Method _map3dmoved

modules/core/Map3dSystem.js:360–387

* _map3dmoved * Respond to changes in the 3d map, for example if the user interacts with it. * Update zoom and bearing offsets from main map, and recenter the main map if needed.

()

   * Update zoom and bearing offsets from main map, and recenter the main map if needed.
   */
  _map3dmoved() {
    const context = this.context;
    const maplibre = this.maplibre;
    const map = context.systems.map;
    const viewport = context.viewport;
    const transform = viewport.transform;

    if (!maplibre) return;      // called too early?
    if (!this._lastv) return;   // haven't positioned the map yet (it may be at null island), Rapid#1441

    const mlCenter = maplibre.getCenter();
    const mlCenterLoc = [mlCenter.lng, mlCenter.lat];
    const mlZoom = maplibre.getZoom();
    const mlBearing = maplibre.getBearing();

    const mainCenterLoc = viewport.centerLoc();
    const mainZoom = transform.zoom;
    // Why a '-' here?  Because "bearing" is the angle that the user points, not the angle that north points.
    const mainBearing = numWrap(-transform.rotation * RAD2DEG, 0, 360);

    this._zDiff = mainZoom - mlZoom;
    this._bDiff = mainBearing - mlBearing;

    // Recenter main map, if 3dmap center moved
    if (!vecEqual(mainCenterLoc, mlCenterLoc, 1e-6)) {
      map.center(mlCenterLoc);
    }
  }


  /**