Esempio n. 1
0
void ParametersDialog::on_compute_clicked()
{
    const Mesh::MeshObject& kernel = myMesh->Mesh.getValue();
    if (kernel.hasSelectedFacets()) {
        std::vector<unsigned long> facets, points;
        kernel.getFacetsFromSelection(facets);
        points = kernel.getPointsFromFacets(facets);
        MeshCore::MeshPointArray coords = kernel.getKernel().GetPoints(points);

        // Copy points into right format
        FitParameter::Points fitpts;
        fitpts.insert(fitpts.end(), coords.begin(), coords.end());
        coords.clear();

        values = fitParameter->getParameter(fitpts);
        if (values.size() == spinBoxes.size()) {
            for (std::size_t i=0; i<values.size(); i++) {
                spinBoxes[i]->setValue(values[i]);
            }
        }
        meshSel.stopSelection();
        meshSel.clearSelection();
    }
    else {
        QMessageBox::warning(this, tr("No selection"), tr("Before fitting the surface select an area."));
    }
}
Esempio n. 2
0
void MeshConversion::convert(const pcl::PolygonMesh& pclMesh, Mesh::MeshObject& meshObject)
{
    // number of points
    size_t nr_points  = pclMesh.cloud.width * pclMesh.cloud.height;
    size_t point_size = pclMesh.cloud.data.size () / nr_points;
    // number of faces for header
    size_t nr_faces = pclMesh.polygons.size ();

    MeshCore::MeshPointArray points;
    points.reserve(nr_points);
    MeshCore::MeshFacetArray facets;
    facets.reserve(nr_faces);

    // get vertices
    MeshCore::MeshPoint vertex;
    for (size_t i = 0; i < nr_points; ++i) {
        int xyz = 0;
        for (size_t d = 0; d < pclMesh.cloud.fields.size(); ++d) {
            int c = 0;
            // adding vertex
            if ((pclMesh.cloud.fields[d].datatype ==
#if PCL_VERSION_COMPARE(>,1,6,0)
                 pcl::PCLPointField::FLOAT32) &&
#else
                 sensor_msgs::PointField::FLOAT32) &&
#endif
                (pclMesh.cloud.fields[d].name == "x" ||
                 pclMesh.cloud.fields[d].name == "y" ||
                 pclMesh.cloud.fields[d].name == "z"))
            {
                float value;
                memcpy (&value, &pclMesh.cloud.data[i * point_size + pclMesh.cloud.fields[d].offset + c * sizeof (float)], sizeof (float));
                vertex[xyz] = value;
                if (++xyz == 3) {
                    points.push_back(vertex);
                    break;
                }
            }
        }
    }
    // get faces
    MeshCore::MeshFacet face;
    for (size_t i = 0; i < nr_faces; i++) {
        face._aulPoints[0] = pclMesh.polygons[i].vertices[0];
        face._aulPoints[1] = pclMesh.polygons[i].vertices[1];
        face._aulPoints[2] = pclMesh.polygons[i].vertices[2];
        facets.push_back(face);
    }

    MeshCore::MeshKernel kernel;
    kernel.Adopt(points, facets, true);
    meshObject.swap(kernel);
    meshObject.harmonizeNormals();
}
Esempio n. 3
0
static PyObject * 
calculateEigenTransform(PyObject *self, PyObject *args)
{
    PyObject *input;

    if (!PyArg_ParseTuple(args, "O",&input))
        return NULL;

    if(! PySequence_Check(input) ){
        PyErr_SetString(Base::BaseExceptionFreeCADError, "Input have to be a sequence of Base.Vector()");
        return NULL;
    }

    PY_TRY {
        MeshCore::MeshKernel aMesh;
        MeshCore::MeshPointArray vertices;
        vertices.clear();
        MeshCore::MeshFacetArray faces;
        faces.clear();
        MeshCore::MeshPoint current_node;

        Py::Sequence list(input);
        for (Py::Sequence::iterator it = list.begin(); it != list.end(); ++it) {
            PyObject* value = (*it).ptr();
            if (PyObject_TypeCheck(value, &(Base::VectorPy::Type))) {
                Base::VectorPy  *pcObject = static_cast<Base::VectorPy*>(value);
                Base::Vector3d* val = pcObject->getVectorPtr();


			    current_node.Set(float(val->x),float(val->y),float(val->z));
			    vertices.push_back(current_node);
            }
		}

		MeshCore::MeshFacet aFacet;
		aFacet._aulPoints[0] = 0;aFacet._aulPoints[1] = 1;aFacet._aulPoints[2] = 2;
		faces.push_back(aFacet);
		//Fill the Kernel with the temp smesh structure and delete the current containers
		aMesh.Adopt(vertices,faces);
		MeshCore::MeshEigensystem pca(aMesh);
		pca.Evaluate();
		Base::Matrix4D Trafo = pca.Transform();

        return new Base::PlacementPy(new Base::Placement(Trafo) );

	} PY_CATCH;

	Py_Return;
}
Esempio n. 4
0
Mesh::MeshObject* Mesher::createMesh() const
{
    // OCC standard mesher
    if (method == Standard) {
        Handle_StlMesh_Mesh aMesh = new StlMesh_Mesh();

        if (!shape.IsNull()) {
            BRepTools::Clean(shape);
#if OCC_VERSION_HEX >= 0x060801
            BRepMesh_IncrementalMesh bMesh(shape, deflection, Standard_False, angularDeflection);
            StlTransfer::RetrieveMesh(shape,aMesh);
#else
            StlTransfer::BuildIncrementalMesh(shape, deflection,
#if OCC_VERSION_HEX >= 0x060503
                Standard_True,
#endif
                aMesh);
#endif
        }

        std::map<uint32_t, std::vector<std::size_t> > colorMap;
        for (std::size_t i=0; i<colors.size(); i++) {
            colorMap[colors[i]].push_back(i);
        }

        bool createSegm = (static_cast<int>(colors.size()) == aMesh->NbDomains());

        MeshCore::MeshFacetArray faces;
        faces.reserve(aMesh->NbTriangles());

        std::set<Vertex> vertices;
        Standard_Real x1, y1, z1;
        Standard_Real x2, y2, z2;
        Standard_Real x3, y3, z3;

        std::vector< std::vector<unsigned long> > meshSegments;
        std::size_t numMeshFaces = 0;
        StlMesh_MeshExplorer xp(aMesh);
        for (Standard_Integer nbd=1;nbd<=aMesh->NbDomains();nbd++) {
            std::size_t numDomainFaces = 0;
            for (xp.InitTriangle(nbd); xp.MoreTriangle(); xp.NextTriangle()) {
                xp.TriangleVertices(x1,y1,z1,x2,y2,z2,x3,y3,z3);
                std::set<Vertex>::iterator it;
                MeshCore::MeshFacet face;

                // 1st vertex
                Vertex v1(x1,y1,z1);
                it = vertices.find(v1);
                if (it == vertices.end()) {
                    v1.i = vertices.size();
                    face._aulPoints[0] = v1.i;
                    vertices.insert(v1);
                }
                else {
                    face._aulPoints[0] = it->i;
                }

                // 2nd vertex
                Vertex v2(x2,y2,z2);
                it = vertices.find(v2);
                if (it == vertices.end()) {
                    v2.i = vertices.size();
                    face._aulPoints[1] = v2.i;
                    vertices.insert(v2);
                }
                else {
                    face._aulPoints[1] = it->i;
                }

                // 3rd vertex
                Vertex v3(x3,y3,z3);
                it = vertices.find(v3);
                if (it == vertices.end()) {
                    v3.i = vertices.size();
                    face._aulPoints[2] = v3.i;
                    vertices.insert(v3);
                }
                else {
                    face._aulPoints[2] = it->i;
                }

                // make sure that we don't insert invalid facets
                if (face._aulPoints[0] != face._aulPoints[1] &&
                    face._aulPoints[1] != face._aulPoints[2] &&
                    face._aulPoints[2] != face._aulPoints[0]) {
                    faces.push_back(face);
                    numDomainFaces++;
                }
            }

            // add a segment for the face
            if (createSegm || this->segments) {
                std::vector<unsigned long> segment(numDomainFaces);
                std::generate(segment.begin(), segment.end(), Base::iotaGen<unsigned long>(numMeshFaces));
                numMeshFaces += numDomainFaces;
                meshSegments.push_back(segment);
            }
        }

        MeshCore::MeshPointArray verts;
        verts.resize(vertices.size());
        for (auto it : vertices)
            verts[it.i] = it.toPoint();

        MeshCore::MeshKernel kernel;
        kernel.Adopt(verts, faces, true);

        Mesh::MeshObject* meshdata = new Mesh::MeshObject();
        meshdata->swap(kernel);
        if (createSegm) {
            int index = 0;
            for (auto it : colorMap) {
                Mesh::Segment segm(meshdata, false);
                for (auto jt : it.second) {
                    segm.addIndices(meshSegments[jt]);
                }
                segm.save(true);
                std::stringstream str;
                str << "patch" << index++;
                segm.setName(str.str());
                meshdata->addSegment(segm);
            }
        }
        else {
            for (auto it : meshSegments) {
                meshdata->addSegment(it);
            }
        }
        return meshdata;
    }

#ifndef HAVE_SMESH
    throw Base::Exception("SMESH is not available on this platform");
#else
    std::list<SMESH_Hypothesis*> hypoth;

    SMESH_Gen* meshgen = SMESH_Gen::get();
    SMESH_Mesh* mesh = meshgen->CreateMesh(0, true);
    int hyp=0;

    switch (method) {
#if defined (HAVE_NETGEN)
    case Netgen: {
        NETGENPlugin_Hypothesis_2D* hyp2d = new NETGENPlugin_Hypothesis_2D(hyp++,0,meshgen);

        if (fineness >=0 && fineness < 5) {
            hyp2d->SetFineness(NETGENPlugin_Hypothesis_2D::Fineness(fineness));
        }
        // user defined values
        else {
            if (growthRate > 0)
                hyp2d->SetGrowthRate(growthRate);
            if (nbSegPerEdge > 0)
                hyp2d->SetNbSegPerEdge(nbSegPerEdge);
            if (nbSegPerRadius > 0)
                hyp2d->SetNbSegPerRadius(nbSegPerRadius);
        }

        hyp2d->SetQuadAllowed(allowquad);
        hyp2d->SetOptimize(optimize);
        hyp2d->SetSecondOrder(secondOrder); // apply bisecting to create four triangles out of one
        hypoth.push_back(hyp2d);

        NETGENPlugin_NETGEN_2D* alg2d = new NETGENPlugin_NETGEN_2D(hyp++,0,meshgen);
        hypoth.push_back(alg2d);
    } break;
#endif
#if defined (HAVE_MEFISTO)
    case Mefisto: {
        if (maxLength > 0) {
            StdMeshers_MaxLength* hyp1d = new StdMeshers_MaxLength(hyp++, 0, meshgen);
            hyp1d->SetLength(maxLength);
            hypoth.push_back(hyp1d);
        }
        else if (localLength > 0) {
            StdMeshers_LocalLength* hyp1d = new StdMeshers_LocalLength(hyp++,0,meshgen);
            hyp1d->SetLength(localLength);
            hypoth.push_back(hyp1d);
        }
        else if (maxArea > 0) {
            StdMeshers_MaxElementArea* hyp2d = new StdMeshers_MaxElementArea(hyp++,0,meshgen);
            hyp2d->SetMaxArea(maxArea);
            hypoth.push_back(hyp2d);
        }
        else if (deflection > 0) {
            StdMeshers_Deflection1D* hyp1d = new StdMeshers_Deflection1D(hyp++,0,meshgen);
            hyp1d->SetDeflection(deflection);
            hypoth.push_back(hyp1d);
        }
        else if (minLen > 0 && maxLen > 0) {
            StdMeshers_Arithmetic1D* hyp1d = new StdMeshers_Arithmetic1D(hyp++,0,meshgen);
            hyp1d->SetLength(minLen, false);
            hyp1d->SetLength(maxLen, true);
            hypoth.push_back(hyp1d);
        }
        else {
            StdMeshers_AutomaticLength* hyp1d = new StdMeshers_AutomaticLength(hyp++,0,meshgen);
            hypoth.push_back(hyp1d);
        }

        {
            StdMeshers_NumberOfSegments* hyp1d = new StdMeshers_NumberOfSegments(hyp++,0,meshgen);
            hyp1d->SetNumberOfSegments(1);
            hypoth.push_back(hyp1d);
        }

        if (regular) {
            StdMeshers_Regular_1D* hyp1d = new StdMeshers_Regular_1D(hyp++,0,meshgen);
            hypoth.push_back(hyp1d);
        }

        StdMeshers_TrianglePreference* hyp2d_1 = new StdMeshers_TrianglePreference(hyp++,0,meshgen);
        hypoth.push_back(hyp2d_1);
        StdMeshers_MEFISTO_2D* alg2d = new StdMeshers_MEFISTO_2D(hyp++,0,meshgen);
        hypoth.push_back(alg2d);
    } break;
#endif
    default:
        break;
    }

    // Set new cout
    MeshingOutput stdcout;
    std::streambuf* oldcout = std::cout.rdbuf(&stdcout);

    // Apply the hypothesis and create the mesh
    mesh->ShapeToMesh(shape);
    for (int i=0; i<hyp;i++)
        mesh->AddHypothesis(shape, i);
    meshgen->Compute(*mesh, mesh->GetShapeToMesh());

    // Restore old cout
    std::cout.rdbuf(oldcout);

    // build up the mesh structure
    SMDS_FaceIteratorPtr aFaceIter = mesh->GetMeshDS()->facesIterator();
    SMDS_NodeIteratorPtr aNodeIter = mesh->GetMeshDS()->nodesIterator();

    MeshCore::MeshPointArray verts;
    MeshCore::MeshFacetArray faces;
    verts.reserve(mesh->NbNodes());
    faces.reserve(mesh->NbFaces());

    int index=0;
    std::map<const SMDS_MeshNode*, int> mapNodeIndex;
    for (;aNodeIter->more();) {
        const SMDS_MeshNode* aNode = aNodeIter->next();
        MeshCore::MeshPoint p;
        p.Set((float)aNode->X(), (float)aNode->Y(), (float)aNode->Z());
        verts.push_back(p);
        mapNodeIndex[aNode] = index++;
    }
    for (;aFaceIter->more();) {
        const SMDS_MeshFace* aFace = aFaceIter->next();
        if (aFace->NbNodes() == 3) {
            MeshCore::MeshFacet f;
            for (int i=0; i<3;i++) {
                const SMDS_MeshNode* node = aFace->GetNode(i);
                f._aulPoints[i] = mapNodeIndex[node];
            }
            faces.push_back(f);
        }
        else if (aFace->NbNodes() == 4) {
            MeshCore::MeshFacet f1, f2;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node1];
            f1._aulPoints[2] = mapNodeIndex[node2];

            f2._aulPoints[0] = mapNodeIndex[node0];
            f2._aulPoints[1] = mapNodeIndex[node2];
            f2._aulPoints[2] = mapNodeIndex[node3];

            faces.push_back(f1);
            faces.push_back(f2);
        }
        else if (aFace->NbNodes() == 6) {
            MeshCore::MeshFacet f1, f2, f3, f4;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);
            const SMDS_MeshNode* node4 = aFace->GetNode(4);
            const SMDS_MeshNode* node5 = aFace->GetNode(5);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node3];
            f1._aulPoints[2] = mapNodeIndex[node5];

            f2._aulPoints[0] = mapNodeIndex[node1];
            f2._aulPoints[1] = mapNodeIndex[node4];
            f2._aulPoints[2] = mapNodeIndex[node3];

            f3._aulPoints[0] = mapNodeIndex[node2];
            f3._aulPoints[1] = mapNodeIndex[node5];
            f3._aulPoints[2] = mapNodeIndex[node4];

            f4._aulPoints[0] = mapNodeIndex[node3];
            f4._aulPoints[1] = mapNodeIndex[node4];
            f4._aulPoints[2] = mapNodeIndex[node5];

            faces.push_back(f1);
            faces.push_back(f2);
            faces.push_back(f3);
            faces.push_back(f4);
        }
        else if (aFace->NbNodes() == 8) {
            MeshCore::MeshFacet f1, f2, f3, f4, f5, f6;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);
            const SMDS_MeshNode* node4 = aFace->GetNode(4);
            const SMDS_MeshNode* node5 = aFace->GetNode(5);
            const SMDS_MeshNode* node6 = aFace->GetNode(6);
            const SMDS_MeshNode* node7 = aFace->GetNode(7);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node4];
            f1._aulPoints[2] = mapNodeIndex[node7];

            f2._aulPoints[0] = mapNodeIndex[node1];
            f2._aulPoints[1] = mapNodeIndex[node5];
            f2._aulPoints[2] = mapNodeIndex[node4];

            f3._aulPoints[0] = mapNodeIndex[node2];
            f3._aulPoints[1] = mapNodeIndex[node6];
            f3._aulPoints[2] = mapNodeIndex[node5];

            f4._aulPoints[0] = mapNodeIndex[node3];
            f4._aulPoints[1] = mapNodeIndex[node7];
            f4._aulPoints[2] = mapNodeIndex[node6];

            // Two solutions are possible:
            // <4,6,7>, <4,5,6> or <4,5,7>, <5,6,7>
            Base::Vector3d v4(node4->X(),node4->Y(),node4->Z());
            Base::Vector3d v5(node5->X(),node5->Y(),node5->Z());
            Base::Vector3d v6(node6->X(),node6->Y(),node6->Z());
            Base::Vector3d v7(node7->X(),node7->Y(),node7->Z());
            double dist46 = Base::DistanceP2(v4,v6);
            double dist57 = Base::DistanceP2(v5,v7);
            if (dist46 > dist57) {
                f5._aulPoints[0] = mapNodeIndex[node4];
                f5._aulPoints[1] = mapNodeIndex[node6];
                f5._aulPoints[2] = mapNodeIndex[node7];

                f6._aulPoints[0] = mapNodeIndex[node4];
                f6._aulPoints[1] = mapNodeIndex[node5];
                f6._aulPoints[2] = mapNodeIndex[node6];
            }
            else {
                f5._aulPoints[0] = mapNodeIndex[node4];
                f5._aulPoints[1] = mapNodeIndex[node5];
                f5._aulPoints[2] = mapNodeIndex[node7];

                f6._aulPoints[0] = mapNodeIndex[node5];
                f6._aulPoints[1] = mapNodeIndex[node6];
                f6._aulPoints[2] = mapNodeIndex[node7];
            }

            faces.push_back(f1);
            faces.push_back(f2);
            faces.push_back(f3);
            faces.push_back(f4);
            faces.push_back(f5);
            faces.push_back(f6);
        }
        else {
            Base::Console().Warning("Face with %d nodes ignored\n", aFace->NbNodes());
        }
    }

    // clean up
    TopoDS_Shape aNull;
    mesh->ShapeToMesh(aNull);
    mesh->Clear();
    delete mesh;
    for (std::list<SMESH_Hypothesis*>::iterator it = hypoth.begin(); it != hypoth.end(); ++it)
        delete *it;
    
    MeshCore::MeshKernel kernel;
    kernel.Adopt(verts, faces, true);

    Mesh::MeshObject* meshdata = new Mesh::MeshObject();
    meshdata->swap(kernel);
    return meshdata;
#endif // HAVE_SMESH
}
Esempio n. 5
0
Mesh::MeshObject* Mesher::createMesh() const
{
#ifndef HAVE_SMESH
    throw Base::Exception("SMESH is not available on this platform");
#else
    std::list<SMESH_Hypothesis*> hypoth;

    SMESH_Gen* meshgen = SMESH_Gen::get();
    SMESH_Mesh* mesh = meshgen->CreateMesh(0, true);
    int hyp=0;

    switch (method) {
#if defined (HAVE_NETGEN)
    case Netgen: {
        NETGENPlugin_Hypothesis_2D* hyp2d = new NETGENPlugin_Hypothesis_2D(hyp++,0,meshgen);

        if (fineness >=0 && fineness < 5) {
            hyp2d->SetFineness(NETGENPlugin_Hypothesis_2D::Fineness(fineness));
        }
        // user defined values
        else {
            if (growthRate > 0)
                hyp2d->SetGrowthRate(growthRate);
            if (nbSegPerEdge > 0)
                hyp2d->SetNbSegPerEdge(nbSegPerEdge);
            if (nbSegPerRadius > 0)
                hyp2d->SetNbSegPerRadius(nbSegPerRadius);
        }

        hyp2d->SetQuadAllowed(allowquad);
        hyp2d->SetOptimize(optimize);
        hyp2d->SetSecondOrder(secondOrder); // apply bisecting to create four triangles out of one
        hypoth.push_back(hyp2d);

        NETGENPlugin_NETGEN_2D* alg2d = new NETGENPlugin_NETGEN_2D(hyp++,0,meshgen);
        hypoth.push_back(alg2d);
    } break;
#endif
#if defined (HAVE_MEFISTO)
    case Mefisto: {
        if (maxLength > 0) {
            StdMeshers_MaxLength* hyp1d = new StdMeshers_MaxLength(hyp++, 0, meshgen);
            hyp1d->SetLength(maxLength);
            hypoth.push_back(hyp1d);
        }
        else if (localLength > 0) {
            StdMeshers_LocalLength* hyp1d = new StdMeshers_LocalLength(hyp++,0,meshgen);
            hyp1d->SetLength(localLength);
            hypoth.push_back(hyp1d);
        }
        else if (maxArea > 0) {
            StdMeshers_MaxElementArea* hyp2d = new StdMeshers_MaxElementArea(hyp++,0,meshgen);
            hyp2d->SetMaxArea(maxArea);
            hypoth.push_back(hyp2d);
        }
        else if (deflection > 0) {
            StdMeshers_Deflection1D* hyp1d = new StdMeshers_Deflection1D(hyp++,0,meshgen);
            hyp1d->SetDeflection(deflection);
            hypoth.push_back(hyp1d);
        }
        else if (minLen > 0 && maxLen > 0) {
            StdMeshers_Arithmetic1D* hyp1d = new StdMeshers_Arithmetic1D(hyp++,0,meshgen);
            hyp1d->SetLength(minLen, false);
            hyp1d->SetLength(maxLen, true);
            hypoth.push_back(hyp1d);
        }
        else {
            StdMeshers_AutomaticLength* hyp1d = new StdMeshers_AutomaticLength(hyp++,0,meshgen);
            hypoth.push_back(hyp1d);
        }

        {
            StdMeshers_NumberOfSegments* hyp1d = new StdMeshers_NumberOfSegments(hyp++,0,meshgen);
            hyp1d->SetNumberOfSegments(1);
            hypoth.push_back(hyp1d);
        }

        if (regular) {
            StdMeshers_Regular_1D* hyp1d = new StdMeshers_Regular_1D(hyp++,0,meshgen);
            hypoth.push_back(hyp1d);
        }

        StdMeshers_TrianglePreference* hyp2d_1 = new StdMeshers_TrianglePreference(hyp++,0,meshgen);
        hypoth.push_back(hyp2d_1);
        StdMeshers_MEFISTO_2D* alg2d = new StdMeshers_MEFISTO_2D(hyp++,0,meshgen);
        hypoth.push_back(alg2d);
    } break;
#endif
    default:
        break;
    }

    // Set new cout
    MeshingOutput stdcout;
    std::streambuf* oldcout = std::cout.rdbuf(&stdcout);

    // Apply the hypothesis and create the mesh
    mesh->ShapeToMesh(shape);
    for (int i=0; i<hyp;i++)
        mesh->AddHypothesis(shape, i);
    meshgen->Compute(*mesh, mesh->GetShapeToMesh());

    // Restore old cout
    std::cout.rdbuf(oldcout);

    // build up the mesh structure
    SMDS_FaceIteratorPtr aFaceIter = mesh->GetMeshDS()->facesIterator();
    SMDS_NodeIteratorPtr aNodeIter = mesh->GetMeshDS()->nodesIterator();

    MeshCore::MeshPointArray verts;
    MeshCore::MeshFacetArray faces;
    verts.reserve(mesh->NbNodes());
    faces.reserve(mesh->NbFaces());

    int index=0;
    std::map<const SMDS_MeshNode*, int> mapNodeIndex;
    for (;aNodeIter->more();) {
        const SMDS_MeshNode* aNode = aNodeIter->next();
        MeshCore::MeshPoint p;
        p.Set((float)aNode->X(), (float)aNode->Y(), (float)aNode->Z());
        verts.push_back(p);
        mapNodeIndex[aNode] = index++;
    }
    for (;aFaceIter->more();) {
        const SMDS_MeshFace* aFace = aFaceIter->next();
        if (aFace->NbNodes() == 3) {
            MeshCore::MeshFacet f;
            for (int i=0; i<3;i++) {
                const SMDS_MeshNode* node = aFace->GetNode(i);
                f._aulPoints[i] = mapNodeIndex[node];
            }
            faces.push_back(f);
        }
        else if (aFace->NbNodes() == 4) {
            MeshCore::MeshFacet f1, f2;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node1];
            f1._aulPoints[2] = mapNodeIndex[node2];

            f2._aulPoints[0] = mapNodeIndex[node0];
            f2._aulPoints[1] = mapNodeIndex[node2];
            f2._aulPoints[2] = mapNodeIndex[node3];

            faces.push_back(f1);
            faces.push_back(f2);
        }
        else if (aFace->NbNodes() == 6) {
            MeshCore::MeshFacet f1, f2, f3, f4;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);
            const SMDS_MeshNode* node4 = aFace->GetNode(4);
            const SMDS_MeshNode* node5 = aFace->GetNode(5);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node3];
            f1._aulPoints[2] = mapNodeIndex[node5];

            f2._aulPoints[0] = mapNodeIndex[node1];
            f2._aulPoints[1] = mapNodeIndex[node4];
            f2._aulPoints[2] = mapNodeIndex[node3];

            f3._aulPoints[0] = mapNodeIndex[node2];
            f3._aulPoints[1] = mapNodeIndex[node5];
            f3._aulPoints[2] = mapNodeIndex[node4];

            f4._aulPoints[0] = mapNodeIndex[node3];
            f4._aulPoints[1] = mapNodeIndex[node4];
            f4._aulPoints[2] = mapNodeIndex[node5];

            faces.push_back(f1);
            faces.push_back(f2);
            faces.push_back(f3);
            faces.push_back(f4);
        }
        else if (aFace->NbNodes() == 8) {
            MeshCore::MeshFacet f1, f2, f3, f4, f5, f6;
            const SMDS_MeshNode* node0 = aFace->GetNode(0);
            const SMDS_MeshNode* node1 = aFace->GetNode(1);
            const SMDS_MeshNode* node2 = aFace->GetNode(2);
            const SMDS_MeshNode* node3 = aFace->GetNode(3);
            const SMDS_MeshNode* node4 = aFace->GetNode(4);
            const SMDS_MeshNode* node5 = aFace->GetNode(5);
            const SMDS_MeshNode* node6 = aFace->GetNode(6);
            const SMDS_MeshNode* node7 = aFace->GetNode(7);

            f1._aulPoints[0] = mapNodeIndex[node0];
            f1._aulPoints[1] = mapNodeIndex[node4];
            f1._aulPoints[2] = mapNodeIndex[node7];

            f2._aulPoints[0] = mapNodeIndex[node1];
            f2._aulPoints[1] = mapNodeIndex[node5];
            f2._aulPoints[2] = mapNodeIndex[node4];

            f3._aulPoints[0] = mapNodeIndex[node2];
            f3._aulPoints[1] = mapNodeIndex[node6];
            f3._aulPoints[2] = mapNodeIndex[node5];

            f4._aulPoints[0] = mapNodeIndex[node3];
            f4._aulPoints[1] = mapNodeIndex[node7];
            f4._aulPoints[2] = mapNodeIndex[node6];

            // Two solutions are possible:
            // <4,6,7>, <4,5,6> or <4,5,7>, <5,6,7>
            Base::Vector3d v4(node4->X(),node4->Y(),node4->Z());
            Base::Vector3d v5(node5->X(),node5->Y(),node5->Z());
            Base::Vector3d v6(node6->X(),node6->Y(),node6->Z());
            Base::Vector3d v7(node7->X(),node7->Y(),node7->Z());
            double dist46 = Base::DistanceP2(v4,v6);
            double dist57 = Base::DistanceP2(v5,v7);
            if (dist46 > dist57) {
                f5._aulPoints[0] = mapNodeIndex[node4];
                f5._aulPoints[1] = mapNodeIndex[node6];
                f5._aulPoints[2] = mapNodeIndex[node7];

                f6._aulPoints[0] = mapNodeIndex[node4];
                f6._aulPoints[1] = mapNodeIndex[node5];
                f6._aulPoints[2] = mapNodeIndex[node6];
            }
            else {
                f5._aulPoints[0] = mapNodeIndex[node4];
                f5._aulPoints[1] = mapNodeIndex[node5];
                f5._aulPoints[2] = mapNodeIndex[node7];

                f6._aulPoints[0] = mapNodeIndex[node5];
                f6._aulPoints[1] = mapNodeIndex[node6];
                f6._aulPoints[2] = mapNodeIndex[node7];
            }

            faces.push_back(f1);
            faces.push_back(f2);
            faces.push_back(f3);
            faces.push_back(f4);
            faces.push_back(f5);
            faces.push_back(f6);
        }
        else {
            Base::Console().Warning("Face with %d nodes ignored\n", aFace->NbNodes());
        }
    }

    // clean up
    TopoDS_Shape aNull;
    mesh->ShapeToMesh(aNull);
    mesh->Clear();
    delete mesh;
    for (std::list<SMESH_Hypothesis*>::iterator it = hypoth.begin(); it != hypoth.end(); ++it)
        delete *it;
    
    MeshCore::MeshKernel kernel;
    kernel.Adopt(verts, faces, true);

    Mesh::MeshObject* meshdata = new Mesh::MeshObject();
    meshdata->swap(kernel);
    return meshdata;
#endif // HAVE_SMESH
}