@polygonjs/polygonjs/dist/src/core/geometry/operation/Jitter.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
import { Vector3 } from "three";
import { randFloat } from "../../math/_Module";
const _offset = new Vector3();
const _p = new Vector3();
const _points = [];
export function jitterOffset(i, seed, mult, amount, target) {
  target.set(
    2 * (randFloat(i * 75 + 764 + seed) - 0.5),
    2 * (randFloat(i * 5678 + 3653 + seed) - 0.5),
    2 * (randFloat(i * 657 + 48464 + seed) - 0.5)
  );
  target.normalize();
  target.multiply(mult);
  target.multiplyScalar(amount * randFloat(i * 78 + 54 + seed));
}
export function jitterPositions(coreGroup, options) {
  const { amount, mult, seed } = options;
  coreGroup.points(_points);
  let i = 0;
  for (const point of _points) {
    jitterOffset(i, seed, mult, amount, _offset);
    point.position(_p);
    _p.add(_offset);
    point.setPosition(_p);
    i++;
  }
}