Method add

src/mapboxgl/mapping/GeojsonSource.js:30–55

* @function GeojsonSource.prototype.add * @description 添加数据源。 * @param {string} id - 数据源 Id。 * @param {Object} source

(id, source)

   * @param {Object} source
   */
  add(id, source) {
    if (this.map.getSource(id)) {
      return;
    }
    const newData = cloneDeep(source.data);
    featureEach(newData, (currentFeature) => {
      coordEach(currentFeature, (curCoords) => {
        let transCurCoords = proj4('EPSG:4326', 'EPSG:3857', curCoords);
        let transCoords = this.coordTransfer.toVideoCoordinate(transCurCoords);
        curCoords.length = 0;
        curCoords.push(
          ...transformCoord({
            videoPoint: transCoords.data64F,
            videoWidth: this.videoWidth,
            videoHeight: this.videoHeight,
            originCoordsRightBottom: this.originCoordsRightBottom,
            originCoordsLeftTop: this.originCoordsLeftTop
          })
        );
      });
    });

    source.data = newData;

    this.map.addSource(id, source);
  }
  /**
   * @function GeojsonSource.prototype.remove
   * @description  移除数据源。