@thi.ng/boids/behaviors/alignment.js

n-dimensional boids simulation with modular behavior system

import { __ensureFn } from "../internal/ensure.js";
const alignment = (maxDist, weight = 1, amp) => {
  const $maxDist = __ensureFn(maxDist);
  const force = [];
  return {
    weight: __ensureFn(weight),
    update: (boid) => {
      const { add, maddN, setN } = boid.api;
      const neighbors = boid.neighbors($maxDist(boid), boid.pos.curr);
      const num = neighbors.length;
      let i, n;
      setN(force, 0);
      for (i = 0; i < num; i++) {
        n = neighbors[i];
        if (n !== boid) {
          amp ? maddN(force, n.vel.curr, amp(boid, n), force) : add(force, force, n.vel.curr);
        }
      }
      return boid.averageForce(force, num - 1);
    }
  };
};
export {
  alignment
};