--- /dev/null
+using namespace std;
+//=============================================================================
+// File : SMESH_Quadrangle_2D.cxx
+// Created : sam mai 18 08:11:32 CEST 2002
+// Author : Paul RASCLE, EDF
+// Project : SALOME
+// Copyright : EDF 2002
+// $Header$
+//=============================================================================
+using namespace std;
+
+#include "SMESH_Quadrangle_2D.hxx"
+#include "SMESH_Gen.hxx"
+#include "SMESH_Mesh.hxx"
+
+#include "SMDS_MeshElement.hxx"
+#include "SMDS_MeshNode.hxx"
+#include "SMDS_EdgePosition.hxx"
+#include "SMDS_FacePosition.hxx"
+
+#include <BRep_Tool.hxx>
+#include <BRepTools.hxx>
+#include <BRepTools_WireExplorer.hxx>
+#include <Geom_Surface.hxx>
+#include <Geom_Curve.hxx>
+#include <Geom2d_Curve.hxx>
+#include <Handle_Geom2d_Curve.hxx>
+#include <Handle_Geom_Curve.hxx>
+#include <gp_Pnt2d.hxx>
+#include <TColStd_ListIteratorOfListOfInteger.hxx>
+
+#include "utilities.h"
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+SMESH_Quadrangle_2D::SMESH_Quadrangle_2D(int hypId,
+ int studyId,
+ SMESH_Gen* gen)
+ : SMESH_2D_Algo(hypId, studyId, gen)
+{
+ MESSAGE("SMESH_Quadrangle_2D::SMESH_Quadrangle_2D");
+ _name = "Quadrangle_2D";
+ // _shapeType = TopAbs_FACE;
+ _shapeType = (1<<TopAbs_FACE);
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+SMESH_Quadrangle_2D::~SMESH_Quadrangle_2D()
+{
+ MESSAGE("SMESH_Quadrangle_2D::~SMESH_Quadrangle_2D");
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+bool SMESH_Quadrangle_2D::CheckHypothesis(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape)
+{
+ //MESSAGE("SMESH_Quadrangle_2D::CheckHypothesis");
+
+ bool isOk = true;
+
+ // nothing to check
+
+ return isOk;
+}
+
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+bool SMESH_Quadrangle_2D::Compute(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape)
+ throw (SALOME_Exception)
+{
+ //MESSAGE("SMESH_Quadrangle_2D::Compute");
+ const Handle(SMESHDS_Mesh)& meshDS = aMesh.GetMeshDS();
+ SMESH_subMesh* theSubMesh = aMesh.GetSubMesh(aShape);
+
+ FaceQuadStruct* quad = CheckAnd2Dcompute(aMesh, aShape);
+ if (!quad) return false;
+
+ // --- compute 3D values on points, store points & quadrangles
+
+ int nbdown = quad->nbPts[0];
+ int nbright = quad->nbPts[1];
+ int nbVertices = nbdown*nbright;
+ int nbQuad = (nbdown-1)*(nbright-1);
+ //SCRUTE(nbVertices);
+ //SCRUTE(nbQuad);
+
+ // const TopoDS_Face& FF = TopoDS::Face(aShape);
+ // bool faceIsForward = (FF.Orientation() == TopAbs_FORWARD);
+ // TopoDS_Face F = TopoDS::Face(FF.Oriented(TopAbs_FORWARD));
+ const TopoDS_Face& F = TopoDS::Face(aShape);
+ bool faceIsForward = (F.Orientation() == TopAbs_FORWARD);
+ Handle(Geom_Surface) S = BRep_Tool::Surface(F);
+
+ for (int i=1; i<nbdown-1; i++)
+ for (int j=1; j<nbright-1; j++) // internal points
+ {
+ int ij = j*nbdown +i;
+ double u = quad->uv_grid[ij].u;
+ double v = quad->uv_grid[ij].v;
+ gp_Pnt P = S->Value(u,v);
+ int nodeId = meshDS->AddNode(P.X(), P.Y(), P.Z());
+ //MESSAGE("point "<< nodeId<<" "<<" "<<P.X()<<" "<<P.Y()<<" "<<P.Z());
+ Handle (SMDS_MeshElement) elt = meshDS->FindNode(nodeId);
+ Handle (SMDS_MeshNode) node = meshDS->GetNode(1, elt);
+ meshDS->SetNodeOnFace(node, F);
+ quad->uv_grid[ij].nodeId = nodeId;
+// Handle (SMDS_FacePosition) fpos
+// = new SMDS_FacePosition(theSubMesh->GetId(),i,j); // easier than u,v
+// node->SetPosition(fpos);
+ Handle (SMDS_FacePosition) fpos
+ = Handle (SMDS_FacePosition)::DownCast(node->GetPosition());
+ fpos->SetUParameter(i);
+ fpos->SetVParameter(j);
+ }
+
+ // bool isQuadForward = ( faceIsForward == quad->isEdgeForward[0]);
+ for (int i=0; i<nbdown-1; i++)
+ for (int j=0; j<nbright-1; j++) // faces
+ {
+ int a = quad->uv_grid[ j *nbdown +i ].nodeId;
+ int b = quad->uv_grid[ j *nbdown +i+1].nodeId;
+ int c = quad->uv_grid[(j+1)*nbdown +i+1].nodeId;
+ int d = quad->uv_grid[(j+1)*nbdown +i ].nodeId;
+ int faceId;
+ // if (isQuadForward) faceId = meshDS->AddFace(a,b,c,d);
+ // else faceId = meshDS->AddFace(a,d,c,b);
+ faceId = meshDS->AddFace(a,b,c,d);
+ Handle (SMDS_MeshElement) elt = meshDS->FindElement(faceId);
+ meshDS->SetMeshElementOnShape(elt, F);
+ }
+
+ QuadDelete(quad);
+ bool isOk = true;
+ return isOk;
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+FaceQuadStruct*
+SMESH_Quadrangle_2D::CheckAnd2Dcompute(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape)
+ throw (SALOME_Exception)
+{
+ //MESSAGE("SMESH_Quadrangle_2D::ComputeWithoutStore");
+
+ SMESH_subMesh* theSubMesh = aMesh.GetSubMesh(aShape);
+
+ // const TopoDS_Face& FF = TopoDS::Face(aShape);
+ // bool faceIsForward = (FF.Orientation() == TopAbs_FORWARD);
+ // TopoDS_Face F = TopoDS::Face(FF.Oriented(TopAbs_FORWARD));
+ const TopoDS_Face& F = TopoDS::Face(aShape);
+ bool faceIsForward = (F.Orientation() == TopAbs_FORWARD);
+
+ // verify 1 wire only, with 4 edges, same number of points on opposite edges
+
+ if (NumberOfWires (F) != 1)
+ {
+ MESSAGE("only 1 wire by face (quadrangles)");
+ return 0;
+ //throw SALOME_Exception(LOCALIZED("only 1 wire by face (quadrangles)"));
+ }
+ // const TopoDS_Wire WW = BRepTools::OuterWire(F);
+ // TopoDS_Wire W = TopoDS::Wire(WW.Oriented(TopAbs_FORWARD));
+ const TopoDS_Wire& W = BRepTools::OuterWire(F);
+ BRepTools_WireExplorer wexp(W,F);
+
+ FaceQuadStruct* quad = new FaceQuadStruct;
+ for (int i=0; i<4; i++) quad->uv_edges[i] = 0;
+ quad->uv_grid = 0;
+
+ int nbEdges = 0;
+ for (wexp.Init(W,F);wexp.More(); wexp.Next())
+ {
+ // const TopoDS_Edge& EE = wexp.Current();
+ // TopoDS_Edge E = TopoDS::Edge(EE.Oriented(TopAbs_FORWARD));
+ const TopoDS_Edge& E = wexp.Current();
+ int nb = aMesh.GetSubMesh(E)->GetSubMeshDS()->NbNodes();
+ if (nbEdges < 4)
+ {
+ quad->edge[nbEdges] = E;
+ quad->nbPts[nbEdges] = nb +2; // internal points + 2 extrema
+ }
+ nbEdges++;
+ }
+
+ if (nbEdges != 4)
+ {
+ MESSAGE("face must have 4 edges /quadrangles");
+ QuadDelete(quad);
+ return 0;
+ //throw SALOME_Exception(LOCALIZED("face must have 4 edges /quadrangles"));
+ }
+
+ if (quad->nbPts[0] != quad->nbPts[2])
+ {
+ MESSAGE("different point number-opposed edge");
+ QuadDelete(quad);
+ return 0;
+ //throw SALOME_Exception(LOCALIZED("different point number-opposed edge"));
+ }
+
+ if (quad->nbPts[1] != quad->nbPts[3])
+ {
+ MESSAGE("different point number-opposed edge");
+ QuadDelete(quad);
+ return 0;
+ //throw SALOME_Exception(LOCALIZED("different point number-opposed edge"));
+ }
+
+ // set normalized grid on unit square in parametric domain
+
+ SetNormalizedGrid(aMesh, F, quad);
+
+ return quad;
+}
+
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+ void SMESH_Quadrangle_2D::QuadDelete(FaceQuadStruct* quad)
+{
+ //MESSAGE("SMESH_Quadrangle_2D::QuadDelete");
+ if (quad)
+ {
+ for (int i=0; i<4; i++)
+ {
+ if (quad->uv_edges[i]) delete [] quad->uv_edges[i];
+ quad->edge[i].Nullify();
+ }
+ if (quad->uv_grid) delete [] quad->uv_grid;
+ delete quad;
+ }
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+void SMESH_Quadrangle_2D::SetNormalizedGrid(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape,
+ FaceQuadStruct* quad)
+ throw (SALOME_Exception)
+{
+ // Algorithme décrit dans "Génération automatique de maillages"
+ // P.L. GEORGE, MASSON, § 6.4.1 p. 84-85
+ // traitement dans le domaine paramétrique 2d u,v
+ // transport - projection sur le carré unité
+
+ const TopoDS_Face& F = TopoDS::Face(aShape);
+
+ // 1 --- find orientation of the 4 edges, by test on extrema
+
+ // max min 0 x1 1
+ // |<----north-2-------^ a3 -------------> a2
+ // | | ^1 1^
+ // west-3 east-1 =right | |
+ // | | ==> | |
+ // y0 | | y1 | |
+ // | | |0 0|
+ // v----south-0--------> a0 -------------> a1
+ // min max 0 x0 1
+ // =down
+ //
+
+ Handle (Geom2d_Curve) c2d[4];
+ gp_Pnt2d pf[4];
+ gp_Pnt2d pl[4];
+ for (int i=0; i<4; i++)
+ {
+ c2d[i] = BRep_Tool::CurveOnSurface(quad->edge[i],
+ F,
+ quad->first[i],
+ quad->last[i]);
+ pf[i] = c2d[i]->Value(quad->first[i]);
+ pl[i] = c2d[i]->Value(quad->last[i]);
+ quad->isEdgeForward[i] = false;
+ }
+
+ double eps2d = 1.e-3; // *** utiliser plutot TopExp::CommonVertex, puis
+ // distances si piece fausse
+ int i=0;
+ if ((pf[1].Distance(pl[0]) < eps2d) || (pl[1].Distance(pl[0]) < eps2d))
+ {
+ quad->isEdgeForward[0] = true;
+ }
+ else
+ {
+ double tmp =quad->first[0];
+ quad->first[0] = quad->last[0];
+ quad->last[0] = tmp;
+ pf[0] = c2d[0]->Value(quad->first[0]);
+ pl[0] = c2d[0]->Value(quad->last[0]);
+ }
+ for (int i=1; i<4; i++)
+ {
+ quad->isEdgeForward[i] = (pf[i].Distance(pl[i-1]) < eps2d);
+ if (! quad->isEdgeForward[i])
+ {
+ double tmp =quad->first[i];
+ quad->first[i] = quad->last[i];
+ quad->last[i] = tmp;
+ pf[i] = c2d[i]->Value(quad->first[i]);
+ pl[i] = c2d[i]->Value(quad->last[i]);
+ //SCRUTE(pf[i].Distance(pl[i-1]));
+ ASSERT(pf[i].Distance(pl[i-1]) < eps2d);
+ }
+ }
+ //SCRUTE(pf[0].Distance(pl[3]));
+ ASSERT(pf[0].Distance(pl[3]) < eps2d);
+
+// for (int i=0; i<4; i++)
+// {
+// SCRUTE(quad->isEdgeForward[i]);
+// MESSAGE(" -first "<<i<<" "<<pf[i].X()<<" "<<pf[i].Y());
+// MESSAGE(" -last "<<i<<" "<<pl[i].X()<<" "<<pl[i].Y());
+// }
+
+ // 2 --- load 2d edge points (u,v) with orientation and value on unit square
+
+ for (int i=0; i<2; i++)
+ {
+ quad->uv_edges[i] = LoadEdgePoints(aMesh, F,
+ quad->edge[i],
+ quad->first[i],
+ quad->last[i]);
+
+ // quad->isEdgeForward[i]);
+ }
+ for (int i=2; i<4; i++)
+ {
+ quad->uv_edges[i] = LoadEdgePoints(aMesh, F,
+ quad->edge[i],
+ quad->last[i],
+ quad->first[i]);
+
+ // !quad->isEdgeForward[i]);
+ }
+
+ // 3 --- 2D normalized values on unit square [0..1][0..1]
+
+ int nbdown = quad->nbPts[0];
+ int nbright = quad->nbPts[1];
+ quad->uv_grid = new UVPtStruct[nbright*nbdown];
+
+ UVPtStruct* uv_grid = quad->uv_grid;
+ UVPtStruct* uv_e0 = quad->uv_edges[0];
+ UVPtStruct* uv_e1 = quad->uv_edges[1];
+ UVPtStruct* uv_e2 = quad->uv_edges[2];
+ UVPtStruct* uv_e3 = quad->uv_edges[3];
+ gp_Pnt2d a0 = pf[0];
+ gp_Pnt2d a1 = pf[1];
+ gp_Pnt2d a2 = pf[2];
+ gp_Pnt2d a3 = pf[3];
+
+ // nodes Id on edges
+
+ int j = 0;
+ for (int i=0; i<nbdown; i++)
+ {
+ int ij = j*nbdown +i;
+ uv_grid[ij].nodeId = uv_e0[i].nodeId;
+ }
+ i = nbdown-1;
+ for (int j=0; j<nbright; j++)
+ {
+ int ij = j*nbdown +i;
+ uv_grid[ij].nodeId = uv_e1[j].nodeId;
+ }
+ j = nbright -1;
+ for (int i=0; i<nbdown; i++)
+ {
+ int ij = j*nbdown +i;
+ uv_grid[ij].nodeId = uv_e2[i].nodeId;
+ }
+ i = 0;
+ for (int j=0; j<nbright; j++)
+ {
+ int ij = j*nbdown +i;
+ uv_grid[ij].nodeId = uv_e3[j].nodeId;
+ }
+
+ // normalized 2d values on grid
+
+ for (int i=0; i<nbdown; i++)
+ for (int j=0; j<nbright; j++)
+ {
+ int ij = j*nbdown +i;
+ // --- droite i cste : x = x0 + y(x1-x0)
+ double x0 = uv_e0[i].normParam; // bas - sud
+ double x1 = uv_e2[i].normParam; // haut - nord
+ // --- droite j cste : y = y0 + x(y1-y0)
+ double y0 = uv_e3[j].normParam; // gauche-ouest
+ double y1 = uv_e1[j].normParam; // droite - est
+ // --- intersection : x=x0+(y0+x(y1-y0))(x1-x0)
+ double x=(x0+y0*(x1-x0))/(1-(y1-y0)*(x1-x0));
+ double y=y0+x*(y1-y0);
+ uv_grid[ij].x = x;
+ uv_grid[ij].y = y;
+ //MESSAGE("-xy-01 "<<x0<<" "<<x1<<" "<<y0<<" "<<y1);
+ //MESSAGE("-xy-norm "<<i<<" "<<j<<" "<<x<<" "<<y);
+ }
+
+ // 4 --- projection on 2d domain (u,v)
+
+ for (int i=0; i<nbdown; i++)
+ for (int j=0; j<nbright; j++)
+ {
+ int ij = j*nbdown +i;
+ double x = uv_grid[ij].x;
+ double y = uv_grid[ij].y;
+ double param_0 = uv_e0[0].param
+ + x*(uv_e0[nbdown-1].param -uv_e0[0].param); // sud
+ double param_2 = uv_e2[0].param
+ + x*(uv_e2[nbdown-1].param -uv_e2[0].param); // nord
+ double param_1 = uv_e1[0].param
+ + y*(uv_e1[nbright-1].param -uv_e1[0].param); // est
+ double param_3 = uv_e3[0].param
+ + y*(uv_e3[nbright-1].param -uv_e3[0].param); // ouest
+
+ //MESSAGE("params "<<param_0<<" "<<param_1<<" "<<param_2<<" "<<param_3);
+ gp_Pnt2d p0 = c2d[0]->Value(param_0);
+ gp_Pnt2d p1 = c2d[1]->Value(param_1);
+ gp_Pnt2d p2 = c2d[2]->Value(param_2);
+ gp_Pnt2d p3 = c2d[3]->Value(param_3);
+
+ double u = (1-y)*p0.X() + x*p1.X() + y*p2.X() + (1-x)*p3.X();
+ double v = (1-y)*p0.Y() + x*p1.Y() + y*p2.Y() + (1-x)*p3.Y();
+
+ u -= (1-x)*(1-y)*a0.X() + x*(1-y)*a1.X() + x*y*a2.X() + (1-x)*y*a3.X();
+ v -= (1-x)*(1-y)*a0.Y() + x*(1-y)*a1.Y() + x*y*a2.Y() + (1-x)*y*a3.Y();
+
+ uv_grid[ij].u = u;
+ uv_grid[ij].v = v;
+
+ //MESSAGE("-uv- "<<i<<" "<<j<<" "<<uv_grid[ij].u<<" "<<uv_grid[ij].v);
+ }
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+UVPtStruct* SMESH_Quadrangle_2D::LoadEdgePoints(SMESH_Mesh& aMesh,
+ const TopoDS_Face& F,
+ const TopoDS_Edge& E,
+ double first,
+ double last)
+ // bool isForward)
+{
+ //MESSAGE("SMESH_Quadrangle_2D::LoadEdgePoints");
+
+ Handle (SMDS_Mesh) meshDS = aMesh.GetMeshDS();
+
+ // --- IDNodes of first and last Vertex
+
+ TopoDS_Vertex VFirst, VLast;
+ TopExp::Vertices(E, VFirst, VLast); // corresponds to f and l
+
+ ASSERT(!VFirst.IsNull());
+ SMESH_subMesh* firstSubMesh = aMesh.GetSubMesh(VFirst);
+ const TColStd_ListOfInteger& lidf
+ = firstSubMesh->GetSubMeshDS()->GetIDNodes();
+ int idFirst= lidf.First();
+ //SCRUTE(idFirst);
+
+ ASSERT(!VLast.IsNull());
+ SMESH_subMesh* lastSubMesh = aMesh.GetSubMesh(VLast);
+ const TColStd_ListOfInteger& lidl
+ = lastSubMesh->GetSubMeshDS()->GetIDNodes();
+ int idLast= lidl.First();
+ //SCRUTE(idLast);
+
+ // --- edge internal IDNodes (relies on good order storage, not checked)
+
+ int nbPoints = aMesh.GetSubMesh(E)->GetSubMeshDS()->NbNodes();
+ //SCRUTE(nbPoints);
+ UVPtStruct * uvslf = new UVPtStruct[nbPoints+2];
+
+ double f,l;
+ Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E,F,f,l);
+
+ const TColStd_ListOfInteger& indElt
+ = aMesh.GetSubMesh(E)->GetSubMeshDS()->GetIDNodes();
+ TColStd_ListIteratorOfListOfInteger ite(indElt);
+ //SCRUTE(nbPoints);
+ //SCRUTE(indElt.Extent());
+ ASSERT(nbPoints == indElt.Extent());
+
+ map<double,int> params;
+ for (; ite.More(); ite.Next())
+ {
+ int nodeId = ite.Value();
+ Handle (SMDS_MeshElement) elt = meshDS->FindNode(nodeId);
+ Handle (SMDS_MeshNode) node = meshDS->GetNode(1, elt);
+ Handle (SMDS_EdgePosition) epos
+ = Handle (SMDS_EdgePosition)::DownCast(node->GetPosition());
+ double param = epos->GetUParameter();
+ params[param] = nodeId;
+ }
+
+ bool isForward = (((l-f)*(last-first)) > 0);
+ double paramin = 0;
+ double paramax = 0;
+ if (isForward)
+ {
+ paramin = f;
+ paramax = l;
+ gp_Pnt2d p = C2d->Value(f); // first point = Vertex Forward
+ uvslf [0].x = p.X();
+ uvslf [0].y = p.Y();
+ uvslf [0].param = f;
+ uvslf [0].nodeId = idFirst;
+ //MESSAGE("__ f "<<f<<" "<<uvslf[0].x <<" "<<uvslf[0].y);
+ map<double,int>::iterator itp = params.begin();
+ for (int i = 1; i <= nbPoints; i++) // nbPoints internal
+ {
+ double param = (*itp).first;
+ int nodeId = (*itp).second;
+ gp_Pnt2d p = C2d->Value(param);
+ uvslf [i].x = p.X();
+ uvslf [i].y = p.Y();
+ uvslf[i].param = param;
+ uvslf[i].nodeId = nodeId;
+ //MESSAGE("__ "<<i<<" "<<param<<" "<<uvslf[i].x <<" "<<uvslf[i].y);
+ itp++;
+ }
+ p = C2d->Value(l); // last point = Vertex Reversed
+ uvslf [nbPoints+1].x = p.X();
+ uvslf [nbPoints+1].y = p.Y();
+ uvslf [nbPoints+1].param = l;
+ uvslf [nbPoints+1].nodeId = idLast;
+ //MESSAGE("__ l "<<l<<" "<<uvslf[nbPoints+1].x <<" "<<uvslf[nbPoints+1].y);
+ }
+ else
+ {
+ paramin = l;
+ paramax = f;
+ gp_Pnt2d p = C2d->Value(l); // first point = Vertex Reversed
+ uvslf [0].x = p.X();
+ uvslf [0].y = p.Y();
+ uvslf [0].param = l;
+ uvslf [0].nodeId = idLast;
+ //MESSAGE("__ l "<<l<<" "<<uvslf[0].x <<" "<<uvslf[0].y);
+ map<double,int>::reverse_iterator itp = params.rbegin();
+ for (int j = nbPoints; j >= 1; j--) // nbPoints internal
+ {
+ double param = (*itp).first;
+ int nodeId = (*itp).second;
+ int i = nbPoints +1 -j;
+ gp_Pnt2d p = C2d->Value(param);
+ uvslf [i].x = p.X();
+ uvslf [i].y = p.Y();
+ uvslf[i].param = param;
+ uvslf[i].nodeId = nodeId;
+ //MESSAGE("__ "<<i<<" "<<param<<" "<<uvslf[i].x <<" "<<uvslf[i].y);
+ itp++;
+ }
+ p = C2d->Value(f); // last point = Vertex Forward
+ uvslf [nbPoints+1].x = p.X();
+ uvslf [nbPoints+1].y = p.Y();
+ uvslf [nbPoints+1].param = f;
+ uvslf [nbPoints+1].nodeId = idFirst;
+ //MESSAGE("__ f "<<f<<" "<<uvslf[nbPoints+1].x <<" "<<uvslf[nbPoints+1].y);
+ }
+
+ ASSERT(paramin != paramax);
+ for (int i = 0; i< nbPoints+2; i++)
+ {
+ uvslf[i].normParam = (uvslf[i].param -paramin)/(paramax -paramin);
+ //SCRUTE(uvslf[i].normParam);
+ }
+
+ return uvslf;
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+ostream & SMESH_Quadrangle_2D::SaveTo(ostream & save)
+{
+ return save << this;
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+istream & SMESH_Quadrangle_2D::LoadFrom(istream & load)
+{
+ return load >> (*this);
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+ostream & operator << (ostream & save, SMESH_Quadrangle_2D & hyp)
+{
+ return save;
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+
+istream & operator >> (istream & load, SMESH_Quadrangle_2D & hyp)
+{
+ return load;
+}
