/
mod.rs
220 lines (183 loc) · 4.91 KB
/
mod.rs
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use bevy::{
prelude::*,
asset::LoadState,
ecs::system::{
lifetimeless::SRes,
SystemParamItem,
},
reflect::TypeUuid,
render::{
render_asset::{
RenderAsset,
RenderAssetPlugin,
PrepareAssetError,
},
render_resource::*,
renderer::RenderDevice,
},
};
use bytemuck::{
Pod,
Zeroable,
};
use static_assertions::assert_cfg;
use crate::{
GaussianCloud,
GaussianCloudSettings,
};
#[cfg(feature = "sort_radix")]
pub mod radix;
#[cfg(feature = "sort_rayon")]
pub mod rayon;
assert_cfg!(
any(
feature = "sort_radix",
feature = "sort_rayon",
),
"no sort mode enabled",
);
#[derive(
Component,
Debug,
Clone,
PartialEq,
Reflect,
)]
pub enum SortMode {
None,
#[cfg(feature = "sort_radix")]
Radix,
#[cfg(feature = "sort_rayon")]
Rayon,
}
impl Default for SortMode {
#[allow(unreachable_code)]
fn default() -> Self {
#[cfg(feature = "sort_rayon")]
return Self::Rayon;
#[cfg(feature = "sort_radix")]
return Self::Radix;
Self::None
}
}
#[derive(Default)]
pub struct SortPlugin;
impl Plugin for SortPlugin {
fn build(&self, app: &mut App) {
#[cfg(feature = "sort_radix")]
app.add_plugins(radix::RadixSortPlugin);
#[cfg(feature = "sort_rayon")]
app.add_plugins(rayon::RayonSortPlugin);
app.register_type::<SortedEntries>();
app.init_asset::<SortedEntries>();
app.register_asset_reflect::<SortedEntries>();
app.add_plugins(RenderAssetPlugin::<SortedEntries>::default());
app.add_systems(Update, auto_insert_sorted_entries);
}
}
fn auto_insert_sorted_entries(
mut commands: Commands,
asset_server: Res<AssetServer>,
gaussian_clouds_res: Res<Assets<GaussianCloud>>,
mut sorted_entries_res: ResMut<Assets<SortedEntries>>,
gaussian_clouds: Query<(
Entity,
&Handle<GaussianCloud>,
&GaussianCloudSettings,
Without<Handle<SortedEntries>>,
)>,
) {
for (
entity,
gaussian_cloud_handle,
_settings,
_,
) in gaussian_clouds.iter() {
// // TODO: specialize vertex shader for sort mode (e.g. draw_indirect but no sort indirection)
// if settings.sort_mode == SortMode::None {
// continue;
// }
if Some(LoadState::Loading) == asset_server.get_load_state(gaussian_cloud_handle) {
continue;
}
let cloud = gaussian_clouds_res.get(gaussian_cloud_handle);
if cloud.is_none() {
continue;
}
let cloud = cloud.unwrap();
// TODO: move gaussian_cloud and sorted_entry assets into an asset bundle
let sorted_entries = sorted_entries_res.add(SortedEntries {
sorted: (0..cloud.gaussians.len())
.map(|idx| {
SortEntry {
key: 1,
index: idx as u32,
}
})
.collect(),
});
commands.entity(entity)
.insert(sorted_entries);
}
}
#[derive(
Clone,
Copy,
Debug,
Default,
PartialEq,
Reflect,
ShaderType,
Pod,
Zeroable,
)]
#[repr(C)]
pub struct SortEntry {
pub key: u32,
pub index: u32,
}
// TODO: add RenderAssetPlugin for SortedEntries & auto-insert to GaussianCloudBundles if their sort mode is not None
// supports pre-sorting or CPU sorting in main world, initializes the sorting_entry_buffer
#[derive(
Clone,
Asset,
Debug,
Default,
PartialEq,
Reflect,
TypeUuid,
)]
#[uuid = "ac2f08eb-fa13-ccdd-ea11-51571ea332d5"]
pub struct SortedEntries {
pub sorted: Vec<SortEntry>,
}
impl RenderAsset for SortedEntries {
type ExtractedAsset = SortedEntries;
type PreparedAsset = GpuSortedEntry;
type Param = SRes<RenderDevice>;
fn extract_asset(&self) -> Self::ExtractedAsset {
self.clone()
}
fn prepare_asset(
sorted_entries: Self::ExtractedAsset,
render_device: &mut SystemParamItem<Self::Param>,
) -> Result<Self::PreparedAsset, PrepareAssetError<Self::ExtractedAsset>> {
let sorted_entry_buffer = render_device.create_buffer_with_data(&BufferInitDescriptor {
label: Some("sorted_entry_buffer"),
contents: bytemuck::cast_slice(sorted_entries.sorted.as_slice()),
usage: BufferUsages::COPY_SRC | BufferUsages::COPY_DST | BufferUsages::STORAGE,
});
let count = sorted_entries.sorted.len();
Ok(GpuSortedEntry {
sorted_entry_buffer,
count,
})
}
}
// TODO: support instancing and multiple cameras
// separate entry_buffer_a binding into unique a bind group to optimize buffer updates
#[derive(Debug, Clone)]
pub struct GpuSortedEntry {
pub sorted_entry_buffer: Buffer,
pub count: usize,
}