@thi.ng/vectors/reflect.js

Optimized 2d/3d/4d and arbitrary length vector operations, support for memory mapping/layouts

import { dot } from "./dot.js";
import { maddN } from "./maddn.js";
const reflect = (out, a, b) => maddN(out || a, b, -2 * dot(a, b), a);
export {
  reflect
};