Add existing to tracked

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

@@ -0,0 +1,80 @@
+/**
+ * Indicates what happened the last time this tile was visited for selection.
+ * @private
+ */
+const TileSelectionResult = {
+  /**
+   * There was no selection result, perhaps because the tile wasn't visited
+   * last frame.
+   */
+  NONE: 0,
+
+  /**
+   * This tile was deemed not visible and culled.
+   */
+  CULLED: 1,
+
+  /**
+   * The tile was selected for rendering.
+   */
+  RENDERED: 2,
+
+  /**
+   * This tile did not meet the required screen-space error and was refined.
+   */
+  REFINED: 3,
+
+  /**
+   * This tile was originally rendered, but it got kicked out of the render list
+   * in favor of an ancestor because it is not yet renderable.
+   */
+  RENDERED_AND_KICKED: 2 | 4,
+
+  /**
+   * This tile was originally refined, but its rendered descendants got kicked out of the
+   * render list in favor of an ancestor because it is not yet renderable.
+   */
+  REFINED_AND_KICKED: 3 | 4,
+
+  /**
+   * This tile was culled because it was not visible, but it still needs to be loaded
+   * and any heights on it need to be updated because the camera's position or the
+   * camera's reference frame's origin falls inside this tile. Loading this tile
+   * could affect the position of the camera if the camera is currently below
+   * terrain or if it is tracking an object whose height is referenced to terrain.
+   * And a change in the camera position may, in turn, affect what is culled.
+   */
+  CULLED_BUT_NEEDED: 1 | 8,
+
+  /**
+   * Determines if a selection result indicates that this tile or its descendants were
+   * kicked from the render list. In other words, if it is <code>RENDERED_AND_KICKED</code>
+   * or <code>REFINED_AND_KICKED</code>.
+   *
+   * @param {TileSelectionResult} value The selection result to test.
+   * @returns {boolean} true if the tile was kicked, no matter if it was originally rendered or refined.
+   */
+  wasKicked: function (value) {
+    return value >= TileSelectionResult.RENDERED_AND_KICKED;
+  },
+
+  /**
+   * Determines the original selection result prior to being kicked or CULLED_BUT_NEEDED.
+   * If the tile wasn't kicked or CULLED_BUT_NEEDED, the original value is returned.
+   * @param {TileSelectionResult} value The selection result.
+   * @returns {TileSelectionResult} The original selection result prior to kicking.
+   */
+  originalResult: function (value) {
+    return value & 3;
+  },
+
+  /**
+   * Converts this selection result to a kick.
+   * @param {TileSelectionResult} value The original selection result.
+   * @returns {TileSelectionResult} The kicked form of the selection result.
+   */
+  kick: function (value) {
+    return value | 4;
+  },
+};
+export default TileSelectionResult;