初始提交: UE5.3项目基础框架

Plugins/CesiumForUnreal/Source/ThirdParty/include/Cesium3DTilesSelection/TilesetMetadata.h

@@ -0,0 +1,77 @@
+#pragma once
+
+#include "Library.h"
+
+#include <Cesium3DTiles/GroupMetadata.h>
+#include <Cesium3DTiles/Schema.h>
+#include <CesiumAsync/SharedFuture.h>
+
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace CesiumAsync {
+class AsyncSystem;
+class IAssetAccessor;
+} // namespace CesiumAsync
+
+namespace Cesium3DTilesSelection {
+
+/**
+ * @brief Holds the metadata associated with a {@link Tileset} or an external
+ * tileset.
+ */
+class CESIUM3DTILESSELECTION_API TilesetMetadata {
+public:
+  ~TilesetMetadata() noexcept;
+
+  /**
+   * @brief An object defining the structure of metadata classes and enums. When
+   * this is defined, then `schemaUri` shall be undefined.
+   */
+  std::optional<Cesium3DTiles::Schema> schema;
+
+  /**
+   * @brief The URI (or IRI) of the external schema file. When this is defined,
+   * then `schema` shall be undefined.
+   */
+  std::optional<std::string> schemaUri;
+
+  /**
+   * @brief An array of groups that tile content may belong to. Each element of
+   * this array is a metadata entity that describes the group. The tile content
+   * `group` property is an index into this array.
+   */
+  std::vector<Cesium3DTiles::GroupMetadata> groups;
+
+  /**
+   * @brief A metadata entity that is associated with this tileset.
+   */
+  std::optional<Cesium3DTiles::MetadataEntity> metadata;
+
+  /**
+   * @brief Asynchronously loads the {@link schema} from the {@link schemaUri}.
+   * If the {@link schemaUri} does not contain a value, this method does
+   * nothing and returns an already-resolved future.
+   *
+   * Calling this method multiple times will return the same shared future each
+   * time, unless the {@link schemaUri} is changed. In that case, when this
+   * method is called, the previous load is canceled and the new one begins.
+   *
+   * @param asyncSystem The async system used to do work in threads.
+   * @param pAssetAccessor The asset accessor used to request the schema from
+   * the schemaUri.
+   * @return A future that resolves when the schema has been loaded from the
+   * schemaUri.
+   */
+  CesiumAsync::SharedFuture<void>& loadSchemaUri(
+      const CesiumAsync::AsyncSystem& asyncSystem,
+      const std::shared_ptr<CesiumAsync::IAssetAccessor>& pAssetAccessor);
+
+private:
+  std::optional<CesiumAsync::SharedFuture<void>> _loadingFuture;
+  std::optional<std::string> _loadingSchemaUri;
+  std::shared_ptr<bool> _pLoadingCanceled;
+};
+
+} // namespace Cesium3DTilesSelection