/* global AFRAME */
// The world that's loaded (campfire, temple, …) is the entity marked
// `data-world="<component>"` in its template. Its component provides `seats`
// ([{ x, y, z, yaw }]) and may provide:
//   spawn                 { x, z, yaw } where people arrive
//   screen                { x, y, z, yaw, width } where a shared screen first
//                         appears (screens.js): the middle of its picture. At
//                         yaw 0 it faces +z, toward someone who arrived with
//                         spawn yaw 0
//   confine(headPos)      moves a head position back inside the walkable area
//   floorAt(x, z)         floor height there
//   tools                 [{ name, label, object, grip, tip, butt, ink }]: things to
//                         pick up and draw with (wield.js). Each lies along its
//                         object's +x; grip, tip and butt are local Vector3s and
//                         ink is a '#rrggbb' color
//   touchables            [{ name, label(), distance(worldPos), use() }]: things
//                         to reach for in VR; the trigger calls use() (wield.js)
// Worlds that leave these out get the campfire's defaults in locomotion.js.
window.CurrentWorld = function (sceneEl) {
  const el = (sceneEl || AFRAME.scenes[0]).querySelector('[data-world]');
  return (el && el.components[el.dataset.world]) || null;
};