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diff --git a/libs/assimp/code/AssetLib/Ogre/OgreXmlSerializer.h b/libs/assimp/code/AssetLib/Ogre/OgreXmlSerializer.h
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+++ b/libs/assimp/code/AssetLib/Ogre/OgreXmlSerializer.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.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef AI_OGREXMLSERIALIZER_H_INC
+#define AI_OGREXMLSERIALIZER_H_INC
+
+#ifndef ASSIMP_BUILD_NO_OGRE_IMPORTER
+
+#include "OgreStructs.h"
+#include <assimp/XmlParser.h>
+
+namespace Assimp {
+
+namespace Ogre {
+
+using XmlParserPtr = std::shared_ptr<::Assimp::XmlParser> ;
+
+class OgreXmlSerializer {
+public:
+    /// Imports mesh and returns the result.
+    /// @note Fatal unrecoverable errors will throw a DeadlyImportError.
+    static MeshXml *ImportMesh(XmlParser *parser);
+
+    /// Imports skeleton to @c mesh.
+    /// If mesh does not have a skeleton reference or the skeleton file
+    /// cannot be found it is not a fatal DeadlyImportError.
+    /// @return If skeleton import was successful.
+    static bool ImportSkeleton(IOSystem *pIOHandler, MeshXml *mesh);
+    static bool ImportSkeleton(IOSystem *pIOHandler, Mesh *mesh);
+
+private:
+    explicit OgreXmlSerializer(XmlParser *xmlParser);
+
+    static XmlParserPtr OpenXmlParser(Assimp::IOSystem *pIOHandler, const std::string &filename);
+
+    // Mesh
+    void ReadMesh(MeshXml *mesh);
+    void ReadSubMesh(XmlNode &node, MeshXml *mesh);
+    void ReadGeometry(XmlNode &node, VertexDataXml *dest);
+    void ReadGeometryVertexBuffer(XmlNode &node, VertexDataXml *dest);
+    void ReadBoneAssignments(XmlNode &node, VertexDataXml *dest);
+
+    // Skeleton
+    void ReadSkeleton(XmlNode &node, Skeleton *skeleton);
+    void ReadBones(XmlNode &node, Skeleton *skeleton);
+    void ReadBoneHierarchy(XmlNode &node, Skeleton *skeleton);
+    void ReadAnimations(XmlNode &node, Skeleton *skeleton);
+    void ReadAnimationTracks(XmlNode &node, Animation *dest);
+    void ReadAnimationKeyFrames(XmlNode &node, Animation *anim, VertexAnimationTrack *dest);
+
+    template <typename T>
+    T ReadAttribute(XmlNode &xmlNode, const char *name) const;
+
+private:
+    XmlParser *mParser;
+};
+
+
+} // namespace Ogre
+} // namespace Assimp
+
+#endif // ASSIMP_BUILD_NO_OGRE_IMPORTER
+#endif // AI_OGREXMLSERIALIZER_H_INC