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diff --git a/libs/assimp/code/AssetLib/B3D/B3DImporter.h b/libs/assimp/code/AssetLib/B3D/B3DImporter.h
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+++ b/libs/assimp/code/AssetLib/B3D/B3DImporter.h
@@ -0,0 +1,132 @@
+/*
+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 Definition of the .b3d importer class.
+ */
+#pragma once
+#ifndef AI_B3DIMPORTER_H_INC
+#define AI_B3DIMPORTER_H_INC
+
+#include <assimp/types.h>
+#include <assimp/mesh.h>
+#include <assimp/material.h>
+#include <assimp/BaseImporter.h>
+
+#include <memory>
+#include <vector>
+
+struct aiNodeAnim;
+struct aiNode;
+struct aiAnimation;
+
+namespace Assimp{
+
+class B3DImporter : public BaseImporter{
+public:
+    B3DImporter() = default;
+    ~B3DImporter() override;
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const override;
+
+protected:
+    const aiImporterDesc* GetInfo () const override;
+    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
+
+private:
+
+    int ReadByte();
+    int ReadInt();
+    float ReadFloat();
+    aiVector2D ReadVec2();
+    aiVector3D ReadVec3();
+    aiQuaternion ReadQuat();
+    std::string ReadString();
+    std::string ReadChunk();
+    void ExitChunk();
+    size_t ChunkSize();
+
+    template<class T>
+    T *to_array( const std::vector<T> &v );
+
+    struct Vertex{
+        aiVector3D vertex;
+        aiVector3D normal;
+        aiVector3D texcoords;
+        unsigned char bones[4];
+        float weights[4];
+    };
+
+    AI_WONT_RETURN void Oops() AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN void Fail(const std::string &str) AI_WONT_RETURN_SUFFIX;
+
+    void ReadTEXS();
+    void ReadBRUS();
+
+    void ReadVRTS();
+    void ReadTRIS( int v0 );
+    void ReadMESH();
+    void ReadBONE( int id );
+    void ReadKEYS( aiNodeAnim *nodeAnim );
+    void ReadANIM();
+
+    aiNode *ReadNODE( aiNode *parent );
+
+    void ReadBB3D( aiScene *scene );
+
+    size_t _pos;
+    std::vector<unsigned char> _buf;
+    std::vector<size_t> _stack;
+
+    std::vector<std::string> _textures;
+    std::vector<std::unique_ptr<aiMaterial> > _materials;
+
+    int _vflags,_tcsets,_tcsize;
+    std::vector<Vertex> _vertices;
+
+    std::vector<aiNode*> _nodes;
+    std::vector<std::unique_ptr<aiMesh> > _meshes;
+    std::vector<std::unique_ptr<aiNodeAnim> > _nodeAnims;
+    std::vector<std::unique_ptr<aiAnimation> > _animations;
+};
+
+}
+
+#endif