@thi.ng/vectors/minor.js

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

import { min2id, min3id, min4id } from "@thi.ng/math/interval";
import { vop } from "./vop.js";
const abs = Math.abs;
const minor = vop();
minor.default((a) => {
  let id = -1;
  let min = Infinity;
  for (let i = 0, n = a.length; i < n; i++) {
    const x = abs(a[i]);
    if (x < min) {
      min = x;
      id = i;
    }
  }
  return id;
});
const minor2 = minor.add(2, (a) => min2id(abs(a[0]), abs(a[1])));
const minor3 = minor.add(
  3,
  (a) => min3id(abs(a[0]), abs(a[1]), abs(a[2]))
);
const minor4 = minor.add(
  4,
  (a) => min4id(abs(a[0]), abs(a[1]), abs(a[2]), abs(a[3]))
);
export {
  minor,
  minor2,
  minor3,
  minor4
};