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Colorful voronoi cells

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This commit is contained in:
Niklas Korz 2025-03-30 18:04:24 +02:00
parent acd4a62d08
commit ffbdb33659
3 changed files with 51 additions and 41 deletions
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40
Cargo.lock generated
View file

@ -2377,8 +2377,6 @@ version = "0.15.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
dependencies = [
"allocator-api2",
"equivalent",
"foldhash",
]
@ -2710,6 +2708,15 @@ dependencies = [
"regex-automata 0.1.10",
]
[[package]]
name = "maybe_parallel_iterator"
version = "0.12.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5069b219d51d2ba2d9388623bd7eead5d4e7974bc8ff3ec9edbe36b09c0ef477"
dependencies = [
"rayon",
]
[[package]]
name = "memchr"
version = "2.7.4"
@ -2892,7 +2899,7 @@ dependencies = [
"bevy",
"bevy_vello",
"rand 0.9.0",
"spade",
"voronator",
]
[[package]]
@ -3684,12 +3691,6 @@ version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832"
[[package]]
name = "robust"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cbf4a6aa5f6d6888f39e980649f3ad6b666acdce1d78e95b8a2cb076e687ae30"
[[package]]
name = "rodio"
version = "0.19.0"
@ -3963,18 +3964,6 @@ dependencies = [
"serde",
]
[[package]]
name = "spade"
version = "2.13.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1ece03ff43cd2a9b57ebf776ea5e78bd30b3b4185a619f041079f4109f385034"
dependencies = [
"hashbrown 0.15.2",
"num-traits",
"robust",
"smallvec",
]
[[package]]
name = "spirv"
version = "0.3.0+sdk-1.3.268.0"
@ -4517,6 +4506,15 @@ version = "0.9.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
[[package]]
name = "voronator"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "07d8e6fe4b9b3b443f2e4ada327cf4b08ab5cdd27a42cd5c9f38dd29092c10ee"
dependencies = [
"maybe_parallel_iterator",
]
[[package]]
name = "walkdir"
version = "2.5.0"

2
Cargo.toml
View file

@ -15,4 +15,4 @@ opt-level = 3
bevy = "0.15.3"
bevy_vello = "0.7.1"
rand = "0.9.0"
spade = "2.13.1"
voronator = "0.2.1"

48
src/main.rs
View file

@ -1,7 +1,11 @@
use bevy::prelude::*;
use bevy_vello::{prelude::*, vello::kurbo::{Point, Stroke}, VelloPlugin};
use bevy_vello::{
VelloPlugin,
prelude::*,
vello::kurbo::{PathEl, Point},
};
use rand::Rng;
use spade::{DelaunayTriangulation, Point2, Triangulation, handles::VoronoiVertex};
use voronator::VoronoiDiagram;
use std::ops::DerefMut;
const JITTER: f64 = 0.5;
@ -23,33 +27,41 @@ fn setup_vector_graphics(mut commands: Commands) {
fn draw_map(mut query_scene: Single<(&mut Transform, &mut VelloScene)>) {
let (transform, scene) = query_scene.deref_mut();
scene.reset();
transform.scale = Vec3::ONE * 25.0;
transform.scale = Vec3::ONE * 30.0;
let mut triangulation: DelaunayTriangulation<_> = DelaunayTriangulation::new();
let mut rng = rand::rng();
let mut points = Vec::new();
for x in -20..=20 {
for y in -10..=10 {
triangulation.insert(Point2::new(
points.push((
(x as f64) + rng.random_range(-JITTER..=JITTER),
(y as f64) + rng.random_range(-JITTER..=JITTER),
)).unwrap();
));
}
}
let diagram = VoronoiDiagram::<voronator::delaunator::Point>::from_tuple(&(-20.0, -10.0), &(20.0, 10.0), &points).unwrap();
for edge in triangulation.undirected_voronoi_edges() {
match edge.vertices() {
[VoronoiVertex::Inner(from), VoronoiVertex::Inner(to)] => {
let from = from.circumcenter();
let to = to.circumcenter();
scene.stroke(
&Stroke::new(0.1),
for cell in diagram.cells() {
let mut first = true;
let mut path = Vec::new();
for point in cell.points() {
let point = Point::new(point.x, point.y);
if first {
first = false;
path.push(PathEl::MoveTo(point));
} else {
path.push(PathEl::LineTo(point));
}
}
let r = rng.random_range(0..=255);
let g = rng.random_range(0..=255);
let b = rng.random_range(0..=255);
scene.fill(
peniko::Fill::NonZero,
kurbo::Affine::default(),
peniko::Color::WHITE,
peniko::Color::from_rgb8(r, g, b),
None,
&kurbo::Line::new(Point::new(from.x, from.y), Point::new(to.x, to.y)),
&kurbo::BezPath::from_vec(path),
);
}
_ => {}
}
}
}