@thi.ng/geom-tessellate/tri-fan.js

2D/3D convex polygon tessellators

import { centroid } from "@thi.ng/geom-poly-utils/centroid";
const triFan = (tess, faces, pids) => {
  const c = tess.addPoint(centroid(tess.pointsForIDs(pids)));
  const n = pids.length - 1;
  for (let i = 0; i <= n; i++) {
    faces.push([c, pids[i], pids[i < n ? i + 1 : 0]]);
  }
  return faces;
};
export {
  triFan
};