add assimp submodule

1 files changed, 695 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/Common/Exporter.cpp b/src/mesh/assimp-master/code/Common/Exporter.cpp
new file mode 100644
index 0000000..9a4e2cf
--- /dev/null
+++ b/src/mesh/assimp-master/code/Common/Exporter.cpp
@@ -0,0 +1,695 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Exporter.cpp
+
+Assimp export interface. While it's public interface bears many similarities
+to the import interface (in fact, it is largely symmetric), the internal
+implementations differs a lot. Exporters are considered stateless and are
+simple callbacks which we maintain in a global list along with their
+description strings.
+
+Here we implement only the C++ interface (Assimp::Exporter).
+*/
+
+#ifndef ASSIMP_BUILD_NO_EXPORT
+
+#include <assimp/BlobIOSystem.h>
+#include <assimp/SceneCombiner.h>
+#include <assimp/DefaultIOSystem.h>
+#include <assimp/Exporter.hpp>
+#include <assimp/mesh.h>
+#include <assimp/postprocess.h>
+#include <assimp/scene.h>
+#include <assimp/Exceptional.h>
+
+#include "Common/DefaultProgressHandler.h"
+#include "Common/BaseProcess.h"
+#include "Common/ScenePrivate.h"
+#include "PostProcessing/CalcTangentsProcess.h"
+#include "PostProcessing/MakeVerboseFormat.h"
+#include "PostProcessing/JoinVerticesProcess.h"
+#include "PostProcessing/ConvertToLHProcess.h"
+#include "PostProcessing/PretransformVertices.h"
+
+#include <memory>
+
+namespace Assimp {
+
+#ifdef _MSC_VER
+#    pragma warning( disable : 4800 )
+#endif // _MSC_VER
+
+
+// PostStepRegistry.cpp
+void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out);
+
+// ------------------------------------------------------------------------------------------------
+// Exporter worker function prototypes. Do not use const, because some exporter need to convert
+// the scene temporary
+#ifndef ASSIMP_BUILD_NO_COLLADA_EXPORTER
+void ExportSceneCollada(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_X_EXPORTER
+void ExportSceneXFile(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_STEP_EXPORTER
+void ExportSceneStep(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_OBJ_EXPORTER
+void ExportSceneObj(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneObjNoMtl(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_STL_EXPORTER
+void ExportSceneSTL(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneSTLBinary(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_PLY_EXPORTER
+void ExportScenePly(const char*,IOSystem*, const aiScene*, const ExportProperties*);
+void ExportScenePlyBinary(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_3DS_EXPORTER
+void ExportScene3DS(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_GLTF_EXPORTER
+void ExportSceneGLTF(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneGLB(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneGLTF2(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneGLB2(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_ASSBIN_EXPORTER
+void ExportSceneAssbin(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_ASSXML_EXPORTER
+void ExportSceneAssxml(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_X3D_EXPORTER
+void ExportSceneX3D(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+void ExportSceneFBX(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneFBXA(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_3MF_EXPORTER
+void ExportScene3MF( const char*, IOSystem*, const aiScene*, const ExportProperties* );
+#endif
+#ifndef ASSIMP_BUILD_NO_M3D_EXPORTER
+void ExportSceneM3D(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+void ExportSceneM3DA(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_ASSJSON_EXPORTER
+void ExportAssimp2Json(const char* , IOSystem*, const aiScene* , const Assimp::ExportProperties*);
+#endif
+#ifndef ASSIMP_BUILD_NO_PBRT_EXPORTER
+void ExportScenePbrt(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+#endif
+
+static void setupExporterArray(std::vector<Exporter::ExportFormatEntry> &exporters) {
+	(void)exporters;
+
+#ifndef ASSIMP_BUILD_NO_COLLADA_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("collada", "COLLADA - Digital Asset Exchange Schema", "dae", &ExportSceneCollada));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_X_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("x", "X Files", "x", &ExportSceneXFile,
+			aiProcess_MakeLeftHanded | aiProcess_FlipWindingOrder | aiProcess_FlipUVs));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_STEP_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("stp", "Step Files", "stp", &ExportSceneStep, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_OBJ_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("obj", "Wavefront OBJ format", "obj", &ExportSceneObj,
+			aiProcess_GenSmoothNormals /*| aiProcess_PreTransformVertices */));
+	exporters.push_back(Exporter::ExportFormatEntry("objnomtl", "Wavefront OBJ format without material file", "obj", &ExportSceneObjNoMtl,
+			aiProcess_GenSmoothNormals /*| aiProcess_PreTransformVertices */));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_STL_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("stl", "Stereolithography", "stl", &ExportSceneSTL,
+			aiProcess_Triangulate | aiProcess_GenNormals | aiProcess_PreTransformVertices));
+	exporters.push_back(Exporter::ExportFormatEntry("stlb", "Stereolithography (binary)", "stl", &ExportSceneSTLBinary,
+			aiProcess_Triangulate | aiProcess_GenNormals | aiProcess_PreTransformVertices));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_PLY_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("ply", "Stanford Polygon Library", "ply", &ExportScenePly,
+			aiProcess_PreTransformVertices));
+	exporters.push_back(Exporter::ExportFormatEntry("plyb", "Stanford Polygon Library (binary)", "ply", &ExportScenePlyBinary,
+			aiProcess_PreTransformVertices));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_3DS_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("3ds", "Autodesk 3DS (legacy)", "3ds", &ExportScene3DS,
+			aiProcess_Triangulate | aiProcess_SortByPType | aiProcess_JoinIdenticalVertices));
+#endif
+
+#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_EXPORTER)
+	exporters.push_back(Exporter::ExportFormatEntry("gltf2", "GL Transmission Format v. 2", "gltf", &ExportSceneGLTF2,
+			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
+	exporters.push_back(Exporter::ExportFormatEntry("glb2", "GL Transmission Format v. 2 (binary)", "glb", &ExportSceneGLB2,
+			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
+#endif
+
+#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_EXPORTER)
+	exporters.push_back(Exporter::ExportFormatEntry("gltf", "GL Transmission Format", "gltf", &ExportSceneGLTF,
+			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
+	exporters.push_back(Exporter::ExportFormatEntry("glb", "GL Transmission Format (binary)", "glb", &ExportSceneGLB,
+			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_ASSBIN_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("assbin", "Assimp Binary File", "assbin", &ExportSceneAssbin, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_ASSXML_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("assxml", "Assimp XML Document", "assxml", &ExportSceneAssxml, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_X3D_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("x3d", "Extensible 3D", "x3d", &ExportSceneX3D, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("fbx", "Autodesk FBX (binary)", "fbx", &ExportSceneFBX, 0));
+	exporters.push_back(Exporter::ExportFormatEntry("fbxa", "Autodesk FBX (ascii)", "fbx", &ExportSceneFBXA, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_M3D_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("m3d", "Model 3D (binary)", "m3d", &ExportSceneM3D, 0));
+	exporters.push_back(Exporter::ExportFormatEntry("m3da", "Model 3D (ascii)", "a3d", &ExportSceneM3DA, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_3MF_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("3mf", "The 3MF-File-Format", "3mf", &ExportScene3MF, 0));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_PBRT_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("pbrt", "pbrt-v4 scene description file", "pbrt", &ExportScenePbrt, aiProcess_Triangulate | aiProcess_SortByPType));
+#endif
+
+#ifndef ASSIMP_BUILD_NO_ASSJSON_EXPORTER
+	exporters.push_back(Exporter::ExportFormatEntry("assjson", "Assimp JSON Document", "json", &ExportAssimp2Json, 0));
+#endif
+}
+
+class ExporterPimpl {
+public:
+    ExporterPimpl()
+    : blob()
+    , mIOSystem(new Assimp::DefaultIOSystem())
+    , mIsDefaultIOHandler(true)
+    , mProgressHandler( nullptr )
+    , mIsDefaultProgressHandler( true )
+    , mPostProcessingSteps()
+    , mError()
+    , mExporters() {
+        GetPostProcessingStepInstanceList(mPostProcessingSteps);
+
+        // grab all built-in exporters
+		setupExporterArray(mExporters);
+    }
+
+    ~ExporterPimpl() {
+        delete blob;
+
+        // Delete all post-processing plug-ins
+        for( unsigned int a = 0; a < mPostProcessingSteps.size(); a++) {
+            delete mPostProcessingSteps[a];
+        }
+        delete mProgressHandler;
+    }
+
+public:
+    aiExportDataBlob* blob;
+    std::shared_ptr< Assimp::IOSystem > mIOSystem;
+    bool mIsDefaultIOHandler;
+
+    /** The progress handler */
+    ProgressHandler *mProgressHandler;
+    bool mIsDefaultProgressHandler;
+
+    /** Post processing steps we can apply at the imported data. */
+    std::vector< BaseProcess* > mPostProcessingSteps;
+
+    /** Last fatal export error */
+    std::string mError;
+
+    /** Exporters, this includes those registered using #Assimp::Exporter::RegisterExporter */
+    std::vector<Exporter::ExportFormatEntry> mExporters;
+};
+
+} // end of namespace Assimp
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+Exporter :: Exporter()
+: pimpl(new ExporterPimpl()) {
+    pimpl->mProgressHandler = new DefaultProgressHandler();
+}
+
+// ------------------------------------------------------------------------------------------------
+Exporter::~Exporter() {
+	ai_assert(nullptr != pimpl);
+	FreeBlob();
+    delete pimpl;
+}
+
+// ------------------------------------------------------------------------------------------------
+void Exporter::SetIOHandler( IOSystem* pIOHandler) {
+	ai_assert(nullptr != pimpl);
+	pimpl->mIsDefaultIOHandler = !pIOHandler;
+    pimpl->mIOSystem.reset(pIOHandler);
+}
+
+// ------------------------------------------------------------------------------------------------
+IOSystem* Exporter::GetIOHandler() const {
+	ai_assert(nullptr != pimpl);
+	return pimpl->mIOSystem.get();
+}
+
+// ------------------------------------------------------------------------------------------------
+bool Exporter::IsDefaultIOHandler() const {
+	ai_assert(nullptr != pimpl);
+	return pimpl->mIsDefaultIOHandler;
+}
+
+// ------------------------------------------------------------------------------------------------
+void Exporter::SetProgressHandler(ProgressHandler* pHandler) {
+    ai_assert(nullptr != pimpl);
+
+    if ( nullptr == pHandler) {
+        // Release pointer in the possession of the caller
+        pimpl->mProgressHandler = new DefaultProgressHandler();
+        pimpl->mIsDefaultProgressHandler = true;
+        return;
+    }
+
+    if (pimpl->mProgressHandler == pHandler) {
+        return;
+    }
+
+    delete pimpl->mProgressHandler;
+    pimpl->mProgressHandler = pHandler;
+    pimpl->mIsDefaultProgressHandler = false;
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiExportDataBlob* Exporter::ExportToBlob( const aiScene* pScene, const char* pFormatId,
+                                                unsigned int pPreprocessing, const ExportProperties* pProperties) {
+	ai_assert(nullptr != pimpl);
+    if (pimpl->blob) {
+        delete pimpl->blob;
+        pimpl->blob = nullptr;
+    }
+
+    auto baseName = pProperties ? pProperties->GetPropertyString(AI_CONFIG_EXPORT_BLOB_NAME, AI_BLOBIO_MAGIC) : AI_BLOBIO_MAGIC;
+
+    std::shared_ptr<IOSystem> old = pimpl->mIOSystem;
+    BlobIOSystem *blobio = new BlobIOSystem(baseName);
+    pimpl->mIOSystem = std::shared_ptr<IOSystem>( blobio );
+
+    if (AI_SUCCESS != Export(pScene,pFormatId,blobio->GetMagicFileName(), pPreprocessing, pProperties)) {
+        pimpl->mIOSystem = old;
+        return nullptr;
+    }
+
+    pimpl->blob = blobio->GetBlobChain();
+    pimpl->mIOSystem = old;
+
+    return pimpl->blob;
+}
+
+// ------------------------------------------------------------------------------------------------
+aiReturn Exporter::Export( const aiScene* pScene, const char* pFormatId, const char* pPath,
+        unsigned int pPreprocessing, const ExportProperties* pProperties) {
+    ASSIMP_BEGIN_EXCEPTION_REGION();
+	ai_assert(nullptr != pimpl);
+    // when they create scenes from scratch, users will likely create them not in verbose
+    // format. They will likely not be aware that there is a flag in the scene to indicate
+    // this, however. To avoid surprises and bug reports, we check for duplicates in
+    // meshes upfront.
+    const bool is_verbose_format = !(pScene->mFlags & AI_SCENE_FLAGS_NON_VERBOSE_FORMAT) || MakeVerboseFormatProcess::IsVerboseFormat(pScene);
+
+    pimpl->mProgressHandler->UpdateFileWrite(0, 4);
+
+    pimpl->mError = "";
+    for (size_t i = 0; i < pimpl->mExporters.size(); ++i) {
+        const Exporter::ExportFormatEntry& exp = pimpl->mExporters[i];
+        if (!strcmp(exp.mDescription.id,pFormatId)) {
+            try {
+                // Always create a full copy of the scene. We might optimize this one day,
+                // but for now it is the most pragmatic way.
+                aiScene* scenecopy_tmp = nullptr;
+                SceneCombiner::CopyScene(&scenecopy_tmp,pScene);
+
+                pimpl->mProgressHandler->UpdateFileWrite(1, 4);
+
+                std::unique_ptr<aiScene> scenecopy(scenecopy_tmp);
+                const ScenePrivateData* const priv = ScenePriv(pScene);
+
+                // steps that are not idempotent, i.e. we might need to run them again, usually to get back to the
+                // original state before the step was applied first. When checking which steps we don't need
+                // to run, those are excluded.
+                const unsigned int nonIdempotentSteps = aiProcess_FlipWindingOrder | aiProcess_FlipUVs | aiProcess_MakeLeftHanded;
+
+                // Erase all pp steps that were already applied to this scene
+                const unsigned int pp = (exp.mEnforcePP | pPreprocessing) & ~(priv && !priv->mIsCopy
+                    ? (priv->mPPStepsApplied & ~nonIdempotentSteps)
+                    : 0u);
+
+                // If no extra post-processing was specified, and we obtained this scene from an
+                // Assimp importer, apply the reverse steps automatically.
+                // TODO: either drop this, or document it. Otherwise it is just a bad surprise.
+                //if (!pPreprocessing && priv) {
+                //  pp |= (nonIdempotentSteps & priv->mPPStepsApplied);
+                //}
+
+                // If the input scene is not in verbose format, but there is at least post-processing step that relies on it,
+                // we need to run the MakeVerboseFormat step first.
+                bool must_join_again = false;
+                if (!is_verbose_format) {
+                    bool verbosify = false;
+                    for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {
+                        BaseProcess* const p = pimpl->mPostProcessingSteps[a];
+
+                        if (p->IsActive(pp) && p->RequireVerboseFormat()) {
+                            verbosify = true;
+                            break;
+                        }
+                    }
+
+                    if (verbosify || (exp.mEnforcePP & aiProcess_JoinIdenticalVertices)) {
+                        ASSIMP_LOG_DEBUG("export: Scene data not in verbose format, applying MakeVerboseFormat step first");
+
+                        MakeVerboseFormatProcess proc;
+                        proc.Execute(scenecopy.get());
+
+                        if(!(exp.mEnforcePP & aiProcess_JoinIdenticalVertices)) {
+                            must_join_again = true;
+                        }
+                    }
+                }
+
+                pimpl->mProgressHandler->UpdateFileWrite(2, 4);
+
+                if (pp) {
+                    // the three 'conversion' steps need to be executed first because all other steps rely on the standard data layout
+                    {
+                        FlipWindingOrderProcess step;
+                        if (step.IsActive(pp)) {
+                            step.Execute(scenecopy.get());
+                        }
+                    }
+
+                    {
+                        FlipUVsProcess step;
+                        if (step.IsActive(pp)) {
+                            step.Execute(scenecopy.get());
+                        }
+                    }
+
+                    {
+                        MakeLeftHandedProcess step;
+                        if (step.IsActive(pp)) {
+                            step.Execute(scenecopy.get());
+                        }
+                    }
+
+                    bool exportPointCloud(false);
+                    if (nullptr != pProperties) {
+                        exportPointCloud = pProperties->GetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS);
+                    }
+
+                    // dispatch other processes
+                    for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {
+                        BaseProcess* const p = pimpl->mPostProcessingSteps[a];
+
+                        if (p->IsActive(pp)
+                            && !dynamic_cast<FlipUVsProcess*>(p)
+                            && !dynamic_cast<FlipWindingOrderProcess*>(p)
+                            && !dynamic_cast<MakeLeftHandedProcess*>(p)) {
+                            if (dynamic_cast<PretransformVertices*>(p) && exportPointCloud) {
+                                continue;
+                            }
+                            p->Execute(scenecopy.get());
+                        }
+                    }
+                    ScenePrivateData* const privOut = ScenePriv(scenecopy.get());
+                    ai_assert(nullptr != privOut);
+
+                    privOut->mPPStepsApplied |= pp;
+                }
+
+                pimpl->mProgressHandler->UpdateFileWrite(3, 4);
+
+                if(must_join_again) {
+                    JoinVerticesProcess proc;
+                    proc.Execute(scenecopy.get());
+                }
+
+                ExportProperties emptyProperties;  // Never pass nullptr ExportProperties so Exporters don't have to worry.
+                ExportProperties* pProp = pProperties ? (ExportProperties*)pProperties : &emptyProperties;
+        		pProp->SetPropertyBool("bJoinIdenticalVertices", pp & aiProcess_JoinIdenticalVertices);
+                exp.mExportFunction(pPath,pimpl->mIOSystem.get(),scenecopy.get(), pProp);
+
+                pimpl->mProgressHandler->UpdateFileWrite(4, 4);
+            } catch (DeadlyExportError& err) {
+                pimpl->mError = err.what();
+                return AI_FAILURE;
+            }
+            return AI_SUCCESS;
+        }
+    }
+
+    pimpl->mError = std::string("Found no exporter to handle this file format: ") + pFormatId;
+    ASSIMP_END_EXCEPTION_REGION(aiReturn);
+
+    return AI_FAILURE;
+}
+
+// ------------------------------------------------------------------------------------------------
+const char* Exporter::GetErrorString() const {
+	ai_assert(nullptr != pimpl);
+    return pimpl->mError.c_str();
+}
+
+// ------------------------------------------------------------------------------------------------
+void Exporter::FreeBlob() {
+	ai_assert(nullptr != pimpl);
+    delete pimpl->blob;
+    pimpl->blob = nullptr;
+
+    pimpl->mError = "";
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiExportDataBlob* Exporter::GetBlob() const {
+	ai_assert(nullptr != pimpl);
+	return pimpl->blob;
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiExportDataBlob* Exporter::GetOrphanedBlob() const {
+	ai_assert(nullptr != pimpl);
+	const aiExportDataBlob *tmp = pimpl->blob;
+    pimpl->blob = nullptr;
+    return tmp;
+}
+
+// ------------------------------------------------------------------------------------------------
+size_t Exporter::GetExportFormatCount() const {
+	ai_assert(nullptr != pimpl);
+    return pimpl->mExporters.size();
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiExportFormatDesc* Exporter::GetExportFormatDescription( size_t index ) const {
+	ai_assert(nullptr != pimpl);
+	if (index >= GetExportFormatCount()) {
+        return nullptr;
+    }
+
+    // Return from static storage if the requested index is built-in.
+	if (index < pimpl->mExporters.size()) {
+		return &pimpl->mExporters[index].mDescription;
+    }
+
+    return &pimpl->mExporters[index].mDescription;
+}
+
+// ------------------------------------------------------------------------------------------------
+aiReturn Exporter::RegisterExporter(const ExportFormatEntry& desc) {
+	ai_assert(nullptr != pimpl);
+	for (const ExportFormatEntry &e : pimpl->mExporters) {
+        if (!strcmp(e.mDescription.id,desc.mDescription.id)) {
+            return aiReturn_FAILURE;
+        }
+    }
+
+    pimpl->mExporters.push_back(desc);
+    return aiReturn_SUCCESS;
+}
+
+// ------------------------------------------------------------------------------------------------
+void Exporter::UnregisterExporter(const char* id) {
+	ai_assert(nullptr != pimpl);
+	for (std::vector<ExportFormatEntry>::iterator it = pimpl->mExporters.begin();
+            it != pimpl->mExporters.end(); ++it) {
+        if (!strcmp((*it).mDescription.id,id)) {
+            pimpl->mExporters.erase(it);
+            break;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+ExportProperties::ExportProperties() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+ExportProperties::ExportProperties(const ExportProperties &other)
+: mIntProperties(other.mIntProperties)
+, mFloatProperties(other.mFloatProperties)
+, mStringProperties(other.mStringProperties)
+, mMatrixProperties(other.mMatrixProperties)
+, mCallbackProperties(other.mCallbackProperties){
+    // empty
+}
+
+bool ExportProperties::SetPropertyCallback(const char *szName, const std::function<void *(void *)> &f) {
+    return SetGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName, f);
+}
+
+std::function<void *(void *)> ExportProperties::GetPropertyCallback(const char *szName) const {
+    return GetGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName, 0);
+}
+
+bool ExportProperties::HasPropertyCallback(const char *szName) const {
+    return HasGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Set a configuration property
+bool ExportProperties::SetPropertyInteger(const char* szName, int iValue) {
+    return SetGenericProperty<int>(mIntProperties, szName,iValue);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Set a configuration property
+bool ExportProperties::SetPropertyFloat(const char* szName, ai_real iValue) {
+    return SetGenericProperty<ai_real>(mFloatProperties, szName,iValue);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Set a configuration property
+bool ExportProperties::SetPropertyString(const char* szName, const std::string& value) {
+    return SetGenericProperty<std::string>(mStringProperties, szName,value);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Set a configuration property
+bool ExportProperties::SetPropertyMatrix(const char* szName, const aiMatrix4x4& value) {
+    return SetGenericProperty<aiMatrix4x4>(mMatrixProperties, szName,value);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Get a configuration property
+int ExportProperties::GetPropertyInteger(const char* szName, int iErrorReturn /*= 0xffffffff*/) const {
+    return GetGenericProperty<int>(mIntProperties,szName,iErrorReturn);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Get a configuration property
+ai_real ExportProperties::GetPropertyFloat(const char* szName, ai_real iErrorReturn /*= 10e10*/) const {
+    return GetGenericProperty<ai_real>(mFloatProperties,szName,iErrorReturn);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Get a configuration property
+const std::string ExportProperties::GetPropertyString(const char* szName,
+        const std::string& iErrorReturn /*= ""*/) const {
+    return GetGenericProperty<std::string>(mStringProperties,szName,iErrorReturn);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+const aiMatrix4x4 ExportProperties::GetPropertyMatrix(const char* szName,
+        const aiMatrix4x4& iErrorReturn /*= aiMatrix4x4()*/) const {
+    return GetGenericProperty<aiMatrix4x4>(mMatrixProperties,szName,iErrorReturn);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+bool ExportProperties::HasPropertyInteger(const char* szName) const {
+    return HasGenericProperty<int>(mIntProperties, szName);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+bool ExportProperties::HasPropertyBool(const char* szName) const {
+    return HasGenericProperty<int>(mIntProperties, szName);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+bool ExportProperties::HasPropertyFloat(const char* szName) const {
+    return HasGenericProperty<ai_real>(mFloatProperties, szName);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+bool ExportProperties::HasPropertyString(const char* szName) const {
+    return HasGenericProperty<std::string>(mStringProperties, szName);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Has a configuration property
+bool ExportProperties::HasPropertyMatrix(const char* szName) const {
+    return HasGenericProperty<aiMatrix4x4>(mMatrixProperties, szName);
+}
+
+
+#endif // !ASSIMP_BUILD_NO_EXPORT