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diff --git a/src/mesh/assimp-master/code/AssetLib/Unreal/UnrealLoader.h b/src/mesh/assimp-master/code/AssetLib/Unreal/UnrealLoader.h
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+++ b/src/mesh/assimp-master/code/AssetLib/Unreal/UnrealLoader.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  UnrealLoader.h
+ *  @brief Declaration of the .3d (UNREAL) importer class.
+ */
+#ifndef INCLUDED_AI_3D_LOADER_H
+#define INCLUDED_AI_3D_LOADER_H
+
+#include <assimp/BaseImporter.h>
+
+namespace Assimp {
+
+// ---------------------------------------------------------------------------
+/**
+ *  @brief Importer class to load UNREAL files (*.3d)
+ */
+class UnrealImporter : public BaseImporter {
+public:
+    UnrealImporter();
+    ~UnrealImporter();
+
+    // -------------------------------------------------------------------
+    /** @brief Returns whether we can handle the format of the given file
+     *
+     *  See BaseImporter::CanRead() for details.
+     **/
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
+
+protected:
+    // -------------------------------------------------------------------
+    /** @brief Called by Importer::GetExtensionList()
+     *
+     * @see #BaseImporter::GetInfo for the details
+     */
+    const aiImporterDesc *GetInfo() const override;
+
+    // -------------------------------------------------------------------
+    /** @brief Setup properties for the importer
+     *
+     * See BaseImporter::SetupProperties() for details
+     */
+    void SetupProperties(const Importer *pImp) override;
+
+    // -------------------------------------------------------------------
+    /** @brief Imports the given file into the given scene structure.
+     *
+     * See BaseImporter::InternReadFile() for details
+     */
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
+
+private:
+    //! frame to be loaded
+    uint32_t mConfigFrameID;
+
+    //! process surface flags
+    bool mConfigHandleFlags;
+
+}; // !class UnrealImporter
+
+} // end of namespace Assimp
+
+#endif // AI_UNREALIMPORTER_H_INC