silphius/app/ecs-systems/apply-forces.js

import {System} from '@/ecs/index.js';

export default class ApplyForces extends System {

  static queries() {
    return {
      default: ['Position', 'Forces'],
    };
  }

  tick(elapsed) {
    for (const {Position, Forces} of this.select('default')) {
      Position.x += elapsed * (Forces.impulseX + Forces.forceX);
      Position.y += elapsed * (Forces.impulseY + Forces.forceY);
    }
  }

}