itowns/lib/Source/OGC3DTilesIonSource.js

A JS/WebGL framework for 3D geospatial data visualization

import OGC3DTilesSource from "./OGC3DTilesSource.js";
class OGC3DTilesIonSource extends OGC3DTilesSource {
  /**
   * An object defining the source connection to a 3DTiles asset of a [Cesium ion server](https://cesium.com/learn/ion/).
   *
   * @extends Source
   *
   * @property {boolean} isOGC3DTilesIonSource - Used to check if this source is an OGC3DTilesIonSource. Set to true.
   * You should not change this, as it is used internally for optimisation.
   * @property {string} accessToken - The Cesium ion access token used to retrieve the resource.
   * @property {string} assetId - The id of the asset on Cesium ion.
   *
   * @param {Object} source An object that can contain all properties of an OGC3DTilesIonSource and {@link Source}.
   * Only `accessToken` and `assetId` are mandatory.
   * @param {string} source.accessToken - The Cesium ion access token used to retrieve the resource.
   * @param {string} source.assetId - The id of the asset on Cesium ion.
   */
  constructor(source) {
    if (!source.accessToken) {
      throw new Error('[OGC3DTilesIonSource]: accessToken is required');
    }
    if (!source.assetId) {
      throw new Error('[OGC3DTilesIonSource]: assetId is required');
    }

    // Url to query cesium ion the first time to retrieve metadata of the asset with assetId
    source.url = `https://api.cesium.com/v1/assets/${source.assetId}/endpoint?access_token=${source.accessToken}`;
    super(source);
    this.isOGC3DTilesIonSource = true;
    this.accessToken = source.accessToken;
    this.assetId = source.assetId;
  }
}
export default OGC3DTilesIonSource;