初始提交: UE5.3项目基础框架

Plugins/CesiumForUnreal/Source/ThirdParty/include/CesiumGeometry/TileAvailabilityFlags.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "Library.h"
+
+#include <cstdint>
+
+namespace CesiumGeometry {
+
+/**
+ * @brief A bitmask representing the availability state of a tile.
+ */
+enum CESIUMGEOMETRY_API TileAvailabilityFlags {
+  /**
+   * @brief The tile is known to be available.
+   */
+  TILE_AVAILABLE = 1U,
+
+  /**
+   * @brief The tile's content is known to be available.
+   */
+  CONTENT_AVAILABLE = 2U,
+
+  /**
+   * @brief This tile has a subtree that is known to be available.
+   */
+  SUBTREE_AVAILABLE = 4U,
+
+  /**
+   * @brief This tile has a subtree that is loaded.
+   */
+  SUBTREE_LOADED = 8U,
+
+  // TODO: is REACHABLE needed? Reevaluate after implementation
+  /**
+   * @brief The tile is reachable through the tileset availability tree.
+   *
+   * If a tile is not reachable, the above flags being false may simply
+   * indicate that a subtree needed to reach this tile has not yet been loaded.
+   */
+  REACHABLE = 16U
+};
+
+} // namespace CesiumGeometry