Mirrored_Repos/veloren
1
0
Fork 0
mirror of https://gitlab.com/veloren/veloren.git synced 2024-08-30 18:12:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Parallelize spatial grid construction.

Browse Source 
This solution may or may not actually work well.  An incremental
solution may be better.
This commit is contained in:
Joshua Yanovski 2022-09-22 17:18:13 -07:00
parent 46cd112928
commit cc6d904c75
5 changed files with 242 additions and 187 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
common/Cargo.toml
View File

@ -71,6 +71,7 @@ petgraph = { version = "0.6", optional = true }
kiddo = { version = "0.1", optional = true } kiddo = { version = "0.1", optional = true }
# Data structures # Data structures
dashmap = { version = "5.4.0", features = ["rayon"] }
hashbrown = { version = "0.12", features = ["rayon", "serde", "nightly"] } hashbrown = { version = "0.12", features = ["rayon", "serde", "nightly"] }
slotmap = { version = "1.0", features = ["serde"] } slotmap = { version = "1.0", features = ["serde"] }
indexmap = { version = "1.3.0", features = ["rayon"] } indexmap = { version = "1.3.0", features = ["rayon"] }

6
common/src/cached_spatial_grid.rs
View File

@ -1,4 +1,4 @@
use crate::util::SpatialGrid; use crate::util::{SpatialGrid, SpatialGridRef};
/// Cached [`SpatialGrid`] for reuse within different ecs systems during a tick. /// Cached [`SpatialGrid`] for reuse within different ecs systems during a tick.
/// This is used to accelerate queries on entities within a specific area. /// This is used to accelerate queries on entities within a specific area.
@ -6,7 +6,7 @@ use crate::util::SpatialGrid;
/// positions are calculated for the tick. So any position modifications outside /// positions are calculated for the tick. So any position modifications outside
/// the physics system will not be reflected here until the next tick when the /// the physics system will not be reflected here until the next tick when the
/// physics system runs. /// physics system runs.
pub struct CachedSpatialGrid(pub SpatialGrid); pub struct CachedSpatialGrid(pub SpatialGridRef);
impl Default for CachedSpatialGrid { impl Default for CachedSpatialGrid {
fn default() -> Self { fn default() -> Self {
@ -14,7 +14,7 @@ impl Default for CachedSpatialGrid {
let lg2_large_cell_size = 6; // 64 let lg2_large_cell_size = 6; // 64
let radius_cutoff = 8; let radius_cutoff = 8;
let spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff); let spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff).into_read_only();
Self(spatial_grid) Self(spatial_grid)
} }

2
common/src/util/mod.rs
View File

@ -38,4 +38,4 @@ pub use dir::*;
pub use option::either_with; pub use option::either_with;
pub use plane::Plane; pub use plane::Plane;
pub use projection::Projection; pub use projection::Projection;
pub use spatial_grid::SpatialGrid; pub use spatial_grid::{SpatialGrid, SpatialGridRef};

91
common/src/util/spatial_grid.rs
View File

@ -1,29 +1,36 @@
use core::sync::atomic::{AtomicU32, Ordering};
use vek::*; use vek::*;
pub type MapMut = dashmap::DashMap<Vec2<i32>, Vec<specs::Entity>>;
pub type MapRef = dashmap::ReadOnlyView<Vec2<i32>, Vec<specs::Entity>>;
#[derive(Debug)] #[derive(Debug)]
pub struct SpatialGrid { pub struct SpatialGridInner<Map, Radius> {
// Uses two scales of grids so that we can have a hard limit on how far to search in the /// Uses two scales of grids so that we can have a hard limit on how far to search in the
// smaller grid /// smaller grid
grid: hashbrown::HashMap<Vec2<i32>, Vec<specs::Entity>>, grid: Map,
large_grid: hashbrown::HashMap<Vec2<i32>, Vec<specs::Entity>>, large_grid: Map,
// Log base 2 of the cell size of the spatial grid /// Log base 2 of the cell size of the spatial grid
lg2_cell_size: usize, lg2_cell_size: usize,
// Log base 2 of the cell size of the large spatial grid /// Log base 2 of the cell size of the large spatial grid
lg2_large_cell_size: usize, lg2_large_cell_size: usize,
// Entities with a radius over this value are store in the coarser large_grid /// Entities with a radius over this value are store in the coarser large_grid
// This is the amount of buffer space we need to add when finding the intersections with cells /// This is the amount of buffer space we need to add when finding the intersections with cells
// in the regular grid /// in the regular grid
radius_cutoff: u32, radius_cutoff: u32,
// Stores the largest radius of the entities in the large_grid /// Stores the largest radius of the entities in the large_grid
// This is the amount of buffer space we need to add when finding the intersections with cells /// This is the amount of buffer space we need to add when finding the intersections with cells
// in the larger grid /// in the larger grid
// note: could explore some distance field type thing for querying whether there are large /// note: could explore some distance field type thing for querying whether there are large
// entities nearby that necessitate expanding the cells searched for collision (and querying /// entities nearby that necessitate expanding the cells searched for collision (and querying
// how much it needs to be expanded) /// how much it needs to be expanded)
// TODO: log this to metrics? /// TODO: log this to metrics?
largest_large_radius: u32, largest_large_radius: Radius,
} }
pub type SpatialGrid = SpatialGridInner<MapMut, AtomicU32>;
pub type SpatialGridRef = SpatialGridInner<MapRef, u32>;
impl SpatialGrid { impl SpatialGrid {
pub fn new(lg2_cell_size: usize, lg2_large_cell_size: usize, radius_cutoff: u32) -> Self { pub fn new(lg2_cell_size: usize, lg2_large_cell_size: usize, radius_cutoff: u32) -> Self {
Self { Self {
@ -32,28 +39,55 @@ impl SpatialGrid {
lg2_cell_size, lg2_cell_size,
lg2_large_cell_size, lg2_large_cell_size,
radius_cutoff, radius_cutoff,
largest_large_radius: radius_cutoff, largest_large_radius: radius_cutoff.into(),
} }
} }
/// Add an entity at the provided 2d pos into the spatial grid /// Add an entity at the provided 2d pos into the spatial grid
pub fn insert(&mut self, pos: Vec2<i32>, radius: u32, entity: specs::Entity) { pub fn insert(&self, pos: Vec2<i32>, radius: u32, entity: specs::Entity) {
if radius <= self.radius_cutoff { if radius <= self.radius_cutoff {
let cell = pos.map(|e| e >> self.lg2_cell_size); let cell = pos.map(|e| e >> self.lg2_cell_size);
self.grid.entry(cell).or_default().push(entity); self.grid.entry(cell).or_default().push(entity);
} else { } else {
let cell = pos.map(|e| e >> self.lg2_large_cell_size); let cell = pos.map(|e| e >> self.lg2_large_cell_size);
self.large_grid.entry(cell).or_default().push(entity); self.large_grid.entry(cell).or_default().push(entity);
self.largest_large_radius = self.largest_large_radius.max(radius); // NOTE: Relaxed ordering is sufficient, because max is a monotonic function (for the
// duration of shared write access to the map; clear takes &mut so it's okay that it's
// not monotonic). We don't need to order this operation with anything else, either,
// because all interesting map operations require unique access to Self to perform,
// which axiomatically synchronizes with the end of all prior shared borrows.
//
// TODO: Verify that intrinsics lower intelligently to a priority update on CPUs (since
// the intrinsic seems targeted at GPUs).
self.largest_large_radius.fetch_max(radius, Ordering::Relaxed);
} }
} }
pub fn into_read_only(self) -> SpatialGridRef {
SpatialGridInner {
grid: self.grid.into_read_only(),
large_grid: self.large_grid.into_read_only(),
lg2_cell_size: self.lg2_cell_size,
lg2_large_cell_size: self.lg2_large_cell_size,
radius_cutoff: self.radius_cutoff,
largest_large_radius: self.largest_large_radius.into_inner(),
}
}
pub fn clear(&mut self) {
self.grid.clear();
self.large_grid.clear();
self.largest_large_radius = self.radius_cutoff.into();
}
}
impl SpatialGridRef {
/// Get an iterator over the entities overlapping the provided axis aligned /// Get an iterator over the entities overlapping the provided axis aligned
/// bounding region. /// bounding region.
/// NOTE: for best optimization of the iterator use /// NOTE: for best optimization of the iterator use
/// `for_each` rather than a for loop. /// `for_each` rather than a for loop.
pub fn in_aabr<'a>(&'a self, aabr: Aabr<i32>) -> impl Iterator<Item = specs::Entity> + 'a { pub fn in_aabr<'a>(&'a self, aabr: Aabr<i32>) -> impl Iterator<Item = specs::Entity> + 'a {
let iter = |max_entity_radius, grid: &'a hashbrown::HashMap<_, _>, lg2_cell_size| { let iter = |max_entity_radius, grid: &'a MapRef, lg2_cell_size| {
// Add buffer for other entity radius // Add buffer for other entity radius
let min = aabr.min - max_entity_radius as i32; let min = aabr.min - max_entity_radius as i32;
let max = aabr.max + max_entity_radius as i32; let max = aabr.max + max_entity_radius as i32;
@ -100,9 +134,14 @@ impl SpatialGrid {
self.in_aabr(aabr) self.in_aabr(aabr)
} }
pub fn clear(&mut self) { pub fn into_inner(self) -> SpatialGrid {
self.grid.clear(); SpatialGridInner {
self.large_grid.clear(); grid: self.grid.into_inner(),
self.largest_large_radius = self.radius_cutoff; large_grid: self.large_grid.into_inner(),
lg2_cell_size: self.lg2_cell_size,
lg2_large_cell_size: self.lg2_large_cell_size,
radius_cutoff: self.radius_cutoff,
largest_large_radius: self.largest_large_radius.into(),
}
} }
} }

119
common/systems/src/phys.rs
View File

@ -15,7 +15,7 @@ use common::{
states, states,
terrain::{Block, BlockKind, TerrainGrid}, terrain::{Block, BlockKind, TerrainGrid},
uid::Uid, uid::Uid,
util::{Projection, SpatialGrid}, util::{Projection, SpatialGrid, SpatialGridRef},
vol::{BaseVol, ReadVol}, vol::{BaseVol, ReadVol},
}; };
use common_base::{prof_span, span}; use common_base::{prof_span, span};
@ -146,37 +146,38 @@ impl<'a> PhysicsData<'a> {
/// Add/reset physics state components /// Add/reset physics state components
fn reset(&mut self) { fn reset(&mut self) {
span!(_guard, "Add/reset physics state components"); span!(_guard, "Add/reset physics state components");
for (entity, _, _, _, _) in ( (
&self.read.entities, &self.read.entities,
&self.read.colliders, self.read.colliders.mask(),
&self.write.positions, self.write.positions.mask(),
&self.write.velocities, self.write.velocities.mask(),
&self.write.orientations, self.write.orientations.mask(),
) )
.join() .join()
{ .for_each(|(entity, _, _, _, _)| {
let _ = self let _ = self
.write .write
.physics_states .physics_states
.entry(entity) .entry(entity)
.map(|e| e.or_insert_with(Default::default)); .map(|e| e.or_insert_with(Default::default));
} });
} }
fn maintain_pushback_cache(&mut self) { fn maintain_pushback_cache(&mut self) {
span!(_guard, "Maintain pushback cache"); span!(_guard, "Maintain pushback cache");
// Add PreviousPhysCache for all relevant entities // Add PreviousPhysCache for all relevant entities
for entity in ( (
&self.read.entities, &self.read.entities,
&self.read.colliders, self.read.colliders.mask(),
&self.write.velocities, self.write.velocities.mask(),
&self.write.positions, self.write.positions.mask(),
!&self.write.previous_phys_cache, !self.write.previous_phys_cache.mask(),
) )
.join() .join()
.map(|(e, _, _, _, _)| e) .map(|(e, _, _, _, _)| e)
.collect::<Vec<_>>() .collect::<Vec<_>>()
{ .into_iter()
.for_each(|entity| {
let _ = self let _ = self
.write .write
.previous_phys_cache .previous_phys_cache
@ -191,11 +192,11 @@ impl<'a> PhysicsData<'a> {
pos: None, pos: None,
ori: Quaternion::identity(), ori: Quaternion::identity(),
}); });
} });
// Update PreviousPhysCache // Update PreviousPhysCache
for (_, vel, position, ori, mut phys_cache, collider, scale, cs) in ( (
&self.read.entities, /* &self.read.entities, */
&self.write.velocities, &self.write.velocities,
&self.write.positions, &self.write.positions,
&self.write.orientations, &self.write.orientations,
@ -204,8 +205,9 @@ impl<'a> PhysicsData<'a> {
self.read.scales.maybe(), self.read.scales.maybe(),
self.read.char_states.maybe(), self.read.char_states.maybe(),
) )
.join() .par_join()
{ .for_each(
|(/* _, */ vel, position, ori, mut phys_cache, collider, scale, cs)| {
let scale = scale.map(|s| s.0).unwrap_or(1.0); let scale = scale.map(|s| s.0).unwrap_or(1.0);
let z_limits = calc_z_limit(cs, collider); let z_limits = calc_z_limit(cs, collider);
let (z_min, z_max) = z_limits; let (z_min, z_max) = z_limits;
@ -220,13 +222,16 @@ impl<'a> PhysicsData<'a> {
// Move center to the middle between OLD and OLD+VEL_DT // Move center to the middle between OLD and OLD+VEL_DT
// so that we can reduce the collision_boundary. // so that we can reduce the collision_boundary.
phys_cache.center = entity_center + phys_cache.velocity_dt / 2.0; phys_cache.center = entity_center + phys_cache.velocity_dt / 2.0;
phys_cache.collision_boundary = radius + (phys_cache.velocity_dt / 2.0).magnitude(); phys_cache.collision_boundary =
radius + (phys_cache.velocity_dt / 2.0).magnitude();
phys_cache.scale = scale; phys_cache.scale = scale;
phys_cache.scaled_radius = flat_radius; phys_cache.scaled_radius = flat_radius;
let neighborhood_radius = match collider { let neighborhood_radius = match collider {
Collider::CapsulePrism { radius, .. } => radius * scale, Collider::CapsulePrism { radius, .. } => radius * scale,
Collider::Voxel { .. } | Collider::Volume(_) | Collider::Point => flat_radius, Collider::Voxel { .. } | Collider::Volume(_) | Collider::Point => {
flat_radius
},
}; };
phys_cache.neighborhood_radius = neighborhood_radius; phys_cache.neighborhood_radius = neighborhood_radius;
@ -270,7 +275,8 @@ impl<'a> PhysicsData<'a> {
}; };
phys_cache.origins = origins; phys_cache.origins = origins;
phys_cache.ori = ori; phys_cache.ori = ori;
} },
);
} }
fn construct_spatial_grid(&mut self) -> SpatialGrid { fn construct_spatial_grid(&mut self) -> SpatialGrid {
@ -292,27 +298,28 @@ impl<'a> PhysicsData<'a> {
let lg2_cell_size = 5; let lg2_cell_size = 5;
let lg2_large_cell_size = 6; let lg2_large_cell_size = 6;
let radius_cutoff = 8; let radius_cutoff = 8;
let mut spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff); let spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff);
for (entity, pos, phys_cache, _, _) in ( (
&read.entities, &read.entities,
&write.positions, &write.positions,
&write.previous_phys_cache, &write.previous_phys_cache,
write.velocities.mask(), write.velocities.mask(),
!&read.projectiles, // Not needed because they are skipped in the inner loop below !read.projectiles.mask(), /* Not needed because they are skipped in the inner loop
* below */
) )
.join() .par_join()
{ .for_each(|(entity, pos, phys_cache, _, _)| {
// Note: to not get too fine grained we use a 2D grid for now // Note: to not get too fine grained we use a 2D grid for now
let radius_2d = phys_cache.scaled_radius.ceil() as u32; let radius_2d = phys_cache.scaled_radius.ceil() as u32;
let pos_2d = pos.0.xy().map(|e| e as i32); let pos_2d = pos.0.xy().map(|e| e as i32);
const POS_TRUNCATION_ERROR: u32 = 1; const POS_TRUNCATION_ERROR: u32 = 1;
spatial_grid.insert(pos_2d, radius_2d + POS_TRUNCATION_ERROR, entity); spatial_grid.insert(pos_2d, radius_2d + POS_TRUNCATION_ERROR, entity);
} });
spatial_grid spatial_grid
} }
fn apply_pushback(&mut self, job: &mut Job<Sys>, spatial_grid: &SpatialGrid) { fn apply_pushback(&mut self, job: &mut Job<Sys>, spatial_grid: &SpatialGridRef) {
span!(_guard, "Apply pushback"); span!(_guard, "Apply pushback");
job.cpu_stats.measure(ParMode::Rayon); job.cpu_stats.measure(ParMode::Rayon);
let PhysicsData { let PhysicsData {
@ -529,16 +536,16 @@ impl<'a> PhysicsData<'a> {
let lg2_cell_size = 7; // 128 let lg2_cell_size = 7; // 128
let lg2_large_cell_size = 8; // 256 let lg2_large_cell_size = 8; // 256
let radius_cutoff = 64; let radius_cutoff = 64;
let mut spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff); let spatial_grid = SpatialGrid::new(lg2_cell_size, lg2_large_cell_size, radius_cutoff);
// TODO: give voxel colliders their own component type // TODO: give voxel colliders their own component type
for (entity, pos, collider, ori) in ( (
&read.entities, &read.entities,
&write.positions, &write.positions,
&read.colliders, &read.colliders,
&write.orientations, &write.orientations,
) )
.join() .par_join()
{ .for_each(|(entity, pos, collider, ori)| {
let vol = match collider { let vol = match collider {
Collider::Voxel { id } => voxel_colliders_manifest.colliders.get(id), Collider::Voxel { id } => voxel_colliders_manifest.colliders.get(id),
Collider::Volume(vol) => Some(&**vol), Collider::Volume(vol) => Some(&**vol),
@ -552,7 +559,7 @@ impl<'a> PhysicsData<'a> {
const POS_TRUNCATION_ERROR: u32 = 1; const POS_TRUNCATION_ERROR: u32 = 1;
spatial_grid.insert(pos_2d, radius + POS_TRUNCATION_ERROR, entity); spatial_grid.insert(pos_2d, radius + POS_TRUNCATION_ERROR, entity);
} }
} });
spatial_grid spatial_grid
} }
@ -560,7 +567,7 @@ impl<'a> PhysicsData<'a> {
fn handle_movement_and_terrain( fn handle_movement_and_terrain(
&mut self, &mut self,
job: &mut Job<Sys>, job: &mut Job<Sys>,
voxel_collider_spatial_grid: &SpatialGrid, voxel_collider_spatial_grid: &SpatialGridRef,
) { ) {
let PhysicsData { let PhysicsData {
ref read, ref read,
@ -610,7 +617,7 @@ impl<'a> PhysicsData<'a> {
&write.physics_states, &write.physics_states,
&read.masses, &read.masses,
&read.densities, &read.densities,
!&read.is_ridings, !read.is_ridings.mask(),
) )
.par_join() .par_join()
.for_each_init( .for_each_init(
@ -694,19 +701,19 @@ impl<'a> PhysicsData<'a> {
// Update cached 'old' physics values to the current values ready for the next // Update cached 'old' physics values to the current values ready for the next
// tick // tick
prof_span!(guard, "record ori into phys_cache"); prof_span!(guard, "record ori into phys_cache");
for (pos, ori, previous_phys_cache, _) in ( (
&write.positions, &write.positions,
&write.orientations, &write.orientations,
&mut write.previous_phys_cache, &mut write.previous_phys_cache,
&read.colliders, read.colliders.mask(),
) )
.join() .par_join()
{ .for_each(|(pos, ori, previous_phys_cache, _)| {
// Note: updating ori with the rest of the cache values above was attempted but // Note: updating ori with the rest of the cache values above was attempted but
// it did not work (investigate root cause?) // it did not work (investigate root cause?)
previous_phys_cache.pos = Some(*pos); previous_phys_cache.pos = Some(*pos);
previous_phys_cache.ori = ori.to_quat(); previous_phys_cache.ori = ori.to_quat();
} });
drop(guard); drop(guard);
} }
@ -714,7 +721,7 @@ impl<'a> PhysicsData<'a> {
job: &mut Job<Sys>, job: &mut Job<Sys>,
read: &PhysicsRead, read: &PhysicsRead,
write: &mut PhysicsWrite, write: &mut PhysicsWrite,
voxel_collider_spatial_grid: &SpatialGrid, voxel_collider_spatial_grid: &SpatialGridRef,
terrain_like_entities: bool, terrain_like_entities: bool,
) { ) {
let (positions, velocities, previous_phys_cache, orientations) = ( let (positions, velocities, previous_phys_cache, orientations) = (
@ -1240,17 +1247,17 @@ impl<'a> PhysicsData<'a> {
write.outcomes.emitter().emit_many(outcomes); write.outcomes.emitter().emit_many(outcomes);
prof_span!(guard, "write deferred pos and vel"); prof_span!(guard, "write deferred pos and vel");
for (_, pos, vel, ori, pos_vel_ori_defer, _) in ( (
&read.entities, /* &read.entities, */
&mut write.positions, &mut write.positions,
&mut write.velocities, &mut write.velocities,
&mut write.orientations, &mut write.orientations,
&mut write.pos_vel_ori_defers, &mut write.pos_vel_ori_defers,
&read.colliders, &read.colliders,
) )
.join() .par_join()
.filter(|tuple| tuple.5.is_voxel() == terrain_like_entities) .filter(|tuple| tuple./*5*/4.is_voxel() == terrain_like_entities)
{ .for_each(|(/* _, */ pos, vel, ori, pos_vel_ori_defer, _)| {
if let Some(new_pos) = pos_vel_ori_defer.pos.take() { if let Some(new_pos) = pos_vel_ori_defer.pos.take() {
*pos = new_pos; *pos = new_pos;
} }
@ -1260,7 +1267,7 @@ impl<'a> PhysicsData<'a> {
if let Some(new_ori) = pos_vel_ori_defer.ori.take() { if let Some(new_ori) = pos_vel_ori_defer.ori.take() {
*ori = new_ori; *ori = new_ori;
} }
} });
drop(guard); drop(guard);
let mut event_emitter = read.event_bus.emitter(); let mut event_emitter = read.event_bus.emitter();
@ -1276,7 +1283,11 @@ impl<'a> PhysicsData<'a> {
ref mut write, ref mut write,
} = self; } = self;
let spatial_grid = &mut write.cached_spatial_grid.0; // Borrow checker dance, since transferring away from a read only view requires
// &mut self.
let mut spatial_grid = core::mem::take(&mut *write.cached_spatial_grid)
.0
.into_inner();
spatial_grid.clear(); spatial_grid.clear();
( (
&read.entities, &read.entities,
@ -1284,7 +1295,7 @@ impl<'a> PhysicsData<'a> {
read.scales.maybe(), read.scales.maybe(),
read.colliders.maybe(), read.colliders.maybe(),
) )
.join() .par_join()
.for_each(|(entity, pos, scale, collider)| { .for_each(|(entity, pos, scale, collider)| {
let scale = scale.map(|s| s.0).unwrap_or(1.0); let scale = scale.map(|s| s.0).unwrap_or(1.0);
let radius_2d = let radius_2d =
@ -1293,6 +1304,8 @@ impl<'a> PhysicsData<'a> {
const POS_TRUNCATION_ERROR: u32 = 1; const POS_TRUNCATION_ERROR: u32 = 1;
spatial_grid.insert(pos_2d, radius_2d + POS_TRUNCATION_ERROR, entity); spatial_grid.insert(pos_2d, radius_2d + POS_TRUNCATION_ERROR, entity);
}); });
write.cached_spatial_grid.0 = spatial_grid.into_read_only();
} }
} }
@ -1321,10 +1334,12 @@ impl<'a> System<'a> for Sys {
// entities. // entities.
physics_data.maintain_pushback_cache(); physics_data.maintain_pushback_cache();
let spatial_grid = physics_data.construct_spatial_grid(); let spatial_grid = physics_data.construct_spatial_grid().into_read_only();
physics_data.apply_pushback(job, &spatial_grid); physics_data.apply_pushback(job, &spatial_grid);
let voxel_collider_spatial_grid = physics_data.construct_voxel_collider_spatial_grid(); let voxel_collider_spatial_grid = physics_data
.construct_voxel_collider_spatial_grid()
.into_read_only();
physics_data.handle_movement_and_terrain(job, &voxel_collider_spatial_grid); physics_data.handle_movement_and_terrain(job, &voxel_collider_spatial_grid);
// Spatial grid used by other systems // Spatial grid used by other systems