Function ProcessMappedItem

code/AssetLib/IFC/IFCLoader.cpp:403–459

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// ------------------------------------------------------------------------------------------------
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;
}