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

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

export default class ResetForces extends System {

  static get priority() {
    return {phase: 'post'};
  }

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

  tick(elapsed) {
    for (const {Forces} of this.select('default')) {
      if (0 !== Forces.forceX) {
        const factorX = Math.pow(1 - Forces.dampingX, elapsed);
        Forces.forceX *= factorX;
        if (Math.abs(Forces.forceX) <= 1) {
          Forces.forceX = 0;
        }
      }
      if (0 !== Forces.forceY) {
        const factorY = Math.pow(1 - Forces.dampingY, elapsed);
        Forces.forceY *= factorY;
        if (Math.abs(Forces.forceY) <= 1) {
          Forces.forceY = 0;
        }
      }
      Forces.impulseX = 0;
      Forces.impulseY = 0;
    }
  }

}