Colorful voronoi cells

Cargo.lock

@@ -75,7 +75,7 @@ checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
 dependencies = [
  "cfg-if",
  "const-random",
- "getrandom",
+ "getrandom 0.2.15",
  "once_cell",
  "version_check",
  "zerocopy 0.7.35",
@@ -790,7 +790,7 @@ dependencies = [
  "derive_more",
  "glam",
  "itertools",
- "rand",
+ "rand 0.8.5",
  "rand_distr",
  "serde",
  "smallvec",
@@ -1168,7 +1168,7 @@ checksum = "63c2174d43a0de99f863c98a472370047a2bfa7d1e5cec8d9d647fb500905d9d"
 dependencies = [
  "ahash",
  "bevy_utils_proc_macros",
- "getrandom",
+ "getrandom 0.2.15",
  "hashbrown 0.14.5",
  "thread_local",
  "tracing",
@@ -1544,7 +1544,7 @@ version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f9d839f2a20b0aee515dc581a6172f2321f96cab76c1a38a4c584a194955390e"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
  "once_cell",
  "tiny-keccak",
 ]
@@ -2148,10 +2148,22 @@ dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasi 0.14.2+wasi-0.2.4",
+]
+
 [[package]]
 name = "gif"
 version = "0.13.1"
@@ -2214,7 +2226,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc46dd3ec48fdd8e693a98d2b8bafae273a2d54c1de02a2a7e3d57d501f39677"
 dependencies = [
  "bytemuck",
- "rand",
+ "rand 0.8.5",
  "serde",
 ]
 
@@ -2696,6 +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"
@@ -2877,6 +2898,8 @@ version = "0.1.0"
 dependencies = [
  "bevy",
  "bevy_vello",
+ "rand 0.9.0",
+ "voronator",
 ]
 
 [[package]]
@@ -3444,6 +3467,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r-efi"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+
 [[package]]
 name = "radsort"
 version = "0.1.1"
@@ -3457,8 +3486,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha",
+ "rand_chacha 0.3.1",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.3",
+ "zerocopy 0.8.24",
 ]
 
 [[package]]
@@ -3468,7 +3508,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.3",
 ]
 
 [[package]]
@@ -3477,7 +3527,16 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
+dependencies = [
+ "getrandom 0.3.2",
 ]
 
 [[package]]
@@ -3487,7 +3546,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32cb0b9bc82b0a0876c2dd994a7e7a2683d3e7390ca40e6886785ef0c7e3ee31"
 dependencies = [
  "num-traits",
- "rand",
+ "rand 0.8.5",
 ]
 
 [[package]]
@@ -4354,7 +4413,7 @@ version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3758f5e68192bb96cc8f9b7e2c2cfdabb435499a28499a42f8f984092adad4b"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
  "serde",
 ]
 
@@ -4447,6 +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"
@@ -4463,6 +4531,15 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasi"
+version = "0.14.2+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.100"
@@ -5193,6 +5270,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags 2.9.0",
+]
+
 [[package]]
 name = "x11-dl"
 version = "2.21.0"

Cargo.toml

@@ -14,3 +14,5 @@ opt-level = 3
 [dependencies]
 bevy = "0.15.3"
 bevy_vello = "0.7.1"
+rand = "0.9.0"
+voronator = "0.2.1"

src/main.rs

@@ -1,13 +1,21 @@
 use bevy::prelude::*;
-use bevy_vello::{VelloPlugin, prelude::*};
+use bevy_vello::{
+    VelloPlugin,
+    prelude::*,
+    vello::kurbo::{PathEl, Point},
+};
+use rand::Rng;
+use voronator::VoronoiDiagram;
 use std::ops::DerefMut;
 
+const JITTER: f64 = 0.5;
+
 fn main() {
     App::new()
         .add_plugins(DefaultPlugins)
         .add_plugins(VelloPlugin::default())
         .add_systems(Startup, setup_vector_graphics)
-        .add_systems(Update, simple_animation)
+        .add_systems(PostStartup, draw_map)
         .run();
 }
 
@@ -16,29 +24,44 @@ fn setup_vector_graphics(mut commands: Commands) {
     commands.spawn(VelloScene::new());
 }
 
-fn simple_animation(mut query_scene: Single<(&mut Transform, &mut VelloScene)>, time: Res<Time>) {
+fn draw_map(mut query_scene: Single<(&mut Transform, &mut VelloScene)>) {
-    let sin_time = time.elapsed_secs().sin().mul_add(0.5, 0.5);
     let (transform, scene) = query_scene.deref_mut();
-    // Reset scene every frame
     scene.reset();
+    transform.scale = Vec3::ONE * 30.0;
 
-    // Animate color green to blue
+    let mut rng = rand::rng();
-    let c = Vec3::lerp(
+    let mut points = Vec::new();
-        Vec3::new(-1.0, 1.0, -1.0),
+    for x in -20..=20 {
-        Vec3::new(-1.0, 1.0, 1.0),
+        for y in -10..=10 {
-        sin_time + 0.5,
+            points.push((
-    );
+                (x as f64) + rng.random_range(-JITTER..=JITTER),
+                (y as f64) + rng.random_range(-JITTER..=JITTER),
+            ));
+        }
+    }
+    let diagram = VoronoiDiagram::<voronator::delaunator::Point>::from_tuple(&(-20.0, -10.0), &(20.0, 10.0), &points).unwrap();
 
-    // Animate the corner radius
+    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::new([c.x, c.y, c.z, 1.]),
+            peniko::Color::from_rgb8(r, g, b),
             None,
-        &kurbo::RoundedRect::new(-50.0, -50.0, 50.0, 50.0, (sin_time as f64) * 50.0),
+            &kurbo::BezPath::from_vec(path),
         );
-
+    }
-    transform.scale = Vec3::lerp(Vec3::ONE * 0.5, Vec3::ONE * 1.0, sin_time);
-    transform.translation = Vec3::lerp(Vec3::X * -100.0, Vec3::X * 100.0, sin_time);
-    transform.rotation = Quat::from_rotation_z(-std::f32::consts::TAU * sin_time);
 }