Add existing to tracked

node_modules/@cesium/engine/Source/Scene/QuadtreeOccluders.js

@@ -0,0 +1,35 @@
+// @ts-check
+
+import Cartesian3 from "../Core/Cartesian3.js";
+import EllipsoidalOccluder from "../Core/EllipsoidalOccluder.js";
+
+/** @import Ellipsoid from "../Core/Ellipsoid.js"; */
+
+/**
+ * A set of occluders that can be used to test quadtree tiles for occlusion.
+ *
+ * @private
+ */
+class QuadtreeOccluders {
+  /**
+   * @param {object} [options]
+   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid that potentially occludes tiles.
+   */
+  constructor(options) {
+    this._ellipsoid = new EllipsoidalOccluder(
+      options.ellipsoid,
+      Cartesian3.ZERO,
+    );
+  }
+
+  /**
+   * Gets the {@link EllipsoidalOccluder} that can be used to determine if a point is
+   * occluded by an {@link Ellipsoid}.
+   * @type {EllipsoidalOccluder}
+   */
+  get ellipsoid() {
+    return this._ellipsoid;
+  }
+}
+
+export default QuadtreeOccluders;