silphius/app/ecs-components/position.js

import Component from '@/ecs/component.js';

export default class Position extends Component {
  instanceFromSchema() {
    const Instance = super.instanceFromSchema();
    const Component = this;
    Object.defineProperty(Instance.prototype, 'tile', {
      get: function () {
        const {TileLayers} = Component.ecs.get(1);
        const {Position: {x, y}} = Component.ecs.get(this.entity);
        const {tileSize} = TileLayers.layers[0];
        return {
          x: (x - (x % tileSize.x)) / tileSize.x,
          y: (y - (y % tileSize.y)) / tileSize.y,
        }
      },
    });
    return Instance;
  }
  static properties = {
    x: {type: 'float32'},
    y: {type: 'float32'},
  };
}