C++ TopoDS_Edge类代码示例

void BRepOffsetAPI_MakeOffsetFix::AddWire(const TopoDS_Wire& Spine)
{
    TopoDS_Wire wire = Spine;
    int numEdges = 0;
    TopExp_Explorer xp(wire, TopAbs_EDGE);
    while (xp.More()) {
        numEdges++;
        xp.Next();
    }
    if (numEdges == 1) {
        TopLoc_Location edgeLocation;

        BRepBuilderAPI_MakeWire mkWire;
        TopExp_Explorer xp(wire, TopAbs_EDGE);
        while (xp.More()) {
            // The trick is to reset the placement of an edge before
            // passing it to BRepOffsetAPI_MakeOffset because then it
            // will create the expected result.
            // Afterwards apply the placement again on the result shape.
            // See the method MakeWire()
            TopoDS_Edge edge = TopoDS::Edge(xp.Current());
            edgeLocation = edge.Location();
            edge.Location(TopLoc_Location());
            mkWire.Add(edge);
            myLocations.push_back(std::make_pair(edge, edgeLocation));
            xp.Next();
        }

        wire = mkWire.Wire();
    }
    mkOffset.AddWire(wire);
    myResult.Nullify();
}

// sometimes, we ask to replace the ending points of the curve
// in gluing operations for example
void OCCEdge::replaceEndingPointsInternals(GVertex *g0, GVertex *g1)
{
  TopoDS_Vertex aV1 = *((TopoDS_Vertex*)v0->getNativePtr());
  TopoDS_Vertex aV2 = *((TopoDS_Vertex*)v1->getNativePtr());
  TopoDS_Vertex aVR1 = *((TopoDS_Vertex*)g0->getNativePtr());
  TopoDS_Vertex aVR2 = *((TopoDS_Vertex*)g1->getNativePtr());

  //  printf("%p %p --- %p %p replacing %d %d by %d %d in occedge %d\n",
  //	 v0,v1,g0,g1,v0->tag(),v1->tag(),g0->tag(),g1->tag(),tag());

  Standard_Boolean bIsDE = BRep_Tool::Degenerated(c);

  TopoDS_Edge aEx = c;
  aEx.Orientation(TopAbs_FORWARD);

  Standard_Real t1=s0;
  Standard_Real t2=s1;

  aVR1.Orientation(TopAbs_FORWARD);
  aVR2.Orientation(TopAbs_REVERSED);

  if (bIsDE) {
    Standard_Real aTol;
    BRep_Builder aBB;
    TopoDS_Edge E;
    //TopAbs_Orientation anOrE;
    //anOrE = c.Orientation();
    aTol = BRep_Tool::Tolerance(c);
    E = aEx;
    E.EmptyCopy();
    aBB.Add(E, aVR1);
    aBB.Add(E, aVR2);
    aBB.Range(E, t1, t2);
    aBB.Degenerated(E, Standard_True);
    aBB.UpdateEdge(E, aTol);
    _replacement=E;
  }
  else {
#if (OCC_VERSION_MAJOR == 6) && (OCC_VERSION_MINOR < 6)
    BOPTools_Tools::MakeSplitEdge(aEx, aVR1, t1, aVR2, t2, _replacement);
#else
    BOPTools_AlgoTools::MakeSplitEdge(aEx, aVR1, t1, aVR2, t2, _replacement);
#endif
  }
  TopoDS_Edge temp = c;
  c = _replacement;
  _replacement = temp;
  curve = BRep_Tool::Curve(c, s0, s1);
  //build the reverse curve
  c_rev = c;
  c_rev.Reverse();
}

bool Edgecluster::IsValidEdge(const TopoDS_Edge& edge)
{
    if ( edge.IsNull() )
        return false;
    if ( BRep_Tool::Degenerated(edge) )
        return false;

    BRepAdaptor_Curve bac(edge);

    Standard_Real fparam = bac.FirstParameter();
    Standard_Real lparam = bac.LastParameter();

    gp_Pnt fpoint = bac.Value(fparam);
    gp_Pnt lpoint = bac.Value(lparam);

    //do not test the distance first last in case of a full circle edge (fpoint == lastpoint)
    //if ( fpoint.IsEqual(lpoint,1e-5 ) )
    //      return false;

    gp_Pnt mpoint = bac.Value((fparam+lparam)*0.5);

    Standard_Real dist = mpoint.Distance(lpoint);
    if ( dist <= 1e-5 )
        return false;
    dist = mpoint.Distance(fpoint);
    if ( dist <= 1e-5 )
        return false;

    return true;
}

//=======================================================================
//function : GetEdgeOff
//purpose  : 
//=======================================================================
  Standard_Boolean GEOMAlgo_Tools3D::GetEdgeOff(const TopoDS_Edge& theE1,
                                               const TopoDS_Face& theF2,
                                               TopoDS_Edge& theE2)
     
{
  Standard_Boolean bFound;
  TopAbs_Orientation aOr1, aOr1C, aOr2;
  TopExp_Explorer anExp;
  //
  bFound=Standard_False;
  aOr1=theE1.Orientation();
  aOr1C=TopAbs::Reverse(aOr1);
  //
  anExp.Init(theF2, TopAbs_EDGE);
  for (; anExp.More(); anExp.Next()) {
    const TopoDS_Edge& aEF2=TopoDS::Edge(anExp.Current());
    if (aEF2.IsSame(theE1)) {
      aOr2=aEF2.Orientation();
      if (aOr2==aOr1C) {
        theE2=aEF2;
        bFound=!bFound;
        return bFound;
      }
    }
  }
  return bFound;
}

//=======================================================================
//function :IsSplitToReverse
//purpose  : 
//=======================================================================
  Standard_Boolean GEOMAlgo_Tools3D::IsSplitToReverse(const TopoDS_Edge& theSplit,
                                                     const TopoDS_Edge& theEdge,
                                                     IntTools_Context& theContext)
{
  Standard_Boolean bRet, aFlag, bIsDegenerated;
  Standard_Real aTE, aTS, aScPr, aTa, aTb, aT1, aT2;
  TopAbs_Orientation aOrSr, aOrSp;
  Handle(Geom_Curve) aCEdge, aCSplit;
  gp_Vec aVE, aVS;
  gp_Pnt aP;
  //
  bRet=Standard_False;
  //
  bIsDegenerated=(BRep_Tool::Degenerated(theSplit) || 
                  BRep_Tool::Degenerated(theEdge));
  if (bIsDegenerated) {
    return bRet;
  }
  //
  aCEdge =BRep_Tool::Curve(theEdge , aT1, aT2);
  aCSplit=BRep_Tool::Curve(theSplit, aTa, aTb);
  //
  if (aCEdge==aCSplit) {
    aOrSr=theEdge.Orientation();
    aOrSp=theSplit.Orientation();
    bRet=(aOrSr!=aOrSp);
    return bRet;
  }
  //
  aTS=BOPTools_Tools2D::IntermediatePoint(aTa, aTb);
  aCSplit->D0(aTS, aP);
  aFlag=BOPTools_Tools2D::EdgeTangent(theSplit, aTS, aVS);
  gp_Dir aDTS(aVS);
  //
  aFlag=theContext.ProjectPointOnEdge(aP, theEdge, aTE);
  aFlag=BOPTools_Tools2D::EdgeTangent(theEdge, aTE, aVE);
  gp_Dir aDTE(aVE);
  //
  aScPr=aDTS*aDTE;
  bRet=(aScPr<0.);
  //
  return bRet;
}

TopoDS_Edge
        StdMeshers_Hexa_3D::EdgeNotInFace(SMESH_Mesh & aMesh,
        const TopoDS_Shape & aShape,
        const TopoDS_Face & aFace,
        const TopoDS_Vertex & aVertex,
        const TopTools_IndexedDataMapOfShapeListOfShape & MS)
{
        //MESSAGE("StdMeshers_Hexa_3D::EdgeNotInFace");
        TopTools_IndexedDataMapOfShapeListOfShape MF;
        TopExp::MapShapesAndAncestors(aFace, TopAbs_VERTEX, TopAbs_EDGE, MF);
        const TopTools_ListOfShape & ancestorsInSolid = MS.FindFromKey(aVertex);
        const TopTools_ListOfShape & ancestorsInFace = MF.FindFromKey(aVertex);
//      SCRUTE(ancestorsInSolid.Extent());
//      SCRUTE(ancestorsInFace.Extent());
        ASSERT(ancestorsInSolid.Extent() == 6); // 6 (edges doublees)
        ASSERT(ancestorsInFace.Extent() == 2);

        TopoDS_Edge E;
        E.Nullify();
        TopTools_ListIteratorOfListOfShape its(ancestorsInSolid);
        for (; its.More(); its.Next())
        {
                TopoDS_Shape ancestor = its.Value();
                TopTools_ListIteratorOfListOfShape itf(ancestorsInFace);
                bool isInFace = false;
                for (; itf.More(); itf.Next())
                {
                        TopoDS_Shape ancestorInFace = itf.Value();
                        if (ancestorInFace.IsSame(ancestor))
                        {
                                isInFace = true;
                                break;
                        }
                }
                if (!isInFace)
                {
                        E = TopoDS::Edge(ancestor);
                        break;
                }
        }
        return E;
}

//=======================================================================
//function : SamePnt2d
//purpose  : 
//=======================================================================
static Standard_Boolean  SamePnt2d(TopoDS_Vertex  V,
				   TopoDS_Edge&   E1,
				   TopoDS_Edge&   E2,
				   TopoDS_Face&   F)
{
  Standard_Real   f1,f2,l1,l2;
  gp_Pnt2d        P1,P2;
  TopoDS_Shape aLocalF = F.Oriented(TopAbs_FORWARD);
  TopoDS_Face FF = TopoDS::Face(aLocalF);
  Handle(Geom2d_Curve) C1 = BRep_Tool::CurveOnSurface(E1,FF,f1,l1);  
  Handle(Geom2d_Curve) C2 = BRep_Tool::CurveOnSurface(E2,FF,f2,l2);  
  if (E1.Orientation () == TopAbs_FORWARD) P1 = C1->Value(f1);
  else                                     P1 = C1->Value(l1);
  
  if (E2.Orientation () == TopAbs_FORWARD) P2 = C2->Value(l2);
  else                                     P2 = C2->Value(f2);
  Standard_Real Tol  = 100*BRep_Tool::Tolerance(V);
  Standard_Real Dist = P1.Distance(P2);
  return Dist < Tol; 
}

bool SMESH_Algo::GetSortedNodesOnEdge(const SMESHDS_Mesh*                   theMesh,
                                      const TopoDS_Edge&                    theEdge,
                                      const bool                            ignoreMediumNodes,
                                      map< double, const SMDS_MeshNode* > & theNodes)
{
  theNodes.clear();

  if ( !theMesh || theEdge.IsNull() )
    return false;

  SMESHDS_SubMesh * eSubMesh = theMesh->MeshElements( theEdge );
  if ( !eSubMesh || !eSubMesh->GetElements()->more() )
    return false; // edge is not meshed

  int nbNodes = 0;
  set < double > paramSet;
  if ( eSubMesh )
  {
    // loop on nodes of an edge: sort them by param on edge
    SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
    while ( nIt->more() )
    {
      const SMDS_MeshNode* node = nIt->next();
      if ( ignoreMediumNodes ) {
        SMDS_ElemIteratorPtr elemIt = node->GetInverseElementIterator();
        if ( elemIt->more() && elemIt->next()->IsMediumNode( node ))
          continue;
      }
      const SMDS_PositionPtr& pos = node->GetPosition();
      if ( pos->GetTypeOfPosition() != SMDS_TOP_EDGE )
        return false;
      const SMDS_EdgePosition* epos =
        static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
      theNodes.insert( make_pair( epos->GetUParameter(), node ));
      ++nbNodes;
    }
  }
  // add vertex nodes
  TopoDS_Vertex v1, v2;
  TopExp::Vertices(theEdge, v1, v2);
  const SMDS_MeshNode* n1 = VertexNode( v1, (SMESHDS_Mesh*) theMesh );
  const SMDS_MeshNode* n2 = VertexNode( v2, (SMESHDS_Mesh*) theMesh );
  Standard_Real f, l;
  BRep_Tool::Range(theEdge, f, l);
  if ( v1.Orientation() != TopAbs_FORWARD )
    std::swap( f, l );
  if ( n1 && ++nbNodes )
    theNodes.insert( make_pair( f, n1 ));
  if ( n2 && ++nbNodes )
    theNodes.insert( make_pair( l, n2 ));

  return theNodes.size() == nbNodes;
}

bool SMESH_Algo::GetNodeParamOnEdge(const SMESHDS_Mesh* theMesh,
                                    const TopoDS_Edge&  theEdge,
                                    vector< double > &  theParams)
{
  theParams.clear();

  if ( !theMesh || theEdge.IsNull() )
    return false;

  SMESHDS_SubMesh * eSubMesh = theMesh->MeshElements( theEdge );
  if ( !eSubMesh || !eSubMesh->GetElements()->more() )
    return false; // edge is not meshed

  //int nbEdgeNodes = 0;
  set < double > paramSet;
  if ( eSubMesh )
  {
    // loop on nodes of an edge: sort them by param on edge
    SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
    while ( nIt->more() )
    {
      const SMDS_MeshNode* node = nIt->next();
      const SMDS_PositionPtr& pos = node->GetPosition();
      if ( pos->GetTypeOfPosition() != SMDS_TOP_EDGE )
        return false;
      const SMDS_EdgePosition* epos =
        static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
      if ( !paramSet.insert( epos->GetUParameter() ).second )
        return false; // equal parameters
    }
  }
  // add vertex nodes params
  TopoDS_Vertex V1,V2;
  TopExp::Vertices( theEdge, V1, V2);
  if ( VertexNode( V1, theMesh ) &&
       !paramSet.insert( BRep_Tool::Parameter(V1,theEdge) ).second )
    return false; // there are equal parameters
  if ( VertexNode( V2, theMesh ) &&
       !paramSet.insert( BRep_Tool::Parameter(V2,theEdge) ).second )
    return false; // there are equal parameters

  // fill the vector
  theParams.resize( paramSet.size() );
  set < double >::iterator   par    = paramSet.begin();
  vector< double >::iterator vecPar = theParams.begin();
  for ( ; par != paramSet.end(); ++par, ++vecPar )
    *vecPar = *par;

  return theParams.size() > 1;
}

StdMeshers_FaceSide *
StdMeshers_CompositeSegment_1D::GetFaceSide(SMESH_Mesh&        aMesh,
                                            const TopoDS_Edge& anEdge,
                                            const TopoDS_Face& aFace,
                                            const bool         ignoreMeshed)
{
  list< TopoDS_Edge > edges;
  edges.push_back( anEdge );

  list <const SMESHDS_Hypothesis *> hypList;
  SMESH_Algo* theAlgo = aMesh.GetGen()->GetAlgo( aMesh, anEdge );
  if ( theAlgo ) hypList = theAlgo->GetUsedHypothesis(aMesh, anEdge, false);
  for ( int forward = 0; forward < 2; ++forward )
  {
    TopoDS_Edge eNext = nextC1Edge( anEdge, aMesh, forward );
    while ( !eNext.IsNull() ) {
      if ( ignoreMeshed ) {
        // eNext must not have computed mesh
        if ( SMESHDS_SubMesh* sm = aMesh.GetMeshDS()->MeshElements(eNext) )
          if ( sm->NbNodes() || sm->NbElements() )
            break;
      }
      // eNext must have same hypotheses
      SMESH_Algo* algo = aMesh.GetGen()->GetAlgo( aMesh, eNext );
      if ( !algo ||
           string(theAlgo->GetName()) != algo->GetName() ||
           hypList != algo->GetUsedHypothesis(aMesh, eNext, false))
        break;
      if ( forward )
        edges.push_back( eNext );
      else
        edges.push_front( eNext );
      eNext = nextC1Edge( eNext, aMesh, forward );
    }
  }
  return new StdMeshers_FaceSide( aFace, edges, &aMesh, true, false );
}

void Edgecluster::Perform(const TopoDS_Edge& edge)
{
    if ( edge.IsNull() )
        return;
    TopoDS_Vertex V1,V2;
    TopExp::Vertices(edge,V1,V2);
    gp_Pnt P1 = BRep_Tool::Pnt(V1);
    gp_Pnt P2 = BRep_Tool::Pnt(V2);

    tEdgeVector emptyList;

    std::pair<tMapPntEdge::iterator,bool> iter = m_vertices.insert(tMapPntEdgePair(P1,emptyList));
    iter.first->second.push_back(edge);
    iter = m_vertices.insert(tMapPntEdgePair(P2,emptyList));
    iter.first->second.push_back(edge);
}

int convert_to_ifc(const TopoDS_Edge& e, IfcSchema::IfcEdge*& edge, bool advanced) {
	double a, b;

	TopExp_Explorer exp(e, TopAbs_VERTEX);
	if (!exp.More()) return 0;
	TopoDS_Vertex v1 = TopoDS::Vertex(exp.Current());
	exp.Next();
	if (!exp.More()) return 0;
	TopoDS_Vertex v2 = TopoDS::Vertex(exp.Current());

	IfcSchema::IfcVertex *vertex1, *vertex2;
	if (!(convert_to_ifc(v1, vertex1, advanced) && convert_to_ifc(v2, vertex2, advanced))) {
		return 0;
	}

	Handle_Geom_Curve crv = BRep_Tool::Curve(e, a, b);

	if (crv.IsNull()) {
		return 0;
	}

	if (crv->DynamicType() == STANDARD_TYPE(Geom_Line) && !advanced) {
		IfcSchema::IfcEdge* edge2 = new IfcSchema::IfcEdge(vertex1, vertex2);
		edge = new IfcSchema::IfcOrientedEdge(edge2, true);
		return 1;
	} else {
		IfcSchema::IfcCurve* curve;
		if (!convert_to_ifc(crv, curve, advanced)) {
			return 0;
		}
		/// @todo probably not correct
		const bool sense = e.Orientation() == TopAbs_FORWARD;
		IfcSchema::IfcEdge* edge2 = new IfcSchema::IfcEdgeCurve(vertex1, vertex2, curve, true);
		edge = new IfcSchema::IfcOrientedEdge(edge2, sense);
		return 1;
	}
}

App::DocumentObjectExecReturn *Draft::execute(void)
{
    // Get parameters
    // Base shape
    Part::TopoShape TopShape;
    try {
        TopShape = getBaseShape();
    } catch (Base::Exception& e) {
        return new App::DocumentObjectExecReturn(e.what());
    }

    // Faces where draft should be applied
    // Note: Cannot be const reference currently because of BRepOffsetAPI_DraftAngle::Remove() bug, see below
    std::vector<std::string> SubVals = Base.getSubValuesStartsWith("Face");
    if (SubVals.size() == 0)
        return new App::DocumentObjectExecReturn("No faces specified");

    // Draft angle
    double angle = Angle.getValue() / 180.0 * M_PI;

    // Pull direction
    gp_Dir pullDirection;
    App::DocumentObject* refDirection = PullDirection.getValue();    
    if (refDirection != NULL) {
        if (refDirection->getTypeId().isDerivedFrom(PartDesign::Line::getClassTypeId())) {
                    PartDesign::Line* line = static_cast<PartDesign::Line*>(refDirection);
                    Base::Vector3d d = line->getDirection();
                    pullDirection = gp_Dir(d.x, d.y, d.z);
        } else if (refDirection->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
            std::vector<std::string> subStrings = PullDirection.getSubValues();
            if (subStrings.empty() || subStrings[0].empty())
                throw Base::Exception("No pull direction reference specified");

            Part::Feature* refFeature = static_cast<Part::Feature*>(refDirection);
            Part::TopoShape refShape = refFeature->Shape.getShape();
            TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());

            if (ref.ShapeType() == TopAbs_EDGE) {
                TopoDS_Edge refEdge = TopoDS::Edge(ref);
                if (refEdge.IsNull())
                    throw Base::Exception("Failed to extract pull direction reference edge");
                BRepAdaptor_Curve adapt(refEdge);
                if (adapt.GetType() != GeomAbs_Line)
                    throw Base::Exception("Pull direction reference edge must be linear");

                pullDirection = adapt.Line().Direction();
            } else {
                throw Base::Exception("Pull direction reference must be an edge or a datum line");
            }
        } else {
            throw Base::Exception("Pull direction reference must be an edge of a feature or a datum line");
        }

        TopLoc_Location invObjLoc = this->getLocation().Inverted();
        pullDirection.Transform(invObjLoc.Transformation());
    }

    // Neutral plane
    gp_Pln neutralPlane;
    App::DocumentObject* refPlane = NeutralPlane.getValue();
    if (refPlane == NULL) {
        // Try to guess a neutral plane from the first selected face
        // Get edges of first selected face
        TopoDS_Shape face = TopShape.getSubShape(SubVals[0].c_str());
        TopTools_IndexedMapOfShape mapOfEdges;
        TopExp::MapShapes(face, TopAbs_EDGE, mapOfEdges);
        bool found = false;

        for (int i = 1; i <= mapOfEdges.Extent(); i++) {
            // Note: What happens if mapOfEdges(i) is the degenerated edge of a cone?
            // But in that case the draft is not possible anyway!
            BRepAdaptor_Curve c(TopoDS::Edge(mapOfEdges(i)));
            gp_Pnt p1 = c.Value(c.FirstParameter());
            gp_Pnt p2 = c.Value(c.LastParameter());

            if (c.IsClosed()) {
                // Edge is a circle or a circular arc (other types are not allowed for drafting)
                neutralPlane = gp_Pln(p1, c.Circle().Axis().Direction());
                found = true;
                break;
            } else {
                // Edge is linear
                // Find midpoint of edge and create auxiliary plane through midpoint normal to edge
                gp_Pnt pm = c.Value((c.FirstParameter() + c.LastParameter()) / 2.0);
                Handle(Geom_Plane) aux = new Geom_Plane(pm, gp_Dir(p2.X() - p1.X(), p2.Y() - p1.Y(), p2.Z() - p1.Z()));
                // Intersect plane with face. Is there no easier way?
                BRepAdaptor_Surface adapt(TopoDS::Face(face), Standard_False);
                Handle(Geom_Surface) sf = adapt.Surface().Surface();
                GeomAPI_IntSS intersector(aux, sf, Precision::Confusion());
                if (!intersector.IsDone())
                    continue;
                Handle(Geom_Curve) icurve = intersector.Line(1);
                if (!icurve->IsKind(STANDARD_TYPE(Geom_Line)))
                    continue;
                // TODO: How to extract the line from icurve without creating an edge first?
                TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(icurve);
                BRepAdaptor_Curve c(edge);
                neutralPlane = gp_Pln(pm, c.Line().Direction());
                found = true;
                break;
//.........这里部分代码省略.........

const std::list<gp_Trsf> LinearPattern::getTransformations(const std::vector<App::DocumentObject*>)
{
    std::string stdDirection = StdDirection.getValue();
    float distance = Length.getValue();
    if (distance < Precision::Confusion())
        throw Base::Exception("Pattern length too small");
    int occurrences = Occurrences.getValue();
    if (occurrences < 2)
        throw Base::Exception("At least two occurrences required");
    bool reversed = Reversed.getValue();

    gp_Dir dir;
    double offset = distance / (occurrences - 1);

    if (!stdDirection.empty()) {
        // Note: The placement code commented out below had the defect of working always on the
        // absolute X,Y,Z direction, not on the relative coordinate system of the Body feature.
        // It requires positionBySupport() to be called in Transformed::Execute() AFTER
        // the call to getTransformations()
        // New code thanks to logari81
        if (stdDirection == "X") {
            //dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(1,0,0));
            dir = gp_Dir(1,0,0);
        } else if (stdDirection == "Y") {
            //dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(0,1,0));
            dir = gp_Dir(0,1,0);
        } else if(stdDirection == "Z") {
            //dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(0,0,1));
            dir = gp_Dir(0,0,1);
        } else {
            throw Base::Exception("Invalid direction (must be X, Y or Z)");
        }
    } else {
        App::DocumentObject* refObject = Direction.getValue();
        if (refObject == NULL)
            throw Base::Exception("No direction specified");
        if (!refObject->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
            throw Base::Exception("Direction reference must be edge or face of a feature");
        std::vector<std::string> subStrings = Direction.getSubValues();
        if (subStrings.empty() || subStrings[0].empty())
            throw Base::Exception("No direction reference specified");

        Part::Feature* refFeature = static_cast<Part::Feature*>(refObject);
        Part::TopoShape refShape = refFeature->Shape.getShape();
        TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());

        if (ref.ShapeType() == TopAbs_FACE) {
            TopoDS_Face refFace = TopoDS::Face(ref);
            if (refFace.IsNull())
                throw Base::Exception("Failed to extract direction plane");
            BRepAdaptor_Surface adapt(refFace);
            if (adapt.GetType() != GeomAbs_Plane)
                throw Base::Exception("Direction face must be planar");

            dir = adapt.Plane().Axis().Direction();
            //gp_Dir d = adapt.Plane().Axis().Direction();
            //dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(d.X(), d.Y(), d.Z()));
        } else if (ref.ShapeType() == TopAbs_EDGE) {
            TopoDS_Edge refEdge = TopoDS::Edge(ref);
            if (refEdge.IsNull())
                throw Base::Exception("Failed to extract direction edge");
            BRepAdaptor_Curve adapt(refEdge);
            if (adapt.GetType() != GeomAbs_Line)
                throw Base::Exception("Direction edge must be a straight line");

            //gp_Dir d = adapt.Line().Direction();
            //dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(d.X(), d.Y(), d.Z()));
            dir = adapt.Line().Direction();
        } else {
            throw Base::Exception("Direction reference must be edge or face");
        }
        TopLoc_Location invObjLoc = this->getLocation().Inverted();
        dir.Transform(invObjLoc.Transformation());
    }

    // get the support placement
    // TODO: Check for NULL pointer
    /*Part::Feature* supportFeature = static_cast<Part::Feature*>(originals.front());
    if (supportFeature == NULL)
        throw Base::Exception("Cannot work on invalid support shape");
    Base::Placement supportPlacement = supportFeature->Placement.getValue();
    dir *= supportPlacement;
    gp_Vec direction(dir.getDirection().x, dir.getDirection().y, dir.getDirection().z);*/
    gp_Vec direction(dir.X(), dir.Y(), dir.Z());

    if (reversed)
        direction.Reverse();

    // Note: The original feature is NOT included in the list of transformations! Therefore
    // we start with occurrence number 1, not number 0
    std::list<gp_Trsf> transformations;
    gp_Trsf trans;
    transformations.push_back(trans); // identity transformation

    for (int i = 1; i < occurrences; i++) {
        trans.SetTranslation(direction * i * offset);
        transformations.push_back(trans);
    }

    return transformations;
//.........这里部分代码省略.........

bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
                                         const TopoDS_Face& theFace,
                                         const TopoDS_Edge& theBaseEdge,
                                         SMESHDS_Mesh*      theMesh)
{
  // get vertices of theBaseEdge
  TopoDS_Vertex vfb, vlb, vft; // first and last, bottom and top vertices
  TopoDS_Edge eFrw = TopoDS::Edge( theBaseEdge.Oriented( TopAbs_FORWARD ));
  TopExp::Vertices( eFrw, vfb, vlb );

  // find the other edges of theFace and orientation of e1
  TopoDS_Edge e1, e2, eTop;
  bool rev1, CumOri = false;
  TopExp_Explorer exp( theFace, TopAbs_EDGE );
  int nbEdges = 0;
  for ( ; exp.More(); exp.Next() ) {
    if ( ++nbEdges > 4 ) {
      return false; // more than 4 edges in theFace
    }
    TopoDS_Edge e = TopoDS::Edge( exp.Current() );
    if ( theBaseEdge.IsSame( e ))
      continue;
    TopoDS_Vertex vCommon;
    if ( !TopExp::CommonVertex( theBaseEdge, e, vCommon ))
      eTop = e;
    else if ( vCommon.IsSame( vfb )) {
      e1 = e;
      vft = TopExp::LastVertex( e1, CumOri );
      rev1 = vfb.IsSame( vft );
      if ( rev1 )
        vft = TopExp::FirstVertex( e1, CumOri );
    }
    else
      e2 = e;
  }
  if ( nbEdges < 4 ) {
    return false; // less than 4 edges in theFace
  }
  if ( e2.IsNull() && vfb.IsSame( vlb ))
    e2 = e1;

  // submeshes corresponding to shapes
  SMESHDS_SubMesh* smFace = theMesh->MeshElements( theFace );
  SMESHDS_SubMesh* smb = theMesh->MeshElements( theBaseEdge );
  SMESHDS_SubMesh* smt = theMesh->MeshElements( eTop );
  SMESHDS_SubMesh* sm1 = theMesh->MeshElements( e1 );
  SMESHDS_SubMesh* sm2 = theMesh->MeshElements( e2 );
  SMESHDS_SubMesh* smVfb = theMesh->MeshElements( vfb );
  SMESHDS_SubMesh* smVlb = theMesh->MeshElements( vlb );
  SMESHDS_SubMesh* smVft = theMesh->MeshElements( vft );
  if (!smFace || !smb || !smt || !sm1 || !sm2 || !smVfb || !smVlb || !smVft ) {
    RETURN_BAD_RESULT( "NULL submesh " <<smFace<<" "<<smb<<" "<<smt<<" "<<
                       sm1<<" "<<sm2<<" "<<smVfb<<" "<<smVlb<<" "<<smVft);
  }
  if ( smb->NbNodes() != smt->NbNodes() || sm1->NbNodes() != sm2->NbNodes() ) {
    RETURN_BAD_RESULT(" Diff nb of nodes on opposite edges" );
  }
  if (smVfb->NbNodes() != 1 || smVlb->NbNodes() != 1 || smVft->NbNodes() != 1) {
    RETURN_BAD_RESULT("Empty submesh of vertex");
  }
  // define whether mesh is quadratic
  bool isQuadraticMesh = false;
  SMDS_ElemIteratorPtr eIt = smFace->GetElements();
  if ( !eIt->more() ) {
    RETURN_BAD_RESULT("No elements on the face");
  }
  const SMDS_MeshElement* e = eIt->next();
  isQuadraticMesh = e->IsQuadratic();
  
  if ( sm1->NbNodes() * smb->NbNodes() != smFace->NbNodes() ) {
    // check quadratic case
    if ( isQuadraticMesh ) {
      // what if there are quadrangles and triangles mixed?
//       int n1 = sm1->NbNodes()/2;
//       int n2 = smb->NbNodes()/2;
//       int n3 = sm1->NbNodes() - n1;
//       int n4 = smb->NbNodes() - n2;
//       int nf = sm1->NbNodes()*smb->NbNodes() - n3*n4;
//       if( nf != smFace->NbNodes() ) {
//         MESSAGE( "Wrong nb face nodes: " <<
//                 sm1->NbNodes()<<" "<<smb->NbNodes()<<" "<<smFace->NbNodes());
//         return false;
//       }
    }
    else {
      RETURN_BAD_RESULT( "Wrong nb face nodes: " <<
                         sm1->NbNodes()<<" "<<smb->NbNodes()<<" "<<smFace->NbNodes());
    }
  }
  // IJ size
  int vsize = sm1->NbNodes() + 2;
  int hsize = smb->NbNodes() + 2;
  if(isQuadraticMesh) {
    vsize = vsize - sm1->NbNodes()/2 -1;
    hsize = hsize - smb->NbNodes()/2 -1;
  }

  // load nodes from theBaseEdge

  std::set<const SMDS_MeshNode*> loadedNodes;
//.........这里部分代码省略.........