Method onAdd

src/maplibregl/overlay/FGBLayer.js:82–106

* @function FGBLayer.prototype.onAdd * @param {maplibregl.Map} map - MapLibreGL Map 对象。

(map)

   * @param {maplibregl.Map} map - MapLibreGL Map 对象。
   */
  onAdd(map) {
    this.map = map;
    let extent = [];
    if (this.strategy === 'bbox') {
      const bounds = this.map.getBounds().toArray();
      extent = [
        bounds[0][0],
        bounds[0][1],
        bounds[1][0],
        bounds[1][1]
      ];
      this.map.on('moveend', this._updateFeaturesFn);
    }

    if (this.extent) {
      const intersectExtent = getIntersection(this.extent, extent);
      if (intersectExtent && intersectExtent.length) {
        extent = intersectExtent;
      } else {
        extent = this.extent;
      }
    }
    this.renderer = new FGBLayerRenderer(this.options);
    this._handleFeatures(extent);
  }
  /**
    * @function FGBLayer.prototype.render
  */