silphius/app/ecs/systems/apply-control-movement.js

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

export default class ApplyControlMovement extends System {

  static get priority() {
    return {
      before: 'IntegratePhysics',
    };
  }

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

  tick() {
    for (const {Controlled, Forces, Speed} of this.select('default')) {
      if (!Controlled.locked) {
        const movement = normalizeVector({
          x: (Controlled.moveRight - Controlled.moveLeft),
          y: (Controlled.moveDown - Controlled.moveUp),
        });
        Forces.applyImpulse({
          x: Speed.speed * movement.x,
          y: Speed.speed * movement.y,
        });
      }
    }
  }

}