@thi.ng/boids/region.js

n-dimensional boids simulation with modular behavior system

import {} from "@thi.ng/api";
class Radial {
  constructor(dist, target, radius = Infinity) {
    this.dist = dist;
    this.target = target;
    this.setRadius(radius);
  }
  radius;
  _r;
  _items = [];
  deref() {
    return this._items;
  }
  reset() {
    this._items.length = 0;
    return this;
  }
  setRadius(r) {
    if (this.radius !== r) {
      this.radius = Math.max(0, r);
      this._r = this.dist.to(this.radius);
    }
    this._items.length = 0;
    return this;
  }
  includesDistance(d, eucledian = true) {
    return (eucledian ? this.dist.to(d) : d) <= this._r;
  }
  includesPosition(pos) {
    return this.dist.metric(this.target, pos) <= this._r;
  }
  consider(pos, val) {
    const d = this.dist.metric(this.target, pos);
    d <= this._r && this._items.push(val);
    return d;
  }
}
export {
  Radial
};