delete src/mesh/assimp-master

1 files changed, 0 insertions, 931 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/IFC/IFCLoader.cpp b/src/mesh/assimp-master/code/AssetLib/IFC/IFCLoader.cpp
deleted file mode 100644
index 0c20686..0000000
--- a/src/mesh/assimp-master/code/AssetLib/IFC/IFCLoader.cpp
+++ /dev/null
@@ -1,931 +0,0 @@
-/*
-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  IFCLoad.cpp
- *  @brief Implementation of the Industry Foundation Classes loader.
- */
-
-#ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
-
-#include <iterator>
-#include <limits>
-#include <tuple>
-
-#ifndef ASSIMP_BUILD_NO_COMPRESSED_IFC
-#ifdef ASSIMP_USE_HUNTER
-#include <minizip/unzip.h>
-#else
-#include <unzip.h>
-#endif
-#endif
-
-#include "../STEPParser/STEPFileReader.h"
-#include "IFCLoader.h"
-
-#include "IFCUtil.h"
-
-#include <assimp/MemoryIOWrapper.h>
-#include <assimp/importerdesc.h>
-#include <assimp/scene.h>
-#include <assimp/Importer.hpp>
-
-namespace Assimp {
-template <>
-const char *LogFunctions<IFCImporter>::Prefix() {
-    static auto prefix = "IFC: ";
-    return prefix;
-}
-} // namespace Assimp
-
-using namespace Assimp;
-using namespace Assimp::Formatter;
-using namespace Assimp::IFC;
-
-/* DO NOT REMOVE this comment block. The genentitylist.sh script
- * just looks for names adhering to the IfcSomething naming scheme
- * and includes all matches in the whitelist for code-generation. Thus,
- * all entity classes that are only indirectly referenced need to be
- * mentioned explicitly.
-
-  IfcRepresentationMap
-  IfcProductRepresentation
-  IfcUnitAssignment
-  IfcClosedShell
-  IfcDoor
-
- */
-
-namespace {
-
-// forward declarations
-void SetUnits(ConversionData &conv);
-void SetCoordinateSpace(ConversionData &conv);
-void ProcessSpatialStructures(ConversionData &conv);
-void MakeTreeRelative(ConversionData &conv);
-void ConvertUnit(const ::Assimp::STEP::EXPRESS::DataType &dt, ConversionData &conv);
-
-} // namespace
-
-static const aiImporterDesc desc = {
-    "Industry Foundation Classes (IFC) Importer",
-    "",
-    "",
-    "",
-    aiImporterFlags_SupportBinaryFlavour,
-    0,
-    0,
-    0,
-    0,
-    "ifc ifczip step stp"
-};
-
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by Importer
-IFCImporter::IFCImporter() {}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-IFCImporter::~IFCImporter() {
-}
-
-// ------------------------------------------------------------------------------------------------
-// Returns whether the class can handle the format of the given file.
-bool IFCImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
-    // note: this is the common identification for STEP-encoded files, so
-    // it is only unambiguous as long as we don't support any further
-    // file formats with STEP as their encoding.
-    static const char *tokens[] = { "ISO-10303-21" };
-    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
-}
-
-// ------------------------------------------------------------------------------------------------
-// List all extensions handled by this loader
-const aiImporterDesc *IFCImporter::GetInfo() const {
-    return &desc;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Setup configuration properties for the loader
-void IFCImporter::SetupProperties(const Importer *pImp) {
-    settings.skipSpaceRepresentations = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_SKIP_SPACE_REPRESENTATIONS, true);
-    settings.useCustomTriangulation = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_CUSTOM_TRIANGULATION, true);
-    settings.conicSamplingAngle = std::min(std::max((float)pImp->GetPropertyFloat(AI_CONFIG_IMPORT_IFC_SMOOTHING_ANGLE, AI_IMPORT_IFC_DEFAULT_SMOOTHING_ANGLE), 5.0f), 120.0f);
-    settings.cylindricalTessellation = std::min(std::max(pImp->GetPropertyInteger(AI_CONFIG_IMPORT_IFC_CYLINDRICAL_TESSELLATION, AI_IMPORT_IFC_DEFAULT_CYLINDRICAL_TESSELLATION), 3), 180);
-    settings.skipAnnotations = true;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Imports the given file into the given scene structure.
-void IFCImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
-    std::shared_ptr<IOStream> stream(pIOHandler->Open(pFile));
-    if (!stream) {
-        ThrowException("Could not open file for reading");
-    }
-
-    // if this is a ifczip file, decompress its contents first
-    if (GetExtension(pFile) == "ifczip") {
-#ifndef ASSIMP_BUILD_NO_COMPRESSED_IFC
-        unzFile zip = unzOpen(pFile.c_str());
-        if (zip == nullptr) {
-            ThrowException("Could not open ifczip file for reading, unzip failed");
-        }
-
-        // chop 'zip' postfix
-        std::string fileName = pFile.substr(0, pFile.length() - 3);
-
-        std::string::size_type s = pFile.find_last_of('\\');
-        if (s == std::string::npos) {
-            s = pFile.find_last_of('/');
-        }
-        if (s != std::string::npos) {
-            fileName = fileName.substr(s + 1);
-        }
-
-        // search file (same name as the IFCZIP except for the file extension) and place file pointer there
-        if (UNZ_OK == unzGoToFirstFile(zip)) {
-            do {
-                // get file size, etc.
-                unz_file_info fileInfo;
-                char filename[256];
-                unzGetCurrentFileInfo(zip, &fileInfo, filename, sizeof(filename), 0, 0, 0, 0);
-                if (GetExtension(filename) != "ifc") {
-                    continue;
-                }
-                uint8_t *buff = new uint8_t[fileInfo.uncompressed_size];
-                LogInfo("Decompressing IFCZIP file");
-                unzOpenCurrentFile(zip);
-                size_t total = 0;
-                int read = 0;
-                do {
-                    int bufferSize = fileInfo.uncompressed_size < INT16_MAX ? fileInfo.uncompressed_size : INT16_MAX;
-                    void *buffer = malloc(bufferSize);
-                    read = unzReadCurrentFile(zip, buffer, bufferSize);
-                    if (read > 0) {
-                        memcpy((char *)buff + total, buffer, read);
-                        total += read;
-                    }
-                    free(buffer);
-                } while (read > 0);
-                size_t filesize = fileInfo.uncompressed_size;
-                if (total == 0 || size_t(total) != filesize) {
-                    delete[] buff;
-                    ThrowException("Failed to decompress IFC ZIP file");
-                }
-                unzCloseCurrentFile(zip);
-                stream.reset(new MemoryIOStream(buff, fileInfo.uncompressed_size, true));
-                if (unzGoToNextFile(zip) == UNZ_END_OF_LIST_OF_FILE) {
-                    ThrowException("Found no IFC file member in IFCZIP file (1)");
-                }
-                break;
-
-            } while (true);
-        } else {
-            ThrowException("Found no IFC file member in IFCZIP file (2)");
-        }
-
-        unzClose(zip);
-#else
-        ThrowException("Could not open ifczip file for reading, assimp was built without ifczip support");
-#endif
-    }
-
-    std::unique_ptr<STEP::DB> db(STEP::ReadFileHeader(stream));
-    const STEP::HeaderInfo &head = static_cast<const STEP::DB &>(*db).GetHeader();
-
-    if (!head.fileSchema.size() || head.fileSchema.substr(0, 3) != "IFC") {
-        ThrowException("Unrecognized file schema: " + head.fileSchema);
-    }
-
-    if (!DefaultLogger::isNullLogger()) {
-        LogDebug("File schema is \'", head.fileSchema, '\'');
-        if (head.timestamp.length()) {
-            LogDebug("Timestamp \'", head.timestamp, '\'');
-        }
-        if (head.app.length()) {
-            LogDebug("Application/Exporter identline is \'", head.app, '\'');
-        }
-    }
-
-    // obtain a copy of the machine-generated IFC scheme
-    ::Assimp::STEP::EXPRESS::ConversionSchema schema;
-    Schema_2x3::GetSchema(schema);
-
-    // tell the reader which entity types to track with special care
-    static const char *const types_to_track[] = {
-        "ifcsite", "ifcbuilding", "ifcproject"
-    };
-
-    // tell the reader for which types we need to simulate STEPs reverse indices
-    static const char *const inverse_indices_to_track[] = {
-        "ifcrelcontainedinspatialstructure", "ifcrelaggregates", "ifcrelvoidselement", "ifcreldefinesbyproperties", "ifcpropertyset", "ifcstyleditem"
-    };
-
-    // feed the IFC schema into the reader and pre-parse all lines
-    STEP::ReadFile(*db, schema, types_to_track, inverse_indices_to_track);
-    const STEP::LazyObject *proj = db->GetObject("ifcproject");
-    if (!proj) {
-        ThrowException("missing IfcProject entity");
-    }
-
-    ConversionData conv(*db, proj->To<Schema_2x3::IfcProject>(), pScene, settings);
-    SetUnits(conv);
-    SetCoordinateSpace(conv);
-    ProcessSpatialStructures(conv);
-    MakeTreeRelative(conv);
-
-// NOTE - this is a stress test for the importer, but it works only
-// in a build with no entities disabled. See
-//     scripts/IFCImporter/CPPGenerator.py
-// for more information.
-#ifdef ASSIMP_IFC_TEST
-    db->EvaluateAll();
-#endif
-
-    // do final data copying
-    if (conv.meshes.size()) {
-        pScene->mNumMeshes = static_cast<unsigned int>(conv.meshes.size());
-        pScene->mMeshes = new aiMesh *[pScene->mNumMeshes]();
-        std::copy(conv.meshes.begin(), conv.meshes.end(), pScene->mMeshes);
-
-        // needed to keep the d'tor from burning us
-        conv.meshes.clear();
-    }
-
-    if (conv.materials.size()) {
-        pScene->mNumMaterials = static_cast<unsigned int>(conv.materials.size());
-        pScene->mMaterials = new aiMaterial *[pScene->mNumMaterials]();
-        std::copy(conv.materials.begin(), conv.materials.end(), pScene->mMaterials);
-
-        // needed to keep the d'tor from burning us
-        conv.materials.clear();
-    }
-
-    // apply world coordinate system (which includes the scaling to convert to meters and a -90 degrees rotation around x)
-    aiMatrix4x4 scale, rot;
-    aiMatrix4x4::Scaling(static_cast<aiVector3D>(IfcVector3(conv.len_scale)), scale);
-    aiMatrix4x4::RotationX(-AI_MATH_HALF_PI_F, rot);
-
-    pScene->mRootNode->mTransformation = rot * scale * conv.wcs * pScene->mRootNode->mTransformation;
-
-    // this must be last because objects are evaluated lazily as we process them
-    if (!DefaultLogger::isNullLogger()) {
-        LogDebug("STEP: evaluated ", db->GetEvaluatedObjectCount(), " object records");
-    }
-}
-
-namespace {
-
-// ------------------------------------------------------------------------------------------------
-void ConvertUnit(const Schema_2x3::IfcNamedUnit &unit, ConversionData &conv) {
-    if (const Schema_2x3::IfcSIUnit *const si = unit.ToPtr<Schema_2x3::IfcSIUnit>()) {
-        if (si->UnitType == "LENGTHUNIT") {
-            conv.len_scale = si->Prefix ? ConvertSIPrefix(si->Prefix) : 1.f;
-            IFCImporter::LogDebug("got units used for lengths");
-        }
-        if (si->UnitType == "PLANEANGLEUNIT") {
-            if (si->Name != "RADIAN") {
-                IFCImporter::LogWarn("expected base unit for angles to be radian");
-            }
-        }
-    } else if (const Schema_2x3::IfcConversionBasedUnit *const convu = unit.ToPtr<Schema_2x3::IfcConversionBasedUnit>()) {
-        if (convu->UnitType == "PLANEANGLEUNIT") {
-            try {
-                conv.angle_scale = convu->ConversionFactor->ValueComponent->To<::Assimp::STEP::EXPRESS::REAL>();
-                ConvertUnit(*convu->ConversionFactor->UnitComponent, conv);
-                IFCImporter::LogDebug("got units used for angles");
-            } catch (std::bad_cast &) {
-                IFCImporter::LogError("skipping unknown IfcConversionBasedUnit.ValueComponent entry - expected REAL");
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void ConvertUnit(const ::Assimp::STEP::EXPRESS::DataType &dt, ConversionData &conv) {
-    try {
-        const ::Assimp::STEP::EXPRESS::ENTITY &e = dt.To<::Assimp::STEP::EXPRESS::ENTITY>();
-
-        const Schema_2x3::IfcNamedUnit &unit = e.ResolveSelect<Schema_2x3::IfcNamedUnit>(conv.db);
-        if (unit.UnitType != "LENGTHUNIT" && unit.UnitType != "PLANEANGLEUNIT") {
-            return;
-        }
-
-        ConvertUnit(unit, conv);
-    } catch (std::bad_cast &) {
-        // not entity, somehow
-        IFCImporter::LogError("skipping unknown IfcUnit entry - expected entity");
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void SetUnits(ConversionData &conv) {
-    // see if we can determine the coordinate space used to express.
-    for (size_t i = 0; i < conv.proj.UnitsInContext->Units.size(); ++i) {
-        ConvertUnit(*conv.proj.UnitsInContext->Units[i], conv);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void SetCoordinateSpace(ConversionData &conv) {
-    const Schema_2x3::IfcRepresentationContext *fav = nullptr;
-    for (const Schema_2x3::IfcRepresentationContext &v : conv.proj.RepresentationContexts) {
-        fav = &v;
-        // Model should be the most suitable type of context, hence ignore the others
-        if (v.ContextType && v.ContextType.Get() == "Model") {
-            break;
-        }
-    }
-    if (fav) {
-        if (const Schema_2x3::IfcGeometricRepresentationContext *const geo = fav->ToPtr<Schema_2x3::IfcGeometricRepresentationContext>()) {
-            ConvertAxisPlacement(conv.wcs, *geo->WorldCoordinateSystem, conv);
-            IFCImporter::LogDebug("got world coordinate system");
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void ResolveObjectPlacement(aiMatrix4x4 &m, const Schema_2x3::IfcObjectPlacement &place, ConversionData &conv) {
-    if (const Schema_2x3::IfcLocalPlacement *const local = place.ToPtr<Schema_2x3::IfcLocalPlacement>()) {
-        IfcMatrix4 tmp;
-        ConvertAxisPlacement(tmp, *local->RelativePlacement, conv);
-
-        m = static_cast<aiMatrix4x4>(tmp);
-
-        if (local->PlacementRelTo) {
-            aiMatrix4x4 tmpM;
-            ResolveObjectPlacement(tmpM, local->PlacementRelTo.Get(), conv);
-            m = tmpM * m;
-        }
-    } else {
-        IFCImporter::LogWarn("skipping unknown IfcObjectPlacement entity, type is ", place.GetClassName());
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-bool ProcessMappedItem(const Schema_2x3::IfcMappedItem &mapped, aiNode *nd_src, std::vector<aiNode *> &subnodes_src, unsigned int matid, ConversionData &conv) {
-    // insert a custom node here, the carthesian transform operator is simply a conventional transformation matrix
-    std::unique_ptr<aiNode> nd(new aiNode());
-    nd->mName.Set("IfcMappedItem");
-
-    // handle the Cartesian operator
-    IfcMatrix4 m;
-    ConvertTransformOperator(m, *mapped.MappingTarget);
-
-    IfcMatrix4 msrc;
-    ConvertAxisPlacement(msrc, *mapped.MappingSource->MappingOrigin, conv);
-
-    msrc = m * msrc;
-
-    std::set<unsigned int> meshes;
-    const size_t old_openings = conv.collect_openings ? conv.collect_openings->size() : 0;
-    if (conv.apply_openings) {
-        IfcMatrix4 minv = msrc;
-        minv.Inverse();
-        for (TempOpening &open : *conv.apply_openings) {
-            open.Transform(minv);
-        }
-    }
-
-    unsigned int localmatid = ProcessMaterials(mapped.GetID(), matid, conv, false);
-    const Schema_2x3::IfcRepresentation &repr = mapped.MappingSource->MappedRepresentation;
-
-    bool got = false;
-    for (const Schema_2x3::IfcRepresentationItem &item : repr.Items) {
-        if (!ProcessRepresentationItem(item, localmatid, meshes, conv)) {
-            IFCImporter::LogWarn("skipping mapped entity of type ", item.GetClassName(), ", no representations could be generated");
-        } else
-            got = true;
-    }
-
-    if (!got) {
-        return false;
-    }
-
-    AssignAddedMeshes(meshes, nd.get(), conv);
-    if (conv.collect_openings) {
-
-        // if this pass serves us only to collect opening geometry,
-        // make sure we transform the TempMesh's which we need to
-        // preserve as well.
-        if (const size_t diff = conv.collect_openings->size() - old_openings) {
-            for (size_t i = 0; i < diff; ++i) {
-                (*conv.collect_openings)[old_openings + i].Transform(msrc);
-            }
-        }
-    }
-
-    nd->mTransformation = nd_src->mTransformation * static_cast<aiMatrix4x4>(msrc);
-    subnodes_src.push_back(nd.release());
-
-    return true;
-}
-
-// ------------------------------------------------------------------------------------------------
-struct RateRepresentationPredicate {
-    int Rate(const Schema_2x3::IfcRepresentation *r) const {
-        // the smaller, the better
-
-        if (!r->RepresentationIdentifier) {
-            // neutral choice if no extra information is specified
-            return 0;
-        }
-
-        const std::string &name = r->RepresentationIdentifier.Get();
-        if (name == "MappedRepresentation") {
-            if (!r->Items.empty()) {
-                // take the first item and base our choice on it
-                const Schema_2x3::IfcMappedItem *const m = r->Items.front()->ToPtr<Schema_2x3::IfcMappedItem>();
-                if (m) {
-                    return Rate(m->MappingSource->MappedRepresentation);
-                }
-            }
-            return 100;
-        }
-
-        return Rate(name);
-    }
-
-    int Rate(const std::string &r) const {
-        if (r == "SolidModel") {
-            return -3;
-        }
-
-        // give strong preference to extruded geometry.
-        if (r == "SweptSolid") {
-            return -10;
-        }
-
-        if (r == "Clipping") {
-            return -5;
-        }
-
-        // 'Brep' is difficult to get right due to possible voids in the
-        // polygon boundaries, so take it only if we are forced to (i.e.
-        // if the only alternative is (non-clipping) boolean operations,
-        // which are not supported at all).
-        if (r == "Brep") {
-            return -2;
-        }
-
-        // Curves, bounding boxes - those will most likely not be loaded
-        // as we can't make any use out of this data. So consider them
-        // last.
-        if (r == "BoundingBox" || r == "Curve2D") {
-            return 100;
-        }
-        return 0;
-    }
-
-    bool operator()(const Schema_2x3::IfcRepresentation *a, const Schema_2x3::IfcRepresentation *b) const {
-        return Rate(a) < Rate(b);
-    }
-};
-
-// ------------------------------------------------------------------------------------------------
-void ProcessProductRepresentation(const Schema_2x3::IfcProduct &el, aiNode *nd, std::vector<aiNode *> &subnodes, ConversionData &conv) {
-    if (!el.Representation) {
-        return;
-    }
-
-    // extract Color from metadata, if present
-    unsigned int matid = ProcessMaterials(el.GetID(), std::numeric_limits<uint32_t>::max(), conv, false);
-    std::set<unsigned int> meshes;
-
-    // we want only one representation type, so bring them in a suitable order (i.e try those
-    // that look as if we could read them quickly at first). This way of reading
-    // representation is relatively generic and allows the concrete implementations
-    // for the different representation types to make some sensible choices what
-    // to load and what not to load.
-    const STEP::ListOf<STEP::Lazy<Schema_2x3::IfcRepresentation>, 1, 0> &src = el.Representation.Get()->Representations;
-    std::vector<const Schema_2x3::IfcRepresentation *> repr_ordered(src.size());
-    std::copy(src.begin(), src.end(), repr_ordered.begin());
-    std::sort(repr_ordered.begin(), repr_ordered.end(), RateRepresentationPredicate());
-    for (const Schema_2x3::IfcRepresentation *repr : repr_ordered) {
-        bool res = false;
-        for (const Schema_2x3::IfcRepresentationItem &item : repr->Items) {
-            if (const Schema_2x3::IfcMappedItem *const geo = item.ToPtr<Schema_2x3::IfcMappedItem>()) {
-                res = ProcessMappedItem(*geo, nd, subnodes, matid, conv) || res;
-            } else {
-                res = ProcessRepresentationItem(item, matid, meshes, conv) || res;
-            }
-        }
-        // if we got something meaningful at this point, skip any further representations
-        if (res) {
-            break;
-        }
-    }
-    AssignAddedMeshes(meshes, nd, conv);
-}
-
-typedef std::map<std::string, std::string> Metadata;
-
-// ------------------------------------------------------------------------------------------------
-void ProcessMetadata(const Schema_2x3::ListOf<Schema_2x3::Lazy<Schema_2x3::IfcProperty>, 1, 0> &set, ConversionData &conv, Metadata &properties,
-        const std::string &prefix = std::string(),
-        unsigned int nest = 0) {
-    for (const Schema_2x3::IfcProperty &property : set) {
-        const std::string &key = prefix.length() > 0 ? (prefix + "." + property.Name) : property.Name;
-        if (const Schema_2x3::IfcPropertySingleValue *const singleValue = property.ToPtr<Schema_2x3::IfcPropertySingleValue>()) {
-            if (singleValue->NominalValue) {
-                if (const ::Assimp::STEP::EXPRESS::STRING *str = singleValue->NominalValue.Get()->ToPtr<::Assimp::STEP::EXPRESS::STRING>()) {
-                    std::string value = static_cast<std::string>(*str);
-                    properties[key] = value;
-                } else if (const ::Assimp::STEP::EXPRESS::REAL *val1 = singleValue->NominalValue.Get()->ToPtr<::Assimp::STEP::EXPRESS::REAL>()) {
-                    float value = static_cast<float>(*val1);
-                    std::stringstream s;
-                    s << value;
-                    properties[key] = s.str();
-                } else if (const ::Assimp::STEP::EXPRESS::INTEGER *val2 = singleValue->NominalValue.Get()->ToPtr<::Assimp::STEP::EXPRESS::INTEGER>()) {
-                    int64_t curValue = static_cast<int64_t>(*val2);
-                    std::stringstream s;
-                    s << curValue;
-                    properties[key] = s.str();
-                }
-            }
-        } else if (const Schema_2x3::IfcPropertyListValue *const listValue = property.ToPtr<Schema_2x3::IfcPropertyListValue>()) {
-            std::stringstream ss;
-            ss << "[";
-            unsigned index = 0;
-            for (const Schema_2x3::IfcValue::Out &v : listValue->ListValues) {
-                if (!v) continue;
-                if (const ::Assimp::STEP::EXPRESS::STRING *str = v->ToPtr<::Assimp::STEP::EXPRESS::STRING>()) {
-                    std::string value = static_cast<std::string>(*str);
-                    ss << "'" << value << "'";
-                } else if (const ::Assimp::STEP::EXPRESS::REAL *val1 = v->ToPtr<::Assimp::STEP::EXPRESS::REAL>()) {
-                    float value = static_cast<float>(*val1);
-                    ss << value;
-                } else if (const ::Assimp::STEP::EXPRESS::INTEGER *val2 = v->ToPtr<::Assimp::STEP::EXPRESS::INTEGER>()) {
-                    int64_t value = static_cast<int64_t>(*val2);
-                    ss << value;
-                }
-                if (index + 1 < listValue->ListValues.size()) {
-                    ss << ",";
-                }
-                index++;
-            }
-            ss << "]";
-            properties[key] = ss.str();
-        } else if (const Schema_2x3::IfcComplexProperty *const complexProp = property.ToPtr<Schema_2x3::IfcComplexProperty>()) {
-            if (nest > 2) { // mostly arbitrary limit to prevent stack overflow vulnerabilities
-                IFCImporter::LogError("maximum nesting level for IfcComplexProperty reached, skipping this property.");
-            } else {
-                ProcessMetadata(complexProp->HasProperties, conv, properties, key, nest + 1);
-            }
-        } else {
-            properties[key] = std::string();
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void ProcessMetadata(uint64_t relDefinesByPropertiesID, ConversionData &conv, Metadata &properties) {
-    if (const Schema_2x3::IfcRelDefinesByProperties *const pset = conv.db.GetObject(relDefinesByPropertiesID)->ToPtr<Schema_2x3::IfcRelDefinesByProperties>()) {
-        if (const Schema_2x3::IfcPropertySet *const set = conv.db.GetObject(pset->RelatingPropertyDefinition->GetID())->ToPtr<Schema_2x3::IfcPropertySet>()) {
-            ProcessMetadata(set->HasProperties, conv, properties);
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-aiNode *ProcessSpatialStructure(aiNode *parent, const Schema_2x3::IfcProduct &el, ConversionData &conv,
-        std::vector<TempOpening> *collect_openings = nullptr) {
-    const STEP::DB::RefMap &refs = conv.db.GetRefs();
-
-    // skip over space and annotation nodes - usually, these have no meaning in Assimp's context
-    bool skipGeometry = false;
-    if (conv.settings.skipSpaceRepresentations) {
-        if (el.ToPtr<Schema_2x3::IfcSpace>()) {
-            IFCImporter::LogVerboseDebug("skipping IfcSpace entity due to importer settings");
-            skipGeometry = true;
-        }
-    }
-
-    if (conv.settings.skipAnnotations) {
-        if (el.ToPtr<Schema_2x3::IfcAnnotation>()) {
-            IFCImporter::LogVerboseDebug("skipping IfcAnnotation entity due to importer settings");
-            return nullptr;
-        }
-    }
-
-    // add an output node for this spatial structure
-    aiNode *nd(new aiNode);
-    nd->mName.Set(el.GetClassName() + "_" + (el.Name ? el.Name.Get() : "Unnamed") + "_" + el.GlobalId);
-    nd->mParent = parent;
-
-    conv.already_processed.insert(el.GetID());
-
-    // check for node metadata
-    STEP::DB::RefMapRange children = refs.equal_range(el.GetID());
-    if (children.first != refs.end()) {
-        Metadata properties;
-        if (children.first == children.second) {
-            // handles single property set
-            ProcessMetadata((*children.first).second, conv, properties);
-        } else {
-            // handles multiple property sets (currently all property sets are merged,
-            // which may not be the best solution in the long run)
-            for (STEP::DB::RefMap::const_iterator it = children.first; it != children.second; ++it) {
-                ProcessMetadata((*it).second, conv, properties);
-            }
-        }
-
-        if (!properties.empty()) {
-            aiMetadata *data = aiMetadata::Alloc(static_cast<unsigned int>(properties.size()));
-            unsigned int index(0);
-            for (const Metadata::value_type &kv : properties) {
-                data->Set(index++, kv.first, aiString(kv.second));
-            }
-            nd->mMetaData = data;
-        }
-    }
-
-    if (el.ObjectPlacement) {
-        ResolveObjectPlacement(nd->mTransformation, el.ObjectPlacement.Get(), conv);
-    }
-
-    std::vector<TempOpening> openings;
-
-    IfcMatrix4 myInv;
-    bool didinv = false;
-
-    // convert everything contained directly within this structure,
-    // this may result in more nodes.
-    std::vector<aiNode *> subnodes;
-    try {
-        // locate aggregates and 'contained-in-here'-elements of this spatial structure and add them in recursively
-        // on our way, collect openings in *this* element
-        STEP::DB::RefMapRange range = refs.equal_range(el.GetID());
-
-        for (STEP::DB::RefMapRange range2 = range; range2.first != range.second; ++range2.first) {
-            // skip over meshes that have already been processed before. This is strictly necessary
-            // because the reverse indices also include references contained in argument lists and
-            // therefore every element has a back-reference hold by its parent.
-            if (conv.already_processed.find((*range2.first).second) != conv.already_processed.end()) {
-                continue;
-            }
-            const STEP::LazyObject &obj = conv.db.MustGetObject((*range2.first).second);
-
-            // handle regularly-contained elements
-            if (const Schema_2x3::IfcRelContainedInSpatialStructure *const cont = obj->ToPtr<Schema_2x3::IfcRelContainedInSpatialStructure>()) {
-                if (cont->RelatingStructure->GetID() != el.GetID()) {
-                    continue;
-                }
-                for (const Schema_2x3::IfcProduct &pro : cont->RelatedElements) {
-                    if (pro.ToPtr<Schema_2x3::IfcOpeningElement>()) {
-                        // IfcOpeningElement is handled below. Sadly we can't use it here as is:
-                        // The docs say that opening elements are USUALLY attached to building storey,
-                        // but we want them for the building elements to which they belong.
-                        continue;
-                    }
-
-                    aiNode *const ndnew = ProcessSpatialStructure(nd, pro, conv, nullptr);
-                    if (ndnew) {
-                        subnodes.push_back(ndnew);
-                    }
-                }
-            }
-            // handle openings, which we collect in a list rather than adding them to the node graph
-            else if (const Schema_2x3::IfcRelVoidsElement *const fills = obj->ToPtr<Schema_2x3::IfcRelVoidsElement>()) {
-                if (fills->RelatingBuildingElement->GetID() == el.GetID()) {
-                    const Schema_2x3::IfcFeatureElementSubtraction &open = fills->RelatedOpeningElement;
-
-                    // move opening elements to a separate node since they are semantically different than elements that are just 'contained'
-                    std::unique_ptr<aiNode> nd_aggr(new aiNode());
-                    nd_aggr->mName.Set("$RelVoidsElement");
-                    nd_aggr->mParent = nd;
-
-                    nd_aggr->mTransformation = nd->mTransformation;
-
-                    std::vector<TempOpening> openings_local;
-                    aiNode *const ndnew = ProcessSpatialStructure(nd_aggr.get(), open, conv, &openings_local);
-                    if (ndnew) {
-
-                        nd_aggr->mNumChildren = 1;
-                        nd_aggr->mChildren = new aiNode *[1]();
-
-                        nd_aggr->mChildren[0] = ndnew;
-
-                        if (openings_local.size()) {
-                            if (!didinv) {
-                                myInv = aiMatrix4x4(nd->mTransformation).Inverse();
-                                didinv = true;
-                            }
-
-                            // we need all openings to be in the local space of *this* node, so transform them
-                            for (TempOpening &op : openings_local) {
-                                op.Transform(myInv * nd_aggr->mChildren[0]->mTransformation);
-                                openings.push_back(op);
-                            }
-                        }
-                        subnodes.push_back(nd_aggr.release());
-                    }
-                }
-            }
-        }
-
-        for (; range.first != range.second; ++range.first) {
-            // see note in loop above
-            if (conv.already_processed.find((*range.first).second) != conv.already_processed.end()) {
-                continue;
-            }
-            if (const Schema_2x3::IfcRelAggregates *const aggr = conv.db.GetObject((*range.first).second)->ToPtr<Schema_2x3::IfcRelAggregates>()) {
-                if (aggr->RelatingObject->GetID() != el.GetID()) {
-                    continue;
-                }
-
-                // move aggregate elements to a separate node since they are semantically different than elements that are just 'contained'
-                std::unique_ptr<aiNode> nd_aggr(new aiNode());
-                nd_aggr->mName.Set("$RelAggregates");
-                nd_aggr->mParent = nd;
-
-                nd_aggr->mTransformation = nd->mTransformation;
-
-                nd_aggr->mChildren = new aiNode *[aggr->RelatedObjects.size()]();
-                for (const Schema_2x3::IfcObjectDefinition &def : aggr->RelatedObjects) {
-                    if (const Schema_2x3::IfcProduct *const prod = def.ToPtr<Schema_2x3::IfcProduct>()) {
-
-                        aiNode *const ndnew = ProcessSpatialStructure(nd_aggr.get(), *prod, conv, nullptr);
-                        if (ndnew) {
-                            nd_aggr->mChildren[nd_aggr->mNumChildren++] = ndnew;
-                        }
-                    }
-                }
-
-                subnodes.push_back(nd_aggr.release());
-            }
-        }
-
-        conv.collect_openings = collect_openings;
-        if (!conv.collect_openings) {
-            conv.apply_openings = &openings;
-        }
-
-        if (!skipGeometry) {
-            ProcessProductRepresentation(el, nd, subnodes, conv);
-            conv.apply_openings = conv.collect_openings = nullptr;
-        }
-
-        if (subnodes.size()) {
-            nd->mChildren = new aiNode *[subnodes.size()]();
-            for (aiNode *nd2 : subnodes) {
-                nd->mChildren[nd->mNumChildren++] = nd2;
-                nd2->mParent = nd;
-            }
-        }
-    } catch (...) {
-        // it hurts, but I don't want to pull boost::ptr_vector into -noboost only for these few spots here
-        std::for_each(subnodes.begin(), subnodes.end(), delete_fun<aiNode>());
-        throw;
-    }
-
-    ai_assert(conv.already_processed.find(el.GetID()) != conv.already_processed.end());
-    conv.already_processed.erase(conv.already_processed.find(el.GetID()));
-    return nd;
-}
-
-// ------------------------------------------------------------------------------------------------
-void ProcessSpatialStructures(ConversionData &conv) {
-    // XXX add support for multiple sites (i.e. IfcSpatialStructureElements with composition == COMPLEX)
-
-    // process all products in the file. it is reasonable to assume that a
-    // file that is relevant for us contains at least a site or a building.
-    const STEP::DB::ObjectMapByType &map = conv.db.GetObjectsByType();
-
-    ai_assert(map.find("ifcsite") != map.end());
-    const STEP::DB::ObjectSet *range = &map.find("ifcsite")->second;
-
-    if (range->empty()) {
-        ai_assert(map.find("ifcbuilding") != map.end());
-        range = &map.find("ifcbuilding")->second;
-        if (range->empty()) {
-            // no site, no building -  fail;
-            IFCImporter::ThrowException("no root element found (expected IfcBuilding or preferably IfcSite)");
-        }
-    }
-
-    std::vector<aiNode *> nodes;
-
-    for (const STEP::LazyObject *lz : *range) {
-        const Schema_2x3::IfcSpatialStructureElement *const prod = lz->ToPtr<Schema_2x3::IfcSpatialStructureElement>();
-        if (!prod) {
-            continue;
-        }
-        IFCImporter::LogVerboseDebug("looking at spatial structure `", (prod->Name ? prod->Name.Get() : "unnamed"), "`", (prod->ObjectType ? " which is of type " + prod->ObjectType.Get() : ""));
-
-        // the primary sites are referenced by an IFCRELAGGREGATES element which assigns them to the IFCPRODUCT
-        const STEP::DB::RefMap &refs = conv.db.GetRefs();
-        STEP::DB::RefMapRange ref_range = refs.equal_range(conv.proj.GetID());
-        for (; ref_range.first != ref_range.second; ++ref_range.first) {
-            if (const Schema_2x3::IfcRelAggregates *const aggr = conv.db.GetObject((*ref_range.first).second)->ToPtr<Schema_2x3::IfcRelAggregates>()) {
-
-                for (const Schema_2x3::IfcObjectDefinition &def : aggr->RelatedObjects) {
-                    // comparing pointer values is not sufficient, we would need to cast them to the same type first
-                    // as there is multiple inheritance in the game.
-                    if (def.GetID() == prod->GetID()) {
-                        IFCImporter::LogVerboseDebug("selecting this spatial structure as root structure");
-                        // got it, this is one primary site.
-                        nodes.push_back(ProcessSpatialStructure(nullptr, *prod, conv, nullptr));
-                    }
-                }
-            }
-        }
-    }
-
-    size_t nb_nodes = nodes.size();
-
-    if (nb_nodes == 0) {
-        IFCImporter::LogWarn("failed to determine primary site element, taking all the IfcSite");
-        for (const STEP::LazyObject *lz : *range) {
-            const Schema_2x3::IfcSpatialStructureElement *const prod = lz->ToPtr<Schema_2x3::IfcSpatialStructureElement>();
-            if (!prod) {
-                continue;
-            }
-
-            nodes.push_back(ProcessSpatialStructure(nullptr, *prod, conv, nullptr));
-        }
-
-        nb_nodes = nodes.size();
-    }
-
-    if (nb_nodes == 1) {
-        conv.out->mRootNode = nodes[0];
-    } else if (nb_nodes > 1) {
-        conv.out->mRootNode = new aiNode("Root");
-        conv.out->mRootNode->mParent = nullptr;
-        conv.out->mRootNode->mNumChildren = static_cast<unsigned int>(nb_nodes);
-        conv.out->mRootNode->mChildren = new aiNode *[conv.out->mRootNode->mNumChildren];
-
-        for (size_t i = 0; i < nb_nodes; ++i) {
-            aiNode *node = nodes[i];
-
-            node->mParent = conv.out->mRootNode;
-
-            conv.out->mRootNode->mChildren[i] = node;
-        }
-    } else {
-        IFCImporter::ThrowException("failed to determine primary site element");
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void MakeTreeRelative(aiNode *start, const aiMatrix4x4 &combined) {
-    // combined is the parent's absolute transformation matrix
-    const aiMatrix4x4 old = start->mTransformation;
-
-    if (!combined.IsIdentity()) {
-        start->mTransformation = aiMatrix4x4(combined).Inverse() * start->mTransformation;
-    }
-
-    // All nodes store absolute transformations right now, so we need to make them relative
-    for (unsigned int i = 0; i < start->mNumChildren; ++i) {
-        MakeTreeRelative(start->mChildren[i], old);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void MakeTreeRelative(ConversionData &conv) {
-    MakeTreeRelative(conv.out->mRootNode, IfcMatrix4());
-}
-
-} // namespace
-
-#endif