81
opt
re0312 Jun 18, 2024
5d6c74c
Revert "opt"
re0312 Jun 18, 2024
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5 changes: 4 additions & 1 deletion crates/bevy_pbr/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -368,7 +368,10 @@ impl Plugin for PbrPlugin {
.after(TransformSystem::TransformPropagate)
.after(SimulationLightSystems::AssignLightsToClusters),
check_visibility::<WithLight>.in_set(VisibilitySystems::CheckVisibility),
check_light_mesh_visibility
(
check_dir_light_mesh_visibility,
check_point_light_mesh_visibility,
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Do these systems need to be ordered relative to each other?

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It should not be necessary. The main reason for splitting the system is that in subsequent PRs, we hope they can be automatically parallelized by the bevy's scheduler.

)
.in_set(SimulationLightSystems::CheckLightVisibility)
.after(VisibilitySystems::CalculateBounds)
.after(TransformSystem::TransformPropagate)
Expand Down
86 changes: 54 additions & 32 deletions crates/bevy_pbr/src/light/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -638,22 +638,23 @@ pub fn update_spot_light_frusta(
}
}

pub fn check_light_mesh_visibility(
visible_point_lights: Query<&VisibleClusterableObjects>,
mut point_lights: Query<(
&PointLight,
&GlobalTransform,
&CubemapFrusta,
&mut CubemapVisibleEntities,
Option<&RenderLayers>,
)>,
mut spot_lights: Query<(
&SpotLight,
&GlobalTransform,
&Frustum,
&mut VisibleEntities,
Option<&RenderLayers>,
)>,
fn shrink_entities(visible_entities: &mut Vec<Entity>) {
// Check that visible entities capacity() is no more than two times greater than len()
let capacity = visible_entities.capacity();
let reserved = capacity
.checked_div(visible_entities.len())
.map_or(0, |reserve| {
if reserve > 2 {
capacity / (reserve / 2)
} else {
capacity
}
});

visible_entities.shrink_to(reserved);
}

pub fn check_dir_light_mesh_visibility(
mut directional_lights: Query<
(
&DirectionalLight,
Expand Down Expand Up @@ -682,22 +683,6 @@ pub fn check_light_mesh_visibility(
>,
visible_entity_ranges: Option<Res<VisibleEntityRanges>>,
) {
fn shrink_entities(visible_entities: &mut Vec<Entity>) {
// Check that visible entities capacity() is no more than two times greater than len()
let capacity = visible_entities.capacity();
let reserved = capacity
.checked_div(visible_entities.len())
.map_or(0, |reserve| {
if reserve > 2 {
capacity / (reserve / 2)
} else {
capacity
}
});

visible_entities.shrink_to(reserved);
}

let visible_entity_ranges = visible_entity_ranges.as_deref();

// Directional lights
Expand Down Expand Up @@ -804,6 +789,43 @@ pub fn check_light_mesh_visibility(
.for_each(shrink_entities);
}
}
}

pub fn check_point_light_mesh_visibility(
visible_point_lights: Query<&VisibleClusterableObjects>,
mut point_lights: Query<(
&PointLight,
&GlobalTransform,
&CubemapFrusta,
&mut CubemapVisibleEntities,
Option<&RenderLayers>,
)>,
mut spot_lights: Query<(
&SpotLight,
&GlobalTransform,
&Frustum,
&mut VisibleEntities,
Option<&RenderLayers>,
)>,
mut visible_entity_query: Query<
(
Entity,
&InheritedVisibility,
&mut ViewVisibility,
Option<&RenderLayers>,
Option<&Aabb>,
Option<&GlobalTransform>,
Has<VisibilityRange>,
),
(
Without<NotShadowCaster>,
Without<DirectionalLight>,
With<Handle<Mesh>>,
),
>,
visible_entity_ranges: Option<Res<VisibleEntityRanges>>,
) {
let visible_entity_ranges = visible_entity_ranges.as_deref();

for visible_lights in &visible_point_lights {
for light_entity in visible_lights.entities.iter().copied() {
Expand Down