初始提交: UE5.3项目基础框架

Plugins/CesiumForUnreal/Source/CesiumRuntime/Public/CesiumPropertyArray.h

@@ -0,0 +1,155 @@
+// Copyright 2020-2024 CesiumGS, Inc. and Contributors
+
+#pragma once
+
+#include "CesiumGltf/PropertyArrayView.h"
+#include "CesiumGltf/PropertyTypeTraits.h"
+#include "CesiumMetadataValueType.h"
+#include "UObject/ObjectMacros.h"
+#include <swl/variant.hpp>
+#include "CesiumPropertyArray.generated.h"
+
+/**
+ * A Blueprint-accessible wrapper for an array property in glTF metadata.
+ */
+USTRUCT(BlueprintType)
+struct CESIUMRUNTIME_API FCesiumPropertyArray {
+  GENERATED_USTRUCT_BODY()
+
+private:
+#pragma region ArrayType
+  template <typename T>
+  using ArrayPropertyView = CesiumGltf::PropertyArrayView<T>;
+
+  using ArrayType = swl::variant<
+      ArrayPropertyView<int8_t>,
+      ArrayPropertyView<uint8_t>,
+      ArrayPropertyView<int16_t>,
+      ArrayPropertyView<uint16_t>,
+      ArrayPropertyView<int32_t>,
+      ArrayPropertyView<uint32_t>,
+      ArrayPropertyView<int64_t>,
+      ArrayPropertyView<uint64_t>,
+      ArrayPropertyView<float>,
+      ArrayPropertyView<double>,
+      ArrayPropertyView<bool>,
+      ArrayPropertyView<std::string_view>,
+      ArrayPropertyView<glm::vec<2, int8_t>>,
+      ArrayPropertyView<glm::vec<2, uint8_t>>,
+      ArrayPropertyView<glm::vec<2, int16_t>>,
+      ArrayPropertyView<glm::vec<2, uint16_t>>,
+      ArrayPropertyView<glm::vec<2, int32_t>>,
+      ArrayPropertyView<glm::vec<2, uint32_t>>,
+      ArrayPropertyView<glm::vec<2, int64_t>>,
+      ArrayPropertyView<glm::vec<2, uint64_t>>,
+      ArrayPropertyView<glm::vec<2, float>>,
+      ArrayPropertyView<glm::vec<2, double>>,
+      ArrayPropertyView<glm::vec<3, int8_t>>,
+      ArrayPropertyView<glm::vec<3, uint8_t>>,
+      ArrayPropertyView<glm::vec<3, int16_t>>,
+      ArrayPropertyView<glm::vec<3, uint16_t>>,
+      ArrayPropertyView<glm::vec<3, int32_t>>,
+      ArrayPropertyView<glm::vec<3, uint32_t>>,
+      ArrayPropertyView<glm::vec<3, int64_t>>,
+      ArrayPropertyView<glm::vec<3, uint64_t>>,
+      ArrayPropertyView<glm::vec<3, float>>,
+      ArrayPropertyView<glm::vec<3, double>>,
+      ArrayPropertyView<glm::vec<4, int8_t>>,
+      ArrayPropertyView<glm::vec<4, uint8_t>>,
+      ArrayPropertyView<glm::vec<4, int16_t>>,
+      ArrayPropertyView<glm::vec<4, uint16_t>>,
+      ArrayPropertyView<glm::vec<4, int32_t>>,
+      ArrayPropertyView<glm::vec<4, uint32_t>>,
+      ArrayPropertyView<glm::vec<4, int64_t>>,
+      ArrayPropertyView<glm::vec<4, uint64_t>>,
+      ArrayPropertyView<glm::vec<4, float>>,
+      ArrayPropertyView<glm::vec<4, double>>,
+      ArrayPropertyView<glm::mat<2, 2, int8_t>>,
+      ArrayPropertyView<glm::mat<2, 2, uint8_t>>,
+      ArrayPropertyView<glm::mat<2, 2, int16_t>>,
+      ArrayPropertyView<glm::mat<2, 2, uint16_t>>,
+      ArrayPropertyView<glm::mat<2, 2, int32_t>>,
+      ArrayPropertyView<glm::mat<2, 2, uint32_t>>,
+      ArrayPropertyView<glm::mat<2, 2, int64_t>>,
+      ArrayPropertyView<glm::mat<2, 2, uint64_t>>,
+      ArrayPropertyView<glm::mat<2, 2, float>>,
+      ArrayPropertyView<glm::mat<2, 2, double>>,
+      ArrayPropertyView<glm::mat<3, 3, int8_t>>,
+      ArrayPropertyView<glm::mat<3, 3, uint8_t>>,
+      ArrayPropertyView<glm::mat<3, 3, int16_t>>,
+      ArrayPropertyView<glm::mat<3, 3, uint16_t>>,
+      ArrayPropertyView<glm::mat<3, 3, int32_t>>,
+      ArrayPropertyView<glm::mat<3, 3, uint32_t>>,
+      ArrayPropertyView<glm::mat<3, 3, int64_t>>,
+      ArrayPropertyView<glm::mat<3, 3, uint64_t>>,
+      ArrayPropertyView<glm::mat<3, 3, float>>,
+      ArrayPropertyView<glm::mat<3, 3, double>>,
+      ArrayPropertyView<glm::mat<4, 4, int8_t>>,
+      ArrayPropertyView<glm::mat<4, 4, uint8_t>>,
+      ArrayPropertyView<glm::mat<4, 4, int16_t>>,
+      ArrayPropertyView<glm::mat<4, 4, uint16_t>>,
+      ArrayPropertyView<glm::mat<4, 4, int32_t>>,
+      ArrayPropertyView<glm::mat<4, 4, uint32_t>>,
+      ArrayPropertyView<glm::mat<4, 4, int64_t>>,
+      ArrayPropertyView<glm::mat<4, 4, uint64_t>>,
+      ArrayPropertyView<glm::mat<4, 4, float>>,
+      ArrayPropertyView<glm::mat<4, 4, double>>>;
+#pragma endregion
+
+public:
+  /**
+   * Constructs an empty array instance with an unknown element type.
+   */
+  FCesiumPropertyArray() : _value(), _elementType() {}
+
+  /**
+   * Constructs an array instance.
+   * @param value The property array view that will be stored in this struct
+   */
+  template <typename T>
+  FCesiumPropertyArray(CesiumGltf::PropertyArrayCopy<T>&& value)
+      : _value(), _elementType(), _storage() {
+    this->_value = std::move(value).toViewAndExternalBuffer(this->_storage);
+    ECesiumMetadataType type =
+        ECesiumMetadataType(CesiumGltf::TypeToPropertyType<T>::value);
+    ECesiumMetadataComponentType componentType = ECesiumMetadataComponentType(
+        CesiumGltf::TypeToPropertyType<T>::component);
+    bool isArray = false;
+
+    _elementType = {type, componentType, isArray};
+  }
+
+  template <typename T>
+  FCesiumPropertyArray(const CesiumGltf::PropertyArrayCopy<T>& value)
+      : FCesiumPropertyArray(CesiumGltf::PropertyArrayCopy<T>(value)) {}
+
+  template <typename T>
+  FCesiumPropertyArray(const CesiumGltf::PropertyArrayView<T>& value)
+      : _value(value), _elementType() {
+    ECesiumMetadataType type =
+        ECesiumMetadataType(CesiumGltf::TypeToPropertyType<T>::value);
+    ECesiumMetadataComponentType componentType = ECesiumMetadataComponentType(
+        CesiumGltf::TypeToPropertyType<T>::component);
+    bool isArray = false;
+
+    _elementType = {type, componentType, isArray};
+  }
+
+  FCesiumPropertyArray(FCesiumPropertyArray&& rhs);
+  FCesiumPropertyArray& operator=(FCesiumPropertyArray&& rhs);
+  FCesiumPropertyArray(const FCesiumPropertyArray& rhs);
+  FCesiumPropertyArray& operator=(const FCesiumPropertyArray& rhs);
+
+private:
+  template <typename T, typename... VariantType>
+  static bool
+  holdsArrayAlternative(const swl::variant<VariantType...>& variant) {
+    return swl::holds_alternative<CesiumGltf::PropertyArrayView<T>>(variant);
+  }
+
+  ArrayType _value;
+  FCesiumMetadataValueType _elementType;
+  std::vector<std::byte> _storage;
+
+  friend class UCesiumPropertyArrayBlueprintLibrary;
+};