silphius/app/ecs/components/direction.js

import Component from '@/ecs/component.js';
import {HALF_PI, TAU} from '@/util/math.js';

export default class Direction extends Component {
  instanceFromSchema() {
    return class DirectionInstance extends super.instanceFromSchema() {
      static quantize(d, n) {
        return Math.floor(((d + (TAU / (n * 2))) % TAU) / (TAU / n));
      }
      quantize(n) {
        return this.constructor.quantize(this.direction, n);
      }
    };
  }
  static properties = {
    direction: {defaultValue: HALF_PI, type: 'float32'},
  };
}