Add error if not loaded

CesiumGS · Aug 31, 2018 · d4c90e3 · d4c90e3
1 parent 90ee7cf
commit d4c90e3
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/Source/Scene/Cesium3DTileset.js b/Source/Scene/Cesium3DTileset.js
@@ -1247,13 +1247,21 @@ define([
          *
          * @memberof Cesium3DTileset.prototype
          *
+         * @exception {DeveloperError} The tileset is not loaded.  Use Cesium3DTileset.readyPromise or wait for Cesium3DTileset.ready to be true.
+         *
          * @type {*}
          * @readonly
          *
          * @see {@link https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/specification#specifying-extensions-and-application-specific-extras|Extras in the 3D Tiles specification.}
          */
         extras : {
             get : function() {
+                //>>includeStart('debug', pragmas.debug);
+                if (!this.ready) {
+                    throw new DeveloperError('The tileset is not loaded.  Use Cesium3DTileset.readyPromise or wait for Cesium3DTileset.ready to be true.');
+                }
+                //>>includeEnd('debug');
+
                 return this._extras;
             }
         }