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diff --git a/libs/assimp/code/AssetLib/C4D/C4DImporter.h b/libs/assimp/code/AssetLib/C4D/C4DImporter.h
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+++ b/libs/assimp/code/AssetLib/C4D/C4DImporter.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2021, 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  C4DImporter.h
+ *  @brief Declaration of the Cinema4D (*.c4d) importer class.
+ */
+#ifndef INCLUDED_AI_CINEMA_4D_LOADER_H
+#define INCLUDED_AI_CINEMA_4D_LOADER_H
+
+#include <assimp/BaseImporter.h>
+#include <assimp/LogAux.h>
+
+#include <map>
+
+// Forward declarations
+struct aiNode;
+struct aiMesh;
+struct aiMaterial;
+
+struct aiImporterDesc;
+
+namespace cineware {
+    class BaseObject;
+    class PolygonObject;
+    class BaseMaterial;
+    class BaseShader;
+}
+
+namespace Assimp  {
+    // TinyFormatter.h
+    namespace Formatter {
+        template <typename T,typename TR, typename A> class basic_formatter;
+        typedef class basic_formatter< char, std::char_traits<char>, std::allocator<char> > format;
+    }
+
+// -------------------------------------------------------------------------------------------
+/** Importer class to load Cinema4D files using the Cineware library to be obtained from
+ *  https://developers.maxon.net
+ *
+ *  Note that Cineware is not free software. */
+// -------------------------------------------------------------------------------------------
+class C4DImporter : public BaseImporter, public LogFunctions<C4DImporter> {
+public:
+    bool CanRead( const std::string& pFile, IOSystem*, bool checkSig) const override;
+
+protected:
+
+    const aiImporterDesc* GetInfo () const override;
+
+    void InternReadFile( const std::string& pFile, aiScene*, IOSystem* ) override;
+
+private:
+
+    void ReadMaterials(cineware::BaseMaterial* mat);
+    void RecurseHierarchy(cineware::BaseObject* object, aiNode* parent);
+    aiMesh* ReadMesh(cineware::BaseObject* object);
+    unsigned int ResolveMaterial(cineware::PolygonObject* obj);
+
+    bool ReadShader(aiMaterial* out, cineware::BaseShader* shader);
+
+    std::vector<aiMesh*> meshes;
+    std::vector<aiMaterial*> materials;
+
+    typedef std::map<cineware::BaseMaterial*, unsigned int> MaterialMap;
+    MaterialMap material_mapping;
+
+}; // !class C4DImporter
+
+} // end of namespace Assimp
+
+#endif // INCLUDED_AI_CINEMA_4D_LOADER_H