// Gmsh - Copyright (C) 1997-2014 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// bugs and problems to the public mailing list <gmsh@geuz.org>.

#include "GmshConfig.h"
#include "GmshMessage.h"
#include "GModelIO_SGEOM.h"
#include "Context.h"
// #include "OCCVertex.h"
// #include "OCCEdge.h"
// #include "OCCFace.h"
// #include "OCCRegion.h"
#include "MElement.h"
#include "MLine.h"
#include "OpenFile.h"
// #include "OCC_Connect.h"

#if defined(HAVE_SGEOM) && defined(HAVE_OCC)

// #if defined(HAVE_SALOME)
// #include "Partition_Spliter.hxx"
// #endif

// void addSimpleShapes(TopoDS_Shape theShape, TopTools_ListOfShape &theList);
// 
// void SGEOM_Internals::buildLists()
// {
//   somap.Clear();
//   shmap.Clear();
//   fmap.Clear();
//   wmap.Clear();
//   emap.Clear();
//   vmap.Clear();
//   addShapeToLists(shape);
// }
// 
// void SGEOM_Internals::buildShapeFromLists(TopoDS_Shape _shape)
// {
//   BRep_Builder B;
//   TopoDS_Compound C;
//   B.MakeCompound(C);
// 
//   TopTools_ListOfShape theList;
//   addSimpleShapes(_shape, theList);
//   TopTools_ListIteratorOfListOfShape itSub1(theList);
//   for (; itSub1.More(); itSub1.Next()) B.Add(C, itSub1.Value());
// 
//   for(int i = 1; i <= vmap.Extent(); i++) B.Add(C, vmap(i));
//   for(int i = 1; i <= emap.Extent(); i++) B.Add(C, emap(i));
//   for(int i = 1; i <= wmap.Extent(); i++) B.Add(C, wmap(i));
//   for(int i = 1; i <= fmap.Extent(); i++) B.Add(C, fmap(i));
//   for(int i = 1; i <= shmap.Extent(); i++) B.Add(C, shmap(i));
//   for(int i = 1; i <= somap.Extent(); i++) B.Add(C, somap(i));
//   shape = C;
// }
// 
// void SGEOM_Internals::addShapeToLists(TopoDS_Shape _shape)
// {
//   // Solids
//   TopExp_Explorer exp0, exp1, exp2, exp3, exp4, exp5;
//   for(exp0.Init(_shape, TopAbs_SOLID); exp0.More(); exp0.Next()){
//     TopoDS_Solid solid = TopoDS::Solid(exp0.Current());
//     if(somap.FindIndex(solid) < 1){
//       somap.Add(solid);
// 
//       for(exp1.Init(solid, TopAbs_SHELL); exp1.More(); exp1.Next()){
//         TopoDS_Shell shell = TopoDS::Shell(exp1.Current());
//         if(shmap.FindIndex(shell) < 1){
//           shmap.Add(shell);
// 
//           for(exp2.Init(shell, TopAbs_FACE); exp2.More(); exp2.Next()){
//             TopoDS_Face face = TopoDS::Face(exp2.Current());
//             if(fmap.FindIndex(face) < 1){
//               fmap.Add(face);
// 
//               for(exp3.Init(exp2.Current(), TopAbs_WIRE); exp3.More(); exp3.Next()){
//                 TopoDS_Wire wire = TopoDS::Wire(exp3.Current());
//                 if(wmap.FindIndex(wire) < 1){
//                   wmap.Add(wire);
// 
//                   for(exp4.Init(exp3.Current(), TopAbs_EDGE); exp4.More(); exp4.Next()){
//                     TopoDS_Edge edge = TopoDS::Edge(exp4.Current());
//                     if(emap.FindIndex(edge) < 1){
//                       emap.Add(edge);
// 
//                       for(exp5.Init(exp4.Current(), TopAbs_VERTEX); exp5.More(); exp5.Next()){
//                         TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//                         if(vmap.FindIndex(vertex) < 1)
//                           vmap.Add(vertex);
//                       }
//                     }
//                   }
//                 }
//               }
//             }
//           }
//         }
//       }
//     }
//   }
// 
//   // Free Shells
//   for(exp1.Init(exp0.Current(), TopAbs_SHELL, TopAbs_SOLID); exp1.More(); exp1.Next()){
//     TopoDS_Shape shell = exp1.Current();
//     if(shmap.FindIndex(shell) < 1){
//       shmap.Add(shell);
// 
//       for(exp2.Init(shell, TopAbs_FACE); exp2.More(); exp2.Next()){
//         TopoDS_Face face = TopoDS::Face(exp2.Current());
//         if(fmap.FindIndex(face) < 1){
//           fmap.Add(face);
// 
//           for(exp3.Init(exp2.Current(), TopAbs_WIRE); exp3.More(); exp3.Next()){
//             TopoDS_Wire wire = TopoDS::Wire(exp3.Current());
//             if(wmap.FindIndex(wire) < 1){
//               wmap.Add(wire);
// 
//               for(exp4.Init(exp3.Current(), TopAbs_EDGE); exp4.More(); exp4.Next()){
//                 TopoDS_Edge edge = TopoDS::Edge(exp4.Current());
//                 if(emap.FindIndex(edge) < 1){
//                   emap.Add(edge);
// 
//                   for(exp5.Init(exp4.Current(), TopAbs_VERTEX); exp5.More(); exp5.Next()){
//                     TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//                     if(vmap.FindIndex(vertex) < 1)
//                       vmap.Add(vertex);
//                   }
//                 }
//               }
//             }
//           }
//         }
//       }
//     }
//   }
// 
//   // Free Faces
//   for(exp2.Init(_shape, TopAbs_FACE, TopAbs_SHELL); exp2.More(); exp2.Next()){
//     TopoDS_Face face = TopoDS::Face(exp2.Current());
//     if(fmap.FindIndex(face) < 1){
//       fmap.Add(face);
// 
//       for(exp3.Init(exp2.Current(), TopAbs_WIRE); exp3.More(); exp3.Next()){
//         TopoDS_Wire wire = TopoDS::Wire(exp3.Current());
//         if(wmap.FindIndex(wire) < 1){
//           wmap.Add(wire);
// 
//           for(exp4.Init(exp3.Current(), TopAbs_EDGE); exp4.More(); exp4.Next()){
//             TopoDS_Edge edge = TopoDS::Edge(exp4.Current());
//             if(emap.FindIndex(edge) < 1){
//               emap.Add(edge);
// 
//               for(exp5.Init(exp4.Current(), TopAbs_VERTEX); exp5.More(); exp5.Next()){
//                 TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//                 if(vmap.FindIndex(vertex) < 1)
//                   vmap.Add(vertex);
//               }
//             }
//           }
//         }
//       }
//     }
//   }
// 
//   // Free Wires
//   for(exp3.Init(_shape, TopAbs_WIRE, TopAbs_FACE); exp3.More(); exp3.Next()){
//     TopoDS_Wire wire = TopoDS::Wire(exp3.Current());
//     if(wmap.FindIndex(wire) < 1){
//       wmap.Add(wire);
// 
//       for(exp4.Init(exp3.Current(), TopAbs_EDGE); exp4.More(); exp4.Next()){
//         TopoDS_Edge edge = TopoDS::Edge(exp4.Current());
//         if(emap.FindIndex(edge) < 1){
//           emap.Add(edge);
// 
//           for(exp5.Init(exp4.Current(), TopAbs_VERTEX); exp5.More(); exp5.Next()){
//             TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//             if(vmap.FindIndex(vertex) < 1)
//               vmap.Add(vertex);
//           }
//         }
//       }
//     }
//   }
// 
//   // Free Edges
//   for(exp4.Init(_shape, TopAbs_EDGE, TopAbs_WIRE); exp4.More(); exp4.Next()){
//     TopoDS_Edge edge = TopoDS::Edge(exp4.Current());
//     if(emap.FindIndex(edge) < 1){
//       emap.Add(edge);
// 
//       for(exp5.Init(exp4.Current(), TopAbs_VERTEX); exp5.More(); exp5.Next()){
//         TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//         if(vmap.FindIndex(vertex) < 1)
//           vmap.Add(vertex);
//       }
//     }
//   }
// 
//   // Free Vertices
//   for(exp5.Init(_shape, TopAbs_VERTEX, TopAbs_EDGE); exp5.More(); exp5.Next()){
//     TopoDS_Vertex vertex = TopoDS::Vertex(exp5.Current());
//     if(vmap.FindIndex(vertex) < 1)
//       vmap.Add(vertex);
//   }
// 
// }
// 
// void SGEOM_Internals::healGeometry(double tolerance, bool fixdegenerated,
//                                  bool fixsmalledges, bool fixspotstripfaces,
//                                  bool sewfaces, bool makesolids, bool connect)
// {
//   if(!fixdegenerated && !fixsmalledges && !fixspotstripfaces &&
//      !sewfaces && !makesolids && !connect) return;
// 
//   Msg::Info("Starting geometry healing procedure (tolerance: %g)", tolerance);
// 
//   buildLists();
//   TopExp_Explorer exp0, exp1;
//   int nrc = 0, nrcs = 0;
//   int nrso = somap.Extent(), nrsh = shmap.Extent(), nrf = fmap.Extent();
//   int nrw = wmap.Extent(), nre = emap.Extent(), nrv = vmap.Extent();
//   for(exp0.Init(shape, TopAbs_COMPOUND); exp0.More(); exp0.Next()) nrc++;
//   for(exp0.Init(shape, TopAbs_COMPSOLID); exp0.More(); exp0.Next()) nrcs++;
// 
//   double surfacecont = 0;
//   for(exp0.Init(shape, TopAbs_FACE); exp0.More(); exp0.Next()){
//     TopoDS_Face face = TopoDS::Face(exp0.Current());
//     GProp_GProps system;
//     BRepGProp::SurfaceProperties(face, system);
//     surfacecont += system.Mass();
//   }
// 
//   if(fixdegenerated){
//     Msg::Info("- fix degenerated edges and faces");
// 
//     {
//       Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//       rebuild->Apply(shape);
//       for(exp1.Init(shape, TopAbs_EDGE); exp1.More(); exp1.Next()){
//         TopoDS_Edge edge = TopoDS::Edge(exp1.Current());
//         if(BRep_Tool::Degenerated(edge))
//           rebuild->Remove(edge, false);
//       }
//       shape = rebuild->Apply(shape);
//     }
//     buildLists();
// 
//     {
//       Handle(ShapeFix_Face) sff;
//       Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//       rebuild->Apply(shape);
// 
//       for(exp0.Init(shape, TopAbs_FACE); exp0.More(); exp0.Next()){
//         TopoDS_Face face = TopoDS::Face(exp0.Current());
// 
//         sff = new ShapeFix_Face(face);
//         sff->FixAddNaturalBoundMode() = Standard_True;
//         sff->FixSmallAreaWireMode() = Standard_True;
//         sff->Perform();
// 
//         if(sff->Status(ShapeExtend_DONE1) ||
//            sff->Status(ShapeExtend_DONE2) ||
//            sff->Status(ShapeExtend_DONE3) ||
//            sff->Status(ShapeExtend_DONE4) ||
//            sff->Status(ShapeExtend_DONE5))
//           {
//             Msg::Info("  repaired face %d", fmap.FindIndex(face));
//             if(sff->Status(ShapeExtend_DONE1))
//               Msg::Info("  (some wires are fixed)");
//             else if(sff->Status(ShapeExtend_DONE2))
//               Msg::Info("  (orientation of wires fixed)");
//             else if(sff->Status(ShapeExtend_DONE3))
//               Msg::Info("  (missing seam added)");
//             else if(sff->Status(ShapeExtend_DONE4))
//               Msg::Info("  (small area wire removed)");
//             else if(sff->Status(ShapeExtend_DONE5))
//               Msg::Info("  (natural bounds added)");
//             TopoDS_Face newface = sff->Face();
// 
//             rebuild->Replace(face, newface, Standard_False);
//           }
//       }
//       shape = rebuild->Apply(shape);
//     }
// 
//     {
//       Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//       rebuild->Apply(shape);
//       for(exp1.Init(shape, TopAbs_EDGE); exp1.More(); exp1.Next()){
//         TopoDS_Edge edge = TopoDS::Edge(exp1.Current());
//         if(BRep_Tool::Degenerated(edge))
//           rebuild->Remove(edge, false);
//       }
//       shape = rebuild->Apply(shape);
//     }
//   }
// 
//   if(fixsmalledges){
//     Msg::Info("- fixing small edges");
// 
//     Handle(ShapeFix_Wire) sfw;
//     Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//     rebuild->Apply(shape);
// 
//     for(exp0.Init(shape, TopAbs_FACE); exp0.More(); exp0.Next()){
//       TopoDS_Face face = TopoDS::Face(exp0.Current());
// 
//       for(exp1.Init(face, TopAbs_WIRE); exp1.More(); exp1.Next()){
//         TopoDS_Wire oldwire = TopoDS::Wire(exp1.Current());
//         sfw = new ShapeFix_Wire(oldwire, face ,tolerance);
//         sfw->ModifyTopologyMode() = Standard_True;
// 
//         sfw->ClosedWireMode() = Standard_True;
// 
//         bool replace = false;
//         replace = sfw->FixReorder() || replace;
//         replace = sfw->FixConnected() || replace;
// 
//         if(sfw->FixSmall(Standard_False, tolerance) &&
//            ! (sfw->StatusSmall(ShapeExtend_FAIL1) ||
//               sfw->StatusSmall(ShapeExtend_FAIL2) ||
//               sfw->StatusSmall(ShapeExtend_FAIL3))){
//           Msg::Info("  fixed small edge in wire %d", wmap.FindIndex(oldwire));
//           replace = true;
//         }
//         else if(sfw->StatusSmall(ShapeExtend_FAIL1))
//           Msg::Warning("Failed to fix small edge in wire %d, edge cannot be checked "
//                        "(no 3d curve and no pcurve)", wmap.FindIndex(oldwire));
//         else if(sfw->StatusSmall(ShapeExtend_FAIL2))
//           Msg::Warning("Failed to fix small edge in wire %d, "
//                        "edge is null-length and has different vertives at begin and "
//                        "end, and lockvtx is True or ModifiyTopologyMode is False",
//                        wmap.FindIndex(oldwire));
//         else if(sfw->StatusSmall(ShapeExtend_FAIL3))
//           Msg::Warning("Failed to fix small edge in wire, CheckConnected has failed",
//                        wmap.FindIndex(oldwire));
// 
//         replace = sfw->FixEdgeCurves() || replace;
//         replace = sfw->FixDegenerated() || replace;
//         replace = sfw->FixSelfIntersection() || replace;
//         replace = sfw->FixLacking(Standard_True) || replace;
//         if(replace){
//           TopoDS_Wire newwire = sfw->Wire();
//           rebuild->Replace(oldwire, newwire, Standard_False);
//         }
//       }
//     }
// 
//     shape = rebuild->Apply(shape);
// 
//     {
//       buildLists();
//       Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//       rebuild->Apply(shape);
// 
//       for(exp1.Init(shape, TopAbs_EDGE); exp1.More(); exp1.Next()){
//         TopoDS_Edge edge = TopoDS::Edge(exp1.Current());
//         if(vmap.FindIndex(TopExp::FirstVertex(edge)) ==
//            vmap.FindIndex(TopExp::LastVertex(edge))){
//           GProp_GProps system;
//           BRepGProp::LinearProperties(edge, system);
//           if(system.Mass() < tolerance){
//             Msg::Info("  removing degenerated edge %d from vertex %d to vertex %d",
//                       emap.FindIndex(edge), vmap.FindIndex(TopExp::FirstVertex(edge)),
//                       vmap.FindIndex(TopExp::LastVertex(edge)));
//             rebuild->Remove(edge, false);
//           }
//         }
//       }
//       shape = rebuild->Apply(shape);
//     }
// 
//     {
//       Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//       rebuild->Apply(shape);
//       for(exp1.Init(shape, TopAbs_EDGE); exp1.More(); exp1.Next()){
//         TopoDS_Edge edge = TopoDS::Edge(exp1.Current());
//         if(BRep_Tool::Degenerated(edge) )
//           rebuild->Remove(edge, false);
//       }
//       shape = rebuild->Apply(shape);
//     }
// 
//     Handle(ShapeFix_Wireframe) sfwf = new ShapeFix_Wireframe;
//     sfwf->SetPrecision(tolerance);
//     sfwf->Load(shape);
//     sfwf->ModeDropSmallEdges() = Standard_True;
// 
//     if(sfwf->FixWireGaps()){
//       Msg::Info("- fixing wire gaps");
//       if(sfwf->StatusWireGaps(ShapeExtend_OK))
//         Msg::Info("  no gaps found");
//       if(sfwf->StatusWireGaps(ShapeExtend_DONE1))
//         Msg::Info("  some 2D gaps fixed");
//       if(sfwf->StatusWireGaps(ShapeExtend_DONE2))
//         Msg::Info("  some 3D gaps fixed");
//       if(sfwf->StatusWireGaps(ShapeExtend_FAIL1))
//         Msg::Info("  failed to fix some 2D gaps");
//       if(sfwf->StatusWireGaps(ShapeExtend_FAIL2))
//         Msg::Info("  failed to fix some 3D gaps");
//     }
// 
//     sfwf->SetPrecision(tolerance);
// 
//     if(sfwf->FixSmallEdges()){
//       Msg::Info("- fixing wire frames");
//       if(sfwf->StatusSmallEdges(ShapeExtend_OK))
//         Msg::Info("  no small edges found");
//       if(sfwf->StatusSmallEdges(ShapeExtend_DONE1))
//         Msg::Info("  some small edges fixed");
//       if(sfwf->StatusSmallEdges(ShapeExtend_FAIL1))
//         Msg::Info("  failed to fix some small edges");
//     }
// 
//     shape = sfwf->Shape();
//   }
// 
//   if(fixspotstripfaces){
//     Msg::Info("- fixing spot and strip faces");
//     Handle(ShapeFix_FixSmallFace) sffsm = new ShapeFix_FixSmallFace();
//     sffsm->Init(shape);
//     sffsm->SetPrecision(tolerance);
//     sffsm->Perform();
// 
//     shape = sffsm->FixShape();
//   }
// 
//   if(sewfaces){
//     Msg::Info("- sewing faces");
// 
//     BRepOffsetAPI_Sewing sewedObj(tolerance);
// 
//     for(exp0.Init(shape, TopAbs_FACE); exp0.More(); exp0.Next()){
//       TopoDS_Face face = TopoDS::Face(exp0.Current());
//       sewedObj.Add(face);
//     }
// 
//     sewedObj.Perform();
// 
//     if(!sewedObj.SewedShape().IsNull())
//       shape = sewedObj.SewedShape();
//     else
//       Msg::Info("  not possible");
//   }
// 
//   {
//     Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//     rebuild->Apply(shape);
//     for(exp1.Init(shape, TopAbs_EDGE); exp1.More(); exp1.Next()){
//       TopoDS_Edge edge = TopoDS::Edge(exp1.Current());
//       if(BRep_Tool::Degenerated(edge))
//         rebuild->Remove(edge, false);
//     }
//     shape = rebuild->Apply(shape);
//   }
// 
//   if(makesolids){
//     Msg::Info("- making solids");
// 
//     BRepBuilderAPI_MakeSolid ms;
//     int count = 0;
//     for(exp0.Init(shape, TopAbs_SHELL); exp0.More(); exp0.Next()){
//       count++;
//       ms.Add(TopoDS::Shell(exp0.Current()));
//     }
// 
//     if(!count){
//       Msg::Info("  not possible (no shells)");
//     }
//     else{
//       BRepCheck_Analyzer ba(ms);
//       if(ba.IsValid()){
//         Handle(ShapeFix_Shape) sfs = new ShapeFix_Shape;
//         sfs->Init(ms);
//         sfs->SetPrecision(tolerance);
//         sfs->SetMaxTolerance(tolerance);
//         sfs->Perform();
//         shape = sfs->Shape();
// 
//         for(exp0.Init(shape, TopAbs_SOLID); exp0.More(); exp0.Next()){
//           TopoDS_Solid solid = TopoDS::Solid(exp0.Current());
//           TopoDS_Solid newsolid = solid;
//           BRepLib::OrientClosedSolid(newsolid);
//           Handle_ShapeBuild_ReShape rebuild = new ShapeBuild_ReShape;
//           //		  rebuild->Apply(shape);
//           rebuild->Replace(solid, newsolid, Standard_False);
//           TopoDS_Shape newshape = rebuild->Apply(shape, TopAbs_COMPSOLID);//, 1);
//           //		  TopoDS_Shape newshape = rebuild->Apply(shape);
//           shape = newshape;
//         }
//       }
//       else
//         Msg::Info("  not possible");
//     }
//   }
// 
//   if(connect){
// #if defined(HAVE_SALOME)
//     Msg::Info("- cutting and connecting faces with Salome's Partition_Spliter");
//     TopExp_Explorer e2;
//     Partition_Spliter ps;
//     for(e2.Init(shape, TopAbs_SOLID); e2.More(); e2.Next())
//       ps.AddShape(e2.Current());
//     try{
//       ps.Compute();
//       shape = ps.Shape();
//     }
//     catch(Standard_Failure &err){
//       Msg::Error("%s", err.GetMessageString());
//     }
// #else
//     Msg::Info("- cutting and connecting faces with OCC_Connect");
//     OCC_Connect connect(1);
//     for(TopExp_Explorer p(shape, TopAbs_SOLID); p.More(); p.Next())
//       connect.Add(p.Current());
//     connect.Connect();
//     shape = connect;
// #endif
//   }
// 
//   double newsurfacecont = 0;
//   for(exp0.Init(shape, TopAbs_FACE); exp0.More(); exp0.Next()){
//     TopoDS_Face face = TopoDS::Face(exp0.Current());
//     GProp_GProps system;
//     BRepGProp::SurfaceProperties(face, system);
//     newsurfacecont += system.Mass();
//   }
// 
//   buildLists();
//   int nnrc = 0, nnrcs = 0;
//   int nnrso = somap.Extent(), nnrsh = shmap.Extent(), nnrf = fmap.Extent();
//   int nnrw = wmap.Extent(), nnre = emap.Extent(), nnrv = vmap.Extent();
//   for(exp0.Init(shape, TopAbs_COMPOUND); exp0.More(); exp0.Next()) nnrc++;
//   for(exp0.Init(shape, TopAbs_COMPSOLID); exp0.More(); exp0.Next()) nnrcs++;
// 
//   Msg::Info("-----------------------------------");
//   Msg::Info("Compounds          : %d (%d)", nnrc, nrc);
//   Msg::Info("Composite solids   : %d (%d)", nnrcs, nrcs);
//   Msg::Info("Solids             : %d (%d)", nnrso, nrso);
//   Msg::Info("Shells             : %d (%d)", nnrsh, nrsh);
//   Msg::Info("Wires              : %d (%d)", nnrw, nrw);
//   Msg::Info("Faces              : %d (%d)", nnrf, nrf);
//   Msg::Info("Edges              : %d (%d)", nnre, nre);
//   Msg::Info("Vertices           : %d (%d)", nnrv, nrv );
//   Msg::Info("Totol surface area : %g (%g)", newsurfacecont, surfacecont);
//   Msg::Info("-----------------------------------");
// }
// 
// void SGEOM_Internals::loadBREP(const char *fn)
// {
//   BRep_Builder aBuilder;
//   BRepTools::Read(shape, (char*)fn, aBuilder);
//   BRepTools::Clean(shape);
//   healGeometry(CTX::instance()->geom.tolerance,
//                CTX::instance()->geom.occFixDegenerated,
//                CTX::instance()->geom.occFixSmallEdges,
//                CTX::instance()->geom.occFixSmallFaces,
//                CTX::instance()->geom.occSewFaces,
//                false,
//                CTX::instance()->geom.occConnectFaces);
//   BRepTools::Clean(shape);
//   buildLists();
// }
// 
// void SGEOM_Internals::writeBREP(const char *fn)
// {
//   std::ofstream myFile;
//   myFile.open(fn);
//   try {
//     BRepTools::Write(shape, myFile);
//   }
//   catch(Standard_Failure &err){
//     Msg::Error("%s", err.GetMessageString());
//   }
//   myFile.close();
// }
// 
// void SGEOM_Internals::loadSTEP(const char *fn)
// {
//   STEPControl_Reader reader;
//   reader.ReadFile((char*)fn);
//   reader.NbRootsForTransfer();
//   reader.TransferRoots();
//   shape = reader.OneShape();
//   BRepTools::Clean(shape);
//   healGeometry(CTX::instance()->geom.tolerance,
//                CTX::instance()->geom.occFixDegenerated,
//                CTX::instance()->geom.occFixSmallEdges,
//                CTX::instance()->geom.occFixSmallFaces,
//                CTX::instance()->geom.occSewFaces,
//                false,
//                CTX::instance()->geom.occConnectFaces);
//   BRepTools::Clean(shape);
//   buildLists();
// }
// 
// void SGEOM_Internals::writeSTEP(const char *fn)
// {
//   STEPControl_Writer writer;
//   IFSelect_ReturnStatus status = writer.Transfer(shape, STEPControl_ManifoldSolidBrep);
//   if(status == IFSelect_RetDone)
//     status = writer.Write((char*)fn);
// }
// 
// void SGEOM_Internals::loadIGES(const char *fn)
// {
//   IGESControl_Reader reader;
//   reader.ReadFile((char*)fn);
//   reader.NbRootsForTransfer();
//   reader.TransferRoots();
//   shape = reader.OneShape();
//   BRepTools::Clean(shape);
//   healGeometry(CTX::instance()->geom.tolerance,
//                CTX::instance()->geom.occFixDegenerated,
//                CTX::instance()->geom.occFixSmallEdges,
//                CTX::instance()->geom.occFixSmallFaces,
//                CTX::instance()->geom.occSewFaces,
//                false,
//                CTX::instance()->geom.occConnectFaces);
//   BRepTools::Clean(shape);
//   buildLists();
// }
// 
// void SGEOM_Internals::loadShape(const TopoDS_Shape *s)
// {
//   shape = *s;
//   BRepTools::Clean(shape);
//   buildLists();
// }
// 
// GVertex *SGEOM_Internals::getOCCVertexByNativePtr(GModel *model, TopoDS_Vertex toFind)
// {
//   if(gvNumCache.IsBound(toFind))
//     return model->getVertexByTag(gvNumCache.Find(toFind));
//   return 0;
// }
// 
// GEdge *SGEOM_Internals::getOCCEdgeByNativePtr(GModel *model, TopoDS_Edge toFind)
// {
//   if(geNumCache.IsBound(toFind))
//     return model->getEdgeByTag(geNumCache.Find(toFind));
//   return 0;
// }
// 
// GFace *SGEOM_Internals::getOCCFaceByNativePtr(GModel *model, TopoDS_Face toFind)
// {
//   if(gfNumCache.IsBound(toFind))
//     return model->getFaceByTag(gfNumCache.Find(toFind));
//   return 0;
// }
// 
// GRegion *SGEOM_Internals::getOCCRegionByNativePtr(GModel *model, TopoDS_Solid toFind)
// {
//   if(grNumCache.IsBound(toFind))
//     return model->getRegionByTag(grNumCache.Find(toFind));
//   return 0;
// }
// 
// GVertex *SGEOM_Internals::addVertexToModel(GModel *model, TopoDS_Vertex vertex)
// {
//   GVertex *gv = getOCCVertexByNativePtr(model, vertex);
//   if(gv) return gv;
//   addShapeToLists(vertex);
//   buildShapeFromLists(vertex);
//   buildGModel(model);
//   return getOCCVertexByNativePtr(model, vertex);
// }
// 
// GEdge *SGEOM_Internals::addEdgeToModel(GModel *model, TopoDS_Edge edge)
// {
//   GEdge *ge = getOCCEdgeByNativePtr(model, edge);
//   if(ge) return ge;
//   addShapeToLists(edge);
//   buildShapeFromLists(edge);
//   buildGModel(model);
//   return getOCCEdgeByNativePtr(model, edge);
// }
// 
// GFace* SGEOM_Internals::addFaceToModel(GModel *model, TopoDS_Face face)
// {
//   GFace *gf = getOCCFaceByNativePtr(model, face);
//   if(gf) return gf;
//   addShapeToLists(face);
//   buildShapeFromLists(face);
//   buildGModel(model);
//   return getOCCFaceByNativePtr(model, face);
// }
// 
// GRegion* SGEOM_Internals::addRegionToModel(GModel *model, TopoDS_Solid region)
// {
//   GRegion *gr  = getOCCRegionByNativePtr(model, region);
//   if(gr) return gr;
//   addShapeToLists(region);
//   buildShapeFromLists(region);
//   buildGModel(model);
//   return getOCCRegionByNativePtr(model, region);
// }
// 
// /* I needed getGTagOfOCC*ByNativePtr whithin setPhysicalNumToEntitiesInBox */
// int SGEOM_Internals::getGTagOfOCCVertexByNativePtr(GModel *model, TopoDS_Vertex toFind)
// {
// 	if(gvNumCache.IsBound(toFind))
// 		return (int)gvNumCache.Find(toFind);
// 	return 0;	
// }
// 
// int SGEOM_Internals::getGTagOfOCCFaceByNativePtr(GModel *model, TopoDS_Face toFind)
// {
// 	if(gfNumCache.IsBound(toFind))
// 		return (int)gfNumCache.Find(toFind);
// 	return 0;
// }
// 
// int SGEOM_Internals::getGTagOfOCCEdgeByNativePtr(GModel *model, TopoDS_Edge toFind)
// {
// 	if(geNumCache.IsBound(toFind))
// 		return (int)geNumCache.Find(toFind);
// 	return 0;
// }
// 
// int SGEOM_Internals::getGTagOfOCCSolidByNativePtr(GModel *model, TopoDS_Solid toFind)
// {
// 	if(grNumCache.IsBound(toFind))
// 		return (int)grNumCache.Find(toFind);
// 	return 0;	
// }
// 
// void SGEOM_Internals::buildGModel(GModel *model)
// {
//   // building geom vertices
//   int numv = model->getMaxElementaryNumber(0) + 1;
//   for(int i = 1; i <= vmap.Extent(); i++){
//     TopoDS_Vertex vertex = TopoDS::Vertex(vmap(i));
//     if(!getOCCVertexByNativePtr(model, vertex)){
//       model->add(new OCCVertex(model, numv, vertex));
//       numv++;
//     }
//   }
// 
//   // building geom edges
//   int nume = model->getMaxElementaryNumber(1) + 1;
//   for(int i = 1; i <= emap.Extent(); i++){
//     int i1 = vmap.FindIndex(TopExp::FirstVertex(TopoDS::Edge(emap(i))));
//     int i2 = vmap.FindIndex(TopExp::LastVertex(TopoDS::Edge(emap(i))));
//     if(!getOCCEdgeByNativePtr(model, TopoDS::Edge(emap(i)))){
//       GVertex *v1 = getOCCVertexByNativePtr(model, TopoDS::Vertex(vmap(i1)));
//       GVertex *v2 = getOCCVertexByNativePtr(model, TopoDS::Vertex(vmap(i2)));
//       model->add(new OCCEdge(model, TopoDS::Edge(emap(i)), nume, v1, v2));
//       nume++;
//     }
//   }
// 
//   // building geom faces
//   int numf = model->getMaxElementaryNumber(2) + 1;
//   for(int i = 1; i <= fmap.Extent(); i++){
//     if(!getOCCFaceByNativePtr(model, TopoDS::Face(fmap(i)))){
//       model->add(new OCCFace(model, TopoDS::Face(fmap(i)), numf));
//       numf++;
//     }
//   }
// 
//   // building geom regions
//   int numr = model->getMaxElementaryNumber(3) + 1;
//   for(int i = 1; i <= somap.Extent(); i++){
//     if(!getOCCRegionByNativePtr(model, TopoDS::Solid(somap(i)))){
//       model->add(new OCCRegion(model, TopoDS::Solid(somap(i)), numr));
//       numr++;
//     }
//   }
// }
// 
// void addSimpleShapes(TopoDS_Shape theShape, TopTools_ListOfShape &theList)
// {
//   if(theShape.ShapeType() != TopAbs_COMPOUND &&
//       theShape.ShapeType() != TopAbs_COMPSOLID) {
//     theList.Append(theShape);
//     return;
//   }
// 
//   TopTools_MapOfShape mapShape;
//   TopoDS_Iterator It(theShape, Standard_True, Standard_True);
// 
//   for(; It.More(); It.Next()) {
//     TopoDS_Shape aShape_i = It.Value();
//     if(mapShape.Add(aShape_i)) {
//       if(aShape_i.ShapeType() == TopAbs_COMPOUND ||
//          aShape_i.ShapeType() == TopAbs_COMPSOLID) {
//         addSimpleShapes(aShape_i, theList);
//       }
//       else {
//         theList.Append(aShape_i);
//       }
//     }
//   }
// }
// 
// void SGEOM_Internals::applyBooleanOperator(TopoDS_Shape tool, const BooleanOperator &op)
// {
//   if(tool.IsNull()) return;
//   if(shape.IsNull()) shape = tool;
//   else{
//     switch(op){
//     case SGEOM_Internals::Intersection :
//       {
//         TopoDS_Shape theNewShape;
//         BRep_Builder B;
//         TopoDS_Compound C;
//         B.MakeCompound(C);
//         TopTools_ListOfShape listShape1, listShape2;
//         addSimpleShapes(shape, listShape1);
//         addSimpleShapes(tool, listShape2);
//         Standard_Boolean isCompound =
//           (listShape1.Extent() > 1 || listShape2.Extent() > 1);
// 
//         TopTools_ListIteratorOfListOfShape itSub1(listShape1);
//         for(; itSub1.More(); itSub1.Next()) {
//           TopoDS_Shape aValue1 = itSub1.Value();
//           TopTools_ListIteratorOfListOfShape itSub2(listShape2);
//           for(; itSub2.More(); itSub2.Next()) {
//             TopoDS_Shape aValue2 = itSub2.Value();
//             BRepAlgoAPI_Common BO(aValue1, aValue2);
//             if(!BO.IsDone()) {
//               Msg::Error("Boolean Intersection Operator can not be performed");
//             }
//             if(isCompound) {
//               TopoDS_Shape aStepResult = BO.Shape();
//               if(aStepResult.ShapeType() == TopAbs_COMPOUND) {
//                 TopoDS_Iterator aCompIter(aStepResult);
//                 for(; aCompIter.More(); aCompIter.Next()) {
//                   B.Add(C, aCompIter.Value());
//                 }
//               }
//               else {
//                 B.Add(C, aStepResult);
//               }
//             }
//             else
//               theNewShape = BO.Shape();
//           }
//         }
//         if(isCompound) {
//           TopTools_ListOfShape listShapeC;
//           addSimpleShapes(C, listShapeC);
//           TopTools_ListIteratorOfListOfShape itSubC(listShapeC);
//           //bool isOnlySolids = true;
//           for(; itSubC.More(); itSubC.Next()) {
//             TopoDS_Shape aValueC = itSubC.Value();
//             //if(aValueC.ShapeType() != TopAbs_SOLID) isOnlySolids = false;
//           }
// 	  // if(isOnlySolids)
// 	  //   theNewShape = GlueFaces(C, Precision::Confusion());
// 	  // else
//                theNewShape = C;
//         }
//         shape = theNewShape;
//       }
//       break;
//     case SGEOM_Internals::Cut :
//       {
//         TopoDS_Shape theNewShape;
//         BRep_Builder B;
//         TopoDS_Compound C;
//         B.MakeCompound(C);
// 
//         TopTools_ListOfShape listShapes, listTools;
//         addSimpleShapes(shape, listShapes);
//         addSimpleShapes(tool, listTools);
// 
//         Standard_Boolean isCompound = (listShapes.Extent() > 1);
// 
//         TopTools_ListIteratorOfListOfShape itSub1(listShapes);
//         for(; itSub1.More(); itSub1.Next()) {
//           TopoDS_Shape aCut = itSub1.Value();
//           // tools
//           TopTools_ListIteratorOfListOfShape itSub2(listTools);
//           for(; itSub2.More(); itSub2.Next()) {
//             TopoDS_Shape aTool = itSub2.Value();
//             BRepAlgoAPI_Cut BO(aCut, aTool);
//             if(!BO.IsDone()) {
//               Msg::Error("Cut operation can not be performed on the given shapes");
//               return;
//             }
//             aCut = BO.Shape();
//           }
//           if(isCompound) {
//             if(aCut.ShapeType() == TopAbs_COMPOUND) {
//               TopoDS_Iterator aCompIter(aCut);
//               for(; aCompIter.More(); aCompIter.Next()) {
//                 B.Add(C, aCompIter.Value());
//               }
//             }
//             else {
//               B.Add(C, aCut);
//             }
//           }
//           else
//             theNewShape = aCut;
//         }
// 
//         if(isCompound) {
//           TopTools_ListOfShape listShapeC;
//           addSimpleShapes(C, listShapeC);
//           TopTools_ListIteratorOfListOfShape itSubC(listShapeC);
//           //bool isOnlySolids = true;
//           for(; itSubC.More(); itSubC.Next()) {
//             TopoDS_Shape aValueC = itSubC.Value();
//             //if(aValueC.ShapeType() != TopAbs_SOLID) isOnlySolids = false;
//           }
// 	  // if(isOnlySolids)
// 	  //   theNewShape = GlueFaces(C, Precision::Confusion());
// 	  // else
// 	       theNewShape = C;
//         }
//         shape = theNewShape;
//       }
//       break;
//     case SGEOM_Internals::Fuse :
//       {
//         BRepAlgoAPI_Fuse BO(tool, shape);
//         if(!BO.IsDone()) {
//           Msg::Error("Fuse operation can not be performed on the given shapes");
//         }
//         shape = BO.Shape();
//       }
//       break;
//     case SGEOM_Internals::Section :
//       {
//         TopoDS_Shape theNewShape;
//         BRep_Builder B;
//         TopoDS_Compound C;
//         B.MakeCompound(C);
// 
//         TopTools_ListOfShape listShapes, listTools;
//         addSimpleShapes(shape, listShapes);
//         addSimpleShapes(tool, listTools);
// 
//         Standard_Boolean isCompound = (listShapes.Extent() > 1);
//         TopTools_ListIteratorOfListOfShape itSub1(listShapes);
//         for(; itSub1.More(); itSub1.Next()) {
//           TopoDS_Shape aValue1 = itSub1.Value();
//           TopTools_ListIteratorOfListOfShape itSub2(listTools);
//           for(; itSub2.More(); itSub2.Next()) {
//             TopoDS_Shape aValue2 = itSub2.Value();
//             BRepAlgoAPI_Section BO(aValue1, aValue2, Standard_False);
//             BO.Approximation(Standard_True);
//             BO.Build();
//             if(!BO.IsDone()) {
//               Msg::Error("Section operation can not be performed on the given shapes");
//               return;
//             }
//           if(isCompound) {
//             TopoDS_Shape aStepResult = BO.Shape();
//             if(aStepResult.ShapeType() == TopAbs_COMPOUND) {
//               TopoDS_Iterator aCompIter(aStepResult);
//               for(; aCompIter.More(); aCompIter.Next()) {
//                 B.Add(C, aCompIter.Value());
//               }
//             }
//             else {
//               B.Add(C, aStepResult);
//             }
//           }
//           else
//             theNewShape = BO.Shape();
//           }
//         }
//         if(isCompound)
//           theNewShape = C;
//         shape = theNewShape;
//       }
//       break;
//     default :
//       Msg::Error("Requested boolean operation not implemented");
//       break;
//     }
//   }
// }
// 
// void SGEOM_Internals::fillet(std::vector<TopoDS_Edge> &edgesToFillet,
//                            double Radius)
// {
//   // create a tool for fillet
//   BRepFilletAPI_MakeFillet fill(shape);
//   for(unsigned int i = 0; i < edgesToFillet.size(); ++i){
//     fill.Add(edgesToFillet[i]);
//   }
//   for(int i = 1; i <= fill.NbContours(); i++){
//     fill.SetRadius(Radius, i, 1);
//   }
//   fill.Build();
//   if(!fill.IsDone()) {
//     Msg::Error("Fillet can't be computed on the given shape with the given radius");
//     return;
//   }
//   shape = fill.Shape();
// 
//   if(shape.IsNull()) return;
// 
//   // Check shape validity
//   BRepCheck_Analyzer ana(shape, false);
//   if(!ana.IsValid()) {
//     Msg::Error("Fillet algorithm have produced an invalid shape result");
//   }
// }
// 
// void GModel::_deleteOCCInternals()
// {
//   if(_occ_internals) delete _occ_internals;
//   _occ_internals = 0;
// }
// 
// int GModel::readOCCBREP(const std::string &fn)
// {
//   _occ_internals = new SGEOM_Internals;
//   _occ_internals->loadBREP(fn.c_str());
//   _occ_internals->buildGModel(this);
//   snapVertices();
//   return 1;
// }
// 
// int GModel::readOCCSTEP(const std::string &fn)
// {
//   _occ_internals = new SGEOM_Internals;
//   _occ_internals->loadSTEP(fn.c_str());
//   _occ_internals->buildGModel(this);
//   //snapVertices();
//   return 1;
// }
// 
// int GModel::readOCCIGES(const std::string &fn)
// {
//   _occ_internals = new SGEOM_Internals;
//   _occ_internals->loadIGES(fn.c_str());
//   _occ_internals->buildGModel(this);
//   return 1;
// }
// 
// int GModel::writeOCCBREP(const std::string &fn)
// {
//   if(!_occ_internals){
//     Msg::Error("No OpenCASCADE model found");
//     return 0;
//   }
//   else
//     _occ_internals->writeBREP(fn.c_str());
//   return 1;
// }
// 
// int GModel::writeOCCSTEP(const std::string &fn)
// {
//   if(!_occ_internals){
//     Msg::Error("No OpenCASCADE model found");
//     return 0;
//   }
//   else
//     _occ_internals->writeSTEP(fn.c_str());
//   return 1;
// }
// 
// int GModel::importOCCShape(const void *shape)
// {
//   _occ_internals = new SGEOM_Internals;
//   _occ_internals->loadShape((TopoDS_Shape*)shape);
//   _occ_internals->buildGModel(this);
//   snapVertices();
//   SetBoundingBox();
//   return 1;
// }
// 
// #else
// 
// void GModel::_deleteOCCInternals()
// {
// }
// 
// int GModel::readOCCBREP(const std::string &fn)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to load '%s'",
//              fn.c_str());
//   return 0;
// }
// 
// int GModel::readOCCSTEP(const std::string &fn)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to load '%s'",
//              fn.c_str());
//   return 0;
// }
// 
// int GModel::readOCCIGES(const std::string &fn)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to load '%s'",
//              fn.c_str());
//   return 0;
// }
// 
// int GModel::writeOCCBREP(const std::string &fn)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to write '%s'",
//              fn.c_str());
//   return 0;
// }
// 
// int GModel::writeOCCSTEP(const std::string &fn)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to write '%s'",
//              fn.c_str());
//   return 0;
// }
// 
// int GModel::importOCCShape(const void *shape)
// {
//   Msg::Error("Gmsh must be compiled with Open CASCADE support to import "
//              "a TopoDS_Shape");
//   return 0;
// }

#endif
