diff --git a/code/AssetLib/3DS/3DSExporter.cpp b/code/AssetLib/3DS/3DSExporter.cpp
index 0beecd563..d1059ae43 100644
--- a/code/AssetLib/3DS/3DSExporter.cpp
+++ b/code/AssetLib/3DS/3DSExporter.cpp
@@ -56,8 +56,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <memory>
 
-using namespace Assimp;
 namespace Assimp {
+
 using namespace D3DS;
 
 namespace {
diff --git a/code/AssetLib/3DS/3DSHelper.h b/code/AssetLib/3DS/3DSHelper.h
index e8efbf949..933795f65 100644
--- a/code/AssetLib/3DS/3DSHelper.h
+++ b/code/AssetLib/3DS/3DSHelper.h
@@ -53,7 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/light.h>
 #include <assimp/material.h>
 #include <assimp/qnan.h>
-#include <stdio.h> //sprintf
+#include <cstdio> //sprintf
 
 namespace Assimp {
 namespace D3DS {
diff --git a/code/AssetLib/3DS/3DSLoader.h b/code/AssetLib/3DS/3DSLoader.h
index 04dcac237..bd167872f 100644
--- a/code/AssetLib/3DS/3DSLoader.h
+++ b/code/AssetLib/3DS/3DSLoader.h
@@ -46,11 +46,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifndef AI_3DSIMPORTER_H_INC
 #define AI_3DSIMPORTER_H_INC
+#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER
 
 #include <assimp/BaseImporter.h>
 #include <assimp/types.h>
 
-#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER
 
 #include "3DSHelper.h"
 #include <assimp/StreamReader.h>
@@ -75,14 +75,14 @@ public:
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
      * The function is a request to the importer to update its configuration
      * basing on the Importer's configuration property list.
      */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer* pImp) override;
 
 protected:
 
@@ -90,14 +90,14 @@ protected:
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details
      */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Converts a temporary material to the outer representation
diff --git a/code/AssetLib/3MF/D3MFExporter.h b/code/AssetLib/3MF/D3MFExporter.h
index d2fc82483..3da74fb37 100644
--- a/code/AssetLib/3MF/D3MFExporter.h
+++ b/code/AssetLib/3MF/D3MFExporter.h
@@ -40,6 +40,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #pragma once
 
+#ifndef ASSIMP_BUILD_NO_EXPORT
+#ifndef ASSIMP_BUILD_NO_3MF_EXPORTER
+
 #include <memory>
 #include <sstream>
 #include <vector>
@@ -58,8 +61,6 @@ class IOStream;
 
 namespace D3MF {
 
-#ifndef ASSIMP_BUILD_NO_EXPORT
-#ifndef ASSIMP_BUILD_NO_3MF_EXPORTER
 
 struct OpcPackageRelationship;
 
diff --git a/code/AssetLib/3MF/D3MFImporter.h b/code/AssetLib/3MF/D3MFImporter.h
index 2b37010d9..7219fa39d 100644
--- a/code/AssetLib/3MF/D3MFImporter.h
+++ b/code/AssetLib/3MF/D3MFImporter.h
@@ -42,6 +42,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_D3MFLOADER_H_INCLUDED
 #define AI_D3MFLOADER_H_INCLUDED
 
+#ifndef ASSIMP_BUILD_NO_3MF_IMPORTER
+
 #include <assimp/BaseImporter.h>
 
 namespace Assimp {
@@ -84,4 +86,6 @@ protected:
 
 } // Namespace Assimp
 
+#endif // #ifndef ASSIMP_BUILD_NO_3MF_IMPORTER
+
 #endif // AI_D3MFLOADER_H_INCLUDED
diff --git a/code/AssetLib/3MF/D3MFOpcPackage.cpp b/code/AssetLib/3MF/D3MFOpcPackage.cpp
index c29cec368..ac5b91e67 100644
--- a/code/AssetLib/3MF/D3MFOpcPackage.cpp
+++ b/code/AssetLib/3MF/D3MFOpcPackage.cpp
@@ -51,11 +51,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/IOSystem.hpp>
 #include <assimp/texture.h>
 #include "3MFXmlTags.h"
+
 #include <algorithm>
 #include <cassert>
 #include <cstdlib>
 #include <map>
-#include <memory>
 #include <vector>
 
 namespace Assimp {
@@ -186,7 +186,6 @@ D3MFOpcPackage::D3MFOpcPackage(IOSystem *pIOHandler, const std::string &rFile) :
 D3MFOpcPackage::~D3MFOpcPackage() {
     mZipArchive->Close(mRootStream);
     delete mZipArchive;
-    mZipArchive = nullptr;
 }
 
 IOStream *D3MFOpcPackage::RootStream() const {
diff --git a/code/AssetLib/3MF/D3MFOpcPackage.h b/code/AssetLib/3MF/D3MFOpcPackage.h
index fda74a879..27bf44ff2 100644
--- a/code/AssetLib/3MF/D3MFOpcPackage.h
+++ b/code/AssetLib/3MF/D3MFOpcPackage.h
@@ -42,9 +42,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef D3MFOPCPACKAGE_H
 #define D3MFOPCPACKAGE_H
 
+#include <assimp/IOSystem.hpp>
 #include <memory>
 #include <string>
-#include <assimp/IOSystem.hpp>
 
 struct aiTexture;
 
diff --git a/code/AssetLib/AC/ACLoader.h b/code/AssetLib/AC/ACLoader.h
index 5ae2e80bb..5b706a4a0 100644
--- a/code/AssetLib/AC/ACLoader.h
+++ b/code/AssetLib/AC/ACLoader.h
@@ -63,7 +63,7 @@ namespace Assimp {
 class AC3DImporter : public BaseImporter {
 public:
     AC3DImporter();
-    ~AC3DImporter();
+    ~AC3DImporter() override;
 
     // Represents an AC3D material
     struct Material {
@@ -185,25 +185,25 @@ public:
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details*/
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.*/
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 private:
     // -------------------------------------------------------------------
diff --git a/code/AssetLib/AMF/AMFImporter.hpp b/code/AssetLib/AMF/AMFImporter.hpp
index 18ef83c24..a71b6671e 100644
--- a/code/AssetLib/AMF/AMFImporter.hpp
+++ b/code/AssetLib/AMF/AMFImporter.hpp
@@ -267,7 +267,7 @@ public:
     AMFImporter() AI_NO_EXCEPT;
 
     /// Default destructor.
-    ~AMFImporter();
+    ~AMFImporter() override;
 
     /// Parse AMF file and fill scene graph. The function has no return value. Result can be found by analyzing the generated graph.
     /// Also exception can be thrown if trouble will found.
@@ -276,9 +276,9 @@ public:
     void ParseFile(const std::string &pFile, IOSystem *pIOHandler);
     void ParseHelper_Node_Enter(AMFNodeElementBase *child);
     void ParseHelper_Node_Exit();
-    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool pCheckSig) const;
-    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler);
-    const aiImporterDesc *GetInfo() const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool pCheckSig) const override;
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
+    const aiImporterDesc *GetInfo() const override;
     bool Find_NodeElement(const std::string &pID, const AMFNodeElementBase::EType pType, AMFNodeElementBase **pNodeElement) const;
     bool Find_ConvertedNode(const std::string &pID, NodeArray &nodeArray, aiNode **pNode) const;
     bool Find_ConvertedMaterial(const std::string &pID, const SPP_Material **pConvertedMaterial) const;
diff --git a/code/AssetLib/AMF/AMFImporter_Node.hpp b/code/AssetLib/AMF/AMFImporter_Node.hpp
index 9051b2871..b466e339b 100644
--- a/code/AssetLib/AMF/AMFImporter_Node.hpp
+++ b/code/AssetLib/AMF/AMFImporter_Node.hpp
@@ -48,15 +48,14 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef INCLUDED_AI_AMF_IMPORTER_NODE_H
 #define INCLUDED_AI_AMF_IMPORTER_NODE_H
 
-// Header files, stdlib.
+// Header files, Assimp.
+#include <assimp/scene.h>
+#include <assimp/types.h>
+
 #include <list>
 #include <string>
 #include <vector>
 
-// Header files, Assimp.
-#include "assimp/scene.h"
-#include "assimp/types.h"
-
 /// \class CAMFImporter_NodeElement
 /// Base class for elements of nodes.
 class AMFNodeElementBase {
diff --git a/code/AssetLib/ASE/ASELoader.cpp b/code/AssetLib/ASE/ASELoader.cpp
index f5fecc92d..2be103321 100644
--- a/code/AssetLib/ASE/ASELoader.cpp
+++ b/code/AssetLib/ASE/ASELoader.cpp
@@ -5,8 +5,6 @@ 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,
diff --git a/code/AssetLib/ASE/ASELoader.h b/code/AssetLib/ASE/ASELoader.h
index 1f30d28e7..9ec9d439f 100644
--- a/code/AssetLib/ASE/ASELoader.h
+++ b/code/AssetLib/ASE/ASELoader.h
@@ -62,42 +62,37 @@ namespace Assimp {
 class ASEImporter : public BaseImporter {
 public:
     ASEImporter();
-    ~ASEImporter();
+    ~ASEImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
-
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
+        IOSystem* pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
-
+    void SetupProperties(const Importer* pImp) override;
 
 private:
-
     // -------------------------------------------------------------------
     /** Generate normal vectors basing on smoothing groups
      * (in some cases the normal are already contained in the file)
@@ -106,7 +101,6 @@ private:
      */
     bool GenerateNormals(ASE::Mesh& mesh);
 
-
     // -------------------------------------------------------------------
     /** Create valid vertex/normal/UV/color/face lists.
      *  All elements are unique, faces have only one set of indices
@@ -115,51 +109,43 @@ private:
      */
     void BuildUniqueRepresentation(ASE::Mesh& mesh);
 
-
     /** Create one-material-per-mesh meshes ;-)
      * \param mesh Mesh to work with
      *  \param Receives the list of all created meshes
      */
     void ConvertMeshes(ASE::Mesh& mesh, std::vector<aiMesh*>& avOut);
 
-
     // -------------------------------------------------------------------
     /** Convert a material to a aiMaterial object
      * \param mat Input material
      */
     void ConvertMaterial(ASE::Material& mat);
 
-
     // -------------------------------------------------------------------
     /** Setup the final material indices for each mesh
      */
     void BuildMaterialIndices();
 
-
     // -------------------------------------------------------------------
     /** Build the node graph
      */
     void BuildNodes(std::vector<ASE::BaseNode*>& nodes);
 
-
     // -------------------------------------------------------------------
     /** Build output cameras
      */
     void BuildCameras();
 
-
     // -------------------------------------------------------------------
     /** Build output lights
      */
     void BuildLights();
 
-
     // -------------------------------------------------------------------
     /** Build output animations
      */
     void BuildAnimations(const std::vector<ASE::BaseNode*>& nodes);
 
-
     // -------------------------------------------------------------------
     /** Add sub nodes to a node
      *  \param pcParent parent node to be filled
@@ -183,7 +169,6 @@ private:
     void GenerateDefaultMaterial();
 
 protected:
-
     /** Parser instance */
     ASE::Parser* mParser;
 
diff --git a/code/AssetLib/ASE/ASEParser.cpp b/code/AssetLib/ASE/ASEParser.cpp
index 1f7018b11..a2884b8dd 100644
--- a/code/AssetLib/ASE/ASEParser.cpp
+++ b/code/AssetLib/ASE/ASEParser.cpp
@@ -5,8 +5,6 @@ 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,
diff --git a/code/AssetLib/Assbin/AssbinExporter.h b/code/AssetLib/Assbin/AssbinExporter.h
index 96dfdd1c2..4871b5021 100644
--- a/code/AssetLib/Assbin/AssbinExporter.h
+++ b/code/AssetLib/Assbin/AssbinExporter.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file AssbinExporter.h
  * ASSBIN Exporter Main Header
  */
+#pragma once
 #ifndef AI_ASSBINEXPORTER_H_INC
 #define AI_ASSBINEXPORTER_H_INC
 
diff --git a/code/AssetLib/Assbin/AssbinLoader.h b/code/AssetLib/Assbin/AssbinLoader.h
index 59d799a3d..47f38db2a 100644
--- a/code/AssetLib/Assbin/AssbinLoader.h
+++ b/code/AssetLib/Assbin/AssbinLoader.h
@@ -5,7 +5,6 @@ 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,
@@ -74,17 +73,11 @@ private:
     bool compressed;
 
 public:
-    virtual bool CanRead(
-        const std::string& pFile,
-        IOSystem* pIOHandler,
-        bool checkSig
-    ) const;
-    virtual const aiImporterDesc* GetInfo() const;
-    virtual void InternReadFile(
-    const std::string& pFile,
-        aiScene* pScene,
-        IOSystem* pIOHandler
-    );
+    bool CanRead(const std::string& pFile,
+        IOSystem* pIOHandler, bool checkSig) const override;
+    const aiImporterDesc* GetInfo() const override;
+    void InternReadFile(
+    const std::string& pFile,aiScene* pScene,IOSystem* pIOHandler) override;
     void ReadHeader();
     void ReadBinaryScene( IOStream * stream, aiScene* pScene );
     void ReadBinaryNode( IOStream * stream, aiNode** mRootNode, aiNode* parent );
diff --git a/code/AssetLib/Assjson/mesh_splitter.cpp b/code/AssetLib/Assjson/mesh_splitter.cpp
index 9301cc27e..978437c41 100644
--- a/code/AssetLib/Assjson/mesh_splitter.cpp
+++ b/code/AssetLib/Assjson/mesh_splitter.cpp
@@ -69,13 +69,12 @@ void MeshSplitter::UpdateNode(aiNode* pcNode, const std::vector<std::pair<aiMesh
 	for (unsigned int i = 0, end = pcNode->mNumChildren; i < end;++i)	{
 		UpdateNode ( pcNode->mChildren[i], source_mesh_map );
 	}
-	return;
 }
 
-#define WAS_NOT_COPIED 0xffffffff
+static const unsigned int WAS_NOT_COPIED = 0xffffffff;
 
-typedef std::pair <unsigned int,float> PerVertexWeight;
-typedef std::vector	<PerVertexWeight> VertexWeightTable;
+using PerVertexWeight = std::pair <unsigned int,float>;
+using VertexWeightTable = std::vector	<PerVertexWeight>;
 
 // ------------------------------------------------------------------------------------------------
 VertexWeightTable* ComputeVertexBoneWeightTable(const aiMesh* pMesh) {
@@ -89,7 +88,7 @@ VertexWeightTable* ComputeVertexBoneWeightTable(const aiMesh* pMesh) {
 		aiBone* bone = pMesh->mBones[i];
 		for (unsigned int a = 0; a < bone->mNumWeights;++a)	{
 			const aiVertexWeight& weight = bone->mWeights[a];
-			avPerVertexWeights[weight.mVertexId].push_back( std::make_pair(i,weight.mWeight) );
+			avPerVertexWeights[weight.mVertexId].emplace_back(i,weight.mWeight);
 		}
 	}
 	return avPerVertexWeights;
@@ -100,7 +99,7 @@ void MeshSplitter :: SplitMesh(unsigned int a, aiMesh* in_mesh, std::vector<std:
 	// TODO: should better use std::(multi)set for source_mesh_map.
 
 	if (in_mesh->mNumVertices <= LIMIT)	{
-		source_mesh_map.push_back(std::make_pair(in_mesh,a));
+		source_mesh_map.emplace_back(in_mesh,a);
 		return;
 	}
 
@@ -187,7 +186,7 @@ void MeshSplitter :: SplitMesh(unsigned int a, aiMesh* in_mesh, std::vector<std:
 				break;
 			}
 
-			vFaces.push_back(aiFace());
+			vFaces.emplace_back();
 			aiFace& rFace = vFaces.back();
 
 			// setup face type and number of indices
diff --git a/code/AssetLib/Assjson/mesh_splitter.h b/code/AssetLib/Assjson/mesh_splitter.h
index 3bb26118a..f7f9a9326 100644
--- a/code/AssetLib/Assjson/mesh_splitter.h
+++ b/code/AssetLib/Assjson/mesh_splitter.h
@@ -24,38 +24,29 @@ struct aiNode;
 /** Splits meshes of unique vertices into meshes with no more vertices than
  *  a given, configurable threshold value.
  */
-class MeshSplitter
-{
-
+class MeshSplitter {
 public:
+    unsigned int LIMIT;
 
-	void SetLimit(unsigned int l) {
-		LIMIT = l;
-	}
+    void SetLimit(unsigned int l) {
+        LIMIT = l;
+    }
 
-	unsigned int GetLimit() const {
-		return LIMIT;
-	}
+    unsigned int GetLimit() const {
+        return LIMIT;
+    }
 
-public:
-
-	// -------------------------------------------------------------------
-	/** Executes the post processing step on the given imported data.
+    // -------------------------------------------------------------------
+    /** Executes the post processing step on the given imported data.
 	 * At the moment a process is not supposed to fail.
 	 * @param pScene The imported data to work at.
 	 */
-	void Execute( aiScene* pScene);
-
+    void Execute(aiScene *pScene);
 
 private:
+    void UpdateNode(aiNode *pcNode, const std::vector<std::pair<aiMesh *, unsigned int>> &source_mesh_map);
+    void SplitMesh(unsigned int index, aiMesh *mesh, std::vector<std::pair<aiMesh *, unsigned int>> &source_mesh_map);
 
-	void UpdateNode(aiNode* pcNode, const std::vector<std::pair<aiMesh*, unsigned int> >& source_mesh_map);
-	void SplitMesh (unsigned int index, aiMesh* mesh, std::vector<std::pair<aiMesh*, unsigned int> >& source_mesh_map);
-
-public:
-
-	unsigned int LIMIT;
 };
 
 #endif // INCLUDED_MESH_SPLITTER
-
diff --git a/code/AssetLib/Assxml/AssxmlExporter.h b/code/AssetLib/Assxml/AssxmlExporter.h
index 5c7f155d1..9a3d1f9d5 100644
--- a/code/AssetLib/Assxml/AssxmlExporter.h
+++ b/code/AssetLib/Assxml/AssxmlExporter.h
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file AssxmlExporter.h
  * ASSXML Exporter Main Header
  */
+#pragma once
 #ifndef AI_ASSXMLEXPORTER_H_INC
 #define AI_ASSXMLEXPORTER_H_INC
 
diff --git a/code/AssetLib/Assxml/AssxmlFileWriter.h b/code/AssetLib/Assxml/AssxmlFileWriter.h
index e5f27095e..125869d1a 100644
--- a/code/AssetLib/Assxml/AssxmlFileWriter.h
+++ b/code/AssetLib/Assxml/AssxmlFileWriter.h
@@ -4,7 +4,6 @@ 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,
@@ -43,7 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file AssxmlFileWriter.h
  *  @brief Declaration of Assxml file writer.
  */
-
+#pragma once
 #ifndef AI_ASSXMLFILEWRITER_H_INC
 #define AI_ASSXMLFILEWRITER_H_INC
 
diff --git a/code/AssetLib/B3D/B3DImporter.h b/code/AssetLib/B3D/B3DImporter.h
index a7ed65c3b..bb535afd1 100644
--- a/code/AssetLib/B3D/B3DImporter.h
+++ b/code/AssetLib/B3D/B3DImporter.h
@@ -4,7 +4,6 @@ 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,
@@ -40,8 +39,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-/** @file Definition of the .b3d importer class. */
-
+/**
+ *  @file Definition of the .b3d importer class.
+ */
+#pragma once
 #ifndef AI_B3DIMPORTER_H_INC
 #define AI_B3DIMPORTER_H_INC
 
@@ -62,14 +63,12 @@ namespace Assimp{
 class B3DImporter : public BaseImporter{
 public:
     B3DImporter() = default;
-    virtual ~B3DImporter();
-
-    virtual bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const;
+    ~B3DImporter() override;
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const override;
 
 protected:
-
-    virtual const aiImporterDesc* GetInfo () const;
-    virtual void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler);
+    const aiImporterDesc* GetInfo () const override;
+    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
 
 private:
 
@@ -113,7 +112,6 @@ private:
     void ReadBB3D( aiScene *scene );
 
     size_t _pos;
-//  unsigned _size;
     std::vector<unsigned char> _buf;
     std::vector<size_t> _stack;
 
diff --git a/code/AssetLib/Blender/BlenderLoader.h b/code/AssetLib/Blender/BlenderLoader.h
index 42da76514..1df0fcf90 100644
--- a/code/AssetLib/Blender/BlenderLoader.h
+++ b/code/AssetLib/Blender/BlenderLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  BlenderLoader.h
  *  @brief Declaration of the Blender 3D (*.blend) importer class.
  */
+#pragma once
 #ifndef INCLUDED_AI_BLEND_LOADER_H
 #define INCLUDED_AI_BLEND_LOADER_H
 
@@ -56,149 +56,139 @@ struct aiLight;
 struct aiCamera;
 struct aiMaterial;
 
-namespace Assimp    {
+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;
-    }
+// TinyFormatter.h
+namespace Formatter {
 
-    // BlenderDNA.h
-    namespace Blender {
-        class  FileDatabase;
-        struct ElemBase;
-    }
+template <typename T, typename TR, typename A>
+class basic_formatter;
 
-    // BlenderScene.h
-    namespace Blender {
-        struct Scene;
-        struct Object;
-        struct Mesh;
-        struct Camera;
-        struct Lamp;
-        struct MTex;
-        struct Image;
-        struct Material;
-    }
+typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>> format;
 
-    // BlenderIntermediate.h
-    namespace Blender {
-        struct ConversionData;
-        template <template <typename,typename> class TCLASS, typename T> struct TempArray;
-    }
+} // namespace Formatter
 
-    // BlenderModifier.h
-    namespace Blender {
-        class BlenderModifierShowcase;
-        class BlenderModifier;
-    }
+// BlenderDNA.h
+namespace Blender {
+class FileDatabase;
+struct ElemBase;
+} // namespace Blender
 
+// BlenderScene.h
+namespace Blender {
+struct Scene;
+struct Object;
+struct Mesh;
+struct Camera;
+struct Lamp;
+struct MTex;
+struct Image;
+struct Material;
+} // namespace Blender
 
+// BlenderIntermediate.h
+namespace Blender {
+struct ConversionData;
+template <template <typename, typename> class TCLASS, typename T>
+struct TempArray;
+} // namespace Blender
+
+// BlenderModifier.h
+namespace Blender {
+class BlenderModifierShowcase;
+class BlenderModifier;
+} // namespace Blender
 
 // -------------------------------------------------------------------------------------------
 /** Load blenders official binary format. The actual file structure (the `DNA` how they
  *  call it is outsourced to BlenderDNA.cpp/BlenderDNA.h. This class only performs the
  *  conversion from intermediate format to aiScene. */
 // -------------------------------------------------------------------------------------------
-class BlenderImporter : public BaseImporter, public LogFunctions<BlenderImporter>
-{
+class BlenderImporter : public BaseImporter, public LogFunctions<BlenderImporter> {
 public:
     BlenderImporter();
-    ~BlenderImporter();
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const;
+    ~BlenderImporter() override;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
 
 protected:
-    const aiImporterDesc* GetInfo () const;
-    void SetupProperties(const Importer* pImp);
-    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler);
-    void ParseBlendFile(Blender::FileDatabase& out, std::shared_ptr<IOStream> stream);
-    void ExtractScene(Blender::Scene& out, const Blender::FileDatabase& file);
-    void ConvertBlendFile(aiScene* out, const Blender::Scene& in, const Blender::FileDatabase& file);
+    const aiImporterDesc *GetInfo() const override;
+    void SetupProperties(const Importer *pImp) override;
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
+    void ParseBlendFile(Blender::FileDatabase &out, std::shared_ptr<IOStream> stream);
+    void ExtractScene(Blender::Scene &out, const Blender::FileDatabase &file);
+    void ConvertBlendFile(aiScene *out, const Blender::Scene &in, const Blender::FileDatabase &file);
 
 private:
-    aiNode* ConvertNode(const Blender::Scene& in,
-        const Blender::Object* obj,
-        Blender::ConversionData& conv_info,
-        const aiMatrix4x4& parentTransform
-    );
+    aiNode *ConvertNode(const Blender::Scene &in,
+            const Blender::Object *obj,
+            Blender::ConversionData &conv_info,
+            const aiMatrix4x4 &parentTransform);
 
     // --------------------
-    void ConvertMesh(const Blender::Scene& in,
-        const Blender::Object* obj,
-        const Blender::Mesh* mesh,
-        Blender::ConversionData& conv_data,
-        Blender::TempArray<std::vector,aiMesh>& temp
-    );
+    void ConvertMesh(const Blender::Scene &in,
+            const Blender::Object *obj,
+            const Blender::Mesh *mesh,
+            Blender::ConversionData &conv_data,
+            Blender::TempArray<std::vector, aiMesh> &temp);
 
     // --------------------
-    aiLight* ConvertLight(const Blender::Scene& in,
-        const Blender::Object* obj,
-        const Blender::Lamp* mesh,
-        Blender::ConversionData& conv_data
-    );
+    aiLight *ConvertLight(const Blender::Scene &in,
+            const Blender::Object *obj,
+            const Blender::Lamp *mesh,
+            Blender::ConversionData &conv_data);
 
     // --------------------
-    aiCamera* ConvertCamera(const Blender::Scene& in,
-        const Blender::Object* obj,
-        const Blender::Camera* mesh,
-        Blender::ConversionData& conv_data
-    );
+    aiCamera *ConvertCamera(const Blender::Scene &in,
+            const Blender::Object *obj,
+            const Blender::Camera *mesh,
+            Blender::ConversionData &conv_data);
 
     // --------------------
     void BuildDefaultMaterial(
-        Blender::ConversionData& conv_data
-    );
+            Blender::ConversionData &conv_data);
 
+    // --------------------
     void AddBlendParams(
-        aiMaterial* result,
-        const Blender::Material* source
-    );
+            aiMaterial *result,
+            const Blender::Material *source);
 
+    // --------------------
     void BuildMaterials(
-        Blender::ConversionData& conv_data
-    );
+            Blender::ConversionData &conv_data);
 
     // --------------------
     void ResolveTexture(
-        aiMaterial* out,
-        const Blender::Material* mat,
-        const Blender::MTex* tex,
-        Blender::ConversionData& conv_data
-    );
+            aiMaterial *out,
+            const Blender::Material *mat,
+            const Blender::MTex *tex,
+            Blender::ConversionData &conv_data);
 
     // --------------------
     void ResolveImage(
-        aiMaterial* out,
-        const Blender::Material* mat,
-        const Blender::MTex* tex,
-        const Blender::Image* img,
-        Blender::ConversionData& conv_data
-    );
+            aiMaterial *out,
+            const Blender::Material *mat,
+            const Blender::MTex *tex,
+            const Blender::Image *img,
+            Blender::ConversionData &conv_data);
 
+    // --------------------
     void AddSentinelTexture(
-        aiMaterial* out,
-        const Blender::Material* mat,
-        const Blender::MTex* tex,
-        Blender::ConversionData& conv_data
-    );
+            aiMaterial *out,
+            const Blender::Material *mat,
+            const Blender::MTex *tex,
+            Blender::ConversionData &conv_data);
 
 private: // static stuff, mostly logging and error reporting.
+    // --------------------
+    static void CheckActualType(const Blender::ElemBase *dt,
+            const char *check);
 
     // --------------------
-    static void CheckActualType(const Blender::ElemBase* dt,
-        const char* check
-    );
-
-    // --------------------
-    static void NotSupportedObjectType(const Blender::Object* obj,
-        const char* type
-    );
-
+    static void NotSupportedObjectType(const Blender::Object *obj,
+            const char *type);
 
 private:
-
-    Blender::BlenderModifierShowcase* modifier_cache;
+    Blender::BlenderModifierShowcase *modifier_cache;
 
 }; // !class BlenderImporter
 
diff --git a/code/AssetLib/COB/COBLoader.h b/code/AssetLib/COB/COBLoader.h
index e4d41e500..3b6f67070 100644
--- a/code/AssetLib/COB/COBLoader.h
+++ b/code/AssetLib/COB/COBLoader.h
@@ -51,104 +51,100 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 struct aiNode;
 
-namespace Assimp    {
-    class LineSplitter;
+namespace Assimp {
+class LineSplitter;
 
-    // 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;
-    }
+// 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;
+} // namespace Formatter
 
-    // COBScene.h
-    namespace COB {
-        struct ChunkInfo;
-        struct Node;
-        struct Scene;
-    }
+// COBScene.h
+namespace COB {
+struct ChunkInfo;
+struct Node;
+struct Scene;
+} // namespace COB
 
 // -------------------------------------------------------------------------------------------
 /** Importer class to load TrueSpace files (cob,scn) up to v6.
  *
  *  Currently relatively limited, loads only ASCII files and needs more test coverage. */
 // -------------------------------------------------------------------------------------------
-class COBImporter : public BaseImporter
-{
+class COBImporter : public BaseImporter {
 public:
     COBImporter();
-    ~COBImporter();
+    ~COBImporter() override;
 
     // --------------------
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
+    // --------------------
+    const aiImporterDesc *GetInfo() const override;
 
     // --------------------
-    const aiImporterDesc* GetInfo () const;
+    void SetupProperties(const Importer *pImp) override;
 
     // --------------------
-    void SetupProperties(const Importer* pImp);
-
-    // --------------------
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
     // -------------------------------------------------------------------
     /** Prepend 'COB: ' and throw msg.*/
-    AI_WONT_RETURN static void ThrowException(const std::string& msg) AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN static void ThrowException(const std::string &msg) AI_WONT_RETURN_SUFFIX;
 
     // -------------------------------------------------------------------
     /** @brief Read from an ascii scene/object file
      *  @param out Receives output data.
      *  @param stream Stream to read from. */
-    void ReadAsciiFile(COB::Scene& out, StreamReaderLE* stream);
+    void ReadAsciiFile(COB::Scene &out, StreamReaderLE *stream);
 
     // -------------------------------------------------------------------
     /** @brief Read from a binary scene/object file
      *  @param out Receives output data.
      *  @param stream Stream to read from.  */
-    void ReadBinaryFile(COB::Scene& out, StreamReaderLE* stream);
+    void ReadBinaryFile(COB::Scene &out, StreamReaderLE *stream);
 
     // Conversion to Assimp output format
-
-    aiNode* BuildNodes(const COB::Node& root,const COB::Scene& scin,aiScene* fill);
+    aiNode *BuildNodes(const COB::Node &root, const COB::Scene &scin, aiScene *fill);
 
 private:
     // ASCII file support
 
-    void UnsupportedChunk_Ascii(LineSplitter& splitter, const COB::ChunkInfo& nfo, const char* name);
-    void ReadChunkInfo_Ascii(COB::ChunkInfo& out, const LineSplitter& splitter);
-    void ReadBasicNodeInfo_Ascii(COB::Node& msh, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    template <typename T> void ReadFloat3Tuple_Ascii(T& fill, const char** in);
-
-    void ReadPolH_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadBitM_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadMat1_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadGrou_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadBone_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadCame_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadLght_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadUnit_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
-    void ReadChan_Ascii(COB::Scene& out, LineSplitter& splitter, const COB::ChunkInfo& nfo);
+    void UnsupportedChunk_Ascii(LineSplitter &splitter, const COB::ChunkInfo &nfo, const char *name);
+    void ReadChunkInfo_Ascii(COB::ChunkInfo &out, const LineSplitter &splitter);
+    void ReadBasicNodeInfo_Ascii(COB::Node &msh, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    template <typename T>
+    void ReadFloat3Tuple_Ascii(T &fill, const char **in);
 
+    void ReadPolH_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadBitM_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadMat1_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadGrou_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadBone_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadCame_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadLght_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadUnit_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
+    void ReadChan_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
 
     // Binary file support
 
-    void UnsupportedChunk_Binary(StreamReaderLE& reader, const COB::ChunkInfo& nfo, const char* name);
-    void ReadString_Binary(std::string& out, StreamReaderLE& reader);
-    void ReadBasicNodeInfo_Binary(COB::Node& msh, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-
-    void ReadPolH_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadBitM_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadMat1_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadCame_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadLght_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadGrou_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
-    void ReadUnit_Binary(COB::Scene& out, StreamReaderLE& reader, const COB::ChunkInfo& nfo);
+    void UnsupportedChunk_Binary(StreamReaderLE &reader, const COB::ChunkInfo &nfo, const char *name);
+    void ReadString_Binary(std::string &out, StreamReaderLE &reader);
+    void ReadBasicNodeInfo_Binary(COB::Node &msh, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
 
+    void ReadPolH_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadBitM_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadMat1_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadCame_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadLght_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadGrou_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
+    void ReadUnit_Binary(COB::Scene &out, StreamReaderLE &reader, const COB::ChunkInfo &nfo);
 
 }; // !class COBImporter
 
diff --git a/code/AssetLib/COB/COBScene.h b/code/AssetLib/COB/COBScene.h
index c1308a9ea..d2ce11dd5 100644
--- a/code/AssetLib/COB/COBScene.h
+++ b/code/AssetLib/COB/COBScene.h
@@ -4,7 +4,6 @@ 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,
@@ -43,16 +42,16 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  COBScene.h
 *  @brief Utilities for the COB importer.
 */
+#pragma once
 #ifndef INCLUDED_AI_COB_SCENE_H
 #define INCLUDED_AI_COB_SCENE_H
 
-#include <memory>
-#include <deque>
-#include <map>
-
 #include <assimp/BaseImporter.h>
 #include <assimp/material.h>
 
+#include <deque>
+#include <map>
+
 namespace Assimp {
 namespace COB {
 
diff --git a/code/AssetLib/CSM/CSMLoader.h b/code/AssetLib/CSM/CSMLoader.h
index 68783150d..e30d8fc5b 100644
--- a/code/AssetLib/CSM/CSMLoader.h
+++ b/code/AssetLib/CSM/CSMLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -48,7 +47,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/BaseImporter.h>
 
-namespace Assimp    {
+namespace Assimp {
 
 // ---------------------------------------------------------------------------
 /** Importer class to load MOCAPs in CharacterStudio Motion format.
@@ -59,35 +58,32 @@ namespace Assimp    {
  *  Link to file format specification:
  *  <max_8_dvd>\samples\Motion\Docs\CSM.rtf
 */
-class CSMImporter : public BaseImporter
-{
+class CSMImporter : public BaseImporter {
 public:
     CSMImporter();
-    ~CSMImporter();
+    ~CSMImporter() override;
 
-
-public:
     // -------------------------------------------------------------------
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
+    // -------------------------------------------------------------------
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
-    const aiImporterDesc* GetInfo () const;
+    void SetupProperties(const Importer *pImp) override;
 
     // -------------------------------------------------------------------
-    void SetupProperties(const Importer* pImp);
-
-    // -------------------------------------------------------------------
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
     bool noSkeletonMesh;
 
 }; // end of class CSMImporter
+
 } // end of namespace Assimp
+
 #endif // AI_AC3DIMPORTER_H_INC
 
diff --git a/code/AssetLib/Collada/ColladaLoader.cpp b/code/AssetLib/Collada/ColladaLoader.cpp
index 8b22b7c71..6f40c1a78 100644
--- a/code/AssetLib/Collada/ColladaLoader.cpp
+++ b/code/AssetLib/Collada/ColladaLoader.cpp
@@ -47,7 +47,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "ColladaParser.h"
 #include <assimp/ColladaMetaData.h>
 #include <assimp/CreateAnimMesh.h>
-#include <assimp/Defines.h>
 #include <assimp/ParsingUtils.h>
 #include <assimp/SkeletonMeshBuilder.h>
 #include <assimp/ZipArchiveIOSystem.h>
diff --git a/code/AssetLib/Collada/ColladaParser.h b/code/AssetLib/Collada/ColladaParser.h
index 37ee0ec68..73e836b32 100644
--- a/code/AssetLib/Collada/ColladaParser.h
+++ b/code/AssetLib/Collada/ColladaParser.h
@@ -43,6 +43,7 @@
  *  @brief Defines the parser helper class for the collada loader
  */
 
+#pragma once
 #ifndef AI_COLLADAPARSER_H_INC
 #define AI_COLLADAPARSER_H_INC
 
diff --git a/code/AssetLib/DXF/DXFLoader.h b/code/AssetLib/DXF/DXFLoader.h
index 6649deb34..2aace91b2 100644
--- a/code/AssetLib/DXF/DXFLoader.h
+++ b/code/AssetLib/DXF/DXFLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  DXFLoader.h
  *  @brief Declaration of the .dxf importer class.
  */
+#pragma once
 #ifndef AI_DXFLOADER_H_INCLUDED
 #define AI_DXFLOADER_H_INCLUDED
 
@@ -59,7 +59,7 @@ namespace DXF {
     struct Block;
     struct InsertBlock;
 
-    typedef std::map<std::string, const DXF::Block*> BlockMap;
+    using BlockMap = std::map<std::string, const DXF::Block*>;
 }
 
 // ---------------------------------------------------------------------------
@@ -69,29 +69,26 @@ namespace DXF {
 class DXFImporter : public BaseImporter {
 public:
     DXFImporter();
-    ~DXFImporter();
+    ~DXFImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details*/
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details */
-    void InternReadFile( const std::string& pFile,
-        aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
 
 private:
-
     // -----------------------------------------------------
     void SkipSection(DXF::LineReader& reader);
 
diff --git a/code/AssetLib/FBX/FBXImporter.h b/code/AssetLib/FBX/FBXImporter.h
index 156a68a91..2d01f5434 100644
--- a/code/AssetLib/FBX/FBXImporter.h
+++ b/code/AssetLib/FBX/FBXImporter.h
@@ -70,28 +70,29 @@ typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>
 class FBXImporter : public BaseImporter, public LogFunctions<FBXImporter> {
 public:
     FBXImporter();
-    virtual ~FBXImporter();
+    ~FBXImporter() override;
 
     // --------------------
     bool CanRead(const std::string &pFile,
             IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // --------------------
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // --------------------
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
     // --------------------
     void InternReadFile(const std::string &pFile,
             aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
 private:
     FBX::ImportSettings settings;
 }; // !class FBXImporter
 
 } // end of namespace Assimp
+
 #endif // !INCLUDED_AI_FBX_IMPORTER_H
diff --git a/code/AssetLib/HMP/HMPLoader.h b/code/AssetLib/HMP/HMPLoader.h
index 880aeecc9..c78f7ea5a 100644
--- a/code/AssetLib/HMP/HMPLoader.h
+++ b/code/AssetLib/HMP/HMPLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -42,15 +41,15 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  HMPLoader.h
  *  @brief Declaration of the HMP importer class
  */
-
+#pragma once
 #ifndef AI_HMPLOADER_H_INCLUDED
 #define AI_HMPLOADER_H_INCLUDED
 
-// internal headers
 #include <assimp/BaseImporter.h>
 
-#include "AssetLib/MDL/MDLLoader.h"
+// internal headers
 #include "AssetLib/HMP/HMPFileData.h"
+#include "AssetLib/MDL/MDLLoader.h"
 
 namespace Assimp {
 using namespace HMP;
@@ -58,66 +57,58 @@ using namespace HMP;
 // ---------------------------------------------------------------------------
 /** Used to load 3D GameStudio HMP files (terrains)
 */
-class HMPImporter : public MDLImporter
-{
+class HMPImporter : public MDLImporter {
 public:
     HMPImporter();
-    ~HMPImporter();
-
-
-public:
+    ~HMPImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
-
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
-protected:
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Import a HMP4 file
     */
-    void InternReadFile_HMP4( );
+    void InternReadFile_HMP4();
 
     // -------------------------------------------------------------------
     /** Import a HMP5 file
     */
-    void InternReadFile_HMP5( );
+    void InternReadFile_HMP5();
 
     // -------------------------------------------------------------------
     /** Import a HMP7 file
     */
-    void InternReadFile_HMP7( );
+    void InternReadFile_HMP7();
 
     // -------------------------------------------------------------------
     /** Validate a HMP 5,4,7 file header
     */
-    void ValidateHeader_HMP457( );
+    void ValidateHeader_HMP457();
 
     // -------------------------------------------------------------------
     /** Try to load one material from the file, if this fails create
      * a default material
     */
-    void CreateMaterial(const unsigned char* szCurrent,
-        const unsigned char** szCurrentOut);
+    void CreateMaterial(const unsigned char *szCurrent,
+            const unsigned char **szCurrentOut);
 
     // -------------------------------------------------------------------
     /** Build a list of output faces and vertices. The function
@@ -125,7 +116,7 @@ protected:
      * \param width Width of the height field
      * \param width Height of the height field
     */
-    void CreateOutputFaceList(unsigned int width,unsigned int height);
+    void CreateOutputFaceList(unsigned int width, unsigned int height);
 
     // -------------------------------------------------------------------
     /** Generate planar texture coordinates for a terrain
@@ -133,21 +124,17 @@ protected:
      * \param height Height of the terrain, in vertices
     */
     void GenerateTextureCoords(const unsigned int width,
-        const unsigned int height);
+            const unsigned int height);
 
     // -------------------------------------------------------------------
     /** Read the first skin from the file and skip all others ...
      *  \param iNumSkins Number of skins in the file
      *  \param szCursor Position of the first skin (offset 84)
     */
-    void ReadFirstSkin(unsigned int iNumSkins, const unsigned char* szCursor,
-        const unsigned char** szCursorOut);
-
-private:
-
+    void ReadFirstSkin(unsigned int iNumSkins, const unsigned char *szCursor,
+            const unsigned char **szCursorOut);
 };
 
 } // end of namespace Assimp
 
 #endif // AI_HMPIMPORTER_H_INC
-
diff --git a/code/AssetLib/IFC/IFCBoolean.cpp b/code/AssetLib/IFC/IFCBoolean.cpp
index afd0ad6eb..08173472d 100644
--- a/code/AssetLib/IFC/IFCBoolean.cpp
+++ b/code/AssetLib/IFC/IFCBoolean.cpp
@@ -48,7 +48,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "Common/PolyTools.h"
 #include "PostProcessing/ProcessHelper.h"
 
-#include <assimp/Defines.h>
 
 #include <iterator>
 #include <tuple>
diff --git a/code/AssetLib/IFC/IFCLoader.h b/code/AssetLib/IFC/IFCLoader.h
index 96374bfce..a5c22387e 100644
--- a/code/AssetLib/IFC/IFCLoader.h
+++ b/code/AssetLib/IFC/IFCLoader.h
@@ -49,18 +49,22 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/BaseImporter.h>
 #include <assimp/LogAux.h>
 
-namespace Assimp    {
+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;
-    }
+// TinyFormatter.h
+namespace Formatter {
 
-    namespace STEP {
-        class DB;
-    }
+template <typename T, typename TR, typename A>
+class basic_formatter;
+typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>> format;
 
+} // namespace Formatter
+
+namespace STEP {
+
+class DB;
+
+}
 
 // -------------------------------------------------------------------------------------------
 /** Load the IFC format, which is an open specification to describe building and construction
@@ -69,63 +73,41 @@ namespace Assimp    {
  See http://en.wikipedia.org/wiki/Industry_Foundation_Classes
 */
 // -------------------------------------------------------------------------------------------
-class IFCImporter : public BaseImporter, public LogFunctions<IFCImporter>
-{
+class IFCImporter : public BaseImporter, public LogFunctions<IFCImporter> {
 public:
-    IFCImporter();
-    ~IFCImporter();
-
-
-public:
-
-    // --------------------
-    bool CanRead( const std::string& pFile,
-        IOSystem* pIOHandler,
-        bool checkSig
-    ) const;
-
-protected:
-
-    // --------------------
-    const aiImporterDesc* GetInfo () const;
-
-    // --------------------
-    void SetupProperties(const Importer* pImp);
-
-    // --------------------
-    void InternReadFile( const std::string& pFile,
-        aiScene* pScene,
-        IOSystem* pIOHandler
-    );
-
-private:
-
-
-public:
-
-
     // loader settings, publicly accessible via their corresponding AI_CONFIG constants
-    struct Settings
-    {
-        Settings()
-            : skipSpaceRepresentations()
-            , useCustomTriangulation()
-            , skipAnnotations()
-            , conicSamplingAngle(10.f)
-			, cylindricalTessellation(32)
-        {}
-
+    struct Settings {
+        Settings() :
+                skipSpaceRepresentations(), useCustomTriangulation(), skipAnnotations(), conicSamplingAngle(10.f), cylindricalTessellation(32) {}
 
         bool skipSpaceRepresentations;
         bool useCustomTriangulation;
         bool skipAnnotations;
         float conicSamplingAngle;
-		int cylindricalTessellation;
+        int cylindricalTessellation;
     };
 
+    IFCImporter();
+    ~IFCImporter() override;
+
+    // --------------------
+    bool CanRead(const std::string &pFile,
+            IOSystem *pIOHandler,
+            bool checkSig) const override;
+
+protected:
+    // --------------------
+    const aiImporterDesc *GetInfo() const override;
+
+    // --------------------
+    void SetupProperties(const Importer *pImp) override;
+
+    // --------------------
+    void InternReadFile(const std::string &pFile,
+            aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
     Settings settings;
 
 }; // !class IFCImporter
diff --git a/code/AssetLib/IFC/IFCUtil.cpp b/code/AssetLib/IFC/IFCUtil.cpp
index 8c37cebed..b3b7b0382 100644
--- a/code/AssetLib/IFC/IFCUtil.cpp
+++ b/code/AssetLib/IFC/IFCUtil.cpp
@@ -49,7 +49,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AssetLib/IFC/IFCUtil.h"
 #include "Common/PolyTools.h"
 #include "PostProcessing/ProcessHelper.h"
-#include <assimp/Defines.h>
 
 namespace Assimp {
 namespace IFC {
diff --git a/code/AssetLib/Irr/IRRLoader.h b/code/AssetLib/Irr/IRRLoader.h
index da90902ed..147b94414 100644
--- a/code/AssetLib/Irr/IRRLoader.h
+++ b/code/AssetLib/Irr/IRRLoader.h
@@ -65,22 +65,21 @@ namespace Assimp    {
 class IRRImporter : public BaseImporter, public IrrlichtBase {
 public:
     IRRImporter();
-    ~IRRImporter();
+    ~IRRImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      *  See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
-    const aiImporterDesc* GetInfo () const;
-    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler);
-    void SetupProperties(const Importer* pImp);
+    const aiImporterDesc* GetInfo () const override;
+    void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
+    void SetupProperties(const Importer* pImp) override;
 
 private:
-
     /** Data structure for a scene-graph node animator
      */
     struct Animator {
diff --git a/code/AssetLib/Irr/IRRMeshLoader.h b/code/AssetLib/Irr/IRRMeshLoader.h
index 948a6ba3d..2a253bf20 100644
--- a/code/AssetLib/Irr/IRRMeshLoader.h
+++ b/code/AssetLib/Irr/IRRMeshLoader.h
@@ -63,28 +63,28 @@ namespace Assimp {
 class IRRMeshImporter : public BaseImporter, public IrrlichtBase {
 public:
     IRRMeshImporter();
-    ~IRRMeshImporter();
+    ~IRRMeshImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      *  See BaseImporter::CanRead() for details.
      */
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details
      */
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 };
 
 } // end of namespace Assimp
diff --git a/code/AssetLib/Irr/IRRShared.h b/code/AssetLib/Irr/IRRShared.h
index ce8851ebc..90e212d65 100644
--- a/code/AssetLib/Irr/IRRShared.h
+++ b/code/AssetLib/Irr/IRRShared.h
@@ -9,7 +9,7 @@
 
 #include <assimp/BaseImporter.h>
 #include <assimp/XmlParser.h>
-#include <stdint.h>
+#include <cstdint>
 
 struct aiMaterial;
 
diff --git a/code/AssetLib/LWO/LWOLoader.h b/code/AssetLib/LWO/LWOLoader.h
index 31911945f..0999071d6 100644
--- a/code/AssetLib/LWO/LWOLoader.h
+++ b/code/AssetLib/LWO/LWOLoader.h
@@ -41,15 +41,14 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 /** @file Declaration of the LWO importer class. */
+#pragma once
 #ifndef AI_LWOLOADER_H_INCLUDED
 #define AI_LWOLOADER_H_INCLUDED
 
-#include <assimp/types.h>
-#include <assimp/material.h>
-#include <assimp/DefaultLogger.hpp>
-
 #include "LWOFileData.h"
 #include <assimp/BaseImporter.h>
+#include <assimp/material.h>
+#include <assimp/DefaultLogger.hpp>
 
 #include <map>
 
@@ -57,7 +56,7 @@ struct aiTexture;
 struct aiNode;
 struct aiMaterial;
 
-namespace Assimp    {
+namespace Assimp {
 using namespace LWO;
 
 // ---------------------------------------------------------------------------
@@ -70,41 +69,38 @@ using namespace LWO;
  *         they aren't specific to one format version
 */
 // ---------------------------------------------------------------------------
-class LWOImporter : public BaseImporter
-{
+class LWOImporter : public BaseImporter {
 public:
     LWOImporter();
-    ~LWOImporter();
+    ~LWOImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 protected:
-
     // -------------------------------------------------------------------
     // Get list of supported extensions
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
     // -------------------------------------------------------------------
     /** Loads a LWO file in the older LWOB format (LW < 6)
      */
@@ -115,16 +111,14 @@ private:
      */
     void LoadLWO2File();
 
-
     // -------------------------------------------------------------------
     /** Parsing functions used for all file format versions
     */
-    inline void GetS0(std::string& out,unsigned int max);
+    inline void GetS0(std::string &out, unsigned int max);
     inline float GetF4();
     inline uint32_t GetU4();
     inline uint16_t GetU2();
-    inline uint8_t  GetU1();
-
+    inline uint8_t GetU1();
 
     // -------------------------------------------------------------------
     /** Loads a surface chunk from an LWOB file
@@ -143,28 +137,28 @@ private:
      *  @param size Maximum size to be read, in bytes.
      *  @param head Header of the SUF.BLOK header
      */
-    void LoadLWO2TextureBlock(LE_NCONST IFF::SubChunkHeader* head,
-        unsigned int size );
+    void LoadLWO2TextureBlock(LE_NCONST IFF::SubChunkHeader *head,
+            unsigned int size);
 
     // -------------------------------------------------------------------
     /** Loads a shader block from a LWO2 file.
      *  @param size Maximum size to be read, in bytes.
      *  @param head Header of the SUF.BLOK header
      */
-    void LoadLWO2ShaderBlock(LE_NCONST IFF::SubChunkHeader* head,
-        unsigned int size );
+    void LoadLWO2ShaderBlock(LE_NCONST IFF::SubChunkHeader *head,
+            unsigned int size);
 
     // -------------------------------------------------------------------
     /** Loads an image map from a LWO2 file
      *  @param size Maximum size to be read, in bytes.
      *  @param tex Texture object to be filled
      */
-    void LoadLWO2ImageMap(unsigned int size, LWO::Texture& tex );
-    void LoadLWO2Gradient(unsigned int size, LWO::Texture& tex );
-    void LoadLWO2Procedural(unsigned int size, LWO::Texture& tex );
+    void LoadLWO2ImageMap(unsigned int size, LWO::Texture &tex);
+    void LoadLWO2Gradient(unsigned int size, LWO::Texture &tex);
+    void LoadLWO2Procedural(unsigned int size, LWO::Texture &tex);
 
     // loads the header - used by thethree functions above
-    void LoadLWO2TextureHeader(unsigned int size, LWO::Texture& tex );
+    void LoadLWO2TextureHeader(unsigned int size, LWO::Texture &tex);
 
     // -------------------------------------------------------------------
     /** Loads the LWO tag list from the file
@@ -213,30 +207,30 @@ private:
     // -------------------------------------------------------------------
     /** Count vertices and faces in a LWOB/LWO2 file
     */
-    void CountVertsAndFacesLWO2(unsigned int& verts,
-        unsigned int& faces,
-        uint16_t*& cursor,
-        const uint16_t* const end,
-        unsigned int max = UINT_MAX);
+    void CountVertsAndFacesLWO2(unsigned int &verts,
+            unsigned int &faces,
+            uint16_t *&cursor,
+            const uint16_t *const end,
+            unsigned int max = UINT_MAX);
 
-    void CountVertsAndFacesLWOB(unsigned int& verts,
-        unsigned int& faces,
-        LE_NCONST uint16_t*& cursor,
-        const uint16_t* const end,
-        unsigned int max = UINT_MAX);
+    void CountVertsAndFacesLWOB(unsigned int &verts,
+            unsigned int &faces,
+            LE_NCONST uint16_t *&cursor,
+            const uint16_t *const end,
+            unsigned int max = UINT_MAX);
 
     // -------------------------------------------------------------------
     /** Read vertices and faces in a LWOB/LWO2 file
     */
-    void CopyFaceIndicesLWO2(LWO::FaceList::iterator& it,
-        uint16_t*& cursor,
-        const uint16_t* const end);
+    void CopyFaceIndicesLWO2(LWO::FaceList::iterator &it,
+            uint16_t *&cursor,
+            const uint16_t *const end);
 
     // -------------------------------------------------------------------
-    void CopyFaceIndicesLWOB(LWO::FaceList::iterator& it,
-        LE_NCONST uint16_t*& cursor,
-        const uint16_t* const end,
-        unsigned int max = UINT_MAX);
+    void CopyFaceIndicesLWOB(LWO::FaceList::iterator &it,
+            LE_NCONST uint16_t *&cursor,
+            const uint16_t *const end,
+            unsigned int max = UINT_MAX);
 
     // -------------------------------------------------------------------
     /** Resolve the tag and surface lists that have been loaded.
@@ -257,19 +251,18 @@ private:
      *  @param in Input texture list
      *  @param type Type identifier of the texture list
     */
-    bool HandleTextures(aiMaterial* pcMat, const TextureList& in,
-        aiTextureType type);
+    bool HandleTextures(aiMaterial *pcMat, const TextureList &in,
+            aiTextureType type);
 
     // -------------------------------------------------------------------
     /** Adjust a texture path
     */
-    void AdjustTexturePath(std::string& out);
+    void AdjustTexturePath(std::string &out);
 
     // -------------------------------------------------------------------
     /** Convert a LWO surface description to an ASSIMP material
     */
-    void ConvertMaterial(const LWO::Surface& surf,aiMaterial* pcMat);
-
+    void ConvertMaterial(const LWO::Surface &surf, aiMaterial *pcMat);
 
     // -------------------------------------------------------------------
     /** Get a list of all UV/VC channels required by a specific surface.
@@ -279,27 +272,27 @@ private:
      *  @param out Output list. The members are indices into the
      *    UV/VC channel lists of the layer
     */
-    void FindUVChannels(/*const*/ LWO::Surface& surf,
-        LWO::SortedRep& sorted,
-        /*const*/ LWO::Layer& layer,
-        unsigned int out[AI_MAX_NUMBER_OF_TEXTURECOORDS]);
+    void FindUVChannels(/*const*/ LWO::Surface &surf,
+            LWO::SortedRep &sorted,
+            /*const*/ LWO::Layer &layer,
+            unsigned int out[AI_MAX_NUMBER_OF_TEXTURECOORDS]);
 
     // -------------------------------------------------------------------
-    char FindUVChannels(LWO::TextureList& list,
-        LWO::Layer& layer,LWO::UVChannel& uv, unsigned int next);
+    char FindUVChannels(LWO::TextureList &list,
+            LWO::Layer &layer, LWO::UVChannel &uv, unsigned int next);
 
     // -------------------------------------------------------------------
-    void FindVCChannels(const LWO::Surface& surf,
-        LWO::SortedRep& sorted,
-        const LWO::Layer& layer,
-        unsigned int out[AI_MAX_NUMBER_OF_COLOR_SETS]);
+    void FindVCChannels(const LWO::Surface &surf,
+            LWO::SortedRep &sorted,
+            const LWO::Layer &layer,
+            unsigned int out[AI_MAX_NUMBER_OF_COLOR_SETS]);
 
     // -------------------------------------------------------------------
     /** Generate the final node graph
      *  Unused nodes are deleted.
      *  @param apcNodes Flat list of nodes
     */
-    void GenerateNodeGraph(std::map<uint16_t,aiNode*>& apcNodes);
+    void GenerateNodeGraph(std::map<uint16_t, aiNode *> &apcNodes);
 
     // -------------------------------------------------------------------
     /** Add children to a node
@@ -307,14 +300,14 @@ private:
      *  @param parent Index of the node
      *  @param apcNodes Flat list of nodes - used nodes are set to nullptr.
     */
-    void AddChildren(aiNode* node, uint16_t parent,
-        std::vector<aiNode*>& apcNodes);
+    void AddChildren(aiNode *node, uint16_t parent,
+            std::vector<aiNode *> &apcNodes);
 
     // -------------------------------------------------------------------
     /** Read a variable sized integer
      *  @param inout Input and output buffer
     */
-    int ReadVSizedIntLWO2(uint8_t*& inout);
+    int ReadVSizedIntLWO2(uint8_t *&inout);
 
     // -------------------------------------------------------------------
     /** Assign a value from a VMAP to a vertex and all vertices
@@ -325,8 +318,8 @@ private:
      *  @param data Value of the VMAP to be assigned - read numRead
      *    floats from this array.
     */
-    void DoRecursiveVMAPAssignment(VMapEntry* base, unsigned int numRead,
-        unsigned int idx, float* data);
+    void DoRecursiveVMAPAssignment(VMapEntry *base, unsigned int numRead,
+            unsigned int idx, float *data);
 
     // -------------------------------------------------------------------
     /** Compute normal vectors for a mesh
@@ -334,9 +327,8 @@ private:
      *  @param smoothingGroups Smoothing-groups-per-face array
      *  @param surface Surface for the mesh
     */
-    void ComputeNormals(aiMesh* mesh, const std::vector<unsigned int>& smoothingGroups,
-        const LWO::Surface& surface);
-
+    void ComputeNormals(aiMesh *mesh, const std::vector<unsigned int> &smoothingGroups,
+            const LWO::Surface &surface);
 
     // -------------------------------------------------------------------
     /** Setup a new texture after the corresponding chunk was
@@ -345,11 +337,10 @@ private:
      *  @param size Maximum number of bytes to be read
      *  @return Pointer to new texture
     */
-    LWO::Texture* SetupNewTextureLWOB(LWO::TextureList& list,
-        unsigned int size);
+    LWO::Texture *SetupNewTextureLWOB(LWO::TextureList &list,
+            unsigned int size);
 
 protected:
-
     /** true if the file is a LWO2 file*/
     bool mIsLWO2;
 
@@ -357,20 +348,20 @@ protected:
     bool mIsLXOB;
 
     /** Temporary list of layers from the file */
-    LayerList* mLayers;
+    LayerList *mLayers;
 
     /** Pointer to the current layer */
-    LWO::Layer* mCurLayer;
+    LWO::Layer *mCurLayer;
 
     /** Temporary tag list from the file */
-    TagList* mTags;
+    TagList *mTags;
 
     /** Mapping table to convert from tag to surface indices.
         UINT_MAX indicates that a no corresponding surface is available */
-    TagMappingTable* mMapping;
+    TagMappingTable *mMapping;
 
     /** Temporary surface list from the file */
-    SurfaceList* mSurfaces;
+    SurfaceList *mSurfaces;
 
     /** Temporary clip list from the file */
     ClipList mClips;
@@ -379,13 +370,13 @@ protected:
     EnvelopeList mEnvelopes;
 
     /** file buffer */
-    uint8_t* mFileBuffer;
+    uint8_t *mFileBuffer;
 
     /** Size of the file, in bytes */
     unsigned int fileSize;
 
     /** Output scene */
-    aiScene* mScene;
+    aiScene *mScene;
 
     /** Configuration option: speed flag set? */
     bool configSpeedFlag;
@@ -394,16 +385,14 @@ protected:
     unsigned int configLayerIndex;
 
     /** Configuration option: name of layer to be loaded */
-    std::string  configLayerName;
+    std::string configLayerName;
 
     /** True if we have a named layer */
     bool hasNamedLayer;
 };
 
-
 // ------------------------------------------------------------------------------------------------
-inline
-float LWOImporter::GetF4() {
+inline float LWOImporter::GetF4() {
     float f;
     ::memcpy(&f, mFileBuffer, 4);
     mFileBuffer += 4;
@@ -412,8 +401,7 @@ float LWOImporter::GetF4() {
 }
 
 // ------------------------------------------------------------------------------------------------
-inline uint32_t LWOImporter::GetU4()
-{
+inline uint32_t LWOImporter::GetU4() {
     uint32_t f;
     ::memcpy(&f, mFileBuffer, 4);
     mFileBuffer += 4;
@@ -422,8 +410,7 @@ inline uint32_t LWOImporter::GetU4()
 }
 
 // ------------------------------------------------------------------------------------------------
-inline uint16_t LWOImporter::GetU2()
-{
+inline uint16_t LWOImporter::GetU2() {
     uint16_t f;
     ::memcpy(&f, mFileBuffer, 2);
     mFileBuffer += 2;
@@ -432,55 +419,50 @@ inline uint16_t LWOImporter::GetU2()
 }
 
 // ------------------------------------------------------------------------------------------------
-inline uint8_t LWOImporter::GetU1()
-{
+inline uint8_t LWOImporter::GetU1() {
     return *mFileBuffer++;
 }
 
 // ------------------------------------------------------------------------------------------------
-inline int LWOImporter::ReadVSizedIntLWO2(uint8_t*& inout)
-{
+inline int LWOImporter::ReadVSizedIntLWO2(uint8_t *&inout) {
     int i;
-    int c = *inout;inout++;
-    if(c != 0xFF)
-    {
+    int c = *inout;
+    inout++;
+    if (c != 0xFF) {
         i = c << 8;
-        c = *inout;inout++;
+        c = *inout;
+        inout++;
         i |= c;
-    }
-    else
-    {
-        c = *inout;inout++;
+    } else {
+        c = *inout;
+        inout++;
         i = c << 16;
-        c = *inout;inout++;
+        c = *inout;
+        inout++;
         i |= c << 8;
-        c = *inout;inout++;
+        c = *inout;
+        inout++;
         i |= c;
     }
     return i;
 }
 
 // ------------------------------------------------------------------------------------------------
-inline void LWOImporter::GetS0(std::string& out,unsigned int max)
-{
+inline void LWOImporter::GetS0(std::string &out, unsigned int max) {
     unsigned int iCursor = 0;
-    const char*sz = (const char*)mFileBuffer;
-    while (*mFileBuffer)
-    {
-        if (++iCursor > max)
-        {
+    const char *sz = (const char *)mFileBuffer;
+    while (*mFileBuffer) {
+        if (++iCursor > max) {
             ASSIMP_LOG_WARN("LWO: Invalid file, string is is too long");
             break;
         }
         ++mFileBuffer;
     }
-    size_t len = (size_t) ((const char*)mFileBuffer-sz);
-    out = std::string(sz,len);
-    mFileBuffer += (len&0x1 ? 1 : 2);
+    size_t len = (size_t)((const char *)mFileBuffer - sz);
+    out = std::string(sz, len);
+    mFileBuffer += (len & 0x1 ? 1 : 2);
 }
 
-
-
 } // end of namespace Assimp
 
 #endif // AI_LWOIMPORTER_H_INCLUDED
diff --git a/code/AssetLib/LWS/LWSLoader.h b/code/AssetLib/LWS/LWSLoader.h
index cd7a0543e..820bc8156 100644
--- a/code/AssetLib/LWS/LWSLoader.h
+++ b/code/AssetLib/LWS/LWSLoader.h
@@ -42,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  LWSLoader.h
  *  @brief Declaration of the LightWave scene importer class.
  */
+#pragma once
 #ifndef AI_LWSLOADER_H_INCLUDED
 #define AI_LWSLOADER_H_INCLUDED
 
@@ -53,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 struct aiImporterDesc;
 
 namespace Assimp {
+
 class BatchLoader;
 class Importer;
 class IOSystem;
@@ -172,26 +174,26 @@ struct NodeDesc {
 class LWSImporter : public BaseImporter {
 public:
     LWSImporter();
-    ~LWSImporter();
+    ~LWSImporter() override;
 
     // -------------------------------------------------------------------
     // Check whether we can read a specific file
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     // Get list of supported extensions
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     // Import file into given scene data structure
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     // Setup import properties
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 private:
     // -------------------------------------------------------------------
@@ -226,9 +228,7 @@ private:
 private:
     bool configSpeedFlag;
     IOSystem *io;
-
     double first, last, fps;
-
     bool noSkeletonMesh;
 };
 
diff --git a/code/AssetLib/M3D/M3DImporter.h b/code/AssetLib/M3D/M3DImporter.h
index 05e8ced7b..34af117a3 100644
--- a/code/AssetLib/M3D/M3DImporter.h
+++ b/code/AssetLib/M3D/M3DImporter.h
@@ -65,21 +65,20 @@ class M3DImporter : public BaseImporter {
 public:
 	/// \brief  Default constructor
 	M3DImporter();
+    ~M3DImporter() override {}
 
-public:
 	/// \brief  Returns whether the class can handle the format of the given file.
 	/// \remark See BaseImporter::CanRead() for details.
-	bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const;
+	bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
+
+protected:
+    //! \brief  Appends the supported extension.
+    const aiImporterDesc *GetInfo() const override;
+
+    //! \brief  File import implementation.
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
 
 private:
-	aiScene *mScene = nullptr; // the scene to import to
-
-	//! \brief  Appends the supported extension.
-	const aiImporterDesc *GetInfo() const;
-
-	//! \brief  File import implementation.
-	void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler);
-
 	void importMaterials(const M3DWrapper &m3d);
 	void importTextures(const M3DWrapper &m3d);
 	void importMeshes(const M3DWrapper &m3d);
@@ -94,6 +93,9 @@ private:
 	void populateMesh(const M3DWrapper &m3d, aiMesh *pMesh, std::vector<aiFace> *faces, std::vector<aiVector3D> *verteces,
 			std::vector<aiVector3D> *normals, std::vector<aiVector3D> *texcoords, std::vector<aiColor4D> *colors,
 			std::vector<unsigned int> *vertexids);
+
+private:
+    aiScene *mScene = nullptr; // the scene to import to
 };
 
 } // Namespace Assimp
diff --git a/code/AssetLib/MD2/MD2Loader.h b/code/AssetLib/MD2/MD2Loader.h
index c8866b92b..c473fe35b 100644
--- a/code/AssetLib/MD2/MD2Loader.h
+++ b/code/AssetLib/MD2/MD2Loader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,61 +42,55 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  MD2Loader.h
  *  @brief Declaration of the .MD2 importer class.
  */
+#pragma once
 #ifndef AI_MD2LOADER_H_INCLUDED
 #define AI_MD2LOADER_H_INCLUDED
 
-#include <assimp/BaseImporter.h>
-#include <assimp/types.h>
-#include <assimp/ByteSwapper.h>
 #include "MD2FileData.h"
+#include <assimp/BaseImporter.h>
+#include <assimp/ByteSwapper.h>
+#include <assimp/types.h>
 
 struct aiNode;
 
-namespace Assimp  {
+namespace Assimp {
 
 using namespace MD2;
 
 // ---------------------------------------------------------------------------
 /** Importer class for MD2
 */
-class MD2Importer : public BaseImporter
-{
+class MD2Importer : public BaseImporter {
 public:
     MD2Importer();
-    ~MD2Importer();
-
-
-public:
+    ~MD2Importer() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
-
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Validate the header of the file
@@ -105,15 +98,14 @@ protected:
     void ValidateHeader();
 
 protected:
-
     /** Configuration option: frame to be loaded */
     unsigned int configFrameID;
 
     /** Header of the MD2 file */
-    BE_NCONST MD2::Header* m_pcHeader;
+    BE_NCONST MD2::Header *m_pcHeader;
 
     /** Buffer to hold the loaded file */
-    BE_NCONST uint8_t* mBuffer;
+    BE_NCONST uint8_t *mBuffer;
 
     /** Size of the file, in bytes */
     unsigned int fileSize;
diff --git a/code/AssetLib/MD3/MD3Loader.h b/code/AssetLib/MD3/MD3Loader.h
index 1a4e5982c..b334dac1e 100644
--- a/code/AssetLib/MD3/MD3Loader.h
+++ b/code/AssetLib/MD3/MD3Loader.h
@@ -4,7 +4,6 @@ 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,
@@ -46,9 +45,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_MD3LOADER_H_INCLUDED
 #define AI_MD3LOADER_H_INCLUDED
 
+#include "MD3FileData.h"
 #include <assimp/BaseImporter.h>
 #include <assimp/ByteSwapper.h>
-#include "MD3FileData.h"
 #include <assimp/StringComparison.h>
 #include <assimp/types.h>
 
@@ -56,8 +55,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 struct aiMaterial;
 
-namespace Assimp    {
-
+namespace Assimp {
 
 using namespace MD3;
 namespace Q3Shader {
@@ -65,16 +63,14 @@ namespace Q3Shader {
 // ---------------------------------------------------------------------------
 /** @brief Tiny utility data structure to hold the data of a .skin file
  */
-struct SkinData
-{
-    //! A single entryin texture list
-    struct TextureEntry : public std::pair<std::string,std::string>
-    {
+struct SkinData {
+    //! A single entry in texture list
+    struct TextureEntry : public std::pair<std::string, std::string> {
         // did we resolve this texture entry?
         bool resolved;
 
         // for std::find()
-        bool operator == (const std::string& f) const {
+        bool operator==(const std::string &f) const {
             return f == first;
         }
     };
@@ -88,8 +84,7 @@ struct SkinData
 // ---------------------------------------------------------------------------
 /** @brief Specifies cull modi for Quake shader files.
  */
-enum ShaderCullMode
-{
+enum ShaderCullMode {
     CULL_NONE,
     CULL_CW,
     CULL_CCW
@@ -98,8 +93,7 @@ enum ShaderCullMode
 // ---------------------------------------------------------------------------
 /** @brief Specifies alpha blend modi (src + dest) for Quake shader files
  */
-enum BlendFunc
-{
+enum BlendFunc {
     BLEND_NONE,
     BLEND_GL_ONE,
     BLEND_GL_ZERO,
@@ -112,8 +106,7 @@ enum BlendFunc
 // ---------------------------------------------------------------------------
 /** @brief Specifies alpha test modi for Quake texture maps
  */
-enum AlphaTestFunc
-{
+enum AlphaTestFunc {
     AT_NONE,
     AT_GT0,
     AT_LT128,
@@ -123,36 +116,31 @@ enum AlphaTestFunc
 // ---------------------------------------------------------------------------
 /** @brief Tiny utility data structure to hold a .shader map data block
  */
-struct ShaderMapBlock
-{
+struct ShaderMapBlock {
     ShaderMapBlock() AI_NO_EXCEPT
-         :  blend_src   (BLEND_NONE)
-         ,  blend_dest  (BLEND_NONE)
-         ,  alpha_test  (AT_NONE)
-    {}
+            : blend_src(BLEND_NONE),
+              blend_dest(BLEND_NONE),
+              alpha_test(AT_NONE) {}
 
     //! Name of referenced map
     std::string name;
 
     //! Blend and alpha test settings for texture
-    BlendFunc blend_src,blend_dest;
+    BlendFunc blend_src, blend_dest;
     AlphaTestFunc alpha_test;
 
-
     //! For std::find()
-    bool operator== (const std::string& o) const {
-        return !ASSIMP_stricmp(o,name);
+    bool operator==(const std::string &o) const {
+        return !ASSIMP_stricmp(o, name);
     }
 };
 
 // ---------------------------------------------------------------------------
 /** @brief Tiny utility data structure to hold a .shader data block
  */
-struct ShaderDataBlock
-{
+struct ShaderDataBlock {
     ShaderDataBlock() AI_NO_EXCEPT
-        :   cull    (CULL_CW)
-    {}
+            : cull(CULL_CW) {}
 
     //! Name of referenced data element
     std::string name;
@@ -163,18 +151,16 @@ struct ShaderDataBlock
     //! Maps defined in the shader
     std::list<ShaderMapBlock> maps;
 
-
     //! For std::find()
-    bool operator== (const std::string& o) const {
-        return !ASSIMP_stricmp(o,name);
+    bool operator==(const std::string &o) const {
+        return !ASSIMP_stricmp(o, name);
     }
 };
 
 // ---------------------------------------------------------------------------
 /** @brief Tiny utility data structure to hold the data of a .shader file
  */
-struct ShaderData
-{
+struct ShaderData {
     //! Shader data blocks
     std::list<ShaderDataBlock> blocks;
 };
@@ -188,8 +174,7 @@ struct ShaderData
  *  @param io IOSystem to be used for reading
  *  @return false if file is not accessible
  */
-bool LoadShader(ShaderData& fill, const std::string& file,IOSystem* io);
-
+bool LoadShader(ShaderData &fill, const std::string &file, IOSystem *io);
 
 // ---------------------------------------------------------------------------
 /** @brief Convert a Q3Shader to an aiMaterial
@@ -197,7 +182,7 @@ bool LoadShader(ShaderData& fill, const std::string& file,IOSystem* io);
  *  @param[out] out Material structure to be filled.
  *  @param[in] shader Input shader
  */
-void ConvertShaderToMaterial(aiMaterial* out, const ShaderDataBlock& shader);
+void ConvertShaderToMaterial(aiMaterial *out, const ShaderDataBlock &shader);
 
 // ---------------------------------------------------------------------------
 /** @brief Load a skin file
@@ -208,56 +193,50 @@ void ConvertShaderToMaterial(aiMaterial* out, const ShaderDataBlock& shader);
  *  @param io IOSystem to be used for reading
  *  @return false if file is not accessible
  */
-bool LoadSkin(SkinData& fill, const std::string& file,IOSystem* io);
+bool LoadSkin(SkinData &fill, const std::string &file, IOSystem *io);
 
-} // ! namespace Q3SHader
+} // namespace Q3Shader
 
 // ---------------------------------------------------------------------------
 /** @brief Importer class to load MD3 files
 */
-class MD3Importer : public BaseImporter
-{
+class MD3Importer : public BaseImporter {
 public:
     MD3Importer();
-    ~MD3Importer();
-
-
-public:
+    ~MD3Importer() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
-
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details
      */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Validate offsets in the header
      */
     void ValidateHeaderOffsets();
-    void ValidateSurfaceHeaderOffsets(const MD3::Surface* pcSurfHeader);
+    void ValidateSurfaceHeaderOffsets(const MD3::Surface *pcSurfHeader);
 
     // -------------------------------------------------------------------
     /** Read a Q3 multipart file
@@ -269,13 +248,13 @@ protected:
     /** Try to read the skin for a MD3 file
      *  @param fill Receives output information
      */
-    void ReadSkin(Q3Shader::SkinData& fill) const;
+    void ReadSkin(Q3Shader::SkinData &fill) const;
 
     // -------------------------------------------------------------------
     /** Try to read the shader for a MD3 file
      *  @param fill Receives output information
      */
-    void ReadShader(Q3Shader::ShaderData& fill) const;
+    void ReadShader(Q3Shader::ShaderData &fill) const;
 
     // -------------------------------------------------------------------
     /** Convert a texture path in a MD3 file to a proper value
@@ -283,11 +262,10 @@ protected:
      *  @param[in] header_path Base path specified in MD3 header
      *  @param[out] out Receives the converted output string
      */
-    void ConvertPath(const char* texture_name, const char* header_path,
-        std::string& out) const;
+    void ConvertPath(const char *texture_name, const char *header_path,
+            std::string &out) const;
 
 protected:
-
     /** Configuration option: frame to be loaded */
     unsigned int configFrameID;
 
@@ -307,10 +285,10 @@ protected:
     bool configSpeedFlag;
 
     /** Header of the MD3 file */
-    BE_NCONST MD3::Header* pcHeader;
+    BE_NCONST MD3::Header *pcHeader;
 
     /** File buffer  */
-    BE_NCONST unsigned char* mBuffer;
+    BE_NCONST unsigned char *mBuffer;
 
     /** Size of the file, in bytes */
     unsigned int fileSize;
@@ -325,11 +303,11 @@ protected:
     std::string filename;
 
     /** Output scene to be filled */
-    aiScene* mScene;
+    aiScene *mScene;
 
     /** IO system to be used to access the data*/
-    IOSystem* mIOHandler;
-    };
+    IOSystem *mIOHandler;
+};
 
 } // end of namespace Assimp
 
diff --git a/code/AssetLib/MD5/MD5Loader.h b/code/AssetLib/MD5/MD5Loader.h
index 53b7afd3c..9486ffd84 100644
--- a/code/AssetLib/MD5/MD5Loader.h
+++ b/code/AssetLib/MD5/MD5Loader.h
@@ -43,12 +43,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief Definition of the .MD5 importer class.
  *  http://www.modwiki.net/wiki/MD5_(file_format)
 */
+#pragma once
 #ifndef AI_MD5LOADER_H_INCLUDED
 #define AI_MD5LOADER_H_INCLUDED
 
 #include "MD5Parser.h"
 #include <assimp/BaseImporter.h>
-
 #include <assimp/types.h>
 
 struct aiNode;
@@ -65,35 +65,35 @@ using namespace Assimp::MD5;
 class MD5Importer : public BaseImporter {
 public:
     MD5Importer();
-    ~MD5Importer();
+    ~MD5Importer() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
      * The function is a request to the importer to update its configuration
      * basing on the Importer's configuration property list.
      */
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details
      */
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Load a *.MD5MESH file.
diff --git a/code/AssetLib/MDC/MDCLoader.h b/code/AssetLib/MDC/MDCLoader.h
index d611b5e46..1d0243593 100644
--- a/code/AssetLib/MDC/MDCLoader.h
+++ b/code/AssetLib/MDC/MDCLoader.h
@@ -48,8 +48,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/types.h>
 
-#include <assimp/BaseImporter.h>
 #include "MDCFileData.h"
+#include <assimp/BaseImporter.h>
 #include <assimp/ByteSwapper.h>
 
 namespace Assimp {
@@ -59,45 +59,37 @@ using namespace MDC;
 // ---------------------------------------------------------------------------
 /** Importer class to load the RtCW MDC file format
 */
-class MDCImporter : public BaseImporter
-{
+class MDCImporter : public BaseImporter {
 public:
     MDCImporter();
-    ~MDCImporter();
-
-
-public:
+    ~MDCImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
-protected:
-
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Validate the header of the file
@@ -107,19 +99,17 @@ protected:
     // -------------------------------------------------------------------
     /** Validate the header of a MDC surface
     */
-    void ValidateSurfaceHeader(BE_NCONST MDC::Surface* pcSurf);
+    void ValidateSurfaceHeader(BE_NCONST MDC::Surface *pcSurf);
 
 protected:
-
-
     /** Configuration option: frame to be loaded */
     unsigned int configFrameID;
 
     /** Header of the MDC file */
-    BE_NCONST MDC::Header* pcHeader;
+    BE_NCONST MDC::Header *pcHeader;
 
     /** Buffer to hold the loaded file */
-    unsigned char* mBuffer;
+    unsigned char *mBuffer;
 
     /** size of the file, in bytes */
     unsigned int fileSize;
diff --git a/code/AssetLib/MDL/MDLLoader.h b/code/AssetLib/MDL/MDLLoader.h
index 47cbadcf2..e81fe0b4f 100644
--- a/code/AssetLib/MDL/MDLLoader.h
+++ b/code/AssetLib/MDL/MDLLoader.h
@@ -43,7 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /**  @file MDLLoader.h
  *   @brief Declaration of the loader for MDL files
  */
-
+#pragma once
 #ifndef AI_MDLLOADER_H_INCLUDED
 #define AI_MDLLOADER_H_INCLUDED
 
@@ -55,7 +55,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 struct aiNode;
 struct aiTexture;
 
-namespace Assimp    {
+namespace Assimp {
 
 using namespace MDL;
 
@@ -87,34 +87,34 @@ class MDLImporter : public BaseImporter
 {
 public:
     MDLImporter();
-    ~MDLImporter();
+    ~MDLImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer* pImp) override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Import a quake 1 MDL file (IDPO)
diff --git a/code/AssetLib/MDL/MDLMaterialLoader.cpp b/code/AssetLib/MDL/MDLMaterialLoader.cpp
index 31d28b8a3..fd287430b 100644
--- a/code/AssetLib/MDL/MDLMaterialLoader.cpp
+++ b/code/AssetLib/MDL/MDLMaterialLoader.cpp
@@ -43,10 +43,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef ASSIMP_BUILD_NO_MDL_IMPORTER
 
-// internal headers
 #include "MDLDefaultColorMap.h"
 #include "MDLLoader.h"
-#include <assimp/Defines.h>
+
 #include <assimp/StringUtils.h>
 #include <assimp/qnan.h>
 #include <assimp/scene.h>
diff --git a/code/AssetLib/MMD/MMDImporter.h b/code/AssetLib/MMD/MMDImporter.h
index 47a53af98..cfd903eee 100644
--- a/code/AssetLib/MMD/MMDImporter.h
+++ b/code/AssetLib/MMD/MMDImporter.h
@@ -59,19 +59,19 @@ public:
     MMDImporter();
 
     /// \brief  Destructor
-    ~MMDImporter();
+    ~MMDImporter() override;
 
 public:
     /// \brief  Returns whether the class can handle the format of the given file.
     /// \remark See BaseImporter::CanRead() for details.
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const;
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const override;
 
 private:
     //! \brief  Appends the supported extension.
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo() const override;
 
     //! \brief  File import implementation.
-    void InternReadFile(const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler);
+    void InternReadFile(const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
 
     //! \brief  Create the data from imported content.
     void CreateDataFromImport(const pmx::PmxModel* pModel, aiScene* pScene);
diff --git a/code/AssetLib/MS3D/MS3DLoader.h b/code/AssetLib/MS3D/MS3DLoader.h
index aa37484a5..4e42156f9 100644
--- a/code/AssetLib/MS3D/MS3DLoader.h
+++ b/code/AssetLib/MS3D/MS3DLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  MS3DLoader.h
  *  @brief Declaration of the MS3D importer class.
  */
+#pragma once
 #ifndef AI_MS3DLOADER_H_INCLUDED
 #define AI_MS3DLOADER_H_INCLUDED
 
@@ -50,65 +50,53 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StreamReader.h>
 struct aiNode;
 
-namespace Assimp    {
+namespace Assimp {
 
 // ----------------------------------------------------------------------------------------------
 /** Milkshape 3D importer implementation */
 // ----------------------------------------------------------------------------------------------
-class MS3DImporter
-    : public BaseImporter
-{
-
+class MS3DImporter : public BaseImporter {
 public:
-
     MS3DImporter();
-    ~MS3DImporter();
-
-public:
+    ~MS3DImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details */
-    const aiImporterDesc* GetInfo () const;
-
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
     struct TempJoint;
-    void CollectChildJoints(const std::vector<TempJoint>& joints, std::vector<bool>& hadit, aiNode* nd,const aiMatrix4x4& absTrafo);
-    void CollectChildJoints(const std::vector<TempJoint>& joints, aiNode* nd);
+    void CollectChildJoints(const std::vector<TempJoint> &joints, std::vector<bool> &hadit, aiNode *nd, const aiMatrix4x4 &absTrafo);
+    void CollectChildJoints(const std::vector<TempJoint> &joints, aiNode *nd);
 
-    template<typename T> void ReadComments(StreamReaderLE& stream, std::vector<T>& outp);
-private:
-
-    aiScene* mScene;
+    template <typename T>
+    void ReadComments(StreamReaderLE &stream, std::vector<T> &outp);
 
 private:
+    aiScene *mScene;
 
-    struct TempVertex
-    {
+private:
+    struct TempVertex {
         aiVector3D pos;
         unsigned int bone_id[4], ref_cnt;
         float weights[4];
     };
 
-    struct TempTriangle
-    {
+    struct TempTriangle {
         unsigned int indices[3];
         aiVector3D normals[3];
         aiVector2D uv[3];
@@ -116,34 +104,30 @@ private:
         unsigned int sg, group;
     };
 
-    struct TempGroup
-    {
+    struct TempGroup {
         char name[33]; // +0
         std::vector<unsigned int> triangles;
         unsigned int mat; // 0xff is no material
         std::string comment;
     };
 
-    struct TempMaterial
-    {
+    struct TempMaterial {
         // again, add an extra 0 character to all strings -
         char name[33];
         char texture[129];
         char alphamap[129];
 
-        aiColor4D diffuse,specular,ambient,emissive;
-        float shininess,transparency;
+        aiColor4D diffuse, specular, ambient, emissive;
+        float shininess, transparency;
         std::string comment;
     };
 
-    struct TempKeyFrame
-    {
+    struct TempKeyFrame {
         float time;
         aiVector3D value;
     };
 
-    struct TempJoint
-    {
+    struct TempJoint {
         char name[33];
         char parentName[33];
         aiVector3D rotation, position;
@@ -158,5 +142,5 @@ private:
     //};
 };
 
-}
+} // namespace Assimp
 #endif
diff --git a/code/AssetLib/NDO/NDOLoader.h b/code/AssetLib/NDO/NDOLoader.h
index 06a69c1a8..fb619b8cb 100644
--- a/code/AssetLib/NDO/NDOLoader.h
+++ b/code/AssetLib/NDO/NDOLoader.h
@@ -44,19 +44,18 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef INCLUDED_AI_NDO_LOADER_H
 #define INCLUDED_AI_NDO_LOADER_H
 
-#include <assimp/vector3.h>
 #include <assimp/BaseImporter.h>
-#include <stdint.h>
+#include <assimp/vector3.h>
+#include <cstdint>
 #include <string>
 #include <vector>
 
-
 struct aiImporterDesc;
 struct aiScene;
 
-namespace Assimp    {
-    class IOSystem;
-    class Importer;
+namespace Assimp {
+class IOSystem;
+class Importer;
 
 // ---------------------------------------------------------------------------
 /** @brief Importer class to load meshes from Nendo.
@@ -64,38 +63,30 @@ namespace Assimp    {
  *  Basing on
  *  <blender>/blender/release/scripts/nendo_import.py by Anthony D'Agostino.
 */
-class NDOImporter : public BaseImporter
-{
+class NDOImporter : public BaseImporter {
 public:
     NDOImporter();
-    ~NDOImporter();
-
-
-public:
+    ~NDOImporter() override;
 
     //! Represents a single edge
-    struct Edge
-    {
+    struct Edge {
         unsigned int edge[8];
         unsigned int hard;
         uint8_t color[8];
     };
 
     //! Represents a single face
-    struct Face
-    {
+    struct Face {
         unsigned int elem;
     };
 
-    struct Vertex
-    {
+    struct Vertex {
         unsigned int num;
         aiVector3D val;
     };
 
     //! Represents a single object
-    struct Object
-    {
+    struct Object {
         std::string name;
 
         std::vector<Edge> edges;
@@ -104,23 +95,22 @@ public:
     };
 
     // -------------------------------------------------------------------
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
+    // -------------------------------------------------------------------
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
-    const aiImporterDesc* GetInfo () const;
+    void SetupProperties(const Importer *pImp) override;
 
     // -------------------------------------------------------------------
-    void SetupProperties(const Importer* pImp);
-
-    // -------------------------------------------------------------------
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
-private:
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 }; // end of class NDOImporter
+
 } // end of namespace Assimp
+
 #endif // INCLUDED_AI_NDO_LOADER_H
diff --git a/code/AssetLib/NFF/NFFLoader.h b/code/AssetLib/NFF/NFFLoader.h
index ec8caba68..514476c12 100644
--- a/code/AssetLib/NFF/NFFLoader.h
+++ b/code/AssetLib/NFF/NFFLoader.h
@@ -43,16 +43,16 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file NFFLoader.h
  *  @brief Declaration of the NFF importer class.
  */
+#pragma once
 #ifndef AI_NFFLOADER_H_INCLUDED
 #define AI_NFFLOADER_H_INCLUDED
 
 #include <assimp/BaseImporter.h>
-#include <assimp/types.h>
 #include <assimp/material.h>
+#include <assimp/types.h>
 #include <vector>
 
-
-namespace Assimp    {
+namespace Assimp {
 
 // ----------------------------------------------------------------------------------
 /** NFF (Neutral File Format) Importer class.
@@ -61,67 +61,56 @@ namespace Assimp    {
  * Both are quite different and the loading code is somewhat dirty at
  * the moment. Sense8 should be moved to a separate loader.
 */
-class NFFImporter : public BaseImporter
-{
+class NFFImporter : public BaseImporter {
 public:
     NFFImporter();
-    ~NFFImporter();
-
-
-public:
+    ~NFFImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 
 private:
-
-
     // describes face material properties
-    struct ShadingInfo
-    {
-        ShadingInfo()
-            : color     (0.6f,0.6f,0.6f)
-            , diffuse   (1.f,1.f,1.f)
-            , specular  (1.f,1.f,1.f)
-            , ambient   (0.f,0.f,0.f)
-            , emissive  (0.f,0.f,0.f)
-            , refracti  (1.f)
-            , twoSided  (false) // for NFF2
-            , shaded    (true)  // for NFF2
-            , opacity   (1.f)
-            , shininess (0.f)
-            , mapping   (aiTextureMapping_UV)
-        {}
+    struct ShadingInfo {
+        ShadingInfo() :
+                color(0.6f, 0.6f, 0.6f),
+                diffuse(1.f, 1.f, 1.f),
+                specular(1.f, 1.f, 1.f),
+                ambient(0.f, 0.f, 0.f),
+                emissive(0.f, 0.f, 0.f),
+                refracti(1.f),
+                twoSided(false), // for NFF2
+                shaded(true), // for NFF2
+                opacity(1.f),
+                shininess(0.f),
+                mapping(aiTextureMapping_UV) {
+            // empty
+        }
 
-        aiColor3D color,diffuse,specular,ambient,emissive;
+        aiColor3D color, diffuse, specular, ambient, emissive;
         ai_real refracti;
-
-        std::string texFile;
-
-        // For NFF2
-        bool twoSided;
+        std::string texFile;        
+        bool twoSided; // For NFF2
         bool shaded;
         ai_real opacity, shininess;
-
         std::string name;
 
         // texture mapping to be generated for the mesh - uv is the default
@@ -130,16 +119,15 @@ private:
         aiTextureMapping mapping;
 
         // shininess is ignored for the moment
-        bool operator == (const ShadingInfo& other) const
-        {
-            return color == other.color     &&
-                diffuse  == other.diffuse   &&
-                specular == other.specular  &&
-                ambient  == other.ambient   &&
-                refracti == other.refracti  &&
-                texFile  == other.texFile   &&
-                twoSided == other.twoSided  &&
-                shaded   == other.shaded;
+        bool operator == (const ShadingInfo &other) const {
+            return color == other.color &&
+                   diffuse == other.diffuse &&
+                   specular == other.specular &&
+                   ambient == other.ambient &&
+                   refracti == other.refracti &&
+                   texFile == other.texFile &&
+                   twoSided == other.twoSided &&
+                   shaded == other.shaded;
 
             // Some properties from NFF2 aren't compared by this operator.
             // Comparing MeshInfo::matIndex should do that.
@@ -147,35 +135,25 @@ private:
     };
 
     // describes a NFF light source
-    struct Light
-    {
-        Light()
-            : intensity (1.f)
-            , color     (1.f,1.f,1.f)
-        {}
+    struct Light {
+        Light() :
+                intensity(1.f), color(1.f, 1.f, 1.f) {}
 
         aiVector3D position;
         ai_real intensity;
         aiColor3D color;
     };
 
-    enum PatchType
-    {
+    enum PatchType {
         PatchType_Simple = 0x0,
         PatchType_Normals = 0x1,
         PatchType_UVAndNormals = 0x2
     };
 
     // describes a NFF mesh
-    struct MeshInfo
-    {
-        MeshInfo(PatchType _pType, bool bL = false)
-            : pType     (_pType)
-            , bLocked   (bL)
-            , radius    (1.f,1.f,1.f)
-            , dir       (0.f,1.f,0.f)
-            , matIndex  (0)
-        {
+    struct MeshInfo {
+        MeshInfo(PatchType _pType, bool bL = false) :
+                pType(_pType), bLocked(bL), radius(1.f, 1.f, 1.f), dir(0.f, 1.f, 0.f), matIndex(0) {
             name[0] = '\0'; // by default meshes are unnamed
         }
 
@@ -192,11 +170,10 @@ private:
         std::vector<unsigned int> faces;
 
         // for NFF2
-        std::vector<aiColor4D>  colors;
+        std::vector<aiColor4D> colors;
         unsigned int matIndex;
     };
 
-
     // -------------------------------------------------------------------
     /** Loads the material table for the NFF2 file format from an
      *  external file.
@@ -205,9 +182,8 @@ private:
      *  @param path Path to the file (abs. or rel.)
      *  @param pIOHandler IOSystem to be used to open the file
     */
-    void LoadNFF2MaterialTable(std::vector<ShadingInfo>& output,
-        const std::string& path, IOSystem* pIOHandler);
-
+    void LoadNFF2MaterialTable(std::vector<ShadingInfo> &output,
+            const std::string &path, IOSystem *pIOHandler);
 };
 
 } // end of namespace Assimp
diff --git a/code/AssetLib/OFF/OFFLoader.cpp b/code/AssetLib/OFF/OFFLoader.cpp
index 06c7b1903..8509d0c4d 100644
--- a/code/AssetLib/OFF/OFFLoader.cpp
+++ b/code/AssetLib/OFF/OFFLoader.cpp
@@ -5,8 +5,6 @@ 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,
diff --git a/code/AssetLib/OFF/OFFLoader.h b/code/AssetLib/OFF/OFFLoader.h
index 208fea3b7..9d1136b6c 100644
--- a/code/AssetLib/OFF/OFFLoader.h
+++ b/code/AssetLib/OFF/OFFLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  OFFLoader.h
  *  @brief Declaration of the OFF importer class.
  */
+#pragma once
 #ifndef AI_OFFLOADER_H_INCLUDED
 #define AI_OFFLOADER_H_INCLUDED
 
@@ -50,43 +50,35 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/types.h>
 #include <vector>
 
-namespace Assimp    {
+namespace Assimp {
 
 // ---------------------------------------------------------------------------
 /** Importer class for the Object File Format (.off)
 */
-class OFFImporter : public BaseImporter
-{
+class OFFImporter : public BaseImporter {
 public:
     OFFImporter();
-    ~OFFImporter();
-
-
-public:
+    ~OFFImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+            bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
-    void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
-private:
-
+    void InternReadFile(const std::string &pFile, aiScene *pScene,
+            IOSystem *pIOHandler) override;
 };
 
 } // end of namespace Assimp
diff --git a/code/AssetLib/Obj/ObjFileData.h b/code/AssetLib/Obj/ObjFileData.h
index 5982be44d..92fe3a261 100644
--- a/code/AssetLib/Obj/ObjFileData.h
+++ b/code/AssetLib/Obj/ObjFileData.h
@@ -60,7 +60,7 @@ struct Material;
 //! \brief  Data structure for a simple obj-face, describes discredit,l.ation and materials
 // ------------------------------------------------------------------------------------------------
 struct Face {
-    typedef std::vector<unsigned int> IndexArray;
+    using IndexArray = std::vector<unsigned int>;
 
     //! Primitive type
     aiPrimitiveType m_PrimitiveType;
@@ -122,7 +122,6 @@ struct Object {
 struct Material {
     //! Name of material description
     aiString MaterialName;
-
     //! Texture names
     aiString texture;
     aiString textureSpecular;
@@ -237,9 +236,9 @@ struct Mesh {
 //! \brief  Data structure to store all obj-specific model datas
 // ------------------------------------------------------------------------------------------------
 struct Model {
-    typedef std::map<std::string, std::vector<unsigned int> *> GroupMap;
-    typedef std::map<std::string, std::vector<unsigned int> *>::iterator GroupMapIt;
-    typedef std::map<std::string, std::vector<unsigned int> *>::const_iterator ConstGroupMapIt;
+    using GroupMap = std::map<std::string, std::vector<unsigned int> *>;
+    using GroupMapIt = std::map<std::string, std::vector<unsigned int> *>::iterator;
+    using ConstGroupMapIt = std::map<std::string, std::vector<unsigned int> *>::const_iterator;
 
     //! Model name
     std::string m_ModelName;
@@ -278,12 +277,12 @@ struct Model {
 
     //! \brief  The default class constructor
     Model() :
-            m_ModelName(""),
+            m_ModelName(),
             m_pCurrent(nullptr),
             m_pCurrentMaterial(nullptr),
             m_pDefaultMaterial(nullptr),
             m_pGroupFaceIDs(nullptr),
-            m_strActiveGroup(""),
+            m_strActiveGroup(),
             m_TextureCoordDim(0),
             m_pCurrentMesh(nullptr) {
         // empty
@@ -291,27 +290,17 @@ struct Model {
 
     //! \brief  The class destructor
     ~Model() {
-        // Clear all stored object instances
-        for (std::vector<Object *>::iterator it = m_Objects.begin();
-                it != m_Objects.end(); ++it) {
-            delete *it;
+        for (auto & it : m_Objects) {
+            delete it;
         }
-        m_Objects.clear();
-
-        // Clear all stored mesh instances
-        for (std::vector<Mesh *>::iterator it = m_Meshes.begin();
-                it != m_Meshes.end(); ++it) {
-            delete *it;
+        for (auto & Meshe : m_Meshes) {
+            delete Meshe;
         }
-        m_Meshes.clear();
-
-        for (GroupMapIt it = m_Groups.begin(); it != m_Groups.end(); ++it) {
-            delete it->second;
+        for (auto & Group : m_Groups) {
+            delete Group.second;
         }
-        m_Groups.clear();
-
-        for (std::map<std::string, Material *>::iterator it = m_MaterialMap.begin(); it != m_MaterialMap.end(); ++it) {
-            delete it->second;
+        for (auto & it : m_MaterialMap) {
+            delete it.second;
         }
     }
 };
diff --git a/code/AssetLib/Obj/ObjFileImporter.h b/code/AssetLib/Obj/ObjFileImporter.h
index 8b2a9c5c8..e76c27950 100644
--- a/code/AssetLib/Obj/ObjFileImporter.h
+++ b/code/AssetLib/Obj/ObjFileImporter.h
@@ -38,6 +38,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
+#pragma once
 #ifndef OBJ_FILE_IMPORTER_H_INC
 #define OBJ_FILE_IMPORTER_H_INC
 
@@ -65,19 +66,18 @@ public:
     ObjFileImporter();
 
     /// \brief  Destructor
-    ~ObjFileImporter();
+    ~ObjFileImporter() override;
 
-public:
     /// \brief  Returns whether the class can handle the format of the given file.
     /// \remark See BaseImporter::CanRead() for details.
-    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
 
-private:
+protected:
     //! \brief  Appends the supported extension.
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     //! \brief  File import implementation.
-    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler);
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
 
     //! \brief  Create the data from imported content.
     void CreateDataFromImport(const ObjFile::Model *pModel, aiScene *pScene);
diff --git a/code/AssetLib/Obj/ObjFileMtlImporter.h b/code/AssetLib/Obj/ObjFileMtlImporter.h
index a48ee78e0..cda7415e6 100644
--- a/code/AssetLib/Obj/ObjFileMtlImporter.h
+++ b/code/AssetLib/Obj/ObjFileMtlImporter.h
@@ -61,9 +61,9 @@ struct Material;
 class ObjFileMtlImporter {
 public:
     static const size_t BUFFERSIZE = 2048;
-    typedef std::vector<char> DataArray;
-    typedef std::vector<char>::iterator DataArrayIt;
-    typedef std::vector<char>::const_iterator ConstDataArrayIt;
+    using DataArray = std::vector<char>;
+    using DataArrayIt = std::vector<char>::iterator;
+    using ConstDataArrayIt = std::vector<char>::const_iterator;
 
     //! \brief  The class default constructor
     ObjFileMtlImporter(std::vector<char> &buffer, const std::string &strAbsPath,
diff --git a/code/AssetLib/Obj/ObjFileParser.h b/code/AssetLib/Obj/ObjFileParser.h
index 5d7ce065a..f3791c549 100644
--- a/code/AssetLib/Obj/ObjFileParser.h
+++ b/code/AssetLib/Obj/ObjFileParser.h
@@ -73,7 +73,6 @@ public:
     typedef std::vector<char>::iterator DataArrayIt;
     typedef std::vector<char>::const_iterator ConstDataArrayIt;
 
-public:
     /// @brief  The default constructor.
     ObjFileParser();
     /// @brief  Constructor with data array.
diff --git a/code/AssetLib/Ogre/OgreImporter.cpp b/code/AssetLib/Ogre/OgreImporter.cpp
index a2349859e..5250dbe5e 100644
--- a/code/AssetLib/Ogre/OgreImporter.cpp
+++ b/code/AssetLib/Ogre/OgreImporter.cpp
@@ -81,10 +81,10 @@ bool OgreImporter::CanRead(const std::string &pFile, Assimp::IOSystem *pIOHandle
     if (EndsWith(pFile, ".mesh.xml", false)) {
         static const char * const tokens[] = { "<mesh>" };
         return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    } else {
-        /// @todo Read and validate first header chunk?
-        return EndsWith(pFile, ".mesh", false);
     }
+
+    /// @todo Read and validate first header chunk?
+    return EndsWith(pFile, ".mesh", false);
 }
 
 void OgreImporter::InternReadFile(const std::string &pFile, aiScene *pScene, Assimp::IOSystem *pIOHandler) {
@@ -110,28 +110,27 @@ void OgreImporter::InternReadFile(const std::string &pFile, aiScene *pScene, Ass
 
         // Convert to Assimp
         mesh->ConvertToAssimpScene(pScene);
+        return;
     }
     // XML .mesh.xml import
-    else {
-        /// @note XmlReader does not take ownership of f, hence the scoped ptr.
-        std::unique_ptr<IOStream> scopedFile(f);
-        XmlParser xmlParser;
+    /// @note XmlReader does not take ownership of f, hence the scoped ptr.
+    std::unique_ptr<IOStream> scopedFile(f);
+    XmlParser xmlParser;
 
-        //std::unique_ptr<CIrrXML_IOStreamReader> xmlStream(new CIrrXML_IOStreamReader(scopedFile.get()));
-        //std::unique_ptr<XmlReader> reader(irr::io::createIrrXMLReader(xmlStream.get()));
-        xmlParser.parse(scopedFile.get());
-        // Import mesh
-        std::unique_ptr<MeshXml> mesh(OgreXmlSerializer::ImportMesh(&xmlParser));
+    //std::unique_ptr<CIrrXML_IOStreamReader> xmlStream(new CIrrXML_IOStreamReader(scopedFile.get()));
+    //std::unique_ptr<XmlReader> reader(irr::io::createIrrXMLReader(xmlStream.get()));
+    xmlParser.parse(scopedFile.get());
+    // Import mesh
+    std::unique_ptr<MeshXml> mesh(OgreXmlSerializer::ImportMesh(&xmlParser));
 
-        // Import skeleton
-        OgreXmlSerializer::ImportSkeleton(pIOHandler, mesh.get());
+    // Import skeleton
+    OgreXmlSerializer::ImportSkeleton(pIOHandler, mesh.get());
 
-        // Import mesh referenced materials
-        ReadMaterials(pFile, pIOHandler, pScene, mesh.get());
+    // Import mesh referenced materials
+    ReadMaterials(pFile, pIOHandler, pScene, mesh.get());
 
-        // Convert to Assimp
-        mesh->ConvertToAssimpScene(pScene);
-    }
+    // Convert to Assimp
+    mesh->ConvertToAssimpScene(pScene);
 }
 
 } // namespace Ogre
diff --git a/code/AssetLib/Ogre/OgreImporter.h b/code/AssetLib/Ogre/OgreImporter.h
index d753ca39f..b1a07d4f0 100644
--- a/code/AssetLib/Ogre/OgreImporter.h
+++ b/code/AssetLib/Ogre/OgreImporter.h
@@ -4,7 +4,6 @@ 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,
@@ -39,64 +38,61 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
-
+#pragma once
 #ifndef AI_OGREIMPORTER_H_INC
 #define AI_OGREIMPORTER_H_INC
 
 #ifndef ASSIMP_BUILD_NO_OGRE_IMPORTER
 
 #include <assimp/BaseImporter.h>
-
-#include "OgreStructs.h"
-#include "OgreParsingUtils.h"
-
 #include <assimp/material.h>
 
-namespace Assimp
-{
-namespace Ogre
-{
+#include "OgreParsingUtils.h"
+#include "OgreStructs.h"
+
+namespace Assimp {
+namespace Ogre {
 
 /** Importer for Ogre mesh, skeleton and material formats.
     @todo Support vertex colors.
     @todo Support poses/animations from the mesh file.
     Currently only skeleton file animations are supported. */
-class OgreImporter : public BaseImporter
-{
+class OgreImporter : public BaseImporter {
 public:
     /// BaseImporter override.
-    virtual bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const;
+    virtual bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
+
+protected:
+    /// BaseImporter override.
+    virtual void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
 
     /// BaseImporter override.
-    virtual void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler);
+    virtual const aiImporterDesc *GetInfo() const override;
 
     /// BaseImporter override.
-    virtual const aiImporterDesc *GetInfo() const;
-
-    /// BaseImporter override.
-    virtual void SetupProperties(const Importer *pImp);
+    virtual void SetupProperties(const Importer *pImp) override;
 
 private:
     /// Read materials referenced by the @c mesh to @c pScene.
     void ReadMaterials(const std::string &pFile, Assimp::IOSystem *pIOHandler, aiScene *pScene, Mesh *mesh);
     void ReadMaterials(const std::string &pFile, Assimp::IOSystem *pIOHandler, aiScene *pScene, MeshXml *mesh);
-    void AssignMaterials(aiScene *pScene, std::vector<aiMaterial*> &materials);
+    void AssignMaterials(aiScene *pScene, std::vector<aiMaterial *> &materials);
 
     /// Reads material
-    aiMaterial* ReadMaterial(const std::string &pFile, Assimp::IOSystem *pIOHandler, const std::string &MaterialName);
+    aiMaterial *ReadMaterial(const std::string &pFile, Assimp::IOSystem *pIOHandler, const std::string &MaterialName);
 
     // These functions parse blocks from a material file from @c ss. Starting parsing from "{" and ending it to "}".
     bool ReadTechnique(const std::string &techniqueName, std::stringstream &ss, aiMaterial *material);
     bool ReadPass(const std::string &passName, std::stringstream &ss, aiMaterial *material);
     bool ReadTextureUnit(const std::string &textureUnitName, std::stringstream &ss, aiMaterial *material);
 
+private:
     std::string m_userDefinedMaterialLibFile;
     bool m_detectTextureTypeFromFilename;
-
     std::map<aiTextureType, unsigned int> m_textures;
 };
-} // Ogre
-} // Assimp
+} // namespace Ogre
+} // namespace Assimp
 
 #endif // ASSIMP_BUILD_NO_OGRE_IMPORTER
 #endif // AI_OGREIMPORTER_H_INC
diff --git a/code/AssetLib/OpenGEX/OpenGEXExporter.h b/code/AssetLib/OpenGEX/OpenGEXExporter.h
index c17dad2b8..dc24fdc16 100644
--- a/code/AssetLib/OpenGEX/OpenGEXExporter.h
+++ b/code/AssetLib/OpenGEX/OpenGEXExporter.h
@@ -4,7 +4,6 @@ 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,
@@ -39,6 +38,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
+#pragma once
 #ifndef AI_OPENGEX_EXPORTER_H
 #define AI_OPENGEX_EXPORTER_H
 
diff --git a/code/AssetLib/OpenGEX/OpenGEXImporter.cpp b/code/AssetLib/OpenGEX/OpenGEXImporter.cpp
index 0f224ea28..bbf689b60 100644
--- a/code/AssetLib/OpenGEX/OpenGEXImporter.cpp
+++ b/code/AssetLib/OpenGEX/OpenGEXImporter.cpp
@@ -47,14 +47,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StringComparison.h>
 #include <assimp/StringUtils.h>
 #include <assimp/DefaultLogger.hpp>
-
 #include <assimp/ai_assert.h>
 #include <assimp/importerdesc.h>
 #include <assimp/scene.h>
 #include <openddlparser/OpenDDLParser.h>
 
-#include <vector>
-
 static const aiImporterDesc desc = {
     "Open Game Engine Exchange",
     "",
@@ -290,7 +287,6 @@ OpenGEXImporter::OpenGEXImporter() :
 
 //------------------------------------------------------------------------------------------------
 OpenGEXImporter::~OpenGEXImporter() {
-    m_ctx = nullptr;
 }
 
 //------------------------------------------------------------------------------------------------
diff --git a/code/AssetLib/OpenGEX/OpenGEXImporter.h b/code/AssetLib/OpenGEX/OpenGEXImporter.h
index 3c26a4a30..92841b5d3 100644
--- a/code/AssetLib/OpenGEX/OpenGEXImporter.h
+++ b/code/AssetLib/OpenGEX/OpenGEXImporter.h
@@ -39,6 +39,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
+#pragma once
 #ifndef AI_OPENGEX_IMPORTER_H
 #define AI_OPENGEX_IMPORTER_H
 
@@ -96,21 +97,21 @@ public:
     OpenGEXImporter();
 
     /// The class destructor.
-    virtual ~OpenGEXImporter();
+    ~OpenGEXImporter() override;
 
     /// BaseImporter override.
-    virtual bool CanRead( const std::string &file, IOSystem *pIOHandler, bool checkSig ) const;
-
-    /// BaseImporter override.
-    virtual void InternReadFile( const std::string &file, aiScene *pScene, IOSystem *pIOHandler );
-
-    /// BaseImporter override.
-    virtual const aiImporterDesc *GetInfo() const;
-
-    /// BaseImporter override.
-    virtual void SetupProperties( const Importer *pImp );
+    bool CanRead( const std::string &file, IOSystem *pIOHandler, bool checkSig ) const override;
 
 protected:
+    /// BaseImporter override.
+    void InternReadFile( const std::string &file, aiScene *pScene, IOSystem *pIOHandler ) override;
+
+    /// BaseImporter override.
+    virtual const aiImporterDesc *GetInfo() const override;
+
+    /// BaseImporter override.
+    virtual void SetupProperties( const Importer *pImp ) override;
+
     void handleNodes( ODDLParser::DDLNode *node, aiScene *pScene );
     void handleMetricNode( ODDLParser::DDLNode *node, aiScene *pScene );
     void handleNameNode( ODDLParser::DDLNode *node, aiScene *pScene );
@@ -176,15 +177,15 @@ private:
     };
 
     struct ChildInfo {
-        typedef std::list<aiNode*> NodeList;
+        using NodeList = std::list<aiNode*>;
         std::list<aiNode*> m_children;
     };
     ChildInfo *m_root;
-    typedef std::map<aiNode*, std::unique_ptr<ChildInfo> > NodeChildMap;
+    using NodeChildMap = std::map<aiNode*, std::unique_ptr<ChildInfo> >;
     NodeChildMap m_nodeChildMap;
 
     std::vector<std::unique_ptr<aiMesh> > m_meshCache;
-    typedef std::map<std::string, size_t> ReferenceMap;
+    using ReferenceMap = std::map<std::string, size_t>;
     std::map<std::string, size_t> m_mesh2refMap;
     std::map<std::string, size_t> m_material2refMap;
 
diff --git a/code/AssetLib/Ply/PlyLoader.h b/code/AssetLib/Ply/PlyLoader.h
index a41330c90..4f50400dd 100644
--- a/code/AssetLib/Ply/PlyLoader.h
+++ b/code/AssetLib/Ply/PlyLoader.h
@@ -42,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  PLYLoader.h
  *  @brief Declaration of the .ply importer class.
  */
+#pragma once
 #ifndef AI_PLYLOADER_H_INCLUDED
 #define AI_PLYLOADER_H_INCLUDED
 
@@ -64,14 +65,14 @@ using namespace PLY;
 class PLYImporter : public BaseImporter {
 public:
     PLYImporter();
-    ~PLYImporter();
+    ~PLYImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Extract a vertex from the DOM
@@ -88,14 +89,14 @@ protected:
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Extract a material list from the DOM
diff --git a/code/AssetLib/Ply/PlyParser.h b/code/AssetLib/Ply/PlyParser.h
index cbc51d4f7..dd1ce900a 100644
--- a/code/AssetLib/Ply/PlyParser.h
+++ b/code/AssetLib/Ply/PlyParser.h
@@ -48,8 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/IOStreamBuffer.h>
 #include <vector>
 
-namespace Assimp
-{
+namespace Assimp {
 
 //pre-declaration
 class PLYImporter;
diff --git a/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp b/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
index a1da8fd74..897bcb994 100644
--- a/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
+++ b/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
@@ -146,9 +146,6 @@ Q3BSPFileImporter::Q3BSPFileImporter() :
 // ------------------------------------------------------------------------------------------------
 //  Destructor.
 Q3BSPFileImporter::~Q3BSPFileImporter() {
-    m_pCurrentMesh = nullptr;
-    m_pCurrentFace = nullptr;
-
     // Clear face-to-material map
     for (FaceMap::iterator it = m_MaterialLookupMap.begin(); it != m_MaterialLookupMap.end(); ++it) {
         const std::string &matName = it->first;
@@ -156,7 +153,6 @@ Q3BSPFileImporter::~Q3BSPFileImporter() {
             delete it->second;
         }
     }
-    m_MaterialLookupMap.clear();
 }
 
 // ------------------------------------------------------------------------------------------------
diff --git a/code/AssetLib/Q3BSP/Q3BSPFileImporter.h b/code/AssetLib/Q3BSP/Q3BSPFileImporter.h
index 466ea1650..d1f420770 100644
--- a/code/AssetLib/Q3BSP/Q3BSPFileImporter.h
+++ b/code/AssetLib/Q3BSP/Q3BSPFileImporter.h
@@ -4,7 +4,6 @@ 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,
@@ -71,19 +70,19 @@ public:
     Q3BSPFileImporter();
 
     /// @brief  Destructor.
-    ~Q3BSPFileImporter();
+    ~Q3BSPFileImporter() override;
 
     /// @brief  Returns whether the class can handle the format of the given file.
     /// @remark See BaseImporter::CanRead() for details.
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig ) const;
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig ) const override;
 
 protected:
-    typedef std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>*> FaceMap;
-    typedef std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>* >::iterator FaceMapIt;
-    typedef std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>*>::const_iterator FaceMapConstIt;
+    using FaceMap = std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>*>;
+    using FaceMapIt = std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>* >::iterator;
+    using FaceMapConstIt = std::map<std::string, std::vector<Q3BSP::sQ3BSPFace*>*>::const_iterator;
 
-    const aiImporterDesc* GetInfo () const;
-    void InternReadFile(const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler);
+    const aiImporterDesc* GetInfo () const override;
+    void InternReadFile(const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler) override;
     void separateMapName( const std::string &rImportName, std::string &rArchiveName, std::string &rMapName );
     bool findFirstMapInArchive(ZipArchiveIOSystem &rArchive, std::string &rMapName );
     void CreateDataFromImport( const Q3BSP::Q3BSPModel *pModel, aiScene* pScene, ZipArchiveIOSystem *pArchive );
diff --git a/code/AssetLib/Q3BSP/Q3BSPFileParser.cpp b/code/AssetLib/Q3BSP/Q3BSPFileParser.cpp
index 9269e1e2b..45b2effb3 100644
--- a/code/AssetLib/Q3BSP/Q3BSPFileParser.cpp
+++ b/code/AssetLib/Q3BSP/Q3BSPFileParser.cpp
@@ -4,7 +4,6 @@ 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,
@@ -78,7 +77,6 @@ Q3BSPFileParser::Q3BSPFileParser( const std::string &mapName, ZipArchiveIOSystem
 // ------------------------------------------------------------------------------------------------
 Q3BSPFileParser::~Q3BSPFileParser() {
     delete m_pModel;
-    m_pModel = nullptr;
 }
 
 // ------------------------------------------------------------------------------------------------
diff --git a/code/AssetLib/Q3BSP/Q3BSPFileParser.h b/code/AssetLib/Q3BSP/Q3BSPFileParser.h
index 7dedb4c3f..6a6f0e326 100644
--- a/code/AssetLib/Q3BSP/Q3BSPFileParser.h
+++ b/code/AssetLib/Q3BSP/Q3BSPFileParser.h
@@ -4,7 +4,6 @@ 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,
@@ -57,9 +56,9 @@ namespace Q3BSP
 }
 
 // -------------------------------------------------------------------
+///	@brief  This class implements th Q3DSP file parsing.
 // -------------------------------------------------------------------
-class Q3BSPFileParser
-{
+class Q3BSPFileParser {
 public:
     Q3BSPFileParser( const std::string &rMapName, ZipArchiveIOSystem *pZipArchive );
     ~Q3BSPFileParser();
diff --git a/code/AssetLib/Q3D/Q3DLoader.h b/code/AssetLib/Q3D/Q3DLoader.h
index 73483ae12..c48427098 100644
--- a/code/AssetLib/Q3D/Q3DLoader.h
+++ b/code/AssetLib/Q3D/Q3DLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -36,80 +35,66 @@ 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  Q3DLoader.h
  *  @brief Declaration of the Q3D importer class.
  */
+#pragma once
 #ifndef AI_Q3DLOADER_H_INCLUDED
 #define AI_Q3DLOADER_H_INCLUDED
 
 #include <assimp/BaseImporter.h>
 #include <assimp/types.h>
 #include <vector>
-#include <stdint.h>
+#include <cstdint>
 
 namespace Assimp    {
 
 // ---------------------------------------------------------------------------
 /** Importer class for the Quick3D Object and Scene formats.
 */
-class Q3DImporter : public BaseImporter
-{
+class Q3DImporter : public BaseImporter {
 public:
     Q3DImporter();
-    ~Q3DImporter();
-
-
-public:
+    ~Q3DImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.  */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
 private:
-
-    struct Material
-    {
-        Material()
-            :   diffuse         (0.6f,0.6f,0.6f)
-            ,   transparency    (0.f)
-            ,   texIdx          (UINT_MAX)
-        {}
+    struct Material {
+        Material() : diffuse(0.6f,0.6f,0.6f), transparency(0.f), texIdx(UINT_MAX) {
+            // empty
+        }
 
         aiString name;
         aiColor3D ambient, diffuse, specular;
         float transparency;
-
         unsigned int texIdx;
     };
 
-    struct Face
-    {
-        explicit Face(unsigned int s)
-            :   indices   (s)
-            ,   uvindices (s)
-            ,   mat       (0)
-        {
+    struct Face {
+        explicit Face(unsigned int s) : indices(s), uvindices(s), mat(0) {
+            // empty
         }
 
         std::vector<unsigned int> indices;
@@ -117,14 +102,11 @@ private:
         unsigned int mat;
     };
 
-    struct Mesh
-    {
-
+    struct Mesh {
         std::vector<aiVector3D> verts;
         std::vector<aiVector3D> normals;
         std::vector<aiVector3D> uv;
         std::vector<Face>       faces;
-
         uint32_t prevUVIdx;
     };
 };
diff --git a/code/AssetLib/Raw/RawLoader.h b/code/AssetLib/Raw/RawLoader.h
index d744109d1..8941a2d19 100644
--- a/code/AssetLib/Raw/RawLoader.h
+++ b/code/AssetLib/Raw/RawLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  RAWLoader.h
  *  @brief Declaration of the RAW importer class.
  */
+#pragma once
 #ifndef AI_RAWLOADER_H_INCLUDED
 #define AI_RAWLOADER_H_INCLUDED
 
@@ -50,64 +50,51 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/types.h>
 #include <vector>
 
-namespace Assimp    {
+namespace Assimp {
 
 // ---------------------------------------------------------------------------
 /** Importer class for the PovRay RAW triangle format
 */
-class RAWImporter : public BaseImporter
-{
+class RAWImporter : public BaseImporter {
 public:
     RAWImporter();
     ~RAWImporter();
 
-
-public:
-
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
 private:
-
-    struct MeshInformation
-    {
-        explicit MeshInformation(const std::string& _name)
-            : name(_name)
-        {
+    struct MeshInformation {
+        explicit MeshInformation(const std::string& _name) : name(_name) {
             vertices.reserve(100);
             colors.reserve(100);
         }
 
         std::string name;
-
         std::vector<aiVector3D> vertices;
         std::vector<aiColor4D> colors;
     };
 
-    struct GroupInformation
-    {
-        explicit GroupInformation(const std::string& _name)
-            : name(_name)
-        {
+    struct GroupInformation {
+        explicit GroupInformation(const std::string& _name) : name(_name) {
             meshes.reserve(10);
         }
 
diff --git a/code/AssetLib/SIB/SIBImporter.h b/code/AssetLib/SIB/SIBImporter.h
index 9b2a468c7..30c188a6c 100644
--- a/code/AssetLib/SIB/SIBImporter.h
+++ b/code/AssetLib/SIB/SIBImporter.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  SIBImporter.h
  *  @brief Declaration of the SIB importer class.
  */
+#pragma once
 #ifndef AI_SIBIMPORTER_H_INCLUDED
 #define AI_SIBIMPORTER_H_INCLUDED
 
@@ -50,60 +50,51 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/types.h>
 #include <vector>
 
-namespace Assimp    {
+namespace Assimp {
 
 // ---------------------------------------------------------------------------
 /** Importer class for the Nevercenter Silo SIB scene format
 */
-class ASSIMP_API SIBImporter : public BaseImporter
-{
+class ASSIMP_API SIBImporter : public BaseImporter {
 public:
     SIBImporter();
-    ~SIBImporter();
+    ~SIBImporter() override;
 
-public:
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
 private:
-    struct MeshInformation
-    {
-        explicit MeshInformation(const std::string& _name)
-            : name(_name)
-        {
+    struct MeshInformation {
+        explicit MeshInformation(const std::string& _name) : name(_name) {
             vertices.reserve(100);
             colors.reserve(100);
         }
 
         std::string name;
-
         std::vector<aiVector3D> vertices;
         std::vector<aiColor4D> colors;
     };
 
-    struct GroupInformation
-    {
-        explicit GroupInformation(const std::string& _name)
-            : name(_name)
-        {
+    struct GroupInformation {
+        explicit GroupInformation(const std::string& _name) : name(_name) {
             meshes.reserve(10);
         }
 
diff --git a/code/AssetLib/SMD/SMDLoader.h b/code/AssetLib/SMD/SMDLoader.h
index cd5daa390..b905fcc87 100644
--- a/code/AssetLib/SMD/SMDLoader.h
+++ b/code/AssetLib/SMD/SMDLoader.h
@@ -4,7 +4,6 @@ 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,
@@ -44,24 +43,21 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief Definition of the Valve SMD file format
  */
 
+#pragma once
 #ifndef AI_SMDLOADER_H_INCLUDED
 #define AI_SMDLOADER_H_INCLUDED
 
-// internal headers
 #include <assimp/BaseImporter.h>
 #include <assimp/ParsingUtils.h>
-
-// public Assimp headers
 #include <assimp/types.h>
 #include <assimp/texture.h>
 #include <assimp/anim.h>
 #include <assimp/material.h>
 
-struct aiNode;
-
-// STL headers
 #include <vector>
 
+struct aiNode;
+
 namespace Assimp {
 namespace SMD {
 
@@ -69,8 +65,7 @@ namespace SMD {
 /** Data structure for a vertex in a SMD file
 */
 struct Vertex {
-    Vertex() AI_NO_EXCEPT
-    : iParentNode(UINT_MAX) {
+    Vertex() AI_NO_EXCEPT : iParentNode(UINT_MAX) {
         // empty
     }
 
@@ -91,12 +86,11 @@ struct Vertex {
 /** Data structure for a face in a SMD file
 */
 struct Face {
-    Face() AI_NO_EXCEPT
-    : iTexture(0x0)
-    , avVertices{} {
+    Face() AI_NO_EXCEPT :
+            iTexture(0x0), avVertices{} {
         // empty
     }
-
+    
     //! Texture index for the face
     unsigned int iTexture;
 
@@ -109,17 +103,10 @@ struct Face {
 */
 struct Bone {
     //! Default constructor
-    Bone() AI_NO_EXCEPT
-    : iParent(UINT_MAX)
-    , bIsUsed(false) {
+    Bone() AI_NO_EXCEPT : iParent(UINT_MAX), bIsUsed(false) {
         // empty
     }
 
-    //! Destructor
-    ~Bone()
-    {
-    }
-
     //! Name of the bone
     std::string mName;
 
@@ -129,14 +116,12 @@ struct Bone {
     //! Animation of the bone
     struct Animation {
         //! Public default constructor
-        Animation() AI_NO_EXCEPT
-        : iFirstTimeKey() {
+        Animation() AI_NO_EXCEPT : iFirstTimeKey() {
             asKeys.reserve(20);
         }
 
         //! Data structure for a matrix key
-        struct MatrixKey
-        {
+        struct MatrixKey {
             //! Matrix at this time
             aiMatrix4x4 matrix;
 
@@ -174,46 +159,38 @@ struct Bone {
 // ---------------------------------------------------------------------------
 /** Used to load Half-life 1 and 2 SMD models
 */
-class ASSIMP_API SMDImporter : public BaseImporter
-{
+class ASSIMP_API SMDImporter : public BaseImporter {
 public:
     SMDImporter();
-    ~SMDImporter();
-
-
-public:
+    ~SMDImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details.
      */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool checkSig) const;
+        bool checkSig) const override;
 
     // -------------------------------------------------------------------
     /** Called prior to ReadFile().
      * The function is a request to the importer to update its configuration
      * basing on the Importer's configuration property list.
      */
-    void SetupProperties(const Importer* pImp);
+    void SetupProperties(const Importer* pImp) override;
 
 protected:
-
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details
     */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
-
-protected:
+        IOSystem* pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Parse the SMD file and create the output scene
@@ -405,7 +382,7 @@ private:
      */
     bool bHasUVs;
 
-    /** Current line numer
+    /** Current line number
      */
     unsigned int iLineNumber;
 
diff --git a/code/AssetLib/STL/STLExporter.h b/code/AssetLib/STL/STLExporter.h
index 080baf4fd..a6b8bf2bd 100644
--- a/code/AssetLib/STL/STLExporter.h
+++ b/code/AssetLib/STL/STLExporter.h
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file STLExporter.h
  * Declares the exporter class to write a scene to a Stereolithography (STL) file
  */
+#pragma once
 #ifndef AI_STLEXPORTER_H_INC
 #define AI_STLEXPORTER_H_INC
 
@@ -57,28 +58,24 @@ namespace Assimp {
 // ------------------------------------------------------------------------------------------------
 /** Helper class to export a given scene to a STL file. */
 // ------------------------------------------------------------------------------------------------
-class STLExporter
-{
+class STLExporter {
 public:
     /// Constructor for a specific scene to export
-    STLExporter(const char* filename, const aiScene* pScene, bool exportPOintClouds, bool binary = false);
+    STLExporter(const char *filename, const aiScene *pScene, bool exportPOintClouds, bool binary = false);
 
-    /// public stringstreams to write all output into
+    /// public string-streams to write all output into
     std::ostringstream mOutput;
 
 private:
-    void WritePointCloud(const std::string &name, const aiScene* pScene);
-    void WriteMesh(const aiMesh* m);
-    void WriteMeshBinary(const aiMesh* m);
+    void WritePointCloud(const std::string &name, const aiScene *pScene);
+    void WriteMesh(const aiMesh *m);
+    void WriteMeshBinary(const aiMesh *m);
 
 private:
-
     const std::string filename;
-
-    // this endl() doesn't flush() the stream
     const std::string endl;
 };
 
-}
+} // namespace Assimp
 
 #endif
diff --git a/code/AssetLib/STL/STLLoader.cpp b/code/AssetLib/STL/STLLoader.cpp
index 4d23b93e2..602e07106 100644
--- a/code/AssetLib/STL/STLLoader.cpp
+++ b/code/AssetLib/STL/STLLoader.cpp
@@ -43,7 +43,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef ASSIMP_BUILD_NO_STL_IMPORTER
 
-// internal headers
 #include "STLLoader.h"
 #include <assimp/ParsingUtils.h>
 #include <assimp/fast_atof.h>
@@ -146,7 +145,9 @@ bool STLImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool c
 
     if (extension == "stl") {
         return true;
-    } else if (!extension.length() || checkSig) {
+    }
+
+    if (!extension.length() || checkSig) {
         if (!pIOHandler) {
             return true;
         }
diff --git a/code/AssetLib/STL/STLLoader.h b/code/AssetLib/STL/STLLoader.h
index d8fe17004..4fac1f697 100644
--- a/code/AssetLib/STL/STLLoader.h
+++ b/code/AssetLib/STL/STLLoader.h
@@ -53,7 +53,6 @@ struct aiNode;
 
 namespace Assimp {
 
-
 // ---------------------------------------------------------------------------
 /**
  * @brief   Importer class for the sterolithography STL file format.
@@ -68,13 +67,13 @@ public:
     /**
      * @brief   The class destructor.
      */
-    ~STLImporter();
+    ~STLImporter() override;
 
     /**
      * @brief   Returns whether the class can handle the format of the given file.
      *  See BaseImporter::CanRead() for details.
      */
-    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const;
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const override;
 
 protected:
 
@@ -82,14 +81,14 @@ protected:
      * @brief   Return importer meta information.
      *  See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const 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);
+        IOSystem* pIOHandler) override;
 
     /**
      * @brief   Loads a binary .stl file
diff --git a/code/AssetLib/Terragen/TerragenLoader.cpp b/code/AssetLib/Terragen/TerragenLoader.cpp
index 9a6e7fa24..a4d8590d5 100644
--- a/code/AssetLib/Terragen/TerragenLoader.cpp
+++ b/code/AssetLib/Terragen/TerragenLoader.cpp
@@ -69,11 +69,15 @@ static const aiImporterDesc desc = {
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 TerragenImporter::TerragenImporter() :
-        configComputeUVs(false) {}
+        configComputeUVs(false) {
+    // empty
+}
 
 // ------------------------------------------------------------------------------------------------
 // Destructor, private as well
-TerragenImporter::~TerragenImporter() {}
+TerragenImporter::~TerragenImporter() {
+    // empty
+}
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
diff --git a/code/AssetLib/Terragen/TerragenLoader.h b/code/AssetLib/Terragen/TerragenLoader.h
index 6cf04059e..126cf64ad 100644
--- a/code/AssetLib/Terragen/TerragenLoader.h
+++ b/code/AssetLib/Terragen/TerragenLoader.h
@@ -42,10 +42,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  TerragenLoader.h
  *  @brief Declaration of the .ter importer class.
  */
+#pragma once
 #ifndef INCLUDED_AI_TERRAGEN_TERRAIN_LOADER_H
 #define INCLUDED_AI_TERRAGEN_TERRAIN_LOADER_H
 
 #include <assimp/BaseImporter.h>
+
 namespace Assimp {
 
 // Magic strings
@@ -71,23 +73,22 @@ namespace Assimp {
 class TerragenImporter : public BaseImporter {
 public:
     TerragenImporter();
-    ~TerragenImporter();
+    ~TerragenImporter() override;
 
-public:
     // -------------------------------------------------------------------
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
     // -------------------------------------------------------------------
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
 private:
     bool configComputeUVs;
diff --git a/code/AssetLib/Unreal/UnrealLoader.cpp b/code/AssetLib/Unreal/UnrealLoader.cpp
index e3ebc05c3..d9d3454e4 100644
--- a/code/AssetLib/Unreal/UnrealLoader.cpp
+++ b/code/AssetLib/Unreal/UnrealLoader.cpp
@@ -60,7 +60,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/IOSystem.hpp>
 #include <assimp/Importer.hpp>
 
-#include <stdint.h>
+#include <cstdint>
 #include <memory>
 
 using namespace Assimp;
diff --git a/code/AssetLib/Unreal/UnrealLoader.h b/code/AssetLib/Unreal/UnrealLoader.h
index 50464bac9..d6c121460 100644
--- a/code/AssetLib/Unreal/UnrealLoader.h
+++ b/code/AssetLib/Unreal/UnrealLoader.h
@@ -50,8 +50,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 namespace Assimp {
 
 // ---------------------------------------------------------------------------
-/** @brief Importer class to load UNREAL files (*.3d)
-*/
+/**
+ *  @brief Importer class to load UNREAL files (*.3d)
+ */
 class UnrealImporter : public BaseImporter {
 public:
     UnrealImporter();
@@ -62,23 +63,22 @@ public:
      *
      *  See BaseImporter::CanRead() for details.
      **/
-    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** @brief Called by Importer::GetExtensionList()
      *
-     * See #BaseImporter::GetInfo for the details
+     * @see #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** @brief Setup properties for the importer
      *
      * See BaseImporter::SetupProperties() for details
      */
-    void SetupProperties(const Importer *pImp);
+    void SetupProperties(const Importer *pImp) override;
 
     // -------------------------------------------------------------------
     /** @brief Imports the given file into the given scene structure.
@@ -86,7 +86,7 @@ protected:
      * See BaseImporter::InternReadFile() for details
      */
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
 private:
     //! frame to be loaded
diff --git a/code/AssetLib/X/XFileHelper.h b/code/AssetLib/X/XFileHelper.h
index 5bdaf4d35..ad17cd951 100644
--- a/code/AssetLib/X/XFileHelper.h
+++ b/code/AssetLib/X/XFileHelper.h
@@ -40,20 +40,18 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-
 /** @file Defines the helper data structures for importing XFiles */
 #ifndef AI_XFILEHELPER_H_INC
 #define AI_XFILEHELPER_H_INC
 
+#include <cstdint>
 #include <string>
 #include <vector>
-#include <stdint.h>
 
-#include <assimp/types.h>
-#include <assimp/quaternion.h>
-#include <assimp/mesh.h>
 #include <assimp/anim.h>
-#include <assimp/Defines.h>
+#include <assimp/mesh.h>
+#include <assimp/quaternion.h>
+#include <assimp/types.h>
 
 namespace Assimp {
 namespace XFile {
@@ -68,14 +66,13 @@ struct TexEntry {
     std::string mName;
     bool mIsNormalMap; // true if the texname was specified in a NormalmapFilename tag
 
-    TexEntry() AI_NO_EXCEPT
-    : mName()
-    , mIsNormalMap(false) {
+    TexEntry() AI_NO_EXCEPT :
+            mName(),
+            mIsNormalMap(false) {
         // empty
     }
-    TexEntry(const std::string& pName, bool pIsNormalMap = false)
-    : mName(pName)
-    , mIsNormalMap(pIsNormalMap) {
+    TexEntry(const std::string &pName, bool pIsNormalMap = false) :
+            mName(pName), mIsNormalMap(pIsNormalMap) {
         // empty
     }
 };
@@ -91,10 +88,10 @@ struct Material {
     std::vector<TexEntry> mTextures;
     size_t sceneIndex; ///< the index under which it was stored in the scene's material list
 
-    Material() AI_NO_EXCEPT
-    : mIsReference(false)
-    , mSpecularExponent()
-    , sceneIndex(SIZE_MAX) {
+    Material() AI_NO_EXCEPT :
+            mIsReference(false),
+            mSpecularExponent(),
+            sceneIndex(SIZE_MAX) {
         // empty
     }
 };
@@ -106,8 +103,7 @@ struct BoneWeight {
 };
 
 /** Helper structure to represent a bone in a mesh */
-struct Bone
-{
+struct Bone {
     std::string mName;
     std::vector<BoneWeight> mWeights;
     aiMatrix4x4 mOffsetMatrix;
@@ -131,18 +127,18 @@ struct Mesh {
     std::vector<Bone> mBones;
 
     explicit Mesh(const std::string &pName = std::string()) AI_NO_EXCEPT
-    : mName( pName )
-    , mPositions()
-    , mPosFaces()
-    , mNormals()
-    , mNormFaces()
-    , mNumTextures(0)
-    , mTexCoords{}
-    , mNumColorSets(0)
-    , mColors{}
-    , mFaceMaterials()
-    , mMaterials()
-    , mBones() {
+            : mName(pName),
+              mPositions(),
+              mPosFaces(),
+              mNormals(),
+              mNormFaces(),
+              mNumTextures(0),
+              mTexCoords{},
+              mNumColorSets(0),
+              mColors{},
+              mFaceMaterials(),
+              mMaterials(),
+              mBones() {
         // empty
     }
 };
@@ -151,29 +147,25 @@ struct Mesh {
 struct Node {
     std::string mName;
     aiMatrix4x4 mTrafoMatrix;
-    Node* mParent;
-    std::vector<Node*> mChildren;
-    std::vector<Mesh*> mMeshes;
+    Node *mParent;
+    std::vector<Node *> mChildren;
+    std::vector<Mesh *> mMeshes;
 
     Node() AI_NO_EXCEPT
-    : mName()
-    , mTrafoMatrix()
-    , mParent(nullptr)
-    , mChildren()
-    , mMeshes() {
+            : mName(),
+              mTrafoMatrix(),
+              mParent(nullptr),
+              mChildren(),
+              mMeshes() {
         // empty
     }
-    explicit Node( Node* pParent)
-    : mName()
-    , mTrafoMatrix()
-    , mParent(pParent)
-    , mChildren()
-    , mMeshes() {
+    explicit Node(Node *pParent) :
+            mName(), mTrafoMatrix(), mParent(pParent), mChildren(), mMeshes() {
         // empty
     }
 
     ~Node() {
-        for (unsigned int a = 0; a < mChildren.size(); ++a ) {
+        for (unsigned int a = 0; a < mChildren.size(); ++a) {
             delete mChildren[a];
         }
         for (unsigned int a = 0; a < mMeshes.size(); ++a) {
@@ -190,50 +182,47 @@ struct MatrixKey {
 /** Helper structure representing a single animated bone in a XFile */
 struct AnimBone {
     std::string mBoneName;
-    std::vector<aiVectorKey> mPosKeys;  // either three separate key sequences for position, rotation, scaling
+    std::vector<aiVectorKey> mPosKeys; // either three separate key sequences for position, rotation, scaling
     std::vector<aiQuatKey> mRotKeys;
     std::vector<aiVectorKey> mScaleKeys;
     std::vector<MatrixKey> mTrafoKeys; // or a combined key sequence of transformation matrices.
 };
 
 /** Helper structure to represent an animation set in a XFile */
-struct Animation
-{
+struct Animation {
     std::string mName;
-    std::vector<AnimBone*> mAnims;
+    std::vector<AnimBone *> mAnims;
 
-    ~Animation()
-    {
-        for( unsigned int a = 0; a < mAnims.size(); a++)
+    ~Animation() {
+        for (unsigned int a = 0; a < mAnims.size(); a++)
             delete mAnims[a];
     }
 };
 
 /** Helper structure analogue to aiScene */
-struct Scene
-{
-    Node* mRootNode;
+struct Scene {
+    Node *mRootNode;
 
-    std::vector<Mesh*> mGlobalMeshes; // global meshes found outside of any frames
+    std::vector<Mesh *> mGlobalMeshes; // global meshes found outside of any frames
     std::vector<Material> mGlobalMaterials; // global materials found outside of any meshes.
 
-    std::vector<Animation*> mAnims;
+    std::vector<Animation *> mAnims;
     unsigned int mAnimTicksPerSecond;
 
     Scene() AI_NO_EXCEPT
-    : mRootNode(nullptr)
-    , mGlobalMeshes()
-    , mGlobalMaterials()
-    , mAnimTicksPerSecond(0) {
+            : mRootNode(nullptr),
+              mGlobalMeshes(),
+              mGlobalMaterials(),
+              mAnimTicksPerSecond(0) {
         // empty
     }
     ~Scene() {
         delete mRootNode;
         mRootNode = nullptr;
-        for (unsigned int a = 0; a < mGlobalMeshes.size(); ++a ) {
+        for (unsigned int a = 0; a < mGlobalMeshes.size(); ++a) {
             delete mGlobalMeshes[a];
         }
-        for (unsigned int a = 0; a < mAnims.size(); ++a ) {
+        for (unsigned int a = 0; a < mAnims.size(); ++a) {
             delete mAnims[a];
         }
     }
diff --git a/code/AssetLib/X/XFileImporter.cpp b/code/AssetLib/X/XFileImporter.cpp
index 4c8c54551..111bd0886 100644
--- a/code/AssetLib/X/XFileImporter.cpp
+++ b/code/AssetLib/X/XFileImporter.cpp
@@ -49,7 +49,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "PostProcessing/ConvertToLHProcess.h"
 
 #include <assimp/TinyFormatter.h>
-#include <assimp/Defines.h>
 #include <assimp/IOSystem.hpp>
 #include <assimp/scene.h>
 #include <assimp/DefaultLogger.hpp>
diff --git a/code/AssetLib/X/XFileImporter.h b/code/AssetLib/X/XFileImporter.h
index 041725ce1..1dc1b140e 100644
--- a/code/AssetLib/X/XFileImporter.h
+++ b/code/AssetLib/X/XFileImporter.h
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  XFileImporter.h
  *  @brief Definition of the XFile importer class.
  */
+#pragma once
 #ifndef AI_XFILEIMPORTER_H_INC
 #define AI_XFILEIMPORTER_H_INC
 
@@ -69,28 +69,27 @@ namespace XFile {
 class XFileImporter : public BaseImporter {
 public:
     XFileImporter();
-    ~XFileImporter();
+    ~XFileImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      * See BaseImporter::CanRead() for details. */
     bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
-        bool CheckSig) const;
+        bool CheckSig) const override;
 
 protected:
-
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details
      */
-    const aiImporterDesc* GetInfo () const;
+    const aiImporterDesc* GetInfo () const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details
      */
     void InternReadFile( const std::string& pFile, aiScene* pScene,
-        IOSystem* pIOHandler);
+        IOSystem* pIOHandler) override;
 
     // -------------------------------------------------------------------
     /** Constructs the return data structure out of the imported data.
@@ -140,7 +139,7 @@ protected:
     void ConvertMaterials( aiScene* pScene, std::vector<XFile::Material>& pMaterials);
 
 protected:
-    /** Buffer to hold the loaded file */
+    /// Buffer to hold the loaded file
     std::vector<char> mBuffer;
 };
 
diff --git a/code/AssetLib/XGL/XGLLoader.cpp b/code/AssetLib/XGL/XGLLoader.cpp
index c3341af5e..a4d9835c5 100644
--- a/code/AssetLib/XGL/XGLLoader.cpp
+++ b/code/AssetLib/XGL/XGLLoader.cpp
@@ -100,7 +100,6 @@ XGLImporter::XGLImporter() :
 // Destructor, private as well
 XGLImporter::~XGLImporter() {
 	delete mXmlParser;
-    mXmlParser = nullptr;
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -115,13 +114,15 @@ bool XGLImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool c
 
 	if (extension == "xgl" || extension == "zgl") {
 		return true;
-	} else if (extension == "xml" || checkSig) {
-		ai_assert(pIOHandler != NULL);
+	}
 
+  if (extension == "xml" || checkSig) {
+		ai_assert(pIOHandler != nullptr);
 		static const char * const tokens[] = { "<world>", "<World>", "<WORLD>" };
 		return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 3);
 	}
-	return false;
+
+    return false;
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -454,12 +455,12 @@ aiMesh *XGLImporter::ToOutputMesh(const TempMaterialMesh &m) {
 	mesh->mVertices = new aiVector3D[mesh->mNumVertices];
 	std::copy(m.positions.begin(), m.positions.end(), mesh->mVertices);
 
-	if (m.normals.size()) {
+	if (!m.normals.empty()) {
 		mesh->mNormals = new aiVector3D[mesh->mNumVertices];
 		std::copy(m.normals.begin(), m.normals.end(), mesh->mNormals);
 	}
 
-	if (m.uvs.size()) {
+	if (!m.uvs.empty()) {
 		mesh->mNumUVComponents[0] = 2;
 		mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
 
@@ -595,7 +596,7 @@ bool XGLImporter::ReadMesh(XmlNode &node, TempScope &scope) {
 	}
 
 	// finally extract output meshes and add them to the scope
-	typedef std::pair<const unsigned int, TempMaterialMesh> pairt;
+	using pairt = std::pair<const unsigned int, TempMaterialMesh>;
 	for (const pairt &p : bymat) {
 		aiMesh *const m = ToOutputMesh(p.second);
 		scope.meshes_linear.push_back(m);
@@ -620,7 +621,7 @@ unsigned int XGLImporter::ResolveMaterialRef(XmlNode &node, TempScope &scope) {
 
 	const int id = ReadIndexFromText(node);
 
-	std::map<unsigned int, aiMaterial *>::iterator it = scope.materials.find(id), end = scope.materials.end();
+	auto it = scope.materials.find(id), end = scope.materials.end();
 	if (it == end) {
 		ThrowException("<matref> index out of range");
 	}
@@ -644,7 +645,7 @@ unsigned int XGLImporter::ResolveMaterialRef(XmlNode &node, TempScope &scope) {
 void XGLImporter::ReadMaterial(XmlNode &node, TempScope &scope) {
     const unsigned int mat_id = ReadIDAttr(node);
 
-	aiMaterial *mat(new aiMaterial);
+	auto *mat(new aiMaterial);
 	for (XmlNode &child : node.children()) {
         const std::string &s = ai_stdStrToLower(child.name());
 		if (s == "amb") {
diff --git a/code/AssetLib/XGL/XGLLoader.h b/code/AssetLib/XGL/XGLLoader.h
index a2b224ac9..93265f6f1 100644
--- a/code/AssetLib/XGL/XGLLoader.h
+++ b/code/AssetLib/XGL/XGLLoader.h
@@ -70,25 +70,25 @@ namespace Assimp {
 class XGLImporter : public BaseImporter, public LogFunctions<XGLImporter> {
 public:
     XGLImporter();
-    ~XGLImporter();
+    ~XGLImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
      *  See BaseImporter::CanRead() for details.    */
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
-            bool checkSig) const;
+            bool checkSig) const override;
 
 protected:
     // -------------------------------------------------------------------
     /** Return importer meta information.
      * See #BaseImporter::GetInfo for the details  */
-    const aiImporterDesc *GetInfo() const;
+    const aiImporterDesc *GetInfo() const override;
 
     // -------------------------------------------------------------------
     /** Imports the given file into the given scene structure.
      * See BaseImporter::InternReadFile() for details */
     void InternReadFile(const std::string &pFile, aiScene *pScene,
-            IOSystem *pIOHandler);
+            IOSystem *pIOHandler) override;
 
 private:
     struct TempScope {
diff --git a/code/AssetLib/glTF/glTFAsset.h b/code/AssetLib/glTF/glTFAsset.h
index 4cef646d2..5f5945271 100644
--- a/code/AssetLib/glTF/glTFAsset.h
+++ b/code/AssetLib/glTF/glTFAsset.h
@@ -51,14 +51,16 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_IMPORTER)
 
+#include "glTFCommon.h"
 #include <assimp/Exceptional.h>
-
-#include <map>
-#include <string>
-#include <list>
-#include <vector>
 #include <algorithm>
+#include <list>
+#include <map>
 #include <stdexcept>
+#include <string>
+#include <vector>
+
+// clang-format off
 
 #if (__GNUC__ == 8 && __GNUC_MINOR__ >= 0)
 #pragma GCC diagnostic push
@@ -99,208 +101,205 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #   endif
 #endif
 
+// clang-format on
+
 #include "AssetLib/glTF/glTFCommon.h"
 
-namespace glTF
-{
-    using glTFCommon::shared_ptr;
-    using glTFCommon::IOSystem;
-    using glTFCommon::IOStream;
+namespace glTF {
 
-    using rapidjson::Value;
-    using rapidjson::Document;
+using glTFCommon::IOStream;
+using glTFCommon::IOSystem;
+using glTFCommon::Nullable;
+using glTFCommon::Ref;
+using glTFCommon::shared_ptr;
 
-    class Asset;
-    class AssetWriter;
+using rapidjson::Document;
+using rapidjson::Value;
 
-    struct BufferView; // here due to cross-reference
-    struct Texture;
-    struct Light;
-    struct Skin;
+class Asset;
+class AssetWriter;
 
-    using glTFCommon::vec3;
-    using glTFCommon::vec4;
-    using glTFCommon::mat4;
+struct BufferView; // here due to cross-reference
+struct Texture;
+struct Light;
+struct Skin;
 
-    //! Magic number for GLB files
-    #define AI_GLB_MAGIC_NUMBER "glTF"
+using glTFCommon::mat4;
+using glTFCommon::vec3;
+using glTFCommon::vec4;
 
-    #ifdef ASSIMP_API
-        #include <assimp/Compiler/pushpack1.h>
-    #endif
+//! Magic number for GLB files
+#define AI_GLB_MAGIC_NUMBER "glTF"
 
-    //! For the KHR_binary_glTF extension (binary .glb file)
-    //! 20-byte header (+ the JSON + a "body" data section)
-    struct GLB_Header
-    {
-        uint8_t magic[4];     //!< Magic number: "glTF"
-        uint32_t version;     //!< Version number (always 1 as of the last update)
-        uint32_t length;      //!< Total length of the Binary glTF, including header, scene, and body, in bytes
-        uint32_t sceneLength; //!< Length, in bytes, of the glTF scene
-        uint32_t sceneFormat; //!< Specifies the format of the glTF scene (see the SceneFormat enum)
-    } PACK_STRUCT;
+// clang-format off
+#ifdef ASSIMP_API
+#   include <assimp/Compiler/pushpack1.h>
+#endif
+// clang-format on
 
-    #ifdef ASSIMP_API
-        #include <assimp/Compiler/poppack1.h>
-    #endif
+//! For the KHR_binary_glTF extension (binary .glb file)
+//! 20-byte header (+ the JSON + a "body" data section)
+struct GLB_Header {
+    uint8_t magic[4]; //!< Magic number: "glTF"
+    uint32_t version; //!< Version number (always 1 as of the last update)
+    uint32_t length; //!< Total length of the Binary glTF, including header, scene, and body, in bytes
+    uint32_t sceneLength; //!< Length, in bytes, of the glTF scene
+    uint32_t sceneFormat; //!< Specifies the format of the glTF scene (see the SceneFormat enum)
+} PACK_STRUCT;
 
+// clang-format off
+#ifdef ASSIMP_API
+#   include <assimp/Compiler/poppack1.h>
+#endif
+// clang-format on
 
-    //! Values for the GLB_Header::sceneFormat field
-    enum SceneFormat
-    {
-        SceneFormat_JSON = 0
+//! Values for the GLB_Header::sceneFormat field
+enum SceneFormat {
+    SceneFormat_JSON = 0
+};
+
+//! Values for the mesh primitive modes
+enum PrimitiveMode {
+    PrimitiveMode_POINTS = 0,
+    PrimitiveMode_LINES = 1,
+    PrimitiveMode_LINE_LOOP = 2,
+    PrimitiveMode_LINE_STRIP = 3,
+    PrimitiveMode_TRIANGLES = 4,
+    PrimitiveMode_TRIANGLE_STRIP = 5,
+    PrimitiveMode_TRIANGLE_FAN = 6
+};
+
+//! Values for the Accessor::componentType field
+enum ComponentType {
+    ComponentType_BYTE = 5120,
+    ComponentType_UNSIGNED_BYTE = 5121,
+    ComponentType_SHORT = 5122,
+    ComponentType_UNSIGNED_SHORT = 5123,
+    ComponentType_UNSIGNED_INT = 5125,
+    ComponentType_FLOAT = 5126
+};
+
+inline unsigned int ComponentTypeSize(ComponentType t) {
+    switch (t) {
+    case ComponentType_SHORT:
+    case ComponentType_UNSIGNED_SHORT:
+        return 2;
+
+    case ComponentType_UNSIGNED_INT:
+    case ComponentType_FLOAT:
+        return 4;
+
+    case ComponentType_BYTE:
+    case ComponentType_UNSIGNED_BYTE:
+        return 1;
+    default:
+        std::string err = "GLTF: Unsupported Component Type ";
+        err += std::to_string(t);
+        throw DeadlyImportError(err);
+    }
+}
+
+//! Values for the BufferView::target field
+enum BufferViewTarget {
+    BufferViewTarget_NONE = 0,
+    BufferViewTarget_ARRAY_BUFFER = 34962,
+    BufferViewTarget_ELEMENT_ARRAY_BUFFER = 34963
+};
+
+//! Values for the Sampler::magFilter field
+enum SamplerMagFilter {
+    SamplerMagFilter_Nearest = 9728,
+    SamplerMagFilter_Linear = 9729
+};
+
+//! Values for the Sampler::minFilter field
+enum SamplerMinFilter {
+    SamplerMinFilter_Nearest = 9728,
+    SamplerMinFilter_Linear = 9729,
+    SamplerMinFilter_Nearest_Mipmap_Nearest = 9984,
+    SamplerMinFilter_Linear_Mipmap_Nearest = 9985,
+    SamplerMinFilter_Nearest_Mipmap_Linear = 9986,
+    SamplerMinFilter_Linear_Mipmap_Linear = 9987
+};
+
+//! Values for the Sampler::wrapS and Sampler::wrapT field
+enum SamplerWrap {
+    SamplerWrap_Clamp_To_Edge = 33071,
+    SamplerWrap_Mirrored_Repeat = 33648,
+    SamplerWrap_Repeat = 10497
+};
+
+//! Values for the Texture::format and Texture::internalFormat fields
+enum TextureFormat {
+    TextureFormat_ALPHA = 6406,
+    TextureFormat_RGB = 6407,
+    TextureFormat_RGBA = 6408,
+    TextureFormat_LUMINANCE = 6409,
+    TextureFormat_LUMINANCE_ALPHA = 6410
+};
+
+//! Values for the Texture::target field
+enum TextureTarget {
+    TextureTarget_TEXTURE_2D = 3553
+};
+
+//! Values for the Texture::type field
+enum TextureType {
+    TextureType_UNSIGNED_BYTE = 5121,
+    TextureType_UNSIGNED_SHORT_5_6_5 = 33635,
+    TextureType_UNSIGNED_SHORT_4_4_4_4 = 32819,
+    TextureType_UNSIGNED_SHORT_5_5_5_1 = 32820
+};
+
+//! Values for the Accessor::type field (helper class)
+class AttribType {
+public:
+    enum Value { SCALAR,
+        VEC2,
+        VEC3,
+        VEC4,
+        MAT2,
+        MAT3,
+        MAT4 };
+
+private:
+    static const size_t NUM_VALUES = static_cast<size_t>(MAT4) + 1;
+
+    struct Info {
+        const char *name;
+        unsigned int numComponents;
     };
 
-    //! Values for the mesh primitive modes
-    enum PrimitiveMode
-    {
-        PrimitiveMode_POINTS = 0,
-        PrimitiveMode_LINES = 1,
-        PrimitiveMode_LINE_LOOP = 2,
-        PrimitiveMode_LINE_STRIP = 3,
-        PrimitiveMode_TRIANGLES = 4,
-        PrimitiveMode_TRIANGLE_STRIP = 5,
-        PrimitiveMode_TRIANGLE_FAN = 6
-    };
+    template <int N>
+    struct data { static const Info infos[NUM_VALUES]; };
 
-    //! Values for the Accessor::componentType field
-    enum ComponentType
-    {
-        ComponentType_BYTE = 5120,
-        ComponentType_UNSIGNED_BYTE = 5121,
-        ComponentType_SHORT = 5122,
-        ComponentType_UNSIGNED_SHORT = 5123,
-        ComponentType_UNSIGNED_INT = 5125,
-        ComponentType_FLOAT = 5126
-    };
-
-    inline unsigned int ComponentTypeSize(ComponentType t)
-    {
-        switch (t) {
-            case ComponentType_SHORT:
-            case ComponentType_UNSIGNED_SHORT:
-                return 2;
-
-            case ComponentType_UNSIGNED_INT:
-            case ComponentType_FLOAT:
-                return 4;
-
-            case ComponentType_BYTE:
-            case ComponentType_UNSIGNED_BYTE:
-                return 1;
-            default:
-                std::string err = "GLTF: Unsupported Component Type ";
-                err += std::to_string( t );
-                throw DeadlyImportError(err);
+public:
+    inline static Value FromString(const char *str) {
+        for (size_t i = 0; i < NUM_VALUES; ++i) {
+            if (strcmp(data<0>::infos[i].name, str) == 0) {
+                return static_cast<Value>(i);
+            }
         }
+        return SCALAR;
     }
 
-    //! Values for the BufferView::target field
-    enum BufferViewTarget
-    {
-        BufferViewTarget_NONE = 0,
-        BufferViewTarget_ARRAY_BUFFER = 34962,
-        BufferViewTarget_ELEMENT_ARRAY_BUFFER = 34963
-    };
-
-    //! Values for the Sampler::magFilter field
-    enum SamplerMagFilter
-    {
-        SamplerMagFilter_Nearest = 9728,
-        SamplerMagFilter_Linear = 9729
-    };
-
-    //! Values for the Sampler::minFilter field
-    enum SamplerMinFilter
-    {
-        SamplerMinFilter_Nearest = 9728,
-        SamplerMinFilter_Linear = 9729,
-        SamplerMinFilter_Nearest_Mipmap_Nearest = 9984,
-        SamplerMinFilter_Linear_Mipmap_Nearest = 9985,
-        SamplerMinFilter_Nearest_Mipmap_Linear = 9986,
-        SamplerMinFilter_Linear_Mipmap_Linear = 9987
-    };
-
-    //! Values for the Sampler::wrapS and Sampler::wrapT field
-    enum SamplerWrap
-    {
-        SamplerWrap_Clamp_To_Edge = 33071,
-        SamplerWrap_Mirrored_Repeat = 33648,
-        SamplerWrap_Repeat = 10497
-    };
-
-    //! Values for the Texture::format and Texture::internalFormat fields
-    enum TextureFormat
-    {
-        TextureFormat_ALPHA = 6406,
-        TextureFormat_RGB = 6407,
-        TextureFormat_RGBA = 6408,
-        TextureFormat_LUMINANCE = 6409,
-        TextureFormat_LUMINANCE_ALPHA = 6410
-    };
-
-    //! Values for the Texture::target field
-    enum TextureTarget
-    {
-        TextureTarget_TEXTURE_2D = 3553
-    };
-
-    //! Values for the Texture::type field
-    enum TextureType
-    {
-        TextureType_UNSIGNED_BYTE = 5121,
-        TextureType_UNSIGNED_SHORT_5_6_5 = 33635,
-        TextureType_UNSIGNED_SHORT_4_4_4_4 = 32819,
-        TextureType_UNSIGNED_SHORT_5_5_5_1 = 32820
-    };
-
-
-    //! Values for the Accessor::type field (helper class)
-    class AttribType
-    {
-    public:
-        enum Value
-            { SCALAR, VEC2, VEC3, VEC4, MAT2, MAT3, MAT4 };
-
-    private:
-        static const size_t NUM_VALUES = static_cast<size_t>(MAT4)+1;
-
-        struct Info
-            { const char* name; unsigned int numComponents; };
-
-        template<int N> struct data
-            { static const Info infos[NUM_VALUES]; };
-
-    public:
-        inline static Value FromString(const char* str)
-        {
-            for (size_t i = 0; i < NUM_VALUES; ++i) {
-                if (strcmp(data<0>::infos[i].name, str) == 0) {
-                    return static_cast<Value>(i);
-                }
-            }
-            return SCALAR;
-        }
-
-        inline static const char* ToString(Value type)
-        {
-            return data<0>::infos[static_cast<size_t>(type)].name;
-        }
-
-        inline static unsigned int GetNumComponents(Value type)
-        {
-            return data<0>::infos[static_cast<size_t>(type)].numComponents;
-        }
-    };
-
-    // must match the order of the AttribTypeTraits::Value enum!
-    template<int N> const AttribType::Info
-    AttribType::data<N>::infos[AttribType::NUM_VALUES] = {
-        { "SCALAR", 1 }, { "VEC2", 2 }, { "VEC3", 3 }, { "VEC4", 4 }, { "MAT2", 4 }, { "MAT3", 9 }, { "MAT4", 16 }
-    };
+    inline static const char *ToString(Value type) {
+        return data<0>::infos[static_cast<size_t>(type)].name;
+    }
 
+    inline static unsigned int GetNumComponents(Value type) {
+        return data<0>::infos[static_cast<size_t>(type)].numComponents;
+    }
+};
 
+// must match the order of the AttribTypeTraits::Value enum!
+template <int N>
+const AttribType::Info
+        AttribType::data<N>::infos[AttribType::NUM_VALUES] = {
+            { "SCALAR", 1 }, { "VEC2", 2 }, { "VEC3", 3 }, { "VEC4", 4 }, { "MAT2", 4 }, { "MAT3", 9 }, { "MAT4", 16 }
+        };
 
+/*
     //! A reference to one top-level object, which is valid
     //! until the Asset instance is destroyed
     template<class T>
@@ -324,834 +323,742 @@ namespace glTF
 
         T& operator*()
             { return *((*vector)[index]); }
-    };
+    };*/
 
-    //! Helper struct to represent values that might not be present
-    template<class T>
-    struct Nullable
-    {
-        T value;
-        bool isPresent;
+//! Base class for all glTF top-level objects
+struct Object {
+    std::string id; //!< The globally unique ID used to reference this object
+    std::string name; //!< The user-defined name of this object
 
-        Nullable() : isPresent(false) {}
-        Nullable(T& val) : value(val), isPresent(true) {}
-    };
+    //! Objects marked as special are not exported (used to emulate the binary body buffer)
+    virtual bool IsSpecial() const { return false; }
 
+    virtual ~Object() {}
 
-    //! Base class for all glTF top-level objects
-    struct Object
-    {
-        std::string id;   //!< The globally unique ID used to reference this object
-        std::string name; //!< The user-defined name of this object
+    //! Maps special IDs to another ID, where needed. Subclasses may override it (statically)
+    static const char *TranslateId(Asset & /*r*/, const char *id) { return id; }
+};
 
-        //! Objects marked as special are not exported (used to emulate the binary body buffer)
-        virtual bool IsSpecial() const
-            { return false; }
+//
+// Classes for each glTF top-level object type
+//
 
-        virtual ~Object() {}
+//! A typed view into a BufferView. A BufferView contains raw binary data.
+//! An accessor provides a typed view into a BufferView or a subset of a BufferView
+//! similar to how WebGL's vertexAttribPointer() defines an attribute in a buffer.
+struct Accessor : public Object {
+    Ref<BufferView> bufferView; //!< The ID of the bufferView. (required)
+    unsigned int byteOffset; //!< The offset relative to the start of the bufferView in bytes. (required)
+    unsigned int byteStride; //!< The stride, in bytes, between attributes referenced by this accessor. (default: 0)
+    ComponentType componentType; //!< The datatype of components in the attribute. (required)
+    unsigned int count; //!< The number of attributes referenced by this accessor. (required)
+    AttribType::Value type; //!< Specifies if the attribute is a scalar, vector, or matrix. (required)
+    std::vector<double> max; //!< Maximum value of each component in this attribute.
+    std::vector<double> min; //!< Minimum value of each component in this attribute.
 
-        //! Maps special IDs to another ID, where needed. Subclasses may override it (statically)
-        static const char* TranslateId(Asset& /*r*/, const char* id)
-            { return id; }
-    };
+    unsigned int GetNumComponents();
+    unsigned int GetBytesPerComponent();
+    unsigned int GetElementSize();
 
-    //
-    // Classes for each glTF top-level object type
-    //
+    inline uint8_t *GetPointer();
 
-    //! A typed view into a BufferView. A BufferView contains raw binary data.
-    //! An accessor provides a typed view into a BufferView or a subset of a BufferView
-    //! similar to how WebGL's vertexAttribPointer() defines an attribute in a buffer.
-    struct Accessor : public Object
-    {
-        Ref<BufferView> bufferView;  //!< The ID of the bufferView. (required)
-        unsigned int byteOffset;     //!< The offset relative to the start of the bufferView in bytes. (required)
-        unsigned int byteStride;     //!< The stride, in bytes, between attributes referenced by this accessor. (default: 0)
-        ComponentType componentType; //!< The datatype of components in the attribute. (required)
-        unsigned int count;          //!< The number of attributes referenced by this accessor. (required)
-        AttribType::Value type;      //!< Specifies if the attribute is a scalar, vector, or matrix. (required)
-        std::vector<double> max;     //!< Maximum value of each component in this attribute.
-        std::vector<double> min;     //!< Minimum value of each component in this attribute.
+    template <class T>
+    bool ExtractData(T *&outData);
 
-        unsigned int GetNumComponents();
-        unsigned int GetBytesPerComponent();
-        unsigned int GetElementSize();
+    void WriteData(size_t count, const void *src_buffer, size_t src_stride);
 
-        inline uint8_t* GetPointer();
-
-        template<class T>
-        bool ExtractData(T*& outData);
-
-        void WriteData(size_t count, const void* src_buffer, size_t src_stride);
-
-        //! Helper class to iterate the data
-        class Indexer
-        {
-            friend struct Accessor;
+    //! Helper class to iterate the data
+    class Indexer {
+        friend struct Accessor;
 
         // This field is reported as not used, making it protectd is the easiest way to work around it without going to the bottom of what the problem is:
         // ../code/glTF2/glTF2Asset.h:392:19: error: private field 'accessor' is not used [-Werror,-Wunused-private-field]
-        protected:
-            Accessor &accessor;
-
-        private:
-            uint8_t* data;
-            size_t elemSize, stride;
-
-            Indexer(Accessor& acc);
-
-        public:
-
-            //! Accesses the i-th value as defined by the accessor
-            template<class T>
-            T GetValue(int i);
-
-            //! Accesses the i-th value as defined by the accessor
-            inline unsigned int GetUInt(int i)
-            {
-                return GetValue<unsigned int>(i);
-            }
-
-            inline bool IsValid() const
-            {
-                return data != 0;
-            }
-        };
-
-        inline Indexer GetIndexer()
-        {
-            return Indexer(*this);
-        }
-
-        Accessor() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    //! A buffer points to binary geometry, animation, or skins.
-    struct Buffer : public Object
-	{
-		/********************* Types *********************/
-	public:
-
-		enum Type
-		{
-			Type_arraybuffer,
-			Type_text
-		};
-
-		/// \struct SEncodedRegion
-		/// Descriptor of encoded region in "bufferView".
-		struct SEncodedRegion
-		{
-			const size_t Offset;///< Offset from begin of "bufferView" to encoded region, in bytes.
-			const size_t EncodedData_Length;///< Size of encoded region, in bytes.
-			uint8_t* const DecodedData;///< Cached encoded data.
-			const size_t DecodedData_Length;///< Size of decoded region, in bytes.
-			const std::string ID;///< ID of the region.
-
-			/// \fn SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string pID)
-			/// Constructor.
-			/// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
-			/// \param [in] pEncodedData_Length - size of encoded region, in bytes.
-			/// \param [in] pDecodedData - pointer to decoded data array.
-			/// \param [in] pDecodedData_Length - size of encoded region, in bytes.
-			/// \param [in] pID - ID of the region.
-            SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID) :
-                    Offset(pOffset), EncodedData_Length(pEncodedData_Length), DecodedData(pDecodedData), DecodedData_Length(pDecodedData_Length), ID(pID) {}
-
-            /// \fn ~SEncodedRegion()
-			/// Destructor.
-			~SEncodedRegion() { delete [] DecodedData; }
-		};
-
-		/******************* Variables *******************/
-
-		//std::string uri; //!< The uri of the buffer. Can be a filepath, a data uri, etc. (required)
-		size_t byteLength; //!< The length of the buffer in bytes. (default: 0)
-		//std::string type; //!< XMLHttpRequest responseType (default: "arraybuffer")
-
-		Type type;
-
-		/// \var EncodedRegion_Current
-		/// Pointer to currently active encoded region.
-		/// Why not decoding all regions at once and not to set one buffer with decoded data?
-		/// Yes, why not? Even "accessor" point to decoded data. I mean that fields "byteOffset", "byteStride" and "count" has values which describes decoded
-		/// data array. But only in range of mesh while is active parameters from "compressedData". For another mesh accessors point to decoded data too. But
-		/// offset is counted for another regions is encoded.
-		/// Example. You have two meshes. For every of it you have 4 bytes of data. That data compressed to 2 bytes. So, you have buffer with encoded data:
-		/// M1_E0, M1_E1, M2_E0, M2_E1.
-		/// After decoding you'll get:
-		/// M1_D0, M1_D1, M1_D2, M1_D3, M2_D0, M2_D1, M2_D2, M2_D3.
-		/// "accessors" must to use values that point to decoded data - obviously. So, you'll expect "accessors" like
-		/// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 4, byteLength: 4}
-		/// but in real life you'll get:
-		/// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 2, byteLength: 4}
-		/// Yes, accessor of next mesh has offset and length which mean: current mesh data is decoded, all other data is encoded.
-		/// And when before you start to read data of current mesh (with encoded data ofcourse) you must decode region of "bufferView", after read finished
-		/// delete encoding mark. And after that you can repeat process: decode data of mesh, read, delete decoded data.
-		///
-		/// Remark. Encoding all data at once is good in world with computers which do not has RAM limitation. So, you must use step by step encoding in
-		/// exporter and importer. And, thanks to such way, there is no need to load whole file into memory.
-		SEncodedRegion* EncodedRegion_Current;
-
-	private:
-
-		shared_ptr<uint8_t> mData; //!< Pointer to the data
-		bool mIsSpecial; //!< Set to true for special cases (e.g. the body buffer)
-        size_t capacity = 0; //!< The capacity of the buffer in bytes. (default: 0)
-		/// \var EncodedRegion_List
-		/// List of encoded regions.
-		std::list<SEncodedRegion*> EncodedRegion_List;
-
-		/******************* Functions *******************/
-
-	public:
-
-		Buffer();
-		~Buffer();
-
-		void Read(Value& obj, Asset& r);
-
-        bool LoadFromStream(IOStream& stream, size_t length = 0, size_t baseOffset = 0);
-
-		/// \fn void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string& pID)
-		/// Mark region of "bufferView" as encoded. When data is request from such region then "bufferView" use decoded data.
-		/// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
-		/// \param [in] pEncodedData_Length - size of encoded region, in bytes.
-		/// \param [in] pDecodedData - pointer to decoded data array.
-		/// \param [in] pDecodedData_Length - size of encoded region, in bytes.
-		/// \param [in] pID - ID of the region.
-		void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string& pID);
-
-		/// \fn void EncodedRegion_SetCurrent(const std::string& pID)
-		/// Select current encoded region by ID. \sa EncodedRegion_Current.
-		/// \param [in] pID - ID of the region.
-		void EncodedRegion_SetCurrent(const std::string& pID);
-
-		/// \fn bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count)
-		/// Replace part of buffer data. Pay attention that function work with original array of data (\ref mData) not with encoded regions.
-		/// \param [in] pBufferData_Offset - index of first element in buffer from which new data will be placed.
-		/// \param [in] pBufferData_Count - count of bytes in buffer which will be replaced.
-		/// \param [in] pReplace_Data - pointer to array with new data for buffer.
-		/// \param [in] pReplace_Count - count of bytes in new data.
-		/// \return true - if successfully replaced, false if input arguments is out of range.
-		bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count);
-
-        size_t AppendData(uint8_t* data, size_t length);
-        void Grow(size_t amount);
-
-        uint8_t* GetPointer()
-            { return mData.get(); }
-
-        void MarkAsSpecial()
-            { mIsSpecial = true; }
-
-        bool IsSpecial() const
-            { return mIsSpecial; }
-
-        std::string GetURI()
-            { return std::string(this->id) + ".bin"; }
-
-        static const char* TranslateId(Asset& r, const char* id);
-    };
-
-    //! A view into a buffer generally representing a subset of the buffer.
-    struct BufferView : public Object
-    {
-        Ref<Buffer> buffer; //! The ID of the buffer. (required)
-        size_t byteOffset; //! The offset into the buffer in bytes. (required)
-        size_t byteLength; //! The length of the bufferView in bytes. (default: 0)
-
-        BufferViewTarget target; //! The target that the WebGL buffer should be bound to.
-
-        void Read(Value& obj, Asset& r);
-    };
-
-    struct Camera : public Object
-    {
-        enum Type
-        {
-            Perspective,
-            Orthographic
-        };
-
-        Type type;
-
-        union
-        {
-            struct {
-                float aspectRatio; //!<The floating - point aspect ratio of the field of view. (0 = undefined = use the canvas one)
-                float yfov;  //!<The floating - point vertical field of view in radians. (required)
-                float zfar;  //!<The floating - point distance to the far clipping plane. (required)
-                float znear; //!< The floating - point distance to the near clipping plane. (required)
-            } perspective;
-
-            struct {
-                float xmag;  //! The floating-point horizontal magnification of the view. (required)
-                float ymag;  //! The floating-point vertical magnification of the view. (required)
-                float zfar;  //! The floating-point distance to the far clipping plane. (required)
-                float znear; //! The floating-point distance to the near clipping plane. (required)
-            } ortographic;
-        };
-
-        Camera() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-
-    //! Image data used to create a texture.
-    struct Image : public Object
-    {
-        std::string uri; //! The uri of the image, that can be a file path, a data URI, etc.. (required)
-
-        Ref<BufferView> bufferView;
-
-        std::string mimeType;
-
-        int width, height;
+    protected:
+        Accessor &accessor;
 
     private:
-        std::unique_ptr<uint8_t[]> mData;
-        size_t mDataLength;
+        uint8_t *data;
+        size_t elemSize, stride;
+
+        Indexer(Accessor &acc);
 
     public:
+        //! Accesses the i-th value as defined by the accessor
+        template <class T>
+        T GetValue(int i);
 
-        Image();
-        void Read(Value& obj, Asset& r);
+        //! Accesses the i-th value as defined by the accessor
+        inline unsigned int GetUInt(int i) {
+            return GetValue<unsigned int>(i);
+        }
 
-        inline bool HasData() const
-            { return mDataLength > 0; }
-
-        inline size_t GetDataLength() const
-            { return mDataLength; }
-
-        inline const uint8_t* GetData() const
-            { return mData.get(); }
-
-        inline uint8_t* StealData();
-
-        inline void SetData(uint8_t* data, size_t length, Asset& r);
+        inline bool IsValid() const {
+            return data != 0;
+        }
     };
 
-    //! Holds a material property that can be a texture or a color
-    struct TexProperty
-    {
-        Ref<Texture> texture;
-        vec4 color;
+    inline Indexer GetIndexer() {
+        return Indexer(*this);
+    }
+
+    Accessor() {}
+    void Read(Value &obj, Asset &r);
+};
+
+//! A buffer points to binary geometry, animation, or skins.
+struct Buffer : public Object {
+    /********************* Types *********************/
+public:
+    enum Type {
+        Type_arraybuffer,
+        Type_text
     };
 
-    //! The material appearance of a primitive.
-    struct Material : public Object
-    {
-        //Ref<Sampler> source; //!< The ID of the technique.
-        //std::gltf_unordered_map<std::string, std::string> values; //!< A dictionary object of parameter values.
+    /// \struct SEncodedRegion
+    /// Descriptor of encoded region in "bufferView".
+    struct SEncodedRegion {
+        const size_t Offset; ///< Offset from begin of "bufferView" to encoded region, in bytes.
+        const size_t EncodedData_Length; ///< Size of encoded region, in bytes.
+        uint8_t *const DecodedData; ///< Cached encoded data.
+        const size_t DecodedData_Length; ///< Size of decoded region, in bytes.
+        const std::string ID; ///< ID of the region.
 
-        //! Techniques defined by KHR_materials_common
-        enum Technique
-        {
-            Technique_undefined = 0,
-            Technique_BLINN,
-            Technique_PHONG,
-            Technique_LAMBERT,
-            Technique_CONSTANT
-        };
+        /// \fn SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string pID)
+        /// Constructor.
+        /// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
+        /// \param [in] pEncodedData_Length - size of encoded region, in bytes.
+        /// \param [in] pDecodedData - pointer to decoded data array.
+        /// \param [in] pDecodedData_Length - size of encoded region, in bytes.
+        /// \param [in] pID - ID of the region.
+        SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID) :
+                Offset(pOffset), EncodedData_Length(pEncodedData_Length), DecodedData(pDecodedData), DecodedData_Length(pDecodedData_Length), ID(pID) {}
 
-        TexProperty ambient;
-        TexProperty diffuse;
-        TexProperty specular;
-        TexProperty emission;
-
-        bool doubleSided;
-        bool transparent;
-        float transparency;
-        float shininess;
-
-        Technique technique;
-
-        Material() { SetDefaults(); }
-        void Read(Value& obj, Asset& r);
-        void SetDefaults();
+        /// \fn ~SEncodedRegion()
+        /// Destructor.
+        ~SEncodedRegion() { delete[] DecodedData; }
     };
 
-    //! A set of primitives to be rendered. A node can contain one or more meshes. A node's transform places the mesh in the scene.
-    struct Mesh : public Object
-    {
-        typedef std::vector< Ref<Accessor> > AccessorList;
+    /******************* Variables *******************/
 
-        struct Primitive
-        {
-            PrimitiveMode mode;
+    //std::string uri; //!< The uri of the buffer. Can be a filepath, a data uri, etc. (required)
+    size_t byteLength; //!< The length of the buffer in bytes. (default: 0)
+    //std::string type; //!< XMLHttpRequest responseType (default: "arraybuffer")
 
-            struct Attributes {
-                AccessorList position, normal, texcoord, color, joint, jointmatrix, weight;
-            } attributes;
+    Type type;
 
-            Ref<Accessor> indices;
+    /// \var EncodedRegion_Current
+    /// Pointer to currently active encoded region.
+    /// Why not decoding all regions at once and not to set one buffer with decoded data?
+    /// Yes, why not? Even "accessor" point to decoded data. I mean that fields "byteOffset", "byteStride" and "count" has values which describes decoded
+    /// data array. But only in range of mesh while is active parameters from "compressedData". For another mesh accessors point to decoded data too. But
+    /// offset is counted for another regions is encoded.
+    /// Example. You have two meshes. For every of it you have 4 bytes of data. That data compressed to 2 bytes. So, you have buffer with encoded data:
+    /// M1_E0, M1_E1, M2_E0, M2_E1.
+    /// After decoding you'll get:
+    /// M1_D0, M1_D1, M1_D2, M1_D3, M2_D0, M2_D1, M2_D2, M2_D3.
+    /// "accessors" must to use values that point to decoded data - obviously. So, you'll expect "accessors" like
+    /// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 4, byteLength: 4}
+    /// but in real life you'll get:
+    /// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 2, byteLength: 4}
+    /// Yes, accessor of next mesh has offset and length which mean: current mesh data is decoded, all other data is encoded.
+    /// And when before you start to read data of current mesh (with encoded data ofcourse) you must decode region of "bufferView", after read finished
+    /// delete encoding mark. And after that you can repeat process: decode data of mesh, read, delete decoded data.
+    ///
+    /// Remark. Encoding all data at once is good in world with computers which do not has RAM limitation. So, you must use step by step encoding in
+    /// exporter and importer. And, thanks to such way, there is no need to load whole file into memory.
+    SEncodedRegion *EncodedRegion_Current;
 
-            Ref<Material> material;
-        };
+private:
+    shared_ptr<uint8_t> mData; //!< Pointer to the data
+    bool mIsSpecial; //!< Set to true for special cases (e.g. the body buffer)
+    size_t capacity = 0; //!< The capacity of the buffer in bytes. (default: 0)
+    /// \var EncodedRegion_List
+    /// List of encoded regions.
+    std::list<SEncodedRegion *> EncodedRegion_List;
 
-		/// \struct SExtension
-		/// Extension used for mesh.
-		struct SExtension
-		{
-			/// \enum EType
-			/// Type of extension.
-			enum EType
-			{
-				#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
-					Compression_Open3DGC,///< Compression of mesh data using Open3DGC algorithm.
-				#endif
+    /******************* Functions *******************/
 
-				Unknown
-			};
+public:
+    Buffer();
+    ~Buffer();
 
-			EType Type;///< Type of extension.
+    void Read(Value &obj, Asset &r);
 
-			/// \fn SExtension
-			/// Constructor.
-			/// \param [in] pType - type of extension.
-			SExtension(const EType pType)
-				: Type(pType)
-			{}
+    bool LoadFromStream(IOStream &stream, size_t length = 0, size_t baseOffset = 0);
 
-            virtual ~SExtension() {
-                // empty
-            }
-		};
+    /// \fn void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string& pID)
+    /// Mark region of "bufferView" as encoded. When data is request from such region then "bufferView" use decoded data.
+    /// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
+    /// \param [in] pEncodedData_Length - size of encoded region, in bytes.
+    /// \param [in] pDecodedData - pointer to decoded data array.
+    /// \param [in] pDecodedData_Length - size of encoded region, in bytes.
+    /// \param [in] pID - ID of the region.
+    void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID);
 
-		#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
-			/// \struct SCompression_Open3DGC
-			/// Compression of mesh data using Open3DGC algorithm.
-			struct SCompression_Open3DGC : public SExtension
-			{
-				using SExtension::Type;
+    /// \fn void EncodedRegion_SetCurrent(const std::string& pID)
+    /// Select current encoded region by ID. \sa EncodedRegion_Current.
+    /// \param [in] pID - ID of the region.
+    void EncodedRegion_SetCurrent(const std::string &pID);
 
-				std::string Buffer;///< ID of "buffer" used for storing compressed data.
-				size_t Offset;///< Offset in "bufferView" where compressed data are stored.
-				size_t Count;///< Count of elements in compressed data. Is always equivalent to size in bytes: look comments for "Type" and "Component_Type".
-				bool Binary;///< If true then "binary" mode is used for coding, if false - "ascii" mode.
-				size_t IndicesCount;///< Count of indices in mesh.
-				size_t VerticesCount;///< Count of vertices in mesh.
-				// AttribType::Value Type;///< Is always "SCALAR".
-				// ComponentType Component_Type;///< Is always "ComponentType_UNSIGNED_BYTE" (5121).
+    /// \fn bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count)
+    /// Replace part of buffer data. Pay attention that function work with original array of data (\ref mData) not with encoded regions.
+    /// \param [in] pBufferData_Offset - index of first element in buffer from which new data will be placed.
+    /// \param [in] pBufferData_Count - count of bytes in buffer which will be replaced.
+    /// \param [in] pReplace_Data - pointer to array with new data for buffer.
+    /// \param [in] pReplace_Count - count of bytes in new data.
+    /// \return true - if successfully replaced, false if input arguments is out of range.
+    bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t *pReplace_Data, const size_t pReplace_Count);
 
-				/// \fn SCompression_Open3DGC
-				/// Constructor.
-				SCompression_Open3DGC()
-				: SExtension(Compression_Open3DGC) {
-                    // empty
-                }
+    size_t AppendData(uint8_t *data, size_t length);
+    void Grow(size_t amount);
 
-                virtual ~SCompression_Open3DGC() {
-                    // empty
-                }
-			};
-		#endif
+    uint8_t *GetPointer() { return mData.get(); }
 
-        std::vector<Primitive> primitives;
-		std::list<SExtension*> Extension;///< List of extensions used in mesh.
+    void MarkAsSpecial() { mIsSpecial = true; }
 
-        Mesh() {}
+    bool IsSpecial() const { return mIsSpecial; }
 
-		/// \fn ~Mesh()
-		/// Destructor.
-		~Mesh() { for(std::list<SExtension*>::iterator it = Extension.begin(), it_end = Extension.end(); it != it_end; it++) { delete *it; }; }
+    std::string GetURI() { return std::string(this->id) + ".bin"; }
 
-		/// \fn void Read(Value& pJSON_Object, Asset& pAsset_Root)
-		/// Get mesh data from JSON-object and place them to root asset.
-		/// \param [in] pJSON_Object - reference to pJSON-object from which data are read.
-		/// \param [out] pAsset_Root - reference to root asset where data will be stored.
-		void Read(Value& pJSON_Object, Asset& pAsset_Root);
+    static const char *TranslateId(Asset &r, const char *id);
+};
 
-		#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
-			/// \fn void Decode_O3DGC(const SCompression_Open3DGC& pCompression_Open3DGC, Asset& pAsset_Root)
-			/// Decode part of "buffer" which encoded with Open3DGC algorithm.
-			/// \param [in] pCompression_Open3DGC - reference to structure which describe encoded region.
-			/// \param [out] pAsset_Root - reference to root assed where data will be stored.
-			void Decode_O3DGC(const SCompression_Open3DGC& pCompression_Open3DGC, Asset& pAsset_Root);
-		#endif
+//! A view into a buffer generally representing a subset of the buffer.
+struct BufferView : public Object {
+    Ref<Buffer> buffer; //! The ID of the buffer. (required)
+    size_t byteOffset; //! The offset into the buffer in bytes. (required)
+    size_t byteLength; //! The length of the bufferView in bytes. (default: 0)
+
+    BufferViewTarget target; //! The target that the WebGL buffer should be bound to.
+
+    void Read(Value &obj, Asset &r);
+};
+
+struct Camera : public Object {
+    enum Type {
+        Perspective,
+        Orthographic
     };
 
-    struct Node : public Object
-    {
-        std::vector< Ref<Node> > children;
-        std::vector< Ref<Mesh> > meshes;
+    Type type;
 
-        Nullable<mat4> matrix;
-        Nullable<vec3> translation;
-        Nullable<vec4> rotation;
-        Nullable<vec3> scale;
-
-        Ref<Camera> camera;
-        Ref<Light>  light;
-
-        std::vector< Ref<Node> > skeletons;       //!< The ID of skeleton nodes. Each of which is the root of a node hierarchy.
-        Ref<Skin>  skin;                          //!< The ID of the skin referenced by this node.
-        std::string jointName;                    //!< Name used when this node is a joint in a skin.
-
-        Ref<Node> parent;                         //!< This is not part of the glTF specification. Used as a helper.
-
-        Node() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    struct Program : public Object
-    {
-        Program() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-
-    struct Sampler : public Object
-    {
-        SamplerMagFilter magFilter; //!< The texture magnification filter. (required)
-        SamplerMinFilter minFilter; //!< The texture minification filter. (required)
-        SamplerWrap wrapS;          //!< The texture wrapping in the S direction. (required)
-        SamplerWrap wrapT;          //!< The texture wrapping in the T direction. (required)
-
-        Sampler() {}
-        void Read(Value& obj, Asset& r);
-        void SetDefaults();
-    };
-
-    struct Scene : public Object
-    {
-        std::vector< Ref<Node> > nodes;
-
-        Scene() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    struct Shader : public Object
-    {
-        Shader() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    struct Skin : public Object
-    {
-        Nullable<mat4> bindShapeMatrix;       //!< Floating-point 4x4 transformation matrix stored in column-major order.
-        Ref<Accessor> inverseBindMatrices;    //!< The ID of the accessor containing the floating-point 4x4 inverse-bind matrices.
-        std::vector<Ref<Node>> jointNames;    //!< Joint names of the joints (nodes with a jointName property) in this skin.
-        std::string name;                     //!< The user-defined name of this object.
-
-        Skin() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    struct Technique : public Object
-    {
-        struct Parameters
-        {
-
-        };
-
-        struct States
-        {
-
-        };
-
-        struct Functions
-        {
-
-        };
-
-        Technique() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-    //! A texture and its sampler.
-    struct Texture : public Object
-    {
-        Ref<Sampler> sampler; //!< The ID of the sampler used by this texture. (required)
-        Ref<Image> source;    //!< The ID of the image used by this texture. (required)
-
-        //TextureFormat format; //!< The texture's format. (default: TextureFormat_RGBA)
-        //TextureFormat internalFormat; //!< The texture's internal format. (default: TextureFormat_RGBA)
-
-        //TextureTarget target; //!< The target that the WebGL texture should be bound to. (default: TextureTarget_TEXTURE_2D)
-        //TextureType type; //!< Texel datatype. (default: TextureType_UNSIGNED_BYTE)
-
-        Texture() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-
-    //! A light (from KHR_materials_common extension)
-    struct Light : public Object
-    {
-        enum Type
-        {
-            Type_undefined,
-            Type_ambient,
-            Type_directional,
-            Type_point,
-            Type_spot
-        };
-
-        Type type;
-
-        vec4 color;
-        float distance;
-        float constantAttenuation;
-        float linearAttenuation;
-        float quadraticAttenuation;
-        float falloffAngle;
-        float falloffExponent;
-
-        Light() {}
-        void Read(Value& obj, Asset& r);
-
-        void SetDefaults();
-    };
-
-    struct Animation : public Object
-    {
-        struct AnimSampler {
-            std::string id;               //!< The ID of this sampler.
-            std::string input;            //!< The ID of a parameter in this animation to use as key-frame input.
-            std::string interpolation;    //!< Type of interpolation algorithm to use between key-frames.
-            std::string output;           //!< The ID of a parameter in this animation to use as key-frame output.
-        };
-
-        struct AnimChannel {
-            std::string sampler;         //!< The ID of one sampler present in the containing animation's samplers property.
-
-            struct AnimTarget {
-                Ref<Node> id;            //!< The ID of the node to animate.
-                std::string path;        //!< The name of property of the node to animate ("translation", "rotation", or "scale").
-            } target;
-        };
-
-        struct AnimParameters {
-            Ref<Accessor> TIME;           //!< Accessor reference to a buffer storing a array of floating point scalar values.
-            Ref<Accessor> rotation;       //!< Accessor reference to a buffer storing a array of four-component floating-point vectors.
-            Ref<Accessor> scale;          //!< Accessor reference to a buffer storing a array of three-component floating-point vectors.
-            Ref<Accessor> translation;    //!< Accessor reference to a buffer storing a array of three-component floating-point vectors.
-        };
-
-        // AnimChannel Channels[3];            //!< Connect the output values of the key-frame animation to a specific node in the hierarchy.
-        // AnimParameters Parameters;          //!< The samplers that interpolate between the key-frames.
-        // AnimSampler Samplers[3];            //!< The parameterized inputs representing the key-frame data.
-
-        std::vector<AnimChannel> Channels;            //!< Connect the output values of the key-frame animation to a specific node in the hierarchy.
-        AnimParameters Parameters;                    //!< The samplers that interpolate between the key-frames.
-        std::vector<AnimSampler> Samplers;         //!< The parameterized inputs representing the key-frame data.
-
-        Animation() {}
-        void Read(Value& obj, Asset& r);
-    };
-
-
-    //! Base class for LazyDict that acts as an interface
-    class LazyDictBase
-    {
-    public:
-        virtual ~LazyDictBase() {}
-
-        virtual void AttachToDocument(Document& doc) = 0;
-        virtual void DetachFromDocument() = 0;
-
-#if !defined(ASSIMP_BUILD_NO_EXPORT)
-        virtual void WriteObjects(AssetWriter& writer) = 0;
-#endif
-    };
-
-
-    template<class T>
-    class LazyDict;
-
-    //! (Implemented in glTFAssetWriter.h)
-    template<class T>
-    void WriteLazyDict(LazyDict<T>& d, AssetWriter& w);
-
-
-    //! Manages lazy loading of the glTF top-level objects, and keeps a reference to them by ID
-    //! It is the owner the loaded objects, so when it is destroyed it also deletes them
-    template<class T>
-    class LazyDict : public LazyDictBase
-    {
-        friend class Asset;
-        friend class AssetWriter;
-
-        typedef typename std::gltf_unordered_map< std::string, unsigned int > Dict;
-
-        std::vector<T*>  mObjs;      //! The read objects
-        Dict             mObjsById;  //! The read objects accessible by id
-        const char*      mDictId;    //! ID of the dictionary object
-        const char*      mExtId;     //! ID of the extension defining the dictionary
-        Value*           mDict;      //! JSON dictionary object
-        Asset&           mAsset;     //! The asset instance
-
-        void AttachToDocument(Document& doc);
-        void DetachFromDocument();
-
-#if !defined(ASSIMP_BUILD_NO_EXPORT)
-        void WriteObjects(AssetWriter& writer)
-            { WriteLazyDict<T>(*this, writer); }
-#endif
-
-        Ref<T> Add(T* obj);
-
-    public:
-        LazyDict(Asset& asset, const char* dictId, const char* extId = 0);
-        ~LazyDict();
-
-        Ref<T> Get(const char* id);
-        Ref<T> Get(unsigned int i);
-        Ref<T> Get(const std::string& pID) { return Get(pID.c_str()); }
-
-        Ref<T> Create(const char* id);
-        Ref<T> Create(const std::string& id)
-            { return Create(id.c_str()); }
-
-        inline unsigned int Size() const
-            { return unsigned(mObjs.size()); }
-
-        inline T& operator[](size_t i)
-            { return *mObjs[i]; }
-
-    };
-
-
-    struct AssetMetadata
-    {
-        std::string copyright; //!< A copyright message suitable for display to credit the content creator.
-        std::string generator; //!< Tool that generated this glTF model.Useful for debugging.
-        bool premultipliedAlpha; //!< Specifies if the shaders were generated with premultiplied alpha. (default: false)
+    union {
+        struct {
+            float aspectRatio; //!<The floating - point aspect ratio of the field of view. (0 = undefined = use the canvas one)
+            float yfov; //!<The floating - point vertical field of view in radians. (required)
+            float zfar; //!<The floating - point distance to the far clipping plane. (required)
+            float znear; //!< The floating - point distance to the near clipping plane. (required)
+        } perspective;
 
         struct {
-            std::string api;     //!< Specifies the target rendering API (default: "WebGL")
-            std::string version; //!< Specifies the target rendering API (default: "1.0.3")
-        } profile; //!< Specifies the target rendering API and version, e.g., WebGL 1.0.3. (default: {})
+            float xmag; //! The floating-point horizontal magnification of the view. (required)
+            float ymag; //! The floating-point vertical magnification of the view. (required)
+            float zfar; //! The floating-point distance to the far clipping plane. (required)
+            float znear; //! The floating-point distance to the near clipping plane. (required)
+        } ortographic;
+    };
 
-        std::string version; //!< The glTF format version (should be 1.0)
+    Camera() {}
+    void Read(Value &obj, Asset &r);
+};
 
-        void Read(Document& doc);
+//! Image data used to create a texture.
+struct Image : public Object {
+    std::string uri; //! The uri of the image, that can be a file path, a data URI, etc.. (required)
 
-        AssetMetadata()
-            : premultipliedAlpha(false)
-            , version()
-        {
+    Ref<BufferView> bufferView;
+
+    std::string mimeType;
+
+    int width, height;
+
+private:
+    std::unique_ptr<uint8_t[]> mData;
+    size_t mDataLength;
+
+public:
+    Image();
+    void Read(Value &obj, Asset &r);
+
+    inline bool HasData() const { return mDataLength > 0; }
+
+    inline size_t GetDataLength() const { return mDataLength; }
+
+    inline const uint8_t *GetData() const { return mData.get(); }
+
+    inline uint8_t *StealData();
+
+    inline void SetData(uint8_t *data, size_t length, Asset &r);
+};
+
+//! Holds a material property that can be a texture or a color
+struct TexProperty {
+    Ref<Texture> texture;
+    vec4 color;
+};
+
+//! The material appearance of a primitive.
+struct Material : public Object {
+    //Ref<Sampler> source; //!< The ID of the technique.
+    //std::gltf_unordered_map<std::string, std::string> values; //!< A dictionary object of parameter values.
+
+    //! Techniques defined by KHR_materials_common
+    enum Technique {
+        Technique_undefined = 0,
+        Technique_BLINN,
+        Technique_PHONG,
+        Technique_LAMBERT,
+        Technique_CONSTANT
+    };
+
+    TexProperty ambient;
+    TexProperty diffuse;
+    TexProperty specular;
+    TexProperty emission;
+
+    bool doubleSided;
+    bool transparent;
+    float transparency;
+    float shininess;
+
+    Technique technique;
+
+    Material() { SetDefaults(); }
+    void Read(Value &obj, Asset &r);
+    void SetDefaults();
+};
+
+//! A set of primitives to be rendered. A node can contain one or more meshes. A node's transform places the mesh in the scene.
+struct Mesh : public Object {
+    typedef std::vector<Ref<Accessor>> AccessorList;
+
+    struct Primitive {
+        PrimitiveMode mode;
+
+        struct Attributes {
+            AccessorList position, normal, texcoord, color, joint, jointmatrix, weight;
+        } attributes;
+
+        Ref<Accessor> indices;
+
+        Ref<Material> material;
+    };
+
+    /// \struct SExtension
+    /// Extension used for mesh.
+    struct SExtension {
+        /// \enum EType
+        /// Type of extension.
+        enum EType {
+#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
+            Compression_Open3DGC, ///< Compression of mesh data using Open3DGC algorithm.
+#endif
+
+            Unknown
+        };
+
+        EType Type; ///< Type of extension.
+
+        /// \fn SExtension
+        /// Constructor.
+        /// \param [in] pType - type of extension.
+        SExtension(const EType pType) :
+                Type(pType) {}
+
+        virtual ~SExtension() {
+            // empty
         }
     };
 
-    //
-    // glTF Asset class
-    //
+#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
+    /// \struct SCompression_Open3DGC
+    /// Compression of mesh data using Open3DGC algorithm.
+    struct SCompression_Open3DGC : public SExtension {
+        using SExtension::Type;
 
-    //! Root object for a glTF asset
-    class Asset
-    {
-        typedef std::gltf_unordered_map<std::string, int> IdMap;
+        std::string Buffer; ///< ID of "buffer" used for storing compressed data.
+        size_t Offset; ///< Offset in "bufferView" where compressed data are stored.
+        size_t Count; ///< Count of elements in compressed data. Is always equivalent to size in bytes: look comments for "Type" and "Component_Type".
+        bool Binary; ///< If true then "binary" mode is used for coding, if false - "ascii" mode.
+        size_t IndicesCount; ///< Count of indices in mesh.
+        size_t VerticesCount; ///< Count of vertices in mesh.
+        // AttribType::Value Type;///< Is always "SCALAR".
+        // ComponentType Component_Type;///< Is always "ComponentType_UNSIGNED_BYTE" (5121).
 
-        template<class T>
-        friend class LazyDict;
+        /// \fn SCompression_Open3DGC
+        /// Constructor.
+        SCompression_Open3DGC() :
+                SExtension(Compression_Open3DGC) {
+            // empty
+        }
 
-        friend struct Buffer; // To access OpenFile
+        virtual ~SCompression_Open3DGC() {
+            // empty
+        }
+    };
+#endif
 
-        friend class AssetWriter;
+    std::vector<Primitive> primitives;
+    std::list<SExtension *> Extension; ///< List of extensions used in mesh.
 
-    private:
-        IOSystem* mIOSystem;
+    Mesh() {}
 
-        std::string mCurrentAssetDir;
+    /// \fn ~Mesh()
+    /// Destructor.
+    ~Mesh() {
+        for (std::list<SExtension *>::iterator it = Extension.begin(), it_end = Extension.end(); it != it_end; it++) {
+            delete *it;
+        };
+    }
 
-        size_t mSceneLength;
-        size_t mBodyOffset, mBodyLength;
+    /// \fn void Read(Value& pJSON_Object, Asset& pAsset_Root)
+    /// Get mesh data from JSON-object and place them to root asset.
+    /// \param [in] pJSON_Object - reference to pJSON-object from which data are read.
+    /// \param [out] pAsset_Root - reference to root asset where data will be stored.
+    void Read(Value &pJSON_Object, Asset &pAsset_Root);
 
-        std::vector<LazyDictBase*> mDicts;
+#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
+    /// \fn void Decode_O3DGC(const SCompression_Open3DGC& pCompression_Open3DGC, Asset& pAsset_Root)
+    /// Decode part of "buffer" which encoded with Open3DGC algorithm.
+    /// \param [in] pCompression_Open3DGC - reference to structure which describe encoded region.
+    /// \param [out] pAsset_Root - reference to root assed where data will be stored.
+    void Decode_O3DGC(const SCompression_Open3DGC &pCompression_Open3DGC, Asset &pAsset_Root);
+#endif
+};
 
-        IdMap mUsedIds;
+struct Node : public Object {
+    std::vector<Ref<Node>> children;
+    std::vector<Ref<Mesh>> meshes;
 
-        Ref<Buffer> mBodyBuffer;
+    Nullable<mat4> matrix;
+    Nullable<vec3> translation;
+    Nullable<vec4> rotation;
+    Nullable<vec3> scale;
 
-        Asset(Asset&);
-        Asset& operator=(const Asset&);
+    Ref<Camera> camera;
+    Ref<Light> light;
 
-    public:
+    std::vector<Ref<Node>> skeletons; //!< The ID of skeleton nodes. Each of which is the root of a node hierarchy.
+    Ref<Skin> skin; //!< The ID of the skin referenced by this node.
+    std::string jointName; //!< Name used when this node is a joint in a skin.
 
-        //! Keeps info about the enabled extensions
-        struct Extensions
-        {
-            bool KHR_binary_glTF;
-            bool KHR_materials_common;
+    Ref<Node> parent; //!< This is not part of the glTF specification. Used as a helper.
 
-        } extensionsUsed;
+    Node() {}
+    void Read(Value &obj, Asset &r);
+};
 
-        AssetMetadata asset;
+struct Program : public Object {
+    Program() {}
+    void Read(Value &obj, Asset &r);
+};
 
+struct Sampler : public Object {
+    SamplerMagFilter magFilter; //!< The texture magnification filter. (required)
+    SamplerMinFilter minFilter; //!< The texture minification filter. (required)
+    SamplerWrap wrapS; //!< The texture wrapping in the S direction. (required)
+    SamplerWrap wrapT; //!< The texture wrapping in the T direction. (required)
 
-        // Dictionaries for each type of object
+    Sampler() {}
+    void Read(Value &obj, Asset &r);
+    void SetDefaults();
+};
 
-        LazyDict<Accessor>    accessors;
-        LazyDict<Animation>   animations;
-        LazyDict<Buffer>      buffers;
-        LazyDict<BufferView>  bufferViews;
-        LazyDict<Camera>      cameras;
-        LazyDict<Image>       images;
-        LazyDict<Material>    materials;
-        LazyDict<Mesh>        meshes;
-        LazyDict<Node>        nodes;
-        //LazyDict<Program>   programs;
-        LazyDict<Sampler>     samplers;
-        LazyDict<Scene>       scenes;
-        //LazyDict<Shader>    shaders;
-        LazyDict<Skin>      skins;
-        //LazyDict<Technique> techniques;
-        LazyDict<Texture>     textures;
+struct Scene : public Object {
+    std::vector<Ref<Node>> nodes;
 
-        LazyDict<Light>       lights; // KHR_materials_common ext
+    Scene() {}
+    void Read(Value &obj, Asset &r);
+};
 
-        Ref<Scene> scene;
+struct Shader : public Object {
+    Shader() {}
+    void Read(Value &obj, Asset &r);
+};
 
-    public:
-        Asset(IOSystem* io = 0)
-            : mIOSystem(io)
-            , asset()
-            , accessors     (*this, "accessors")
-            , animations    (*this, "animations")
-            , buffers       (*this, "buffers")
-            , bufferViews   (*this, "bufferViews")
-            , cameras       (*this, "cameras")
-            , images        (*this, "images")
-            , materials     (*this, "materials")
-            , meshes        (*this, "meshes")
-            , nodes         (*this, "nodes")
+struct Skin : public Object {
+    Nullable<mat4> bindShapeMatrix; //!< Floating-point 4x4 transformation matrix stored in column-major order.
+    Ref<Accessor> inverseBindMatrices; //!< The ID of the accessor containing the floating-point 4x4 inverse-bind matrices.
+    std::vector<Ref<Node>> jointNames; //!< Joint names of the joints (nodes with a jointName property) in this skin.
+    std::string name; //!< The user-defined name of this object.
+
+    Skin() {}
+    void Read(Value &obj, Asset &r);
+};
+
+struct Technique : public Object {
+    struct Parameters {
+    };
+
+    struct States {
+    };
+
+    struct Functions {
+    };
+
+    Technique() {}
+    void Read(Value &obj, Asset &r);
+};
+
+//! A texture and its sampler.
+struct Texture : public Object {
+    Ref<Sampler> sampler; //!< The ID of the sampler used by this texture. (required)
+    Ref<Image> source; //!< The ID of the image used by this texture. (required)
+
+    //TextureFormat format; //!< The texture's format. (default: TextureFormat_RGBA)
+    //TextureFormat internalFormat; //!< The texture's internal format. (default: TextureFormat_RGBA)
+
+    //TextureTarget target; //!< The target that the WebGL texture should be bound to. (default: TextureTarget_TEXTURE_2D)
+    //TextureType type; //!< Texel datatype. (default: TextureType_UNSIGNED_BYTE)
+
+    Texture() {}
+    void Read(Value &obj, Asset &r);
+};
+
+//! A light (from KHR_materials_common extension)
+struct Light : public Object {
+    enum Type {
+        Type_undefined,
+        Type_ambient,
+        Type_directional,
+        Type_point,
+        Type_spot
+    };
+
+    Type type;
+
+    vec4 color;
+    float distance;
+    float constantAttenuation;
+    float linearAttenuation;
+    float quadraticAttenuation;
+    float falloffAngle;
+    float falloffExponent;
+
+    Light() {}
+    void Read(Value &obj, Asset &r);
+
+    void SetDefaults();
+};
+
+struct Animation : public Object {
+    struct AnimSampler {
+        std::string id; //!< The ID of this sampler.
+        std::string input; //!< The ID of a parameter in this animation to use as key-frame input.
+        std::string interpolation; //!< Type of interpolation algorithm to use between key-frames.
+        std::string output; //!< The ID of a parameter in this animation to use as key-frame output.
+    };
+
+    struct AnimChannel {
+        std::string sampler; //!< The ID of one sampler present in the containing animation's samplers property.
+
+        struct AnimTarget {
+            Ref<Node> id; //!< The ID of the node to animate.
+            std::string path; //!< The name of property of the node to animate ("translation", "rotation", or "scale").
+        } target;
+    };
+
+    struct AnimParameters {
+        Ref<Accessor> TIME; //!< Accessor reference to a buffer storing a array of floating point scalar values.
+        Ref<Accessor> rotation; //!< Accessor reference to a buffer storing a array of four-component floating-point vectors.
+        Ref<Accessor> scale; //!< Accessor reference to a buffer storing a array of three-component floating-point vectors.
+        Ref<Accessor> translation; //!< Accessor reference to a buffer storing a array of three-component floating-point vectors.
+    };
+
+    // AnimChannel Channels[3];            //!< Connect the output values of the key-frame animation to a specific node in the hierarchy.
+    // AnimParameters Parameters;          //!< The samplers that interpolate between the key-frames.
+    // AnimSampler Samplers[3];            //!< The parameterized inputs representing the key-frame data.
+
+    std::vector<AnimChannel> Channels; //!< Connect the output values of the key-frame animation to a specific node in the hierarchy.
+    AnimParameters Parameters; //!< The samplers that interpolate between the key-frames.
+    std::vector<AnimSampler> Samplers; //!< The parameterized inputs representing the key-frame data.
+
+    Animation() {}
+    void Read(Value &obj, Asset &r);
+};
+
+//! Base class for LazyDict that acts as an interface
+class LazyDictBase {
+public:
+    virtual ~LazyDictBase() {}
+
+    virtual void AttachToDocument(Document &doc) = 0;
+    virtual void DetachFromDocument() = 0;
+
+#if !defined(ASSIMP_BUILD_NO_EXPORT)
+    virtual void WriteObjects(AssetWriter &writer) = 0;
+#endif
+};
+
+template <class T>
+class LazyDict;
+
+//! (Implemented in glTFAssetWriter.h)
+template <class T>
+void WriteLazyDict(LazyDict<T> &d, AssetWriter &w);
+
+//! Manages lazy loading of the glTF top-level objects, and keeps a reference to them by ID
+//! It is the owner the loaded objects, so when it is destroyed it also deletes them
+template <class T>
+class LazyDict : public LazyDictBase {
+    friend class Asset;
+    friend class AssetWriter;
+
+    typedef typename std::gltf_unordered_map<std::string, unsigned int> Dict;
+
+    std::vector<T *> mObjs; //! The read objects
+    Dict mObjsById; //! The read objects accessible by id
+    const char *mDictId; //! ID of the dictionary object
+    const char *mExtId; //! ID of the extension defining the dictionary
+    Value *mDict; //! JSON dictionary object
+    Asset &mAsset; //! The asset instance
+
+    void AttachToDocument(Document &doc);
+    void DetachFromDocument();
+
+#if !defined(ASSIMP_BUILD_NO_EXPORT)
+    void WriteObjects(AssetWriter &writer) { WriteLazyDict<T>(*this, writer); }
+#endif
+
+    Ref<T> Add(T *obj);
+
+public:
+    LazyDict(Asset &asset, const char *dictId, const char *extId = 0);
+    ~LazyDict();
+
+    Ref<T> Get(const char *id);
+    Ref<T> Get(unsigned int i);
+    Ref<T> Get(const std::string &pID) { return Get(pID.c_str()); }
+
+    Ref<T> Create(const char *id);
+    Ref<T> Create(const std::string &id) { return Create(id.c_str()); }
+
+    inline unsigned int Size() const { return unsigned(mObjs.size()); }
+
+    inline T &operator[](size_t i) { return *mObjs[i]; }
+};
+
+struct AssetMetadata {
+    std::string copyright; //!< A copyright message suitable for display to credit the content creator.
+    std::string generator; //!< Tool that generated this glTF model.Useful for debugging.
+    bool premultipliedAlpha; //!< Specifies if the shaders were generated with premultiplied alpha. (default: false)
+
+    struct {
+        std::string api; //!< Specifies the target rendering API (default: "WebGL")
+        std::string version; //!< Specifies the target rendering API (default: "1.0.3")
+    } profile; //!< Specifies the target rendering API and version, e.g., WebGL 1.0.3. (default: {})
+
+    std::string version; //!< The glTF format version (should be 1.0)
+
+    void Read(Document &doc);
+
+    AssetMetadata() :
+            premultipliedAlpha(false), version() {
+    }
+};
+
+//
+// glTF Asset class
+//
+
+//! Root object for a glTF asset
+class Asset {
+    typedef std::gltf_unordered_map<std::string, int> IdMap;
+
+    template <class T>
+    friend class LazyDict;
+
+    friend struct Buffer; // To access OpenFile
+
+    friend class AssetWriter;
+
+private:
+    IOSystem *mIOSystem;
+
+    std::string mCurrentAssetDir;
+
+    size_t mSceneLength;
+    size_t mBodyOffset, mBodyLength;
+
+    std::vector<LazyDictBase *> mDicts;
+
+    IdMap mUsedIds;
+
+    Ref<Buffer> mBodyBuffer;
+
+    Asset(Asset &);
+    Asset &operator=(const Asset &);
+
+public:
+    //! Keeps info about the enabled extensions
+    struct Extensions {
+        bool KHR_binary_glTF;
+        bool KHR_materials_common;
+
+    } extensionsUsed;
+
+    AssetMetadata asset;
+
+    // Dictionaries for each type of object
+
+    LazyDict<Accessor> accessors;
+    LazyDict<Animation> animations;
+    LazyDict<Buffer> buffers;
+    LazyDict<BufferView> bufferViews;
+    LazyDict<Camera> cameras;
+    LazyDict<Image> images;
+    LazyDict<Material> materials;
+    LazyDict<Mesh> meshes;
+    LazyDict<Node> nodes;
+    //LazyDict<Program>   programs;
+    LazyDict<Sampler> samplers;
+    LazyDict<Scene> scenes;
+    //LazyDict<Shader>    shaders;
+    LazyDict<Skin> skins;
+    //LazyDict<Technique> techniques;
+    LazyDict<Texture> textures;
+
+    LazyDict<Light> lights; // KHR_materials_common ext
+
+    Ref<Scene> scene;
+
+public:
+    Asset(IOSystem *io = 0) :
+            mIOSystem(io), asset(), accessors(*this, "accessors"), animations(*this, "animations"), buffers(*this, "buffers"), bufferViews(*this, "bufferViews"), cameras(*this, "cameras"), images(*this, "images"), materials(*this, "materials"), meshes(*this, "meshes"), nodes(*this, "nodes")
             //, programs    (*this, "programs")
-            , samplers      (*this, "samplers")
-            , scenes        (*this, "scenes")
+            ,
+            samplers(*this, "samplers"),
+            scenes(*this, "scenes")
             //, shaders     (*this, "shaders")
-            , skins       (*this, "skins")
+            ,
+            skins(*this, "skins")
             //, techniques  (*this, "techniques")
-            , textures      (*this, "textures")
-            , lights        (*this, "lights", "KHR_materials_common")
-        {
-            memset(&extensionsUsed, 0, sizeof(extensionsUsed));
-        }
+            ,
+            textures(*this, "textures"),
+            lights(*this, "lights", "KHR_materials_common") {
+        memset(&extensionsUsed, 0, sizeof(extensionsUsed));
+    }
 
-        //! Main function
-        void Load(const std::string& file, bool isBinary = false);
+    //! Main function
+    void Load(const std::string &file, bool isBinary = false);
 
-        //! Enables the "KHR_binary_glTF" extension on the asset
-        void SetAsBinary();
+    //! Enables the "KHR_binary_glTF" extension on the asset
+    void SetAsBinary();
 
-        //! Search for an available name, starting from the given strings
-        std::string FindUniqueID(const std::string& str, const char* suffix);
+    //! Search for an available name, starting from the given strings
+    std::string FindUniqueID(const std::string &str, const char *suffix);
 
-        Ref<Buffer> GetBodyBuffer()
-            { return mBodyBuffer; }
+    Ref<Buffer> GetBodyBuffer() { return mBodyBuffer; }
 
-    private:
-        void ReadBinaryHeader(IOStream& stream);
+private:
+    void ReadBinaryHeader(IOStream &stream);
 
-        void ReadExtensionsUsed(Document& doc);
+    void ReadExtensionsUsed(Document &doc);
 
-        IOStream *OpenFile(const std::string &path, const char *mode, bool absolute = false);
-    };
+    IOStream *OpenFile(const std::string &path, const char *mode, bool absolute = false);
+};
 
-}
+} // namespace glTF
 
 // Include the implementation of the methods
 #include "glTFAsset.inl"
diff --git a/code/AssetLib/glTF/glTFAsset.inl b/code/AssetLib/glTF/glTFAsset.inl
index e915a3aee..387fd27df 100644
--- a/code/AssetLib/glTF/glTFAsset.inl
+++ b/code/AssetLib/glTF/glTFAsset.inl
@@ -56,130 +56,11 @@ using namespace glTFCommon;
 
 namespace glTF {
 
-namespace {
-
 #if _MSC_VER
 #    pragma warning(push)
 #    pragma warning(disable : 4706)
 #endif // _MSC_VER
 
-//
-// JSON Value reading helpers
-//
-
-template <class T>
-struct ReadHelper {
-    static bool Read(Value &val, T &out) {
-        return val.IsInt() ? out = static_cast<T>(val.GetInt()), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<bool> {
-    static bool Read(Value &val, bool &out) {
-        return val.IsBool() ? out = val.GetBool(), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<float> {
-    static bool Read(Value &val, float &out) {
-        return val.IsNumber() ? out = static_cast<float>(val.GetDouble()), true : false;
-    }
-};
-
-template <unsigned int N>
-struct ReadHelper<float[N]> {
-    static bool Read(Value &val, float (&out)[N]) {
-        if (!val.IsArray() || val.Size() != N) return false;
-        for (unsigned int i = 0; i < N; ++i) {
-            if (val[i].IsNumber())
-                out[i] = static_cast<float>(val[i].GetDouble());
-        }
-        return true;
-    }
-};
-
-template <>
-struct ReadHelper<const char *> {
-    static bool Read(Value &val, const char *&out) {
-        return val.IsString() ? (out = val.GetString(), true) : false;
-    }
-};
-
-template <>
-struct ReadHelper<std::string> {
-    static bool Read(Value &val, std::string &out) {
-        return val.IsString() ? (out = std::string(val.GetString(), val.GetStringLength()), true) : false;
-    }
-};
-
-template <class T>
-struct ReadHelper<Nullable<T>> {
-    static bool Read(Value &val, Nullable<T> &out) {
-        return out.isPresent = ReadHelper<T>::Read(val, out.value);
-    }
-};
-
-template <>
-struct ReadHelper<uint64_t> {
-    static bool Read(Value &val, uint64_t &out) {
-        return val.IsUint64() ? out = val.GetUint64(), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<int64_t> {
-    static bool Read(Value &val, int64_t &out) {
-        return val.IsInt64() ? out = val.GetInt64(), true : false;
-    }
-};
-
-template <class T>
-inline static bool ReadValue(Value &val, T &out) {
-    return ReadHelper<T>::Read(val, out);
-}
-
-template <class T>
-inline static bool ReadMember(Value &obj, const char *id, T &out) {
-    Value::MemberIterator it = obj.FindMember(id);
-    if (it != obj.MemberEnd()) {
-        return ReadHelper<T>::Read(it->value, out);
-    }
-    return false;
-}
-
-template <class T>
-inline static T MemberOrDefault(Value &obj, const char *id, T defaultValue) {
-    T out;
-    return ReadMember(obj, id, out) ? out : defaultValue;
-}
-
-inline Value *FindMember(Value &val, const char *id) {
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd()) ? &it->value : 0;
-}
-
-inline Value *FindString(Value &val, const char *id) {
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd() && it->value.IsString()) ? &it->value : 0;
-}
-
-inline Value *FindNumber(Value &val, const char *id) {
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd() && it->value.IsNumber()) ? &it->value : 0;
-}
-
-inline Value *FindArray(Value &val, const char *id) {
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd() && it->value.IsArray()) ? &it->value : 0;
-}
-
-inline Value *FindObject(Value &val, const char *id) {
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd() && it->value.IsObject()) ? &it->value : 0;
-}
-} // namespace
 
 //
 // LazyDict methods
diff --git a/code/AssetLib/glTF/glTFCommon.h b/code/AssetLib/glTF/glTFCommon.h
index 6f35e7881..78d40ce2c 100644
--- a/code/AssetLib/glTF/glTFCommon.h
+++ b/code/AssetLib/glTF/glTFCommon.h
@@ -56,33 +56,40 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <rapidjson/error/en.h>
 #include <rapidjson/rapidjson.h>
 
+// clang-format off
+
 #ifdef ASSIMP_API
-#include <assimp/ByteSwapper.h>
-#include <assimp/DefaultIOSystem.h>
-#include <memory>
+#   include <assimp/ByteSwapper.h>
+#   include <assimp/DefaultIOSystem.h>
+#   include <memory>
 #else
-#include <memory>
-#define AI_SWAP4(p)
-#define ai_assert
+#   include <memory>
+#   define AI_SWAP4(p)
+#   define ai_assert
 #endif
 
 #if _MSC_VER > 1500 || (defined __GNUC___)
-#define ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
+#   define ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
 #else
-#define gltf_unordered_map map
+#   define gltf_unordered_map map
 #endif
 
 #ifdef ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
-#include <unordered_map>
-#if defined(_MSC_VER) && _MSC_VER <= 1600
-#define gltf_unordered_map tr1::unordered_map
-#else
-#define gltf_unordered_map unordered_map
-#endif
+#   include <unordered_map>
+#   if defined(_MSC_VER) && _MSC_VER <= 1600
+#       define gltf_unordered_map tr1::unordered_map
+#   else
+#       define gltf_unordered_map unordered_map
+#   endif
 #endif
+// clang-format on
+
 
 namespace glTFCommon {
 
+using rapidjson::Document;
+using rapidjson::Value;
+
 #ifdef ASSIMP_API
 using Assimp::IOStream;
 using Assimp::IOSystem;
@@ -193,7 +200,6 @@ inline void CopyValue(const glTFCommon::mat4 &v, aiMatrix4x4 &o) {
 #endif // _MSC_VER
 
 inline std::string getCurrentAssetDir(const std::string &pFile) {
-    std::string path = pFile;
     int pos = std::max(int(pFile.rfind('/')), int(pFile.rfind('\\')));
     if (pos == int(std::string::npos)) {
         return std::string();
@@ -262,6 +268,284 @@ void EncodeBase64(const uint8_t *in, size_t inLength, std::string &out);
 #define CHECK_EXT(EXT) \
     if (exts.find(#EXT) != exts.end()) extensionsUsed.EXT = true;
 
+
+
+//! Helper struct to represent values that might not be present
+template <class T>
+struct Nullable {
+    T value;
+    bool isPresent;
+
+    Nullable() :
+            isPresent(false) {}
+    Nullable(T &val) :
+            value(val),
+            isPresent(true) {}
+};
+
+//! A reference to one top-level object, which is valid
+//! until the Asset instance is destroyed
+template <class T>
+class Ref {
+    std::vector<T *> *vector;
+    unsigned int index;
+
+public:
+    Ref() :
+            vector(0),
+            index(0) {}
+    Ref(std::vector<T *> &vec, unsigned int idx) :
+            vector(&vec),
+            index(idx) {}
+
+    inline unsigned int GetIndex() const { return index; }
+
+    operator bool() const { return vector != 0; }
+
+    T *operator->() { return (*vector)[index]; }
+
+    T &operator*() { return *((*vector)[index]); }
+};
+
+//
+// JSON Value reading helpers
+//
+
+template <class T>
+struct ReadHelper {
+    static bool Read(Value &val, T &out) {
+        return val.IsInt() ? out = static_cast<T>(val.GetInt()), true : false;
+    }
+};
+
+template <>
+struct ReadHelper<bool> {
+    static bool Read(Value &val, bool &out) {
+        return val.IsBool() ? out = val.GetBool(), true : false;
+    }
+};
+
+template <>
+struct ReadHelper<float> {
+    static bool Read(Value &val, float &out) {
+        return val.IsNumber() ? out = static_cast<float>(val.GetDouble()), true : false;
+    }
+};
+
+template <unsigned int N>
+struct ReadHelper<float[N]> {
+    static bool Read(Value &val, float (&out)[N]) {
+        if (!val.IsArray() || val.Size() != N) return false;
+        for (unsigned int i = 0; i < N; ++i) {
+            if (val[i].IsNumber())
+                out[i] = static_cast<float>(val[i].GetDouble());
+        }
+        return true;
+    }
+};
+
+template <>
+struct ReadHelper<const char *> {
+    static bool Read(Value &val, const char *&out) {
+        return val.IsString() ? (out = val.GetString(), true) : false;
+    }
+};
+
+template <>
+struct ReadHelper<std::string> {
+    static bool Read(Value &val, std::string &out) {
+        return val.IsString() ? (out = std::string(val.GetString(), val.GetStringLength()), true) : false;
+    }
+};
+
+template <class T>
+struct ReadHelper<Nullable<T>> {
+    static bool Read(Value &val, Nullable<T> &out) {
+        return out.isPresent = ReadHelper<T>::Read(val, out.value);
+    }
+};
+
+template <>
+struct ReadHelper<uint64_t> {
+    static bool Read(Value &val, uint64_t &out) {
+        return val.IsUint64() ? out = val.GetUint64(), true : false;
+    }
+};
+
+template <>
+struct ReadHelper<int64_t> {
+    static bool Read(Value &val, int64_t &out) {
+        return val.IsInt64() ? out = val.GetInt64(), true : false;
+    }
+};
+
+template <class T>
+inline static bool ReadValue(Value &val, T &out) {
+    return ReadHelper<T>::Read(val, out);
+}
+
+template <class T>
+inline static bool ReadMember(Value &obj, const char *id, T &out) {
+    if (!obj.IsObject()) {
+        return false;
+    }
+    Value::MemberIterator it = obj.FindMember(id);
+    if (it != obj.MemberEnd()) {
+        return ReadHelper<T>::Read(it->value, out);
+    }
+    return false;
+}
+
+template <class T>
+inline static T MemberOrDefault(Value &obj, const char *id, T defaultValue) {
+    T out;
+    return ReadMember(obj, id, out) ? out : defaultValue;
+}
+
+inline Value *FindMember(Value &val, const char *id) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(id);
+    return (it != val.MemberEnd()) ? &it->value : nullptr;
+}
+
+template <int N>
+inline void throwUnexpectedTypeError(const char (&expectedTypeName)[N], const char *memberId, const char *context, const char *extraContext) {
+    std::string fullContext = context;
+    if (extraContext && (strlen(extraContext) > 0)) {
+        fullContext = fullContext + " (" + extraContext + ")";
+    }
+    throw DeadlyImportError("Member \"", memberId, "\" was not of type \"", expectedTypeName, "\" when reading ", fullContext);
+}
+
+// Look-up functions with type checks. Context and extra context help the user identify the problem if there's an error.
+
+inline Value *FindStringInContext(Value &val, const char *memberId, const char *context, const char *extraContext = nullptr) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(memberId);
+    if (it == val.MemberEnd()) {
+        return nullptr;
+    }
+    if (!it->value.IsString()) {
+        throwUnexpectedTypeError("string", memberId, context, extraContext);
+    }
+    return &it->value;
+}
+
+inline Value *FindNumberInContext(Value &val, const char *memberId, const char *context, const char *extraContext = nullptr) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(memberId);
+    if (it == val.MemberEnd()) {
+        return nullptr;
+    }
+    if (!it->value.IsNumber()) {
+        throwUnexpectedTypeError("number", memberId, context, extraContext);
+    }
+    return &it->value;
+}
+
+inline Value *FindUIntInContext(Value &val, const char *memberId, const char *context, const char *extraContext = nullptr) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(memberId);
+    if (it == val.MemberEnd()) {
+        return nullptr;
+    }
+    if (!it->value.IsUint()) {
+        throwUnexpectedTypeError("uint", memberId, context, extraContext);
+    }
+    return &it->value;
+}
+
+inline Value *FindArrayInContext(Value &val, const char *memberId, const char *context, const char *extraContext = nullptr) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(memberId);
+    if (it == val.MemberEnd()) {
+        return nullptr;
+    }
+    if (!it->value.IsArray()) {
+        throwUnexpectedTypeError("array", memberId, context, extraContext);
+    }
+    return &it->value;
+}
+
+inline Value *FindObjectInContext(Value &val, const char *memberId, const char *context, const char *extraContext = nullptr) {
+    if (!val.IsObject()) {
+        return nullptr;
+    }
+    Value::MemberIterator it = val.FindMember(memberId);
+    if (it == val.MemberEnd()) {
+        return nullptr;
+    }
+    if (!it->value.IsObject()) {
+        throwUnexpectedTypeError("object", memberId, context, extraContext);
+    }
+    return &it->value;
+}
+
+inline Value *FindExtensionInContext(Value &val, const char *extensionId, const char *context, const char *extraContext = nullptr) {
+    if (Value *extensionList = FindObjectInContext(val, "extensions", context, extraContext)) {
+        if (Value *extension = FindObjectInContext(*extensionList, extensionId, context, extraContext)) {
+            return extension;
+        }
+    }
+    return nullptr;
+}
+
+// Overloads when the value is the document.
+
+inline Value *FindString(Document &doc, const char *memberId) {
+    return FindStringInContext(doc, memberId, "the document");
+}
+
+inline Value *FindNumber(Document &doc, const char *memberId) {
+    return FindNumberInContext(doc, memberId, "the document");
+}
+
+inline Value *FindUInt(Document &doc, const char *memberId) {
+    return FindUIntInContext(doc, memberId, "the document");
+}
+
+inline Value *FindArray(Document &val, const char *memberId) {
+    return FindArrayInContext(val, memberId, "the document");
+}
+
+inline Value *FindObject(Document &doc, const char *memberId) {
+    return FindObjectInContext(doc, memberId, "the document");
+}
+
+inline Value *FindExtension(Value &val, const char *extensionId) {
+    return FindExtensionInContext(val, extensionId, "the document");
+}
+
+inline Value *FindString(Value &val, const char *id) {
+    Value::MemberIterator it = val.FindMember(id);
+    return (it != val.MemberEnd() && it->value.IsString()) ? &it->value : 0;
+}
+
+inline Value *FindObject(Value &val, const char *id) {
+    Value::MemberIterator it = val.FindMember(id);
+    return (it != val.MemberEnd() && it->value.IsObject()) ? &it->value : 0;
+}
+
+inline Value *FindArray(Value &val, const char *id) {
+    Value::MemberIterator it = val.FindMember(id);
+    return (it != val.MemberEnd() && it->value.IsArray()) ? &it->value : 0;
+}
+
+inline Value *FindNumber(Value &val, const char *id) {
+    Value::MemberIterator it = val.FindMember(id);
+    return (it != val.MemberEnd() && it->value.IsNumber()) ? &it->value : 0;
+}
+
 } // namespace glTFCommon
 
 #endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
diff --git a/code/AssetLib/glTF/glTFExporter.h b/code/AssetLib/glTF/glTFExporter.h
index 1ed3c73ea..bb9d5f05d 100644
--- a/code/AssetLib/glTF/glTFExporter.h
+++ b/code/AssetLib/glTF/glTFExporter.h
@@ -4,7 +4,6 @@ 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,
@@ -41,79 +40,79 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 /** @file GltfExporter.h
-* Declares the exporter class to write a scene to a gltf/glb file
-*/
+ * Declares the exporter class to write a scene to a gltf/glb file
+ */
+#pragma once
 #ifndef AI_GLTFEXPORTER_H_INC
 #define AI_GLTFEXPORTER_H_INC
 
 #if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_EXPORTER)
 
-#include <assimp/types.h>
 #include <assimp/material.h>
+#include <assimp/types.h>
 
-#include <sstream>
-#include <vector>
 #include <map>
 #include <memory>
+#include <sstream>
+#include <vector>
 
 struct aiScene;
 struct aiNode;
-struct aiMaterial;
 
-namespace glTF
-{
-    template<class T>
-    class Ref;
-
-    class Asset;
-    struct TexProperty;
-    struct Node;
-}
-
-namespace Assimp
-{
-    class IOSystem;
-    class IOStream;
-    class ExportProperties;
-
-    // ------------------------------------------------------------------------------------------------
-    /** Helper class to export a given scene to an glTF file. */
-    // ------------------------------------------------------------------------------------------------
-    class glTFExporter
-    {
-    public:
-        /// Constructor for a specific scene to export
-        glTFExporter(const char* filename, IOSystem* pIOSystem, const aiScene* pScene,
-            const ExportProperties* pProperties, bool binary);
-
-    private:
-
-        const char* mFilename;
-        IOSystem* mIOSystem;
-        std::shared_ptr<const aiScene> mScene;
-        const ExportProperties* mProperties;
-
-        std::map<std::string, unsigned int> mTexturesByPath;
-
-        std::shared_ptr<glTF::Asset> mAsset;
-
-        std::vector<unsigned char> mBodyData;
-
-        void WriteBinaryData(IOStream* outfile, std::size_t sceneLength);
-
-        void GetTexSampler(const aiMaterial* mat, glTF::TexProperty& prop);
-        void GetMatColorOrTex(const aiMaterial* mat, glTF::TexProperty& prop, const char* propName, int type, int idx, aiTextureType tt);
-        void ExportMetadata();
-        void ExportMaterials();
-        void ExportMeshes();
-        unsigned int ExportNodeHierarchy(const aiNode* n);
-        unsigned int ExportNode(const aiNode* node, glTF::Ref<glTF::Node>& parent);
-        void ExportScene();
-        void ExportAnimations();
-    };
+namespace glTFCommon {
+template <class T>
+class Ref;
 
 }
 
+namespace glTF {
+class Asset;
+struct TexProperty;
+struct Node;
+
+} // namespace glTF
+
+namespace Assimp {
+class IOSystem;
+class IOStream;
+class ExportProperties;
+
+// ------------------------------------------------------------------------------------------------
+/** Helper class to export a given scene to an glTF file. */
+// ------------------------------------------------------------------------------------------------
+class glTFExporter {
+public:
+    /// Constructor for a specific scene to export
+    glTFExporter(const char *filename, IOSystem *pIOSystem, const aiScene *pScene,
+            const ExportProperties *pProperties, bool binary);
+
+private:
+    const char *mFilename;
+    IOSystem *mIOSystem;
+    std::shared_ptr<const aiScene> mScene;
+    const ExportProperties *mProperties;
+
+    std::map<std::string, unsigned int> mTexturesByPath;
+
+    std::shared_ptr<glTF::Asset> mAsset;
+
+    std::vector<unsigned char> mBodyData;
+
+    void WriteBinaryData(IOStream *outfile, std::size_t sceneLength);
+
+    void GetTexSampler(const aiMaterial *mat, glTF::TexProperty &prop);
+    void GetMatColorOrTex(const aiMaterial *mat, glTF::TexProperty &prop, const char *propName, int type, int idx, aiTextureType tt);
+    void ExportMetadata();
+    void ExportMaterials();
+    void ExportMeshes();
+    unsigned int ExportNodeHierarchy(const aiNode *n);
+    unsigned int ExportNode(const aiNode *node, glTFCommon::Ref<glTF::Node> & parent);
+    void ExportScene();
+    void ExportAnimations();
+};
+
+} // namespace Assimp
+
 #endif // ASSIMP_BUILD_NO_GLTF_EXPORTER
 
 #endif // AI_GLTFEXPORTER_H_INC
diff --git a/code/AssetLib/glTF/glTFImporter.h b/code/AssetLib/glTF/glTFImporter.h
index 3c2a52452..2df60a463 100644
--- a/code/AssetLib/glTF/glTFImporter.h
+++ b/code/AssetLib/glTF/glTFImporter.h
@@ -39,6 +39,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
+#pragma once
 #ifndef AI_GLTFIMPORTER_H_INC
 #define AI_GLTFIMPORTER_H_INC
 
@@ -47,10 +48,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 struct aiNode;
 
-
-namespace glTF
-{
+namespace glTF {
     class Asset;
+
 }
 
 namespace Assimp {
@@ -59,34 +59,31 @@ namespace Assimp {
  * Load the glTF format.
  * https://github.com/KhronosGroup/glTF/tree/master/specification
  */
-class glTFImporter : public BaseImporter{
+class glTFImporter : public BaseImporter {
 public:
     glTFImporter();
-    virtual ~glTFImporter();
-    virtual bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig ) const;
+    ~glTFImporter() override;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
 
 protected:
-    virtual const aiImporterDesc* GetInfo() const;
-    virtual void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler );
+    const aiImporterDesc *GetInfo() const override;
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
 
 private:
+    void ImportEmbeddedTextures(glTF::Asset &a);
+    void ImportMaterials(glTF::Asset &a);
+    void ImportMeshes(glTF::Asset &a);
+    void ImportCameras(glTF::Asset &a);
+    void ImportLights(glTF::Asset &a);
+    void ImportNodes(glTF::Asset &a);
+    void ImportCommonMetadata(glTF::Asset &a);
 
+private:
     std::vector<unsigned int> meshOffsets;
-
     std::vector<int> embeddedTexIdxs;
-
-    aiScene* mScene;
-
-    void ImportEmbeddedTextures(glTF::Asset& a);
-    void ImportMaterials(glTF::Asset& a);
-    void ImportMeshes(glTF::Asset& a);
-    void ImportCameras(glTF::Asset& a);
-    void ImportLights(glTF::Asset& a);
-    void ImportNodes(glTF::Asset& a);
-    void ImportCommonMetadata(glTF::Asset& a);
+    aiScene *mScene;
 };
 
-} // Namespace assimp
+} // namespace Assimp
 
 #endif // AI_GLTFIMPORTER_H_INC
-
diff --git a/code/AssetLib/glTF2/glTF2Asset.h b/code/AssetLib/glTF2/glTF2Asset.h
index cd6c1c89d..9a50ede99 100644
--- a/code/AssetLib/glTF2/glTF2Asset.h
+++ b/code/AssetLib/glTF2/glTF2Asset.h
@@ -65,6 +65,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <string>
 #include <vector>
 
+// clang-format off
 #if (__GNUC__ == 8 && __GNUC_MINOR__ >= 0)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wclass-memaccess"
@@ -75,37 +76,38 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <rapidjson/rapidjson.h>
 
 #if (__GNUC__ == 8 && __GNUC_MINOR__ >= 0)
-#pragma GCC diagnostic pop
+#   pragma GCC diagnostic pop
 #endif
 
 #ifdef ASSIMP_API
-#include <assimp/ByteSwapper.h>
-#include <assimp/DefaultIOSystem.h>
-#include <memory>
+#   include <assimp/ByteSwapper.h>
+#   include <assimp/DefaultIOSystem.h>
+#   include <memory>
 #else
-#include <memory>
-#define AI_SWAP4(p)
-#define ai_assert
+#   include <memory>
+#   define AI_SWAP4(p)
+#   define ai_assert
 #endif
 
 #if _MSC_VER > 1500 || (defined __GNUC___)
-#define ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
+#   define ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
 #else
-#define gltf_unordered_map map
-#define gltf_unordered_set set
+#   define gltf_unordered_map map
+#   define gltf_unordered_set set
 #endif
 
 #ifdef ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
-#include <unordered_map>
-#include <unordered_set>
-#if defined(_MSC_VER) && _MSC_VER <= 1600
-#define gltf_unordered_map tr1::unordered_map
-#define gltf_unordered_set tr1::unordered_set
-#else
-#define gltf_unordered_map unordered_map
-#define gltf_unordered_set unordered_set
-#endif
+#   include <unordered_map>
+#   include <unordered_set>
+#   if defined(_MSC_VER) && _MSC_VER <= 1600
+#       define gltf_unordered_map tr1::unordered_map
+#       define gltf_unordered_set tr1::unordered_set
+#   else
+#      define gltf_unordered_map unordered_map
+#       define gltf_unordered_set unordered_set
+#   endif
 #endif
+// clang-format on
 
 #include <assimp/StringUtils.h>
 
@@ -113,6 +115,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace glTF2 {
 
+using glTFCommon::Nullable;
+using glTFCommon::Ref;
 using glTFCommon::IOStream;
 using glTFCommon::IOSystem;
 using glTFCommon::shared_ptr;
@@ -319,44 +323,9 @@ const AttribType::Info
             { "SCALAR", 1 }, { "VEC2", 2 }, { "VEC3", 3 }, { "VEC4", 4 }, { "MAT2", 4 }, { "MAT3", 9 }, { "MAT4", 16 }
         };
 
-//! A reference to one top-level object, which is valid
-//! until the Asset instance is destroyed
-template <class T>
-class Ref {
-    std::vector<T *> *vector;
-    unsigned int index;
-
-public:
-    Ref() :
-            vector(0),
-            index(0) {}
-    Ref(std::vector<T *> &vec, unsigned int idx) :
-            vector(&vec),
-            index(idx) {}
-
-    inline unsigned int GetIndex() const { return index; }
-
-    operator bool() const { return vector != 0; }
-
-    T *operator->() { return (*vector)[index]; }
-
-    T &operator*() { return *((*vector)[index]); }
-};
-
-//! Helper struct to represent values that might not be present
-template <class T>
-struct Nullable {
-    T value;
-    bool isPresent;
-
-    Nullable() :
-            isPresent(false) {}
-    Nullable(T &val) :
-            value(val),
-            isPresent(true) {}
-};
 
 struct CustomExtension {
+
     //
     // A struct containing custom extension data added to a glTF2 file
     // Has to contain Object, Array, String, Double, Uint64, and Int64 at a minimum
@@ -553,7 +522,7 @@ public:
 
     void MarkAsSpecial() { mIsSpecial = true; }
 
-    bool IsSpecial() const { return mIsSpecial; }
+    bool IsSpecial() const override { return mIsSpecial; }
 
     std::string GetURI() { return std::string(this->id) + ".bin"; }
 
@@ -849,7 +818,7 @@ struct Material : public Object {
 
 //! A set of primitives to be rendered. A node can contain one or more meshes. A node's transform places the mesh in the scene.
 struct Mesh : public Object {
-    typedef std::vector<Ref<Accessor>> AccessorList;
+    using AccessorList = std::vector<Ref<Accessor>>;
 
     struct Primitive {
         PrimitiveMode mode;
@@ -880,7 +849,6 @@ struct Mesh : public Object {
 
     Mesh() {}
 
-    /// \fn void Read(Value& pJSON_Object, Asset& pAsset_Root)
     /// Get mesh data from JSON-object and place them to root asset.
     /// \param [in] pJSON_Object - reference to pJSON-object from which data are read.
     /// \param [out] pAsset_Root - reference to root asset where data will be stored.
@@ -1023,8 +991,8 @@ class LazyDict : public LazyDictBase {
     friend class Asset;
     friend class AssetWriter;
 
-    typedef typename std::gltf_unordered_map<unsigned int, unsigned int> Dict;
-    typedef typename std::gltf_unordered_map<std::string, unsigned int> IdDict;
+    using Dict = typename std::gltf_unordered_map<unsigned int, unsigned int>;
+    using IdDict = typename std::gltf_unordered_map<std::string, unsigned int>;
 
     std::vector<T *> mObjs; //! The read objects
     Dict mObjsByOIndex; //! The read objects accessible by original index
@@ -1087,7 +1055,7 @@ struct AssetMetadata {
 
 //! Root object for a glTF asset
 class Asset {
-    typedef std::gltf_unordered_map<std::string, int> IdMap;
+    using IdMap = std::gltf_unordered_map<std::string, int>;
 
     template <class T>
     friend class LazyDict;
diff --git a/code/AssetLib/glTF2/glTF2Asset.inl b/code/AssetLib/glTF2/glTF2Asset.inl
index 9f793d7c0..4832995cc 100644
--- a/code/AssetLib/glTF2/glTF2Asset.inl
+++ b/code/AssetLib/glTF2/glTF2Asset.inl
@@ -45,40 +45,43 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StringUtils.h>
 #include <assimp/DefaultLogger.hpp>
 
+// clang-format off
 #ifdef ASSIMP_ENABLE_DRACO
 
 // Google draco library headers spew many warnings. Bad Google, no cookie
-#if _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4018) // Signed/unsigned mismatch
-#pragma warning(disable : 4804) // Unsafe use of type 'bool'
-#elif defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wsign-compare"
-#elif defined(__GNUC__)
-#pragma GCC diagnostic push
-#if (__GNUC__ > 4)
-#pragma GCC diagnostic ignored "-Wbool-compare"
-#endif
-#pragma GCC diagnostic ignored "-Wsign-compare"
+#   if _MSC_VER
+#       pragma warning(push)
+#       pragma warning(disable : 4018) // Signed/unsigned mismatch
+#       pragma warning(disable : 4804) // Unsafe use of type 'bool'
+#   elif defined(__clang__)
+#       pragma clang diagnostic push
+#       pragma clang diagnostic ignored "-Wsign-compare"
+#   elif defined(__GNUC__)
+#       pragma GCC diagnostic push
+#       if (__GNUC__ > 4)
+#           pragma GCC diagnostic ignored "-Wbool-compare"
+#       endif
+#   pragma GCC diagnostic ignored "-Wsign-compare"
 #endif
 
 #include "draco/compression/decode.h"
 #include "draco/core/decoder_buffer.h"
 
 #if _MSC_VER
-#pragma warning(pop)
+#   pragma warning(pop)
 #elif defined(__clang__)
-#pragma clang diagnostic pop
+#   pragma clang diagnostic pop
 #elif defined(__GNUC__)
-#pragma GCC diagnostic pop
+#   pragma GCC diagnostic pop
 #endif
 #ifndef DRACO_MESH_COMPRESSION_SUPPORTED
-#error glTF: KHR_draco_mesh_compression: draco library must have DRACO_MESH_COMPRESSION_SUPPORTED
+#   error glTF: KHR_draco_mesh_compression: draco library must have DRACO_MESH_COMPRESSION_SUPPORTED
 #endif
 #endif
+// clang-format on
 
 using namespace Assimp;
+using namespace glTFCommon;
 
 namespace glTF2 {
 
@@ -88,222 +91,6 @@ namespace {
 // JSON Value reading helpers
 //
 
-template <class T>
-struct ReadHelper {
-    static bool Read(Value &val, T &out) {
-        return val.IsInt() ? out = static_cast<T>(val.GetInt()), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<bool> {
-    static bool Read(Value &val, bool &out) {
-        return val.IsBool() ? out = val.GetBool(), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<float> {
-    static bool Read(Value &val, float &out) {
-        return val.IsNumber() ? out = static_cast<float>(val.GetDouble()), true : false;
-    }
-};
-
-template <unsigned int N>
-struct ReadHelper<float[N]> {
-    static bool Read(Value &val, float (&out)[N]) {
-        if (!val.IsArray() || val.Size() != N) return false;
-        for (unsigned int i = 0; i < N; ++i) {
-            if (val[i].IsNumber())
-                out[i] = static_cast<float>(val[i].GetDouble());
-        }
-        return true;
-    }
-};
-
-template <>
-struct ReadHelper<const char *> {
-    static bool Read(Value &val, const char *&out) {
-        return val.IsString() ? (out = val.GetString(), true) : false;
-    }
-};
-
-template <>
-struct ReadHelper<std::string> {
-    static bool Read(Value &val, std::string &out) {
-        return val.IsString() ? (out = std::string(val.GetString(), val.GetStringLength()), true) : false;
-    }
-};
-
-template <>
-struct ReadHelper<uint64_t> {
-    static bool Read(Value &val, uint64_t &out) {
-        return val.IsUint64() ? out = val.GetUint64(), true : false;
-    }
-};
-
-template <>
-struct ReadHelper<int64_t> {
-    static bool Read(Value &val, int64_t &out) {
-        return val.IsInt64() ? out = val.GetInt64(), true : false;
-    }
-};
-
-template <class T>
-struct ReadHelper<Nullable<T>> {
-    static bool Read(Value &val, Nullable<T> &out) {
-        return out.isPresent = ReadHelper<T>::Read(val, out.value);
-    }
-};
-
-template <class T>
-inline static bool ReadValue(Value &val, T &out) {
-    return ReadHelper<T>::Read(val, out);
-}
-
-template <class T>
-inline static bool ReadMember(Value &obj, const char *id, T &out) {
-    if (!obj.IsObject()) {
-        return false;
-    }
-    Value::MemberIterator it = obj.FindMember(id);
-    if (it != obj.MemberEnd()) {
-        return ReadHelper<T>::Read(it->value, out);
-    }
-    return false;
-}
-
-template <class T>
-inline static T MemberOrDefault(Value &obj, const char *id, T defaultValue) {
-    T out;
-    return ReadMember(obj, id, out) ? out : defaultValue;
-}
-
-inline Value *FindMember(Value &val, const char *id) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(id);
-    return (it != val.MemberEnd()) ? &it->value : nullptr;
-}
-
-template<int N>
-inline void throwUnexpectedTypeError(const char (&expectedTypeName)[N], const char* memberId, const char* context, const char* extraContext) {
-    std::string fullContext = context;
-    if (extraContext && (strlen(extraContext) > 0))
-    {
-        fullContext = fullContext + " (" + extraContext + ")";
-    }
-    throw DeadlyImportError("Member \"", memberId, "\" was not of type \"", expectedTypeName, "\" when reading ", fullContext);
-}
-
-// Look-up functions with type checks. Context and extra context help the user identify the problem if there's an error.
-
-inline Value *FindStringInContext(Value &val, const char *memberId, const char* context, const char* extraContext = nullptr) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(memberId);
-    if (it == val.MemberEnd()) {
-        return nullptr;
-    }
-    if (!it->value.IsString()) {
-        throwUnexpectedTypeError("string", memberId, context, extraContext);
-    }
-    return &it->value;
-}
-
-inline Value *FindNumberInContext(Value &val, const char *memberId, const char* context, const char* extraContext = nullptr) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(memberId);
-    if (it == val.MemberEnd()) {
-        return nullptr;
-    }
-    if (!it->value.IsNumber()) {
-        throwUnexpectedTypeError("number", memberId, context, extraContext);
-    }
-    return &it->value;
-}
-
-inline Value *FindUIntInContext(Value &val, const char *memberId, const char* context, const char* extraContext = nullptr) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(memberId);
-    if (it == val.MemberEnd()) {
-        return nullptr;
-    }
-    if (!it->value.IsUint()) {
-        throwUnexpectedTypeError("uint", memberId, context, extraContext);
-    }
-    return &it->value;
-}
-
-inline Value *FindArrayInContext(Value &val, const char *memberId, const char* context, const char* extraContext = nullptr) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(memberId);
-    if (it == val.MemberEnd()) {
-        return nullptr;
-    }
-    if (!it->value.IsArray()) {
-        throwUnexpectedTypeError("array", memberId, context, extraContext);
-    }
-    return &it->value;
-}
-
-inline Value *FindObjectInContext(Value &val, const char *memberId, const char* context, const char* extraContext = nullptr) {
-    if (!val.IsObject()) {
-        return nullptr;
-    }
-    Value::MemberIterator it = val.FindMember(memberId);
-    if (it == val.MemberEnd()) {
-        return nullptr;
-    }
-    if (!it->value.IsObject()) {
-        throwUnexpectedTypeError("object", memberId, context, extraContext);
-    }
-    return &it->value;
-}
-
-inline Value *FindExtensionInContext(Value &val, const char *extensionId, const char* context, const char* extraContext = nullptr) {
-    if (Value *extensionList = FindObjectInContext(val, "extensions", context, extraContext)) {
-        if (Value *extension = FindObjectInContext(*extensionList, extensionId, context, extraContext)) {
-            return extension;
-        }
-    }
-    return nullptr;
-}
-
-// Overloads when the value is the document.
-
-inline Value *FindString(Document &doc, const char *memberId) {
-    return FindStringInContext(doc, memberId, "the document");
-}
-
-inline Value *FindNumber(Document &doc, const char *memberId) {
-    return FindNumberInContext(doc, memberId, "the document");
-}
-
-inline Value *FindUInt(Document &doc, const char *memberId) {
-    return FindUIntInContext(doc, memberId, "the document");
-}
-
-inline Value *FindArray(Document &val, const char *memberId) {
-    return FindArrayInContext(val, memberId, "the document");
-}
-
-inline Value *FindObject(Document &doc, const char *memberId) {
-    return FindObjectInContext(doc, memberId, "the document");
-}
-
-inline Value *FindExtension(Value &val, const char *extensionId) {
-    return FindExtensionInContext(val, extensionId, "the document");
-}
-
 inline CustomExtension ReadExtensions(const char *name, Value &obj) {
     CustomExtension ret;
     ret.name = name;
diff --git a/code/AssetLib/glTF2/glTF2Exporter.cpp b/code/AssetLib/glTF2/glTF2Exporter.cpp
index 47780606f..22db4b26d 100644
--- a/code/AssetLib/glTF2/glTF2Exporter.cpp
+++ b/code/AssetLib/glTF2/glTF2Exporter.cpp
@@ -4,7 +4,6 @@ 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,
@@ -46,21 +45,21 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AssetLib/glTF2/glTF2AssetWriter.h"
 #include "PostProcessing/SplitLargeMeshes.h"
 
-#include <assimp/commonMetaData.h>
-#include <assimp/Exceptional.h>
-#include <assimp/StringComparison.h>
 #include <assimp/ByteSwapper.h>
+#include <assimp/Exceptional.h>
 #include <assimp/SceneCombiner.h>
-#include <assimp/version.h>
-#include <assimp/IOSystem.hpp>
-#include <assimp/Exporter.hpp>
+#include <assimp/StringComparison.h>
+#include <assimp/commonMetaData.h>
 #include <assimp/material.h>
 #include <assimp/scene.h>
+#include <assimp/version.h>
+#include <assimp/Exporter.hpp>
+#include <assimp/IOSystem.hpp>
 
 // Header files, standard library.
-#include <memory>
+#include <cinttypes>
 #include <limits>
-#include <inttypes.h>
+#include <memory>
 
 using namespace rapidjson;
 
@@ -69,32 +68,25 @@ using namespace glTF2;
 
 namespace Assimp {
 
-    // ------------------------------------------------------------------------------------------------
-    // Worker function for exporting a scene to GLTF. Prototyped and registered in Exporter.cpp
-    void ExportSceneGLTF2(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
-    {
-        // invoke the exporter
-        glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, false);
-    }
+// ------------------------------------------------------------------------------------------------
+// Worker function for exporting a scene to GLTF. Prototyped and registered in Exporter.cpp
+void ExportSceneGLTF2(const char *pFile, IOSystem *pIOSystem, const aiScene *pScene, const ExportProperties *pProperties) {
+    // invoke the exporter
+    glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, false);
+}
 
-    // ------------------------------------------------------------------------------------------------
-    // Worker function for exporting a scene to GLB. Prototyped and registered in Exporter.cpp
-    void ExportSceneGLB2(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
-    {
-        // invoke the exporter
-        glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, true);
-    }
+// ------------------------------------------------------------------------------------------------
+// Worker function for exporting a scene to GLB. Prototyped and registered in Exporter.cpp
+void ExportSceneGLB2(const char *pFile, IOSystem *pIOSystem, const aiScene *pScene, const ExportProperties *pProperties) {
+    // invoke the exporter
+    glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, true);
+}
 
 } // end of namespace Assimp
 
-glTF2Exporter::glTF2Exporter(const char* filename, IOSystem* pIOSystem, const aiScene* pScene,
-    const ExportProperties* pProperties, bool isBinary)
-    : mFilename(filename)
-    , mIOSystem(pIOSystem)
-    , mScene(pScene)
-    , mProperties(pProperties)
-    , mAsset(new Asset(pIOSystem))
-{
+glTF2Exporter::glTF2Exporter(const char *filename, IOSystem *pIOSystem, const aiScene *pScene,
+        const ExportProperties *pProperties, bool isBinary) :
+        mFilename(filename), mIOSystem(pIOSystem), mScene(pScene), mProperties(pProperties), mAsset(new Asset(pIOSystem)) {
     // Always on as our triangulation process is aware of this type of encoding
     mAsset->extensionsUsed.FB_ngon_encoding = true;
 
@@ -118,10 +110,9 @@ glTF2Exporter::glTF2Exporter(const char* filename, IOSystem* pIOSystem, const ai
     ExportAnimations();
 
     // export extras
-    if(mProperties->HasPropertyCallback("extras"))
-    {
-        std::function<void*(void*)> ExportExtras = mProperties->GetPropertyCallback("extras");
-        mAsset->extras = (rapidjson::Value*)ExportExtras(0);
+    if (mProperties->HasPropertyCallback("extras")) {
+        std::function<void *(void *)> ExportExtras = mProperties->GetPropertyCallback("extras");
+        mAsset->extras = (rapidjson::Value *)ExportExtras(0);
     }
 
     AssetWriter writer(*mAsset);
@@ -141,85 +132,107 @@ glTF2Exporter::~glTF2Exporter() {
  * Copy a 4x4 matrix from struct aiMatrix to typedef mat4.
  * Also converts from row-major to column-major storage.
  */
-static void CopyValue(const aiMatrix4x4& v, mat4& o) {
-    o[ 0] = v.a1; o[ 1] = v.b1; o[ 2] = v.c1; o[ 3] = v.d1;
-    o[ 4] = v.a2; o[ 5] = v.b2; o[ 6] = v.c2; o[ 7] = v.d2;
-    o[ 8] = v.a3; o[ 9] = v.b3; o[10] = v.c3; o[11] = v.d3;
-    o[12] = v.a4; o[13] = v.b4; o[14] = v.c4; o[15] = v.d4;
+static void CopyValue(const aiMatrix4x4 &v, mat4 &o) {
+    o[0] = v.a1;
+    o[1] = v.b1;
+    o[2] = v.c1;
+    o[3] = v.d1;
+    o[4] = v.a2;
+    o[5] = v.b2;
+    o[6] = v.c2;
+    o[7] = v.d2;
+    o[8] = v.a3;
+    o[9] = v.b3;
+    o[10] = v.c3;
+    o[11] = v.d3;
+    o[12] = v.a4;
+    o[13] = v.b4;
+    o[14] = v.c4;
+    o[15] = v.d4;
 }
 
-static void CopyValue(const aiMatrix4x4& v, aiMatrix4x4& o) {
+static void CopyValue(const aiMatrix4x4 &v, aiMatrix4x4 &o) {
     memcpy(&o, &v, sizeof(aiMatrix4x4));
 }
 
-static void IdentityMatrix4(mat4& o) {
-    o[ 0] = 1; o[ 1] = 0; o[ 2] = 0; o[ 3] = 0;
-    o[ 4] = 0; o[ 5] = 1; o[ 6] = 0; o[ 7] = 0;
-    o[ 8] = 0; o[ 9] = 0; o[10] = 1; o[11] = 0;
-    o[12] = 0; o[13] = 0; o[14] = 0; o[15] = 1;
+static void IdentityMatrix4(mat4 &o) {
+    o[0] = 1;
+    o[1] = 0;
+    o[2] = 0;
+    o[3] = 0;
+    o[4] = 0;
+    o[5] = 1;
+    o[6] = 0;
+    o[7] = 0;
+    o[8] = 0;
+    o[9] = 0;
+    o[10] = 1;
+    o[11] = 0;
+    o[12] = 0;
+    o[13] = 0;
+    o[14] = 0;
+    o[15] = 1;
 }
 
-template<typename T>
-void SetAccessorRange(Ref<Accessor> acc, void* data, size_t count,
-	unsigned int numCompsIn, unsigned int numCompsOut)
-{
-	ai_assert(numCompsOut <= numCompsIn);
+template <typename T>
+void SetAccessorRange(Ref<Accessor> acc, void *data, size_t count,
+        unsigned int numCompsIn, unsigned int numCompsOut) {
+    ai_assert(numCompsOut <= numCompsIn);
 
-	// Allocate and initialize with large values.
-	for (unsigned int i = 0 ; i < numCompsOut ; i++) {
-		acc->min.push_back( std::numeric_limits<double>::max());
-		acc->max.push_back(-std::numeric_limits<double>::max());
-	}
+    // Allocate and initialize with large values.
+    for (unsigned int i = 0; i < numCompsOut; i++) {
+        acc->min.push_back(std::numeric_limits<double>::max());
+        acc->max.push_back(-std::numeric_limits<double>::max());
+    }
 
-	size_t totalComps = count * numCompsIn;
-	T* buffer_ptr = static_cast<T*>(data);
-	T* buffer_end = buffer_ptr + totalComps;
+    size_t totalComps = count * numCompsIn;
+    T *buffer_ptr = static_cast<T *>(data);
+    T *buffer_end = buffer_ptr + totalComps;
 
-	// Search and set extreme values.
-	for (; buffer_ptr < buffer_end ; buffer_ptr += numCompsIn) {
-		for (unsigned int j = 0 ; j < numCompsOut ; j++) {
-			double valueTmp = buffer_ptr[j];
+    // Search and set extreme values.
+    for (; buffer_ptr < buffer_end; buffer_ptr += numCompsIn) {
+        for (unsigned int j = 0; j < numCompsOut; j++) {
+            double valueTmp = buffer_ptr[j];
 
-			// Gracefully tolerate rogue NaN's in buffer data
-			// Any NaNs/Infs introduced in accessor bounds will end up in
-			// document and prevent rapidjson from writing out valid JSON
-			if (!std::isfinite(valueTmp)) {
-				continue;
-			}
+            // Gracefully tolerate rogue NaN's in buffer data
+            // Any NaNs/Infs introduced in accessor bounds will end up in
+            // document and prevent rapidjson from writing out valid JSON
+            if (!std::isfinite(valueTmp)) {
+                continue;
+            }
 
-			if (valueTmp < acc->min[j]) {
-				acc->min[j] = valueTmp;
-			}
-			if (valueTmp > acc->max[j]) {
-				acc->max[j] = valueTmp;
-			}
-		}
-	}
+            if (valueTmp < acc->min[j]) {
+                acc->min[j] = valueTmp;
+            }
+            if (valueTmp > acc->max[j]) {
+                acc->max[j] = valueTmp;
+            }
+        }
+    }
 }
 
-inline void SetAccessorRange(ComponentType compType, Ref<Accessor> acc, void* data,
-		size_t count, unsigned int numCompsIn, unsigned int numCompsOut)
-{
-	switch (compType) {
-		case ComponentType_SHORT:
-			SetAccessorRange<short>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-		case ComponentType_UNSIGNED_SHORT:
-			SetAccessorRange<unsigned short>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-		case ComponentType_UNSIGNED_INT:
-			SetAccessorRange<unsigned int>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-		case ComponentType_FLOAT:
-			SetAccessorRange<float>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-		case ComponentType_BYTE:
-			SetAccessorRange<int8_t>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-		case ComponentType_UNSIGNED_BYTE:
-			SetAccessorRange<uint8_t>(acc, data, count, numCompsIn, numCompsOut);
-			return;
-	}
+inline void SetAccessorRange(ComponentType compType, Ref<Accessor> acc, void *data,
+        size_t count, unsigned int numCompsIn, unsigned int numCompsOut) {
+    switch (compType) {
+    case ComponentType_SHORT:
+        SetAccessorRange<short>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    case ComponentType_UNSIGNED_SHORT:
+        SetAccessorRange<unsigned short>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    case ComponentType_UNSIGNED_INT:
+        SetAccessorRange<unsigned int>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    case ComponentType_FLOAT:
+        SetAccessorRange<float>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    case ComponentType_BYTE:
+        SetAccessorRange<int8_t>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    case ComponentType_UNSIGNED_BYTE:
+        SetAccessorRange<uint8_t>(acc, data, count, numCompsIn, numCompsOut);
+        return;
+    }
 }
 
 // compute the (data-dataBase), store the non-zero data items
@@ -369,14 +382,13 @@ inline Ref<Accessor> ExportDataSparse(Asset &a, std::string &meshName, Ref<Buffe
         acc->WriteSparseValues(nzCount, nzDiff, numCompsIn * bytesPerComp);
 
         //clear
-        delete[] (char*)nzDiff;
-        delete[] (char*)nzIdx;
+        delete[](char *) nzDiff;
+        delete[](char *) nzIdx;
     }
     return acc;
 }
-inline Ref<Accessor> ExportData(Asset& a, std::string& meshName, Ref<Buffer>& buffer,
-    size_t count, void* data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE)
-{
+inline Ref<Accessor> ExportData(Asset &a, std::string &meshName, Ref<Buffer> &buffer,
+        size_t count, void *data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE) {
     if (!count || !data) {
         return Ref<Accessor>();
     }
@@ -409,33 +421,31 @@ inline Ref<Accessor> ExportData(Asset& a, std::string& meshName, Ref<Buffer>& bu
     acc->type = typeOut;
 
     // calculate min and max values
-	SetAccessorRange(compType, acc, data, count, numCompsIn, numCompsOut);
+    SetAccessorRange(compType, acc, data, count, numCompsIn, numCompsOut);
 
     // copy the data
-    acc->WriteData(count, data, numCompsIn*bytesPerComp);
+    acc->WriteData(count, data, numCompsIn * bytesPerComp);
 
     return acc;
 }
 
-inline void SetSamplerWrap(SamplerWrap& wrap, aiTextureMapMode map)
-{
+inline void SetSamplerWrap(SamplerWrap &wrap, aiTextureMapMode map) {
     switch (map) {
-        case aiTextureMapMode_Clamp:
-            wrap = SamplerWrap::Clamp_To_Edge;
-            break;
-        case aiTextureMapMode_Mirror:
-            wrap = SamplerWrap::Mirrored_Repeat;
-            break;
-        case aiTextureMapMode_Wrap:
-        case aiTextureMapMode_Decal:
-        default:
-            wrap = SamplerWrap::Repeat;
-            break;
+    case aiTextureMapMode_Clamp:
+        wrap = SamplerWrap::Clamp_To_Edge;
+        break;
+    case aiTextureMapMode_Mirror:
+        wrap = SamplerWrap::Mirrored_Repeat;
+        break;
+    case aiTextureMapMode_Wrap:
+    case aiTextureMapMode_Decal:
+    default:
+        wrap = SamplerWrap::Repeat;
+        break;
     };
 }
 
-void glTF2Exporter::GetTexSampler(const aiMaterial& mat, Ref<Texture> texture, aiTextureType tt, unsigned int slot)
-{
+void glTF2Exporter::GetTexSampler(const aiMaterial &mat, Ref<Texture> texture, aiTextureType tt, unsigned int slot) {
     aiString aId;
     std::string id;
     if (aiGetMaterialString(&mat, AI_MATKEY_GLTF_MAPPINGID(tt, slot), &aId) == AI_SUCCESS) {
@@ -453,19 +463,19 @@ void glTF2Exporter::GetTexSampler(const aiMaterial& mat, Ref<Texture> texture, a
         SamplerMagFilter filterMag;
         SamplerMinFilter filterMin;
 
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_U(tt, slot), (int*)&mapU) == AI_SUCCESS) {
+        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_U(tt, slot), (int *)&mapU) == AI_SUCCESS) {
             SetSamplerWrap(texture->sampler->wrapS, mapU);
         }
 
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_V(tt, slot), (int*)&mapV) == AI_SUCCESS) {
+        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_V(tt, slot), (int *)&mapV) == AI_SUCCESS) {
             SetSamplerWrap(texture->sampler->wrapT, mapV);
         }
 
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MAG(tt, slot), (int*)&filterMag) == AI_SUCCESS) {
+        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MAG(tt, slot), (int *)&filterMag) == AI_SUCCESS) {
             texture->sampler->magFilter = filterMag;
         }
 
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MIN(tt, slot), (int*)&filterMin) == AI_SUCCESS) {
+        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MIN(tt, slot), (int *)&filterMin) == AI_SUCCESS) {
             texture->sampler->minFilter = filterMin;
         }
 
@@ -476,22 +486,19 @@ void glTF2Exporter::GetTexSampler(const aiMaterial& mat, Ref<Texture> texture, a
     }
 }
 
-void glTF2Exporter::GetMatTexProp(const aiMaterial& mat, unsigned int& prop, const char* propName, aiTextureType tt, unsigned int slot)
-{
+void glTF2Exporter::GetMatTexProp(const aiMaterial &mat, unsigned int &prop, const char *propName, aiTextureType tt, unsigned int slot) {
     std::string textureKey = std::string(_AI_MATKEY_TEXTURE_BASE) + "." + propName;
 
     mat.Get(textureKey.c_str(), tt, slot, prop);
 }
 
-void glTF2Exporter::GetMatTexProp(const aiMaterial& mat, float& prop, const char* propName, aiTextureType tt, unsigned int slot)
-{
+void glTF2Exporter::GetMatTexProp(const aiMaterial &mat, float &prop, const char *propName, aiTextureType tt, unsigned int slot) {
     std::string textureKey = std::string(_AI_MATKEY_TEXTURE_BASE) + "." + propName;
 
     mat.Get(textureKey.c_str(), tt, slot, prop);
 }
 
-void glTF2Exporter::GetMatTex(const aiMaterial& mat, Ref<Texture>& texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot = 0)
-{
+void glTF2Exporter::GetMatTex(const aiMaterial &mat, Ref<Texture> &texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot = 0) {
     if (mat.GetTextureCount(tt) > 0) {
         aiString tex;
 
@@ -516,28 +523,25 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, Ref<Texture>& texture, unsi
                     std::string imgId = mAsset->FindUniqueID("", "image");
                     texture->source = mAsset->images.Create(imgId);
 
-                    const aiTexture* curTex = mScene->GetEmbeddedTexture(path.c_str());
+                    const aiTexture *curTex = mScene->GetEmbeddedTexture(path.c_str());
                     if (curTex != nullptr) { // embedded
                         texture->source->name = curTex->mFilename.C_Str();
 
                         //basisu: embedded ktx2, bu
                         if (curTex->achFormatHint[0]) {
                             std::string mimeType = "image/";
-                            if(memcmp(curTex->achFormatHint, "jpg", 3) == 0)
+                            if (memcmp(curTex->achFormatHint, "jpg", 3) == 0)
                                 mimeType += "jpeg";
-                            else if(memcmp(curTex->achFormatHint, "ktx", 3) == 0) {
+                            else if (memcmp(curTex->achFormatHint, "ktx", 3) == 0) {
                                 useBasisUniversal = true;
                                 mimeType += "ktx";
-                            }
-                            else if(memcmp(curTex->achFormatHint, "kx2", 3) == 0) {
+                            } else if (memcmp(curTex->achFormatHint, "kx2", 3) == 0) {
                                 useBasisUniversal = true;
                                 mimeType += "ktx2";
-                            }
-                            else if(memcmp(curTex->achFormatHint, "bu", 2) == 0) {
+                            } else if (memcmp(curTex->achFormatHint, "bu", 2) == 0) {
                                 useBasisUniversal = true;
                                 mimeType += "basis";
-                            }
-                            else
+                            } else
                                 mimeType += curTex->achFormatHint;
                             texture->source->mimeType = mimeType;
                         }
@@ -545,18 +549,16 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, Ref<Texture>& texture, unsi
                         // The asset has its own buffer, see Image::SetData
                         //basisu: "image/ktx2", "image/basis" as is
                         texture->source->SetData(reinterpret_cast<uint8_t *>(curTex->pcData), curTex->mWidth, *mAsset);
-                    }
-                    else {
+                    } else {
                         texture->source->uri = path;
-                        if(texture->source->uri.find(".ktx")!=std::string::npos ||
-                           texture->source->uri.find(".basis")!=std::string::npos)
-                        {
+                        if (texture->source->uri.find(".ktx") != std::string::npos ||
+                                texture->source->uri.find(".basis") != std::string::npos) {
                             useBasisUniversal = true;
                         }
                     }
 
                     //basisu
-                    if(useBasisUniversal) {
+                    if (useBasisUniversal) {
                         mAsset->extensionsUsed.KHR_texture_basisu = true;
                         mAsset->extensionsRequired.KHR_texture_basisu = true;
                     }
@@ -568,9 +570,8 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, Ref<Texture>& texture, unsi
     }
 }
 
-void glTF2Exporter::GetMatTex(const aiMaterial& mat, TextureInfo& prop, aiTextureType tt, unsigned int slot = 0)
-{
-    Ref<Texture>& texture = prop.texture;
+void glTF2Exporter::GetMatTex(const aiMaterial &mat, TextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
+    Ref<Texture> &texture = prop.texture;
 
     GetMatTex(mat, texture, prop.texCoord, tt, slot);
 
@@ -579,9 +580,8 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, TextureInfo& prop, aiTextur
     //}
 }
 
-void glTF2Exporter::GetMatTex(const aiMaterial& mat, NormalTextureInfo& prop, aiTextureType tt, unsigned int slot = 0)
-{
-    Ref<Texture>& texture = prop.texture;
+void glTF2Exporter::GetMatTex(const aiMaterial &mat, NormalTextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
+    Ref<Texture> &texture = prop.texture;
 
     GetMatTex(mat, texture, prop.texCoord, tt, slot);
 
@@ -591,9 +591,8 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, NormalTextureInfo& prop, ai
     }
 }
 
-void glTF2Exporter::GetMatTex(const aiMaterial& mat, OcclusionTextureInfo& prop, aiTextureType tt, unsigned int slot = 0)
-{
-    Ref<Texture>& texture = prop.texture;
+void glTF2Exporter::GetMatTex(const aiMaterial &mat, OcclusionTextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
+    Ref<Texture> &texture = prop.texture;
 
     GetMatTex(mat, texture, prop.texCoord, tt, slot);
 
@@ -603,20 +602,21 @@ void glTF2Exporter::GetMatTex(const aiMaterial& mat, OcclusionTextureInfo& prop,
     }
 }
 
-aiReturn glTF2Exporter::GetMatColor(const aiMaterial& mat, vec4& prop, const char* propName, int type, int idx) const
-{
+aiReturn glTF2Exporter::GetMatColor(const aiMaterial &mat, vec4 &prop, const char *propName, int type, int idx) const {
     aiColor4D col;
     aiReturn result = mat.Get(propName, type, idx, col);
 
     if (result == AI_SUCCESS) {
-        prop[0] = col.r; prop[1] = col.g; prop[2] = col.b; prop[3] = col.a;
+        prop[0] = col.r;
+        prop[1] = col.g;
+        prop[2] = col.b;
+        prop[3] = col.a;
     }
 
     return result;
 }
 
-aiReturn glTF2Exporter::GetMatColor(const aiMaterial& mat, vec3& prop, const char* propName, int type, int idx) const
-{
+aiReturn glTF2Exporter::GetMatColor(const aiMaterial &mat, vec3 &prop, const char *propName, int type, int idx) const {
     aiColor3D col;
     aiReturn result = mat.Get(propName, type, idx, col);
 
@@ -704,13 +704,12 @@ bool glTF2Exporter::GetMatTransmission(const aiMaterial &mat, glTF2::MaterialTra
     return result || transmission.transmissionTexture.texture;
 }
 
-void glTF2Exporter::ExportMaterials()
-{
+void glTF2Exporter::ExportMaterials() {
     aiString aiName;
     for (unsigned int i = 0; i < mScene->mNumMaterials; ++i) {
         ai_assert(mScene->mMaterials[i] != nullptr);
 
-        const aiMaterial & mat = *(mScene->mMaterials[i]);
+        const aiMaterial &mat = *(mScene->mMaterials[i]);
 
         std::string id = "material_" + ai_to_string(i);
 
@@ -751,9 +750,8 @@ void glTF2Exporter::ExportMaterials()
             ai_real shininess;
 
             if (
-                mat.Get(AI_MATKEY_COLOR_SPECULAR, specularColor) == AI_SUCCESS &&
-                mat.Get(AI_MATKEY_SHININESS, shininess) == AI_SUCCESS
-            ) {
+                    mat.Get(AI_MATKEY_COLOR_SPECULAR, specularColor) == AI_SUCCESS &&
+                    mat.Get(AI_MATKEY_SHININESS, shininess) == AI_SUCCESS) {
                 // convert specular color to luminance
                 float specularIntensity = specularColor[0] * 0.2125f + specularColor[1] * 0.7154f + specularColor[2] * 0.0721f;
                 //normalize shininess (assuming max is 1000) with an inverse exponentional curve
@@ -844,7 +842,7 @@ bool FindMeshNode(Ref<Node> &nodeIn, Ref<Node> &meshNode, const std::string &mes
     }
 
     for (unsigned int i = 0; i < nodeIn->children.size(); ++i) {
-        if(FindMeshNode(nodeIn->children[i], meshNode, meshID)) {
+        if (FindMeshNode(nodeIn->children[i], meshNode, meshID)) {
             return true;
         }
     }
@@ -858,8 +856,7 @@ bool FindMeshNode(Ref<Node> &nodeIn, Ref<Node> &meshNode, const std::string &mes
  * until a parent is found that does not have a jointName.
  * Returns the first parent Ref<Node> found that does not have a jointName.
  */
-Ref<Node> FindSkeletonRootJoint(Ref<Skin>& skinRef)
-{
+Ref<Node> FindSkeletonRootJoint(Ref<Skin> &skinRef) {
     Ref<Node> startNodeRef;
     Ref<Node> parentNodeRef;
 
@@ -875,17 +872,16 @@ Ref<Node> FindSkeletonRootJoint(Ref<Skin>& skinRef)
     return parentNodeRef;
 }
 
-void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buffer>& bufferRef, Ref<Skin>& skinRef, std::vector<aiMatrix4x4>& inverseBindMatricesData)
-{
+void ExportSkin(Asset &mAsset, const aiMesh *aimesh, Ref<Mesh> &meshRef, Ref<Buffer> &bufferRef, Ref<Skin> &skinRef, std::vector<aiMatrix4x4> &inverseBindMatricesData) {
     if (aimesh->mNumBones < 1) {
         return;
     }
 
     // Store the vertex joint and weight data.
-    const size_t NumVerts( aimesh->mNumVertices );
-    vec4* vertexJointData = new vec4[ NumVerts ];
-    vec4* vertexWeightData = new vec4[ NumVerts ];
-    int* jointsPerVertex = new int[ NumVerts ];
+    const size_t NumVerts(aimesh->mNumVertices);
+    vec4 *vertexJointData = new vec4[NumVerts];
+    vec4 *vertexWeightData = new vec4[NumVerts];
+    int *jointsPerVertex = new int[NumVerts];
     for (size_t i = 0; i < NumVerts; ++i) {
         jointsPerVertex[i] = 0;
         for (size_t j = 0; j < 4; ++j) {
@@ -895,7 +891,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
     }
 
     for (unsigned int idx_bone = 0; idx_bone < aimesh->mNumBones; ++idx_bone) {
-        const aiBone* aib = aimesh->mBones[idx_bone];
+        const aiBone *aib = aimesh->mBones[idx_bone];
 
         // aib->mName   =====>  skinRef->jointNames
         // Find the node with id = mName.
@@ -904,7 +900,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
 
         unsigned int jointNamesIndex = 0;
         bool addJointToJointNames = true;
-        for ( unsigned int idx_joint = 0; idx_joint < skinRef->jointNames.size(); ++idx_joint) {
+        for (unsigned int idx_joint = 0; idx_joint < skinRef->jointNames.size(); ++idx_joint) {
             if (skinRef->jointNames[idx_joint]->jointName.compare(nodeRef->jointName) == 0) {
                 addJointToJointNames = false;
                 jointNamesIndex = idx_joint;
@@ -924,7 +920,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
         // aib->mWeights   =====>  vertexWeightData
         for (unsigned int idx_weights = 0; idx_weights < aib->mNumWeights; ++idx_weights) {
             unsigned int vertexId = aib->mWeights[idx_weights].mVertexId;
-            float vertWeight      = aib->mWeights[idx_weights].mWeight;
+            float vertWeight = aib->mWeights[idx_weights].mWeight;
 
             // A vertex can only have at most four joint weights. Ignore all others.
             if (jointsPerVertex[vertexId] > 3) {
@@ -939,44 +935,43 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
 
     } // End: for-loop mNumMeshes
 
-    Mesh::Primitive& p = meshRef->primitives.back();
+    Mesh::Primitive &p = meshRef->primitives.back();
     Ref<Accessor> vertexJointAccessor = ExportData(mAsset, skinRef->id, bufferRef, aimesh->mNumVertices, vertexJointData, AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
-    if ( vertexJointAccessor ) {
+    if (vertexJointAccessor) {
         size_t offset = vertexJointAccessor->bufferView->byteOffset;
         size_t bytesLen = vertexJointAccessor->bufferView->byteLength;
-        unsigned int s_bytesPerComp= ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
+        unsigned int s_bytesPerComp = ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
         unsigned int bytesPerComp = ComponentTypeSize(vertexJointAccessor->componentType);
         size_t s_bytesLen = bytesLen * s_bytesPerComp / bytesPerComp;
         Ref<Buffer> buf = vertexJointAccessor->bufferView->buffer;
-        uint8_t* arrys = new uint8_t[bytesLen];
+        uint8_t *arrys = new uint8_t[bytesLen];
         unsigned int i = 0;
-        for ( unsigned int j = 0; j <= bytesLen; j += bytesPerComp ){
+        for (unsigned int j = 0; j <= bytesLen; j += bytesPerComp) {
             size_t len_p = offset + j;
             float f_value = *(float *)&buf->GetPointer()[len_p];
             unsigned short c = static_cast<unsigned short>(f_value);
-            memcpy(&arrys[i*s_bytesPerComp], &c, s_bytesPerComp);
+            memcpy(&arrys[i * s_bytesPerComp], &c, s_bytesPerComp);
             ++i;
         }
         buf->ReplaceData_joint(offset, bytesLen, arrys, bytesLen);
         vertexJointAccessor->componentType = ComponentType_UNSIGNED_SHORT;
         vertexJointAccessor->bufferView->byteLength = s_bytesLen;
 
-        p.attributes.joint.push_back( vertexJointAccessor );
+        p.attributes.joint.push_back(vertexJointAccessor);
         delete[] arrys;
     }
 
     Ref<Accessor> vertexWeightAccessor = ExportData(mAsset, skinRef->id, bufferRef, aimesh->mNumVertices,
             vertexWeightData, AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
-    if ( vertexWeightAccessor ) {
-        p.attributes.weight.push_back( vertexWeightAccessor );
+    if (vertexWeightAccessor) {
+        p.attributes.weight.push_back(vertexWeightAccessor);
     }
     delete[] jointsPerVertex;
     delete[] vertexWeightData;
     delete[] vertexJointData;
 }
 
-void glTF2Exporter::ExportMeshes()
-{
+void glTF2Exporter::ExportMeshes() {
     typedef decltype(aiFace::mNumIndices) IndicesType;
 
     std::string fname = std::string(mFilename);
@@ -985,15 +980,15 @@ void glTF2Exporter::ExportMeshes()
 
     Ref<Buffer> b = mAsset->GetBodyBuffer();
     if (!b) {
-       b = mAsset->buffers.Create(bufferId);
+        b = mAsset->buffers.Create(bufferId);
     }
 
     //----------------------------------------
     // Initialize variables for the skin
     bool createSkin = false;
     for (unsigned int idx_mesh = 0; idx_mesh < mScene->mNumMeshes; ++idx_mesh) {
-        const aiMesh* aim = mScene->mMeshes[idx_mesh];
-        if(aim->HasBones()) {
+        const aiMesh *aim = mScene->mMeshes[idx_mesh];
+        if (aim->HasBones()) {
             createSkin = true;
             break;
         }
@@ -1002,49 +997,49 @@ void glTF2Exporter::ExportMeshes()
     Ref<Skin> skinRef;
     std::string skinName = mAsset->FindUniqueID("skin", "skin");
     std::vector<aiMatrix4x4> inverseBindMatricesData;
-    if(createSkin) {
+    if (createSkin) {
         skinRef = mAsset->skins.Create(skinName);
         skinRef->name = skinName;
     }
     //----------------------------------------
 
-	for (unsigned int idx_mesh = 0; idx_mesh < mScene->mNumMeshes; ++idx_mesh) {
-		const aiMesh* aim = mScene->mMeshes[idx_mesh];
+    for (unsigned int idx_mesh = 0; idx_mesh < mScene->mNumMeshes; ++idx_mesh) {
+        const aiMesh *aim = mScene->mMeshes[idx_mesh];
 
         std::string name = aim->mName.C_Str();
 
         std::string meshId = mAsset->FindUniqueID(name, "mesh");
         Ref<Mesh> m = mAsset->meshes.Create(meshId);
         m->primitives.resize(1);
-        Mesh::Primitive& p = m->primitives.back();
+        Mesh::Primitive &p = m->primitives.back();
 
         m->name = name;
 
         p.material = mAsset->materials.Get(aim->mMaterialIndex);
         p.ngonEncoded = (aim->mPrimitiveTypes & aiPrimitiveType_NGONEncodingFlag) != 0;
 
-		/******************* Vertices ********************/
-		Ref<Accessor> v = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mVertices, AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-		if (v) p.attributes.position.push_back(v);
+        /******************* Vertices ********************/
+        Ref<Accessor> v = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mVertices, AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
+        if (v) p.attributes.position.push_back(v);
 
-		/******************** Normals ********************/
+        /******************** Normals ********************/
         // Normalize all normals as the validator can emit a warning otherwise
-        if ( nullptr != aim->mNormals) {
-            for ( auto i = 0u; i < aim->mNumVertices; ++i ) {
-                aim->mNormals[ i ].NormalizeSafe();
+        if (nullptr != aim->mNormals) {
+            for (auto i = 0u; i < aim->mNumVertices; ++i) {
+                aim->mNormals[i].NormalizeSafe();
             }
         }
 
-		Ref<Accessor> n = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mNormals, AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
+        Ref<Accessor> n = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mNormals, AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
         if (n) p.attributes.normal.push_back(n);
 
-		/************** Texture coordinates **************/
+        /************** Texture coordinates **************/
         for (int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-			if (!aim->HasTextureCoords(i))
-				continue;
+            if (!aim->HasTextureCoords(i))
+                continue;
 
             // Flip UV y coords
-            if (aim -> mNumUVComponents[i] > 1) {
+            if (aim->mNumUVComponents[i] > 1) {
                 for (unsigned int j = 0; j < aim->mNumVertices; ++j) {
                     aim->mTextureCoords[i][j].y = 1 - aim->mTextureCoords[i][j].y;
                 }
@@ -1053,45 +1048,48 @@ void glTF2Exporter::ExportMeshes()
             if (aim->mNumUVComponents[i] > 0) {
                 AttribType::Value type = (aim->mNumUVComponents[i] == 2) ? AttribType::VEC2 : AttribType::VEC3;
 
-				Ref<Accessor> tc = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mTextureCoords[i], AttribType::VEC3, type, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-				if (tc) p.attributes.texcoord.push_back(tc);
-			}
-		}
+                Ref<Accessor> tc = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mTextureCoords[i], AttribType::VEC3, type, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
+                if (tc) p.attributes.texcoord.push_back(tc);
+            }
+        }
 
-		/*************** Vertex colors ****************/
-		for (unsigned int indexColorChannel = 0; indexColorChannel < aim->GetNumColorChannels(); ++indexColorChannel) {
-			Ref<Accessor> c = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mColors[indexColorChannel], AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-			if (c)
-				p.attributes.color.push_back(c);
-		}
+        /*************** Vertex colors ****************/
+        for (unsigned int indexColorChannel = 0; indexColorChannel < aim->GetNumColorChannels(); ++indexColorChannel) {
+            Ref<Accessor> c = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mColors[indexColorChannel], AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
+            if (c)
+                p.attributes.color.push_back(c);
+        }
 
-		/*************** Vertices indices ****************/
-		if (aim->mNumFaces > 0) {
-			std::vector<IndicesType> indices;
-			unsigned int nIndicesPerFace = aim->mFaces[0].mNumIndices;
+        /*************** Vertices indices ****************/
+        if (aim->mNumFaces > 0) {
+            std::vector<IndicesType> indices;
+            unsigned int nIndicesPerFace = aim->mFaces[0].mNumIndices;
             indices.resize(aim->mNumFaces * nIndicesPerFace);
             for (size_t i = 0; i < aim->mNumFaces; ++i) {
                 for (size_t j = 0; j < nIndicesPerFace; ++j) {
-                    indices[i*nIndicesPerFace + j] = IndicesType(aim->mFaces[i].mIndices[j]);
+                    indices[i * nIndicesPerFace + j] = IndicesType(aim->mFaces[i].mIndices[j]);
                 }
             }
 
-			p.indices = ExportData(*mAsset, meshId, b, indices.size(), &indices[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_UNSIGNED_INT, BufferViewTarget_ELEMENT_ARRAY_BUFFER);
-		}
+            p.indices = ExportData(*mAsset, meshId, b, indices.size(), &indices[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_UNSIGNED_INT, BufferViewTarget_ELEMENT_ARRAY_BUFFER);
+        }
 
         switch (aim->mPrimitiveTypes) {
-            case aiPrimitiveType_POLYGON:
-                p.mode = PrimitiveMode_TRIANGLES; break; // TODO implement this
-            case aiPrimitiveType_LINE:
-                p.mode = PrimitiveMode_LINES; break;
-            case aiPrimitiveType_POINT:
-                p.mode = PrimitiveMode_POINTS; break;
-            default: // aiPrimitiveType_TRIANGLE
-                p.mode = PrimitiveMode_TRIANGLES;
+        case aiPrimitiveType_POLYGON:
+            p.mode = PrimitiveMode_TRIANGLES;
+            break; // TODO implement this
+        case aiPrimitiveType_LINE:
+            p.mode = PrimitiveMode_LINES;
+            break;
+        case aiPrimitiveType_POINT:
+            p.mode = PrimitiveMode_POINTS;
+            break;
+        default: // aiPrimitiveType_TRIANGLE
+            p.mode = PrimitiveMode_TRIANGLES;
         }
 
         /*************** Skins ****************/
-        if(aim->HasBones()) {
+        if (aim->HasBones()) {
             ExportSkin(*mAsset, aim, m, b, skinRef, inverseBindMatricesData);
         }
 
@@ -1102,7 +1100,7 @@ void glTF2Exporter::ExportMeshes()
             bool bIncludeNormal = this->mProperties->HasPropertyBool("GLTF2_TARGET_NORMAL_EXP") &&
                                   this->mProperties->GetPropertyBool("GLTF2_TARGET_NORMAL_EXP");
             bool bExportTargetNames = this->mProperties->HasPropertyBool("GLTF2_TARGETNAMES_EXP") &&
-                              this->mProperties->GetPropertyBool("GLTF2_TARGETNAMES_EXP");
+                                      this->mProperties->GetPropertyBool("GLTF2_TARGETNAMES_EXP");
 
             p.targets.resize(aim->mNumAnimMeshes);
             for (unsigned int am = 0; am < aim->mNumAnimMeshes; ++am) {
@@ -1164,14 +1162,14 @@ void glTF2Exporter::ExportMeshes()
     // Create the Accessor for skinRef->inverseBindMatrices
     bool bAddCustomizedProperty = this->mProperties->HasPropertyBool("GLTF2_CUSTOMIZE_PROPERTY");
     if (createSkin) {
-        mat4* invBindMatrixData = new mat4[inverseBindMatricesData.size()];
-        for ( unsigned int idx_joint = 0; idx_joint < inverseBindMatricesData.size(); ++idx_joint) {
+        mat4 *invBindMatrixData = new mat4[inverseBindMatricesData.size()];
+        for (unsigned int idx_joint = 0; idx_joint < inverseBindMatricesData.size(); ++idx_joint) {
             CopyValue(inverseBindMatricesData[idx_joint], invBindMatrixData[idx_joint]);
         }
 
         Ref<Accessor> invBindMatrixAccessor = ExportData(*mAsset, skinName, b,
                 static_cast<unsigned int>(inverseBindMatricesData.size()),
-            invBindMatrixData, AttribType::MAT4, AttribType::MAT4, ComponentType_FLOAT);
+                invBindMatrixData, AttribType::MAT4, AttribType::MAT4, ComponentType_FLOAT);
         if (invBindMatrixAccessor) {
             skinRef->inverseBindMatrices = invBindMatrixAccessor;
         }
@@ -1199,7 +1197,7 @@ void glTF2Exporter::ExportMeshes()
             std::string meshID = mesh->id;
             FindMeshNode(rootNode, meshNode, meshID);
             Ref<Node> rootJoint = FindSkeletonRootJoint(skinRef);
-            if(bAddCustomizedProperty)
+            if (bAddCustomizedProperty)
                 meshNode->skeletons.push_back(rootJoint);
             meshNode->skin = skinRef;
         }
@@ -1208,8 +1206,7 @@ void glTF2Exporter::ExportMeshes()
 }
 
 // Merges a node's multiple meshes (with one primitive each) into one mesh with multiple primitives
-void glTF2Exporter::MergeMeshes()
-{
+void glTF2Exporter::MergeMeshes() {
     for (unsigned int n = 0; n < mAsset->nodes.Size(); ++n) {
         Ref<Node> node = mAsset->nodes.Get(n);
 
@@ -1225,10 +1222,9 @@ void glTF2Exporter::MergeMeshes()
 
                 //append this mesh's primitives to the first mesh's primitives
                 firstMesh->primitives.insert(
-                    firstMesh->primitives.end(),
-                    mesh->primitives.begin(),
-                    mesh->primitives.end()
-                );
+                        firstMesh->primitives.end(),
+                        mesh->primitives.begin(),
+                        mesh->primitives.end());
 
                 //remove the mesh from the list of meshes
                 unsigned int removedIndex = mAsset->meshes.Remove(mesh->id.c_str());
@@ -1262,8 +1258,7 @@ void glTF2Exporter::MergeMeshes()
  * Export the root node of the node hierarchy.
  * Calls ExportNode for all children.
  */
-unsigned int glTF2Exporter::ExportNodeHierarchy(const aiNode* n)
-{
+unsigned int glTF2Exporter::ExportNodeHierarchy(const aiNode *n) {
     Ref<Node> node = mAsset->nodes.Create(mAsset->FindUniqueID(n->mName.C_Str(), "node"));
 
     node->name = n->mName.C_Str();
@@ -1289,8 +1284,7 @@ unsigned int glTF2Exporter::ExportNodeHierarchy(const aiNode* n)
  * Export node and recursively calls ExportNode for all children.
  * Since these nodes are not the root node, we also export the parent Ref<Node>
  */
-unsigned int glTF2Exporter::ExportNode(const aiNode* n, Ref<Node>& parent)
-{
+unsigned int glTF2Exporter::ExportNode(const aiNode *n, Ref<Node> &parent) {
     std::string name = mAsset->FindUniqueID(n->mName.C_Str(), "node");
     Ref<Node> node = mAsset->nodes.Create(name);
 
@@ -1298,27 +1292,27 @@ unsigned int glTF2Exporter::ExportNode(const aiNode* n, Ref<Node>& parent)
     node->name = name;
 
     if (!n->mTransformation.IsIdentity()) {
-		if (mScene->mNumAnimations > 0 || (mProperties && mProperties->HasPropertyBool("GLTF2_NODE_IN_TRS"))) {
-			aiQuaternion quaternion;
-			n->mTransformation.Decompose(*reinterpret_cast<aiVector3D *>(&node->scale.value), quaternion, *reinterpret_cast<aiVector3D *>(&node->translation.value));
+        if (mScene->mNumAnimations > 0 || (mProperties && mProperties->HasPropertyBool("GLTF2_NODE_IN_TRS"))) {
+            aiQuaternion quaternion;
+            n->mTransformation.Decompose(*reinterpret_cast<aiVector3D *>(&node->scale.value), quaternion, *reinterpret_cast<aiVector3D *>(&node->translation.value));
 
-			aiVector3D vector(static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f));
-			if (!reinterpret_cast<aiVector3D *>(&node->scale.value)->Equal(vector)) {
-				node->scale.isPresent = true;
-			}
-			if (!reinterpret_cast<aiVector3D *>(&node->translation.value)->Equal(vector)) {
-				node->translation.isPresent = true;
-			}
-			node->rotation.isPresent = true;
-			node->rotation.value[0] = quaternion.x;
-			node->rotation.value[1] = quaternion.y;
-			node->rotation.value[2] = quaternion.z;
-			node->rotation.value[3] = quaternion.w;
-			node->matrix.isPresent = false;
-		} else {
-			node->matrix.isPresent = true;
-			CopyValue(n->mTransformation, node->matrix.value);
-		}
+            aiVector3D vector(static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f));
+            if (!reinterpret_cast<aiVector3D *>(&node->scale.value)->Equal(vector)) {
+                node->scale.isPresent = true;
+            }
+            if (!reinterpret_cast<aiVector3D *>(&node->translation.value)->Equal(vector)) {
+                node->translation.isPresent = true;
+            }
+            node->rotation.isPresent = true;
+            node->rotation.value[0] = quaternion.x;
+            node->rotation.value[1] = quaternion.y;
+            node->rotation.value[2] = quaternion.z;
+            node->rotation.value[3] = quaternion.w;
+            node->matrix.isPresent = false;
+        } else {
+            node->matrix.isPresent = true;
+            CopyValue(n->mTransformation, node->matrix.value);
+        }
     }
 
     for (unsigned int i = 0; i < n->mNumMeshes; ++i) {
@@ -1333,9 +1327,7 @@ unsigned int glTF2Exporter::ExportNode(const aiNode* n, Ref<Node>& parent)
     return node.GetIndex();
 }
 
-
-void glTF2Exporter::ExportScene()
-{
+void glTF2Exporter::ExportScene() {
     // Use the name of the scene if specified
     const std::string sceneName = (mScene->mName.length > 0) ? mScene->mName.C_Str() : "defaultScene";
 
@@ -1351,37 +1343,34 @@ void glTF2Exporter::ExportScene()
     mAsset->scene = scene;
 }
 
-void glTF2Exporter::ExportMetadata()
-{
-    AssetMetadata& asset = mAsset->asset;
+void glTF2Exporter::ExportMetadata() {
+    AssetMetadata &asset = mAsset->asset;
     asset.version = "2.0";
 
     char buffer[256];
     ai_snprintf(buffer, 256, "Open Asset Import Library (assimp v%d.%d.%x)",
-        aiGetVersionMajor(), aiGetVersionMinor(), aiGetVersionRevision());
+            aiGetVersionMajor(), aiGetVersionMinor(), aiGetVersionRevision());
 
     asset.generator = buffer;
 
     // Copyright
-	aiString copyright_str;
-	if (mScene->mMetaData != nullptr && mScene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, copyright_str)) {
+    aiString copyright_str;
+    if (mScene->mMetaData != nullptr && mScene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, copyright_str)) {
         asset.copyright = copyright_str.C_Str();
-	}
+    }
 }
 
-inline Ref<Accessor> GetSamplerInputRef(Asset& asset, std::string& animId, Ref<Buffer>& buffer, std::vector<float>& times)
-{
+inline Ref<Accessor> GetSamplerInputRef(Asset &asset, std::string &animId, Ref<Buffer> &buffer, std::vector<float> &times) {
     return ExportData(asset, animId, buffer, (unsigned int)times.size(), &times[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_FLOAT);
 }
 
-inline void ExtractTranslationSampler(Asset& asset, std::string& animId, Ref<Buffer>& buffer, const aiNodeAnim* nodeChannel, float ticksPerSecond, Animation::Sampler& sampler)
-{
+inline void ExtractTranslationSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
     const unsigned int numKeyframes = nodeChannel->mNumPositionKeys;
 
     std::vector<float> times(numKeyframes);
     std::vector<float> values(numKeyframes * 3);
     for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiVectorKey& key = nodeChannel->mPositionKeys[i];
+        const aiVectorKey &key = nodeChannel->mPositionKeys[i];
         // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
         times[i] = static_cast<float>(key.mTime / ticksPerSecond);
         values[(i * 3) + 0] = key.mValue.x;
@@ -1394,14 +1383,13 @@ inline void ExtractTranslationSampler(Asset& asset, std::string& animId, Ref<Buf
     sampler.interpolation = Interpolation_LINEAR;
 }
 
-inline void ExtractScaleSampler(Asset& asset, std::string& animId, Ref<Buffer>& buffer, const aiNodeAnim* nodeChannel, float ticksPerSecond, Animation::Sampler& sampler)
-{
+inline void ExtractScaleSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
     const unsigned int numKeyframes = nodeChannel->mNumScalingKeys;
 
     std::vector<float> times(numKeyframes);
     std::vector<float> values(numKeyframes * 3);
     for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiVectorKey& key = nodeChannel->mScalingKeys[i];
+        const aiVectorKey &key = nodeChannel->mScalingKeys[i];
         // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
         times[i] = static_cast<float>(key.mTime / ticksPerSecond);
         values[(i * 3) + 0] = key.mValue.x;
@@ -1414,14 +1402,13 @@ inline void ExtractScaleSampler(Asset& asset, std::string& animId, Ref<Buffer>&
     sampler.interpolation = Interpolation_LINEAR;
 }
 
-inline void ExtractRotationSampler(Asset& asset, std::string& animId, Ref<Buffer>& buffer, const aiNodeAnim* nodeChannel, float ticksPerSecond, Animation::Sampler& sampler)
-{
+inline void ExtractRotationSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
     const unsigned int numKeyframes = nodeChannel->mNumRotationKeys;
 
     std::vector<float> times(numKeyframes);
     std::vector<float> values(numKeyframes * 4);
     for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiQuatKey& key = nodeChannel->mRotationKeys[i];
+        const aiQuatKey &key = nodeChannel->mRotationKeys[i];
         // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
         times[i] = static_cast<float>(key.mTime / ticksPerSecond);
         values[(i * 4) + 0] = key.mValue.x;
@@ -1435,22 +1422,20 @@ inline void ExtractRotationSampler(Asset& asset, std::string& animId, Ref<Buffer
     sampler.interpolation = Interpolation_LINEAR;
 }
 
-static void AddSampler(Ref<Animation>& animRef, Ref<Node>& nodeRef, Animation::Sampler& sampler, AnimationPath path)
-{
-      Animation::Channel channel;
-      channel.sampler = static_cast<int>(animRef->samplers.size());
-      channel.target.path = path;
-      channel.target.node = nodeRef;
-      animRef->channels.push_back(channel);
-      animRef->samplers.push_back(sampler);
+static void AddSampler(Ref<Animation> &animRef, Ref<Node> &nodeRef, Animation::Sampler &sampler, AnimationPath path) {
+    Animation::Channel channel;
+    channel.sampler = static_cast<int>(animRef->samplers.size());
+    channel.target.path = path;
+    channel.target.node = nodeRef;
+    animRef->channels.push_back(channel);
+    animRef->samplers.push_back(sampler);
 }
 
-void glTF2Exporter::ExportAnimations()
-{
-    Ref<Buffer> bufferRef = mAsset->buffers.Get(unsigned (0));
+void glTF2Exporter::ExportAnimations() {
+    Ref<Buffer> bufferRef = mAsset->buffers.Get(unsigned(0));
 
     for (unsigned int i = 0; i < mScene->mNumAnimations; ++i) {
-        const aiAnimation* anim = mScene->mAnimations[i];
+        const aiAnimation *anim = mScene->mAnimations[i];
         const float ticksPerSecond = static_cast<float>(anim->mTicksPerSecond);
 
         std::string nameAnim = "anim";
@@ -1461,29 +1446,26 @@ void glTF2Exporter::ExportAnimations()
         animRef->name = nameAnim;
 
         for (unsigned int channelIndex = 0; channelIndex < anim->mNumChannels; ++channelIndex) {
-            const aiNodeAnim* nodeChannel = anim->mChannels[channelIndex];
+            const aiNodeAnim *nodeChannel = anim->mChannels[channelIndex];
 
             std::string name = nameAnim + "_" + ai_to_string(channelIndex);
             name = mAsset->FindUniqueID(name, "animation");
 
             Ref<Node> animNode = mAsset->nodes.Get(nodeChannel->mNodeName.C_Str());
 
-            if (nodeChannel->mNumPositionKeys > 0)
-            {
+            if (nodeChannel->mNumPositionKeys > 0) {
                 Animation::Sampler translationSampler;
                 ExtractTranslationSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, translationSampler);
                 AddSampler(animRef, animNode, translationSampler, AnimationPath_TRANSLATION);
             }
 
-            if (nodeChannel->mNumRotationKeys > 0)
-            {
+            if (nodeChannel->mNumRotationKeys > 0) {
                 Animation::Sampler rotationSampler;
                 ExtractRotationSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, rotationSampler);
                 AddSampler(animRef, animNode, rotationSampler, AnimationPath_ROTATION);
             }
 
-            if (nodeChannel->mNumScalingKeys > 0)
-            {
+            if (nodeChannel->mNumScalingKeys > 0) {
                 Animation::Sampler scaleSampler;
                 ExtractScaleSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, scaleSampler);
                 AddSampler(animRef, animNode, scaleSampler, AnimationPath_SCALE);
@@ -1498,6 +1480,5 @@ void glTF2Exporter::ExportAnimations()
     } // End: for-loop mNumAnimations
 }
 
-
 #endif // ASSIMP_BUILD_NO_GLTF_EXPORTER
 #endif // ASSIMP_BUILD_NO_EXPORT
diff --git a/code/AssetLib/glTF2/glTF2Exporter.h b/code/AssetLib/glTF2/glTF2Exporter.h
index f5238297f..842d29815 100644
--- a/code/AssetLib/glTF2/glTF2Exporter.h
+++ b/code/AssetLib/glTF2/glTF2Exporter.h
@@ -4,7 +4,6 @@ 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,
@@ -48,93 +47,94 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 
-#include <assimp/types.h>
 #include <assimp/material.h>
+#include <assimp/types.h>
 
-#include <sstream>
-#include <vector>
 #include <map>
 #include <memory>
+#include <sstream>
+#include <vector>
 
 struct aiScene;
 struct aiNode;
 struct aiMaterial;
 
-namespace glTF2
-{
-    template<class T>
-    class Ref;
-
-    class Asset;
-    struct TexProperty;
-    struct TextureInfo;
-    struct NormalTextureInfo;
-    struct OcclusionTextureInfo;
-    struct Node;
-    struct Texture;
-    struct PbrSpecularGlossiness;
-    struct MaterialSheen;
-    struct MaterialClearcoat;
-    struct MaterialTransmission;
-
-    // Vec/matrix types, as raw float arrays
-	typedef float (vec2)[2];
-    typedef float (vec3)[3];
-    typedef float (vec4)[4];
-}
-
-namespace Assimp
-{
-    class IOSystem;
-    class IOStream;
-    class ExportProperties;
-
-    // ------------------------------------------------------------------------------------------------
-    /** Helper class to export a given scene to an glTF file. */
-    // ------------------------------------------------------------------------------------------------
-    class glTF2Exporter {
-    public:
-        /// Constructor for a specific scene to export
-        glTF2Exporter(const char* filename, IOSystem* pIOSystem, const aiScene* pScene,
-            const ExportProperties* pProperties, bool binary);
-        ~glTF2Exporter();
-
-    protected:
-        void WriteBinaryData(IOStream* outfile, std::size_t sceneLength);
-        void GetTexSampler(const aiMaterial& mat, glTF2::Ref<glTF2::Texture> texture, aiTextureType tt, unsigned int slot);
-        void GetMatTexProp(const aiMaterial& mat, unsigned int& prop, const char* propName, aiTextureType tt, unsigned int idx);
-        void GetMatTexProp(const aiMaterial& mat, float& prop, const char* propName, aiTextureType tt, unsigned int idx);
-        void GetMatTex(const aiMaterial& mat, glTF2::Ref<glTF2::Texture>& texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot);
-        void GetMatTex(const aiMaterial& mat, glTF2::TextureInfo& prop, aiTextureType tt, unsigned int slot);
-        void GetMatTex(const aiMaterial& mat, glTF2::NormalTextureInfo& prop, aiTextureType tt, unsigned int slot);
-        void GetMatTex(const aiMaterial& mat, glTF2::OcclusionTextureInfo& prop, aiTextureType tt, unsigned int slot);
-        aiReturn GetMatColor(const aiMaterial& mat, glTF2::vec4& prop, const char* propName, int type, int idx) const;
-        aiReturn GetMatColor(const aiMaterial& mat, glTF2::vec3& prop, const char* propName, int type, int idx) const;
-        bool GetMatSpecGloss(const aiMaterial& mat, glTF2::PbrSpecularGlossiness& pbrSG);
-        bool GetMatSheen(const aiMaterial& mat, glTF2::MaterialSheen& sheen);
-        bool GetMatClearcoat(const aiMaterial& mat, glTF2::MaterialClearcoat& clearcoat);
-        bool GetMatTransmission(const aiMaterial& mat, glTF2::MaterialTransmission& transmission);
-        void ExportMetadata();
-        void ExportMaterials();
-        void ExportMeshes();
-        void MergeMeshes();
-        unsigned int ExportNodeHierarchy(const aiNode* n);
-        unsigned int ExportNode(const aiNode* node, glTF2::Ref<glTF2::Node>& parent);
-        void ExportScene();
-        void ExportAnimations();
-
-    private:
-        const char* mFilename;
-        IOSystem* mIOSystem;
-        const aiScene* mScene;
-        const ExportProperties* mProperties;
-        std::map<std::string, unsigned int> mTexturesByPath;
-        std::shared_ptr<glTF2::Asset> mAsset;
-        std::vector<unsigned char> mBodyData;
-    };
+namespace glTFCommon {
+template <class T>
+class Ref;
 
 }
 
+namespace glTF2 {
+class Asset;
+struct TexProperty;
+struct TextureInfo;
+struct NormalTextureInfo;
+struct OcclusionTextureInfo;
+struct Node;
+struct Texture;
+struct PbrSpecularGlossiness;
+struct MaterialSheen;
+struct MaterialClearcoat;
+struct MaterialTransmission;
+
+// Vec/matrix types, as raw float arrays
+typedef float(vec2)[2];
+typedef float(vec3)[3];
+typedef float(vec4)[4];
+} // namespace glTF2
+
+namespace Assimp {
+class IOSystem;
+class IOStream;
+class ExportProperties;
+
+// ------------------------------------------------------------------------------------------------
+/** Helper class to export a given scene to an glTF file. */
+// ------------------------------------------------------------------------------------------------
+class glTF2Exporter {
+public:
+    /// Constructor for a specific scene to export
+    glTF2Exporter(const char *filename, IOSystem *pIOSystem, const aiScene *pScene,
+            const ExportProperties *pProperties, bool binary);
+    ~glTF2Exporter();
+
+protected:
+    void WriteBinaryData(IOStream *outfile, std::size_t sceneLength);
+    void GetTexSampler(const aiMaterial &mat, glTFCommon::Ref<glTF2::Texture> texture, aiTextureType tt, unsigned int slot);
+    void GetMatTexProp(const aiMaterial &mat, unsigned int &prop, const char *propName, aiTextureType tt, unsigned int idx);
+    void GetMatTexProp(const aiMaterial &mat, float &prop, const char *propName, aiTextureType tt, unsigned int idx);
+    void GetMatTex(const aiMaterial &mat, glTFCommon::Ref<glTF2::Texture> &texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot);
+    void GetMatTex(const aiMaterial &mat, glTF2::TextureInfo &prop, aiTextureType tt, unsigned int slot);
+    void GetMatTex(const aiMaterial &mat, glTF2::NormalTextureInfo &prop, aiTextureType tt, unsigned int slot);
+    void GetMatTex(const aiMaterial &mat, glTF2::OcclusionTextureInfo &prop, aiTextureType tt, unsigned int slot);
+    aiReturn GetMatColor(const aiMaterial &mat, glTF2::vec4 &prop, const char *propName, int type, int idx) const;
+    aiReturn GetMatColor(const aiMaterial &mat, glTF2::vec3 &prop, const char *propName, int type, int idx) const;
+    bool GetMatSpecGloss(const aiMaterial &mat, glTF2::PbrSpecularGlossiness &pbrSG);
+    bool GetMatSheen(const aiMaterial &mat, glTF2::MaterialSheen &sheen);
+    bool GetMatClearcoat(const aiMaterial &mat, glTF2::MaterialClearcoat &clearcoat);
+    bool GetMatTransmission(const aiMaterial &mat, glTF2::MaterialTransmission &transmission);
+    void ExportMetadata();
+    void ExportMaterials();
+    void ExportMeshes();
+    void MergeMeshes();
+    unsigned int ExportNodeHierarchy(const aiNode *n);
+    unsigned int ExportNode(const aiNode *node, glTFCommon::Ref<glTF2::Node> &parent);
+    void ExportScene();
+    void ExportAnimations();
+
+private:
+    const char *mFilename;
+    IOSystem *mIOSystem;
+    const aiScene *mScene;
+    const ExportProperties *mProperties;
+    std::map<std::string, unsigned int> mTexturesByPath;
+    std::shared_ptr<glTF2::Asset> mAsset;
+    std::vector<unsigned char> mBodyData;
+};
+
+} // namespace Assimp
+
 #endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
 
 #endif // AI_GLTF2EXPORTER_H_INC
diff --git a/code/AssetLib/glTF2/glTF2Importer.cpp b/code/AssetLib/glTF2/glTF2Importer.cpp
index ada7aa046..6c92bdc87 100644
--- a/code/AssetLib/glTF2/glTF2Importer.cpp
+++ b/code/AssetLib/glTF2/glTF2Importer.cpp
@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AssetLib/glTF2/glTF2Importer.h"
 #include "PostProcessing/MakeVerboseFormat.h"
 #include "AssetLib/glTF2/glTF2Asset.h"
+
 #if !defined(ASSIMP_BUILD_NO_EXPORT)
 #include "AssetLib/glTF2/glTF2AssetWriter.h"
 #endif
@@ -57,6 +58,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/Importer.hpp>
 #include <assimp/commonMetaData.h>
+#include <assimp/DefaultIOSystem.h>
 
 #include <memory>
 #include <unordered_map>
@@ -141,19 +143,23 @@ static aiTextureMapMode ConvertWrappingMode(SamplerWrap gltfWrapMode) {
     }
 }
 
-inline void SetMaterialColorProperty(Asset & /*r*/, vec4 &prop, aiMaterial *mat, const char *pKey, unsigned int type, unsigned int idx) {
+inline void SetMaterialColorProperty(Asset & /*r*/, vec4 &prop, aiMaterial *mat,
+        const char *pKey, unsigned int type, unsigned int idx) {
     aiColor4D col;
     CopyValue(prop, col);
     mat->AddProperty(&col, 1, pKey, type, idx);
 }
 
-inline void SetMaterialColorProperty(Asset & /*r*/, vec3 &prop, aiMaterial *mat, const char *pKey, unsigned int type, unsigned int idx) {
+inline void SetMaterialColorProperty(Asset & /*r*/, vec3 &prop, aiMaterial *mat,
+        const char *pKey, unsigned int type, unsigned int idx) {
     aiColor4D col;
     glTFCommon::CopyValue(prop, col);
     mat->AddProperty(&col, 1, pKey, type, idx);
 }
 
-inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset & /*r*/, glTF2::TextureInfo prop, aiMaterial *mat, aiTextureType texType, unsigned int texSlot = 0) {
+inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset & /*r*/,
+        glTF2::TextureInfo prop, aiMaterial *mat, aiTextureType texType,
+        unsigned int texSlot = 0) {
     if (prop.texture && prop.texture->source) {
         aiString uri(prop.texture->source->uri);
 
@@ -218,7 +224,9 @@ inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset
     }
 }
 
-inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r, glTF2::NormalTextureInfo &prop, aiMaterial *mat, aiTextureType texType, unsigned int texSlot = 0) {
+inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r,
+        NormalTextureInfo &prop, aiMaterial *mat, aiTextureType texType,
+        unsigned int texSlot = 0) {
     SetMaterialTextureProperty(embeddedTexIdxs, r, (glTF2::TextureInfo)prop, mat, texType, texSlot);
 
     if (prop.texture && prop.texture->source) {
@@ -226,7 +234,9 @@ inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset
     }
 }
 
-inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r, glTF2::OcclusionTextureInfo &prop, aiMaterial *mat, aiTextureType texType, unsigned int texSlot = 0) {
+inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r,
+        OcclusionTextureInfo &prop, aiMaterial *mat, aiTextureType texType,
+        unsigned int texSlot = 0) {
     SetMaterialTextureProperty(embeddedTexIdxs, r, (glTF2::TextureInfo)prop, mat, texType, texSlot);
 
     if (prop.texture && prop.texture->source) {
@@ -338,7 +348,7 @@ static aiMaterial *ImportMaterial(std::vector<int> &embeddedTexIdxs, Asset &r, M
     }
 }
 
-void glTF2Importer::ImportMaterials(glTF2::Asset &r) {
+void glTF2Importer::ImportMaterials(Asset &r) {
     const unsigned int numImportedMaterials = unsigned(r.materials.Size());
     ASSIMP_LOG_DEBUG("Importing ", numImportedMaterials, " materials");
     Material defaultMaterial;
@@ -363,7 +373,8 @@ static inline void SetFaceAndAdvance1(aiFace*& face, unsigned int numVertices, u
     ++face;
 }
 
-static inline void SetFaceAndAdvance2(aiFace*& face, unsigned int numVertices, unsigned int a, unsigned int b) {
+static inline void SetFaceAndAdvance2(aiFace*& face, unsigned int numVertices,
+        unsigned int a, unsigned int b) {
     if ((a >= numVertices) || (b >= numVertices)) {
         return;
     }
@@ -374,7 +385,8 @@ static inline void SetFaceAndAdvance2(aiFace*& face, unsigned int numVertices, u
     ++face;
 }
 
-static inline void SetFaceAndAdvance3(aiFace*& face, unsigned int numVertices, unsigned int a, unsigned int b, unsigned int c) {
+static inline void SetFaceAndAdvance3(aiFace*& face, unsigned int numVertices, unsigned int a,
+        unsigned int b, unsigned int c) {
     if ((a >= numVertices) || (b >= numVertices) || (c >= numVertices)) {
         return;
     }
@@ -401,8 +413,8 @@ static inline bool CheckValidFacesIndices(aiFace *faces, unsigned nFaces, unsign
 #endif // ASSIMP_BUILD_DEBUG
 
 template<typename T>
-aiColor4D* GetVertexColorsForType(glTF2::Ref<glTF2::Accessor> input) {
-    float max = std::numeric_limits<T>::max();
+aiColor4D* GetVertexColorsForType(Ref<Accessor> input) {
+    constexpr float max = std::numeric_limits<T>::max();
     aiColor4t<T>* colors;
     input->ExtractData(colors);
     auto output = new aiColor4D[input->count];
@@ -463,19 +475,19 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
 
             Mesh::Primitive::Attributes &attr = prim.attributes;
 
-            if (attr.position.size() > 0 && attr.position[0]) {
+            if (!attr.position.empty() && attr.position[0]) {
                 aim->mNumVertices = static_cast<unsigned int>(attr.position[0]->count);
                 attr.position[0]->ExtractData(aim->mVertices);
             }
 
-            if (attr.normal.size() > 0 && attr.normal[0]) {
+            if (!attr.normal.empty() && attr.normal[0]) {
                 if (attr.normal[0]->count != aim->mNumVertices) {
                     DefaultLogger::get()->warn("Normal count in mesh \"", mesh.name, "\" does not match the vertex count, normals ignored.");
                 } else {
                     attr.normal[0]->ExtractData(aim->mNormals);
 
                     // only extract tangents if normals are present
-                    if (attr.tangent.size() > 0 && attr.tangent[0]) {
+                    if (!attr.tangent.empty() && attr.tangent[0]) {
                         if (attr.tangent[0]->count != aim->mNumVertices) {
                             DefaultLogger::get()->warn("Tangent count in mesh \"", mesh.name, "\" does not match the vertex count, tangents ignored.");
                         } else {
@@ -538,7 +550,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
             }
 
             std::vector<Mesh::Primitive::Target> &targets = prim.targets;
-            if (targets.size() > 0) {
+            if (!targets.empty()) {
                 aim->mNumAnimMeshes = (unsigned int)targets.size();
                 aim->mAnimMeshes = new aiAnimMesh *[aim->mNumAnimMeshes];
                 std::fill(aim->mAnimMeshes, aim->mAnimMeshes + aim->mNumAnimMeshes, nullptr);
@@ -797,7 +809,9 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
 }
 
 void glTF2Importer::ImportCameras(glTF2::Asset &r) {
-    if (!r.cameras.Size()) return;
+    if (!r.cameras.Size()) {
+        return;
+    }
 
     const unsigned int numCameras = r.cameras.Size();
     ASSIMP_LOG_DEBUG("Importing ", numCameras, " cameras");
@@ -897,28 +911,29 @@ void glTF2Importer::ImportLights(glTF2::Asset &r) {
 static void GetNodeTransform(aiMatrix4x4 &matrix, const glTF2::Node &node) {
     if (node.matrix.isPresent) {
         CopyValue(node.matrix.value, matrix);
-    } else {
-        if (node.translation.isPresent) {
-            aiVector3D trans;
-            CopyValue(node.translation.value, trans);
-            aiMatrix4x4 t;
-            aiMatrix4x4::Translation(trans, t);
-            matrix = matrix * t;
-        }
+        return;
+    } 
 
-        if (node.rotation.isPresent) {
-            aiQuaternion rot;
-            CopyValue(node.rotation.value, rot);
-            matrix = matrix * aiMatrix4x4(rot.GetMatrix());
-        }
+    if (node.translation.isPresent) {
+        aiVector3D trans;
+        CopyValue(node.translation.value, trans);
+        aiMatrix4x4 t;
+        aiMatrix4x4::Translation(trans, t);
+        matrix = matrix * t;
+    }
 
-        if (node.scale.isPresent) {
-            aiVector3D scal(1.f);
-            CopyValue(node.scale.value, scal);
-            aiMatrix4x4 s;
-            aiMatrix4x4::Scaling(scal, s);
-            matrix = matrix * s;
-        }
+    if (node.rotation.isPresent) {
+        aiQuaternion rot;
+        CopyValue(node.rotation.value, rot);
+        matrix = matrix * aiMatrix4x4(rot.GetMatrix());
+    }
+
+    if (node.scale.isPresent) {
+        aiVector3D scal(1.f);
+        CopyValue(node.scale.value, scal);
+        aiMatrix4x4 s;
+        aiMatrix4x4::Scaling(scal, s);
+        matrix = matrix * s;
     }
 }
 
@@ -981,21 +996,21 @@ static std::string GetNodeName(const Node &node) {
 
 void ParseExtensions(aiMetadata *metadata, const CustomExtension &extension) {
     if (extension.mStringValue.isPresent) {
-        metadata->Add(extension.name.c_str(), aiString(extension.mStringValue.value));
+        metadata->Add(extension.name, aiString(extension.mStringValue.value));
     } else if (extension.mDoubleValue.isPresent) {
-        metadata->Add(extension.name.c_str(), extension.mDoubleValue.value);
+        metadata->Add(extension.name, extension.mDoubleValue.value);
     } else if (extension.mUint64Value.isPresent) {
-        metadata->Add(extension.name.c_str(), extension.mUint64Value.value);
+        metadata->Add(extension.name, extension.mUint64Value.value);
     } else if (extension.mInt64Value.isPresent) {
-        metadata->Add(extension.name.c_str(), static_cast<int32_t>(extension.mInt64Value.value));
+        metadata->Add(extension.name, static_cast<int32_t>(extension.mInt64Value.value));
     } else if (extension.mBoolValue.isPresent) {
-        metadata->Add(extension.name.c_str(), extension.mBoolValue.value);
+        metadata->Add(extension.name, extension.mBoolValue.value);
     } else if (extension.mValues.isPresent) {
         aiMetadata val;
         for (auto const & subExtension : extension.mValues.value) {
             ParseExtensions(&val, subExtension);
         }
-        metadata->Add(extension.name.c_str(), val);
+        metadata->Add(extension.name, val);
     }
 }
 
@@ -1041,7 +1056,9 @@ aiNode *ImportNode(aiScene *pScene, glTF2::Asset &r, std::vector<unsigned int> &
             // GLTF files contain at most 1 mesh per node.
             if (node.meshes.size() > 1)
             {
-                throw DeadlyImportError("GLTF: Invalid input, found ", node.meshes.size(), " meshes in ", getContextForErrorMessages(node.id, node.name), ", but only 1 mesh per node allowed.");
+                throw DeadlyImportError("GLTF: Invalid input, found ", node.meshes.size(),
+                    " meshes in ", getContextForErrorMessages(node.id, node.name),
+                    ", but only 1 mesh per node allowed.");
             }
             int mesh_idx = node.meshes[0].GetIndex();
             int count = meshOffsets[mesh_idx + 1] - meshOffsets[mesh_idx];
@@ -1284,7 +1301,7 @@ aiNodeAnim *CreateNodeAnim(glTF2::Asset&, Node &node, AnimationSamplers &sampler
 }
 
 aiMeshMorphAnim *CreateMeshMorphAnim(glTF2::Asset&, Node &node, AnimationSamplers &samplers) {
-    aiMeshMorphAnim *anim = new aiMeshMorphAnim();
+    auto *anim = new aiMeshMorphAnim();
 
     try {
         anim->mName = GetNodeName(node);
@@ -1432,7 +1449,7 @@ void glTF2Importer::ImportAnimations(glTF2::Asset &r) {
             }
         }
 
-        // Use the latest keyframe for the duration of the animation
+        // Use the latest key-frame for the duration of the animation
         double maxDuration = 0;
         unsigned int maxNumberOfKeys = 0;
         for (unsigned int j = 0; j < ai_anim->mNumChannels; ++j) {
@@ -1521,11 +1538,9 @@ void glTF2Importer::ImportEmbeddedTextures(glTF2::Asset &r) {
             if (ext) {
                 if (strcmp(ext, "jpeg") == 0) {
                     ext = "jpg";
-                }
-                else if(strcmp(ext, "ktx2") == 0) { //basisu: ktx remains
+                } else if(strcmp(ext, "ktx2") == 0) { //basisu: ktx remains
                     ext = "kx2";
-                }
-                else if(strcmp(ext, "basis") == 0) { //basisu
+                } else if(strcmp(ext, "basis") == 0) { //basisu
                     ext = "bu";
                 }
 
@@ -1563,7 +1578,6 @@ void glTF2Importer::ImportCommonMetadata(glTF2::Asset& a) {
 }
 
 void glTF2Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
-
     ASSIMP_LOG_DEBUG("Reading GLTF2 file");
 
     // clean all member arrays
@@ -1579,10 +1593,7 @@ void glTF2Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IO
         pScene->mName = asset.scene->name;
     }
 
-    //
     // Copy the data out
-    //
-
     ImportEmbeddedTextures(asset);
     ImportMaterials(asset);
 
diff --git a/code/AssetLib/glTF2/glTF2Importer.h b/code/AssetLib/glTF2/glTF2Importer.h
index 64183bd14..e586dc6cc 100644
--- a/code/AssetLib/glTF2/glTF2Importer.h
+++ b/code/AssetLib/glTF2/glTF2Importer.h
@@ -43,13 +43,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define AI_GLTF2IMPORTER_H_INC
 
 #include <assimp/BaseImporter.h>
-#include <assimp/DefaultIOSystem.h>
 
 struct aiNode;
 
-
-namespace glTF2
-{
+namespace glTF2 {
     class Asset;
 }
 
@@ -59,35 +56,32 @@ namespace Assimp {
  * Load the glTF2 format.
  * https://github.com/KhronosGroup/glTF/tree/master/specification
  */
-class glTF2Importer : public BaseImporter{
+class glTF2Importer : public BaseImporter {
 public:
     glTF2Importer();
-    virtual ~glTF2Importer();
-    virtual bool CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig ) const;
+    ~glTF2Importer() override;
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
 
 protected:
-    virtual const aiImporterDesc* GetInfo() const;
-    virtual void InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler );
+    const aiImporterDesc *GetInfo() const override;
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
 
 private:
+    void ImportEmbeddedTextures(glTF2::Asset &a);
+    void ImportMaterials(glTF2::Asset &a);
+    void ImportMeshes(glTF2::Asset &a);
+    void ImportCameras(glTF2::Asset &a);
+    void ImportLights(glTF2::Asset &a);
+    void ImportNodes(glTF2::Asset &a);
+    void ImportAnimations(glTF2::Asset &a);
+    void ImportCommonMetadata(glTF2::Asset &a);
 
+private:
     std::vector<unsigned int> meshOffsets;
-
     std::vector<int> embeddedTexIdxs;
-
-    aiScene* mScene;
-
-    void ImportEmbeddedTextures(glTF2::Asset& a);
-    void ImportMaterials(glTF2::Asset& a);
-    void ImportMeshes(glTF2::Asset& a);
-    void ImportCameras(glTF2::Asset& a);
-    void ImportLights(glTF2::Asset& a);
-    void ImportNodes(glTF2::Asset& a);
-    void ImportAnimations(glTF2::Asset& a);
-    void ImportCommonMetadata(glTF2::Asset& a);
+    aiScene *mScene;
 };
 
-} // Namespace assimp
+} // namespace Assimp
 
 #endif // AI_GLTF2IMPORTER_H_INC
-
diff --git a/code/CApi/CInterfaceIOWrapper.cpp b/code/CApi/CInterfaceIOWrapper.cpp
index 8e2ac95c0..245f3bc7a 100644
--- a/code/CApi/CInterfaceIOWrapper.cpp
+++ b/code/CApi/CInterfaceIOWrapper.cpp
@@ -51,7 +51,6 @@ CIOStreamWrapper::~CIOStreamWrapper() {
     /* Various places depend on this destructor to close the file */
     if (mFile) {
         mIO->mFileSystem->CloseProc(mIO->mFileSystem, mFile);
-        mFile = nullptr;
     }
 }
 
diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 130ab8870..d7871526a 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -69,7 +69,6 @@ SET( PUBLIC_HEADERS
   ${HEADER_PATH}/ColladaMetaData.h
   ${HEADER_PATH}/commonMetaData.h
   ${HEADER_PATH}/defs.h
-  ${HEADER_PATH}/Defines.h
   ${HEADER_PATH}/cfileio.h
   ${HEADER_PATH}/light.h
   ${HEADER_PATH}/material.h
diff --git a/code/Common/Bitmap.cpp b/code/Common/Bitmap.cpp
index 23b96d42d..51f31625e 100644
--- a/code/Common/Bitmap.cpp
+++ b/code/Common/Bitmap.cpp
@@ -5,8 +5,6 @@ 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,
@@ -54,33 +52,36 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace Assimp {
 
-void Bitmap::Save(aiTexture *texture, IOStream *file) {
-    if (file != nullptr) {
-        Header header;
-        DIB dib;
-
-        dib.size = DIB::dib_size;
-        dib.width = texture->mWidth;
-        dib.height = texture->mHeight;
-        dib.planes = 1;
-        dib.bits_per_pixel = 8 * mBytesPerPixel;
-        dib.compression = 0;
-        dib.image_size = (((dib.width * mBytesPerPixel) + 3) & 0x0000FFFC) * dib.height;
-        dib.x_resolution = 0;
-        dib.y_resolution = 0;
-        dib.nb_colors = 0;
-        dib.nb_important_colors = 0;
-
-        header.type = 0x4D42; // 'BM'
-        header.offset = Header::header_size + DIB::dib_size;
-        header.size = header.offset + dib.image_size;
-        header.reserved1 = 0;
-        header.reserved2 = 0;
-
-        WriteHeader(header, file);
-        WriteDIB(dib, file);
-        WriteData(texture, file);
+bool Bitmap::Save(aiTexture *texture, IOStream *file) {
+    if (file == nullptr) {
+        return false;
     }
+
+    Header header;
+    DIB dib;
+    dib.size = DIB::dib_size;
+    dib.width = texture->mWidth;
+    dib.height = texture->mHeight;
+    dib.planes = 1;
+    dib.bits_per_pixel = 8 * mBytesPerPixel;
+    dib.compression = 0;
+    dib.image_size = (((dib.width * mBytesPerPixel) + 3) & 0x0000FFFC) * dib.height;
+    dib.x_resolution = 0;
+    dib.y_resolution = 0;
+    dib.nb_colors = 0;
+    dib.nb_important_colors = 0;
+
+    header.type = 0x4D42; // 'BM'
+    header.offset = Header::header_size + DIB::dib_size;
+    header.size = header.offset + dib.image_size;
+    header.reserved1 = 0;
+    header.reserved2 = 0;
+
+    WriteHeader(header, file);
+    WriteDIB(dib, file);
+    WriteData(texture, file);
+
+    return true;
 }
 
 template <typename T>
diff --git a/code/Common/DefaultIOStream.cpp b/code/Common/DefaultIOStream.cpp
index 557fbc78f..e18dcd3f5 100644
--- a/code/Common/DefaultIOStream.cpp
+++ b/code/Common/DefaultIOStream.cpp
@@ -82,7 +82,6 @@ inline int select_fseek<8>(FILE *file, int64_t offset, int origin) {
 DefaultIOStream::~DefaultIOStream() {
     if (mFile) {
         ::fclose(mFile);
-        mFile = nullptr;
     }
 }
 
diff --git a/code/Common/StandardShapes.cpp b/code/Common/StandardShapes.cpp
index d9676f198..64ceeffc8 100644
--- a/code/Common/StandardShapes.cpp
+++ b/code/Common/StandardShapes.cpp
@@ -47,7 +47,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include <assimp/StandardShapes.h>
-#include <assimp/Defines.h>
 #include <assimp/StringComparison.h>
 #include <assimp/mesh.h>
 
diff --git a/code/Common/ZipArchiveIOSystem.cpp b/code/Common/ZipArchiveIOSystem.cpp
index 1f46ab0a9..7df51b8aa 100644
--- a/code/Common/ZipArchiveIOSystem.cpp
+++ b/code/Common/ZipArchiveIOSystem.cpp
@@ -352,7 +352,6 @@ ZipArchiveIOSystem::Implement::Implement(IOSystem *pIOHandler, const char *pFile
 ZipArchiveIOSystem::Implement::~Implement() {
     if (m_ZipFileHandle != nullptr) {
         unzClose(m_ZipFileHandle);
-        m_ZipFileHandle = nullptr;
     }
 }
 
diff --git a/include/assimp/Bitmap.h b/include/assimp/Bitmap.h
index e4ce194d9..228f6e9ba 100644
--- a/include/assimp/Bitmap.h
+++ b/include/assimp/Bitmap.h
@@ -5,8 +5,6 @@ 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,
@@ -55,7 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #endif
 
 #include "defs.h"
-#include <stdint.h>
+#include <cstdint>
 #include <cstddef>
 
 struct aiTexture;
@@ -64,6 +62,10 @@ namespace Assimp {
 
 class IOStream;
 
+// ---------------------------------------------------------------------------
+/** 
+ *  This class is used to store and write bitmap information.
+ */
 class ASSIMP_API Bitmap {
 protected:
 
@@ -114,7 +116,11 @@ protected:
     static constexpr std::size_t mBytesPerPixel = 4;
 
 public:
-    static void Save(aiTexture* texture, IOStream* file);
+    /// @brief  Will save an aiTexture instance as a bitmap.
+    /// @param texture  The pointer to the texture instance
+    /// @param file     The filename to save into.
+    /// @return true if successfully saved, false if not.
+    static bool Save(aiTexture* texture, IOStream* file);
 
 protected:
     static void WriteHeader(Header& header, IOStream* file);
diff --git a/include/assimp/BlobIOSystem.h b/include/assimp/BlobIOSystem.h
index 0abf166bc..da220b690 100644
--- a/include/assimp/BlobIOSystem.h
+++ b/include/assimp/BlobIOSystem.h
@@ -5,8 +5,6 @@ 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,
@@ -44,14 +42,19 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file Provides cheat implementations for IOSystem and IOStream to
  *  redirect exporter output to a blob chain.*/
 
+#pragma once
 #ifndef AI_BLOBIOSYSTEM_H_INCLUDED
 #define AI_BLOBIOSYSTEM_H_INCLUDED
 
+#ifdef __GNUC__
+#pragma GCC system_header
+#endif
+
 #include <assimp/cexport.h>
-#include <stdint.h>
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/IOStream.hpp>
 #include <assimp/IOSystem.hpp>
+#include <cstdint>
 #include <set>
 #include <vector>
 
@@ -63,6 +66,10 @@ class BlobIOSystem;
 // --------------------------------------------------------------------------------------------
 class BlobIOStream : public IOStream {
 public:
+    /// @brief The class constructor with all needed parameters
+    /// @param creator  Pointer to the creator instance
+    /// @param file     The filename
+    /// @param initial  The initial size
     BlobIOStream(BlobIOSystem *creator, const std::string &file, size_t initial = 4096) :
             buffer(),
             cur_size(),
@@ -74,7 +81,8 @@ public:
         // empty
     }
 
-    virtual ~BlobIOStream();
+    ///	@brief  The class destructor.
+    ~BlobIOStream() override;
 
 public:
     // -------------------------------------------------------------------
@@ -89,16 +97,12 @@ public:
     }
 
     // -------------------------------------------------------------------
-    virtual size_t Read(void *,
-            size_t,
-            size_t) {
+    size_t Read(void *, size_t, size_t) override {
         return 0;
     }
 
     // -------------------------------------------------------------------
-    virtual size_t Write(const void *pvBuffer,
-            size_t pSize,
-            size_t pCount) {
+    size_t Write(const void *pvBuffer, size_t pSize, size_t pCount) override {
         pSize *= pCount;
         if (cursor + pSize > cur_size) {
             Grow(cursor + pSize);
@@ -112,23 +116,22 @@ public:
     }
 
     // -------------------------------------------------------------------
-    virtual aiReturn Seek(size_t pOffset,
-            aiOrigin pOrigin) {
+    aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override {
         switch (pOrigin) {
-        case aiOrigin_CUR:
-            cursor += pOffset;
-            break;
+            case aiOrigin_CUR:
+                cursor += pOffset;
+                break;
 
-        case aiOrigin_END:
-            cursor = file_size - pOffset;
-            break;
+            case aiOrigin_END:
+                cursor = file_size - pOffset;
+                break;
 
-        case aiOrigin_SET:
-            cursor = pOffset;
-            break;
+            case aiOrigin_SET:
+                cursor = pOffset;
+                break;
 
-        default:
-            return AI_FAILURE;
+            default:
+                return AI_FAILURE;
         }
 
         if (cursor > file_size) {
@@ -136,21 +139,22 @@ public:
         }
 
         file_size = std::max(cursor, file_size);
+
         return AI_SUCCESS;
     }
 
     // -------------------------------------------------------------------
-    virtual size_t Tell() const {
+    size_t Tell() const override {
         return cursor;
     }
 
     // -------------------------------------------------------------------
-    virtual size_t FileSize() const {
+    size_t FileSize() const override {
         return file_size;
     }
 
     // -------------------------------------------------------------------
-    virtual void Flush() {
+    void Flush() override {
         // ignore
     }
 
@@ -196,15 +200,19 @@ class BlobIOSystem : public IOSystem {
 
 
 public:
+    /// @brief The default class constructor.
     BlobIOSystem() :
             baseName{AI_BLOBIO_MAGIC} {
     }
 
+    ///	@brief  The class constructor with the base name.
+    /// @param baseName     The base name.
     BlobIOSystem(const std::string &baseName) :
             baseName(baseName) {
+        // empty
     }
 
-    virtual ~BlobIOSystem() {
+    ~BlobIOSystem() override {
         for (BlobEntry &blobby : blobs) {
             delete blobby.second;
         }
@@ -263,18 +271,17 @@ public:
 
 public:
     // -------------------------------------------------------------------
-    virtual bool Exists(const char *pFile) const {
+    bool Exists(const char *pFile) const override {
         return created.find(std::string(pFile)) != created.end();
     }
 
     // -------------------------------------------------------------------
-    virtual char getOsSeparator() const {
+    char getOsSeparator() const override {
         return '/';
     }
 
     // -------------------------------------------------------------------
-    virtual IOStream *Open(const char *pFile,
-            const char *pMode) {
+    IOStream *Open(const char *pFile, const char *pMode) override {
         if (pMode[0] != 'w') {
             return nullptr;
         }
@@ -284,7 +291,7 @@ public:
     }
 
     // -------------------------------------------------------------------
-    virtual void Close(IOStream *pFile) {
+    void Close(IOStream *pFile) override {
         delete pFile;
     }
 
@@ -294,7 +301,7 @@ private:
         // we don't know in which the files are closed, so we
         // can't reliably say that the first must be the master
         // file ...
-        blobs.push_back(BlobEntry(filename, child->GetBlob()));
+        blobs.emplace_back(filename, child->GetBlob());
     }
 
 private:
@@ -304,8 +311,10 @@ private:
 };
 
 // --------------------------------------------------------------------------------------------
-BlobIOStream ::~BlobIOStream() {
-    creator->OnDestruct(file, this);
+BlobIOStream::~BlobIOStream() {
+    if (nullptr != creator) {
+        creator->OnDestruct(file, this);
+    }
     delete[] buffer;
 }
 
diff --git a/include/assimp/ByteSwapper.h b/include/assimp/ByteSwapper.h
index 98fdafc98..9e1eea10f 100644
--- a/include/assimp/ByteSwapper.h
+++ b/include/assimp/ByteSwapper.h
@@ -52,10 +52,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/ai_assert.h>
 #include <assimp/types.h>
-#include <stdint.h>
+#include <cstdint>
 
 #if _MSC_VER >= 1400
-#include <stdlib.h>
+#include <cstdlib>
 #endif
 
 namespace Assimp    {
diff --git a/include/assimp/ColladaMetaData.h b/include/assimp/ColladaMetaData.h
index 602f342f9..de5963b39 100644
--- a/include/assimp/ColladaMetaData.h
+++ b/include/assimp/ColladaMetaData.h
@@ -4,7 +4,6 @@ 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,
@@ -47,6 +46,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_COLLADAMETADATA_H_INC
 #define AI_COLLADAMETADATA_H_INC
 
+#ifdef __GNUC__
+#pragma GCC system_header
+#endif
+
 #define AI_METADATA_COLLADA_ID "Collada_id"
 #define AI_METADATA_COLLADA_SID "Collada_sid"
 
diff --git a/include/assimp/CreateAnimMesh.h b/include/assimp/CreateAnimMesh.h
index dda4dc63a..868a1f399 100644
--- a/include/assimp/CreateAnimMesh.h
+++ b/include/assimp/CreateAnimMesh.h
@@ -4,7 +4,6 @@ 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,
diff --git a/include/assimp/DefaultIOStream.h b/include/assimp/DefaultIOStream.h
index 6d0e13149..9e0a48623 100644
--- a/include/assimp/DefaultIOStream.h
+++ b/include/assimp/DefaultIOStream.h
@@ -4,7 +4,6 @@ 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,
@@ -40,7 +39,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-/** @file Default file I/O using fXXX()-family of functions */
+/**
+ *  @file
+ *  @brief Default file I/O using fXXX()-family of functions
+ */
 #pragma once
 #ifndef AI_DEFAULTIOSTREAM_H_INC
 #define AI_DEFAULTIOSTREAM_H_INC
@@ -49,10 +51,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #   pragma GCC system_header
 #endif
 
-#include <stdio.h>
+#include <cstdio>
 #include <assimp/IOStream.hpp>
 #include <assimp/importerdesc.h>
-#include <assimp/Defines.h>
 
 namespace Assimp {
 
@@ -73,7 +74,12 @@ class ASSIMP_API DefaultIOStream : public IOStream {
 #endif // __ANDROID__
 
 protected:
+    /// @brief 
     DefaultIOStream() AI_NO_EXCEPT;
+
+    /// @brief The class constructor with the file name and the stream.
+    /// @param pFile        The file-streaam
+    /// @param strFilename  The file name
     DefaultIOStream(FILE* pFile, const std::string &strFilename);
 
 public:
@@ -82,32 +88,27 @@ public:
 
     // -------------------------------------------------------------------
     /// Read from stream
-    size_t Read(void* pvBuffer,
-        size_t pSize,
-        size_t pCount);
+    size_t Read(void* pvBuffer, size_t pSize, size_t pCount) override;
 
     // -------------------------------------------------------------------
     /// Write to stream
-    size_t Write(const void* pvBuffer,
-        size_t pSize,
-        size_t pCount);
+    size_t Write(const void* pvBuffer, size_t pSize, size_t pCount) override;
 
     // -------------------------------------------------------------------
     /// Seek specific position
-    aiReturn Seek(size_t pOffset,
-        aiOrigin pOrigin);
+    aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override;
 
     // -------------------------------------------------------------------
     /// Get current seek position
-    size_t Tell() const;
+    size_t Tell() const override;
 
     // -------------------------------------------------------------------
     /// Get size of file
-    size_t FileSize() const;
+    size_t FileSize() const override;
 
     // -------------------------------------------------------------------
     /// Flush file contents
-    void Flush();
+    void Flush() override;
 
 private:
     FILE* mFile;
@@ -116,22 +117,21 @@ private:
 };
 
 // ----------------------------------------------------------------------------------
-AI_FORCE_INLINE
-DefaultIOStream::DefaultIOStream() AI_NO_EXCEPT
-: mFile(nullptr)
-, mFilename()
-, mCachedSize(SIZE_MAX) {
+AI_FORCE_INLINE DefaultIOStream::DefaultIOStream() AI_NO_EXCEPT :
+        mFile(nullptr),
+        mFilename(),
+        mCachedSize(SIZE_MAX) {
     // empty
 }
 
 // ----------------------------------------------------------------------------------
-AI_FORCE_INLINE
-DefaultIOStream::DefaultIOStream (FILE* pFile, const std::string &strFilename)
-: mFile(pFile)
-, mFilename(strFilename)
-, mCachedSize(SIZE_MAX) {
+AI_FORCE_INLINE DefaultIOStream::DefaultIOStream (FILE* pFile, const std::string &strFilename) :
+        mFile(pFile),
+        mFilename(strFilename),
+        mCachedSize(SIZE_MAX) {
     // empty
 }
+
 // ----------------------------------------------------------------------------------
 
 } // ns assimp
diff --git a/include/assimp/DefaultIOSystem.h b/include/assimp/DefaultIOSystem.h
index 3f7235f5b..2e5d0aac0 100644
--- a/include/assimp/DefaultIOSystem.h
+++ b/include/assimp/DefaultIOSystem.h
@@ -4,7 +4,6 @@ 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,
@@ -40,7 +39,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-/** @file Default implementation of IOSystem using the standard C file functions */
+/**
+ *  @file Default implementation of IOSystem using the standard C file functions
+ */
 #pragma once
 #ifndef AI_DEFAULTIOSYSTEM_H_INC
 #define AI_DEFAULTIOSYSTEM_H_INC
@@ -59,23 +60,23 @@ class ASSIMP_API DefaultIOSystem : public IOSystem {
 public:
     // -------------------------------------------------------------------
     /** Tests for the existence of a file at the given path. */
-    bool Exists( const char* pFile) const;
+    bool Exists( const char* pFile) const override;
 
     // -------------------------------------------------------------------
     /** Returns the directory separator. */
-    char getOsSeparator() const;
+    char getOsSeparator() const override;
 
     // -------------------------------------------------------------------
     /** Open a new file with a given path. */
-    IOStream* Open( const char* pFile, const char* pMode = "rb");
+    IOStream* Open( const char* pFile, const char* pMode = "rb") override;
 
     // -------------------------------------------------------------------
     /** Closes the given file and releases all resources associated with it. */
-    void Close( IOStream* pFile);
+    void Close( IOStream* pFile) override;
 
     // -------------------------------------------------------------------
     /** Compare two paths */
-    bool ComparePaths (const char* one, const char* second) const;
+    bool ComparePaths (const char* one, const char* second) const override;
 
     /** @brief get the file name of a full filepath
      * example: /tmp/archive.tar.gz -> archive.tar.gz
diff --git a/include/assimp/DefaultLogger.hpp b/include/assimp/DefaultLogger.hpp
index f71bb07aa..a83aedbd7 100644
--- a/include/assimp/DefaultLogger.hpp
+++ b/include/assimp/DefaultLogger.hpp
@@ -4,7 +4,6 @@ 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,
@@ -39,12 +38,19 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ----------------------------------------------------------------------
 */
-/** @file DefaultLogger.hpp
-*/
 
+/**
+ *  @file DefaultLogger.hpp
+ */
+
+#pragma once
 #ifndef INCLUDED_AI_DEFAULTLOGGER
 #define INCLUDED_AI_DEFAULTLOGGER
 
+#ifdef __GNUC__
+#   pragma GCC system_header
+#endif
+
 #include "LogStream.hpp"
 #include "Logger.hpp"
 #include "NullLogger.hpp"
@@ -55,7 +61,7 @@ namespace Assimp {
 class IOStream;
 struct LogStreamInfo;
 
-/** default name of logfile */
+/** default name of log-file */
 #define ASSIMP_DEFAULT_LOG_NAME "AssimpLog.txt"
 
 // ------------------------------------------------------------------------------------
@@ -72,7 +78,6 @@ struct LogStreamInfo;
  *  implementation of #Logger to #set().
  *  @note The whole logging stuff causes a small extra overhead for all imports. */
 class ASSIMP_API DefaultLogger : public Logger {
-
 public:
     // ----------------------------------------------------------------------
     /** @brief Creates a logging instance.
@@ -121,13 +126,11 @@ public:
 
     // ----------------------------------------------------------------------
     /** @copydoc Logger::attachStream   */
-    bool attachStream(LogStream *pStream,
-            unsigned int severity);
+    bool attachStream(LogStream *pStream, unsigned int severity) override;
 
     // ----------------------------------------------------------------------
     /** @copydoc Logger::detachStream */
-    bool detachStream(LogStream *pStream,
-            unsigned int severity);
+    bool detachStream(LogStream *pStream, unsigned int severity) override;
 
 private:
     // ----------------------------------------------------------------------
@@ -137,22 +140,22 @@ private:
 
     // ----------------------------------------------------------------------
     /** @briefDestructor    */
-    ~DefaultLogger();
+    ~DefaultLogger() override;
 
     /** @brief  Logs debug infos, only been written when severity level DEBUG or higher is set */
-    void OnDebug(const char *message);
+    void OnDebug(const char *message) override;
 
     /** @brief  Logs debug infos, only been written when severity level VERBOSE is set */
-    void OnVerboseDebug(const char *message);
+    void OnVerboseDebug(const char *message) override;
 
     /** @brief  Logs an info message */
-    void OnInfo(const char *message);
+    void OnInfo(const char *message) override;
 
     /** @brief  Logs a warning message */
-    void OnWarn(const char *message);
+    void OnWarn(const char *message) override;
 
     /** @brief  Logs an error message */
-    void OnError(const char *message);
+    void OnError(const char *message) override;
 
     // ----------------------------------------------------------------------
     /** @brief Writes a message to all streams */
@@ -167,9 +170,9 @@ private:
 
 private:
     //  Aliases for stream container
-    typedef std::vector<LogStreamInfo *> StreamArray;
-    typedef std::vector<LogStreamInfo *>::iterator StreamIt;
-    typedef std::vector<LogStreamInfo *>::const_iterator ConstStreamIt;
+    using StreamArray = std::vector<LogStreamInfo *>;
+    using StreamIt = std::vector<LogStreamInfo *>::iterator;
+    using ConstStreamIt = std::vector<LogStreamInfo *>::const_iterator;
 
     //! only logging instance
     static Logger *m_pLogger;
@@ -182,6 +185,7 @@ private:
     char lastMsg[MAX_LOG_MESSAGE_LENGTH * 2];
     size_t lastLen;
 };
+
 // ------------------------------------------------------------------------------------
 
 } // Namespace Assimp
diff --git a/include/assimp/Defines.h b/include/assimp/Defines.h
deleted file mode 100644
index a756b2864..000000000
--- a/include/assimp/Defines.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-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.
-
-----------------------------------------------------------------------
-*/
-
-#pragma once
-#ifndef AI_DEFINES_H_INC
-#define AI_DEFINES_H_INC
-
-#ifdef __GNUC__
-#   pragma GCC system_header
-#endif
-
-// We need those constants, workaround for any platforms where nobody defined them yet
-#if (!defined SIZE_MAX)
-#   define SIZE_MAX (~((size_t)0))
-#endif
-
-#if (!defined UINT_MAX)
-#   define UINT_MAX (~((unsigned int)0))
-#endif
-
-#endif // AI_DEINES_H_INC
diff --git a/include/assimp/Exceptional.h b/include/assimp/Exceptional.h
index 1bf399cbc..3078de9f4 100644
--- a/include/assimp/Exceptional.h
+++ b/include/assimp/Exceptional.h
@@ -56,10 +56,22 @@ using std::runtime_error;
 #pragma warning(disable : 4275)
 #endif
 
+// ---------------------------------------------------------------------------
+/**
+ *  The base-class for all other exceptions
+ */
 class ASSIMP_API DeadlyErrorBase : public runtime_error {
 protected:
+    /// @brief The class constructor with the formatter.
+    /// @param f    The formatter.
     DeadlyErrorBase(Assimp::Formatter::format f);
 
+    /// @brief The class constructor with the parameter ellipse.
+    /// @tparam ...T    The type for the ellipse
+    /// @tparam U       The other type
+    /// @param f        The formatter
+    /// @param u        One parameter
+    /// @param ...args  The rest
     template<typename... T, typename U>
     DeadlyErrorBase(Assimp::Formatter::format f, U&& u, T&&... args) :
             DeadlyErrorBase(std::move(f << std::forward<U>(u)), std::forward<T>(args)...) {}
@@ -71,19 +83,31 @@ protected:
  *  nullptr instead of a valid aiScene then.  */
 class ASSIMP_API DeadlyImportError : public DeadlyErrorBase {
 public:
+    /// @brief The class constructor with the message.
+    /// @param message  The message
     DeadlyImportError(const char *message) :
-            DeadlyErrorBase(Assimp::Formatter::format(), std::forward<const char*>(message)) {}
+            DeadlyErrorBase(Assimp::Formatter::format(), std::forward<const char*>(message)) {
+        // empty
+    }
 
-    /** Constructor with arguments */
+    /// @brief The class constructor with the parameter ellipse.
+    /// @tparam ...T    The type for the ellipse
+    /// @param ...args  The args
     template<typename... T>
     explicit DeadlyImportError(T&&... args) :
-            DeadlyErrorBase(Assimp::Formatter::format(), std::forward<T>(args)...) {}
+            DeadlyErrorBase(Assimp::Formatter::format(), std::forward<T>(args)...) {
+        // empty
+    }
 
 #if defined(_MSC_VER) && defined(__clang__)
     DeadlyImportError(DeadlyImportError& other) = delete;
 #endif
 };
 
+// ---------------------------------------------------------------------------
+/** FOR EXPORTER PLUGINS ONLY: Simple exception class to be thrown if an
+ *  unrecoverable error occurs while exporting. Exporting APIs return
+ *  nullptr instead of a valid aiScene then.  */
 class ASSIMP_API DeadlyExportError : public DeadlyErrorBase {
 public:
     /** Constructor with arguments */
diff --git a/include/assimp/IOStream.hpp b/include/assimp/IOStream.hpp
index 980e62bf8..bbf3537ba 100644
--- a/include/assimp/IOStream.hpp
+++ b/include/assimp/IOStream.hpp
@@ -5,8 +5,6 @@ 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,
diff --git a/include/assimp/IOStreamBuffer.h b/include/assimp/IOStreamBuffer.h
index c3b7327ff..d54774759 100644
--- a/include/assimp/IOStreamBuffer.h
+++ b/include/assimp/IOStreamBuffer.h
@@ -4,7 +4,6 @@ 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,
@@ -45,12 +44,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define AI_IOSTREAMBUFFER_H_INC
 
 #ifdef __GNUC__
-#   pragma GCC system_header
+#pragma GCC system_header
 #endif
 
+#include <assimp/ParsingUtils.h>
 #include <assimp/types.h>
 #include <assimp/IOStream.hpp>
-#include <assimp/ParsingUtils.h>
 
 #include <vector>
 
@@ -60,11 +59,11 @@ namespace Assimp {
 /**
  *  Implementation of a cached stream buffer.
  */
-template<class T>
+template <class T>
 class IOStreamBuffer {
 public:
     /// @brief  The class constructor.
-    IOStreamBuffer( size_t cache = 4096 * 4096 );
+    IOStreamBuffer(size_t cache = 4096 * 4096);
 
     /// @brief  The class destructor.
     ~IOStreamBuffer();
@@ -72,7 +71,7 @@ public:
     /// @brief  Will open the cached access for a given stream.
     /// @param  stream      The stream to cache.
     /// @return true if successful.
-    bool open( IOStream *stream );
+    bool open(IOStream *stream);
 
     /// @brief  Will close the cached access.
     /// @return true if successful.
@@ -105,7 +104,7 @@ public:
     /// @brief  Will read the next line.
     /// @param  buffer      The buffer for the next line.
     /// @return true if successful.
-    bool getNextDataLine( std::vector<T> &buffer, T continuationToken );
+    bool getNextDataLine(std::vector<T> &buffer, T continuationToken);
 
     /// @brief  Will read the next line ascii or binary end line char.
     /// @param  buffer      The buffer for the next line.
@@ -115,7 +114,7 @@ public:
     /// @brief  Will read the next block.
     /// @param  buffer      The buffer for the next block.
     /// @return true if successful.
-    bool getNextBlock( std::vector<T> &buffer );
+    bool getNextBlock(std::vector<T> &buffer);
 
 private:
     IOStream *m_stream;
@@ -128,95 +127,92 @@ private:
     size_t m_filePos;
 };
 
-template<class T>
-AI_FORCE_INLINE
-IOStreamBuffer<T>::IOStreamBuffer( size_t cache )
-: m_stream( nullptr )
-, m_filesize( 0 )
-, m_cacheSize( cache )
-, m_numBlocks( 0 )
-, m_blockIdx( 0 )
-, m_cachePos( 0 )
-, m_filePos( 0 ) {
-    m_cache.resize( cache );
-    std::fill( m_cache.begin(), m_cache.end(), '\n' );
+template <class T>
+AI_FORCE_INLINE IOStreamBuffer<T>::IOStreamBuffer(size_t cache) :
+        m_stream(nullptr),
+        m_filesize(0),
+        m_cacheSize(cache),
+        m_numBlocks(0),
+        m_blockIdx(0),
+        m_cachePos(0),
+        m_filePos(0) {
+    m_cache.resize(cache);
+    std::fill(m_cache.begin(), m_cache.end(), '\n');
 }
 
-template<class T>
-AI_FORCE_INLINE
-IOStreamBuffer<T>::~IOStreamBuffer() {
+template <class T>
+AI_FORCE_INLINE IOStreamBuffer<T>::~IOStreamBuffer() {
     // empty
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::open( IOStream *stream ) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::open(IOStream *stream) {
     //  file still opened!
-    if ( nullptr != m_stream ) {
+    if (nullptr != m_stream) {
         return false;
     }
 
     //  Invalid stream pointer
-    if ( nullptr == stream ) {
+    if (nullptr == stream) {
         return false;
     }
 
     m_stream = stream;
     m_filesize = m_stream->FileSize();
-    if ( m_filesize == 0 ) {
+    if (m_filesize == 0) {
         return false;
     }
-    if ( m_filesize < m_cacheSize ) {
+    if (m_filesize < m_cacheSize) {
         m_cacheSize = m_filesize;
     }
 
     m_numBlocks = m_filesize / m_cacheSize;
-    if ( ( m_filesize % m_cacheSize ) > 0 ) {
+    if ((m_filesize % m_cacheSize) > 0) {
         m_numBlocks++;
     }
 
     return true;
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::close() {
-    if ( nullptr == m_stream ) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::close() {
+    if (nullptr == m_stream) {
         return false;
     }
 
     // init counters and state vars
-    m_stream    = nullptr;
-    m_filesize  = 0;
+    m_stream = nullptr;
+    m_filesize = 0;
     m_numBlocks = 0;
-    m_blockIdx  = 0;
-    m_cachePos  = 0;
-    m_filePos   = 0;
+    m_blockIdx = 0;
+    m_cachePos = 0;
+    m_filePos = 0;
 
     return true;
 }
 
-template<class T>
+template <class T>
 AI_FORCE_INLINE
-size_t IOStreamBuffer<T>::size() const {
+        size_t
+        IOStreamBuffer<T>::size() const {
     return m_filesize;
 }
 
-template<class T>
+template <class T>
 AI_FORCE_INLINE
-size_t IOStreamBuffer<T>::cacheSize() const {
+        size_t
+        IOStreamBuffer<T>::cacheSize() const {
     return m_cacheSize;
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::readNextBlock() {
-    m_stream->Seek( m_filePos, aiOrigin_SET );
-    size_t readLen = m_stream->Read( &m_cache[ 0 ], sizeof( T ), m_cacheSize );
-    if ( readLen == 0 ) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::readNextBlock() {
+    m_stream->Seek(m_filePos, aiOrigin_SET);
+    size_t readLen = m_stream->Read(&m_cache[0], sizeof(T), m_cacheSize);
+    if (readLen == 0) {
         return false;
     }
-    if ( readLen < m_cacheSize ) {
+    if (readLen < m_cacheSize) {
         m_cacheSize = readLen;
     }
     m_filePos += m_cacheSize;
@@ -226,79 +222,73 @@ bool IOStreamBuffer<T>::readNextBlock() {
     return true;
 }
 
-template<class T>
-AI_FORCE_INLINE
-size_t IOStreamBuffer<T>::getNumBlocks() const {
+template <class T>
+AI_FORCE_INLINE size_t IOStreamBuffer<T>::getNumBlocks() const {
     return m_numBlocks;
 }
 
-template<class T>
-AI_FORCE_INLINE
-size_t IOStreamBuffer<T>::getCurrentBlockIndex() const {
+template <class T>
+AI_FORCE_INLINE size_t IOStreamBuffer<T>::getCurrentBlockIndex() const {
     return m_blockIdx;
 }
 
-template<class T>
-AI_FORCE_INLINE
-size_t IOStreamBuffer<T>::getFilePos() const {
+template <class T>
+AI_FORCE_INLINE size_t IOStreamBuffer<T>::getFilePos() const {
     return m_filePos;
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::getNextDataLine( std::vector<T> &buffer, T continuationToken ) {
-    buffer.resize( m_cacheSize );
-    if ( m_cachePos >= m_cacheSize || 0 == m_filePos ) {
-        if ( !readNextBlock() ) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::getNextDataLine(std::vector<T> &buffer, T continuationToken) {
+    buffer.resize(m_cacheSize);
+    if (m_cachePos >= m_cacheSize || 0 == m_filePos) {
+        if (!readNextBlock()) {
             return false;
         }
     }
 
     size_t i = 0;
-    for( ;; ) {
-        if ( continuationToken == m_cache[ m_cachePos ] && IsLineEnd( m_cache[ m_cachePos + 1 ] ) ) {
+    for (;;) {
+        if (continuationToken == m_cache[m_cachePos] && IsLineEnd(m_cache[m_cachePos + 1])) {
             ++m_cachePos;
-            while ( m_cache[ m_cachePos ] != '\n' ) {
+            while (m_cache[m_cachePos] != '\n') {
                 ++m_cachePos;
             }
             ++m_cachePos;
-        } else if ( IsLineEnd ( m_cache[ m_cachePos ] ) ) {
+        } else if (IsLineEnd(m_cache[m_cachePos])) {
             break;
         }
 
-        buffer[ i ] = m_cache[ m_cachePos ];
+        buffer[i] = m_cache[m_cachePos];
         ++m_cachePos;
         ++i;
         if (m_cachePos >= size()) {
             break;
         }
-        if ( m_cachePos >= m_cacheSize ) {
-            if ( !readNextBlock() ) {
+        if (m_cachePos >= m_cacheSize) {
+            if (!readNextBlock()) {
                 return false;
             }
         }
     }
 
-    buffer[ i ] = '\n';
+    buffer[i] = '\n';
     ++m_cachePos;
 
     return true;
 }
 
-static AI_FORCE_INLINE
-bool isEndOfCache( size_t pos, size_t cacheSize ) {
-    return ( pos == cacheSize );
+static AI_FORCE_INLINE bool isEndOfCache(size_t pos, size_t cacheSize) {
+    return (pos == cacheSize);
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::getNextLine(std::vector<T> &buffer) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::getNextLine(std::vector<T> &buffer) {
     buffer.resize(m_cacheSize);
-    if ( isEndOfCache( m_cachePos, m_cacheSize ) || 0 == m_filePos) {
-       if (!readNextBlock()) {
-          return false;
-       }
-      }
+    if (isEndOfCache(m_cachePos, m_cacheSize) || 0 == m_filePos) {
+        if (!readNextBlock()) {
+            return false;
+        }
+    }
 
     if (IsLineEnd(m_cache[m_cachePos])) {
         // skip line end
@@ -306,16 +296,16 @@ bool IOStreamBuffer<T>::getNextLine(std::vector<T> &buffer) {
             ++m_cachePos;
         }
         ++m_cachePos;
-        if ( isEndOfCache( m_cachePos, m_cacheSize ) ) {
-            if ( !readNextBlock() ) {
+        if (isEndOfCache(m_cachePos, m_cacheSize)) {
+            if (!readNextBlock()) {
                 return false;
             }
         }
     }
 
-    size_t i( 0 );
-    while (!IsLineEnd(m_cache[ m_cachePos ])) {
-        buffer[i] = m_cache[ m_cachePos ];
+    size_t i(0);
+    while (!IsLineEnd(m_cache[m_cachePos])) {
+        buffer[i] = m_cache[m_cachePos];
         ++m_cachePos;
         ++i;
         if (m_cachePos >= m_cacheSize) {
@@ -330,15 +320,14 @@ bool IOStreamBuffer<T>::getNextLine(std::vector<T> &buffer) {
     return true;
 }
 
-template<class T>
-AI_FORCE_INLINE
-bool IOStreamBuffer<T>::getNextBlock( std::vector<T> &buffer) {
+template <class T>
+AI_FORCE_INLINE bool IOStreamBuffer<T>::getNextBlock(std::vector<T> &buffer) {
     // Return the last block-value if getNextLine was used before
-    if ( 0 != m_cachePos ) {
-        buffer = std::vector<T>( m_cache.begin() + m_cachePos, m_cache.end() );
+    if (0 != m_cachePos) {
+        buffer = std::vector<T>(m_cache.begin() + m_cachePos, m_cache.end());
         m_cachePos = 0;
     } else {
-        if ( !readNextBlock() ) {
+        if (!readNextBlock()) {
             return false;
         }
 
@@ -348,6 +337,6 @@ bool IOStreamBuffer<T>::getNextBlock( std::vector<T> &buffer) {
     return true;
 }
 
-} // !ns Assimp
+} // namespace Assimp
 
 #endif // AI_IOSTREAMBUFFER_H_INC
diff --git a/include/assimp/IOSystem.hpp b/include/assimp/IOSystem.hpp
index 7be373cf1..dda0718e6 100644
--- a/include/assimp/IOSystem.hpp
+++ b/include/assimp/IOSystem.hpp
@@ -5,8 +5,6 @@ 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,
@@ -63,8 +61,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifdef _WIN32
 #   include <direct.h>
-#   include <stdlib.h>
-#   include <stdio.h>
+#   include <cstdlib>
+#   include <cstdio>
 #else
 #   include <sys/stat.h>
 #   include <sys/types.h>
@@ -75,7 +73,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace Assimp    {
 
-    class IOStream;
+class IOStream;
 
 // ---------------------------------------------------------------------------
 /** @brief CPP-API: Interface to the file system.
@@ -226,22 +224,26 @@ public:
      */
     virtual bool ChangeDirectory( const std::string &path );
 
-    virtual bool DeleteFile( const std::string &file );
+    // -------------------------------------------------------------------
+    /**
+     *  @brief  Will delete the given file.
+     *  @param file     [in] The filename
+     *  @return true, if the file wase deleted, false if not.
+     */
+    virtual bool DeleteFile(const std::string &file);
 
 private:
     std::vector<std::string> m_pathStack;
 };
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-IOSystem::IOSystem() AI_NO_EXCEPT
-: m_pathStack() {
+AI_FORCE_INLINE IOSystem::IOSystem() AI_NO_EXCEPT :
+        m_pathStack() {
     // empty
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-IOSystem::~IOSystem() {
+AI_FORCE_INLINE IOSystem::~IOSystem() {
     // empty
 }
 
@@ -252,8 +254,7 @@ IOSystem::~IOSystem() {
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-IOStream* IOSystem::Open(const std::string& pFile, const std::string& pMode) {
+AI_FORCE_INLINE IOStream* IOSystem::Open(const std::string& pFile, const std::string& pMode) {
     // NOTE:
     // For compatibility, interface was changed to const char* to
     // avoid crashes between binary incompatible STL versions
@@ -261,8 +262,7 @@ IOStream* IOSystem::Open(const std::string& pFile, const std::string& pMode) {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::Exists( const std::string& pFile) const {
+AI_FORCE_INLINE bool IOSystem::Exists( const std::string& pFile) const {
     // NOTE:
     // For compatibility, interface was changed to const char* to
     // avoid crashes between binary incompatible STL versions
@@ -270,8 +270,7 @@ bool IOSystem::Exists( const std::string& pFile) const {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::ComparePaths (const std::string& one, const std::string& second) const {
+AI_FORCE_INLINE bool IOSystem::ComparePaths(const std::string& one, const std::string& second) const {
     // NOTE:
     // For compatibility, interface was changed to const char* to
     // avoid crashes between binary incompatible STL versions
@@ -279,8 +278,7 @@ bool IOSystem::ComparePaths (const std::string& one, const std::string& second)
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::PushDirectory( const std::string &path ) {
+AI_FORCE_INLINE bool IOSystem::PushDirectory( const std::string &path ) {
     if ( path.empty() ) {
         return false;
     }
@@ -291,8 +289,7 @@ bool IOSystem::PushDirectory( const std::string &path ) {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-const std::string &IOSystem::CurrentDirectory() const {
+AI_FORCE_INLINE const std::string &IOSystem::CurrentDirectory() const {
     if ( m_pathStack.empty() ) {
         static const std::string Dummy;
         return Dummy;
@@ -301,14 +298,12 @@ const std::string &IOSystem::CurrentDirectory() const {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-size_t IOSystem::StackSize() const {
+AI_FORCE_INLINE size_t IOSystem::StackSize() const {
     return m_pathStack.size();
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::PopDirectory() {
+AI_FORCE_INLINE bool IOSystem::PopDirectory() {
     if ( m_pathStack.empty() ) {
         return false;
     }
@@ -319,8 +314,7 @@ bool IOSystem::PopDirectory() {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::CreateDirectory( const std::string &path ) {
+AI_FORCE_INLINE bool IOSystem::CreateDirectory( const std::string &path ) {
     if ( path.empty() ) {
         return false;
     }
@@ -333,8 +327,7 @@ bool IOSystem::CreateDirectory( const std::string &path ) {
 }
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::ChangeDirectory( const std::string &path ) {
+AI_FORCE_INLINE bool IOSystem::ChangeDirectory( const std::string &path ) {
     if ( path.empty() ) {
         return false;
     }
@@ -348,8 +341,7 @@ bool IOSystem::ChangeDirectory( const std::string &path ) {
 
 
 // ----------------------------------------------------------------------------
-AI_FORCE_INLINE
-bool IOSystem::DeleteFile( const std::string &file ) {
+AI_FORCE_INLINE bool IOSystem::DeleteFile( const std::string &file ) {
     if ( file.empty() ) {
         return false;
     }
diff --git a/include/assimp/Importer.hpp b/include/assimp/Importer.hpp
index 09b5b6883..97f34090e 100644
--- a/include/assimp/Importer.hpp
+++ b/include/assimp/Importer.hpp
@@ -59,7 +59,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // Public ASSIMP data structures
 #include <assimp/types.h>
 
-#include <exception>
+//#include <exception>
 
 namespace Assimp {
 // =======================================================================
diff --git a/include/assimp/LineSplitter.h b/include/assimp/LineSplitter.h
index 44e6f0f1e..0a9d24437 100644
--- a/include/assimp/LineSplitter.h
+++ b/include/assimp/LineSplitter.h
@@ -4,7 +4,6 @@ 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,
@@ -144,26 +143,23 @@ private:
     bool mSwallow, mSkip_empty_lines, mTrim;
 };
 
-AI_FORCE_INLINE
-LineSplitter::LineSplitter(StreamReaderLE& stream, bool skip_empty_lines, bool trim )
-: mIdx(0)
-, mCur()
-, mStream(stream)
-, mSwallow()
-, mSkip_empty_lines(skip_empty_lines)
-, mTrim(trim) {
+AI_FORCE_INLINE LineSplitter::LineSplitter(StreamReaderLE& stream, bool skip_empty_lines, bool trim ) :
+        mIdx(0),
+        mCur(),
+        mStream(stream),
+        mSwallow(),
+        mSkip_empty_lines(skip_empty_lines),
+        mTrim(trim) {
     mCur.reserve(1024);
     operator++();
     mIdx = 0;
 }
 
-AI_FORCE_INLINE
-LineSplitter::~LineSplitter() {
+AI_FORCE_INLINE LineSplitter::~LineSplitter() {
     // empty
 }
 
-AI_FORCE_INLINE
-LineSplitter& LineSplitter::operator++() {
+AI_FORCE_INLINE LineSplitter& LineSplitter::operator++() {
     if (mSwallow) {
         mSwallow = false;
         return *this;
@@ -203,18 +199,15 @@ LineSplitter& LineSplitter::operator++() {
     return *this;
 }
 
-AI_FORCE_INLINE
-LineSplitter &LineSplitter::operator++(int) {
+AI_FORCE_INLINE LineSplitter &LineSplitter::operator++(int) {
     return ++(*this);
 }
 
-AI_FORCE_INLINE
-const char *LineSplitter::operator[] (size_t idx) const {
+AI_FORCE_INLINE const char *LineSplitter::operator[] (size_t idx) const {
     const char* s = operator->()->c_str();
 
     SkipSpaces(&s);
     for (size_t i = 0; i < idx; ++i) {
-
         for (; !IsSpace(*s); ++s) {
             if (IsLineEnd(*s)) {
                 throw std::range_error("Token index out of range, EOL reached");
@@ -226,8 +219,7 @@ const char *LineSplitter::operator[] (size_t idx) const {
 }
 
 template <size_t N>
-AI_FORCE_INLINE
-void LineSplitter::get_tokens(const char* (&tokens)[N]) const {
+AI_FORCE_INLINE void LineSplitter::get_tokens(const char* (&tokens)[N]) const {
     const char* s = operator->()->c_str();
 
     SkipSpaces(&s);
@@ -242,45 +234,37 @@ void LineSplitter::get_tokens(const char* (&tokens)[N]) const {
     }
 }
 
-AI_FORCE_INLINE
-const std::string* LineSplitter::operator -> () const {
+AI_FORCE_INLINE const std::string* LineSplitter::operator -> () const {
     return &mCur;
 }
 
-AI_FORCE_INLINE
-std::string LineSplitter::operator* () const {
+AI_FORCE_INLINE std::string LineSplitter::operator* () const {
     return mCur;
 }
 
-AI_FORCE_INLINE
-LineSplitter::operator bool() const {
+AI_FORCE_INLINE LineSplitter::operator bool() const {
     return mStream.GetRemainingSize() > 0;
 }
 
-AI_FORCE_INLINE
-LineSplitter::operator line_idx() const {
+AI_FORCE_INLINE LineSplitter::operator line_idx() const {
     return mIdx;
 }
 
-AI_FORCE_INLINE
-LineSplitter::line_idx LineSplitter::get_index() const {
+AI_FORCE_INLINE LineSplitter::line_idx LineSplitter::get_index() const {
     return mIdx;
 }
 
-AI_FORCE_INLINE
-StreamReaderLE &LineSplitter::get_stream() {
+AI_FORCE_INLINE StreamReaderLE &LineSplitter::get_stream() {
     return mStream;
 }
 
-AI_FORCE_INLINE
-bool LineSplitter::match_start(const char* check) {
+AI_FORCE_INLINE bool LineSplitter::match_start(const char* check) {
     const size_t len = ::strlen(check);
 
     return len <= mCur.length() && std::equal(check, check + len, mCur.begin());
 }
 
-AI_FORCE_INLINE
-void LineSplitter::swallow_next_increment() {
+AI_FORCE_INLINE void LineSplitter::swallow_next_increment() {
     mSwallow = true;
 }
 
diff --git a/include/assimp/LogAux.h b/include/assimp/LogAux.h
index 065433648..70e07790e 100644
--- a/include/assimp/LogAux.h
+++ b/include/assimp/LogAux.h
@@ -4,7 +4,6 @@ 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,
@@ -57,6 +56,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace Assimp {
 
+/// @brief Logger class, which will exten the class by log-functions.
+/// @tparam TDeriving 
 template<class TDeriving>
 class LogFunctions {
 public:
@@ -109,8 +110,8 @@ public:
 
 private:
     static const char* Prefix();
-
 };
+
 } // ! Assimp
 
-#endif
+#endif // INCLUDED_AI_LOGAUX_H
diff --git a/include/assimp/LogStream.hpp b/include/assimp/LogStream.hpp
index 3c2a587a2..64a7955fd 100644
--- a/include/assimp/LogStream.hpp
+++ b/include/assimp/LogStream.hpp
@@ -4,7 +4,6 @@ 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,
@@ -43,9 +42,14 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file LogStream.hpp
  *  @brief Abstract base class 'LogStream', representing an output log stream.
  */
+#pragma once
 #ifndef INCLUDED_AI_LOGSTREAM_H
 #define INCLUDED_AI_LOGSTREAM_H
 
+#ifdef __GNUC__
+#pragma GCC system_header
+#endif
+
 #include "types.h"
 
 namespace Assimp {
@@ -103,7 +107,6 @@ inline LogStream::~LogStream() {
     // empty
 }
 
-// ------------------------------------------------------------------------------------
 } // Namespace Assimp
 
-#endif
+#endif // INCLUDED_AI_LOGSTREAM_H
diff --git a/include/assimp/Logger.hpp b/include/assimp/Logger.hpp
index aa7ffba7c..549b0fbc2 100644
--- a/include/assimp/Logger.hpp
+++ b/include/assimp/Logger.hpp
@@ -4,7 +4,6 @@ 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,
@@ -43,6 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file Logger.hpp
  *  @brief Abstract base class 'Logger', base of the logging system.
  */
+#pragma once
 #ifndef INCLUDED_AI_LOGGER_H
 #define INCLUDED_AI_LOGGER_H
 
@@ -93,8 +93,6 @@ public:
         Err         = 8     //!< Error log message
     };
 
-public:
-
     /** @brief  Virtual destructor */
     virtual ~Logger();
 
@@ -259,39 +257,30 @@ protected:
 };
 
 // ----------------------------------------------------------------------------------
-//  Default constructor
-inline
-Logger::Logger() AI_NO_EXCEPT
-: m_Severity(NORMAL) {
+inline Logger::Logger() AI_NO_EXCEPT :
+        m_Severity(NORMAL) {
     // empty
 }
 
 // ----------------------------------------------------------------------------------
-//  Virtual destructor
-inline
-Logger::~Logger() {
+inline Logger::~Logger() {
     // empty
 }
 
 // ----------------------------------------------------------------------------------
-// Construction with given logging severity
-inline
-Logger::Logger(LogSeverity severity)
-: m_Severity(severity) {
+inline Logger::Logger(LogSeverity severity) :
+        m_Severity(severity) {
     // empty
 }
 
 // ----------------------------------------------------------------------------------
-// Log severity setter
-inline
-void Logger::setLogSeverity(LogSeverity log_severity){
+inline void Logger::setLogSeverity(LogSeverity log_severity){
     m_Severity = log_severity;
 }
 
 // ----------------------------------------------------------------------------------
 // Log severity getter
-inline
-Logger::LogSeverity Logger::getLogSeverity() const {
+inline Logger::LogSeverity Logger::getLogSeverity() const {
     return m_Severity;
 }
 
diff --git a/include/assimp/NullLogger.hpp b/include/assimp/NullLogger.hpp
index 8281da4f7..8277b014a 100644
--- a/include/assimp/NullLogger.hpp
+++ b/include/assimp/NullLogger.hpp
@@ -44,9 +44,14 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief Dummy logger
 */
 
+#pragma once
 #ifndef INCLUDED_AI_NULLLOGGER_H
 #define INCLUDED_AI_NULLLOGGER_H
 
+#ifdef __GNUC__
+#pragma GCC system_header
+#endif
+
 #include "Logger.hpp"
 
 namespace Assimp {
diff --git a/include/assimp/SceneCombiner.h b/include/assimp/SceneCombiner.h
index 75995a9ec..809ac30e4 100644
--- a/include/assimp/SceneCombiner.h
+++ b/include/assimp/SceneCombiner.h
@@ -51,12 +51,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #pragma GCC system_header
 #endif
 
-#include <assimp/Defines.h>
 #include <assimp/ai_assert.h>
 #include <assimp/types.h>
 
-#include <stddef.h>
-#include <stdint.h>
+#include <cstddef>
+#include <cstdint>
 #include <list>
 #include <set>
 #include <vector>
diff --git a/include/assimp/StreamReader.h b/include/assimp/StreamReader.h
index 9afaf70bc..1880f66b6 100644
--- a/include/assimp/StreamReader.h
+++ b/include/assimp/StreamReader.h
@@ -47,11 +47,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define AI_STREAMREADER_H_INCLUDED
 
 #ifdef __GNUC__
-#pragma GCC system_header
+#   pragma GCC system_header
 #endif
 
 #include <assimp/ByteSwapper.h>
-#include <assimp/Defines.h>
 #include <assimp/Exceptional.h>
 #include <assimp/IOStream.hpp>
 
diff --git a/include/assimp/aabb.h b/include/assimp/aabb.h
index cbf6193cb..a6ccdd452 100644
--- a/include/assimp/aabb.h
+++ b/include/assimp/aabb.h
@@ -44,36 +44,40 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define AI_AABB_H_INC
 
 #ifdef __GNUC__
-#   pragma GCC system_header
+#pragma GCC system_header
 #endif
 
 #include <assimp/vector3.h>
 
+// ---------------------------------------------------------------------------
+/** 
+ *  An axis-aligned bounding box.  
+ */
 struct aiAABB {
     C_STRUCT aiVector3D mMin;
     C_STRUCT aiVector3D mMax;
 
 #ifdef __cplusplus
-
-    aiAABB()
-    : mMin()
-    , mMax() {
+    /// @brief The default class constructor.
+    aiAABB() :
+            mMin(), mMax() {
         // empty
     }
 
-    aiAABB(const aiVector3D &min, const aiVector3D &max )
-    : mMin(min)
-    , mMax(max) {
+    /// @brief The class constructor with the minimum and maximum.
+    /// @param min  The minimum dimension.
+    /// @param max  The maximum dimension.
+    aiAABB(const aiVector3D &min, const aiVector3D &max) :
+            mMin(min), mMax(max) {
         // empty
     }
 
+    ///	@brief  The class destructor.
     ~aiAABB() {
         // empty
     }
 
 #endif // __cplusplus
-
 };
 
-
 #endif // AI_AABB_H_INC
diff --git a/include/assimp/ai_assert.h b/include/assimp/ai_assert.h
index b377b6e8b..b4f1ef8b2 100644
--- a/include/assimp/ai_assert.h
+++ b/include/assimp/ai_assert.h
@@ -38,6 +38,11 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ---------------------------------------------------------------------------
 */
+
+/** @file ai_assert.h
+ *  @brief Declares the assimp-specific assertion handler.
+ */
+
 #pragma once
 #ifndef AI_ASSERT_H_INC
 #define AI_ASSERT_H_INC
@@ -46,19 +51,24 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if defined(ASSIMP_BUILD_DEBUG)
 
-namespace Assimp
-{
-    // Assert violation behavior can be customized: see AssertHandler.h.
-    ASSIMP_API void aiAssertViolation(const char* failedExpression, const char* file, int line);
+namespace Assimp {
+
+/// @brief Assert violation behavior can be customized: see AssertHandler.h.
+/// @param failedExpression     The expression to validate.
+/// @param file                 The file location    
+/// @param line                 The line number
+ASSIMP_API void aiAssertViolation(const char* failedExpression, const char* file, int line);
+
 }
+#endif
 
-#    define ai_assert(expression) (void)((!!(expression)) || (Assimp::aiAssertViolation(#expression, __FILE__, __LINE__), 0))
-#    define ai_assert_entry() ai_assert(false)
-
+// Define assertion resolinig
+#if defined(ASSIMP_BUILD_DEBUG)
+#   define ai_assert(expression) (void)((!!(expression)) || (Assimp::aiAssertViolation(#expression, __FILE__, __LINE__), 0))
+#   define ai_assert_entry() ai_assert(false)
 #else
 #   define  ai_assert(expression)
 #   define  ai_assert_entry()
 #endif // ASSIMP_BUILD_DEBUG
 
 #endif // AI_ASSERT_H_INC
-
diff --git a/include/assimp/camera.h b/include/assimp/camera.h
index 6a7acadbb..56c4dbe3f 100644
--- a/include/assimp/camera.h
+++ b/include/assimp/camera.h
@@ -48,7 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define AI_CAMERA_H_INC
 
 #ifdef __GNUC__
-#   pragma GCC system_header
+#pragma GCC system_header
 #endif
 
 #include "types.h"
@@ -100,8 +100,7 @@ extern "C" {
  * camera already look in the right direction.
  *
 */
-struct aiCamera
-{
+struct aiCamera {
     /** The name of the camera.
      *
      *  There must be a node in the scenegraph with the same name.
@@ -127,7 +126,6 @@ struct aiCamera
      */
     C_STRUCT aiVector3D mUp;
 
-
     /** 'LookAt' - vector of the camera coordinate system relative to
      *  the coordinate space defined by the corresponding node.
      *
@@ -184,26 +182,27 @@ struct aiCamera
 #ifdef __cplusplus
 
     aiCamera() AI_NO_EXCEPT
-        : mUp                (0.f,1.f,0.f)
-        , mLookAt            (0.f,0.f,1.f)
-        , mHorizontalFOV     (0.25f * (float)AI_MATH_PI)
-        , mClipPlaneNear     (0.1f)
-        , mClipPlaneFar      (1000.f)
-        , mAspect            (0.f)
-        , mOrthographicWidth (0.f)
-    {}
+            : mUp(0.f, 1.f, 0.f),
+              mLookAt(0.f, 0.f, 1.f),
+              mHorizontalFOV(0.25f * (float)AI_MATH_PI),
+              mClipPlaneNear(0.1f),
+              mClipPlaneFar(1000.f),
+              mAspect(0.f),
+              mOrthographicWidth(0.f) {}
 
     /** @brief Get a *right-handed* camera matrix from me
      *  @param out Camera matrix to be filled
      */
-    void GetCameraMatrix (aiMatrix4x4& out) const
-    {
+    void GetCameraMatrix(aiMatrix4x4 &out) const {
         /** todo: test ... should work, but i'm not absolutely sure */
 
         /** We don't know whether these vectors are already normalized ...*/
-        aiVector3D zaxis = mLookAt;     zaxis.Normalize();
-        aiVector3D yaxis = mUp;         yaxis.Normalize();
-        aiVector3D xaxis = mUp^mLookAt; xaxis.Normalize();
+        aiVector3D zaxis = mLookAt;
+        zaxis.Normalize();
+        aiVector3D yaxis = mUp;
+        yaxis.Normalize();
+        aiVector3D xaxis = mUp ^ mLookAt;
+        xaxis.Normalize();
 
         out.a4 = -(xaxis * mPosition);
         out.b4 = -(yaxis * mPosition);
@@ -228,7 +227,6 @@ struct aiCamera
 #endif
 };
 
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/assimp/cfileio.h b/include/assimp/cfileio.h
index c1f8625b9..48a728a2a 100644
--- a/include/assimp/cfileio.h
+++ b/include/assimp/cfileio.h
@@ -5,8 +5,6 @@ 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,
@@ -106,8 +104,7 @@ struct aiFileIO
  *  the CRT. However, you can supply a custom implementation to Assimp by
  *  delivering a custom aiFileIO. Use this to enable reading from other sources,
  *  such as ZIP archives or memory locations. */
-struct aiFile
-{
+struct aiFile {
     /** Callback to read from a file */
     aiFileReadProc ReadProc;
 
diff --git a/include/assimp/color4.inl b/include/assimp/color4.inl
index fb31afa27..e5bfdf356 100644
--- a/include/assimp/color4.inl
+++ b/include/assimp/color4.inl
@@ -5,8 +5,6 @@ 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,
diff --git a/include/assimp/commonMetaData.h b/include/assimp/commonMetaData.h
index 128281bfb..28de15909 100644
--- a/include/assimp/commonMetaData.h
+++ b/include/assimp/commonMetaData.h
@@ -5,8 +5,6 @@ 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,
@@ -48,6 +46,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_COMMONMETADATA_H_INC
 #define AI_COMMONMETADATA_H_INC
 
+#ifdef __GNUC__
+#pragma GCC system_header
+#endif
+
 /// Scene metadata holding the name of the importer which loaded the source asset.
 /// This is always present if the scene was created from an imported asset.
 #define AI_METADATA_SOURCE_FORMAT "SourceAsset_Format"
diff --git a/include/assimp/defs.h b/include/assimp/defs.h
index 8d1011a28..e5f401999 100644
--- a/include/assimp/defs.h
+++ b/include/assimp/defs.h
@@ -93,6 +93,15 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ASSIMP_BUILD_NEED_UNZIP
 #endif
 
+// We need those constants, workaround for any platforms where nobody defined them yet
+#if (!defined SIZE_MAX)
+#define SIZE_MAX (~((size_t)0))
+#endif
+
+/*#if (!defined UINT_MAX)
+#define UINT_MAX (~((unsigned int)0))
+#endif*/
+
 //////////////////////////////////////////////////////////////////////////
 /* Define ASSIMP_BUILD_NO_XX_PROCESS to disable a specific
  * post processing step. This is the current list of process names ('XX'):
@@ -156,33 +165,33 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #endif // _WIN32
 
 #ifdef _MSC_VER
-  #pragma warning(disable : 4521 4512 4714 4127 4351 4510)
-  #ifdef ASSIMP_BUILD_DLL_EXPORT
-    #pragma warning(disable : 4251)
-  #endif
-  /* Force the compiler to inline a function, if possible */
-  #define AI_FORCE_INLINE inline
+    #pragma warning(disable : 4521 4512 4714 4127 4351 4510)
+    #ifdef ASSIMP_BUILD_DLL_EXPORT
+        #pragma warning(disable : 4251)
+    #endif
+    /* Force the compiler to inline a function, if possible */
+    #define AI_FORCE_INLINE inline
 
-  /* Tells the compiler that a function never returns. Used in code analysis
-   * to skip dead paths (e.g. after an assertion evaluated to false). */
-  #define AI_WONT_RETURN __declspec(noreturn)
+    /* Tells the compiler that a function never returns. Used in code analysis
+    * to skip dead paths (e.g. after an assertion evaluated to false). */
+    #define AI_WONT_RETURN __declspec(noreturn)
 #elif defined(SWIG)
   /* Do nothing, the relevant defines are all in AssimpSwigPort.i */
 #else
-  #define AI_WONT_RETURN
-  #define AI_FORCE_INLINE inline
+    #define AI_WONT_RETURN
+    #define AI_FORCE_INLINE inline
 #endif // (defined _MSC_VER)
 
 #ifdef __GNUC__
-#define AI_WONT_RETURN_SUFFIX __attribute__((noreturn))
+#   define AI_WONT_RETURN_SUFFIX __attribute__((noreturn))
 #else
-#define AI_WONT_RETURN_SUFFIX
+#   define AI_WONT_RETURN_SUFFIX
 #endif // (defined __clang__)
 
 #ifdef __cplusplus
 /* No explicit 'struct' and 'enum' tags for C++, this keeps showing up
-     * in doxydocs.
-     */
+ * in doxydocs. 
+ */
 #define C_STRUCT
 #define C_ENUM
 #else
diff --git a/include/assimp/light.h b/include/assimp/light.h
index 48efdaebd..f35f51e0a 100644
--- a/include/assimp/light.h
+++ b/include/assimp/light.h
@@ -5,8 +5,6 @@ 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,
@@ -62,8 +60,7 @@ extern "C" {
 // ---------------------------------------------------------------------------
 /** Enumerates all supported types of light sources.
  */
-enum aiLightSourceType
-{
+enum aiLightSourceType {
     aiLightSource_UNDEFINED     = 0x0,
 
     //! A directional light source has a well-defined direction
@@ -110,16 +107,15 @@ enum aiLightSourceType
  *  a single structure and distinguished by their parameters.
  *  Note - some file formats (such as 3DS, ASE) export a "target point" -
  *  the point a spot light is looking at (it can even be animated). Assimp
- *  writes the target point as a subnode of a spotlights's main node,
+ *  writes the target point as a sub-node of a spot-lights's main node,
  *  called "<spotName>.Target". However, this is just additional information
  *  then, the transformation tracks of the main node make the
  *  spot light already point in the right direction.
 */
-struct aiLight
-{
+struct aiLight {
     /** The name of the light source.
      *
-     *  There must be a node in the scenegraph with the same name.
+     *  There must be a node in the scene-graph with the same name.
      *  This node specifies the position of the light in the scene
      *  hierarchy and can be animated.
      */
diff --git a/include/assimp/matrix3x3.h b/include/assimp/matrix3x3.h
index 34b82fae4..c941d9f94 100644
--- a/include/assimp/matrix3x3.h
+++ b/include/assimp/matrix3x3.h
@@ -5,8 +5,6 @@ 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,
diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index e3aa847ff..8223b3443 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -5,7 +5,6 @@ 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,
@@ -578,7 +577,7 @@ enum aiMorphingMethod {
 * referencing the vertices. In addition there might be a series of bones, each
 * of them addressing a number of vertices with a certain weight. Vertex data
 * is presented in channels with each channel containing a single per-vertex
-* information such as a set of texture coords or a normal vector.
+* information such as a set of texture coordinates or a normal vector.
 * If a data pointer is non-null, the corresponding data stream is present.
 * From C++-programs you can also use the comfort functions Has*() to
 * test for the presence of various data streams.
@@ -668,7 +667,7 @@ struct aiMesh {
     */
     C_STRUCT aiColor4D *mColors[AI_MAX_NUMBER_OF_COLOR_SETS];
 
-    /** Vertex texture coords, also known as UV channels.
+    /** Vertex texture coordinates, also known as UV channels.
     * A mesh may contain 0 to AI_MAX_NUMBER_OF_TEXTURECOORDS per
     * vertex. nullptr if not present. The array is mNumVertices in size.
     */
@@ -683,7 +682,7 @@ struct aiMesh {
     * or cube maps). If the value is 2 for a given channel n, the
     * component p.z of mTextureCoords[n][p] is set to 0.0f.
     * If the value is 1 for a given channel, p.y is set to 0.0f, too.
-    * @note 4D coords are not supported
+    * @note 4D coordinates are not supported
     */
     unsigned int mNumUVComponents[AI_MAX_NUMBER_OF_TEXTURECOORDS];
 
@@ -736,12 +735,12 @@ struct aiMesh {
     C_STRUCT aiAnimMesh **mAnimMeshes;
 
     /**
-     *  Method of morphing when animeshes are specified.
+     *  Method of morphing when anim-meshes are specified.
      */
     unsigned int mMethod;
 
     /**
-     *
+     *  The bounding box.
      */
     C_STRUCT aiAABB mAABB;
 
diff --git a/include/assimp/scene.h b/include/assimp/scene.h
index dcf803572..61c2d4c6f 100644
--- a/include/assimp/scene.h
+++ b/include/assimp/scene.h
@@ -437,7 +437,7 @@ struct aiScene
 };
 
 #ifdef __cplusplus
-} //! namespace Assimp
-#endif
+} 
+#endif //! extern "C"
 
 #endif // AI_SCENE_H_INC