Generate and inspect a diagram

Tagged releases include jc_voronoi.wasm, Emscripten’s ES-module loader, and a small browser/Node.js wrapper.

import { loadVoronoi } from "./voronoi.js";

const voronoi = await loadVoronoi();
const diagram = voronoi.generate(
  [{ x: 10, y: 20 }, { x: 80, y: 30 }, { x: 40, y: 90 }],
  100,
  100,
);

for (const edge of diagram.edges) {
  console.log(edge.pos[0], edge.pos[1]);
}

const cell = diagram.cell(0);
if (cell) {
  console.log(cell.site, cell.polygon, cell.edges, cell.neighbors);
}

The result is copied once into a compact JavaScript-owned ArrayBuffer. Sites, edges, cells, neighbors, and polygon points read that buffer directly without further WebAssembly calls. A cell is null when its input point was pruned.

The buffer is garbage-collected normally. Call diagram.dispose() only when you want to release it eagerly and invalidate the diagram immediately.

For large one-off diagrams, loadVoronoiWorker() provides the same result through an asynchronous generate() call. It transfers the packed buffer and terminates the worker before resolving, so the WebAssembly heap is not retained with the diagram.

Build the package locally with an installed Emscripten SDK:

./scripts/build_wasm.sh

The default output directory is build/wasm.