Voronoi diagram

Cargo.lock

@@ -2377,6 +2377,8 @@ version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
 dependencies = [
+ "allocator-api2",
+ "equivalent",
  "foldhash",
 ]
 
@@ -2890,6 +2892,7 @@ dependencies = [
  "bevy",
  "bevy_vello",
  "rand 0.9.0",
+ "spade",
 ]
 
 [[package]]
@@ -3681,6 +3684,12 @@ 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"
@@ -3954,6 +3963,18 @@ 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"

Cargo.toml

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

src/main.rs

@@ -1,6 +1,7 @@
 use bevy::prelude::*;
-use bevy_vello::{VelloPlugin, prelude::*, vello::kurbo::Point};
+use bevy_vello::{prelude::*, vello::kurbo::{Point, Stroke}, VelloPlugin};
 use rand::Rng;
+use spade::{DelaunayTriangulation, Point2, Triangulation, handles::VoronoiVertex};
 use std::ops::DerefMut;
 
 const JITTER: f64 = 0.5;
@@ -21,25 +22,34 @@ 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();
-    // Reset scene every frame
     scene.reset();
+    transform.scale = Vec3::ONE * 25.0;
 
+    let mut triangulation: DelaunayTriangulation<_> = DelaunayTriangulation::new();
     let mut rng = rand::rng();
     for x in -20..=20 {
         for y in -10..=10 {
-            let point = Point::new(
+            triangulation.insert(Point2::new(
                 (x as f64) + rng.random_range(-JITTER..=JITTER),
                 (y as f64) + rng.random_range(-JITTER..=JITTER),
-            );
+            )).unwrap();
-            scene.fill(
-                peniko::Fill::NonZero,
-                kurbo::Affine::default(),
-                peniko::Color::WHITE,
-                None,
-                &kurbo::Circle::new(point, 0.1),
-            );
         }
     }
 
-    transform.scale = Vec3::ONE * 25.0;
+    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),
+                    kurbo::Affine::default(),
+                    peniko::Color::WHITE,
+                    None,
+                    &kurbo::Line::new(Point::new(from.x, from.y), Point::new(to.x, to.y)),
+                );
+            }
+            _ => {}
+        }
+    }
 }