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8 commits

Author SHA1 Message Date
joe
36ffce22f9 make range benchmark have random distributed points 2026-01-22 21:46:24 -08:00
Joe
0a54cad11e futz 2026-01-22 19:56:42 -08:00
joe
c9bab10f6b more tweak 2026-01-21 22:57:59 -08:00
joe
24b7709b4c tweak 2026-01-21 22:54:06 -08:00
joe
ccb598ac1f adds benchmark, perf parity with source crate 2026-01-21 22:35:15 -08:00
Joe
969c84d9cc all impl'd, should work 2026-01-21 19:05:25 -08:00
joe
d8f1ffd801 rstar-tree compiles, but has some missing impls 2026-01-21 00:09:52 -08:00
Joe
228c6ff976 start moving rstar tree code into lib 2026-01-20 19:49:07 -08:00
12 changed files with 535 additions and 56 deletions

4
.rustfmt.toml Normal file
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@ -0,0 +1,4 @@
imports_granularity = "Crate"
group_imports = "StdExternalCrate"
wrap_comments = true
edition = "2024"

211
Cargo.lock generated
View file

@ -103,6 +103,15 @@ dependencies = [
"memchr", "memchr",
] ]
[[package]]
name = "alloca"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e5a7d05ea6aea7e9e64d25b9156ba2fee3fdd659e34e41063cd2fc7cd020d7f4"
dependencies = [
"cc",
]
[[package]] [[package]]
name = "allocator-api2" name = "allocator-api2"
version = "0.2.21" version = "0.2.21"
@ -173,6 +182,18 @@ dependencies = [
"libc", "libc",
] ]
[[package]]
name = "anes"
version = "0.1.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
[[package]]
name = "anstyle"
version = "1.0.13"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
[[package]] [[package]]
name = "anymap3" name = "anymap3"
version = "1.0.1" version = "1.0.1"
@ -330,16 +351,18 @@ dependencies = [
] ]
[[package]] [[package]]
name = "autobats" name = "autobarts"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"bevy", "bevy",
"criterion",
"dirs", "dirs",
"glam 0.31.0",
"include_dir", "include_dir",
"ordered-float", "ordered-float",
"rand",
"rusqlite", "rusqlite",
"rusqlite_migration", "rusqlite_migration",
"spart",
"steel-core", "steel-core",
] ]
@ -964,7 +987,7 @@ dependencies = [
"arrayvec 0.7.6", "arrayvec 0.7.6",
"bevy_reflect", "bevy_reflect",
"derive_more", "derive_more",
"glam", "glam 0.30.10",
"itertools 0.14.0", "itertools 0.14.0",
"libm", "libm",
"rand", "rand",
@ -1138,7 +1161,7 @@ dependencies = [
"downcast-rs 2.0.2", "downcast-rs 2.0.2",
"erased-serde", "erased-serde",
"foldhash 0.2.0", "foldhash 0.2.0",
"glam", "glam 0.30.10",
"indexmap 2.13.0", "indexmap 2.13.0",
"inventory", "inventory",
"petgraph", "petgraph",
@ -1198,7 +1221,7 @@ dependencies = [
"downcast-rs 2.0.2", "downcast-rs 2.0.2",
"encase", "encase",
"fixedbitset", "fixedbitset",
"glam", "glam 0.30.10",
"image", "image",
"indexmap 2.13.0", "indexmap 2.13.0",
"js-sys", "js-sys",
@ -1767,6 +1790,12 @@ dependencies = [
"wayland-client", "wayland-client",
] ]
[[package]]
name = "cast"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
[[package]] [[package]]
name = "castaway" name = "castaway"
version = "0.2.4" version = "0.2.4"
@ -1826,6 +1855,33 @@ dependencies = [
"windows-link 0.2.1", "windows-link 0.2.1",
] ]
[[package]]
name = "ciborium"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
dependencies = [
"ciborium-io",
"ciborium-ll",
"serde",
]
[[package]]
name = "ciborium-io"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
[[package]]
name = "ciborium-ll"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
dependencies = [
"ciborium-io",
"half",
]
[[package]] [[package]]
name = "clang-sys" name = "clang-sys"
version = "1.8.1" version = "1.8.1"
@ -1837,6 +1893,31 @@ dependencies = [
"libloading", "libloading",
] ]
[[package]]
name = "clap"
version = "4.5.54"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c6e6ff9dcd79cff5cd969a17a545d79e84ab086e444102a591e288a8aa3ce394"
dependencies = [
"clap_builder",
]
[[package]]
name = "clap_builder"
version = "4.5.54"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fa42cf4d2b7a41bc8f663a7cab4031ebafa1bf3875705bfaf8466dc60ab52c00"
dependencies = [
"anstyle",
"clap_lex",
]
[[package]]
name = "clap_lex"
version = "0.7.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c3e64b0cc0439b12df2fa678eae89a1c56a529fd067a9115f7827f1fffd22b32"
[[package]] [[package]]
name = "codegen" name = "codegen"
version = "0.2.0" version = "0.2.0"
@ -2112,6 +2193,40 @@ dependencies = [
"cfg-if", "cfg-if",
] ]
[[package]]
name = "criterion"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4d883447757bb0ee46f233e9dc22eb84d93a9508c9b868687b274fc431d886bf"
dependencies = [
"alloca",
"anes",
"cast",
"ciborium",
"clap",
"criterion-plot",
"itertools 0.13.0",
"num-traits",
"oorandom",
"page_size",
"rayon",
"regex",
"serde",
"serde_json",
"tinytemplate",
"walkdir",
]
[[package]]
name = "criterion-plot"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ed943f81ea2faa8dcecbbfa50164acf95d555afec96a27871663b300e387b2e4"
dependencies = [
"cast",
"itertools 0.13.0",
]
[[package]] [[package]]
name = "critical-section" name = "critical-section"
version = "1.2.0" version = "1.2.0"
@ -2127,6 +2242,25 @@ dependencies = [
"crossbeam-utils", "crossbeam-utils",
] ]
[[package]]
name = "crossbeam-deque"
version = "0.8.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
dependencies = [
"crossbeam-epoch",
"crossbeam-utils",
]
[[package]]
name = "crossbeam-epoch"
version = "0.9.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
dependencies = [
"crossbeam-utils",
]
[[package]] [[package]]
name = "crossbeam-queue" name = "crossbeam-queue"
version = "0.3.12" version = "0.3.12"
@ -2742,6 +2876,15 @@ dependencies = [
"serde_core", "serde_core",
] ]
[[package]]
name = "glam"
version = "0.31.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "74a4d85559e2637d3d839438b5b3d75c31e655276f9544d72475c36b92fabbed"
dependencies = [
"libm",
]
[[package]] [[package]]
name = "glob" name = "glob"
version = "0.3.3" version = "0.3.3"
@ -2941,7 +3084,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "29a164ceff4500f2a72b1d21beaa8aa8ad83aec2b641844c659b190cb3ea2e0b" checksum = "29a164ceff4500f2a72b1d21beaa8aa8ad83aec2b641844c659b190cb3ea2e0b"
dependencies = [ dependencies = [
"constgebra", "constgebra",
"glam", "glam 0.30.10",
"tinyvec", "tinyvec",
] ]
@ -4010,6 +4153,12 @@ version = "1.21.3"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d" checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
[[package]]
name = "oorandom"
version = "11.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d6790f58c7ff633d8771f42965289203411a5e5c68388703c06e14f24770b41e"
[[package]] [[package]]
name = "option-ext" name = "option-ext"
version = "0.2.0" version = "0.2.0"
@ -4044,6 +4193,16 @@ dependencies = [
"ttf-parser", "ttf-parser",
] ]
[[package]]
name = "page_size"
version = "0.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "30d5b2194ed13191c1999ae0704b7839fb18384fa22e49b57eeaa97d79ce40da"
dependencies = [
"libc",
"winapi",
]
[[package]] [[package]]
name = "parking" name = "parking"
version = "2.2.1" version = "2.2.1"
@ -4370,6 +4529,26 @@ version = "0.6.2"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "20675572f6f24e9e76ef639bc5552774ed45f1c30e2951e1e99c59888861c539" checksum = "20675572f6f24e9e76ef639bc5552774ed45f1c30e2951e1e99c59888861c539"
[[package]]
name = "rayon"
version = "1.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
dependencies = [
"either",
"rayon-core",
]
[[package]]
name = "rayon-core"
version = "1.13.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "22e18b0f0062d30d4230b2e85ff77fdfe4326feb054b9783a3460d8435c8ab91"
dependencies = [
"crossbeam-deque",
"crossbeam-utils",
]
[[package]] [[package]]
name = "read-fonts" name = "read-fonts"
version = "0.35.0" version = "0.35.0"
@ -4795,16 +4974,6 @@ dependencies = [
"serde", "serde",
] ]
[[package]]
name = "spart"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7a05d85e94c16e35b2f963dee2eaa6f6b2494ee5dad740b045b139c5614872d6"
dependencies = [
"ordered-float",
"tracing",
]
[[package]] [[package]]
name = "spin" name = "spin"
version = "0.10.0" version = "0.10.0"
@ -5120,6 +5289,16 @@ dependencies = [
"zerovec", "zerovec",
] ]
[[package]]
name = "tinytemplate"
version = "1.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
dependencies = [
"serde",
"serde_json",
]
[[package]] [[package]]
name = "tinyvec" name = "tinyvec"
version = "1.10.0" version = "1.10.0"

View file

@ -1,16 +1,17 @@
[package] [package]
name = "autobats" name = "autobarts"
version = "0.1.0" version = "0.1.0"
edition = "2024" edition = "2024"
[dependencies] [dependencies]
bevy = { version = "0.18", default-features = false, features = ["2d"] } bevy = { version = "0.18", default-features = false, features = ["2d"] }
criterion = { version = "0.8.1", default-features = false, features = ["cargo_bench_support", "rayon"] }
dirs = "6.0.0" dirs = "6.0.0"
glam = { version = "0.31.0", default-features = false, features = ["libm"] }
include_dir = "0.7.4" include_dir = "0.7.4"
ordered-float = "5.1.0" ordered-float = "5.1.0"
rusqlite = { version = "0.37", default-features = false, features = ["bundled", "blob", "functions", "jiff"] } rusqlite = { version = "0.37", default-features = false, features = ["bundled", "blob", "functions", "jiff"] }
rusqlite_migration = { version = "2.3.0", features = ["from-directory"] } rusqlite_migration = { version = "2.3.0", features = ["from-directory"] }
spart = "0.5.0"
steel-core = { git="https://github.com/mattwparas/steel.git", branch = "master" } steel-core = { git="https://github.com/mattwparas/steel.git", branch = "master" }
# Enable a small amount of optimization in the dev profile. # Enable a small amount of optimization in the dev profile.
@ -20,3 +21,13 @@ opt-level = 1
# Enable a large amount of optimization in the dev profile for dependencies. # Enable a large amount of optimization in the dev profile for dependencies.
[profile.dev.package."*"] [profile.dev.package."*"]
opt-level = 3 opt-level = 3
[profile.bench]
inherits = "release"
[[bench]]
name = "main"
harness = false
[dev-dependencies]
rand = "0.9.2"

View file

@ -0,0 +1,26 @@
#[path = "shared.rs"]
mod shared;
use std::hint::black_box;
use autobarts::spindex::RStarTree;
use criterion::{Criterion, criterion_group};
use shared::*;
fn bench_insert_bulk_rstartree_2d(_c: &mut Criterion) {
let points = generate_2d_data();
let mut cc = configure_criterion();
cc.bench_function("insert_bulk_2d_rstartree", |b| {
b.iter_with_setup(
|| {
let tree = RStarTree::new(BENCH_NODE_CAPACITY);
(tree, points.clone())
},
|(mut tree, points)| {
tree.insert_bulk(points);
black_box(());
},
)
});
}
criterion_group!(benches, bench_insert_bulk_rstartree_2d,);

View file

@ -0,0 +1,92 @@
use std::hint::black_box;
use autobarts::{geom::Point, spindex::RStarTree};
use bevy::math::Vec2;
use criterion::{Criterion, criterion_group};
use rand::{Rng, SeedableRng, seq::SliceRandom};
//
// Benchmark Parameters
//
pub const BENCH_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10);
pub const BENCH_NUM_INSERT: i32 = 50_000;
pub const BENCH_NODE_CAPACITY: usize = 5;
const SEED: u64 = 8;
//
// Data Generation Functions (Raw Data)
//
pub fn generate_2d_data() -> Vec<Point> {
let data: Vec<Point> = (0..BENCH_NUM_INSERT)
.map(|i| {
let point = bevy::prelude::Vec2::new(i as f32, i as f32);
Point {
point,
entity: bevy::prelude::Entity::PLACEHOLDER,
}
})
.collect();
data
}
// Configure Criterion with a timeout for benchmarks
pub fn configure_criterion() -> Criterion {
Criterion::default()
.measurement_time(BENCH_TIMEOUT)
.sample_size(10)
}
const BENCH_RANGE_RADIUS: f32 = 30.0;
fn benchmark_range_rstartree_2d(_c: &mut Criterion) {
let mut points = generate_2d_data();
let mut rng = rand::rngs::StdRng::seed_from_u64(SEED);
let len = points.len();
for i in 0..len {
let j = rng.random_range(0..len);
points.swap(i, j);
}
let mut tree = RStarTree::new(BENCH_NODE_CAPACITY);
tree.insert_bulk(points.clone());
let mut cc = configure_criterion();
let mut idx = 0;
let len = points.len();
cc.bench_function("range_rstartree_2d", |b| {
b.iter(|| {
let res = tree.range_search(&points[idx], BENCH_RANGE_RADIUS);
idx = (idx + 1) % len;
black_box(res)
})
});
}
fn benchmark_range_bbox_rstartree_2d(_c: &mut Criterion) {
let points = generate_2d_data();
let mut tree = RStarTree::new(BENCH_NODE_CAPACITY);
tree.insert_bulk(points);
let query_rect = bevy::math::bounding::Aabb2d::new(
Vec2::new(35.0 - BENCH_RANGE_RADIUS, 45.0 - BENCH_RANGE_RADIUS),
4.0 * Vec2::splat(BENCH_RANGE_RADIUS),
);
let mut cc = configure_criterion();
cc.bench_function("range_rstartree_2d", |b| {
b.iter(|| {
let res = tree.range_search_bbox(&query_rect);
black_box(res)
})
});
}
criterion_group!(
benches,
benchmark_range_rstartree_2d,
//benchmark_range_bbox_rstartree_2d,
);

6
benches/main.rs Normal file
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@ -0,0 +1,6 @@
use criterion::criterion_main;
//mod bench_insert_bulk;
mod bench_range_search;
criterion_main!(bench_range_search::benches,);

34
benches/shared.rs Normal file
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@ -0,0 +1,34 @@
use autobarts::geom::Point;
use criterion::Criterion;
//
// Benchmark Parameters
//
pub const BENCH_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10);
pub const BENCH_NUM_INSERT: i32 = 50_000;
pub const BENCH_NODE_CAPACITY: usize = 5;
//
// Data Generation Functions (Raw Data)
//
pub fn generate_2d_data() -> Vec<Point> {
let data: Vec<Point> = (0..BENCH_NUM_INSERT)
.map(|i| {
let point = bevy::prelude::Vec2::new(i as f32, i as f32);
Point {
point,
entity: bevy::prelude::Entity::PLACEHOLDER,
}
})
.collect();
data
}
// Configure Criterion with a timeout for benchmarks
pub fn configure_criterion() -> Criterion {
Criterion::default()
.measurement_time(BENCH_TIMEOUT)
.sample_size(10)
}

View file

@ -1,7 +1,7 @@
use std::{path::PathBuf, sync::LazyLock}; use std::{path::PathBuf, sync::LazyLock};
use include_dir::{include_dir, Dir}; use include_dir::{Dir, include_dir};
use rusqlite::{config::DbConfig, Connection}; use rusqlite::{Connection, config::DbConfig};
use rusqlite_migration::Migrations; use rusqlite_migration::Migrations;
static MIGRATIONS_DIR: Dir = include_dir!("$CARGO_MANIFEST_DIR/migrations"); static MIGRATIONS_DIR: Dir = include_dir!("$CARGO_MANIFEST_DIR/migrations");

View file

@ -1,8 +1,9 @@
use std::cmp::Ordering; use std::cmp::Ordering;
use bevy::prelude::*; use bevy::{math::bounding::Aabb2d, prelude::*};
use ordered_float::OrderedFloat; use ordered_float::OrderedFloat;
use spart::{geometry::BoundingVolume, rstar_tree::RStarTreeObject};
const POINT_RADIUS: f32 = f32::EPSILON * 16.0;
#[derive(Debug, Clone)] #[derive(Debug, Clone)]
pub struct Point { pub struct Point {
@ -29,35 +30,8 @@ impl PartialOrd for Point {
} }
} }
impl RStarTreeObject for Point { impl Point {
type B = PointBox; pub fn mbr(&self) -> Aabb2d {
Aabb2d::new(self.point, Vec2::splat(POINT_RADIUS))
fn mbr(&self) -> Self::B {
todo!()
}
}
#[derive(Debug, Clone)]
pub struct PointBox;
impl BoundingVolume for PointBox {
fn area(&self) -> f64 {
todo!()
}
fn union(&self, other: &Self) -> Self {
todo!()
}
fn intersects(&self, other: &Self) -> bool {
todo!()
}
fn overlap(&self, other: &Self) -> f64 {
todo!()
}
fn margin(&self) -> f64 {
todo!()
} }
} }

3
src/lib.rs Normal file
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@ -0,0 +1,3 @@
pub mod db;
pub mod geom;
pub mod spindex;

View file

@ -1,8 +1,5 @@
use autobarts::db::init_db;
use bevy::prelude::*; use bevy::prelude::*;
use db::init_db;
mod db;
mod geom;
fn main() { fn main() {
App::new() App::new()

153
src/spindex.rs Normal file
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@ -0,0 +1,153 @@
// based on code stolen under the terms of the MIT license from
// https://github.com/habedi/spart/blob/0f0e92c556b8906801d3f8b9c2a8a6491f493d9c/src/rstar_tree.rs
use bevy::{
math::bounding::{Aabb2d, BoundingVolume, IntersectsVolume},
prelude::Vec2,
};
use crate::geom::Point;
#[derive(Debug, Clone)]
pub enum Entry {
Leaf { mbr: Aabb2d, object: Point },
Node { mbr: Aabb2d, child: TreeNode },
}
impl Entry {
/// Returns a reference to the minimum bounding volume for this entry.
pub fn mbr(&self) -> &Aabb2d {
match self {
Entry::Leaf { mbr, .. } | Entry::Node { mbr, .. } => mbr,
}
}
}
#[derive(Debug, Clone)]
pub struct TreeNode {
pub entries: Vec<Entry>,
pub is_leaf: bool,
}
#[derive(Debug, Clone)]
pub struct RStarTree {
root: TreeNode,
max_entries: usize,
}
impl Entry {
fn as_leaf_obj(&self) -> Option<&Point> {
match self {
Entry::Leaf { object, .. } => Some(object),
_ => None,
}
}
fn child(&self) -> Option<&TreeNode> {
match self {
Entry::Node { child, .. } => Some(child),
_ => None,
}
}
}
impl TreeNode {
fn is_leaf(&self) -> bool {
self.is_leaf
}
fn entries(&self) -> &[Entry] {
&self.entries
}
fn range_search_bbox<'s>(&'s self, bbox: &Aabb2d, out: &mut Vec<&'s Point>) {
if self.is_leaf() {
for entry in self.entries() {
if let Some(obj) = entry.as_leaf_obj()
&& entry.mbr().intersects(bbox)
{
out.push(obj);
}
}
} else {
for entry in self.entries() {
if let Some(child) = entry.child()
&& entry.mbr().intersects(bbox)
{
child.range_search_bbox(bbox, out);
}
}
}
}
fn mbr(&self) -> Option<Aabb2d> {
entries_mbr(self.entries())
}
}
impl RStarTree {
pub fn new(max_entries: usize) -> Self {
let max_entries = max_entries.max(4);
RStarTree {
root: TreeNode {
entries: Vec::new(),
is_leaf: true,
},
max_entries,
}
}
pub fn range_search(&self, query_point: &Point, radius: f32) -> Vec<&Point> {
let query_bbox = Aabb2d::new(query_point.point, Vec2::splat(radius));
let r2 = radius.powi(2);
let candidates = self.range_search_bbox(&query_bbox);
candidates
.into_iter()
.filter(|&other| query_point.point.distance_squared(other.point) <= r2)
.collect()
}
pub fn range_search_bbox(&self, query_bbox: &Aabb2d) -> Vec<&Point> {
let mut res = Vec::with_capacity(self.root.entries.len() / 10);
self.root.range_search_bbox(query_bbox, &mut res);
res
}
pub fn insert_bulk(&mut self, objects: Vec<Point>) {
if objects.is_empty() {
return;
}
let mut entries: Vec<Entry> = objects
.into_iter()
.map(|point| Entry::Leaf {
mbr: point.mbr(),
object: point,
})
.collect();
while entries.len() > self.max_entries {
let mut new_level_entries = Vec::new();
let chunks = entries.chunks(self.max_entries);
for chunk in chunks {
let child = TreeNode {
entries: chunk.to_vec(),
is_leaf: self.root.is_leaf,
};
if let Some(mbr) = child.mbr() {
new_level_entries.push(Entry::Node { mbr, child });
}
}
entries = new_level_entries;
self.root.is_leaf = false;
}
self.root.entries.extend(entries);
}
}
fn entries_mbr(entries: &[Entry]) -> Option<Aabb2d> {
let mut iter = entries.iter();
let first = *iter.next()?.mbr();
Some(iter.fold(first, |acc, entry| acc.merge(entry.mbr())))
}